A ball and socket type wireline coring tool suitable for use with an audio frequency drill

Abstract

The application provides a ball and socket type rope coring drill tool suitable for an audio frequency drilling machine, which comprises an outer pipe assembly for downward drilling and an inner pipe assembly for sampling, the inner pipe is arranged in the hollow inner cavity of the outer pipe, and the top of the inner pipe is provided with a ball and socket mechanism and a fishing spear, the ball and socket mechanism is used for realizing the clamping or separation between the inner pipe assembly and the outer pipe assembly when the inner pipe assembly is moved into position relative to the outer pipe assembly. The whole drill tool has simple structure, high outer pipe thread strength, can achieve waterless drilling, the ball and socket mechanism has accurate positioning, reliable locking and easy unlocking, and the drill tool can improve the comprehensive drilling efficiency and greatly reduce the labor intensity.

Description

TECHNICAL FIELD

[0001] The present application relates to a ball and socket type rope coring drill, in particular to a ball and socket type rope coring drill suitable for an acoustic frequency drilling rig. BACKGROUND

[0002] The acoustic frequency vibration drilling rig has the characteristics of fast drilling speed, good rock and soil sample fidelity, less environmental pollution, good construction safety, wide adaptability to strata, etc., and is widely used in ecological environment geological survey, high-precision geotechnical engineering investigation, water-soluble mineral resource exploration, shallow geothermal well drilling and other fields, and has broad application prospects. When using the acoustic frequency vibration drilling rig to drill, it is found that the traditional single pipe drill tool needs to be frequently raised and lowered with the drill pipe as the hole deepens, resulting in too long auxiliary time, which seriously restricts the drilling efficiency. The rope coring drill has high drilling efficiency, high sampling rate, is conducive to safety in the hole and reduces labor intensity.

[0003] The conventional ball and socket drill tool for mud rotary drilling has a complex structure and low thread strength of the outer pipe, and is not suitable for water-free drilling of the acoustic frequency vibration drilling rig. To solve the above problems, the present application provides a ball and socket type rope coring drill suitable for an acoustic frequency drilling rig. SUMMARY

[0004] In order to solve the problems existing in the prior art, the present application provides a ball and socket type rope coring drill suitable for an acoustic frequency drilling rig, which has a simple overall structure, high thread strength of the outer pipe, can achieve water-free drilling, the ball and socket mechanism has accurate positioning, reliable locking and easy unlocking, and the drill can improve the overall drilling efficiency and greatly reduce the labor intensity, thereby solving the above problems existing in the background art.

[0005] To achieve the above purpose, the present application adopts the following technical solution:

[0006] A ball and socket type rope coring drill suitable for an acoustic frequency drilling rig, comprising an outer pipe assembly for downward drilling and an inner pipe assembly for sampling, the outer pipe assembly comprising an outer pipe having a hollow inner cavity, the inner pipe assembly comprising an inner pipe arranged in the hollow inner cavity of the outer pipe, the inner pipe assembly further comprising a ball and socket mechanism and a fishing spear, the ball and socket mechanism being arranged at the top of the inner pipe for achieving the clamping or separation between the inner pipe assembly and the outer pipe assembly when the inner pipe assembly is moved into position relative to the outer pipe assembly.

[0007] The ball and socket mechanism comprises a steel ball and a ball and socket mechanism body, the ball and socket mechanism body is fixedly connected with the top of the inner pipe, the fishing spear is fixed on the ball and socket mechanism body, the steel ball is arranged in the ball and socket mechanism body and can be retracted in the ball and socket mechanism body when the inner pipe moves up and down, and can be extended out of the outer wall of the ball and socket mechanism body and clamped with the inner wall of the outer pipe when the inner pipe moves into position relative to the outer pipe.

[0008] The ball card mechanism body comprises a spring seat and a ball card chamber, the ball card chamber has a circular inner cavity, a fishing spear and the spring seat are fixed together in the circular inner cavity of the ball card chamber, a spring is arranged between the spring seat and the ball card chamber, the ball card chamber can move up and down relative to the combination of the fishing spear and the spring seat under the action of the spring, a steel ball limiting groove is arranged in the middle of the ball card chamber, a steel ball is arranged in the steel ball limiting groove, the steel ball protrudes from the outer wall of the ball card chamber in the normal state, a steel ball chamber corresponding to the steel ball is arranged on the outer wall of the fishing spear, and the steel ball retracts from the outer wall of the ball card chamber when the ball card chamber moves to the position corresponding to the steel ball limiting groove and the steel ball chamber.

