CN114278243B

CN114278243B - Single-action double-tube core drilling tool capable of being quickly disassembled and assembled

Info

Publication number: CN114278243B
Application number: CN202210213696.0A
Authority: CN
Inventors: 李鑫淼; 梁健; 袁明昕; 尹浩
Original assignee: Institute of Exploration Technology Chinese Academy of Geological Sciences
Current assignee: Institute of Exploration Technology Chinese Academy of Geological Sciences
Priority date: 2022-03-07
Filing date: 2022-03-07
Publication date: 2022-05-13
Anticipated expiration: 2042-03-07
Also published as: CN114278243A

Abstract

The invention discloses a quick-dismounting single-acting double-pipe core drilling tool, and relates to the technical field of core drilling tools; comprises an outer pipe assembly and an inner pipe assembly; the outer pipe assembly comprises a coring bit, a lower reamer, an outer pipe, an upper reamer and a drill rod joint which are sequentially in threaded connection, and an opening facilitating rock debris to enter is formed in the side of the upper part of the drill rod joint; the inner pipe assembly comprises a core breaking mechanism, a core pipe rapid insertion mechanism, a one-way valve mechanism, a single-action mechanism and a rock debris collecting mechanism which are sequentially connected, wherein the rock debris collecting mechanism comprises a drill rod joint with an opening at the side of the upper part; the core breaking mechanism comprises a blocking clamp spring and an elastic inserting clamp spring seat. The quick-dismounting single-acting double-pipe coring drilling tool provided by the invention has the advantages that the operation flow is simplified, the auxiliary time is reduced, the use efficiency of the drilling tool is improved, the drilling efficiency is further improved, and the construction cost is reduced.

Description

Single-action double-tube core drilling tool capable of being quickly disassembled and assembled

Technical Field

The invention relates to the technical field of core drills, in particular to a single-action double-tube core drill capable of being quickly assembled and disassembled.

Background

In order to master underground geological conditions, real and reliable underground rock formation data are generally directly obtained by a drilling and coring mode, a coring drilling tool mainly comprises a single-action double-pipe coring drilling tool and a rope coring drilling tool, and the rope coring drilling tool is actually a special type of single-action double-pipe coring drilling tool.

The wire line core drilling tool is mainly used for geological core drilling and coring at present, the wire line core drilling tool is generally applied to small-caliber drilling construction, the application depth is not too deep, the deepest drill hole implemented by the wire line core drilling process in the world is 5422.7 meters at present, and the depth is 4007.01 meters at home. When large-caliber, deep-hole and extra-deep-hole coring such as scientific drilling, oil drilling, complex stratum drilling and the like are carried out, a single-action double-pipe drilling tool is basically adopted, the obtained core has larger diameter and richer geological data, and the aim of considering both drilling efficiency and core sampling quality is fulfilled.

The single-action double-tube coring drilling tool basically comprises an outer tube assembly and an inner tube assembly, and through years of research, development, practice and optimization improvement, the single-action double-tube coring drilling tool achieves a long-standing progress and plays an important role in a plurality of major projects and key projects. However, the combination of published patents, papers and production practices shows that the operation process of the single-action double-tube core drill is not convenient enough, and the required auxiliary time is long.

Disclosure of Invention

The invention aims to provide a single-acting double-pipe core drilling tool capable of being quickly disassembled and assembled, so as to solve the problems in the prior art, simplify the operation process, reduce the auxiliary time, improve the use efficiency of the drilling tool, further improve the drilling efficiency and reduce the construction cost.

In order to achieve the purpose, the invention provides the following scheme:

the invention provides a quick-dismounting single-acting double-tube coring drilling tool, which comprises an outer tube assembly and an inner tube assembly; the outer pipe assembly comprises a coring bit, a lower reamer, an outer pipe, an upper reamer and a drill rod joint which are sequentially in threaded connection, and an opening facilitating rock debris to enter is formed in the side of the upper part of the drill rod joint; the inner pipe assembly comprises a core breaking mechanism, a core pipe rapid insertion mechanism, a one-way valve mechanism, a single-action mechanism and a rock debris collecting mechanism which are sequentially connected, wherein the rock debris collecting mechanism comprises a drill rod joint with an opening at the side of the upper part; the core breaking mechanism comprises a blocking clamp spring and an elastic splicing clamp spring seat.

Optionally, the core tube fast plugging mechanism includes at least two combined-type plugging half-closed core tubes serially connected by a bidirectional elastic plugging joint; two clamping grooves with annular structures are symmetrically formed in the outer wall of the combined type inserting semi-closed core pipe; one end of the combined type splicing semi-closed core tube set is clamped in an elastic splicing clamp spring seat of the core breaking mechanism, the other end of the combined type splicing semi-closed core tube set is clamped in an elastic splicing mounting head, and one end, far away from the combined type splicing semi-closed core tube set, of the elastic splicing mounting head is fixedly clamped with the one-way valve mechanism; a plurality of clamping jaws are symmetrically arranged at two ends of the bidirectional elastic plug connector, a plurality of clamping jaws are arranged at one end of the elastic plug spring seat connected with the combined plug semi-closed core pipe assembly, and a plurality of clamping jaws are arranged at one end of the elastic plug mounting head connected with the combined plug semi-closed core pipe assembly; the inner side of the clamping jaw is provided with a bulge fixedly clamped with the clamping groove, and the tail end of the outer side of the clamping jaw is provided with a limiting part; the elastic splicing snap spring seat is sleeved with a first spring, the bidirectional elastic splicing joint is sleeved with a second spring, and the elastic splicing mounting head is sleeved with a third spring; one end of the first spring is abutted with a spring positioning part on the elastic splicing jump ring seat, and the other end of the first spring is abutted with a limiting ring sleeved on the elastic splicing jump ring seat; two ends of the second spring are respectively abutted against two limiting rings sleeved on the bidirectional elastic splicing joint; one end of the third spring is abutted with a spring positioning part on the elastic insertion mounting head, and the other end of the third spring is abutted with a limiting ring sleeved on the elastic insertion mounting head; one end of a limiting ring sleeved on the elastic inserting jump ring seat is abutted against a limiting part at the tail end of the outer side of the clamping jaw of the elastic inserting jump ring seat; one end of each of two limiting rings sleeved on the bidirectional elastic plug-in connector is respectively abutted against the limiting part at the tail end of the outer side of each of the two clamping jaws on the bidirectional elastic plug-in connector; one end of a limiting ring sleeved on the elastic insertion mounting head is abutted against a limiting part at the tail end of the outer side of a clamping jaw on the elastic insertion mounting head.

