CN212359691U - Retractable inner tube assembly structure - Google Patents
Retractable inner tube assembly structure Download PDFInfo
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- CN212359691U CN212359691U CN202020861523.6U CN202020861523U CN212359691U CN 212359691 U CN212359691 U CN 212359691U CN 202020861523 U CN202020861523 U CN 202020861523U CN 212359691 U CN212359691 U CN 212359691U
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- drill bit
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- torque transmission
- inner tube
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Abstract
The utility model relates to a retractable inner tube assembly structure is applied to soft stratum and creeps into, belongs to geological exploration with creeping into technical field. The technical scheme is as follows: the upper part of the torque transmission sleeve (2) is in threaded connection with the elastic clamp assembly, an internal spline (4) is arranged at the opening of a sleeve at the lower part, an external spline (5) is arranged at the upper end of the joint (6), the upper end of the joint (6) is in key connection with the lower end of the torque transmission sleeve, the lower end of the joint is in threaded connection with the upper end of the inner pipe (8), and the lower end of the inner pipe (8) is in threaded connection with an advance; the joint is provided with an axially arranged through hole, the upper part of the transmission torsion bar (7) is arranged in the lower sleeve of the transmission sleeve and sleeved with a spring (3), and the lower part of the transmission torsion bar penetrates through the through hole in the joint. The utility model has the advantages that: the leading drill bit can move up and down along with the joint, so that the leading drill bit is effectively protected from being damaged; the internal spline, the external spline and the torque rod can also effectively offset the reverse force of the advance bit for carving rock stratum, keep the relative movement of the bit and the advance bit and facilitate coring.
Description
Technical Field
The utility model relates to a retractable inner tube assembly structure is applied to soft stratum and creeps into, belongs to geological exploration with creeping into technical field.
Background
With the development of wireline drilling technology, drilling requirements in soft formations are increasing. In the wire core drilling, the upper end of a common inner pipe structure is provided with a spring clip assembly, an inner pipe, a spring seat and the like are connected below the spring clip assembly, the length of the inner pipe assembly is fixed during drilling, an inner drill bit can be designed in advance (the inner drill bit exceeds the drill bit) under the common condition during drilling of a soft stratum, the change hardness of the stratum is changed during drilling construction, the length of the advanced drill bit is fixed and unchanged during stratum change, the size of the received force becomes uncontrollable, and the drill bit is extremely easy to damage, so that the extraction failure of a rock core is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a retractable inner tube assembly structure sets up the inner tube assembly into scalable structure, and then changes the leading drill bit atress condition, avoids leading drill bit to damage, solves the above-mentioned problem among the background art.
The technical scheme of the utility model is that:
a telescopic inner pipe assembly structure comprises a steel pipe, a torque transmission sleeve, a spring, a joint, a torque transmission rod, an inner pipe, a drill bit and an advance drill bit, wherein the steel pipe and the drill bit are both of hollow cylindrical structures and are connected through threads, a cylindrical cavity is formed inside the steel pipe and the drill bit, and the torque transmission sleeve, the joint, the inner pipe and the advance drill bit are sequentially arranged in the cylindrical cavity from top to bottom; the upper part of the torque transmission sleeve is a base with threads, the lower part of the torque transmission sleeve is a sleeve with an opening at the bottom end, the upper part of the torque transmission sleeve is in threaded connection with the elastic clamp assembly, an internal spline is arranged at the opening of the sleeve at the lower part, an external spline is arranged at the upper end of the connector, the upper end of the connector is in key connection with the lower end of the torque transmission sleeve, the lower end of the connector is in threaded connection with the upper end of the inner pipe, and the; the joint is provided with an axially arranged through hole, the upper part of the torque transmission rod is arranged in a lower sleeve of the torque transmission sleeve and sleeved with a spring, and the lower part of the torque transmission rod penetrates through the through hole in the joint; when the spring is in an original state, the leading drill bit exceeds the drill bit; the central lines of the steel pipe, the drill bit, the transmission torsion bar and the inner pipe are coincident.
The upper end of the steel pipe is in threaded connection with the drill string.
The inner tube is a thin-walled hollow tube for accommodating a core.
The drill bit is a diamond drill bit, an alloy drill bit or a PDC drill bit.
The advanced drill bit is a diamond drill bit, an alloy drill bit, a PDC drill bit or a rigid body drill bit.
The spring is replaceable, and after the rock stratum is extracted, the spring and the leading drill bit with different rigidity can be replaced by observing the condition of extracting the rock stratum, so that the rock core can be smoothly carved and extracted next time.
