the present invention will now be described in greater detail and with reference to the accompanying drawings . with reference now to fig1 , the device illustrated produces pressure pulses in drilling fluid flowing through a tubular drill collar and upper annular drill collar flow channel . the flow guide is secured to the inner diameter of the drill collar / pim . the centralizer secures the lower portion of the pulse generating device and is comprised of a non - magnetic , rigid , wear resistant material with outer flow channels . in the open position the pilot is not engaged within the pilot seat allowing flow through the pilot seat . in the open position , fluid flows past the fishing head through the mud screen where a portion of the fluid flows through the pilot assembly . fluid within the fishing head assembly flows through the upper orifice between the fishing head inner screen and the guide pole channel to allow for flow within the guide pole channel in the center of the pulser guide pole . in the closed position the pilot actuator assembly moves the pilot until it is in closed position with the pilot seat where no flow through can occur . the pilot actuator assembly is the only portion of the shaft that moves the pilot in a translational or rotational direction . the pilot orifice and pilot seat must be related to ensure hydraulic pressure differential which allows proper movement of the flow throttling device ( ftd ). the lower annular drill collar flow channel and the lower flow connecting channels are effectively sealed from the pilot channel so that their fluid flow is completely restricted from the interior of the ftd . as this sealing is achieved , fluid still enters the guide pole channel via the connecting channel , thus almost equalizing the pressure across the pilot assembly . the downward flow through the drill collar causes the fluid to flow past the fishing head and mud screen assembly . fluid then flows into the middle guide pole channel through the pilot connecting channels and into the flow throttling device ( ftd ) pressure chamber filling and expanding the flow throttling device ( ftd ) pressure chamber , causing the flow throttling device ( ftd ) to rise along the pulser guide pole . this effectively restricts the middle annular drill collar flow channel from the lower annular drill collar flow channel , thereby generating a positive signal pulse at the throttle zone for pulse generation and corresponding signal transmittal . these conditions provide generation of pulses as the flow throttling device ( ftd ) reaches both the closed and opened positions . the present invention allows for several sized ftd &# 39 ; s ( fig2 a - d ) to be placed in a drilling collar , thereby allowing for different flow restrictions and / or frequencies which will cause an exponential increase in the data rate that can be transmitted up hole . positioning of the pulser assembly within the drill collar and utilizing the flow guide significantly decreases the turbulence of the fluid . the linear motion of the flow throttling device ( ftd ) axially along the pulser guide pole is both up and down ( along a bi - axial direction ). conventional pulsers require adjustments to provide a consistent pulse at different pressures and flow rates . the signal provided in conventional technology is by a pulse that can be received up hole by use of a pressure transducer that is able to differentiate pressure pulses ( generated downhole ). these uphole pulses are then converted into useful signals providing information for the oilfield operator , such as gamma ray counts per second , azimuth , etc . another advantage of the present disclosure is the ability to create a clean ( essentially free of noise ) pulse signal that is essentially independent of the fluid flow rate or pressure within the drill collar . the present invention thereby allows for pulses of varying amplitudes ( in pressure ) and frequencies to increase the bit rate . addition of more than one pulser assemblies would lead to an exponential increase in the data bit rate received uphole . the connecting flow channels allow for equalization of the pressure drop across the pilot to be matched by the flow throttling device ( ftd ) as a servo - amplifier . the primary pressure change occurs between the inner middle and inner lower flow channels providing a pressure drop created by the flow throttling device ( ftd ) restricting the annular flow through the throttle zone . the pressure drop across the pilot is the only force per unit area that must be overcome to engage or disengage the pilot from the seated position and effect a pulse . this pressure drop across a minimal cross - sectional area of the pilot ensures that only a small force is required to provide a pulse in the larger flow area of the ftd . while the present invention has been described herein with reference to a specific exemplary embodiment thereof , it will be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention as set forth in the appended claims . the specification and drawings included herein are , accordingly to be regarded in an illustrative rather than in a restrictive sense . magnetic coupling alleviates the concern for a rotary seal or bellow type seal which other mwd tools possess and it is noted that such seals have caused flooding and maintenance issues . fig2 a is a cut - away longitudinal sectional view of the fishing head assembly . fig2 b is a continuation