A rotary steering bias mechanism for measurement and control while drilling

Abstract

The present application relates to the technical field of rock drilling, and in particular to a rotary steering biasing mechanism for measurement and control while drilling, comprising a drill rod, a detachable drill bit being arranged at one end of the drill rod, a support sleeve rod being rotatably arranged on the drill rod and being coaxial with the drill rod, and a rotary wheel deflector being arranged on the support sleeve rod; when the drill bit of the present invention needs to be deflected to one side, a driving rod on one side of the drill bit deflection direction drives a sliding block to move in a sliding hole through a telescopic rod, so that the sliding block moves toward the downhill end of the inclined section, at which time the sliding block drives the roller away from the inner wall of the drill hole, while a driving rod on the other side of the drill bit deflection direction drives the sliding block to move in the sliding hole through the telescopic rod, so that the sliding block moves toward the uphill end of the inclined section, at which time the sliding block drives the roller to contact the inner wall of the drill hole, thereby increasing the friction force on this side, causing the drill bit to deflect to the side with less friction force, thereby realizing precise control of the deflection direction of the drill bit.

Description

Technical Field

[0001] The present application relates to the technical field of rock drilling, and in particular to a rotary steering bias mechanism for measurement and control while drilling. Background Art

[0002] Measurement and control while drilling is a technology that measures downhole parameters in real time during the drilling process. It allows drilling engineers to obtain downhole data while drilling, such as well inclination, azimuth, drilling pressure, torque, formation pressure and resistivity. These data are crucial for real-time monitoring and adjustment of the drilling process, and help ensure the accuracy of the drilling trajectory and the safety of drilling operations. Measurement and control while drilling technology is usually used in combination with logging while drilling technology, which provides detailed information about the formation, such as rock type, porosity and water saturation.

[0003] The rotary steerable offset mechanism is a key component in the measurement and control while drilling technology. It allows the drill bit to be directional controlled during drilling to achieve a precise wellbore trajectory. This mechanism is usually included in the rotary steerable system, which can continuously rotate during drilling while fine-tuning the direction of the drill bit. In this way, non-productive time can be reduced or eliminated, such as when the rotation needs to be stopped for direction adjustment.

[0004] For example, a rotary guide device with publication number CN113756717A relates to the field of new energy vehicle technology. The prior art includes guide ribs, which are configured to be able to be extended in an oblique direction and pushed against the well wall; a rotary guide head short section connected to the guide ribs, in which a control circuit is provided, which issues a control instruction to the guide ribs to control their extension, and a measuring and transmitting short section connected to the rotary guide head short section via a cable, which detects system attitude parameters; wherein the measuring and transmitting short section transmits the detected system attitude parameters to the rotary guide head short section via the cable, and the control circuit controls the sequential extension of the guide ribs according to the downhole position information and the system attitude parameters.

[0005] However, the above existing technologies still have some defects when drilling rocks:

[0006] 1. The rib units of the above-mentioned prior art are evenly arranged on the circumference of the drill string. The rib units adopt a guide wing deflection method. When drilling rotary guide offset is performed, each rib unit is powered by an independent hydraulic mechanism so that they can be deployed in sequence and pushed against the well wall, thereby applying lateral force to the drill bit to achieve directional movement of the drill bit. The guide wings are located on the outside of the drill string in a protruding shape and can pass through the soil. However, when drilling in hard rock formations, due to the high hardness of the rock, the guide ribs may encounter difficulties in moving when pushing against the well wall, resulting in being stuck; at the same time, if the well wall is uneven or there are protruding rocks, the guide ribs may be stuck by these irregular parts when deployed, affecting their normal operation.

[0007] 2. The above-mentioned prior art uses the method of deflecting the guide wings to offset the drilling rotary steering, but the size of the guide wings is always fixed. The fixed size of the guide wings means that its adaptability under different geological conditions may be limited. In hard rock formations, smaller guide wings may not provide sufficient lateral force to achieve effective offset. On the contrary, in soft rock formations, larger guide wings may cause excessive offset or drill bit instability.