The through hole is a hexagonal hole, and the cross section of the transmission rod is a regular hexagon.
The utility model has the advantages that: the leading drill bit can move up and down along with the joint, so that the leading drill bit is effectively protected from being damaged; the internal spline, the external spline and the torque rod can also effectively offset the reverse force of the advance bit for carving rock stratum, keep the relative movement of the bit and the advance bit and facilitate coring.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: the drilling tool comprises a steel pipe 1, a torque transmission sleeve 2, a spring 3, an internal spline 4, an external spline 5, a joint 6, a torque transmission rod 7, an inner pipe 8, a drill bit 9 and a pilot bit 10.
Detailed Description
The present invention will be further explained by embodiments with reference to the accompanying drawings.
A telescopic inner pipe assembly structure comprises a steel pipe 1, a torque transmission sleeve 2, a spring 3, a joint 6, a torque transmission rod 7, an inner pipe 8, a drill bit 9 and an advance drill bit 10, wherein the steel pipe 1 and the drill bit 9 are both of hollow columnar structures and are connected through threads, a columnar cavity is formed inside the steel pipe 1 and the drill bit 9, and the torque transmission sleeve 2, the joint 6, the inner pipe 8 and the advance drill bit 10 are sequentially arranged in the columnar cavity from top to bottom; the torque transmission sleeve 2 is divided into an upper part and a lower part, the upper part is a base with threads, the lower part is a sleeve with an opening at the bottom end, the upper part of the torque transmission sleeve 2 is in threaded connection with the elastic clamp assembly, an internal spline 4 is arranged at the opening of the sleeve at the lower part, an external spline 5 is arranged at the upper end of the joint 6, the upper end of the joint 6 is in key connection with the lower end of the torque transmission sleeve 2, the lower end of the joint 6 is in threaded connection with the upper end of the inner tube 8, and the; the joint 6 is provided with an axially arranged through hole, the upper part of the torque transmission rod 7 is arranged in a lower sleeve of the torque transmission sleeve 2 and is sleeved with the spring 3, and the lower part of the torque transmission rod 7 penetrates through the through hole on the joint 6; when the spring is in an original state, the leading drill 10 exceeds the drill 9, and the central lines of the steel pipe 1, the drill 9, the torque rod 7 and the inner pipe 8 are superposed.
The upper end of the steel pipe 1 is in threaded connection with a drill string.
The inner tube 8 is a thin-walled hollow tube for receiving a core.
The drill bit 9 is a diamond bit, an alloy bit or a PDC bit.
The advance drill bit 10 is a diamond bit, an alloy bit, a PDC bit, or a rigid body bit.
When the leading drill bit 10 is a rigid drill bit, the lower end of the rigid drill bit is a cone, and no diamond, alloy or composite sheet is arranged on the hardened rigid drill bit.
The through hole is a hexagonal hole, and the cross section of the torque rod 7 is a regular hexagon.
The spring is replaceable, and after the rock stratum is extracted, the spring 3 and the leading drill bit 10 with different rigidity can be replaced by observing the condition of the extracted rock stratum, so that the rock core can be smoothly carved and extracted next time.
The lower end of the joint 6 and the lower end of the torque transmission rod 7 are fixed through bolts. The mating internal and external splines and the torque rod 7 are used to transmit torque and move the lead bit 10 relative to the bit 9.
With reference to fig. 1, the upper base of the torque transmission sleeve 2 is a circular groove with an open upper end, an internal thread is arranged on the wall of the circular groove, the lower part of the torque transmission sleeve 2 is a circular sleeve with an open bottom end, the outer diameters of the circular groove and the circular sleeve are the same, and the central lines of the circular groove and the circular sleeve coincide. The lower end of the circular sleeve is provided with an internal spline 4 in a matching way, the upper end of the joint 6 is provided with an external spline 5, and the upper end of the joint 6 is in key connection with the lower end of the torque transmission sleeve 2. The upper end of the torsion transmission rod 7 is fixed at the central part of the cylinder bottom of the circular sleeve, the lower end of the torsion transmission rod extends out of the circular sleeve and penetrates through the through hole in the joint 6, a spring cavity is formed in the space among the circular sleeve, the joint 6 and the torsion transmission rod 7 and used for placing the spring 3, the spring 3 is sleeved on the torsion transmission rod 7, the upper end of the torsion transmission rod is in contact with the cylinder bottom of the circular sleeve, and the lower end of the torsion transmission rod. When drilling, the leading bit is forced upward to move the joint 6 upward, and the joint 6 is in contact with the spring 3. And the torque transmission sleeve 2 and the torque transmission rod 7 are provided with water passing channels which are communicated with each other and used for returning water.