[0009] The steel ball limiting groove is two circular table cavities symmetrically arranged on the side wall of the ball card chamber and penetrating through the side wall of the ball card chamber, the circular table cavities can completely accommodate the steel ball, and the diameter of the circular table cavities gradually decreases from inside to outside, and the diameter at the smallest position is smaller than the diameter of the steel ball.

[0010] The steel ball chamber is an annular groove surrounding the outer wall of the fishing spear, the annular groove gradually increases from inside to outside, and the opening of the annular groove at the largest position can just clamp the steel ball.

[0011] The inner wall of the outer pipe is provided with a positioning ring.

[0012] The outer pipe assembly further comprises a drill pipe joint and an outer pipe drill bit, the drill pipe joint is arranged at the top of the outer pipe, and the outer pipe drill bit is arranged at the bottom of the outer pipe.

[0013] The inner pipe assembly further comprises an inner pipe joint, and the ball card mechanism is connected with the inner pipe through the inner pipe joint.

[0014] The ball card mechanism and the inner pipe joint are provided with air holes penetrating through the ball card mechanism and the inner pipe joint.

[0015] The bottom of the inner pipe is further provided with a claw spring type clamping spring.

[0016] The application has the following technical effects:

[0017] Compared with the prior art, the ball card type rope coring drill tool suitable for the audio frequency vibration drilling machine has the advantages of simple structure, large outer pipe thread strength, stable and reliable ball card mechanism, can significantly improve the comprehensive drilling efficiency and drilling quality, reduce the labor intensity, reduce the drilling cost, and has a wide application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0018] The application will be further described below in combination with the drawings, and the drawings of the application only schematically illustrate and explain the application, and do not limit the scope of the application.

[0019] Figure 1 The cross-sectional view of the drill tool is shown in the drawings.

[0020] Figure 2 For Figure 1 Detail view of ball catch mechanism and fishing spear.

[0021] Wherein:

[0022] 1 - Drill pipe joint, 2 - fishing spear, 3 - steel ball limiting groove, 4 - steel ball, 5 - positioning ring, 6 - steel ball chamber, 7 - ball catch chamber, 8 - spring seat, 9 - spring, 10 - air hole, 11 - inner tube joint, 12 - outer tube, 13 - inner tube, 14 - claw spring type catch spring, 15 - outer tube drill bit, 71 - second annular protrusion, 81 - first annular protrusion. DETAILED DESCRIPTION

[0023] The present application will be described in detail below with specific embodiments, but the scope of protection of the present application is not limited by the specific embodiments.

[0024] As Figure 1 shown, the present application provides a ball catch type rope coring drill tool suitable for an audio frequency drilling machine, which comprises an outer tube assembly for drilling downward and an inner tube assembly for sampling, the outer tube assembly comprises an outer tube 12 with a hollow inner cavity, the inner tube assembly comprises an inner tube 13, the inner tube 13 is arranged in the hollow inner cavity of the outer tube 12, and the inner tube assembly further comprises a ball catch mechanism and a fishing spear 2, the ball catch mechanism is arranged at the top of the inner tube 13 for achieving the clamping or separation between the inner tube assembly and the outer tube assembly when the inner tube assembly moves into position relative to the outer tube assembly, that is, when the outer tube assembly drills downward, the ball catch mechanism clamps the inner tube assembly and the outer tube assembly together, and the inner tube assembly drills synchronously with the outer tube assembly; when it is needed to fish the inner tube assembly out of the outer tube assembly, the ball catch mechanism keeps the inner tube assembly and the outer tube assembly separated, so that the inner tube assembly is not restricted during the ascending or descending process. The fishing spear 2 is arranged on the ball catch mechanism and is used for fishing the inner tube assembly out of the outer tube assembly.

[0025] The ball catch mechanism comprises a ball catch mechanism body and a steel ball 4 arranged in the ball catch mechanism body, the steel ball 4 can extend or retract to both sides from the ball catch mechanism body, and the steel ball 4 keeps retracted in the ball catch mechanism body to keep the separation of the inner tube assembly and the outer tube assembly when the inner tube assembly moves up and down relative to the outer tube assembly, so as not to affect the relative movement of the inner tube assembly and the outer tube assembly; when the inner tube assembly moves into position relative to the outer tube assembly, the steel ball 4 extends out of the ball catch mechanism body and clamps with the inner wall of the outer tube assembly to achieve the clamping of the inner tube assembly and the outer tube assembly.

