A shock absorption system for a downhole measurement while drilling instrument

Abstract

This invention provides a vibration reduction system for downhole measurement-while-drilling (MWD) instruments, comprising: a pulse damping mechanism disposed within a drill collar assembly, including a pulser valve body, an upper damping spring, and a lower damping spring, wherein the upper damping spring is disposed between the front end of the drill collar assembly and the pulser valve body, and the lower damping spring is disposed between the rear end of the drill collar assembly and the pulser valve body; and a centralizing damping mechanism sleeved on a directional probe, including a centralizer base, a rubber centralizing rib, and a supporting spring plate, wherein the rubber centralizing rib is disposed outside the centralizer base, and the supporting spring plate is connected to the centralizer base and disposed within the rubber centralizing rib, and the directional probe is connected to the pulser valve body; wherein the supporting spring plate is arc-shaped, which can solve the problems of excessive vibration and easy corrosion in existing MWD instruments when facing complex well conditions, thereby affecting the measurement accuracy and service life of the MWD instruments.

Description

Technical Field

[0001] This invention relates to the field of oil and gas drilling technology, and particularly to a vibration reduction system for downhole measurement-while-drilling instruments. Background Technology

[0002] During oil drilling, especially in complex well structures such as horizontal wells, extended reach wells, and branch wells, well site personnel need to monitor various downhole parameters in real time, such as well inclination, azimuth, and tool face. Measurement While Drilling (MWD) instruments are essential for achieving this goal. They can measure downhole information near the drill bit without interrupting normal drilling operations and transmit this information to the surface in real time.

[0003] Currently, when measuring downhole data is collected in real time by the drilling string, the instrument faces problems such as excessive vibration and easy corrosion when dealing with complex well conditions, such as temperatures exceeding 200℃, hydraulic column pressure exceeding 200MPa, vibration exceeding 20G, and maximum vibration of the well section exceeding 80G in deep and ultra-deep wells. This affects the measurement accuracy and service life of the measuring instrument. Summary of the Invention

[0004] This invention provides a vibration reduction system for downhole measurement while drilling (MWD) instruments, which can solve the problems of excessive vibration and easy corrosion of existing MWD instruments when facing complex well conditions, thereby affecting the measurement accuracy and service life of the MWD instruments.

[0005] In a first aspect, embodiments of the present invention provide a vibration damping system for downhole measurement-while-drilling instruments, comprising:

[0006] A pulse damping mechanism is provided inside the drill collar assembly, including a pulse generator valve body, an upper damping spring, and a lower damping spring. The upper damping spring is located between the front end of the drill collar assembly and the pulse generator valve body, and the lower damping spring is located between the rear end of the drill collar assembly and the pulse generator valve body.

[0007] The straightening and damping mechanism, sleeved on the directional probe, includes a straightener base, a rubber straightening rib, and a supporting spring plate. The rubber straightening rib is located outside the straightener base, and the supporting spring plate is connected to the straightener base and located inside the rubber straightening rib. The directional probe is connected to the pulse valve body. The supporting spring plate is arc-shaped.

[0008] In some embodiments, the drill collar assembly includes:

[0009] The drill collar is connected, and its tail end is provided with external drill collar threads;

[0010] A suspended drill collar short section is connected to the connecting drill collar via the external thread of the drill collar, and a short section boss is provided on the inner side of the tail end of the suspended drill collar short section;

[0011] The upper damping spring is located between the tail end of the connecting drill collar and the pulser valve body, and the lower damping spring is located between the short section boss and the pulser valve body.

[0012] In some embodiments, the pulse damping mechanism further includes:

[0013] A tightening hole is provided on the suspension drill collar short section;

[0014] A pulse blind hole is provided on the pulse generator valve body, and a pulse damping pad is provided inside the pulse blind hole;

[0015] Tighten the screw, and press it against the pulse damping pad inside the pulse blind hole through the tightening hole.