of the cross - sectional view shown in fig2 a and includes details of the pulser , turbine , coil and motor assemblies . fig2 c is a continuation of fig2 b , illustrating more of the mwd components , particularly the various instrumentation , starting with the motor assembly through the gamma ray chassis end plug . fig4 describes the operation of the magnetic coupling and how the pilot is actuated . fig6 describes the guide pole channel and orifice chamber . fig7 describes a cross section of a downhole pulse generating device in the open position . fig8 describes a downhole pulse generating device powered by a positive displacement motor or turbine with a rotating valve flow bevel . fig9 describes a downhole pulse generating device with an alternate valving for filling the pressure chambers . fig1 describes a downhole pulse generating device where the inner and outer magnets are contained within the flow throttling device ( ftd ). fig1 describes a downhole pulse generating device where the flow through , a drill string adapter , and alternative measurement while drilling device allows for annular drill collar flow that is directed to the drilling bit to aid in clearing debris from the drill head . the detailed description refers to the placement of a measurement - while - drilling ( mwd ) device [ 100 ] located within a drill collar [ 29 ] in a well bore incorporating fluid generally known as drilling mud [ 115 ]. descriptions of the present disclosure are incorporated within the aforementioned detailed description . the mwd device [ 100 ] is described in greater detail referring specifically to the accompanying figures . with reference now to fig1 , the device illustrated produces pressure pulses in drilling fluid flowing through a tubular drill collar [ 29 ] and an upper annular drill collar flow channel [ 2 ]. the flow guide [ 23480 ] is secured to the inner diameter of the drill collar [ 29 ]. the centralizer [ 36 ] secures the lower portion of the mwd device [ 100 ] and is comprised of a non - magnetic , rigid , wear resistant material with outer flow channels . major assemblies of the mwd device [ 100 ] are shown as the fishing head assembly [ 15000 ], flow throttling device ( ftd ) and pulser actuator assembly complete the pulser assembly [ 170 ], turbine [ 110 ] and coil assembly [ 125 ], motor [ 130 ], various instrumentation [ 160 ], battery [ 71500 ], and stinger [ 87010 ]. fig2 a details the open position ; drilling mud [ 115 ] flows past the fishing head assembly [ 15000 ] and fishing head outer screen [ 15020 ] where a portion of the drilling mud [ 115 ] flows through the fishing head inner screen [ 15030 ]. drilling mud [ 115 ] within the fishing head assembly [ 15000 ] flows through the upper orifice [ 26020 ] between the fishing head inner screen [ 15030 ] and the guide pole channel [ 175 ] to allow for flow within the guide pole channel [ 175 ] in the center of the pulser guide pole [ 26010 ]. these conditions provide generation of a pulse as the flow throttling device ( ftd ) reaches both the closed and opened positions . the present invention allows for several sized flow throttling devices ( fig1 ) to be placed in a drilling collar , thereby allowing for various pressure pulse amplitudes and / or frequencies and consequential exponential increases in the data rate . in a further embodiment , fig2 b describes the mwd device [ 100 ] which utilizes a turbine [ 100 ] residing near and within proximity of a flow diverter [ 38013 ]. the flow diverter [ 38013 ] diverts drilling mud [ 115 ] in an lower annular drill collar flow channel [ 120 ] into and away from the turbine blade [ 38230 ] such that the force of the drilling mud [ 115 ] causes the turbine blade [ 38230 ] and turbine assembly [ 110 ] to rotationally spin around a coil assembly [ 125 ]. the coil assembly [ 125 ] generates electrical power for operating the motor [ 130 ] and various instrumentation [ 160 ] ( fig1 ). the motor [ 130 ] comprises a worm gear [ 26920 ] or transmission system with fixed or adjustable gear ratios , a drive shaft [ 26910 ] centrally located between the motor [ 130 ] and the outer magnets [ 26510 ] and mechanically coupled to both . located in a position external to the magnetic pressure cup [ 26210 ] are outer magnets [ 26510 ] placed in relation to inner magnets [ 26410 ] located in a position inside the magnetic pressure cup [ 26210 ] forming a magnetic coupling . the coupling is for translating the rotational motion of the motor [ 130 ], and outer magnets [ 26510 ] to linear motion for the inner magnets [ 26410 ] via a magnetic polar interaction . the linear motion of the inner magnets [ 26410 ] help move the pilot actuator assembly [ 135 ], comprised of the rear pilot shaft [ 26240 ], front pilot shaft [ 26230 ] and pilot [ 26220 ], linearly moving the pilot [ 26220 ] into the pilot seat [ 140 ] closing the pilot seat orifice [ 145 ] lifting the flow throttling device ( ftd ) [ 26150 ] into the flow throttling device ( ftd ) orifice [ 150 ] thereby generating a pressure pulse . a pilot valve [ 26225 ] is comprised of the pilot [ 26220 ], the pilot seat [ 140 ] and the pilot seat orifice [ 145 ]. further rotation of the motor [ 130 ], drive shaft [ 26910 ] and outer magnets [ 26510 ] move the pilot actuator assembly [ 135 ] and pilot [ 26220 ] away from the pilot seat [ 140 ] causing the flow throttling device ( ftd ) [ 26150 ] to move away from the flow throttling device ( ftd ) orifice [ 150 ] thereby generating a negative pressure pulse . the inner magnets [ 26410 ] are isolated from the drilling mud [ 115 ] via a double rolling bellows [ 26310 ] which is described further in fig4 and 5 . a pulse in the drilling mud [ 115 ] is sensed by the uphole system comprised of a pressure transducer and / or other sound wave receivers and communicated , optionally with wireless devices , to a computer [ 165 ]( not shown ) for interpretation and data reception and storage . additionally , further description of fig2 b shows the turbine [ 110 ] which resides within the lower annular drill collar flow channel [ 120 ] of the flow guide [ 23480 ]. the lower annular drill collar flow channel [ 120 ] may have special flow diverters [ 38013 ] that direct the flow of the drilling mud [ 115 ] through and around the surface of the turbine [ 110 ]. the flow diverters [ 38013 ] project from the flow guide extension [ 26710 ] in a fashion so as to direct the flow of the drilling mud [ 115 ] to move the turbine blade [ 38230 ] and attached turbine assembly [ 110 ] thereby changing the linear motion of the drilling mud [ 115 ] into rotational motion of the turbine assembly [ 110 ]. the turbine shroud [ 38310 ] contains magnets [ 155 ] that rotate with the motion of the turbine [ 110 ] around a coil assembly [ 125 ] causing electrical power to be generated for the operation of the motor [ 130 ]. the outside diameter of the turbine blade [ 38230 ] is smaller than the flow guide extension [ 26710 ] inner diameter , thereby allowing the turbine [ 110 ] to be removed concurrently with the pulser housing [ 26810 ] from the mwd device [ 100 ]. the configuration of the turbine blade [ 38230 ] and flow diverter [ 38013 ] may be of various angles depending on the drilling conditions and needs of the pulsation rate ( frequency ) and magnitude ( amplitude ) for the downhole pulser . additionally the electrical power is used for operation of various instrumentation [ 160 ] ( fig1 ) such as accelerometers , photo - multiplier tubes ( pmt ), crystal gamma ray scintillators and other useful instrumentation sensors and processors . excess power provides charging for the battery [ 71500 ] ( fig1 ) for storage and use under certain conditions where the coil assembly [ 125 ] does not generate enough power to operate the mwd device [ 100 ] under no flow conditions . the velocity and consistency of the drilling mud [ 115 ] traveling through the lower annular drill collar flow channel [ 120 ] may vary due to wellbore conditions generally providing varying forces on the turbine [ 110 ]. the varying forces cause the turbine [ 110 ] to spin at different velocities exhibiting a wide range of power to be developed by the coil assembly [ 125 ]. fluctuations in the power are regulated through an electrical regulation circuit . the motor [ 130 ] receives a signal from a computer [ 165 ] ( not shown ) that is onboard the mwd device [ 100 ] to move the drive shaft [ 26910 ]. the motor [ 130 ] may be synchronous , asynchronous , or stepper and is activated to fully rotate or to rotationally increment various degrees , depending on the wellbore conditions or the observed signal intensity and / or duration . fig2 c shows the section of the mwd device [ 100 ] containing various instrumentation [ 160 ], starting with the motor [ 130 ]. standard instrumentation , known to those skilled in the art , may include but are not limited to accelerometers , photo - multiplier tubes ( pmt ), crystal gamma ray scintillators and other useful instrumentation needed for monitoring drilling , fracing , formations , pressures , and / or temperatures . fig2 d illustrates the final bottom section of the mwd device [ 100 ] including the battery [ 71500 ], the stinger [ 87010 ] and the stinger nose [ 87020 ]. positioning of the flow throttling device ( ftd ) [ 26150 ] ( fig3 ) within the drill collar [ 29 ] and utilizing the flow guide [ 23480 ] significantly decreases the turbulence of the drilling mud [ 115 ]. the force required to move the pilot [ 26220 ] into or out of the pilot seat [ 140 ] is minimal . operational power consumption to retain the pilot in any position is less than current mwd device pulsing or fracing technology . the linear motion of the flow throttling device ( ftd ) [ 26150 ] axially along the pulser guide pole [ 26010 ] is both up and down ( along a bi - axial direction ). fig3 shows the pulser assembly [ 170 ] within a drill collar [ 29 ] when in the closed position the pilot actuator assembly [ 135 ] moves the pilot [ 26220 ] until it is in closed position with the pilot seat [ 140 ] where no flow through can occur . the front pilot shaft [ 26230 ] is the only portion of the pilot actuator assembly [ 135 ] that moves the pilot [ 26220 ] in a translational or rotational direction . for fig3 , when the pilot is in closed position , the guide pole channel [ 175 ] and the lower flow connecting channels [ 23 ] are effectively sealed so that drilling mud [ 115 ] flow is completely restricted through the pilot orifice . as this sealing is achieved , drilling mud [ 115 ] still enters both the guide pole channel [ 175 ] and separately , the lower flow connecting channels [ 23 ], thus almost equalizing the pressure across the pilot [ 26220 ]. the drilling mud [ 115 ] flows through the guide pole channel [ 175 ] causing the flow throttling device ( ftd ) [ 26150 ] to rise along the pulser guide pole [ 26010 ]. this effectively restricts