CN116104418A - Coring bit device - Google Patents

Abstract

The invention relates to a coring bit device, which comprises a punching component, a stabilizing component and a coring component, wherein the coring component is arranged in an inner pipe formed by the punching component, and the stabilizing component is arranged between the outer wall of the coring component and the inner wall of the punching component.

Description

Coring bit device

Technical Field

The invention relates to the technical field of geological exploration, in particular to a coring bit device.

Background

In a conventional core drilling tool, a drill bit is in threaded connection with a reamer, threads of the drill bit are screwed more tightly in the drilling process, flushing fluid carrying rock slag passes through the drill bit, rock slag is easy to appear at a connecting thread, the drill bit is difficult to detach, and the connecting thread is easy to damage.

The stabilizer is arranged between the outer tube and the coring inner tube in the conventional coring drilling tool, plays a role of radially supporting the coring inner tube, and because the outer tube needs to drive the drill bit to rotate, in order to prevent the disturbance of the core and ensure the integrity of the core, the coring inner tube is not rotated, and the actual state of the stabilizer in the middle cannot be determined, so that the position of a friction surface of the stabilizer is difficult to be determined.

Disclosure of Invention

First, the technical problem to be solved

In view of the above-mentioned shortcomings and disadvantages of the prior art, the present invention provides a coring bit device, which solves the technical problem that when a stabilizer is replaced in the prior art, the whole drilling tool needs to be lifted to the surface, and the replacement time is prolonged along with the increase of the drilling distance, so as to seriously affect the drilling efficiency.

(II) technical scheme

In order to achieve the above purpose, the main technical scheme adopted by the invention comprises the following steps:

in a first aspect, the present invention provides a coring bit apparatus, comprising a coring assembly, a stabilizing assembly, and a coring assembly, wherein the coring assembly is disposed within an inner tube formed by the coring assembly, and the stabilizing assembly is disposed between an outer wall of the coring assembly and an inner wall of the coring assembly; torque can be transmitted between the punching component and the stabilizing component, and the coring component can be pulled out from the stabilizing component; a flow channel which can pass through the medium liquid is formed between the stabilizing component and the coring component, and the medium liquid can run from one end of the punching component to the other end of the punching component and be output; wherein, stable subassembly's first position and coring subassembly's second position frictional contact, and first position sets up to wear-resisting material, and the second position sets up to fragile material, and stable subassembly is along with the subassembly operation of punching, coring subassembly is rotatory not.

In this technical scheme, coring bit device includes the subassembly that punches, stable subassembly and coring subassembly, and the three is the setting form of mutually nested, and the subassembly that punches is in the outside, and the coring subassembly is in the inside, and stable subassembly then sets up between the inner wall of subassembly and the coring subassembly that punches, plays the supporting role to the coring subassembly to can keep coring subassembly's stability in the punching process of coring bit device.

There is the runner between stable subassembly and the coring subassembly, in punching process, medium liquid is inside this runner is input to coring bit device for relatively clear flushing fluid to finally export through the entry end of punching the subassembly, the flushing fluid can wash away the hole bottom, in the time of the lowering temperature still can mix partial impurity in the flushing fluid, and the impurity that mixes the flushing fluid finally gushes out the hole from the gap between pore wall and the outer wall of punching the subassembly outside, can participate in the circulation of input runner again after handling.

The first position and the second position are matched positions which actually play a supporting role between the coring assembly and the stabilizing assembly, the second position is set to be a wearing part relative to the first position, when the coring bit device executes a punching action, the stabilizing assembly follows the punching assembly to operate, and the coring assembly does not operate, so friction is generated between the first position and the second position, the first position and the second position are worn, but the first position is more wear-resistant relative to the second position, so that the wear of the second position is larger when the coring bit device executes the punching action, the wear of the first position is almost negligible, and when the coring bit device executes the core taking action, the coring assembly together with all the coring assembly and the stabilizing assembly can be taken out from the punching assembly in a rope coring mode, therefore, the wear state of the second position can be measured during each time of coring, and the replacement of the second position is completed quickly.