[0008] Based on this, and in accordance with the above-mentioned viewpoints, there is still room for improvement in the existing technology for rock drilling. Summary of the invention

[0009] In order to solve the above technical problems, the present application provides a rotary steering bias mechanism for measurement and control while drilling, which adopts the following technical solutions:

[0010] A rotary steering biasing mechanism for measurement and control while drilling comprises a drill rod, one end of which is provided with a detachable drill bit, a support sleeve rod coaxially provided on the drill rod, and a rotary wheel deflector provided on the support sleeve rod;

[0011] The rotary wheel deflector comprises a deflection cover arranged on a supporting sleeve rod, the deflection cover is coaxial with the supporting sleeve rod, an inclined section is arranged on the deflection cover, and a plurality of evenly distributed sliding holes are opened circumferentially on the inclined section.

[0012] Preferably, a sliding groove corresponding to the sliding hole is provided on the support sleeve rod, a receiving hole is provided on one side of the bottom of the sliding groove, and a driving rod is provided between the receiving hole and the sliding groove;

[0013] A groove is provided on one side of the sliding slot close to the accommodating hole, a driving gear threadedly connected to the driving rod is rotatably arranged in the groove, and a telescopic rod connected to the driving rod is slidably arranged in the sliding slot.

[0014] Preferably, a sliding block connected to the telescopic rod is slidably arranged in the sliding hole, a roller is rotatably arranged on the sliding block, and folding plates are arranged between both ends of the sliding block and the sliding hole.

[0015] Preferably, a deflection booster is provided on the support sleeve rod;

[0016] The deflection booster includes a water inlet hole opened in the drill rod, an annular water storage tank is opened in the support sleeve, a plurality of connecting holes connecting the water inlet hole and the annular water storage tank are opened circumferentially on the drill rod, and a connecting hole connecting the accommodating hole is opened on the annular water storage tank.

[0017] Preferably, a delivery hole is provided in the driving rod, a nozzle is provided on the sliding block, and a telescopic hose connected to the delivery hole is provided on the nozzle.

[0018] Preferably, a flow-blocking deflector is provided on the deflection cover;

[0019] The flow-blocking deflector comprises a support baffle disposed in the deflection cover and located at one end of the inclined section, a resisting rod is slidably penetrated on the support baffle, and a resisting plate connected to one end of the driving rod is slidably disposed in the sliding groove;

[0020] A return spring is arranged between the resistance rod and the resistance plate.

[0021] Preferably, an inclined oblique baffle is slidably provided on one side of the deflection cover, an inclined abutment plate is provided at one end of the abutment rod, and the inclined surface of the inclined abutment plate abuts against the oblique baffle.

[0022] Preferably, a resistance spring is provided between the oblique baffle and the deflection cover.

[0023] Preferably, an eccentric guide is provided on the support sleeve rod;

[0024] The support sleeve rod is symmetrically provided with support rings located on one side of the cover, and a support cylinder is movably provided between the two support rings.

[0025] Preferably, a plurality of evenly distributed electric push rods are circumferentially arranged on the support sleeve, the electric push rods are located in the support tube, and the telescopic ends of the electric push rods are in conflict with the inside of the support tube.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. When the drill bit of the present invention needs to deflect to one side, the driving rod on one side of the drill bit deflection direction drives the sliding block to move in the sliding hole through the telescopic rod, so that the sliding block moves toward the downhill end of the inclined section. At this time, the sliding block will drive the roller away from the inner wall of the drill hole, and the driving rod on the other side of the drill bit deflection direction drives the sliding block to move in the sliding hole through the telescopic rod, so that the sliding block moves toward the uphill end of the inclined section. At this time, the sliding block will drive the roller to contact the inner wall of the drill hole, increasing the friction on this side, causing the drill bit to deflect to the side with smaller friction, thereby realizing precise control of the deflection direction of the drill bit.

[0028] 2. The movement of the sliding block of the present invention will drive the nozzle and the telescopic rod to move together, and the sliding block will drive the roller and the nozzle to move together, so that the nozzle on one side is away from the drill bit, and the nozzle on the other side is close to the drill bit. At this time, the water flow impact force generated by the nozzle will push the nozzle to deviate to one side, thereby changing the drilling direction of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the present invention.

[0030] Figure 2 It is a partial structural schematic diagram of the present invention.

[0031] Figure 3 It is a schematic structural diagram of the rotary wheel deflector of the present invention.

[0032] Figure 4 The present invention Figure 3 A partial enlarged view of point A.

[0033] Figure 5 It is a plan view of the rotor deflector, the deflection booster and the flow control deflector of the present invention.

[0034] Figure 6 The present invention Figure 5 A partial enlarged view of point B.

