CN-121993075-A - Spring clip salvaging mechanism, spring clip salvaging inner assembly and rope core drilling tool

CN121993075ACN 121993075 ACN121993075 ACN 121993075ACN-121993075-A

Abstract

The invention discloses a spring clip salvaging mechanism, a spring clip salvaging inner assembly and a rope core drilling tool, which comprises an inner pipe, a spear salvaging mechanism and at least one group of spring clip mechanisms, wherein the inner pipe is internally provided with an inner pipe with an opening at the top, the spear salvaging mechanism can axially reciprocate in the inner pipe, the spring clip mechanisms comprise spring clips and spring pieces, the spring pieces are fixed on the inner wall surface of the inner pipe, in an unfolding state, the tops of the spring clips extend out of a containing groove and can be clamped in a limiting structure on the inner wall of an outer pipe assembly so as to limit the axial movement of the inner pipe relative to the outer pipe assembly, in a folding state, the spring clips are folded into the containing groove, and the inner pipe can axially move in the outer pipe assembly, and the spear salvaging mechanism is arranged to apply pressure on the inner side wall of the spring clips and enable the spring clips to overcome the pressure of the spring clips to change from the unfolding state to the folding state, so that the reliability and the working efficiency of the rope core drilling operation can be improved.

Inventors

QI LIQIANG
JIANG CHUNXIAO
WANG LINQING
WANG YUEWEI
WANG YANLI
GAO JIEYUN

Assignees

中国地质科学院勘探技术研究所

Dates

Publication Date: 20260508
Application Date: 20260408

Claims (10)

1. The elastic clamping and fishing mechanism is characterized by comprising a fishing spear mechanism and at least one group of elastic clamping mechanisms, wherein the lower end of the fishing spear mechanism is arranged in an inner pipe and can axially reciprocate in the inner pipe; The spring clamping mechanism comprises a spring clamping plate and a spring leaf, wherein the side wall of the inner tube is provided with a containing groove communicated with the inside and the outside of the inner tube, the spring leaf is used for being fixed on the inner wall surface of the inner tube, the spring clamping plate is used for being movably connected with the inner tube, the spring clamping plate is provided with a unfolding state and a folding state, in the unfolding state, the top of the spring clamping plate stretches out of the containing groove and can be clamped in a limiting structure on the inner wall of the outer tube assembly so as to limit the axial movement of the inner tube relative to the outer tube assembly, in the folding state, the spring clamping plate is folded into the containing groove and enables the inner tube to axially move in the outer tube assembly, the spring leaf can apply pressure on the upper edge of the spring clamping plate and enable the spring clamping plate to keep the unfolding state, the spear pulling mechanism is lifted upwards along the axial direction of the inner tube, and the spear pulling mechanism can apply pressure on the inner wall of the spring clamping plate and enable the spring clamping plate to overcome the pressure of the spring leaf to change from the unfolding state to the folding state.
2. The latch-and-pull mechanism of claim 1 wherein said latch-and-pull plate has two opposing side walls with integrally formed spin columns, said receiving slot has two opposing inner wall surfaces with grooves, said spin columns extending into said grooves and being rotatable within said grooves to rotatably connect said latch-and-pull plate with said inner tube.
3. The latch-latch salvaging mechanism as set forth in claim 1, further comprising a fixing block, wherein the spring piece is provided with at least one positioning hole, the fixing block is provided with a positioning protrusion matching with the positioning hole, the fixing block is fixedly connected to the inner tube and compresses the spring piece between the inner wall surface of the inner tube and the fixing block, and the positioning protrusion passes through the corresponding positioning hole to limit the displacement of the spring piece in the length direction of the inner tube.
4. The latch-fishing mechanism of claim 1 or 3, wherein the latch-fishing plate is further fixedly provided with a limiting part, and the limiting part can be abutted against the edge of the accommodating groove on the inner wall of the inner tube so as to limit the maximum outward opening angle of the latch-fishing plate.
5. The latch fishing mechanism according to claim 2, wherein the latch fishing mechanism comprises a fishing spear, a shaft body and an elastic element, wherein at least the lower portion of the shaft body is located in the inner tube, the upper end of the shaft body is connected with the fishing spear, the elastic element is sleeved outside the shaft body and located in the inner tube, an outer protruding extrusion boss and a lower limit boss are sequentially arranged on the lower portion of the shaft body from top to bottom, the wall surface of the inner tube above the lower limit boss is protruding outwards to form an upper limit boss, the upper end of the elastic element is abutted to the lower end face of the upper limit boss, the lower end of the elastic element is abutted to the upper end face of the lower limit boss, the shaft body can be driven to move upwards synchronously by lifting the fishing spear, the extrusion boss presses the inner side wall of the lower end of the latch board so that the latch board rotates around the rotating column to the folded state, and when the fishing spear is lowered, the elastic element can push the shaft body to move downwards to be separated from the reset spring board to the folded state.
6. The latch-fishing mechanism of claim 5, wherein the shaft is rotatable relative to the inner tube about the inner tube axis.
7. The latch-latch fishing mechanism according to claim 6, wherein an end cap is disposed at one end of the inner tube, the end cap covers the top opening of the inner tube, and the lower end of the end cap extends into the inner tube and abuts against the top of the fixing block to limit the fixing block from moving upwards.
8. The latch fishing mechanism according to claim 7, wherein a center hole is formed in the center of the end cover, the fishing spearhead is inserted into the center hole, an inner wall of the center hole is attached to an outer wall of the fishing spearhead, and an axis of the fishing spearhead, an axis of the center hole and an axis of the inner pipe are collinear.
9. An inner bullet card salvaging assembly is characterized by comprising an inner pipe, a core inner pipe and the bullet card salvaging mechanism as set forth in any one of claims 1-8, wherein the lower end of the inner pipe is connected with the upper end of the core inner pipe through a connecting piece.
10. The rope coring drilling tool is characterized by comprising an outer pipe assembly and the elastic clamping salvaging inner assembly according to claim 9, wherein the outer pipe assembly is arranged on the outer sides of the inner pipe and the core inner pipe in a sleeved mode, a limiting structure which is clamped with the elastic clamping plate is arranged on the inner wall of the outer pipe assembly, and the limiting structure is a limiting groove.