In one technical scheme of the invention, the punching assembly comprises a drill bit, a reamer, a first coupler and a second coupler which are sequentially connected in a threaded manner along an axis, and at least the radial outer position of the drill bit and the reamer, which corresponds to the punching assembly, is sealed through a sealing angle; the coring bit device further comprises sealing assemblies which are arranged on two axial sides of the threaded matching position of the bit and the reamer and correspond to the radial inner side position of the punching assembly.

In this technical scheme, the subassembly that punches includes drill bit, reamer, first shaft coupling and the second shaft coupling of threaded connection in proper order along the axis, and the drill bit is carried out the tunneling action when the operation, and the reamer then reams after the drill bit tunneling is accomplished, and first shaft coupling and second shaft coupling then play the effect of transmission moment, and it is used for transmitting the moment to the drill bit in the pit from uphole.

Specifically, the drill bit can be set as a diamond-impregnated core drill bit, the lip surface is in a shape of a wide horseshoe, the water gap distribution of the drill bit is favorable for realizing slag discharge in the hole, the outer surface of the drill bit is provided with external threads and is used for being connected with the internal threads of the reamer, the thread is provided with a 75-degree sealing angle, and flushing fluid on the outer surface is prevented from entering the inside of the threads.

Meanwhile, the coring bit device further comprises a sealing assembly, the sealing angle is used for preventing external flushing fluid from flowing into the threaded matching part between the bit and the reamer, the sealing assembly is used for preventing internal flushing fluid from flowing into the threaded matching part between the bit and the reamer, rock slag in the flushing fluid can be effectively prevented from entering the bit connecting threads under the combined action of internal sealing and external sealing, the bit dismounting difficulty and the thread damage degree are reduced, the reliability of the whole drilling work is further improved, and the working efficiency is improved.

More specifically, a 75 ° seal angle may be provided between the reamer and the first coupling, between the first coupling and the second coupling, and the reamer is threadedly engaged with the first coupling by internal threads, and the first coupling is also threadedly engaged with the second coupling by internal threads.

In one technical scheme of the invention, the inner surface of the drill bit is provided with a first cylindrical surface, a first conical surface, a first step surface and a second conical surface which are connected with each other, and the taper of the first conical surface is larger than that of the second conical surface; the stabilizing assembly comprises a stabilizing ring, wherein the outer surface of the stabilizing ring is provided with a second column surface, a second step surface, a third column surface and a fourth column surface which are connected with each other, the diameter of the second column surface is larger than that of the third column surface, and the diameter of the third column surface is larger than that of the fourth column surface; the second cylindrical surface is in clearance fit with the second conical surface, the third cylindrical surface is in clearance fit with the inner wall of the first coupler, the fourth cylindrical surface can transmit torque with the second coupler, and the axial position of the stabilizing ring is limited by the first step surface and the flange of the second coupler.

In the technical scheme, the inner surface of the drill bit is provided with a first cylindrical surface, a first conical surface, a first step surface and a second conical surface which are connected with each other, a circulation groove is formed on the first cylindrical surface and the first conical surface, so that flushing fluid passes through the first cylindrical surface, the first conical surface and the second conical surface are divided through the first step surface, the taper of the first conical surface is larger than that of the second conical surface, the taper of the first conical surface is set to be in a larger form, so that flushing fluid can be conveniently and better gathered to the circulation groove, and the higher taper design of the first conical surface is also beneficial to the flushing fluid to obtain higher output pressure, so that flushing of the hole bottom can be fully realized;

the second conical surface is arranged in a smaller taper mode, the second conical surface can be matched with the stabilizing ring better, a large gap is avoided between the second conical surface and the stabilizing ring, and then the stability of the stabilizing ring in the drill bit can be improved.

The surface of stabilizing ring has interconnect's second cylinder, second step face, third cylinder and fourth cylinder, and the second cylinder can with second conical surface clearance fit, and the third cylinder then can with the inner wall clearance fit of first shaft coupling to realize the torque transmission between first shaft coupling and the third cylinder, and then make the stabilizing ring can carry out the rotation action with punching the subassembly together, the axial position of stabilizing ring accessible first step face second shaft coupling's flange definition.

Specifically, the stabilizer ring may be provided in copper to improve the convenience of processing the stabilizer ring.

In one technical scheme of the invention, the third cylindrical surface is provided with the sealing groove, the sealing assembly at least comprises a first sealing ring and a second sealing ring, the first sealing ring is arranged between the stabilizing ring and the first step surface, and the second sealing ring is arranged in the sealing groove.