Optionally, the blocking clamp spring comprises an elastic annular opening steel ring with an anti-skid groove arranged inside, the upper end of a groove inside the elastic annular opening steel ring is evenly riveted with a plurality of blocking spring pieces, the lower parts of the blocking spring pieces are fixedly riveted with the groove inside the elastic annular opening steel ring, and the upper parts of the blocking spring pieces are of smooth inward bending structures; the blocking clamp spring is detachably arranged in the elastic inserting clamp spring seat.

Optionally, the check valve mechanism includes a steel ball seat, a single acting joint and a steel ball; the open end of the single-acting joint is fixedly connected with one end, far away from the combined type splicing semi-closed core tube set, of the elastic splicing mounting head through threads, the steel ball seat is fixedly connected in the open end of the single-acting joint through threads, the steel ball is movably arranged at one end, located in the single-acting joint, of the steel ball seat, and a circulation channel is formed in the steel ball seat; the side wall of one end of the single-acting joint, which is positioned outside the elastic insertion mounting head, is provided with two through holes communicated with the circulation channel, and the steel ball can block the circulation between the circulation channel and the through holes; one end of the steel ball seat, which is far away from the steel ball, is fixedly connected with a single-action connecting sleeve, and the single-action connecting sleeve is in threaded connection with the single-action mechanism.

Optionally, the single-acting mechanism comprises a single-acting connecting sleeve fixedly connected with the steel ball seat, the single-acting connecting sleeve is fixedly, hermetically and clamped with a single-acting joint, a mandrel is movably arranged in the single-acting joint in a penetrating manner, and a lower thrust bearing and an upper thrust bearing are respectively arranged at two ends of the mandrel; the lower thrust bearing is positioned in the single-action connecting sleeve, one end of the lower thrust bearing is abutted against the bottom of the single-action joint, and the other end of the lower thrust bearing is connected with the tail end of the mandrel through a fourth spring; one end of the upper thrust bearing is abutted with the top of the single acting joint, and the other end of the upper thrust bearing is abutted with a limiting block at the top of the mandrel through a labyrinth seal structure; the bearing protection sliding sleeve of the labyrinth seal structure can move back and forth along the axial direction of the mandrel.

Optionally, a first flange is annularly arranged on the outer wall of the single-acting joint; the labyrinth seal structure comprises a suspension gasket, one end of the suspension gasket is provided with an opening, and the other end of the suspension gasket is abutted to the limiting block; one end of the bearing protection sliding sleeve is arranged on the first flange in a sliding mode, and the other end of the bearing protection sliding sleeve can be inserted into the opening end of the suspension gasket; and a second flange is annularly arranged on the outer wall of the single-acting joint, and one end of the second flange is abutted to the opening end of the single-acting connecting sleeve.

Optionally, an inner step of an annular structure is fixedly arranged on the inner wall of the bearing protection sliding sleeve, and the inner step is in sealing contact connection with the outer wall of the single acting joint through an O-shaped ring; one end of the upper thrust bearing, which is close to the single-action joint, can be abutted against the upper part of the inner step, and the other end of the upper thrust bearing is fixedly connected with the inner bottom wall of the opening end of the suspension gasket through a gasket sleeved on the mandrel; the other end of the bearing protection sliding sleeve is inserted into the opening end of the suspension gasket, and the part of the other end of the bearing protection sliding sleeve, which is inserted into the opening end of the suspension gasket, is positioned between the inner wall of the suspension gasket and the outer wall of the gasket; a fifth spring is sleeved on the single-acting joint, one end of the fifth spring is abutted with the first flange, and the other end of the fifth spring is abutted with the inner step; two sides of the suspension gasket are clamped on a limiting step on the inner wall of the outer pipe, and the limiting step is positioned at the connecting position of the outer pipe and the upper reamer; one end of the mandrel, which is far away from the single-action connecting sleeve, is connected with a sliding handle through a cylindrical pin.

Optionally, the debris collecting mechanism includes an upper reamer, a drill rod joint and a water isolating sleeve which is hollow inside and has openings at two ends, the water isolating sleeve is located above the mandrel, the outer wall of one end of the water isolating sleeve is in sealing contact with the inner wall of the upper reamer through an O-ring, and the outer wall of the other end of the water isolating sleeve is in sealing contact with the inner wall of the drill rod joint through an O-ring; the rock debris collecting mechanism is used for completing rock debris collection and storage in the core drilling process.

Compared with the prior art, the invention has the following technical effects:

the inner pipe assembly of the invention adopts an integral design. When earth surface coring is carried out after the next drilling, the inner pipe assembly can be completely provided only by unscrewing one connecting thread on the outer pipe, the use of thread dismounting auxiliary time is reduced, the performance of the single-action mechanism can be visually and conveniently checked in each time of drilling, and the problems of core abrasion, core loss and the like caused by single-action failure can be effectively prevented. A quick inserting mechanism is newly designed between the core tube and the elastic inserting clamp spring seat, and an inserting type half-closed core tube is optimally designed. The splicing mechanisms are brand-new designed at the upper end and the lower end of the core tube, so that the operations of dismounting and mounting between the core tube and the elastic splicing jump ring seat, replacement of the core tube and the like are more convenient, and the ground surface coring auxiliary time is effectively reduced; compared with threaded connection, the plugging mechanism is easy to clean even if polluted by rock debris, flushing fluid and the like, and avoids damage and damage caused by the fact that the rock debris and other impurities cannot be thoroughly cleaned in the connecting threads (particularly the female threads) during the disassembly and assembly of the threads; the plugging mechanism has an automatic locking function and high use reliability. Aiming at the easily damaged thrust bearing on the upper part of the single-action mechanism, the sliding type labyrinth sealing mechanism is newly designed, and the quick inspection and protection of the thrust bearing on the upper part are realized. The labyrinth seal of design can prevent effectively that the flush fluid from getting into, and the slidingtype is sealed is convenient for thrust bearing's quick check and bearing grease's filling, simple operation. The upper part of the drilling tool is provided with a rock debris collecting mechanism, so that large-particle rock debris can be effectively collected and quickly and effectively cleaned. The rock debris collecting mechanism can effectively collect large-particle rock debris which cannot return upwards and is generated in the drilling process, repeated grinding is avoided after the rock debris falls to the bottom of a hole, the large-particle rock debris which is collected can be quickly cleaned when coring is conducted every time, the rock debris cannot contaminate and detach the outer pipe connecting thread, the time for cleaning the thread is shortened, and thread damage is effectively avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic view of a single-acting dual-tube core drill according to the present invention;