The utility model discloses a use: when the elastic card assembly is used, the steel pipe 1 drives the drill bit 9 to rotate, and the single-action mechanism on the elastic card assembly drives the torque transmission sleeve 2, the inner pipe 8 and the advance drill bit 10 to rotate in opposite directions. After the initial assembly of the whole mechanism is completed, the advance drill bit 10 exceeds the drill bit 9 by about 10-15mm, when the mechanism is used, the advance drill bit 10 meets rock strata, upward force is applied to drive the inner pipe and the joint to move upwards, the joint is in contact with the spring 3 and compresses the spring, the spring 3 generates downward force, when the downward force and the upward force reach balance, the advance drill bit 10 does not move upwards any more, and a rock core enters the inner pipe 8 along an inner hole of the advance drill bit 10. When the drill bit 10 is suddenly exposed to hard rock during use, the drill bit continues to move upwards until the drill bit is flush with the drill bit 9, so that the drill bit is effectively protected from being damaged. In the process, the internal spline, the external spline and the torque rod 7 can effectively counteract the reverse force of the leading drill bit 10 for cutting rock strata, and the relative movement of the drill bit 9 and the leading drill bit 10 is maintained.
Claims (6)
1. The utility model provides a retractable inner tube assembly structure which characterized in that: the drilling tool comprises a steel pipe (1), a torque transmission sleeve (2), a spring (3), a joint (6), a torque transmission rod (7), an inner pipe (8), a drill bit (9) and an advance drill bit (10), wherein the steel pipe (1) and the drill bit (9) are both of hollow columnar structures, the steel pipe (1) and the drill bit (9) are connected through threads, a columnar cavity is formed inside the steel pipe and the drill bit, and the torque transmission sleeve (2), the joint (6), the inner pipe (8) and the advance drill bit (10) are sequentially arranged in the columnar cavity from top; the torque transmission sleeve (2) is divided into an upper part and a lower part, the upper part is a base with threads, the lower part is a sleeve with an opening at the bottom end, the upper part of the torque transmission sleeve (2) is in threaded connection with the elastic clamp assembly, an internal spline (4) is arranged at the opening of the sleeve at the lower part, an external spline (5) is arranged at the upper end of the joint (6), the upper end of the joint (6) is in key connection with the lower end of the torque transmission sleeve (2), the lower end of the joint (6) is in threaded connection with the upper end of the inner pipe (8), and the; the joint (6) is provided with an axially arranged through hole, the upper part of the torsion transmission rod (7) is arranged in a lower sleeve of the torsion transmission sleeve (2) and sleeved with a spring (3), and the lower part of the torsion transmission rod (7) penetrates through the through hole on the joint (6); when the spring is in an original state, the leading drill bit (10) exceeds the drill bit (9); the central lines of the steel pipe (1), the drill bit (9), the torque rod (7) and the inner pipe (8) are overlapped.
2. The telescoping inner tube assembly structure of claim 1, wherein: the upper end of the steel pipe (1) is in threaded connection with a drill string.
3. The telescoping inner tube assembly structure of claim 1, wherein: the inner pipe (8) is a thin-wall hollow pipe.
4. The telescoping inner tube assembly structure of claim 1, wherein: the drill bit (9) is a diamond drill bit, an alloy drill bit or a PDC drill bit.
5. The telescoping inner tube assembly structure of claim 1, wherein: the advanced drill bit (10) is a diamond drill bit, an alloy drill bit, a PDC drill bit or a rigid body drill bit.
6. The telescoping inner tube assembly structure of claim 1, wherein: the through hole is a hexagonal hole, and the cross section of the transmission torsion bar (7) is in a regular hexagon shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020861523.6U CN212359691U (en) | 2020-05-21 | 2020-05-21 | Retractable inner tube assembly structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020861523.6U CN212359691U (en) | 2020-05-21 | 2020-05-21 | Retractable inner tube assembly structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212359691U true CN212359691U (en) | 2021-01-15 |
Family
ID=74149160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020861523.6U Active CN212359691U (en) | 2020-05-21 | 2020-05-21 | Retractable inner tube assembly structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212359691U (en) |
-
2020
- 2020-05-21 CN CN202020861523.6U patent/CN212359691U/en active Active
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