In this technical scheme, be provided with the seal groove on the third cylinder, the seal groove is circumference groove, first step face department is located to the first sealing washer, play the sealed effect between first step face and the steady ring terminal surface, seal groove department is located to the second sealing washer, play the sealed effect between steady ring outer wall and the first shaft coupling, so, the inside both sides position of the cooperation screw thread of drill bit and first shaft coupling just all has obtained sealedly, the effect of cooperation sealing angle, can prevent effectively that rock sediment in the flushing fluid from getting into in the drill bit connecting screw thread, reduce drill bit dismantlement degree of difficulty and screw thread damage degree, and then improve the reliability of whole drilling work, improve work efficiency.

In one technical scheme of the invention, the stabilizing assembly further comprises a bushing and a clamp spring, wherein the inner surface of the stabilizing ring is provided with a fifth cylindrical surface, a third step surface and a sixth cylindrical surface which are connected with each other, and the diameter of the fifth cylindrical surface is larger than that of the sixth cylindrical surface; the fifth cylindrical surface is in interference fit with the bushing, a clamp spring groove is formed in the fifth cylindrical surface, the clamp spring is arranged in the clamp spring groove, and the clamp spring and the third step surface can realize axial positioning of the bushing; the coring assembly comprises a clamping spring seat and a coring barrel which are connected with each other in a threaded manner, and the clamping spring seat is in friction contact with the bushing.

In this technical scheme, stable subassembly still includes bush and jump ring bush, and the bush is located the accommodation chamber that the fifth cylinder formed, and is equipped with the jump ring groove on the fifth cylinder, and the axial spacing of bush is realized to jump ring and third step face, and the subassembly of coring includes mutual threaded connection's jump ring seat and core section of thick bamboo, when dismantling the core section of thick bamboo, can take off the jump ring seat simultaneously, conveniently inspects it.

The fifth cylindrical surface is in interference fit with the bushing, so that torque transmission between the stabilizing ring and the bushing can be realized.

In one aspect of the invention, the first position is provided as a bushing and the second position is provided as a catch spring seat.

In this technical scheme, the first position sets up to the bush, and the second position sets up to the card spring seat, and both friction contacts realize coring assembly's support in stabilizing the subassembly, also can satisfy the flow demand of flushing fluid simultaneously.

In one aspect of the invention, the bushing can be provided as tungsten carbide.

In the technical scheme, the lining is made of tungsten carbide material, compared with other metal materials, the lining can ensure that the friction coefficient between the lining and flushing fluid is relatively smaller, and has the advantages of high hardness, good wear resistance, long service life and the like, and the lining is used as a base material of the lining.

In one aspect of the present invention, one of a key drive, a pin drive and a polygonal drive is provided between the second coupling and the fourth cylindrical surface.

In the technical scheme, one of key transmission, pin transmission and polygonal transmission is arranged between the second coupler and the fourth cylindrical surface, and specifically, the key transmission can be arranged, a transmission key can be arranged on the fourth cylindrical surface, and a key slot matched with the transmission key is arranged on the second coupler.

In one technical scheme of the invention, the second column surface is provided with a first dismounting hole, and the drill bit is provided with a second dismounting hole.

In this technical scheme, first dismantlement hole and second dismantlement hole all can set up to the blind hole, and when carrying out the dismantlement work of stabilizing ring and drill bit, can set up the instrument in corresponding first dismantlement hole and second dismantlement hole, conveniently rotate and pull drill bit and stabilizing ring, realize the dismouting of both.

Specifically, when dismantling stable subassembly, can dismantle the drill bit earlier, dismantle the connecting thread of first shaft coupling and second shaft coupling again, accomplish stable subassembly dismantlement through striking stable subassembly's right-hand member face.

The drill bit can be detached firstly, the connecting threads of the reamer and the first coupler can be detached firstly, and the stabilizing assembly is detached through the blind hole on the outer surface of the stabilizing ring.

In one technical scheme of the invention, the end face of the bushing is provided with a dismounting groove, and the inner side wall of the bushing is provided with a groove.

