Mechanical tool face stabilizer and directional drilling tool

Abstract

The present invention discloses a mechanical tool face stabilization device and directional drilling tool, relating to the field of geological core drilling technology. The device comprises an outer tube, a guide sleeve, a torsion tube, and a drill bit. One end of the torsion tube is used to connect to a drill rod. The torsion tube is connected to the outer tube by rotation about a first axis, and the first axis is parallel to the axial direction of the outer tube. The end of the guide sleeve, which is away from the drill rod, is axially fixed and circumferentially connected to the drill bit, and the drill bit can rotate about the first axis. A guide groove is obliquely provided on the outer wall of the guide sleeve. The outer tube is provided with a through hole, and a guide member is passed through the through hole. One end of the guide member extending through the through hole is fixedly connected to a positioning block, and the other end of the guide member is slidably connected to the guide groove. The guide sleeve can slide along the axial direction of the outer tube. The mechanical tool face stabilization device and directional drilling tool can effectively provide a stable tool face for rope coring directional drilling.

Description

Technical Field

[0001] The present invention relates to the technical field of geological core drilling, and in particular to a mechanical tool face stabilizing device and a directional drilling tool. Background Art

[0002] Currently, the requirements for drilling trajectory control are becoming increasingly stringent, whether used in engineering exploration holes for horizontal culvert surveys or deep exploration holes for high-precision solid mineral resource exploration. This requires a stable tool face for the drill. Current directional drilling equipment often struggles to provide a stable tool face for commonly used wireline coring techniques, significantly impacting both engineering exploration and mineral exploration. Therefore, there is an urgent need for a device and apparatus that closely integrates with wireline coring techniques, providing a stable, physical drill tool face for wireline coring directional drilling, and thus enabling wireline coring directional drilling. Summary of the Invention

[0003] The object of the present invention is to provide a mechanical tool face stabilizing device and a directional drilling tool to solve the problems existing in the above-mentioned prior art and to effectively stabilize the tool face of the drilling tool.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a mechanical tool face stabilization device, comprising: an outer tube, a guide sleeve, a torsion tube, and a drilling tool. One end of the torsion tube is used to connect to a drill rod, and the other end of the torsion tube is circumferentially fixedly connected to the drilling tool. A drill bit of the drilling tool extends out of the outer tube. The torsion tube is rotatably connected to the outer tube about a first axis, wherein the first axis is parallel to the axial direction of the outer tube. The guide sleeve is sleeved outside the torsion tube and located inside the outer tube. The end of the guide sleeve remote from the drill rod is axially fixed and circumferentially connected to the drilling tool, and the drilling tool is rotatable about the first axis. A guide groove is obliquely provided on the outer wall of the guide sleeve. The end of the guide groove proximate to the drilling tool is a first end, and the other end is a second end. The first end is closer to the outer tube than the second end in a direction perpendicular to the axis of the outer tube. The outer tube is provided with a through hole. A guide member is passed through the through hole. The end of the guide member extending out of the through hole is fixedly connected to a positioning block, and the other end of the guide member is slidably connected to the guide groove. The guide sleeve is slidable along the axial direction of the outer tube.

[0006] In some embodiments, there are multiple guide grooves, guide members and positioning blocks, and the guide grooves are arranged in sequence at equal intervals along the circumference of the guide sleeve. The guide members are arranged in each guide groove, and each guide member is fixedly connected to a positioning block.

[0007] In some embodiments, the drill tool can also move axially relative to the torque tube, and further includes a sliding sleeve, the fixed end of the sliding sleeve is fixedly connected to the drill tool, and the movable end of the sliding sleeve forms a circumferentially fixed and axially movable connection with the end of the torque tube away from the drill rod; it also includes a push sleeve, one end of the push sleeve is fixedly connected to the fixed end, the guide sleeve is provided with an annular groove extending circumferentially along the guide sleeve, the push sleeve is provided with a first annular flange extending circumferentially along the push sleeve, the first annular flange is provided in the annular groove, and the other end of the push sleeve is connected to the guide sleeve through the first annular flange and the annular groove to form a rotational connection around the first axis.