the middle annular drill collar flow channel [ 305 ] from the lower annular drill collar flow channel [ 120 ], thereby generating a positive signal pulse at the throttle zone for pulse generation [ 14 ] and corresponding signal transmittal , fracing , bit cleansing or drill rate penetration increases due to the hammering and pulsing effect . in fig4 starting from the outside portion of the assembly and moving toward the center , the pulser assembly [ 170 ] comprising a pulser housing [ 26810 ] of a non - magnetic material , and a magnetic pressure cup [ 26210 ], which is also comprised of a non - magnetic material , and encompassed by the outer magnets [ 26510 ]. the outer magnets [ 26510 ] may comprise several magnets , or one or more components of magnetic or ceramic material exhibiting several magnetic poles within a single component . additionally the magnetic pole positions may be customizable , depending on the drilling conditions , to achieve a clear pressure signal . the outer magnets [ 26510 ] are housed in an outer magnet housing [ 26515 ] that is attached to the drive shaft [ 26910 ]. within the magnetic pressure cup [ 26210 ] is housed the inner magnet assembly , that contains the pilot actuator assembly [ 135 ] comprised of the rear pilot shaft [ 26240 ] linearly engaged in a front pilot shaft [ 26230 ], which is moved longitudinally in the center of the pulser assembly [ 170 ]. within the magnetic pressure cup [ 26210 ] is the rear pilot shaft [ 26240 ], also comprised of non - magnetic material . the outer magnets [ 26510 ] and the inner magnets [ 26410 ] are placed so that the magnetic polar regions interact , attracting and repelling as the outer magnets [ 26510 ] are moved about the inner magnets [ 26410 ]. using the relational combination of magnetic poles of the moving outer magnets [ 26510 ] and inner magnets [ 26410 ], causes the inner magnets [ 26410 ] with the rear pilot shaft [ 26240 ], to move the pilot actuator assembly [ 135 ] linearly and interactively as a magnetic field coupling . the linear motion is along the rear pilot shaft [ 26240 ], through the front pilot shaft [ 26230 ], the double rolling bellows [ 26310 ] and to the pilot [ 26220 ] thereby opening or closing the passage between the pilot [ 26220 ] and the pilot seat [ 140 ]. the use of outer magnets [ 26510 ] and inner magnets [ 26410 ] to provide movement from rotational motion to linear motion also allows the motor [ 130 ] ( fig2 b ) to be located in an air atmospheric environment in lieu of the use of a lubricating fluid [ 180 ] environment inside the magnetic pressure cup [ 26210 ]. this also allows for a decrease in the cost of the motor [ 130 ] ( fig2 b ), decreased energy consumption and subsequently decreased cost of the actual mwd / pulser device [ 100 ] ( fig1 ). it also alleviates the possibility of flooding the tool instead of the use of a moving mechanical seal and the time and effort to effect and maintain a pressure compensating system . switching fields between the outer magnets [ 26510 ] and the inner magnets [ 26410 ] provides a magnetic spring like action that allows for pressure relief by moving the pilot [ 26220 ] away from the pilot seat [ 140 ] thereby regulating the pulse magnitude . additionally the outer magnets [ 26510 ], operate in the lower pressure of the pulser housing [ 26810 ] as opposed to the higher pressure within the magnetic pressure cup [ 26210 ], allowing for a greatly reduced need in the amount of energy required by the motor to longitudinally move the pilot actuator assembly [ 135 ]. the front pilot shaft [ 26230 ] passes through the anti - rotation block [ 26350 ] located below the double rolling bellows [ 26310 ]. the anti - rotation block [ 26350 ] located near the double rolling bellows is secured to the inside of the magnetic pressure cup [ 26210 ] and restricts the rotational movement of the front pilot shaft [ 26230 ]. referring to fig5 , an embodiment of the double rolling bellows [ 26310 ] includes sealing a portion of the surface of the front pilot shaft [ 26230 ] engaged around a pilot shaft land [ 26351 ] and the interior of the hollow magnetic pressure cup [ 26210 ]. sealing of the double rolling bellows [ 26310 ] keeps drilling mud [ 115 ] from entering the bellows chamber [ 185 ] and intermingling with the inner magnet chamber lubricating fluid [ 180 ] when the pilot [ 26220 ] is moved to an open position off the pilot seat [ 140 ]. another embodiment is to allow the double rolling bellows [ 26310 ] to move linearly , concurrent with the front pilot shaft [ 26230 ]. the design of the double rolling bellows [ 26310 ] interacting with the front pilot shaft [ 26230 ] and the bellows chamber [ 185 ] allow the double rolling bellows [ 26310 ] to conform to the space constraints of the bellows chamber [ 185 ] providing flexible sealing without the double rolling bellows [ 26310 ] being displaced by the drilling mud [ 115 ]. it was also found that the double loop [ 190 ] configuration of the double rolling bellows [ 26310 ] consumes much less energy than previous designs thereby reducing the overall consumption of energy . energy consumption is also reduced by pre - filling the bellows chamber [ 185 ] with appropriate lubricating fluid [ 180 ]. this allows for reduction of the pressure differential on both sides of the double rolling bellows [ 26310 ]. the smaller pressure differential enhances performance by the double rolling bellows [ 26310 ] and