In this technical scheme, offered on the terminal surface of bush and torn open the groove, can set up to the semicircle groove, the atress position of bush when dismantling the bush, the slot then is used for satisfying the flushing fluid and passes through the bush, also can improve the flow efficiency of flushing fluid in the bush simultaneously, and the bush internal surface is equipped with the chamfer for make coring assembly pass through smoothly.

Advantageous effects

The beneficial effects of the invention are as follows: the coring bit device comprises a punching component, a stabilizing component and a coring component, wherein the punching component, the stabilizing component and the coring component are mutually nested, the punching component is arranged at the outermost side, the coring component is arranged at the innermost side, and the stabilizing component is arranged between the inner wall of the punching component and the coring component, so that the coring component is supported, and the coring component can be kept stable in the punching process of the coring bit device.

There is the runner between stable subassembly and the coring subassembly, in punching process, medium liquid is inside this runner is input to coring bit device for relatively clear flushing fluid to finally export through the entry end of punching the subassembly, the flushing fluid can wash away the hole bottom, in the time of the lowering temperature still can mix partial impurity in the flushing fluid, and the impurity that mixes the flushing fluid finally gushes out the hole from the gap between pore wall and the outer wall of punching the subassembly outside, can participate in the circulation of input runner again after handling.

The first position and the second position are matched positions which actually play a supporting role between the coring assembly and the stabilizing assembly, the second position is set to be a wearing part relative to the first position, when the coring bit device executes a punching action, the stabilizing assembly follows the punching assembly to operate, the coring assembly does not operate, friction is generated between the first position and the second position, loss is caused to the first position and the second position, but the first position is more wear-resistant relative to the second position, so that the loss of the second position is larger when the coring bit device executes the punching action, the loss of the first position is almost negligible, and when the coring bit device executes the core taking action, the coring assembly can be taken out from the punching assembly and the stabilizing assembly together with a rope coring mode, so that the wear state of the second position can be measured during each time of salvaging and the coring, and the replacement of the second position is completed.

Drawings

FIG. 1 is a schematic illustration of one of the constructions of the coring bit apparatus of the present invention;

FIG. 2 is a second schematic view of the core bit apparatus of the present invention;

FIG. 3 is a schematic cross-sectional view of the X-plane of FIG. 2 according to the present invention;

FIG. 4 is a schematic structural view of a stabilizer ring according to the present invention;

fig. 5 is a schematic structural view of the bushing of the present invention.

[ reference numerals description ]

1: a punching assembly;

11: a drill bit; a: a first cylindrical surface; b: a first conical surface; c: a first step surface; d: a second conical surface; q: a second disassembly hole;

12: a reamer;

13: a first coupling;

14: a second coupling;

15: a flange;

2: a stabilizing assembly;

21: a stabilizing ring; e: a second column surface; f: a second step surface; g: a third cylindrical surface; h: a fourth cylindrical surface; i: sealing grooves; j: a fifth cylindrical surface; k: a third step surface; l: a sixth cylindrical surface; m: a clamp spring groove; n: a first disassembly hole; o: a dismantling groove; p: a groove;

22: a bushing;

23: clamping springs;

3: a coring assembly;

31: a clamping spring seat;

32: a core barrel;

4: and (3) a sealing assembly.

Detailed Description

The present invention will be described in detail below with reference to fig. 1 to 5 for better explanation of the present invention, and for convenience of understanding. Wherein references herein to "upper", "lower", "etc. are made with reference to the orientation of fig. 1.

Example 1:

referring to fig. 1 and 2, an embodiment of the present invention provides a coring bit apparatus, including a punching assembly 1, a stabilizing assembly 2, and a coring assembly 3, wherein the coring assembly 3 is disposed in an inner tube formed by the punching assembly 1, and the stabilizing assembly 2 is disposed between an outer wall of the coring assembly 3 and an inner wall of the punching assembly 1; torque can be transmitted between the punching assembly 1 and the stabilizing assembly 2, the coring assembly 3 can be pulled out from the stabilizing assembly 2, a flow channel which meets the passing of medium liquid is formed between the stabilizing assembly 2 and the coring assembly 3, and the medium liquid can run from one end of the punching assembly 1 to the other end of the punching assembly 1 and be output; wherein, the first position of stable subassembly 2 and the second position frictional contact of coring assembly 3, and first position sets up to wear-resisting material, and the second position sets up to fragile material, and stable subassembly 2 is along with the operation of punching assembly 1, and coring assembly 3 is rotatory not.