[0016] In some embodiments, the downhole measurement-while-drilling instrument vibration reduction system further includes an in-tube anti-rotation vibration reduction mechanism disposed within the directional probe, the in-tube anti-rotation vibration reduction mechanism comprising:

[0017] A spiral groove type shock absorber mandrel is provided with a spiral groove, which is used to increase elasticity, and a conical protrusion is provided at its tail end;

[0018] The shock absorber box contains multiple connecting conical rubber sections, which are interlocked with the conical protrusions of the spindle.

[0019] In some embodiments, the anti-rotation and shock-absorbing mechanism inside the probe further includes a spiral rubber, which is disposed within the spiral groove.

[0020] In some embodiments, the downhole measurement-while-drilling instrument vibration damping system, including the spiral groove vibration damping mandrel, further includes:

[0021] A blind hole for the mandrel is provided along the axial direction of the spiral groove type damping mandrel;

[0022] The mandrel side hole is located at the tail of the spiral groove damping mandrel and is connected to the blind hole of the mandrel.

[0023] In some embodiments, the shock-absorbing box includes:

[0024] Vibration-damping housing;

[0025] The vibration damping partition is located inside the vibration damping housing;

[0026] The first damping colloid is disposed between the damping housing and the damping partition, and multiple connecting cone-shaped rubbers are respectively provided on both sides of it;

[0027] The second damping colloid is disposed opposite to the first damping colloid between the damping housing and the damping partition, and has multiple damping cone-shaped rubbers on both sides.

[0028] In some embodiments, the shock-absorbing housing includes a first housing and a second housing connected to the first housing.

[0029] In some embodiments, the side of the shock-absorbing partition is provided with a shock-absorbing sealing groove, and a shock-absorbing sealing ring is provided in the shock-absorbing sealing groove.

[0030] In some embodiments, the downhole measurement-while-drilling instrument vibration reduction system further includes an in-tube vibration reduction frame, which includes a double U-shaped hollow structure to reduce vibration.

[0031] Compared with the prior art, the present invention provides a vibration reduction system for downhole measurement-while-drilling (MWD) instruments. By setting the pulse damping mechanism inside the drill collar assembly, and setting the upper damping spring between the front end of the drill collar assembly and the pulser valve body, and setting the lower damping spring between the rear end of the drill collar assembly and the pulser valve body, the vibration transmitted to the pulser valve body can be reduced. By setting the support spring plate inside the rubber stabilizing rib, when the rubber stabilizing rib is corroded, degummed, or falls off, the support spring plate can provide support, keeping the directional probe in the center position of the drill collar water hole, avoiding harmful vibrations caused by corrosion or degumming, improving the vibration and corrosion resistance of the MWD instrument, and ensuring the measurement accuracy and service life of the MWD instrument. Attached Figure Description

[0032] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0033] Figure 1 This is a schematic diagram of a downhole measurement-while-drilling instrument vibration reduction system provided in an embodiment of the present invention;

[0034] Figure 2 This is a cross-sectional view of a pulse damping mechanism provided in an embodiment of the present invention;

[0035] Figure 3 This is a perspective view of a straightening and shock-absorbing mechanism provided in an embodiment of the present invention;

[0036] Figure 4 This is a cross-sectional view of a straightening and shock-absorbing mechanism provided in an embodiment of the present invention;

[0037] Figure 5 This is a top view of an anti-rotation and shock-absorbing mechanism inside a probe according to an embodiment of the present invention;

[0038] Figure 6This is a cross-sectional view of an anti-rotation and shock-absorbing mechanism inside a probe according to an embodiment of the present invention;

[0039] Figure 7 This is a bottom view of an anti-rotation and shock-absorbing mechanism inside a probe according to an embodiment of the present invention;

[0040] Figure 8 This is a front view of the shock-absorbing frame inside the probe provided in an embodiment of the present invention;

[0041] Figure 9 This is a structural diagram of a conventional shock absorber provided by the present invention.

