Mechanical tool face stabilizing device and directional drilling tool

Abstract

The invention discloses a mechanical tool face stabilizing device and a directional drilling tool, and relates to the technical field of geological core drilling, the mechanical tool face stabilizing device comprises an outer pipe, a guide sleeve, a torque pipe and a drilling tool, one end of the torque pipe is used for being connected with a drill rod, the torque pipe is rotatably connected into the outer pipe around a first axis, and the first axis is parallel to the axial direction of the outer pipe; the end, away from the drill rod, of the guide sleeve is axially fixed and circumferentially and rotatably connected with a drilling tool, the drilling tool can rotate around the first axis, a guide groove is obliquely formed in the outer side wall of the guide sleeve, a through hole is formed in the outer pipe, a guide piece penetrates through the through hole, and the end, extending out of the through hole, of the guide piece is fixedly connected with a positioning block. The other end of the guide piece is connected into the guide groove in a sliding mode, and the guide sleeve can slide in the axial direction of the outer pipe. The mechanical tool face stabilizing device and the directional drilling tool can effectively provide a stable tool face for wire-line coring directional drilling.

Description

Technical Field

[0001] The 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] At present, whether it is an engineering exploration hole used for horizontal culvert exploration or a deep exploration hole used for high-precision solid mineral resource exploration, the requirements for drilling trajectory control are getting higher and higher. The drilling trajectory control requires the drill to have a stable tool face. The current directional drilling device is often difficult to provide a stable tool face for the commonly used rope coring process, which has a great impact on engineering hole inspection and mineral exploration. Therefore, there is an urgent need for a device and an apparatus that is closely integrated with the rope coring process, which can provide a stable physical drill tool face for rope coring directional drilling, thereby realizing rope 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 stabilizing device, comprising: an outer tube, a guide sleeve, a torsion tube and a drilling tool, wherein one end of the torsion tube is used to connect 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, and 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 sleeved outside the torsion tube and located inside the outer tube, the end of the guide sleeve away from the drill rod is axially fixed and circumferentially rotatably connected to the drilling tool, and the drilling tool can rotate around the first axis, a guide groove is obliquely arranged on the outer side wall of the guide sleeve, one end of the guide groove close 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, a through hole is arranged on the outer tube, a guide member is penetrated in the through hole, one end of the guide member extending out of the through hole is fixedly connected to a positioning block, the other end of the guide member is slidably connected to the guide groove, and the guide sleeve can slide along the axial direction of the outer tube.

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

[0007] In some embodiments, the drill tool is also capable of axially moving relative to the torque tube, and further includes a sliding sleeve, wherein 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; and further includes a push sleeve, one end of which 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 arranged 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 arranged 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 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.

[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 disposed 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 device and the above-mentioned tool face stabilizing device, wherein the power output end of the power device is connected to an 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 stabilizing device and directional drilling tool provided by the present invention, during the directional drilling process, the drill rod drives the torsion tube to rotate, and the torsion tube drives the drill tool to rotate, so that the drill tool can contact the bottom of the hole and perform drilling. Moreover, since the bottom surface of the drill tool contacts the bottom of the borehole, the drill tool moves up and drives the guide sleeve to move up, 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 makes the guide member close to the outer tube, and makes the positioning block move away from the outer tube to contact the hole wall. At this time, the state of the entire drilling tool is: the outer tube is fixed in the radial direction of the borehole, and the drill tool rotates relative to the outer tube and performs drilling. In this way, the tool face is fixed during drilling, and the instability of the tool face is prevented from affecting the 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 drawings required for use in the embodiments will be briefly introduced below. 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 creative work.

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

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

[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 is a 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 piece; 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 be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work 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] Embodiment 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, 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, the torsion tube 3 is rotatably 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 outside 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 rotatably connected to 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 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 a 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 penetrated in 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 away from the hole wall under the action of external force. At this time, the drilling tool can move downward along the borehole; during the directional drilling process, the drill pipe drives the torsion tube 3 to rotate. The twist tube 3 rotates, and the twist tube 3 drives the drill tool to rotate, so that the drill tool can contact the bottom of the hole and drill. Moreover, because the bottom surface of the drill tool 4 contacts the bottom of the borehole, the drill tool 4 moves up and drives the guide sleeve 2 to move up. 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 and makes the positioning block 17 move away from the outer tube 1 to contact the hole wall. At this time, the state of the entire drilling tool is: 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 and drills. In this way, the stability of the tool surface during drilling is ensured, and the instability of the tool surface is prevented from affecting the rope coring directional drilling.

[0032] In some embodiments, a plurality of guide grooves 21, guide members 16 and positioning blocks 17 are provided, and each guide groove 21 is sequentially arranged at equal intervals along the circumference of the guide sleeve 2, and a guide member 16 is provided in each guide groove 21, and a positioning block 17 is fixedly connected to each guide member 16. The guide grooves 21 are sequentially arranged at equal intervals along the circumference of the guide sleeve 2, and the positioning blocks 17 corresponding to the guide grooves 21 are sequentially arranged at equal intervals along the circumference of the outer tube 1, so that the drilling tool 4 can be kept 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. It also includes a sliding sleeve 5, 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, the other end of the push sleeve 6 is connected to the guide sleeve 2 to form a rotational connection around the axis of the guide sleeve, the guide sleeve 2 is provided with an annular groove 25 extending circumferentially along the guide sleeve 2, the push sleeve 6 is provided with a first annular flange 61 extending circumferentially along the push sleeve 6, the first annular flange 61 is arranged in the annular groove 25, and the other end of the push sleeve 6 is connected to the guide sleeve 2 to form a rotational connection around the first axis.