In this embodiment, the coring bit device includes punching subassembly 1, stable subassembly 2 and coring subassembly 3, and the three is the mutually nested setting form, and punching subassembly 1 is in the outside, and coring subassembly 3 is in the inside, and stable subassembly 2 then sets up between the inner wall of punching subassembly 1 and coring subassembly 3, plays the supporting role to coring subassembly 3 to can keep coring subassembly 3 stable in the punching process of coring bit device.

There is the runner between stable subassembly 2 and the coring assembly 3, in punching process, medium liquid is inside this runner is input to coring bit device for relatively clear flushing fluid to finally export through the entry end of punching subassembly 1, the flushing fluid can wash away the hole bottom, in the time of the lowering temperature can also mix partial impurity in the flushing fluid, the impurity that mixes the flushing fluid finally gushes out the hole from the gap between pore wall and the outer wall of punching subassembly 1 outside, can participate in the circulation of input runner again after handling.

The first position and the second position are matched positions which actually play a supporting role between the coring assembly 3 and the stabilizing assembly 2, the second position is set to be a wearing part relative to the first position, when the coring bit device performs a punching action, the stabilizing assembly 2 runs along with the punching assembly 1, and the coring assembly 3 does not run, so friction is generated between the first position and the second position, the first position and the second position are worn, but the first position is more wear-resistant relative to the second position, so that the wear of the second position is larger when the coring bit device performs the punching action, the wear of the first position is almost negligible, and when the coring bit device performs the coring action, the coring assembly 3 together with all the cores are taken out from the punching assembly 1 and the stabilizing assembly 2 in a matching rope coring mode, therefore, the wear state of the second position can be measured during each coring, and the replacement of the second position is completed.

Referring to fig. 2, in the present embodiment, the perforating assembly 1 includes a drill bit 11, a reamer 12, a first coupling 13, and a second coupling 14 which are screwed in order along an axis, at least a radially outer position between the drill bit 11 and the reamer 12 corresponding to the perforating assembly 1 is sealed by a sealing angle; the coring bit assembly further includes a seal assembly 4, the seal assembly 4 being disposed on either axial side of the threaded engagement of the bit 11 and reamer 12 and corresponding to the radially inner position of the punch assembly 1.

In this embodiment, the drilling assembly 1 includes a drill bit 11, a reamer 12, a first coupling 13 and a second coupling 14 which are sequentially screwed along an axis, the drill bit 11 performs a driving action when operated, the reamer 12 reams the hole after the completion of driving of the drill bit 11, and the first coupling 13 and the second coupling 14 function to transmit torque for transmitting torque from the well to the drill bit 11 downhole.

Specifically, the bit 11 may be set as a diamond-impregnated core bit 11, the lip shape is a wide horseshoe shape, the water gap distribution is favorable for realizing slag discharge in the hole, the outer surface of the bit 11 is provided with external threads for being connected with the internal threads of the reamer 12, and the thread is provided with a 75-degree sealing angle to prevent flushing fluid on the outer surface from entering the inside of the threads.

Referring to fig. 2, the coring bit device further includes a sealing assembly 4, wherein the sealing angle is used for preventing external flushing fluid from flowing into the threaded matching portion between the bit 11 and the reamer 12, the sealing assembly 4 is used for preventing internal flushing fluid from flowing into the threaded matching portion between the bit 11 and the reamer 12, and under the combined action of internal sealing and external sealing, rock slag in the flushing fluid can be effectively prevented from entering the connecting threads of the bit 11, so that the disassembly difficulty and the thread damage degree of the bit 11 are reduced, the reliability of the whole drilling work is further improved, and the working efficiency is improved.

More specifically, a 75 ° seal angle may be provided between the reamer 12 and the first coupling 13, between the first coupling 13 and the second coupling 14, and the reamer 12 is screw-engaged with the first coupling 13 by internal threads, and the first coupling 13 is screw-engaged with the second coupling 14 by internal threads as well.