[0026] The ball clamping mechanism body comprises a spring seat 8 and a ball clamping chamber 7, the bottom of the ball clamping chamber 7 is connected with an inner pipe joint 11 through screw thread, and the bottom of the inner pipe joint 11 is connected with an inner pipe 13 through screw thread. The ball clamping chamber 7 has a circular inner cavity, a fishing spear 2 and the spring seat 8 are arranged in the circular inner cavity of the ball clamping chamber 7 from top to bottom, the fishing spear 2 is used for being connected with a fishing tool when the inner pipe assembly is fished, the fishing spear 2 is connected with the spring seat 8 through screw thread to form a combined body, the bottom of the spring seat 8 outwardly extends a first annular protrusion 81, the middle of the inner wall of the ball clamping chamber 7 inwardly extends a second annular protrusion 71, a spring 9 is arranged between the first annular protrusion 81 and the second annular protrusion 71, the ball clamping chamber 7 can move up and down relative to the combined body formed by the fishing spear 2 and the spring seat 8 under the action of the spring 9, the middle of the ball clamping chamber 7 is provided with a steel ball limiting groove 3, the steel ball limiting groove 3 is two circular table cavities which are symmetrically arranged on the side wall of the ball clamping chamber 7 and penetrate through the side wall of the ball clamping chamber 7, a steel ball 4 is arranged in the circular table cavities, the circular table cavities can completely contain the steel ball 4, the diameter of the circular table cavities gradually decreases from inside to outside, the diameter of the smallest part is smaller than the diameter of the steel ball, the steel ball 4 protrudes from the outer wall of the ball clamping chamber 7 in the steel ball limiting groove 3 in the normal state, the outer wall of the fishing spear 2 is provided with a steel ball chamber 7 corresponding to the steel ball 4, when the ball clamping chamber 7 moves to the position corresponding to the steel ball limiting groove 3 and the steel ball chamber 7, the steel ball 4 is extruded from the steel ball limiting groove 3 into the steel ball chamber 7, so that the steel ball 4 is retracted from the outer wall of the ball clamping chamber 7.

[0027] The steel ball chamber 7 is an annular groove surrounding the outer wall of the fishing spear, the annular groove gradually increases from inside to outside, and the opening of the annular groove is just large enough to clamp the steel ball.

[0028] The inner wall of the outer pipe is provided with a positioning ring 5.

[0029] The outer pipe assembly further comprises a drill rod joint 1 and an outer pipe drill bit 15, the drill rod joint 1 is arranged at the top of the outer pipe 12, the drill rod joint 1 can be threadedly connected with other drill rods to lengthen the length of the outer pipe assembly, and the outer pipe drill bit 15 is arranged at the bottom of the outer pipe 12.

[0030] The ball clamping mechanism and the inner pipe joint are provided with an air hole 10 penetrating through the ball clamping mechanism and the inner pipe joint, the air hole 10 connects the cavities of the upper and lower parts of the ball clamping mechanism and the inner pipe joint, so as to ensure that the inner pipe assembly overcomes the action of air resistance during movement.

[0031] The bottom of the inner pipe 12 is further provided with a claw spring type clamping spring 14 for cutting off a stratum sample.

[0032] The ball clamping type rope coring drill tool suitable for the audio frequency drilling machine has the working principle that:

[0033] (1)Put the inner tube assembly: the ground on the inner tube assembly and outer tube assembly are assembled, put the inner tube assembly, winch wire rope and fishing connected, fishing will be the inner tube assembly and put into the hollow inner cavity of the outer tube assembly, because the ball card room 7 through the inner tube joint 11 and inner tube 13 connected, under the action of gravity of inner tube 13, ball card room 7 relative to fishing spear 2 downward movement, in the process of ball card room 7 downward movement, steel ball limit groove 3 force steel ball 4 down and move to the position of steel ball room 6 when compression steel ball 4 back to steel ball room 6, at this time the ball card room 7 drive spring 9 in compression state, steel ball 4 shrink, the outer diameter of inner tube assembly is less than the inner diameter of outer tube, the inner tube assembly and outer tube assembly between keep separate, the inner tube assembly continues to drop until to stop down;

[0034] (2)Inner tube assembly locking: when the inner tube assembly is put into the positioning ring 5, the ball card room 7 is connected to the positioning ring 5 to stop downward movement, the spring 9 gives the spring seat 8 downward force, the fishing spear 2 follows the spring seat 8 downward, the spring 9 from the compression state back to make the steel ball 4 position and the groove of steel ball room 6 misaligned, the steel ball 4 is pushed out of the steel ball limit groove 3 and the inner wall of the outer tube assembly under the action of external force, the inner tube assembly is in place. Then put the decarburization pipe so that the fishing and the inner tube assembly are separated, and then the inner tube assembly and the outer tube assembly are synchronous to start drilling.