[0042] Figure label:

[0043] 10. Pulse damping mechanism; 110. Pulse generator valve body; 1101. Pulse blind hole; 1102. Pulse generator top cover; 1103. Pulse generator retrieval spear; 120. Upper damping spring; 130. Lower damping spring;

[0044] 20. Straightening and damping mechanism; 210. Straightener base; 220. Rubber straightening rib; 230. Support spring plate;

[0045] 30. Anti-rotation and shock absorption mechanism inside the probe; 310. Spiral groove type shock absorption mandrel; 3101. Spiral groove; 3102. Mandrel conical protrusion; 3103. Mandrel blind hole; 3104. Mandrel side hole; 3105. Spiral rubber; 320. Shock absorption box; 3201. Shock absorption housing; 3201A. First housing; 3201B. Second housing; 3202. Shock absorption partition; 3202A. Shock absorption sealing groove; 3203. First shock absorption colloid; 3204. Second shock absorption colloid;

[0046] 40. Vibration damping frame inside the probe;

[0047] 50. Drill collar assembly; 510. Connecting drill collar; 520. Suspension drill collar sub; 5201. Tightening hole;

[0048] 60. Power supply;

[0049] 70. Directional probe;

[0050] 810. Conventional damping mandrel; 820. Conventional first damping housing; 830. Conventional damping colloid; 840. Conventional second damping housing. Detailed Implementation

[0051] The invention will now be further described with reference to the accompanying drawings.

[0052] During oil drilling, especially in complex well structures such as horizontal wells, extended reach wells, and branch wells, well site personnel need to monitor various downhole parameters in real time, such as well inclination, azimuth, and tool face. Measurement While Drilling (MWD) instruments are essential for this process, as they can measure downhole information near the drill bit and transmit it to the surface in real time without interrupting normal drilling operations.

[0053] Measurement while drilling (MWD) instruments can collect downhole data in real time while the drilling string is in place. However, when faced with complex well conditions such as temperatures exceeding 200°C, hydraulic column pressure exceeding 200 MPa, vibrations exceeding 20G, maximum vibrations exceeding 80G in some sections of the Shunbei block, deep wells, and ultra-deep wells, the reliability of the instruments must be maintained in order to collect data in real time. Therefore, higher requirements are placed on the vibration resistance, impact resistance, and erosion resistance of MWD instruments.

[0054] Measurement while drilling (MSWL) instruments generally consist of three parts: a pulse generator, a power supply, and a directional probe. Rotary valve pulse generators are particularly suitable for complex wells such as deep and ultra-deep wells due to their large flow area and strong adaptability to drilling fluids. However, since there is no damping mechanism between the rotary valve pulse generator and the suspended drill collar section, vibrations from the drill bit are transmitted to the pulse generator through the suspended drill collar section, and then to the directional probe, which affects the measurement accuracy and the service life of the instrument. Therefore, it is necessary to add a damping mechanism to reduce the impact of drill collar vibration on the MSW instrument.

[0055] A rubber-bladed stabilizer is typically installed at the tail cone of a directional drilling pipe to keep the pipe centered in the drill collar waterline while isolating it from vibrations. Under normal drilling parameters and well depths, this stabilizer effectively achieves these goals. However, in ultra-deep and extra-deep wells, the rubber-bladed stabilizer is prone to damage or even detachment due to drilling fluid erosion. This results in the directional drilling pipe losing support, causing destructive oscillations, damaging the pipe, leading to instrument signal loss, forced tripping, and significant economic losses to both the instrument and the drilling progress. Therefore, a new type of directional drilling pipe tail cone vibration damping system is needed to ensure that the directional drilling pipe remains centered and aligned even after the rubber stabilizer has been corroded and damaged.

[0056] To address the aforementioned technical issues, such as Figure 1 — Figure 8 As shown, this embodiment of the invention provides a vibration damping system for downhole measurement-while-drilling instruments, comprising:

[0057] The pulse damping mechanism 10 is located inside the drill collar assembly 50 and includes a pulse valve body 110, an upper damping spring 120 and a lower damping spring 130. The upper damping spring 120 is located between the head end of the drill collar assembly 50 and the pulse valve body 110, and the lower damping spring 130 is located between the tail end of the drill collar assembly 50 and the pulse valve body 110.