Referring to fig. 2, in the present embodiment, the inner surface of the drill bit 11 has a first cylindrical surface a, a first conical surface B, a first stepped surface C, and a second conical surface D connected to each other, the taper of the first conical surface B being greater than the taper of the second conical surface D; the stabilizing assembly 2 comprises a stabilizing ring 21, wherein the outer surface of the stabilizing ring 21 is provided with a second cylindrical surface E, a second step surface F, a third cylindrical surface G and a fourth cylindrical surface H which are connected with each other, the diameter of the second cylindrical surface E is larger than that of the third cylindrical surface G, and the diameter of the third cylindrical surface G is larger than that of the fourth cylindrical surface H; wherein the second cylindrical surface E is in clearance fit with the second conical surface D, the third cylindrical surface G is in clearance fit with the inner wall of the first coupling 13, the fourth cylindrical surface H is capable of transmitting torque with the second coupling 14, and the axial position of the stabilizing ring 21 is defined by the first stepped surface C and the flange 15 of the second coupling 14.

In this embodiment, the inner surface of the drill bit 11 has a first cylindrical surface a, a first conical surface B, a first step surface C and a second conical surface D that are connected to each other, a flow channel is formed on the first cylindrical surface a and the first conical surface B, so that the flushing fluid passes through the flow channel, the first conical surface B and the second conical surface D are divided by the first step surface C, the taper of the first conical surface B is larger than that of the second conical surface D, the taper of the first conical surface B is set to be in a larger form, so as to facilitate the flushing fluid to better gather into the flow channel, and the larger taper design of the first conical surface B is also beneficial to obtaining higher output pressure of the flushing fluid, so that flushing of the hole bottom can be fully realized;

setting the second conical surface D to the form that the tapering is less, can cooperate better between the stabilizer ring 21, avoid producing great space between the two, and then can improve the stability of stabilizer ring 21 in drill bit 11, simultaneously, when dismantling drill bit 11, drill bit 11 can not rub with stabilizer ring 21, has reduced the drill bit 11 and has dismantled the degree of difficulty.

The outer surface of the stabilizing ring 21 is provided with a second cylindrical surface E, a second step surface F, a third cylindrical surface G and a fourth cylindrical surface H which are mutually connected, the second cylindrical surface E can be in clearance fit with the second conical surface D, the third cylindrical surface G can be in clearance fit with the inner wall of the first coupler 13, torque transmission between the first coupler 13 and the third cylindrical surface G is realized, the stabilizing ring 21 can further perform rotation action together with the punching assembly 1, and the axial position of the stabilizing ring 21 can be defined by the flange 15 of the second coupler 14 of the first step surface C.

Specifically, the stabilizer ring 21 may be provided in copper to improve the convenience of processing the stabilizer ring 21.

Referring to fig. 2, in the present embodiment, a seal groove I is provided on the third cylindrical surface G, and the seal assembly 4 includes at least a first seal ring provided between the stabilizer ring 21 and the first step surface C, and a second seal ring provided in the seal groove I.

In this embodiment, be provided with seal groove I on the third cylinder G, seal groove I is circumference groove, first step face C department is located to first sealing washer, play the sealed effect between first step face C and the steady ring 21 terminal surface, seal groove I department is located to the second sealing washer, play sealed effect between steady ring 21 outer wall and the first shaft coupling 13, so, the inside both sides position of the cooperation screw thread of drill bit 11 and first shaft coupling 13 just all has obtained sealedly, the effect of cooperation sealing angle, rock sediment in the flushing fluid can be effectively prevented to get into in the drill bit 11 connecting screw thread, reduce drill bit 11 and dismantle the degree of difficulty and screw thread damage, and then improve whole drilling work's reliability, improve work efficiency.

Referring to fig. 2, in the present embodiment, the stabilizing assembly 2 further includes a bushing 22 and a snap spring 23, and the inner surface of the stabilizing ring 21 has a fifth cylindrical surface J, a third stepped surface K, and a sixth cylindrical surface L connected to each other, wherein the diameter of the fifth cylindrical surface J is larger than the diameter of the sixth cylindrical surface L; the fifth cylindrical surface J is in interference fit with the bushing 22, a clamp spring groove M is formed in the fifth cylindrical surface J, a clamp spring 23 is arranged in the clamp spring groove M, and the clamp spring 23 and the third step surface K can realize axial positioning of the bushing 22; the coring assembly 3 includes a circlip seat 31 and a coring barrel 32 that are threadably coupled to one another, the circlip seat 31 being in frictional contact with the bushing 22.