minimizes wear and energy consumption . the lubricating fluid [ 180 ] may be petroleum , synthetic or bio - based and should exhibit compression characteristics similar to hydraulic fluid . the double loop [ 190 ] configuration of the double rolling bellows is designed to minimize energy consumption . fig6 shows another embodiment of the present disclosure pertaining to the configuration of the guide pole channel [ 175 ] and orifice chamber [ 200 ] in the proximity of the pilot seat [ 140 ] and pilot seat orifice [ 145 ]. when the pilot [ 26220 ] is in contact with the pilot seat [ 140 ] the flow throttling device ( ftd ) [ 26150 ] moves toward the flow throttling device ( ftd ) seat [ 210 ]. conversely ( and inversely ), when the pilot [ 26220 ] is not contacting the pilot seat [ 140 ] the flow throttling device ( ftd ) [ 26150 ] withdraws from the flow throttling device ( ftd ) seat [ 210 ]. the pressure differential between the drilling mud [ 115 ] pressure and the orifice chamber [ 200 ] moves the flow throttling device ( ftd ) [ 26150 ] more rapidly , enabling a very forceful restriction of the flow throttling device ( ftd ) orifice [ 150 ] and a very defined pulse and therefore clearer signals which are more easily interpreted . fig7 is an alternate view of cross - section of a pulsing / fracturing / drilling ( pfd ) device [ 101 ] showing the pfd device [ 101 ] without a drill collar [ 29 ]. the pulsing / fracturing / drilling ( pfd ) medium [ 116 ] flows into the upper annular drill collar flow channel [ 2 ] located inside the flow guide [ 23480 ] which may be integral to the collar [ 29 ]. internal to the flow guide [ 23480 ] is a pulser guide pole [ 26010 ] which allows the flow throttling device ( ftd ) [ 26150 ] to move axially along the pulser guide pole [ 26010 ] where the flow throttling device ( ftd ) [ 26150 ] will contact the flow throttling device ( ftd ) seat [ 210 ] thereby sealing off the outer annular drill collar flow channels [ 215 ]. the flow guide seal [ 220 ] keeps or pfd medium [ 116 ] from flowing around the flow guide [ 23480 ] thereby ensuring that the pfd medium [ 116 ] only flows through the outer annular drill collar flow channels [ 215 ] and through the guide pole channel [ 175 ]. fig7 shows the flow throttling device ( ftd ) [ 26150 ] in the open position and the pilot [ 23220 ] in the closed position sitting within the pilot seat [ 140 ], where the flow throttling device ( ftd ) [ 26150 ] is away from the flow throttling device ( ftd ) seat [ 210 ] allowing the flow throttling device ( ftd ) pressure chamber [ 225 ] to fill with or pfd medium [ 116 ] through the pilot connecting channel [ 230 ] via the guide pole channel [ 175 ]. as the flow throttling device ( ftd ) pressure chamber [ 225 ] fills with pfd medium [ 116 ], the flow throttling device ( ftd ) [ 26150 ] moves up within the flow guide [ 23480 ] due to hydraulic pressure caused by the or pfd medium [ 116 ] exerting a hydraulic force acting on the flow throttling device ( ftd ) [ 26150 ] in the flow throttling device ( ftd ) pressure chamber [ 225 ]. the force acts to push the flow throttling device ( ftd ) [ 26150 ] up within the flow guide [ 23480 ] and subsequently moves the outer magnets [ 26510 ] in the same direction . the outer magnets [ 26510 ] continue to move up and subsequently the opposing magnetic fields of the outer magnets [ 26510 ] pass the center of the magnetic fields of the inner magnets [ 26410 ]. the inner magnets [ 26410 ] attached to the pilot [ 23220 ] then , due to the magnetic fields , move in the opposite direction as the outer magnets [ 26510 ] cause the pilot [ 23220 ] to move down , in the same direction as the inner magnets [ 26410 ], thereby moving the pilot [ 23220 ] off the pilot seat [ 140 ]. movement of the pilot [ 23220 ] off the pilot seat [ 140 ] allows or pfd medium [ 116 ] to flow through the pilot exhaust channels [ 235 ] into the lower annular drill collar flow channel [ 120 ] thereby relieving pressure in the flow throttling device ( ftd ) pressure chamber [ 225 ]. release of this pressure causes the flow throttling device ( ftd ) [ 26150 ] to reverse direction away from the flow throttling device ( ftd ) seat [ 210 ]. during the downward motion of the flow throttling device ( ftd ) [ 26150 ], the outer magnets [ 26510 ] move downward thereby moving past the center of the magnetic fields of the inner magnets [ 26410 ] subsequently causing the inner magnets [ 26410 ] to move in an upward direction , again due to opposing magnetic fields . the upward movement of the inner magnets [ 26410 ] moves the pilot [ 23220 ] into the pilot seat [ 140 ] causing the flow throttling device ( ftd ) pressure chamber [ 225 ] to refill to repeat the aforementioned cycle . the outer magnets [ 26510 ] are stacked in position such that the fields are in opposition to each other . for example the stack top magnetic end is “ n ” and the bottom end is “ s ”. moving down to the next magnet the field is “ s ” on the top and “ n ” on the bottom . repeating the first sequence , the top end is “ n ” and the bottom end is “ s ”. the inner magnets [ 26410 ] fields are stacked similarly . the movement of the similar magnetic fields of the outer magnets [ 26510 ] to the inner magnets [ 26410 ] causes repulsion of the flow throttling device ( ftd ) [ 26150 ] and the pilot [ 23220 ] basically holding the pilot [ 23220 ] in position until the outer magnet passes the center field of the opposing