FIG. 2 is a schematic diagram illustrating an exploded process of the core barrel rapid plugging mechanism of the present invention;

FIG. 3 is a schematic illustration of the core-breaking process of the core-breaking mechanism of the present invention;

FIG. 4 is a schematic view of the check valve mechanism of the present invention during operation;

FIG. 5 is a schematic view of a single-action mechanism quick check operation of the present invention;

FIG. 6 is a schematic view of a drill pipe joint configuration according to the present invention;

FIG. 7 is a schematic partial side view of a tool joint of the present invention;

FIG. 8 is a schematic top view of a tool joint according to the present invention;

FIG. 9 is a schematic exploded view of a first step of the operation of the drilling tool and the operation of the drilling tool;

FIG. 10 is a schematic view of a second step of motion decomposition in the drilling tool operation flow and motion decomposition of the present invention;

FIG. 11 is a schematic exploded view of the surface coring operation during the third step of the drill operation and the motion decomposition according to the present invention;

FIG. 12 is a schematic diagram illustrating the operation of the drilling tool and the disassembly of rock debris cleaning action in the third step of the disassembly of actions;

the device comprises a fast-detachable single-acting double-tube coring drilling tool 100, a coring drill bit 1, an elastic plug-in clamp spring seat 2, a blocking clamp spring 3, a limiting ring 4, a combined plug-in half-closed core barrel 5, a lower reamer 6, an outer pipe 7, a bidirectional elastic plug-in joint 8, an elastic plug-in mounting head 9, a steel ball seat 10, a single-acting connecting sleeve 11, a single-acting joint 12, a mandrel 13, a bearing protection sliding sleeve 14, a gasket 15, a suspension gasket 16, a sliding handle 17, an upper reamer 18, a water separation sleeve 19, a drill rod joint 20, a first spring 21, a second spring 22, a third spring 23, a fourth spring 24, a fifth spring 25, a steel ball 26, a thrust bearing 27, a cylindrical pin 28, an O-shaped ring 29, a rock core 30 and rock debris 31.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide a single-acting double-pipe core drilling tool capable of being quickly assembled and disassembled, so that the problems in the prior art are solved, the operation flow is simplified, the auxiliary time is reduced, the use efficiency of the drilling tool is improved, the drilling efficiency is improved, and the construction cost is reduced.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Referring to fig. 1, the present invention provides a quick-release double-acting double-tube coring drill 100, which includes an outer tube 7 assembly and an inner tube assembly; the outer pipe 7 assembly comprises a coring bit 1, a lower reamer 6, an outer pipe 7, an upper reamer 18 and a drill rod joint 20 which are sequentially in threaded connection, and an opening convenient for rock debris to enter is formed in the side of the upper part of the drill rod joint 20; the inner pipe assembly comprises a core breaking mechanism, a core pipe fast inserting mechanism, a one-way valve mechanism, a single-acting mechanism and a rock debris collecting mechanism which are sequentially connected, the rock debris collecting mechanism comprises a drill rod joint 20 with an opening at the side of the upper part, and the structure of the drill rod joint 20 is as shown in figures 6, 7 and 8. The axial limiting of the inner pipe assembly and the radial limiting of the upper part of the inner pipe assembly are realized by the threaded connection and the size matching of the outer pipe 7 and the upper reamer 18, and the radial limiting of the lower part of the inner pipe assembly is realized by the matching of the coring bit 1 and the elastic splicing jump ring seat 2. The outer tube 7 assembly realizes the purpose of stabilizing the whole set of drilling tool in the drilling process through the lower reamer 6 and the upper reamer 18, and the upper reamer 6 and the lower reamer are combined for use, so that the reduction of the inner diameter of a drilled hole caused by the abrasion of a drill bit can be effectively avoided, and the drilling quality is ensured.