[0008] In some embodiments, the guide sleeve includes a limiting tube and a limiting sleeve, the guide groove is arranged on the limiting tube, the end of the limiting tube close to the drilling tool is the limiting end, the limiting end is detachably connected to one end of the limiting sleeve, the cross-sectional dimension of the limiting tube in a direction perpendicular to the axial direction of the outer tube is larger than that of the limiting sleeve, and a second annular flange is provided on the outer side of the limiting sleeve, and the annular groove is formed between the second annular flange and the end face of the limiting end.

[0009] In some embodiments, limiting protrusions are provided on two opposite side walls of the guide groove, and the side of the limiting protrusion facing the bottom surface of the guide groove is a first limiting surface, and the first limiting surface is parallel to the bottom surface of the guide groove. The guide member has a second limiting surface and a third limiting surface arranged in opposite directions, and the first limiting surface is in contact with the second limiting surface, and the third limiting surface is in contact with the bottom surface of the guide groove.

[0010] In some embodiments, the outer tube includes an upper joint, a connecting tube, a middle joint, a bearing tube and a lower joint, one end of the upper joint is threadedly connected to one end of the connecting tube, the other end of the connecting tube is threadedly connected to one end of the middle joint, the other end of the middle joint is threadedly connected to one end of the bearing tube, and one end of the lower joint is threadedly connected to one end of the bearing tube.

[0011] In some embodiments, the torsion tube is rotationally connected to the connecting tube via an upper bearing, the outer ring of the upper bearing is fixedly connected to the inner wall of the connecting tube, and the inner ring of the upper bearing is sleeved and fixedly connected to the outside of the torsion tube.

[0012] In some embodiments, the position of the bearing tube corresponds to the position of the drill tool, a lower bearing is provided in the bearing tube, an outer ring of the lower bearing is fixedly connected to the inner wall of the bearing tube, and an inner ring of the lower bearing contacts the outer wall of the drill tool.

[0013] In some embodiments, a slot extending perpendicular to the axial direction of the outer tube is provided on the side wall of the outer tube, and the positioning block includes a sliding portion and a supporting portion, the sliding portion is slidably connected in the slot, the supporting portion is fixedly connected to a side of the sliding portion close to the slot, the supporting portion extends out of the slot, and the cross-sectional size and shape of the sliding portion are the same as those of the slot.

[0014] The present invention also provides a directional drilling tool, comprising: a power unit and the above-mentioned tool face stabilizing device, wherein the power output end of the power unit is connected to the end of the torque tube away from the drill bit.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] The mechanical tool face stabilization device and directional drilling tool provided by the present invention, during directional drilling, the drill rod drives the torsion tube to rotate, which in turn drives the drill tool to rotate, allowing the drill tool to contact the hole bottom and perform drilling. Furthermore, because the bottom surface of the drill tool contacts the bottom of the borehole, the drill tool moves upward, driving the guide sleeve upward. The guide member moves relative to the guide groove and moves to the first end of the guide groove. The bottom surface of the guide groove causes the guide member to approach the outer tube and causes the positioning block to move away from the outer tube to contact the hole wall. At this point, the entire drilling tool is in the state of: the outer tube is fixed in the radial direction of the borehole, and the drill tool rotates relative to the outer tube to perform drilling. This ensures the stability of the tool face during drilling and prevents tool face instability from affecting directional drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A cross-sectional view of the mechanical tool face stabilization device provided by the present invention during directional drilling;

[0019] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0020] Figure 3 A cross-sectional view of the mechanical tool face stabilization device provided by the present invention when drilling;

[0021] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

[0022] Figure 5 for Figure 3A partial enlarged view of point C in the middle;

[0023] Figure 6 It is the front view of the guide sleeve;