In this embodiment, stabilizing assembly 2 still includes bush 22 and jump ring 23 bush 22, and bush 22 locates the holding intracavity that fifth cylinder J formed, and is equipped with jump ring groove M on the fifth cylinder J, and jump ring 23 and third step face K realize the axial spacing of bush 22, and coring assembly 3 includes mutual threaded connection's jump ring seat 31 and coring barrel 32, when dismantling coring barrel 32, can take off simultaneously jump ring seat 31, conveniently inspect it.

The fifth cylindrical surface J is in interference fit with the bushing 22, and torque transmission between the stabilizer ring 21 and the bushing 22 can be achieved.

Referring to fig. 3, in the present embodiment, one of key transmission, pin transmission, and polygonal transmission is provided between the second coupling 14 and the fourth cylindrical surface H.

In this embodiment, one of key transmission, pin transmission and polygonal transmission is provided between the second coupling 14 and the fourth cylindrical surface H, specifically, key transmission may be provided, a transmission key may be provided on the fourth cylindrical surface H, and a key groove that mates with the transmission key may be provided on the second coupling 14.

The first position is set as the bushing 22 and the second position is set as the circlip seat 31.

In this embodiment, the first position is set as the bushing 22, the second position is set as the clamp spring seat 31, and the two are in friction contact, so that the coring assembly 3 is supported in the stabilizing assembly 2, and meanwhile, the flow requirement of the flushing liquid can be met.

In this embodiment, the liner 22 can be provided as tungsten carbide.

In the present embodiment, the lining 22 is made of tungsten carbide, which can ensure a relatively smaller friction coefficient with the flushing fluid, and has the advantages of high hardness, good wear resistance, long service life, etc., compared with other metal materials, so as to be used as a base material of the lining 22.

Example 2:

referring to fig. 1 and 4, the embodiment of the present invention further includes the following technical means in addition to all the technical means of the above embodiment:

the second column surface E is provided with a first dismounting hole N, and the drill bit 11 is provided with a second dismounting hole Q.

In this embodiment, the first disassembling hole N and the second disassembling hole Q may be blind holes, and when the stabilizing ring 21 and the drill bit 11 are disassembled, tools may be set in the corresponding first disassembling hole N and second disassembling hole Q, so as to facilitate the rotation and the pulling of the drill bit 11 and the stabilizing ring 21, and realize the disassembly and assembly of the two.

Specifically, when the stabilizing assembly 2 is disassembled, the drill bit 11 can be disassembled first, then the connecting threads of the first coupler 13 and the second coupler 14 are disassembled, and the stabilizing assembly 2 is disassembled by striking the right end face of the stabilizing assembly 2.

The drill bit 11 can be detached first, the connecting threads of the reamer 12 and the first coupler 13 can be detached first, and then the stabilizing assembly 2 can be detached through the blind hole on the outer surface of the stabilizing ring 21.

Example 3:

referring to fig. 5, the embodiment of the present invention further includes the following technical means in addition to all the technical means of any of the above embodiments:

in the present embodiment, the end surface of the liner 22 is provided with a dismounting groove O, and the inner side wall of the liner 22 is provided with a groove P.

In this embodiment, the end surface of the liner 22 is provided with a dismounting groove O, which may be a semicircular groove, for dismounting the liner 22, the groove P is used to satisfy the requirement that the flushing fluid passes through the liner 22, and meanwhile, the flow efficiency of the flushing fluid in the liner 22 can be improved, and the inner surface of the liner 22 is provided with a chamfer for the core component 3 to pass smoothly.

It will be appreciated that the above examples 1-3, except where conflicting moieties, may be freely combined to form further embodiments of the present invention.

In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; may be a communication between two elements or an interaction between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature, which may be in direct contact with the first and second features, or in indirect contact with the first and second features via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is level lower than the second feature.

The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus/means that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus/means.

Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will fall within the scope of the present invention.

