CN212249914U

CN212249914U - Coring drilling tool capable of removing blockage while drilling

Info

Publication number: CN212249914U
Application number: CN202020567581.8U
Authority: CN
Inventors: 施山山; 李宽; 闫家; 李鑫淼; 刘秀美; 李小洋; 尹浩; 汪凯丽; 王文
Original assignee: Institute of Exploration Technology Chinese Academy of Geological Sciences
Current assignee: Institute of Exploration Technology Chinese Academy of Geological Sciences
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2020-12-29
Anticipated expiration: 2030-04-16

Abstract

A coring drilling tool capable of removing blockage while drilling: the core drilling tool comprises a suspension part, a first double female joint, a second double female joint, a ball seat part, an inner pipe, a drill bit, a drill string and an outer pipe; the lower end of the drill string is connected with the upper end of the suspension part; the inner wall of the upper end of the first double female joint is in threaded connection with the outer wall of the lower end of the suspension part; the outer wall of the upper end of the outer pipe is in threaded connection with the inner wall of the lower end of the suspension part; the lower end of the outer pipe is connected with a drill bit; the inner wall of the lower end of the double female joint II is connected with the outer wall of the upper end of the ball seat part; an impact part, a trigger part and a struck part are additionally arranged; the impact part and the trigger part are matched to impact the impacted part, so that the blocked rock core in the inner pipe is loosened by vibration. The utility model discloses can come the interior stifled rock core of intraductal card to separate stifled through the hydraulic pressure of adjusting drilling fluid, the practicality is strong, can in time separate stifled, has improved drilling efficiency greatly, has reduced engineering cost.

Description

Coring drilling tool capable of removing blockage while drilling

Technical Field

The utility model relates to a coring drilling tool, especially one kind can be when the rock core card is stifled, need not to hang out the earth's surface with coring drilling tool, just can be with the coring drilling tool of rock core mediation at the bottom of the earth, belong to geological exploration technical field.

Background

In geological exploration activities, the key link of coring is seldom realized no matter in the detection of rock strata or the detection of petroleum strata. The core with different depths is taken out from the ground through coring operation, then the taken out core is subjected to data acquisition, and the data is analyzed to obtain the mechanical and physical performance parameters of the rock in the deep stratum, so that the information of the drilled stratum is known, and the safe and efficient development of drilling and production operation is guaranteed. In the current coring operation, the coring tool breaks the core from the stratum in a mode of clamping the core and takes out the core, and for a harder stratum, the coring tool is very practical and has a high coring success rate, but for a breakable stratum, the success rate of the coring tool is very low, and even coring fails; in the process of coring operation on a fractured stratum, the rock core is broken due to vibration or self reasons after entering the inner cylinder, and the broken rock core is not columnar and is easy to block; at present, when the core is blocked, the core drilling tool is generally lifted out of the ground, and then the blocked core is manually disassembled, but the method usually prolongs the coring operation period, and the acquisition of stratum data at a key layer position fails, possibly causes the collapse of a well wall and the failure of coring; therefore, it is necessary to design a simple, economical, reliable and convenient coring drill tool capable of removing blockage while drilling in combination with the difficulty of practical operation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a can remove stifled coring drilling tool along with boring, it not only can suffer the rock core that blocks up in the inner tube and remove stifled, but also can the continuation remove stifled, reaches along with stifled purpose along with removing, is showing and has improved the success rate of coring, has greatly reduced the cost of coring operation.

The problem is solved through following technical scheme:

a coring drilling tool capable of removing blockage while drilling: the core drilling tool comprises a suspension part, a first double female joint, a second double female joint, a ball seat part, an inner pipe, a drill bit, a drill string and an outer pipe; the lower end of the drill string is connected with the upper end of the suspension part; the inner wall of the upper end of the first double female joint is in threaded connection with the outer wall of the lower end of the suspension part; the outer wall of the upper end of the outer pipe is in threaded connection with the inner wall of the lower end of the suspension part; the lower end of the outer pipe is connected with a drill bit; the inner wall of the lower end of the double female joint II is connected with the outer wall of the upper end of the ball seat part; an impact part, a trigger part and a struck part are additionally arranged; the upper end of the trigger part is in threaded connection with the lower end of the first double-female connector; the trigger portion is disposed within the impact portion; the upper end of the double female joint II is in threaded connection with the lower end of the triggering part; the lower end of the ball seat part is connected with a striking receiving part; the lower end of the impacted part is connected with the inner pipe.