[0024] Figure 7 is a front view of the guide member;

[0025] In the figure: 1. outer tube; 11. upper joint; 12. connecting tube; 13. middle joint; 14. bearing tube; 15. lower joint; 16. guide member; 161. second limiting surface; 162. third limiting surface; 17. positioning block; 18. notch; 2. guide sleeve; 21. guide groove; 22. limiting protrusion; 221. first limiting surface; 23. limiting tube; 24. limiting sleeve; 25. annular groove; 26. second annular flange; 3. torque tube; 4. drilling tool; 41. drill bit; 5. sliding sleeve; 6. pushing sleeve; 61. first annular flange; 7. upper bearing; 8. lower bearing. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The purpose of the present invention is to provide a mechanical tool face stabilizing device and a directional drilling tool to solve the problems existing in the above-mentioned prior art and to effectively stabilize the tool face of the drilling tool.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1

[0030] This embodiment provides a mechanical tool face stabilization device, such as Figure 1-7As shown, it includes: an outer tube 1, a guide sleeve 2, a torsion tube 3 and a drilling tool 4, one end of the torsion tube 3 is used to connect the drill rod, and the other end of the torsion tube 3 is circumferentially fixedly connected to the drilling tool 4. The drill bit 41 of the drilling tool 4 extends out of the outer tube 1, and the torsion tube 3 is connected to the outer tube 1 around a first axis. The first axis is parallel to the axial direction of the outer tube 1. The guide sleeve 2 is sleeved on the outside of the torsion tube 3 and is located inside the outer tube 1. The end of the guide sleeve 2 away from the drill rod is axially fixed and circumferentially rotatable with the drilling tool 4, and the drilling tool 4 can rotate around The first axis rotates, and a guide groove 21 is obliquely provided on the outer side wall of the guide sleeve 2. The end of the guide groove 21 close to the drilling tool 4 is the first end, and the other end is the second end. The first end is closer to the outer tube 1 than the second end in the direction perpendicular to the axis of the outer tube 1. A through hole is provided on the outer tube 1, and a guide member 16 is passed through the through hole. One end of the guide member 16 extending out of the through hole is fixedly connected to a positioning block 17, and the other end of the guide member 16 is slidably connected to the guide groove 21, and the guide sleeve 2 can slide along the axial direction of the outer tube 1.

[0031] The mechanical tool face stabilizing device provided in this embodiment has an outer tube 1 for connecting the drill pipe. During the drilling process, the torsion tube 3 is fixedly connected to the drill pipe, and the drilling tool is lowered through the drill pipe. The bottom surface of the drill tool 4 does not contact the bottom of the borehole. The gravity of the drill tool 4 itself causes the guide sleeve 2 to slide downward, and the guide member 16 moves relative to the guide groove 21 and moves to the second end of the guide groove 21. Since the second end is close to the torsion tube 3, the positioning block 17 can be moved away from the hole wall under the action of external force. At this time, the drilling tool can move downward along the borehole; in the process of directional drilling, the drill pipe drives the torsion tube 3 to rotate. The rotation of the torsion tube 3 drives the drill tool, allowing it to contact the bottom of the hole and begin drilling. Furthermore, because the bottom surface of the drill tool 4 contacts the bottom of the borehole, the drill tool 4 moves upward, driving the guide sleeve 2 upward. The guide member 16 moves relative to the guide groove 21 and moves to the first end of the guide groove 21. The bottom surface of the guide groove 21 pushes out the guide member 16, causing the positioning block 17 to move away from the outer tube 1 and contact the hole wall. At this point, the entire drilling tool is in the state of: the outer tube 1 is fixed in the radial direction of the borehole, and the drill tool 4 rotates relative to the outer tube 1 to proceed with drilling. This ensures the stability of the tool face during drilling and prevents an unstable tool face from affecting wireline coring and directional drilling.