Further preferably, as shown in fig. 2, the core tube fast plugging mechanism comprises at least two combined plugging half core tubes 5 connected in series by a bidirectional elastic plugging joint 8; the outer wall of the combined type inserting half-closed core tube 5 is symmetrically provided with two clamping grooves with annular structures; one end of the combined type splicing half-closed core tube 5 group is clamped in the elastic splicing clamp spring seat 2 of the core breaking mechanism, the other end of the combined type splicing half-closed core tube 5 group is clamped in the elastic splicing mounting head 9, and one end of the elastic splicing mounting head 9, which is far away from the combined type splicing half-closed core tube 5 group, is fixedly clamped with a one-way valve mechanism; a plurality of clamping jaws are symmetrically arranged at two ends of the bidirectional elastic plug-in connector 8, a plurality of clamping jaws are arranged at one end of the elastic plug-in clamp spring seat 2 connected with the combined plug-in semi-closed core pipe 5, and a plurality of clamping jaws are arranged at one end of the elastic plug-in mounting head 9 connected with the combined plug-in semi-closed core pipe 5; the inner side of the clamping jaw is provided with a bulge fixedly clamped with the clamping groove, and the tail end of the outer side of the clamping jaw is provided with a limiting part; the elastic splicing jump ring seat 2 is sleeved with a first spring 21, the bidirectional elastic splicing joint 8 is sleeved with a second spring 22, and the elastic splicing mounting head 9 is sleeved with a third spring 23; one end of the first spring 21 is abutted with the spring positioning part on the elastic splicing jump ring seat 2, and the other end is abutted with the limiting ring 4 sleeved on the elastic splicing jump ring seat 2; two ends of the second spring 22 are respectively abutted against two limit rings 4 sleeved on the bidirectional elastic plug-in connector 8; one end of the third spring 23 is abutted with the spring positioning part on the elastic insertion mounting head 9, and the other end is abutted with the limiting ring 4 sleeved on the elastic insertion mounting head 9; one end of a limiting ring 4 sleeved on the elastic inserting jump ring seat 2 is abutted against a limiting part at the tail end of the outer side of the clamping jaw of the elastic inserting jump ring seat 2; one end of each of two limiting rings 4 sleeved on the bidirectional elastic plug-in connector 8 is respectively abutted against the limiting part at the tail end of the outer side of each of the two clamping jaws on the bidirectional elastic plug-in connector 8; one end of a limit ring sleeved on the elastic insertion mounting head 9 is abutted with a limit part at the tail end of the outer side of the clamping jaw on the elastic insertion mounting head 9. The combined type inserting half-closed core barrel 5 and the elastic inserting clamp spring seat 2, the bidirectional elastic inserting joint 8 and the elastic inserting joint adopt a quick inserting connection mode, under the action of spring elasticity, the limiting ring 4 is pushed to limit elastic inserting clamp spring seats 2, the bidirectional elastic inserting joint 8 and elastic clamping jaws of the elastic inserting joint, the limiting ring 4 is pushed reversely, limitation can be quickly relieved, and quick assembling and disassembling of the combined type inserting half-closed core barrel 5 are completed.

Specifically, the elastic inserting clamp spring seat 2, the bidirectional elastic inserting joint 8 and the elastic inserting mounting head 9 are made of 65Mn, and after reasonable heat treatment and appearance processing, slits are cut in a linear cutting mode to realize inward and outward stretching and rebounding of each clamping jaw. During assembly, radial pressure is applied to enable the clamping jaws to contract inwards, the spring and the limiting ring 4 are installed according to the sequence shown in figure 1, and the spring is installed in a pre-compression mode. Exerting thrust and promoting 4 compression spring of spacing ring, removing the spacing of each jack catch of above-mentioned 3 parts, insert plug-in type half-closed core pipe both ends, release spacing ring 4, at the effect of spring force, promote the spacing of spacing ring 4 and reset, accomplish the spacing of each jack catch, simple operation realizes the quick assembly disassembly of combination formula grafting half-closed core pipe 5.

The combined type inserting and connecting half-closed core pipe 5 is divided into two parts by adopting a linear cutting process, the end part of the combined type inserting and connecting half-closed core pipe 5 is not subjected to linear cutting, and during installation, the combined type inserting and connecting half-closed core pipe 5 formed by combining the two parts achieves a good guiding effect, so that rapid installation is achieved. The two ends of the combined type splicing semi-closed core tube 5 are respectively connected with an elastic splicing clamp spring seat 2, a two-way elastic splicing joint 8 and an elastic splicing installation head 9, the radial limiting of the combined type splicing semi-closed core tube 5 is realized by the inner diameters of the elastic splicing clamp spring seat 2, the two-way elastic splicing joint 8 and the elastic splicing installation head 9, the clamping jaws of the elastic splicing clamp spring seat 2, the two-way elastic splicing joint 8 and the elastic splicing installation head 9 are matched with the clamping grooves at the two ends of the combined type splicing semi-closed core tube 5, and the axial limiting among parts is realized.

The disassembly process is as follows: one hand slides the limiting ring 4 on the elastic splicing jump ring seat 2 leftwards to release the limiting of each clamping jaw of the elastic splicing jump ring seat 2, the other hand holds the lower part of the elastic splicing jump ring seat 2 to keep the relative position of the two hands unchanged, the elastic splicing jump ring seat 2 slides leftwards, the clamping jaws are outwards opened and gradually separated from the clamping groove of the combined splicing half core pipe 5; continuing to slide leftwards until the elastic inserting clamp spring seat 2 is separated from the combined inserting semi-closed core tube 5, sliding a left limiting ring 4 on a bidirectional elastic inserting joint 8 rightwards by one hand to release the limiting of a clamping jaw, pulling out the combined inserting semi-closed core tube 5 leftwards by the other hand, horizontally placing the combined inserting semi-closed core tube 5 along an axial linear cutting plane, and lifting a small part upwards to realize the quick separation of the two parts of the combined inserting semi-closed core tube 5; the same principle realizes the quick disassembly and separation of two parts of another group of combined type inserted half-closed core pipes 5.

As shown in fig. 3, the core breaking mechanism comprises a blocking clamp spring 3 and an elastic inserting clamp spring seat 2; the blocking clamp spring 3 comprises an elastic annular opening steel ring with an anti-skid groove arranged inside, the upper end of a groove in the elastic annular opening steel ring is evenly riveted with a plurality of blocking spring pieces, the lower parts of the blocking spring pieces are fixedly riveted with the groove in the elastic annular opening steel ring, and the upper parts of the blocking spring pieces are of smooth inward bending structures; the blocking clamp spring 3 is detachably arranged in the elastic inserting clamp spring seat 2. The core breaking mechanism completes core breaking operation by matching the elastic plug-in clamp spring seat 2 and the blocking clamp spring 3 with the coring bit 1. The lower steel ring of the blocking clamp spring 3 is made of 65Mn elastic material, the opening is processed, and the upper blocking spring piece is made of elastic material, so that the aim of blocking the block rock core from falling off is fulfilled.