[0035] Figure 7 It is a schematic structural diagram of the flow-blocking deflector of the present invention.

[0036] Figure 8 It is a structural schematic diagram of the eccentric guide of the present invention.

[0037] Description of the accompanying drawings: 1. drill rod; 2. drill bit; 3. support sleeve rod; 4. rotary wheel deflector; 41. deflection cover; 411. sliding hole; 42. inclined section; 421. downhill end; 422. uphill end; 43. sliding groove; 44. receiving hole; 45. driving rod; 46. groove; 461. driving gear; 47. telescopic rod; 48. sliding block; 481. roller; 49. folding plate; 5. deflection booster; 51. feed Water hole; 52, annular water storage tank; 53, connecting hole; 54, connecting hole; 55, delivery hole; 56, nozzle; 57, telescopic hose; 6, flow control deflector; 61, supporting baffle; 62, resistance rod; 63, resistance plate; 64, connecting ring; 65, return spring; 66, oblique baffle; 67, inclined resistance plate; 68, resistance spring; 7, eccentric guide; 71, supporting ring; 72, supporting cylinder; 73, electric push rod. DETAILED DESCRIPTION

[0038] The following is combined with Figures 1 to 8 This application is described in further detail.

[0039] The embodiment of the present application discloses a rotary steering bias mechanism for measurement and control while drilling, which changes the drilling direction of the drill bit by reducing the friction on one side and increasing the friction on the other side, while flushing the inner wall of the borehole and deflecting the impact force generated by changing the flushing position.

[0040] Embodiment 1:

[0041] Reference Figure 1 and Figure 2 As shown, a rotary steering biasing mechanism for measurement and control while drilling comprises a drill rod 1, a detachable drill bit 2 is arranged at one end of the drill rod 1, and a support sleeve rod 3 coaxial with the drill rod 1 is rotatably arranged on the drill rod 1.

[0042] During drilling, the drill rod 1 will drive the drill bit 2 to rotate, so that the drill bit 2 drills into the soil to break the rock and advance the drilling. During the drilling process of the drill bit 2, the support sleeve 3 will be driven to move with the drill bit 2. The support sleeve 3 does not rotate relative to the drill rod 1 during the drilling process. The direction of the drill bit 2 is controlled by the rotary deflector 4 arranged on the support sleeve 3, and the lateral movement or deflection of the drill bit 2 is achieved by changing the deflection angle.

[0043] At the same time, the deflection booster 5 arranged on the support sleeve rod 3 can spray water to flush the inner wall of the drill hole, and deflect the drill bit 2 by changing the impact force generated by the flushing position.

[0044] Reference Figure 3 , Figure 4 and Figure 5 As shown, specifically, the wheel deflector 4 includes a deflection cover 41 arranged on the support sleeve rod 3, the deflection cover 41 is coaxial with the support sleeve rod 3, an inclined section 42 is arranged on the deflection cover 41, a plurality of evenly distributed sliding holes 411 are circumferentially opened on the inclined section 42, a sliding groove 43 corresponding to the sliding holes 411 is opened on the support sleeve rod 3, a receiving hole 44 is opened on one side of the bottom of the sliding groove 43, a driving rod 45 is jointly arranged between the receiving hole 44 and the sliding groove 43, and a groove 46 is opened on one side of the sliding groove 43 close to the receiving hole 44.

[0045] During the drilling process of the drill bit 2, the driving gear 461 rotatably arranged in the groove 46 is driven to rotate through the existing driving technology. The rotating driving gear 461 will drive the driving rod 45 through the threaded connection with the driving rod 45, so that the driving rod 45 moves in the accommodating hole 44 and the sliding groove 43. The telescopic rod 47 slidably arranged in the sliding groove 43 will move with the driving rod 45 through the connection with the driving rod 45.

[0046] At this time, the sliding block 48 slidingly arranged in the sliding hole 411 will move together through the connection with the telescopic rod 47, and the telescopic rod 47 will perform telescopic movement to adapt to the inclination angle of the inclined section 42, and the moving sliding block 48 will drive the roller 481 rotating thereon, and the roller 481 will contact the inner wall of the drill hole.

[0047] For ease of understanding, the relatively smaller diameter end of the inclined section 42 is now defined as a downhill end 421 , and the relatively larger diameter end of the inclined section 42 is now defined as an uphill end 422 .