[0032] In some embodiments, a plurality of guide grooves 21, guide members 16, and positioning blocks 17 are provided. Each guide groove 21 is arranged at equal intervals along the circumference of the guide sleeve 2. A guide member 16 is disposed within each guide groove 21, and a positioning block 17 is fixedly connected to each guide member 16. The guide grooves 21 are arranged at equal intervals along the circumference of the guide sleeve 2, and the positioning blocks 17 corresponding to the guide grooves 21 are arranged at equal intervals along the circumference of the outer tube 1. This allows the drill tool 4 to remain at the center of the borehole during directional drilling.

[0033] In some embodiments, the drilling tool 4 can also move axially relative to the torsion tube 3. A sliding sleeve 5 is further included, the fixed end of the sliding sleeve 5 is fixedly connected to the drilling tool 4, and the movable end of the sliding sleeve 5 forms a circumferentially fixed and axially movable connection with the end of the torsion tube 3 away from the drill rod.

[0034] In some embodiments, a push sleeve 6 is further included, one end of the push sleeve 6 is fixedly connected to the fixed end, and the other end of the push sleeve 6 forms a rotational connection with the guide sleeve 2 around the axis of the guide sleeve, and the guide sleeve 2 is provided with an annular groove 25 extending along the circumference of the guide sleeve 2, and the push sleeve 6 is provided with a first annular flange 61 extending along the circumference of the push sleeve 6, and the first annular flange 61 is provided in the annular groove 25, and the other end of the push sleeve 6 forms a rotational connection with the guide sleeve 2 around the first axis.

[0035] During lowering, the drill tool 4 moves downward relative to the outer tube 1, driving the sliding sleeve 5 and push sleeve 6 downward, and also causing the guide sleeve 2 to move downward, allowing the positioning block 17 to move away from the hole wall. During directional drilling, the drill tool 4 moves upward relative to the outer tube 1, driving the sliding sleeve 5 upward, which in turn drives the push sleeve 6 upward. Simultaneously, the torsion tube 3 rotates under the drive of the drill rod, driving the sliding sleeve 5 and, consequently, the drill bit 41 to rotate to achieve drilling. By providing the sliding sleeve 5 and push sleeve 6, as well as the annular flange and annular groove 25, a rotational connection about the first axis between the drill tool 4 and the guide sleeve 2, and a sliding connection between the drill tool 4 and the torsion tube 3 are achieved. This allows the drill tool 4 to rotate about the first axis for directional drilling and also to drive the guide sleeve 2 to move during axial movement along the outer tube 1.

[0036] In some embodiments, the guide sleeve 2 includes a limiting tube 23 and a limiting sleeve 24. The guide groove 21 is provided on the limiting tube 23. The end of the limiting tube 23 near the drilling tool 4 is a limiting end, which is detachably connected to one end of the limiting sleeve 24. The cross-sectional dimension of the limiting tube 23 in a direction perpendicular to the axial direction of the outer tube 1 is larger than that of the limiting sleeve 24. The limiting sleeve 24 is provided with a second annular flange 26 on its outer side, forming an annular groove 25 between the second annular flange 26 and the end surface of the limiting end. The limiting end and the limiting sleeve 24 are detachably connected, making assembly and disassembly of the limiting tube 23 and the limiting sleeve 24 more convenient. The limiting end and the limiting sleeve 24 are threaded.

[0037] In some embodiments, limiting protrusions 22 are provided on two opposing side walls of the guide groove 21. The side of the limiting protrusion 22 facing the bottom surface of the guide groove 21 is a first limiting surface 221. The first limiting surface 221 is parallel to the bottom surface of the guide groove 21. The guide member 16 has a second limiting surface 161 and a third limiting surface 162 disposed opposite to each other. The first limiting surface 221 contacts the second limiting surface 161, and the third limiting surface 162 contacts the bottom surface of the guide groove 21. By means of the first limiting surface 221 contacting the second limiting surface 161 and the third limiting surface 162 contacting the bottom surface of the guide groove 21, the position of the guide member 16 is limited, so that the guide member 16 can be retracted when sliding to the second end, and the positioning block 17 is moved in a direction away from the hole wall.