[0035] (3)Fishing inner tube assembly: along the inner cavity of the outer tube assembly down into the fishing, fishing grab the top of fishing spear 2 and pull up, the spring 9 is in compression state when the inner tube assembly is pulled up, the fishing spear 2 slides upward relative to the ball card mechanism and forces the steel ball 4 back to the steel ball room 6, at this time the steel ball 4 is retracted to make the inner tube assembly and the outer tube assembly separate. The whole inner tube assembly moves upward relative to the outer tube assembly, the claw spring type clamp spring 14 holds and pulls off the formation sample, the inner tube assembly is fished to the ground and exits the formation sample, completing a round of sampling, so reciprocating, realize the follow-up sampling.

[0036] The above only for the preferred embodiment of the present application, for the invention is only illustrative, rather than limiting. The professional technical personnel understand that in the spirit and scope defined by the invention claims can be made many changes, modification, even equivalent, but will fall within the scope of the present invention.

Claims

1. A ball-clip type wireline coring tool suitable for acoustic drilling rigs, comprising an outer tube assembly for downward drilling and an inner tube assembly for sampling, wherein the outer tube assembly includes an outer tube having a hollow inner cavity, and the inner tube assembly includes an inner tube disposed within the hollow inner cavity of the outer tube, characterized in that, The inner tube assembly also includes a ball-locking mechanism and a retrieval spear. The ball-locking mechanism is located at the top of the inner tube and is used to achieve the engagement or disengagement between the inner tube assembly and the outer tube assembly when the inner tube assembly moves into place relative to the outer tube assembly. The ball-clamping mechanism includes a steel ball and a ball-clamping mechanism body. The ball-clamping mechanism body is fixedly connected to the top of the inner tube. The retrieval spear is fixed on the ball-clamping mechanism body. The steel ball is set inside the ball-clamping mechanism body and can remain retracted inside the ball-clamping mechanism body when the inner tube moves up and down. When the inner tube moves into position relative to the outer tube, the steel ball extends out of the outer wall of the ball-clamping mechanism body and clamps with the inner wall of the outer tube. The ball-locking mechanism body includes a spring seat and a ball-locking chamber. The ball-locking chamber has a circular inner cavity, in which a retrieval spear and a spring seat are fixed together. A spring is provided between the spring seat and the ball-locking chamber. Under the action of the spring, the ball-locking chamber can move up and down relative to the assembly formed by the retrieval spear and the spring seat. A steel ball limiting groove is provided in the middle of the ball-locking chamber, and a steel ball is provided in the steel ball limiting groove. Under normal conditions, the steel ball protrudes from the steel ball limiting groove out of the outer wall of the ball-locking chamber. A steel ball chamber corresponding to the steel ball is provided on the outer wall of the retrieval spear. When the ball-locking chamber moves to the position where the steel ball limiting groove corresponds to the position of the steel ball chamber, the steel ball retracts from the outer wall of the ball-locking chamber. The steel ball limiting groove consists of two frustum cavities symmetrically arranged on the side wall of the ball clamping chamber and penetrating the side wall of the ball clamping chamber. The frustum cavities can completely accommodate the steel ball. The diameter of the frustum cavities gradually decreases from the inside to the outside, and the smallest diameter is smaller than the diameter of the steel ball. The steel ball chamber is an annular groove surrounding the outer wall of the retrieval spear. The opening of the annular groove gradually increases from the inside to the outside, and the largest opening of the annular groove can just hold the steel ball. The inner tube assembly also includes an inner tube connector, and the ball clamping mechanism is connected to the inner tube through the inner tube connector.

2. The ball-clip type wireline coring tool for acoustic drilling rigs as described in claim 1, characterized in that, A positioning ring is provided on the inner wall of the outer tube.

3. A ball-clip type wireline coring tool suitable for acoustic drilling rigs as described in claim 1, characterized in that, The outer tube assembly also includes a drill pipe joint and an outer tube drill bit. The drill pipe joint is located at the top of the outer tube, and the outer tube drill bit is located at the bottom of the outer tube.

4. A ball-clip type wireline coring tool suitable for acoustic drilling rigs as described in claim 1, characterized in that, The ball clamping mechanism and the inner tube connector are provided with air holes that pass through the ball clamping mechanism and the inner tube connector.

5. A ball-clip type wireline coring tool suitable for acoustic drilling rigs as described in claim 1, characterized in that, The bottom of the inner tube is also equipped with a claw spring type retaining ring.

Images