[0048] When the drill bit 2 needs to deflect to one side, the driving rod 45 on one side of the deflection direction of the drill bit 2 drives the sliding block 48 to move in the sliding hole 411 through the telescopic rod 47, so that the sliding block 48 moves toward the downhill end 421 of the inclined section 42. At this time, the sliding block 48 will drive the roller 481 away from the inner wall of the drill hole, and the driving rod 45 on the other side of the deflection direction of the drill bit 2 drives the sliding block 48 to move in the sliding hole 411 through the telescopic rod 47, so that the sliding block 48 moves toward the uphill end 422 of the inclined section 42. At this time, the sliding block 48 will drive the roller 481 to contact the inner wall of the drill hole.

[0049] Since the roller 481 on one side is away from the inner wall of the drill hole, and the roller 481 on the other side is in contact with the inner wall of the drill hole, the friction force on the roller 481 on one side is reduced, while the friction force on the roller 481 on the other side is increased, so that the deflection cover 41 drives the support sleeve rod 3 to deviate to one side, thereby changing the drilling direction of the drill bit 2.

[0050] On the contrary, when the drill bit 2 needs to deflect to the other side, the driving rod 45 on the other side of the deflection direction of the drill bit 2 drives the sliding block 48 to move in the sliding hole 411 through the telescopic rod 47, so that the sliding block 48 moves toward the downhill end 421 of the inclined section 42. At this time, the sliding block 48 will drive the roller 481 away from the inner wall of the drill hole, and the driving rod 45 on one side of the deflection direction of the drill bit 2 drives the sliding block 48 to move in the sliding hole 411 through the telescopic rod 47, so that the sliding block 48 moves toward the uphill end 422 of the inclined section 42. At this time, the sliding block 48 will drive the roller 481 to resist the drill hole.

[0051] Since the roller 481 on the other side is away from the inner wall of the drill hole, and the roller 481 on one side is in contact with the inner wall of the drill hole, the friction force on the roller 481 on the other side is reduced, while the friction force on the roller 481 on one side is increased, so that the deflection cover 41 drives the support sleeve rod 3 to deviate to the other side, thereby changing the drilling direction of the drill bit 2.

[0052] After the drill bit 2 completes the deflection, the driving rod 45 drives all the sliding blocks 48 back to the same position through the telescopic rod 47. At this time, the resistance forces of all the rollers 481 and the inner wall of the drill hole are the same and offset each other, thereby restoring to a balanced state to continue drilling in the predetermined direction.

[0053] Among them, folding plates 49 are arranged between the two ends of the sliding block 48 and the sliding hole 411. The folding plates 49 will fold and unfold with the movement of the sliding block 48. The folding plates 49 will prevent sand, gravel and soil generated during the drilling process from entering the deflection cover 41 from the sliding hole 411.

[0054] Reference Figure 4 , Figure 5 and Figure 6As shown, specifically, the deflection booster 5 includes a water inlet hole 51 opened in the drill rod 1, an annular water storage tank 52 is opened in the support sleeve 3, and a plurality of connecting holes 53 connecting the water inlet hole 51 and the annular water storage tank 52 are opened circumferentially on the drill rod 1.

[0055] During the drilling process of the drill bit 2, water will be transported into the water inlet hole 51, and the water will pass through the connecting hole 53 into the annular water storage tank 52. During this process, no matter how the drill rod 1 rotates, the connecting hole 53 can always transport water into the annular water storage tank 52, and the water entering the annular water storage tank 52 will pass through the connecting hole 54 opened on the annular water storage tank 52. The connecting hole 54 transports the water into the receiving hole 44 by connecting with the receiving hole 44.

[0056] Then, the water flow in the receiving hole 44 will enter the delivery hole 55 opened in the driving rod 45. The sliding block 48 is provided with a nozzle 56, and the nozzle 56 is provided with a telescopic hose 57 connected with the delivery hole 55. The water flow entering the delivery hole 55 will be sprayed out from the nozzle 56 through the telescopic hose 57, and the sprayed water will flush the inner wall of the drilled hole.