inner magnet [ 26410 ] which is an opposite pole and therefore repelled by the outer magnet [ 26510 ] causing the inner magnet [ 26410 ] to move in the opposite direction as the outer magnet [ 26510 ]. additionally , the pilot [ 23220 ] is attached to the inner magnets [ 26410 ] and through a double rolling bellows [ 26310 ] which resides in a bellows chamber [ 185 ]. the bellows chamber [ 185 ] is filled with a viscous liquid and also acts as a dampening source for the pilot [ 23220 ]. fig8 shows a cross section of a pulsing / fracturing / drilling ( pfd ) device [ 101 ] without the drill collar [ 29 ] where the ( fluid or gas ) pfd medium [ 116 ] ( the dashed arrows indicate direction of flow ) flows into the flow guide [ 23480 ] and into the upper annular drill collar flow channel [ 2 ] and also into the pulser guide pole [ 26010 ] in the pilot flow channel [ 175 ]. the pfd medium [ 116 ] from the upper annular drill collar flow channel [ 2 ] flows through the outer annular drill collar flow channels [ 215 ] when the flow throttling device ( ftd ) [ 26150 ] is in the open position and not in contact with the flow throttling device ( ftd ) seat [ 210 ]. when the flow throttling device ( ftd ) [ 26150 ] is in the open position the pfd medium [ 116 ] flows unrestricted around the flow throttling device ( ftd ) [ 26150 ] to the bypass flow regulator [ 255 ]. pfd medium [ 116 ] from the bypass flow regulator [ 255 ] continues through the turbine blades [ 38230 ] thus rotating the rotating motor [ 250 ] and the rotating pilot valve [ 245 ]. linear movement of the flow throttling device ( ftd ) [ 26150 ] is caused by the pfd medium [ 116 ] that is moving through the pulser guide pole [ 26010 ] in the guide pole channel [ 175 ] and exiting into the flow throttling device ( ftd ) pressure chamber [ 225 ] above the rotating pilot valve [ 245 ]. the rotating pilot valve [ 245 ] includes a feature noted as the rotating valve flow bevel [ 280 ] and is coupled to a rotating motor [ 250 ]. the rotating motor [ 250 ] provides rotational motion to the rotating pilot valve [ 245 ]. the upper portion of the rotating pilot valve [ 245 ] resides at the bottom of the pulser guide pole [ 26010 ] and , upon rotation , allows the rotating valve flow bevel [ 280 ] to seal and unseal the guide pole exit channel [ 26011 ]. sealing the guide pole exit channel [ 26011 ] forces the pfd medium [ 116 ] to flow into the flow throttling device ( ftd ) pressure chamber [ 225 ] thereby hydraulically moving the flow throttling device ( ftd ) [ 26150 ] up the pulser guide pole [ 26010 ] until it contacts the flow throttling device ( ftd ) seat [ 210 ] closing off the outer annular drill collar flow channels [ 215 ]. the rotating motor [ 250 ] rotates the rotating pilot valve [ 245 ] such that the rotating valve flow bevel [ 280 ] passes the guide pole exit channel [ 26011 ] allowing for the pfd medium [ 116 ] in the flow throttling device ( ftd ) pressure chamber [ 225 ] to evacuate , thereby reducing the hydraulic pressure acting on the flow throttling device ( ftd ) [ 26150 ] and allowing the flow throttling device ( ftd ) [ 26150 ] to move downward on the pulser guide pole [ 26010 ] unsealing the outer annular drill collar flow channels [ 215 ]. eventually the rotational motion of the rotating pilot valve [ 245 ] moves the rotating valve flow bevel [ 280 ] past the guide pole exit channel [ 26011 ], sealing the guide pole exit channel [ 26011 ] and creating back pressure within the guide pole channel [ 175 ] and refilling the flow throttling device ( ftd ) pressure chamber [ 225 ]. additionally there is a high pressure relief spring [ 290 ] that , should the rotating motor [ 250 ] fail , allows the rotating pilot valve [ 245 ] to move away from the guide pole exit channel [ 26011 ] allowing pfd medium [ 116 ] to evacuate the system . fig9 shows a cross section of a pfd device [ 101 ] in a drill collar [ 29 ] where the pfd medium [ 116 ] ( the dashed arrows indicate direction of flow ) flows into the flow guide [ 23480 ] into the upper annular drill collar flow channel [ 2 ] and also into the pulser guide pole [ 26010 ] in the guide pole channel [ 175 ]. the pfd medium [ 116 ] from the upper annular drill collar flow channel [ 2 ] flows through the outer annular drill collar flow channels [ 215 ] when the flow throttling device ( ftd ) [ 26150 ] is in the open position and not in contact with the flow throttling device ( ftd ) seat [ 210 ]. when the flow throttling device ( ftd ) [ 26150 ] is in the open position , the pfd medium [ 116 ] flows unrestricted around the flow throttling device ( ftd ) [ 26150 ] to the bypass flow regulator [ 255 ]. pfd medium [ 116 ] from the bypass flow regulator [ 255 ] continues moving down the outer annular drill collar flow channels [ 215 ] where it contacts the turbine blade [ 38230 ] causing the turbine blade [ 38230 ] to rotate the rotating motor [ 250 ]. thus the linear motion of the pfd medium [ 116 ] is converted into rotational motion at the rotating motor [ 250 ]. the rotating motor [ 250 ] then rotates the rotating pilot valve [ 245 ] within the flow throttling device ( ftd ) [ 26150 ]. the rotating pilot valve [ 245 ] has a top angled cutout [ 260 ] and a bottom angled cutout [ 265 ] that are located at the top - most portion of the rotating pilot valve [ 245 ] within the lower end of the pulser guide pole [ 26010 ]. the pfd medium [ 116 ] in the guide pole channel [ 175 ] within