Claims (10)

1. A coring bit assembly, characterized by: the core taking device comprises a punching component (1), a stabilizing component (2) and a core taking component (3), wherein the core taking component (3) is arranged in an inner pipe formed by the punching component (1), the stabilizing component (2) is arranged between the outer wall of the core taking component (3) and the inner wall of the punching component (1), torque can be transmitted between the punching component (1) and the stabilizing component (2), and the core taking component (3) can be pulled out from the stabilizing component (2);

a flow channel which can pass through the medium liquid is formed between the stabilizing component (2) and the coring component (3), and the medium liquid can move from one end of the punching component (1) to the other end of the punching component (1) and be output;

the first position of the stabilizing component (2) is in friction contact with the second position of the coring component (3), the second position is made of a fragile material relative to the first position, and the coring component (3) does not rotate while the stabilizing component (2) follows the punching component (1) to operate.

2. The core bit apparatus of claim 1, wherein: the punching assembly (1) comprises a drill bit (11), a reamer (12), a first coupler (13) and a second coupler (14) which are sequentially connected in a threaded manner along an axis, and at least the radial outer position between the drill bit (11) and the reamer (12) corresponding to the punching assembly is sealed through a sealing angle;

the coring bit device further comprises a sealing assembly (4), wherein the sealing assembly (4) is arranged on two axial sides of the threaded matching position of the bit (11) and the reamer (12) and corresponds to the radial inner side position of the punching assembly.

3. The core bit apparatus of claim 2, wherein: the inner surface of the drill bit (11) is provided with a first cylindrical surface (A), a first conical surface (B), a first step surface (C) and a second conical surface (D) which are sequentially connected along an axis, and the taper of the first conical surface (B) is larger than that of the second conical surface (D);

the stabilizing assembly (2) comprises a stabilizing ring (21), wherein the outer surface of the stabilizing ring (21) is provided with a second cylindrical surface (E), a second step surface (F), a third cylindrical surface (G) and a fourth cylindrical surface (H) which are sequentially connected along an axis, the diameter of the second cylindrical surface (E) is larger than that of the third cylindrical surface (G), and the diameter of the third cylindrical surface (G) is larger than that of the fourth cylindrical surface (H);

wherein the second cylindrical surface (E) is in clearance fit with the second conical surface (D), the third cylindrical surface (G) is in clearance fit with the inner wall of the first coupling (13), the fourth cylindrical surface (H) can transmit torque with the second coupling (14), and the axial position of the stabilizing ring (21) is defined by the first step surface (C) and the flange (15) of the second coupling (14).

4. The coring bit apparatus of claim 3, wherein: the sealing assembly is characterized in that a sealing groove (I) is formed in the third cylindrical surface (G), the sealing assembly (4) at least comprises a first sealing ring and a second sealing ring, the first sealing ring is arranged between the stabilizing ring (21) and the first step surface (C), and the second sealing ring is arranged in the sealing groove (I).

5. The core bit apparatus of claim 4, wherein: the stabilizing assembly (2) further comprises a bushing (22) and a clamp spring (23), wherein the inner surface of the stabilizing ring (21) is provided with a fifth cylindrical surface (J), a third step surface (K) and a sixth cylindrical surface (L) which are connected with each other, and the diameter of the fifth cylindrical surface (J) is larger than that of the sixth cylindrical surface (L);

the fifth cylindrical surface (J) is in interference fit with the bushing (22), a clamp spring groove (M) is formed in the fifth cylindrical surface (J), the clamp spring (23) is arranged in the clamp spring groove (M), and the clamp spring (23) and the third step surface (K) can realize axial positioning of the bushing (22);

the coring assembly (3) comprises a clamping spring seat (31) and a coring barrel (32) which are in threaded connection with each other, and the clamping spring seat (31) is in friction contact with the bushing (22).

6. The core bit apparatus of claim 5, wherein: the first position is set as the bushing (22), and the second position is set as the click spring seat (31).

7. The core bit apparatus of claim 6, wherein: the bushing (22) can be provided as tungsten carbide.

8. The core bit apparatus of claim 7, wherein: and one of key transmission, pin transmission and polygonal transmission is arranged between the second coupler (14) and the fourth cylindrical surface (H).

9. The core bit apparatus of claim 8, wherein: the second column surface (E) is provided with a first dismounting hole (N), and the drill bit (11) is provided with a second dismounting hole (Q).

10. The core bit apparatus of claim 9, wherein: the end face of the lining (22) is provided with a dismantling groove (O), and the inner side wall of the lining (22) is provided with a groove (P).

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