Description

Spring clip salvaging mechanism, spring clip salvaging inner assembly and rope core drilling tool Technical Field The invention relates to the technical field of geological exploration, in particular to a spring clip salvaging mechanism, a spring clip salvaging inner assembly and a rope core drilling tool. Background In the conventional rope coring spring clamping and fishing mechanism, the core functional components of the spring clamping mechanism comprise spring clamping plates and expansion springs (expansion springs) which are arranged in pairs, the two spring clamping plates are driven to be outwards expanded and clamped into a spring clamping chamber of an outer assembly by means of radial pre-tightening elasticity provided by the expansion springs, so that axial limiting and circumferential locking of the inner assembly in the drilling process are realized, and during the fishing operation, the fishing mechanism drives the spring clamping plates to overcome the elasticity of the expansion springs to be inwards folded, so that the matched locking with the spring clamping chamber is released, and unlocking and recycling of the inner assembly are completed. In the existing structure, the tension spring adopts a simple assembly mode that hooks at two ends are directly connected to the mounting holes of the elastic clamping plates, no special anti-falling limiting structure is arranged, and the connection reliability of the tension spring and the elastic clamping plates completely depends on the structural strength and the connecting and matching amount of the hooks. The rope coring drilling is mainly applied to deep hard rock and complex broken stratum, a drilling tool continuously bears high-frequency rotary vibration and axial pressurizing alternating impact load in the drilling process, flushing fluid and carried rock powder particles which circulate at high speed in holes can form continuous erosion and abrasion on the connection parts of the expansion springs, in addition, the elastic clamping plates are repeatedly folded and unfolded during the fishing operation, the expansion springs frequently bear compression-rebound alternating stress, fatigue deformation and abrasion reaming are easily caused on the hook parts of the expansion springs, and finally, the matching failure of the hooks and the mounting holes is caused, so that the expansion springs are separated. The spring plate can not maintain a stable open state, can not be reliably meshed with a shifting fork structure of the outer assembly, so that the circumferential positioning failure of the inner assembly is caused, the inner assembly can not synchronously rotate, the torque transmission of a drilling tool is interrupted, the drilling operation can not be normally performed, the fallen spring plate can drop into a runner or a hole bottom in the drilling tool, the runner is extremely easy to be blocked, a salvaging mechanism is blocked, the inner assembly fails to salvage, the core is blocked and worn and broken, the core taking rate is greatly reduced, severe accidents such as bending and breaking of a core and even jamming of the drill are caused when the core taking rate is serious, the spring plate can not maintain a stable open state, reliable meshing can not be formed with a shifting fork structure of the outer assembly, the circumferential positioning failure of the inner assembly is caused, the inner assembly and the outer assembly can not synchronously rotate, the torque transmission of the drilling tool is interrupted, and the drilling operation can not be normally performed, and the fallen spring plate can be easily dropped into the runner or the hole bottom of the drilling tool, the salvage mechanism is extremely easy to cause the blockage of the inner assembly, the whole drilling tool is required to be salvaged, the drilling tool is stopped, the whole drill rod is required to be stopped to be pulled, the non-production operation time is greatly increased, the construction efficiency of deep drilling is seriously reduced, and the drilling operation is remarkably is increased. Disclosure of Invention The invention aims to provide a spring clip salvaging mechanism, a spring clip salvaging inner assembly and a rope core drilling tool, so as to solve the problems in the prior art, ensure that the inner assembly can be smoothly opened or closed when the outer assembly is reliably fixed and salvaged, and further improve the reliability and the working efficiency of rope core drilling operation. In order to achieve the above object, the present invention provides the following solutions: The invention provides a latch salvaging mechanism which comprises a salvaging spear mechanism and at least one group of latch mechanism, wherein the lower end of the salvaging spear mechanism is arranged in an inner pipe and can axially reciprocate in the inner pipe, the latch mechanism comprises a latch plate and a spring piece, a containing groov