[0058] The straightening and damping mechanism 20 is sleeved on the directional probe 70 and includes a straightener base 210, a rubber straightening rib 220 and a support spring plate 230. The rubber straightening rib 220 is located outside the straightener base 210, and the support spring plate 230 is connected to the straightener base 210 and located inside the rubber straightening rib 220. The directional probe 70 is connected to the pulse valve body 110. The support spring plate 230 is arc-shaped.

[0059] It should be noted that, as Figure 2 As shown, the front end of the drill collar assembly 50 is on the left and the rear end of the drill collar assembly 50 is on the right. Figure 3 , Figure 4 As shown, the stabilizer base 210 is typically cylindrical. The two ends of the supporting spring plate 230 are connected to the stabilizer base 210. The rubber stabilizer ribs 220 can be vulcanized to enhance their wear resistance, swelling resistance, and heat resistance. The cross-section of the rubber stabilizer ribs 220 can be trapezoidal or quadrilateral to facilitate contact with the inner wall of the drill collar. The rubber stabilizer ribs 220 and the supporting spring plate 230 can be arranged at intervals along the circumference of the stabilizer base 210, such as four evenly distributed around the circumference, to increase the support for the directional probe 70 inside the stabilizer base 210. During well insertion, the rubber stabilizer ribs... 220 positions the directional probe 70 and power supply 60 at the center of the drill collar water hole, while reducing vibration from the drill collar. After the rubber stabilizing rib 220 is corroded and damaged, the support spring plate 230 contacts the inner wall of the drill collar to form support, which can continue to maintain the centering and stabilization of the directional probe 70 and the measuring instrument string. When the support spring plate 230 directly contacts the inner wall of the drill collar, the instrument is in emergency working state. At this time, it can be judged by the abnormal increase of the vibration monitoring data of the instrument string. Once this situation is judged, the drilling trip should be carried out as soon as possible and the stabilizing and vibration damping mechanism 20 should be replaced if conditions permit.

[0060] In some embodiments, the drill collar assembly 50 includes:

[0061] The drill collar 510 is connected, and its tail end is provided with an external thread.

[0062] The suspended drill collar short section 520 is connected to the connecting drill collar 510 via the external thread of the drill collar, and the inner side of the tail end of the suspended drill collar short section 520 is provided with a short section boss.

[0063] The upper damping spring 120 is located between the tail end of the drill collar 510 and the pulser valve body 110, and the lower damping spring 130 is located between the short section boss and the pulser valve body 110.

[0064] It should be noted that, as Figure 2 As shown, the suspended drill collar short section 520 is a non-magnetic suspended drill collar short section. The non-magnetic suspended drill collar short section is made of non-magnetic stainless steel, which can provide a measurement environment unaffected by the magnetic field of the drill string for various specifications and models of geological steering survey instruments and infinite drilling. The left end of the suspended drill collar short section 520 is provided with an internal thread. The suspended drill collar short section 520 is connected to the external thread of the drill collar 510 through the internal thread of the short section. The left end of the pulser valve body 110 is provided with a pulser cover 1102. The upper shock-absorbing spring 120 is located between the tail end of the drill collar 510 and the pulser cover 1102. The pulser cover 1102 is also provided with a pulser retrieval spear 1103.

[0065] In some embodiments, the pulse damping mechanism 10 further includes:

[0066] The tightening hole 5201 is located on the suspension drill collar short section 520;

[0067] A pulse blind hole 1101 is provided on the pulse valve body 110, and a pulse damping pad is provided inside the pulse blind hole 1101.

[0068] Tighten the screw, and press it against the pulse damping pad inside the pulse blind hole 1101 through the tightening hole 5201.