[0057] At the same time, the movement of the sliding block 48 will drive the nozzle 56 and the telescopic rod 47 to move together. When the drill bit 2 needs to deflect to one side, the driving rod 45 on one side of the deflection direction of the drill bit 2 drives the sliding block 48 to move in the sliding hole 411 through the telescopic rod 47, so that the sliding block 48 moves toward the downhill end 421 of the inclined section 42. At this time, the sliding block 48 will drive the roller 481 and the nozzle 56 to move together, so that the nozzle 56 moves away from the drill bit 2; and the driving rod 45 on the other side of the deflection direction of the drill bit 2 drives the sliding block 48 to move in the sliding hole 411 through the telescopic rod 47, so that the sliding block 48 moves toward the uphill end 422 of the inclined section 42. At this time, the sliding block 48 will drive the nozzle 56 to approach the drill bit 2.

[0058] Since the nozzle 56 on one side is far away from the drill bit 2 and the nozzle 56 on the other side is close to the drill bit 2 , the water flow impulse generated by the nozzle 56 will push the nozzle 56 to deviate to one side, thereby changing the drilling direction of the drill bit 2 .

[0059] On the contrary, when the drill bit 2 needs to deflect to the other side, the driving rod 45 on the other side of the deflection direction of the drill bit 2 drives the sliding block 48 to move in the sliding hole 411 through the telescopic rod 47, so that the sliding block 48 moves toward the downhill end 421 of the inclined section 42. At this time, the sliding block 48 will drive the roller 481 and the nozzle 56 to move together, so that the nozzle 56 moves away from the drill bit 2; and the driving rod 45 on one side of the deflection direction of the drill bit 2 drives the sliding block 48 to move in the sliding hole 411 through the telescopic rod 47, so that the sliding block 48 moves toward the uphill end 422 of the inclined section 42. At this time, the sliding block 48 will drive the nozzle 56 to approach the drill bit 2.

[0060] Since the nozzle 56 on the other side is far away from the drill bit 2 and the nozzle 56 on one side is close to the drill bit 2 , the water flow impulse generated by the nozzle 56 will push the nozzle 56 to deviate to the other side, thereby changing the drilling direction of the drill bit 2 .

[0061] After the drill bit 2 completes the deflection, the driving rod 45 drives all the sliding blocks 48 back to the same position through the telescopic rod 47. At this time, the impulse of the water flow sprayed by all the nozzles 56 is the same and offsets each other, thereby restoring the equilibrium state to continue drilling in the predetermined direction.

[0062] Embodiment 2:

[0063] Reference Figure 5 , Figure 6 and Figure 7 As shown, based on the first embodiment, during the drilling process of the drill bit 2, the drill bit 2 will spray a large amount of water flow to flush the drilling direction, and the drilled soil and drilled debris will be flushed out by the water flow.

[0064] During this process, a flow blocking deflector 6 is provided on the deflection cover 41, which can prevent the water flow sprayed by the drill bit 2 from affecting the roller 481 during the steering process of the drill bit 2, and ensure that the deviation direction of the drill bit 2 is accurate.

[0065] The flow control deflector 6 includes a support baffle 61 arranged in the deflection cover 41 and located at one end of the inclined section 42. A resistance rod 62 is slidably penetrated on the support baffle 61. A resistance plate 63 connected to one end of the driving rod 45 is slidably arranged in the sliding groove 43. A connecting ring 64 is arranged on the resistance rod 62.

[0066] An inclined oblique baffle 66 is slidably provided on one side of the deflection cover 41 .

[0067] When the sliding block 48 moves toward the uphill end 422 of the inclined section 42, the driving rod 45 will drive the contact plate 63 to compress the return spring 65 arranged between the connecting ring 64 and the contact plate 63. The compressed return spring 65 will push the contact rod 62 through the connecting ring 64, so that the contact rod 62 will drive the inclined contact plate 67 arranged at one end of the contact rod 62. Since the inclined surface of the inclined contact plate 67 contacts the inclined baffle 66, the inclined surface of the inclined contact plate 67 contacts the inclined baffle 66, so that the inclined baffle 66 extends out of the deflection cover 41 and compresses the contact spring 68 arranged between the oblique baffle 66 and the deflection cover 41. The oblique baffle 66 can block the influence of the water flow sprayed by the drill bit 2 on the roller 481 during the steering process of the drill bit 2.

[0068] At the same time, the oblique baffle 66 will contact the inner wall of the drill hole, and the contact point between the oblique baffle 66 and the inner wall of the drill hole changes, thereby changing the accuracy of the deviation direction of the drill bit 2.