When the core 30 is complete, the elastic annular opening steel ring at the lower part of the blocking clamp spring 3 plays a main role, an anti-slip groove is designed in the steel ring, friction force can be increased, the core 30 is effectively held tightly, and the blocking clamp spring is static relative to the core 30 at the moment; the drill rod and the drilling tool are lifted, the spring is stressed to compress and release the space, the coring drill bit 1 moves upwards, the inner step of the drill bit is in contact with the bottom of the elastic plug-in clamp spring seat 2 to drive the catch spring to contract inwards, the core is clasped and broken, the core breaking tension is provided by the drilling machine, the tension is transmitted to the core 30 through the drill rod, the outer pipe 7 assembly, the coring drill bit 1, the elastic plug-in clamp spring seat 2 and the catch spring, the chamfering taper of the lower part of the elastic plug-in clamp spring seat 2 is consistent with the taper of the inner step of the drill bit, and the stress performance of the elastic plug-in clamp spring seat 2 during core breaking is improved. When the drill is lifted, the elastic annular opening steel ring at the lower part of the blocking clamp spring is always in a state of tightly holding the core, and the core 30 is effectively prevented from falling off.

When the rock core 30 is loosened and broken, the blocking spring piece on the upper portion of the blocking spring plays a main role, and after the loosened and broken stratum rock core penetrates through the pulling spring piece, the blocking spring piece is closed to support the loosened and broken rock core, so that the rock core is prevented from falling off when the drill is lifted.

As shown in fig. 4, the check valve mechanism includes a steel ball seat 10, a single acting joint 12 and a steel ball 26; the open end of the single-acting joint 12 is fixedly threaded at one end of the elastic splicing mounting head 9 far away from the combined splicing half-closed core barrel 5 group, the steel ball seat 10 is fixedly threaded in the open end of the single-acting joint 12, the steel ball 26 is movably arranged at one end of the steel ball seat 10 positioned in the single-acting joint 12, and a circulation channel is arranged in the steel ball seat 10; the side wall of one end of the single acting joint 12, which is positioned outside the elastic splicing mounting head 9, is provided with two through holes communicated with the circulation channel, and the steel ball 26 can block the circulation of the circulation channel and the through holes; one end of the steel ball seat 10 far away from the steel ball 26 is fixedly connected with a single-action connecting sleeve 11, and a single-action mechanism is connected with the inner thread of the single-action connecting sleeve 11. The effect of check valve mechanism mainly includes following three aspects, firstly transfers the drilling tool in-process, and steel ball 26 receives flush fluid thrust rebound, and the check valve is opened, and flush fluid accessible combination formula grafting half closes the inside through check valve and the 11 through-holes of single action adapter sleeve of 5, gets into the annular gap between inner tube assembly and the outward appearance assembly, and upward movement is inside to the drilling rod, alleviates the resistance that the drilling tool was transferred. Secondly, in the core drilling process, the core gradually enters the inside of the combined type inserting semi-closed core tube 5, flushing fluid accumulated on the upper portion of the combined type inserting semi-closed core tube 5 upwards pushes the steel ball 26, the flushing fluid is upwards discharged through the through hole of the single-action connecting sleeve 11, and the resistance of the core entering the tube is reduced. And thirdly, in the process of lifting the drilling tool, the one-way valve mechanism is in a closed state, so that flushing fluid is prevented from entering the combined type inserted semi-closed core pipe 5 to scour, scatter and wash away the drilled core, and the core sampling quality is ensured.

As shown in fig. 5, the single-acting mechanism comprises a single-acting connecting sleeve 11 fixedly connected with the steel ball seat 10, the single-acting connecting sleeve 11 is fixedly and hermetically clamped with a single-acting joint 12, a mandrel 13 movably penetrates through the single-acting joint 12, thrust bearings 27 are respectively installed at two ends of the mandrel 13, and the thrust bearings 27 comprise a lower thrust bearing and an upper thrust bearing; the lower thrust bearing is positioned in the single-action connecting sleeve 11, one end of the lower thrust bearing is abutted against the bottom of the single-action joint 12, and the other end of the lower thrust bearing is connected with the tail end of the mandrel 13 through a fourth spring 24; one end of the upper thrust bearing is abutted with the top of the single acting joint 12, and the other end of the upper thrust bearing is abutted with a limiting block at the top of the mandrel 13 through a labyrinth seal structure; the bearing protection sliding sleeve 14 of the labyrinth structure is capable of reciprocating in the axial direction of the spindle 13. A first flange is annularly arranged on the outer wall of the single-action joint 12; the labyrinth seal structure comprises a suspension gasket 16 with one end opened and the other end abutted with the limiting block; one end of the bearing protection sliding sleeve 14 is slidably arranged on the first flange, and the other end of the bearing protection sliding sleeve can be inserted into the opening end of the suspension gasket 16; and a second flange is annularly arranged on the outer wall of the single-acting joint 12, and one end of the second flange is abutted with the opening end of the single-acting connecting sleeve 11. An inner step of an annular structure is fixedly arranged on the inner wall of the bearing protection sliding sleeve 14, and the inner step is in sealing contact connection with the outer wall of the single acting joint 12 through an O-shaped ring; one end of the upper thrust bearing close to the single-action joint 12 can be abutted against the upper part of the inner step, and the other end of the upper thrust bearing is fixedly connected with the inner bottom wall of the opening end of the suspension gasket 16 through a gasket 15 sleeved on the mandrel 13; the other end of the bearing protection sliding sleeve 14 is inserted into the opening end of the suspension gasket 16 and is positioned between the inner wall of the suspension gasket 16 and the outer wall of the gasket 15; a fifth spring 25 is sleeved on the single acting joint 12, one end of the fifth spring 25 is abutted with the first flange, and the other end of the fifth spring is abutted with the inner step; two sides of the hanging gasket 16 are clamped on a limiting step on the inner wall of the outer tube 7, and the limiting step is positioned at the connecting position of the outer tube 7 and the upper reamer 18; the end of the spindle 13 remote from the single-action connecting sleeve 11 is connected with a sliding handle 17 by means of a cylindrical pin 28. The bearing protection sliding sleeve 14 is matched with the single acting joint 12, the gasket 15, the suspension gasket 16 and the upper thrust bearing by adopting small clearance. The bearing protection sliding sleeve 14 can slide on the single acting joint 12, and labyrinth sealing of the upper thrust bearing is realized under the action of the elastic force of the spring. The lower thrust bearing is fully enclosed and protected by a single-acting connecting sleeve 11.