[0069] It should be noted that, as Figure 2 As shown, the position of the tightening hole 5201 corresponds to that of the pulse blind hole 1101. By setting the tightening screw and the pulse damping pad, the pulse valve body 110 can be limited and the radial damping effect can be increased. By setting the upper damping spring 120 and the lower damping spring 130, the impact and vibration can be prevented from being transmitted to the pulse valve body 110 (or the drilling measurement instrument). During installation, the upper damping spring 120 and the lower damping spring 130 can be pre-tightened by the male thread of the upper drill collar, thereby realizing the axial damping between the pulse valve body 110 and the connecting drill collar 510. The pulse damping pad can be an FKM high hardness fluororubber cup gasket. The tightening hole 5201, the pulse blind hole 1101, and the tightening screw can be arranged circumferentially along the short section 520 of the suspended drill collar.

[0070] In some embodiments, the downhole measurement-while-drilling instrument vibration reduction system further includes an in-tube anti-rotation vibration reduction mechanism 30 disposed within the directional probe 70, the in-tube anti-rotation vibration reduction mechanism 30 comprising:

[0071] A spiral groove type shock absorber spindle 310 is provided with a spiral groove 3101, which is used to increase elasticity, and a spindle tapered protrusion 3102 is provided at its tail end.

[0072] The shock absorber box 320 has multiple connecting conical rubbers inside, which are engaged with the conical protrusion 3102 of the spindle.

[0073] In some embodiments, the anti-rotation and shock absorption mechanism 30 inside the probe tube further includes a spiral rubber 3105, which is disposed in the spiral groove 3101.

[0074] It should be noted that, as Figure 5 , 6 As shown in Figure 7, the spiral groove 3101 is located in the middle part of the spiral groove damping mandrel 310. By setting the spiral groove 3101 and the spiral rubber 3105 in the spiral groove 3101, the elasticity of the anti-rotation damping mechanism 30 in the probe can be increased. By connecting the conical rubber to the conical protrusion 3102 of the mandrel, relative rotation between the spiral groove damping mandrel 310 and the damping box 320 can be avoided. The spiral rubber 3105 can be vulcanized, and the tail end of the spiral groove damping mandrel 310 extends into the damping box 320.

[0075] In some embodiments, the spiral groove damping mandrel 310 further includes:

[0076] The blind hole 3103 of the mandrel is arranged along the axial direction of the spiral groove type damping mandrel 310;

[0077] The mandrel side hole 3104 is located at the tail of the spiral groove damping mandrel 310 and is connected to the mandrel blind hole 3103.

[0078] It should be noted that the blind hole 3103 of the mandrel is located in the axial direction of the spiral groove damping mandrel 310 and does not penetrate the spiral groove damping mandrel 310. The side hole 3104 of the mandrel is located outside the damping box 320 and is connected to the blind hole 3103 of the mandrel to achieve internal and external communication and facilitate wire threading.

[0079] In some embodiments, the shock absorber 320 includes:

[0080] 3201 shock-absorbing housing;

[0081] Vibration damping partition 3202 is provided inside vibration damping housing 3201;

[0082] The first damping colloid 3203 is disposed between the damping housing 3201 and the damping partition 3202, and multiple connecting cone-shaped rubbers are provided on both sides of it;

[0083] The second damping colloid 3204 is disposed between the damping housing 3201 and the damping partition 3202, opposite to the first damping colloid 3203, and has multiple damping cone-shaped rubbers on both sides.

[0084] In some embodiments, the shock-absorbing housing 3201 includes a first housing 3201A and a second housing 3201B connected to the first housing 3201A.

[0085] In some embodiments, the side of the shock-absorbing partition 3202 is provided with a shock-absorbing sealing groove 3202A, and a shock-absorbing sealing ring is provided in the shock-absorbing sealing groove 3202A.