[0069] After the drill bit 2 completes the deflection, the sliding block 48 moves toward the downhill end 421 of the inclined section 42, and the driving rod 45 drives the resistance plate 63 to release the reset spring 65 arranged between the connecting ring 64 and the resistance plate 63. At this time, the compressed resistance spring 68 pushes the inclined baffle plate 66, so that the inclined baffle plate 66 pushes the inclined abutment plate 67 through the inclined surface of the inclined abutment plate 67, and the inclined abutment plate 67 pushes the resistance rod 62, so that the driving rod 45 moves with the movement of the inclined abutment plate 67 until the inclined baffle plate 66 is completely retracted back into the deflection cover 41.

[0070] Embodiment three:

[0071] Reference Figure 8 As shown, on the basis of the first embodiment, an eccentric guide 7 is provided on the support sleeve rod 3 , and the eccentric guide 7 deflects the drill bit 2 by the principle of eccentricity, thereby achieving precise control and deflection of the drill bit 2 .

[0072] Specifically, the support sleeve 3 is symmetrically provided with support rings 71 located on one side of the deflection cover 41, a support tube 72 is movably provided between the two support rings 71, and a plurality of evenly distributed electric push rods 73 are circumferentially provided on the support sleeve 3. The electric push rods 73 are located in the support tube 72, and the telescopic ends of the electric push rods 73 are in conflict with the inside of the support tube 72.

[0073] During the drilling process of the drill bit 2, the support tube 72 will come into contact with the inner wall of the drill hole. A plurality of electric push rods 73 extend to different lengths, that is, when the electric push rod 73 on one side is extended, the electric push rod 73 on the other side is shortened, causing the support sleeve 3 to have an axial deviation in the support tube 72, thereby changing the deflection direction of the drill bit 2.

[0074] The implementation principle of the present invention is:

[0075] (1): During drilling, the drill rod 1 drives the drill bit 2 to rotate, so that the drill bit 2 drills into the soil to break the rock and advance the drilling. During the drilling process of the drill bit 2, the support sleeve 3 will be driven to move with the drill bit 2. The support sleeve 3 does not rotate relative to the drill rod 1 during the drilling process.

[0076] (2): During the drilling process of the drill bit 2, when the drill bit 2 needs to deflect to one side, the driving rod 45 on one side of the deflection direction of the drill bit 2 drives the sliding block 48 to move in the sliding hole 411 through the telescopic rod 47, so that the sliding block 48 moves toward the downhill end 421 of the inclined section 42. At this time, the sliding block 48 will drive the roller 481 away from the inner wall of the drill hole, and the driving rod 45 on the other side of the deflection direction of the drill bit 2 drives the sliding block 48 to move in the sliding hole 411 through the telescopic rod 47, so that the sliding block 48 moves toward the uphill end 422 of the inclined section 42. At this time, the sliding block 48 will drive the roller 481 to contact the inner wall of the drill hole.

[0077] (3): Since the roller 481 on one side is away from the inner wall of the drill hole, while the roller 481 on the other side is in contact with the inner wall of the drill hole, the friction force on the roller 481 on one side is reduced, while the friction force on the roller 481 on the other side is increased, so that the deflection cover 41 drives the support sleeve rod 3 to deviate to one side, thereby changing the drilling direction of the drill bit 2.

[0078] (4): At the same time, the movement of the sliding block 48 will drive the nozzle 56 and the telescopic rod 47 to move together. When the drill bit 2 needs to deflect to one side, the driving rod 45 on the side of the deflection direction of the drill bit 2 drives the sliding block 48 to move in the sliding hole 411 through the telescopic rod 47, so that the sliding block 48 moves toward the downhill end 421 of the inclined section 42. At this time, the sliding block 48 will drive the roller 481 and the nozzle 56 to move together, so that the nozzle 56 is away from the drill bit 2; and the driving rod 45 on the other side of the deflection direction of the drill bit 2 drives the sliding block 48 to move in the sliding hole 411 through the telescopic rod 47, so that the sliding block 48 moves toward the uphill end 422 of the inclined section 42. At this time, the sliding block 48 will drive the nozzle 56 to approach the drill bit 2. At this time, the water flow impact of the nozzle 56 will push the nozzle 56 to deviate to one side, thereby changing the drilling direction of the drill bit 2.