the pulser guide pole [ 26010 ] contacts the top angle cutout [ 260 ] of the rotating pilot valve [ 245 ] that is rotating due to the rotational movement of the rotating motor [ 250 ]. when the angle of the rotating top angled cutout [ 260 ] coincides with the chamber inlet channel [ 270 ] within the pulser guide pole [ 26010 ], pfd medium [ 116 ] is allowed to enter the flow throttling device ( ftd ) pressure chamber [ 225 ]. the pfd medium [ 116 ] then exerts a hydraulic pressure raising the flow throttling device ( ftd ) [ 26150 ] until it contacts the flow throttling device ( ftd ) seat [ 210 ] shutting off the flow of pfd medium [ 116 ] through the outer annular drill collar flow channels [ 215 ]. with the rotating pilot valve [ 245 ] continuing to rotate , the top angled cutout [ 260 ] passes by the chamber inlet channel [ 270 ] thus sealing off any pfd medium [ 116 ] flow into the flow throttling device ( ftd ) pressure chamber [ 225 ]. the bottom angled cutout [ 265 ] then coincides with the chamber exhaust channel [ 275 ] allowing the evacuation of pfd medium [ 116 ] from the flow throttling device ( ftd ) pressure chamber [ 225 ] and causing the flow throttling device ( ftd ) [ 26150 ] to move away from the flow throttling device ( ftd ) seat [ 210 ] and allowing pfd medium [ 116 ] to flow again through the outer annular drill collar flow channels [ 215 ]. the movement of the flow throttling device ( ftd ) [ 26150 ] against and away from the flow throttling device ( ftd ) seat [ 210 ] thereby opening and closing the outer annular drill collar flow channels [ 215 ] sends a pressure pulse through the pfd medium [ 116 ], causing cleansing of any drill bit that may be attached . the pulse causes an increased removal of cuttings from any sort of drilling operation , annular area , or drill bit teeth or jets and also assists in fracturing formations due to the high shear pressures caused in the sudden release ( shock ) of a tremendous volume pfd medium [ 116 ] or of any fluid / gas column . the large pressure pulses caused at the location of the perforations / liner / etc . are hydraulically amplified like a hammering action upon any sort of drill bit mechanism attached to it . one frac truck could be used instead of 10 , and the hydraulic fracture pressure would be amplified higher than what is presently used today and also done exactly at the location of the perforations / liner / etc . where it is needed the most . this could increase the size of the fracture job and how deeply into the formation the fracture is propagated and how many fracture lines ( i . e . : increased surface area opened by the fracture , actually branch out to enhance the flow ability of the formation ) are created and increase production from any well exponentially . in a drilling operation , it would increase the rop ( rate of penetration ). in tertiary recovery operations , this would also limit the size and amount of pumps required to perform the injection process , since the hydraulic amplification ( pfd device ) could be set down near where the wellbore encounters the formation where it is pushing out into . the top angled cutout [ 260 ] and the bottom angled cutout [ 265 ] are continuously rotated as part of the rotating valve [ 245 ] any time the pfd medium [ 116 ] is being used . passage of the top angled cutout [ 260 ] and the bottom angled cutout [ 265 ] by the chamber inlet channel [ 270 ] and the chamber exhaust channel [ 275 ] act to provide a constantly intermittent flow of pfd medium [ 116 ] through the flow throttling device ( ftd ) pressure chamber [ 225 ]. the rotational frequency of the top angled cutout [ 260 ] and the bottom angled cutout [ 265 ] by the chamber inlet channel [ 270 ] and the chamber exhaust channel [ 275 ] determine the pressure pulse duration and frequency . rotational speeds ( frequency ) and pulse amplitudes ( pressure pulse sizes ) are variable , depending on the operator &# 39 ; s settings and what is intended . additionally , the pulser guide pole [ 26010 ] allows for the chamber inlet channel [ 270 ] and the chamber exhaust channel [ 275 ] to be linearly offset so that the top angled cutout [ 260 ] never aligns with the chamber exhaust channel [ 275 ] and in parallel , the bottom angled cutout [ 265 ] never aligns with the chamber inlet channel [ 270 ]. fig1 is a cross section of a pfd device [ 101 ] without the drill collar [ 29 ] ( not shown ) where the pfd medium [ 116 ] ( the dashed arrows indicate direction of flow ) flows into the flow guide [ 23480 ] and into the upper annular drill collar flow channel [ 2 ] and also into the guide pole channel [ 175 ]. the pfd medium [ 116 ] from the upper annular drill collar flow channel [ 2 ] flows through the outer annular drill collar flow channels [ 215 ] when the flow throttling device ( ftd ) [ 26150 ] is in the open position and not in contact with the flow throttling device ( ftd ) seat [ 210 ]. the flow throttling device ( ftd ) [ 26150 ] has , within and attached to it , outer magnet [ 26510 ] which is arranged in detail as explained in fig7 . inner magnets [ 26410 ] move axially along the pulser guide pole [ 26010 ] to open and close the pilot exhaust channels [ 235 ] and the pilot connecting channels [ 230 ] ( shown if fig7 ). when the flow throttling device ( ftd ) [ 26150 ] moves down to open position the outer magnets [ 26510 ] attached to the flow throttling device ( ftd ) [ 26150 ] move with the flow throttling