[0086] It should be noted that the shock-absorbing housing 3201 is rectangular, and the shock-absorbing partition 3202 is longitudinally arranged inside the shock-absorbing housing 3201, dividing the shock-absorbing housing 3201 into two cavities: a first cavity on the left and a second cavity on the right. The first cavity contains a first shock-absorbing gel 3203, which has a hollow structure to increase elasticity. Multiple connecting cone-shaped rubbers are provided on both sides of the first shock-absorbing gel 3203 to further increase elasticity. The second cavity contains a second shock-absorbing gel 3204, which has a rectangular integral structure. Multiple shock-absorbing cone-shaped rubbers are provided on both sides of the second shock-absorbing gel 3204. By providing [something] on the side of the shock-absorbing partition 3202... The damping sealing ring can dampen and straighten the damping separator 3202. After the damping separator 3202, the first damping colloid 3203, and the second damping colloid 3204 are installed into the damping housing 3201, the first housing 3201A and the second housing 3201B are connected by bolts. Under high temperature and strong vibration environment, the anti-rotation damping mechanism 30 inside the probe will not cause relative displacement between the sensor frame and the straightener section due to the loosening of the colloid. By connecting the anti-rotation damping mechanism 30 inside the probe of this invention between the straightener section and the conventional damper, the vibration transmitted from the straightener section can be significantly reduced, thereby improving the working vibration range of the conventional damper and improving the vibration resistance of the instrument frame. Figure 9 As shown, conventional shock absorbers only have a thin layer of conventional shock-absorbing colloid 830 between the conventional shock-absorbing spindle 810 and the conventional first shock-absorbing housing 820 and the conventional second shock-absorbing housing 840, resulting in poor shock absorption.

[0087] In some embodiments, the downhole measurement-while-drilling instrument vibration reduction system further includes an in-tube vibration reduction frame 40, which includes a double U-shaped hollow structure to reduce vibration.

[0088] It should be noted that, as Figure 8 As shown, the shock-absorbing frame 40 inside the probe tube provided in this embodiment of the invention can be used interchangeably with the anti-rotation shock-absorbing mechanism 30 inside the probe tube.

[0089] It should be noted that the downhole measurement-while-drilling instrument vibration reduction system provided in this embodiment of the invention is a multi-stage vibration reduction system, including a pulse vibration reduction mechanism 10, a centralizing vibration reduction mechanism 20, an in-tube anti-rotation vibration reduction mechanism 30, and an in-tube vibration reduction frame 40. The pulse vibration reduction mechanism 10 is the first-stage vibration reduction structure, composed of an upper vibration reduction spring 120, a lower vibration reduction spring 130, and a pulse vibration reduction pad, which reduces the vibration and impact transmitted from the connecting drill collar 510 to the top of the instrument string. The centralizing vibration reduction mechanism 20 is the second-stage vibration reduction structure, composed of a centralizer base 210, rubber centralizing ribs 220, and supporting spring plates 230, which can reduce the vibration and impact transmitted from the connecting drill collar 510 to the bottom of the instrument string. To prevent harmful oscillations in the directional probe 70 caused by the shedding of the rubber flaps due to prolonged scouring; the anti-rotation damping mechanism 30 inside the probe is a third-stage damping structure, consisting of an elastic metal damper (i.e., the spiral groove 3101 on the spiral groove damping mandrel 310) and a rubber composite damper (i.e., the first damping colloid 3203 and the second damping colloid 3204); the damping skeleton 40 inside the probe is composed of an elastic metal damping module (i.e., a double U-shaped hollow structure). The downhole measurement-while-drilling instrument damping system provided in this embodiment of the invention realizes multi-stage damping of the measurement-while-drilling instrument and the measurement and control circuit module, minimizing the impact of harmful vibrations and impacts on the measurement instrument, and has wide versatility and applicability.

[0090] In summary, this invention provides a vibration reduction system for downhole measurement-while-drilling (MWD) instruments. By setting the pulse damping mechanism 10 inside the drill collar assembly 50, and setting an upper damping spring 120 between the front end of the drill collar assembly 50 and the pulser valve body 110, and a lower damping spring 130 between the rear end of the drill collar assembly 50 and the pulser valve body 110, the vibration transmitted to the pulser valve body 110 can be reduced. By setting the support spring plate 230 inside the rubber straightening rib 220, when the rubber straightening rib 220 is corroded, degummed, or falls off, the support spring plate 230 can provide support, keeping the directional probe 70 in the center position of the drill collar water hole, avoiding harmful vibrations caused by corrosion or degumming, improving the vibration and corrosion resistance of the MWD instrument, and ensuring the measurement accuracy and service life of the MWD instrument.