The single action is realized mainly by a thrust bearing, and the single action connection sleeve 11, the steel ball seat 10, the elastic plug-in mounting head 9, the plug-in type half-closed core tube, the bidirectional elastic plug-in connector 8, the limiting ring 4, the elastic plug-in clamp spring seat 2, the blocking clamp spring and other parts which are connected with the single action connector 12 are realized in the core drilling process, the parts are kept relatively static relative to the core, the abrasion of the blocking clamp spring and the plug-in type half-closed core tube to the core of the core is further reduced, the core sampling quality is improved, and the suspension gasket 16, the gasket, the mandrel 13, the spring, the nut, the spring gasket and the flat gasket rotate together with the outer tube 7. The single-action mechanism has the auxiliary effect that when the core breaking operation is executed, the spring is stressed and compressed, the space is released, and the effective transmission of the core breaking tension between the elastic inserting clamp spring seat 2 and the coring bit 1 is realized.

When drilling in an easily plugged stratum, a core is extremely easy to be blocked with the combined type inserted half-closed core pipe 5, the combined type inserted half-closed core pipe 5 is forced to move upwards by continuing drilling, and the pressure is finally transmitted to a thrust bearing at the upper part of the single-action mechanism; meanwhile, after solid-phase particles contained in the washing liquid enter the bearing, the service life of the bearing can be shortened, so that the upper thrust bearing is the easiest to damage and is the core of the inspection, the lower thrust bearing is low in stress and better in protection, the service life is long generally, and excessive inspection is not needed.

In order to realize effective protection and quick inspection of the upper thrust bearing of the single-action mechanism, the bearing protection sliding sleeve 14 is additionally arranged on the single-action mechanism, the relative position between the bearing protection sliding sleeve 14 and the upper thrust bearing is limited under the action of the elastic force of the spring, and the bearing protection sliding sleeve 14, the single-action joint 12, the gasket, the suspension gasket 16 and the upper thrust bearing are matched by adopting small clearances, so that the single-action performance of the single-action mechanism is not influenced, and the labyrinth sealing of the upper thrust bearing is realized. The main functions include that firstly, flushing liquid is prevented from entering an upper thrust bearing, and the abrasion of the bearing is accelerated; secondly, the upper thrust bearing is convenient to quickly check; and thirdly, the filling and the replacement of the bearing lubricating grease are convenient, and the lubricating grease is effectively prevented from leaking. Bearing protection sliding sleeve 14 outside design has annular groove, holds annular groove, sliding bearing protection sliding sleeve 14 downwards, and the spring further compresses, and upper portion thrust bearing can be bare loudly out fast, and the visual inspection of the bearing of being convenient for and the interpolation of bearing lubricating grease, the back of finishing is operated, and bearing protection sliding sleeve 14 keeps labyrinth seal state under the effect of spring elasticity automatic re-setting.

The debris collecting mechanism comprises an upper reamer 18, a drill rod joint 20 and a water stop sleeve 19 which is hollow inside and has two open ends, the water stop sleeve 19 is positioned above the mandrel 13, the outer wall of one end of the water stop sleeve 19 is in sealing contact connection with the inner wall of the upper reamer 18 through an O-shaped ring 29, and the outer wall of the other end of the water stop sleeve 19 is in sealing contact connection with the inner wall of the drill rod joint 20 through the O-shaped ring 29; the water isolating sleeve 19, the upper reamer 18 and the drill rod connector 20 are sealed through O-rings 29, a channel in the water isolating sleeve 19 is a flushing liquid flow channel, and an internal space formed among the parts is used for collecting and storing rock debris 31. During core drilling, flushing fluid flows into an annular gap between the combined type splicing half-closed core tube 5 and the outer tube 7 through the interior of a drill rod, the drill rod joint 20, a channel in the water-resisting sleeve 19 and the suspension gasket 16, flows up to the annular gap between the outer tube 7 and the hole wall through the bottom of the drill bit, and finally flows to the ground. The design of tool joint 20 upper portion has 4 openings, and the large granule detritus of being convenient for gets into detritus collection mechanism smoothly under the drilling tool gyration effect. Two ends of the water-proof sleeve 19 are sealed through the O-shaped rings 29, so that flushing fluid can smoothly flow to the bottom of the drill bit through the through hole in the water-proof sleeve 19, and meanwhile, the water-proof sleeve 19 plays a role in supporting the rock debris 31. When the rock debris 31 is cleaned, a tool such as a field screwdriver is inserted into the through hole which is exposed at the lower part of the water separation sleeve 19, the water separation sleeve 19 is drawn out downwards, the rock debris 31 is cleaned conveniently, the rock debris 31 cannot pollute the exposed external thread of the upper reamer 18, and the auxiliary time required by thread cleaning is saved.

The invention takes the improvement of the operation efficiency of the drilling tool as the core, and has the following remarkable advantages: the drilling tool inner pipe assembly adopts an integrally-drawn quick-dismounting structural design, so that the efficiency of operation processes such as earth surface coring and drilling tool strict inspection is improved; the rapid plugging and locking structure design of the combined type plugging semi-closed core tube 5 enables the earth surface coring operation to be more convenient, the assembly and disassembly of parts to be more efficient and the use reliability to be high; the optimized design of the single-acting mechanism realizes the effective protection of the easily damaged thrust bearing at the upper part of the single-acting mechanism, and can quickly finish the bearing inspection and the addition of lubricating grease; the rock debris collecting mechanism adopts a plug-in design, and the rock debris cleaning operation is simple and convenient.