device ( ftd ) [ 26150 ] past the inner magnets [ 26410 ] causing the magnetic field of the outer magnets [ 26510 ] to repel the magnetic field of the inner magnets [ 26410 ] moving the inner magnets [ 26410 ] upward to close off the pilot exhaust channels [ 235 ]. the pfd medium [ 116 ] flows down the pilot flow channel [ 175 ] and flows through the pilot connecting channels [ 230 ] ( shown in fig7 ) into the flow throttling device ( ftd ) pressure chamber [ 225 ] creating a hydraulic pressure that moves the flow throttling device ( ftd ) [ 26150 ] upwards to contact the flow throttling device ( ftd ) seat [ 210 ] thus closing off the outer annular drill collar flow channels [ 215 ]. the flow throttling device ( ftd ) [ 26150 ] moves up to closed position due to the hydraulic pressure within the flow throttling device ( ftd ) pressure chamber [ 225 ], the outer magnets [ 26510 ] attached to the flow throttling device ( ftd ) [ 26150 ] move with the flow throttling device ( ftd ) [ 26150 ] past the inner magnets [ 26410 ] causing the magnetic field of the outer magnets [ 26510 ] to repel the magnetic field of the inner magnets [ 26410 ] moving the inner magnets [ 26410 ] downward to open up the pilot exhaust channels [ 235 ] and closing off the pilot connecting channels [ 230 ] ( shown in fig7 ) decreasing the hydraulic pressure in the flow throttling device ( ftd ) pressure chamber [ 225 ] and allowing the flow throttling device ( ftd ) [ 26150 ] to move downward to open position and thus repeating the cycle . due to the arrangement of the magnetic poles at the ends of the magnets [ 26410 , 26510 ] and their orientation within the flow throttling device ( ftd ) [ 26150 ] the passing of the outer magnets [ 26510 ] causes the inner magnets [ 26410 ] to repel the inner magnets [ 26410 ] to move upward thereby sealing the flow throttling device ( ftd ) pressure chamber [ 225 ]. in this position the inner magnets [ 26410 ] open up the pilot exhaust channels [ 235 ] where pressure is relieved from the flow throttling device ( ftd ) pressure chamber [ 225 ] and the flow throttling device ( ftd ) [ 26150 ] is pushed down the pulser guide pole [ 26010 ]. movement of the flow throttling device ( ftd ) [ 26150 ] and outer magnets [ 26510 ] downward allows the outer magnets [ 26510 ] to travel past the inner magnets [ 26410 ], magnetically attracting the inner magnets [ 26410 ] off the openings for the flow throttling device ( ftd ) pressure chamber [ 225 ]. the outer magnets [ 26510 ] move down to cover the pilot exhaust channels [ 235 ] opening up the pilot connecting channel [ 230 ] ( shown in fig7 ) to allow for filling of the flow throttling device ( ftd ) pressure chambers [ 225 ]. as described in fig1 , the inner magnets [ 26410 ] act as valving to open and close the flow throttling device ( ftd ) pressure chamber [ 225 ] and the pilot connecting channel [ 230 ] ( shown in fig7 ). fig1 provides a schematic for a drill string adapter [ 500 ] with an outer casing [ 510 ] with an upper pressure chamber [ 515 ] and a lower pressure chamber [ 520 ]. the lower pressure chamber [ 520 ] has one or more vent channel [ 525 ] which allows for internal pressure to be equal to that of the annulus pressure . additionally , a drill bit adapter [ 530 ] is shaped such that a piston land [ 535 ] with a top land surface [ 540 ] and a bottom land surface [ 545 ] and land seal [ 550 ] are axially moveable and define a variable volume within the upper pressure chamber [ 515 ] and lower pressure chamber [ 520 ]. the drill bit adapter [ 530 ] also has a centrally located adapter channel [ 555 ] through which pfd medium [ 116 ] flows to the drilling head [ not shown ]. the lower pressure chamber [ 520 ] has an internal lower end spline [ 560 ] through which an external drill bit adapter spline [ 565 ] fits . the internal lower end spline [ 560 ] and external drill bit adapter spline [ 565 ] allow for axial movement of the drill bit adapter [ 530 ] independent of the drill string adapter [ 500 ]. the intermeshing of the internal lower end spline [ 560 ] and the external drill bit adapter spline [ 565 ] interlock the drill string adapter [ 500 ] and the drill bit adapter [ 530 ] so that they move as a unit rotationally . the upper pressure chamber [ 515 ] contains an upper spring [ 570 ] which functions to provide a variable pressure on the top land surface [ 540 ] of the piston land [ 535 ] thereby transmitting that force through the piston land [ 535 ] to the drill bit adapter [ 530 ]. the upper spring [ 570 ] compensates for variations in movement of the drill bit [ not shown ] and subsequently the drill bit adapter [ 530 ]. the lower pressure chamber [ 520 ] includes a lower spring [ 575 ] which resides below the piston land [ 535 ] and the drill bit adapter [ 530 ] and contacts the bottom land surface [ 545 ]. the lower spring [ 575 ] and the upper spring [ 570 ] act in opposing direction ( inversely ) to each other on the piston land [ 535 ], bottom land surface [ 545 ] and the top land surface [ 540 ] thereby dampening the axial motion of the drill bit adapter [ 530 ]. optionally , this design may be a drill bit adapter vent [ 580 ] from the adapter channel [ 555 ] to the lower pressure chamber [ 520 ] for an mwd [ 100 ] or pfd device [ 101 ] such that the vent channel [ 525 ] may be capped or blocked . installation of an mwd device [ 100 ] or pfd device [ 101 ] may be installed within the adapter channel [ 555 ].