[0038] To facilitate the disassembly of the outer tube 1, in some embodiments, the outer tube 1 includes an upper joint 11, a connecting tube 12, a middle joint 13, a bearing tube 14 and a lower joint 15, one end of the upper joint 11 is threadedly connected to one end of the connecting tube 12, the other end of the connecting tube 12 is threadedly connected to one end of the middle joint 13, the other end of the middle joint 13 is threadedly connected to one end of the bearing tube 14, and one end of the lower joint 15 is threadedly connected to one end of the bearing tube 14.

[0039] In some embodiments, the torsion tube 3 is rotationally connected to the connecting tube 12 via an upper bearing 7. The outer ring of the upper bearing 7 is fixedly connected to the inner wall of the connecting tube 12, and the inner ring of the upper bearing 7 is sleeved and fixedly connected to the outside of the torsion tube 3. During directional drilling, the torsion tube 3 is connected to the drill pipe, and the rotation of the drill pipe drives the rotation of the torsion tube 3, thereby causing the drill bit 41 to rotate relative to the outer tube 1.

[0040] In some embodiments, the position of the bearing tube 14 corresponds to the position of the drill tool 4. A lower bearing 8 is disposed within the bearing tube 14. The outer ring of the lower bearing 8 is fixedly connected to the inner wall of the bearing tube 14, and the inner ring of the lower bearing 8 contacts the outer wall of the drill tool 4. The lower bearing 8 can limit the drill tool 4 in the radial direction of the outer tube 1, preventing the drill tool 4 from shifting.

[0041] In some embodiments, a slot 18 extending perpendicularly to the axial direction of the outer tube 1 is provided on the sidewall of the outer tube 1. The positioning block 17 includes a sliding portion and a supporting portion. The sliding portion is slidably connected within the slot 18, and the supporting portion is fixedly connected to a side of the sliding portion adjacent to the slot 18, extending out of the slot 18. The sliding portion has the same cross-sectional size and shape as the slot 18, and a through hole is provided at the bottom of the slot 18. The slot 18 can limit the positioning block 17 in the axial and circumferential directions of the outer tube 1, thereby improving the stability of the positioning block 17.

[0042] In some embodiments, the sliding sleeve 5 is slidably connected to the torsion tube 3 via a spline. The spline connection between the sliding sleeve 5 and the torsion tube 3 allows the sliding sleeve 5 to slide along the axial direction of the torsion tube 3 but cannot rotate relative to the torsion tube 3 about its own axis.

[0043] Example 2

[0044] This embodiment provides a directional drilling tool, comprising: a power unit and the tool face stabilizing device in the first embodiment, wherein the power output end of the power unit is connected to the end of the torque tube 3 away from the drill bit.

[0045] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A mechanical tool face stabilization device, characterized in that: include: An outer tube, a guide sleeve, a torsion tube, a sliding sleeve, a pushing sleeve and a drilling tool, one end of the torsion tube is used to connect the drill rod, the other end of the torsion tube is circumferentially fixedly connected to the drilling tool, the drill bit of the drilling tool extends out of the outer tube, the torsion tube is rotatably connected to the outer tube around a first axis, the first axis is parallel to the axial direction of the outer tube, the guide sleeve is arranged outside the torsion tube and located inside the outer tube, the guide sleeve is axially fixed at one end away from the drill rod and circumferentially rotatably connected to the drilling tool, and the drilling tool can rotate around the first axis, a guide groove is obliquely provided on the outer side wall of the guide sleeve, the guide groove is close to the end of the drilling tool as the first end, and the other end is the second end, the first end is closer to the outer tube than the second end in a direction perpendicular to the axis of the outer tube, a through hole is provided on the outer tube, the through hole A guide piece is provided inside, and one end of the guide piece extending out of the through hole is fixedly connected to a positioning block, and the other end of the guide piece is slidably connected to the guide groove, and the guide sleeve can slide along the axial direction of the outer tube; the drill tool can also move axially relative to the torsion tube, and the fixed end of the sliding sleeve is fixedly connected to the drill tool, and the movable end of the sliding sleeve forms a circumferentially fixed and axially movable connection with the end of the torsion tube away from the drill rod; one end of the push sleeve is fixedly connected to the fixed end, and the guide sleeve is provided with an annular groove extending along the circumference of the guide sleeve, and the push sleeve is provided with a first annular flange extending along the circumference of the push sleeve, and the first annular flange is provided in the annular groove, and the other end of the push sleeve and the guide sleeve are connected to rotate around the first axis through the first annular flange and the annular groove.