[0079] (5): After the drill bit 2 completes the deflection, the driving rod 45 drives all the sliding blocks 48 to return to the same position through the telescopic rod 47. At this time, the resistance forces of all the rollers 481 and the inner wall of the drill hole are the same and cancel each other out, thereby restoring to a balanced state. At the same time, the impulse forces of the water flows sprayed by all the nozzles 56 are the same and cancel each other out, thereby restoring to a balanced state to continue drilling in the predetermined direction.

[0080] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary steering biasing mechanism for measurement and control while drilling, comprising a drill rod (1), one end of the drill rod (1) being provided with a detachable drill bit (2), characterized in that: A support sleeve rod (3) coaxially disposed on the drill rod (1) is rotatably provided, and a rotary wheel deflector (4) is provided on the support sleeve rod (3); The rotary wheel deflector (4) comprises a deflection cover (41) arranged on the support sleeve rod (3), the deflection cover (41) and the support sleeve rod (3) being coaxial, the deflection cover (41) being provided with an inclined section (42), and the inclined section (42) being provided with a plurality of evenly distributed sliding holes (411) circumferentially; The support sleeve rod (3) is provided with a sliding groove (43) corresponding to the sliding hole (411) in a one-to-one manner, a receiving hole (44) is provided on one side of the bottom of the sliding groove (43), and a driving rod (45) is provided between the receiving hole (44) and the sliding groove (43); A groove (46) is provided on one side of the sliding groove (43) close to the accommodating hole (44), a driving gear (461) threadedly connected to the driving rod (45) is rotatably arranged in the groove (46), and a telescopic rod (47) connected to the driving rod (45) is slidably arranged in the sliding groove (43); A sliding block (48) connected to the telescopic rod (47) is slidably disposed in the sliding hole (411), a roller (481) is rotatably disposed on the sliding block (48), and folding plates (49) are disposed between both ends of the sliding block (48) and the sliding hole (411).

2. The rotary steering biasing mechanism for measurement and control while drilling according to claim 1, characterized in that: A deflection booster (5) is provided on the support sleeve (3); the deflection booster (5) comprises a water inlet hole (51) provided in the drill rod (1); an annular water storage groove (52) is provided in the support sleeve (3); a plurality of communication holes (53) are provided circumferentially on the drill rod (1) for connecting the water inlet hole (51) and the annular water storage groove (52); and a connection hole (54) is provided on the annular water storage groove (52) for connecting the accommodating hole (44).

3. The rotary steering biasing mechanism for measurement and control while drilling according to claim 2, characterized in that: A delivery hole (55) is provided in the driving rod (45), a nozzle (56) is provided on the sliding block (48), and a telescopic hose (57) connected to the delivery hole (55) is provided on the nozzle (56).

4. The rotary steering biasing mechanism for measurement and control while drilling according to claim 1, characterized in that: The deflection cover (41) is provided with a flow-blocking deflector (6); the flow-blocking deflector (6) comprises a support baffle (61) provided in the deflection cover (41) and located at one end of the inclined section (42); a resisting rod (62) is slidably penetrated through the support baffle (61); and a resisting plate (63) connected to one end of the driving rod (45) is slidably provided in the sliding groove (43); A return spring (65) is provided between the resistance rod (62) and the resistance plate (63).

5. The rotary steering biasing mechanism for measurement and control while drilling according to claim 4, characterized in that: An inclined oblique baffle (66) is slidably provided on one side of the deflection cover (41), an inclined abutment plate (67) is provided on one end of the abutment rod (62), and the inclined surface of the inclined abutment plate (67) abuts against the inclined baffle (66).

6. The rotary steering biasing mechanism for measurement and control while drilling according to claim 5, characterized in that: A resisting spring (68) is provided between the oblique baffle (66) and the deflection cover (41).

7. The rotary steering biasing mechanism for measurement and control while drilling according to claim 6, characterized in that: An eccentric guide (7) is provided on the support sleeve rod (3); The support sleeve rod (3) is symmetrically provided with a support ring (71) located on one side of the deflection cover (41), and a support cylinder (72) is movably provided between the two support rings (71).

8. The rotary steering biasing mechanism for measurement and control while drilling according to claim 7, characterized in that: A plurality of evenly distributed electric push rods (73) are circumferentially arranged on the support sleeve (3); the electric push rods (73) are located in the support tube (72), and the telescopic ends of the electric push rods (73) are in contact with the inside of the support tube (72).

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