[0035] When drilling, the drill tool 4 moves downward relative to the outer tube 1, driving the sliding sleeve 5 and the push sleeve 6 downward, and the guide sleeve 2 downward, so that the positioning block 17 can be away from the hole wall; when directional drilling, the drill tool 4 moves upward relative to the outer tube 1, driving the sliding sleeve 5 upward, and the sliding sleeve 5 drives the push sleeve 6 upward, and at the same time, the torsion tube 3 rotates under the drive of the drill rod, driving the sliding sleeve 5 to rotate, and the drill bit 41 rotates to achieve drilling. By providing the sliding sleeve 5 and the push sleeve 6, and providing the annular flange and the annular groove 25, the rotation connection between the drill tool 4 and the guide sleeve 2 around the first axis and the sliding connection between the drill tool 4 and the torsion tube 3 are realized, so that the drill tool 4 can not only rotate around the first axis for directional drilling, but also drive the guide sleeve 2 to move during the 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 close to the drilling tool 4 is the limiting end, the limiting end is detachably connected to one end of the limiting sleeve 24, the cross-sectional dimension of the limiting tube 23 in the direction perpendicular to the axial direction of the outer tube 1 is larger than that of the limiting sleeve 24, the outer side of the limiting sleeve 24 is provided with a second annular flange 26, and an annular groove 25 is formed between the second annular flange 26 and the end face of the limiting end. The limiting end is detachably connected to the limiting sleeve 24, so that the disassembly and assembly between the limiting tube 23 and the limiting sleeve 24 is more convenient. Among them, the limiting end and the limiting sleeve 24 are threadedly connected.

[0037] In some embodiments, limiting protrusions 22 are provided on two opposite side walls of the guide groove 21, and the side of the limiting protrusion 22 facing the bottom surface of the guide groove 21 is a first limiting surface 221, and 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 that are arranged opposite to each other, and 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 moves 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 rotatably connected to the connecting tube 12 via the 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. When directional drilling is performed, the torsion tube 3 is connected to the drill rod, and the rotation of the drill rod drives the rotation of the torsion tube 3, and causes 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 drilling tool 4, a lower bearing 8 is disposed in the bearing tube 14, an outer ring of the lower bearing 8 is fixedly connected to the inner side wall of the bearing tube 14, and an inner ring of the lower bearing 8 contacts the outer side wall of the drilling tool 4. The lower bearing 8 can limit the drilling tool 4 in the radial direction of the outer tube 1 to prevent the drilling 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 side wall of the outer tube 1, and the positioning block 17 includes a sliding portion and a supporting portion, the sliding portion is slidably connected in the slot 18, the supporting portion is fixedly connected to a side of the sliding portion close to the slot 18, the supporting portion extends out of the slot 18, the cross-sectional size and shape of the sliding portion are the same as those of the slot 18, and the through hole is provided at the bottom of the slot 18. The slot 18 can limit the positioning block 17 in the axial direction and circumferential direction 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, so that the sliding sleeve 5 can slide along the axial direction of the torsion tube 3 and cannot rotate around its own axial direction relative to the torsion tube 3.

[0043] Embodiment 2

[0044] This embodiment provides a directional drilling tool, comprising: a power device and the tool face stabilizing device in the first embodiment, wherein the power output end of the power device is connected to an 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 used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood 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 and a drilling tool, wherein one end of the torsion tube is used to connect 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 around a first axis, 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 away from the drill rod is axially fixed and circumferentially rotatably connected to the drilling tool, and the drilling tool can rotate around the first axis, a guide groove is obliquely arranged on the outer side wall of the guide sleeve, the end of the guide groove close to the drilling tool is 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 arranged on the outer tube, a guide member is penetrated in the through hole, one end of the guide member extending out of the through hole is fixedly connected to a positioning block, the other end of the guide member is slidably connected to the guide groove, and the guide sleeve can slide along the axial direction of the outer tube.

2. The mechanical tool face stabilization device according to claim 1, characterized in that: There are multiple guide grooves, guide members and positioning blocks. 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 drilling tool can also move axially relative to the torque tube, and also includes a sliding sleeve, the fixed end of the sliding sleeve is fixedly connected to the drilling 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 along the circumference of the guide sleeve, the push sleeve is provided with a first annular flange extending along the circumference of the push sleeve, the first annular flange is arranged 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 rotation connection around the first axis.

4. The mechanical tool face stabilization device according to claim 3, 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 arranged 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.

5. The mechanical tool face stabilization device according to claim 4, characterized in that: Limiting protrusions are arranged 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.

6. The mechanical tool face stabilization device according to claim 3, 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.

7. The mechanical tool face stabilization device according to claim 6, 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.

8. The mechanical tool face stabilization device according to claim 6, characterized in that: The position of the bearing tube corresponds to the position of the drilling tool. A lower bearing is arranged 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.

9. The mechanical tool face stabilization device according to claim 1, characterized in that: 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.

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

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