2. The mechanical tool face stabilization device according to claim 1, characterized in that: There are multiple guide grooves, guide members and positioning blocks, and the guide grooves are arranged in sequence at equal intervals along the circumference of the guide sleeve. The guide members are arranged in each guide groove, and each guide member is fixedly connected to a positioning block.

3. The mechanical tool face stabilization device according to claim 2, characterized in that: The guide sleeve includes a limiting tube and a limiting sleeve, the guide groove is arranged on the limiting tube, the end of the limiting tube close to the drilling tool is the limiting end, the limiting end is detachably connected to one end of the limiting sleeve, the cross-sectional dimension of the limiting tube in a direction perpendicular to the axial direction of the outer tube is larger than that of the limiting sleeve, a second annular flange is provided on the outer side of the limiting sleeve, and the annular groove is formed between the second annular flange and the end face of the limiting end.

4. The mechanical tool face stabilization device according to claim 3, characterized in that: Limiting protrusions are provided on the two opposite side walls of the guide groove, and the side of the limiting protrusion facing the bottom surface of the guide groove is a first limiting surface, and the first limiting surface is parallel to the bottom surface of the guide groove. The guide member has a second limiting surface and a third limiting surface arranged opposite to each other, and the first limiting surface is in contact with the second limiting surface, and the third limiting surface is in contact with the bottom surface of the guide groove.

5. The mechanical tool face stabilization device according to claim 2, characterized in that: The outer tube includes an upper joint, a connecting tube, a middle joint, a bearing tube and a lower joint. One end of the upper joint is threadedly connected to one end of the connecting tube, the other end of the connecting tube is threadedly connected to one end of the middle joint, the other end of the middle joint is threadedly connected to one end of the bearing tube, and one end of the lower joint is threadedly connected to one end of the bearing tube.

6. The mechanical tool face stabilization device according to claim 5, characterized in that: The torsion tube is rotatably connected to the connecting tube via an upper bearing. The outer ring of the upper bearing is fixedly connected to the inner wall of the connecting tube, and the inner ring of the upper bearing is sleeved and fixedly connected to the outside of the torsion tube.

7. The mechanical tool face stabilization device according to claim 5, characterized in that: The position of the bearing tube corresponds to the position of the drilling tool. A lower bearing is provided in the bearing tube. The outer ring of the lower bearing is fixedly connected to the inner wall of the bearing tube, and the inner ring of the lower bearing contacts the outer wall of the drilling tool.

8. The mechanical tool face stabilization device according to claim 1, wherein: A slot extending perpendicular to the axial direction of the outer tube is provided on the side wall of the outer tube. The positioning block includes a sliding portion and a supporting portion. The sliding portion is slidably connected in the slot. The supporting portion is fixedly connected to a side of the sliding portion close to the slot. The supporting portion extends out of the slot. The cross-sectional size and shape of the sliding portion are the same as those of the slot.

9. A directional drilling tool, characterized in that: include: A power device and a tool face stabilizing device according to any one of claims 1 to 8, wherein the power output end of the power device is connected to the end of the torque tube away from the drill bit.

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