The operation flow and the action of the single-action double-tube core drilling tool which is quickly assembled and disassembled are decomposed as follows:

the end of the drill rod joint 20 is connected with a drill rod and a power head of a drilling machine in sequence, and axial drilling pressure and rotary torque are applied through the power head of the drilling machine. After the secondary drilling is finished (under the conditions that the secondary drilling is finished and comprises the conditions that the drilling cannot be continued due to full pipe and core blockage of the plug-in type half-closed core pipe, the drilling is stopped due to other factors and the like), the drill rod and the drilling tool are lifted to the ground surface from the inside of the drill hole, and the ground surface coring and the storage of the drilled core are finished. When the earth surface coring operation is executed, the series of work such as earth surface coring, rock debris cleaning in the rock debris collecting mechanism, single-action mechanism inspection and the like can be completed only by screwing off the connecting thread between the outer tube 7 and the upper reamer 18. The number of the screw threads to be disassembled is small, the used auxiliary time is short, and the efficiency is high. Starting with the single action dual tube coring tool just lifted to the surface, the tool operation steps are detailed as follows:

the first step is as follows: as shown in fig. 9, after the core drill is lifted to the surface by the lifting joint (field assist tool), the connecting thread between the outer tube 7 and the upper reamer 18 is unscrewed, and the core drill is separated into upper and lower parts. The upper part of the drilling tool comprises a drill pipe joint 20, an upper reamer 18 and a water stop sleeve 19, and the rest of the drilling tool is a disassembled lower part. The upper half part is in a suspended state (the upper part of the lifting joint is connected with an elevator, a steel wire rope and the like), and static sealing in a tight fit state is realized among the water-proof sleeve 19, the drill rod joint 20 and the upper reamer 18 through O-rings 29, so that the water-proof sleeve 19 cannot fall off.

The second step is that: as shown in fig. 10, the disassembled bottom half drilling tool is horizontally placed, a tool such as a screwdriver is used on site, the tool is inserted into the through hole exposed from the end of the sliding handle 17, the sliding handle 17 is pulled outwards, enough holding space is released, and the inner pipe assembly (except the waterproof jacket 19) is integrally pulled out and horizontally placed.

The third step: the method comprises the steps of earth surface coring, rock debris cleaning, single action mechanism performance inspection and the like, and all operations are carried out simultaneously.

(1) Center of earth's surface

As shown in fig. 11, the earth's surface coring action is decomposed, based on the pulled-out inner tube assembly (except for the waterproof sleeve 19), one hand slides the limiting ring 4 on the elastic plugging clamp spring seat 2 to the left, the limitation of each clamping jaw of the elastic plugging clamp spring seat 2 is released, the other hand holds the lower part of the elastic plugging clamp spring seat 2, the relative positions of the two hands are kept unchanged, the elastic plugging clamp spring seat 2 slides to the left, the clamping jaws are outwards opened and gradually separated from the clamping grooves of the combined plugging semi-closed rock core tube 5, the inner tube assembly except for the elastic plugging clamp spring seat 2 is kept at a certain angle with the ground, the rock core slides out of the tube by lightly tapping, and the earth's surface coring is completed.

If the rock core can not slide out smoothly under the action of the jarring, the fact that the rock core is stuck to the inner wall of the combined type inserting semi-closed rock core pipe 5 is shown, at the moment, one hand slides the left limiting ring 4 on the bidirectional elastic inserting joint 8 rightwards to remove the limiting of the clamping jaw, the other hand pulls out the combined type inserting semi-closed rock core pipe 5 leftwards, the combined type inserting semi-closed rock core pipe 5 is horizontally placed along an axial linear cutting plane (a small block part faces upwards), the small block part is lifted upwards, the two parts of the combined type inserting semi-closed rock core pipe 5 are separated quickly, and earth surface coring is completed. The quick disassembly and separation of the two parts of the other group of combined type splicing semi-closed core pipes 5 are realized by the same principle, and the earth surface coring is completed.

(2) Cleaning rock debris

As shown in fig. 12, the rock debris cleaning operation is disassembled, and a tool such as a screwdriver is inserted into the exposed through hole of the water isolation sleeve 19 on site to pull the water isolation sleeve 19 out of the upper reamer 18, clean the collected large rock debris, check the abrasion of the O-ring 29, and replace the rock debris in time.

(3) Single action mechanism performance check

The inspection of the single-acting mechanism mainly comprises the inspection of the upper thrust bearing, the annular groove on the outer side of the bearing protection sliding sleeve 14 is held by a hand, the sliding sleeve 14 is protected by a downward sliding bearing, a spring is stressed and compressed, the upper thrust bearing is completely exposed, the abrasion condition of the thrust bearing and the rotation performance of the single-acting mechanism are quickly inspected, and bearing lubricating grease is added. After the operation is finished, the bearing protection sliding sleeve 14 is reset under the action of the spring force.

The fourth step: part replacement

And (3) reversely and quickly resetting all parts according to the disassembly sequence, sending the inner pipe assembly (except the waterproof sleeve 19) into the disassembled outer pipe 7, tightening connecting threads between the outer pipe 7 and the upper reamer 18, connecting the core drill with the drill rod after the core drill is assembled, putting the core drill to the bottom of the hole, and starting the next core drilling.

In the description of the present invention, it should be noted that the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims

1. The utility model provides a quick assembly disassembly's single action double-barrelled coring drilling tool which characterized in that: comprises an outer pipe assembly and an inner pipe assembly; the outer pipe assembly comprises a coring bit, a lower reamer, an outer pipe, an upper reamer and a drill rod joint which are sequentially in threaded connection, and an opening facilitating rock debris to enter is formed in the side of the upper part of the drill rod joint; the inner pipe assembly comprises a core breaking mechanism, a core pipe rapid insertion mechanism, a one-way valve mechanism, a single-action mechanism and a rock debris collecting mechanism which are sequentially connected, wherein the rock debris collecting mechanism comprises a drill rod joint with an opening at the side of the upper part; the core breaking mechanism comprises a blocking clamp spring and an elastic splicing clamp spring seat; the core tube rapid inserting mechanism comprises at least two combined inserting semi-closed core tubes which are connected in series through a bidirectional elastic inserting connector; two clamping grooves with annular structures are symmetrically formed in the outer wall of the combined type inserting semi-closed core pipe; one end of the combined type splicing semi-closed core tube set is clamped in an elastic splicing clamp spring seat of the core breaking mechanism, the other end of the combined type splicing semi-closed core tube set is clamped in an elastic splicing mounting head, and one end, far away from the combined type splicing semi-closed core tube set, of the elastic splicing mounting head is fixedly clamped with the one-way valve mechanism; a plurality of clamping jaws are symmetrically arranged at two ends of the bidirectional elastic plug connector, a plurality of clamping jaws are arranged at one end of the elastic plug spring seat connected with the combined plug semi-closed core pipe assembly, and a plurality of clamping jaws are arranged at one end of the elastic plug mounting head connected with the combined plug semi-closed core pipe assembly; the inner side of the clamping jaw is provided with a bulge fixedly clamped with the clamping groove, and the tail end of the outer side of the clamping jaw is provided with a limiting part; the elastic splicing snap spring seat is sleeved with a first spring, the bidirectional elastic splicing joint is sleeved with a second spring, and the elastic splicing mounting head is sleeved with a third spring; one end of the first spring is abutted with a spring positioning part on the elastic splicing jump ring seat, and the other end of the first spring is abutted with a limiting ring sleeved on the elastic splicing jump ring seat; two ends of the second spring are respectively abutted against two limiting rings sleeved on the bidirectional elastic splicing joint; one end of the third spring is abutted with a spring positioning part on the elastic insertion mounting head, and the other end of the third spring is abutted with a limiting ring sleeved on the elastic insertion mounting head; one end of a limiting ring sleeved on the elastic inserting jump ring seat is abutted against a limiting part at the tail end of the outer side of the clamping jaw of the elastic inserting jump ring seat; one end of each of two limiting rings sleeved on the bidirectional elastic plug-in connector is respectively abutted against the limiting part at the tail end of the outer side of each of the two clamping jaws on the bidirectional elastic plug-in connector; one end of a limiting ring sleeved on the elastic insertion mounting head is abutted against a limiting part at the tail end of the outer side of a clamping jaw on the elastic insertion mounting head; the blocking clamp spring comprises an elastic annular opening steel ring with an anti-skidding groove formed in the inner part, a plurality of blocking spring pieces are evenly riveted at the upper end of a groove in the elastic annular opening steel ring, the lower parts of the blocking spring pieces are fixedly riveted with the groove in the elastic annular opening steel ring, and the upper parts of the blocking spring pieces are of smooth inward bending structures; the blocking clamp spring is detachably arranged in the elastic inserting clamp spring seat; the one-way valve mechanism comprises a steel ball seat, a single-acting joint and a steel ball; the open end of the single movable joint is fixedly connected with one end of the elastic inserting mounting head far away from the combined inserting semi-closed core tube set in a threaded manner, the steel ball seat is fixedly connected in the open end of the single movable joint in a threaded manner, the steel ball is movably arranged at one end of the steel ball seat in the single movable joint, and a circulation channel is formed in the steel ball seat; the side wall of one end of the single-acting joint, which is positioned outside the elastic insertion mounting head, is provided with two through holes communicated with the circulation channel, and the steel ball can block the circulation between the circulation channel and the through holes; one end of the steel ball seat, which is far away from the steel ball, is fixedly connected with a single-action connecting sleeve, and the single-action mechanism is connected with the single-action connecting sleeve through an internal thread; the single-action mechanism comprises a single-action connecting sleeve fixedly connected with the steel ball seat, the single-action connecting sleeve is fixedly, hermetically and clamped with a single-action joint, a mandrel is movably arranged in the single-action joint in a penetrating manner, and a lower thrust bearing and an upper thrust bearing are respectively arranged at two ends of the mandrel; the lower thrust bearing is positioned in the single-action connecting sleeve, one end of the lower thrust bearing is abutted against the bottom of the single-action joint, and the other end of the lower thrust bearing is connected with the tail end of the mandrel through a fourth spring; one end of the upper thrust bearing is abutted with the top of the single acting joint, and the other end of the upper thrust bearing is abutted with a limiting block at the top of the mandrel through a labyrinth seal structure; the bearing protection sliding sleeve of the labyrinth seal structure can move back and forth along the axial direction of the mandrel; a first flange is annularly arranged on the outer wall of the single-action joint; the labyrinth seal structure comprises a suspension gasket, one end of the suspension gasket is provided with an opening, and the other end of the suspension gasket is abutted to the limiting block; one end of the bearing protection sliding sleeve is arranged on the first flange in a sliding mode, and the other end of the bearing protection sliding sleeve can be inserted into the opening end of the suspension gasket; a second flange is annularly arranged on the outer wall of the single-acting joint, and one end of the second flange is abutted to the opening end of the single-acting connecting sleeve; an inner step of an annular structure is fixedly arranged on the inner wall of the bearing protection sliding sleeve, and the inner step is in sealing contact connection with the outer wall of the single acting joint through an O-shaped ring; one end of the upper thrust bearing, which is close to the single-action joint, can be abutted against the upper part of the inner step, and the other end of the upper thrust bearing is fixedly connected with the inner bottom wall of the opening end of the suspension gasket through a gasket sleeved on the mandrel; the other end of the bearing protection sliding sleeve is inserted into the opening end of the suspension gasket, and the part of the other end of the bearing protection sliding sleeve, which is inserted into the opening end of the suspension gasket, is positioned between the inner wall of the suspension gasket and the outer wall of the gasket; a fifth spring is sleeved on the single-acting joint, one end of the fifth spring is abutted with the first flange, and the other end of the fifth spring is abutted with the inner step; two sides of the suspension gasket are clamped on a limiting step on the inner wall of the outer pipe, and the limiting step is positioned at the connecting position of the outer pipe and the upper reamer; one end of the mandrel, which is far away from the single-action connecting sleeve, is connected with a sliding handle through a cylindrical pin; the rock debris collecting mechanism comprises an upper reamer, a drill rod joint and a water isolating sleeve which is hollow inside and has two open ends, the water isolating sleeve is positioned above the mandrel, the outer wall of one end of the water isolating sleeve is in sealing contact connection with the inner wall of the upper reamer through an O-shaped ring, and the outer wall of the other end of the water isolating sleeve is in sealing contact connection with the inner wall of the drill rod joint through the O-shaped ring; the rock debris collecting mechanism is used for completing rock debris collection and storage in the core drilling process.