[0091] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A vibration damping system for downhole measurement-while-drilling instruments, characterized in that, include: A pulse damping mechanism is provided inside the drill collar assembly, including a pulse generator valve body, an upper damping spring, and a lower damping spring. The upper damping spring is located between the front end of the drill collar assembly and the pulse generator valve body, and the lower damping spring is located between the rear end of the drill collar assembly and the pulse generator valve body. The straightening and damping mechanism, sleeved on the directional probe, includes a straightener base, a rubber straightening rib, and a supporting spring plate. The rubber straightening rib is located outside the straightener base, and the supporting spring plate is connected to the straightener base and located inside the rubber straightening rib. The directional probe is connected to the pulse valve body. The supporting spring plate is arc-shaped.

2. The downhole measurement-while-drilling instrument vibration reduction system according to claim 1, characterized in that, The drill collar assembly includes: The drill collar is connected, and its tail end is provided with external drill collar threads; A suspended drill collar short section is connected to the connecting drill collar via the external thread of the drill collar, and a short section boss is provided on the inner side of the tail end of the suspended drill collar short section; The upper damping spring is located between the tail end of the connecting drill collar and the pulser valve body, and the lower damping spring is located between the short section boss and the pulser valve body.

3. The downhole measurement-while-drilling instrument vibration reduction system according to claim 2, characterized in that, The pulse damping mechanism further includes: A tightening hole is provided on the suspension drill collar short section; A pulse blind hole is provided on the pulse generator valve body, and a pulse damping pad is provided inside the pulse blind hole; Tighten the screw, and press it against the pulse damping pad inside the pulse blind hole through the tightening hole.

4. The vibration damping system for downhole measurement-while-drilling instruments according to claim 1, characterized in that, It also includes an internal anti-rotation and vibration damping mechanism disposed within the directional probe, the internal anti-rotation and vibration damping mechanism comprising: A spiral groove type shock absorber mandrel is provided with a spiral groove, which is used to increase elasticity, and a conical protrusion is provided at its tail end; The shock absorber box contains multiple connecting conical rubber sections, which are interlocked with the conical protrusions of the spindle.

5. The downhole measurement-while-drilling instrument vibration reduction system according to claim 4, characterized in that, The anti-rotation and shock absorption mechanism inside the probe also includes a spiral rubber, which is disposed inside the spiral groove.

6. The vibration damping system for downhole measurement-while-drilling instruments according to claim 4, characterized in that, The spiral groove damping mandrel also includes: A blind hole for the mandrel is provided along the axial direction of the spiral groove type damping mandrel; The mandrel side hole is located at the tail of the spiral groove damping mandrel and is connected to the blind hole of the mandrel.

7. The downhole measurement-while-drilling instrument vibration reduction system according to claim 4, characterized in that, The shock absorber box includes: Vibration-damping housing; The vibration damping partition is located inside the vibration damping housing; The first damping colloid is disposed between the damping housing and the damping partition, and multiple connecting cone-shaped rubbers are respectively provided on both sides of it; The second damping colloid is disposed opposite to the first damping colloid between the damping housing and the damping partition, and has multiple damping cone-shaped rubbers on both sides.

8. The downhole measurement-while-drilling instrument vibration reduction system according to claim 7, characterized in that, The shock-absorbing housing includes a first housing and a second housing connected to the first housing.

9. The downhole measurement-while-drilling instrument vibration reduction system according to claim 7, characterized in that, The side of the shock-absorbing partition is provided with a shock-absorbing sealing groove, and a shock-absorbing sealing ring is provided in the shock-absorbing sealing groove.

10. The downhole measurement-while-drilling instrument vibration reduction system according to any one of claims 1-9, characterized in that, It also includes a shock-absorbing frame inside the probe tube, which includes a double U-shaped hollow structure to reduce vibration.

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