The coring drilling tool capable of plugging removal while drilling comprises the impact part: the device comprises an upper cylinder cover, an upper piston, a return spring I, a piston rod, a piston cylinder, a lower cylinder cover, a return spring II and an impact hammer; the upper end of the upper cylinder cover is in the shape of a hollow disc, and the lower end of the upper cylinder cover is in the shape of a hollow cylinder; the inner diameter of the hollow disc is the same as and coincident with that of the hollow cylinder; the outer diameter of the hollow disc part at the upper end of the upper barrel cover is the same as that of the first double-female connector; the inner wall of the hollow disc part at the upper end of the upper cylinder cover is connected with the trigger part; the upper piston is a hollow disc and is sleeved on the trigger part; the return spring is sleeved on the trigger part, and the upper end of the first return spring is fixed on the lower end face of the upper piston; the piston rod is a hollow round tube with a thick upper part and a thin lower part, the inner diameter of the thicker part of the upper end is equal to that of the thinner part of the lower end, and the outer diameter of the thicker part of the upper end is larger than that of the thinner part of the lower end; the piston rod is sleeved on the trigger part, and the outer diameter of the piston rod is smaller than the inner diameter of the first return spring; the outer diameter of the upper end part of the piston rod is the same as that of the upper piston; the upper end surface of the piston rod is fixedly connected with the lower end of the first return spring; the piston cylinder is a hollow cylinder, the upper part of the piston cylinder is thick, the lower part of the piston cylinder is thin, the inner diameter of the thick part at the upper end is smaller than that of the thin part at the lower end, and the outer diameter of the thick part at the upper end is equal to that of the thin part at the lower end; the inner wall of the upper end of the piston cylinder is in threaded connection with the outer wall of the lower end of the upper cylinder cover; the shape structure of the lower cylinder cover is the same as that of the upper cylinder cover, the upper end of the lower cylinder cover is in the shape of a hollow cylinder, and the lower end of the lower cylinder cover is in the shape of a hollow disc; the outer wall of the upper end of the lower cylinder cover is in threaded connection with the inner wall of the lower end of the piston cylinder; the inner diameter of the lower cylinder cover is larger than the outer diameter of the thinner part at the lower end of the piston rod, and the inner diameter of the lower cylinder cover is smaller than the outer diameter of the thicker part at the upper end of the piston rod; the inner diameter of the return spring II is larger than the outer diameter of the piston rod; the outer diameter of the second return spring is larger than the inner diameter of the lower cylinder cover; the upper end of the second return spring is fixedly connected with the lower end face of the lower cylinder cover; the upper end of the impact hammer is in the shape of a hollow disc, the lower end of the impact hammer is in the shape of a hollow cylinder, the inner diameter of the hollow disc at the upper end of the impact hammer is smaller than that of the hollow cylinder at the lower end of the impact hammer, and the outer diameter of the hollow disc at the upper end of the impact hammer is equal to that of the hollow cylinder at the lower end; the upper end surface of the impact hammer is fixedly connected with the piston rod; the lower end of the second return spring is fixedly connected with the upper end face of the impact hammer.

The coring drilling tool capable of plugging removal while drilling comprises the trigger part: the inner cylinder, the one-way valve, the floating valve shaft, the pin, the floating valve and the limiting spring; the upper end of the inner cylinder is in threaded connection with the lower end of the first double-female connector; the lower end of the inner wall of the inner cylinder is provided with a conical seat, and a conical through hole is formed in the axis of the conical seat; four one-way valves are circumferentially and symmetrically arranged on the circumference of the inner cylinder; the floating valve shaft is a round rod with a thick upper part and a thin lower part; the float valve is a conical body, and a through hole is formed in the axis direction of the float valve, and the diameter of the through hole is smaller than that of a round rod at the thick end of the float valve shaft and larger than that of a round rod at the thin end of the float valve shaft; the tip of the float valve is downward, and the through hole on the float valve is sleeved on the thin end round rod of the float valve shaft; the thick end part of the floating valve shaft is provided with a through hole on the horizontal plane, the pin passes through the through hole, and two ends of the pin are fixed on the inner wall of the inner cylinder; the inner diameter of the limiting spring is larger than the diameter of the round rod at the thin end of the floating valve shaft and the inner diameter of the vertical through hole of the floating valve, the inner diameter of the limiting spring is smaller than the diameter of the thickest end of the floating valve, the limiting spring is sleeved on the round rod at the thin end of the floating valve shaft, and the upper end of the limiting spring is in contact with the lower end of the floating valve; the shape of the conical inclined plane of the float valve is coincided with the shape of the bevel edge of the conical through hole on the conical seat at the lower end of the inner wall of the inner cylinder.

The coring drilling tool capable of removing the blockage while drilling comprises a ball seat, a ball seat body, a water hole II and a conical seat; four water holes II are symmetrically formed in the ball seat body in the circumferential direction and penetrate through the inner wall and the outer wall of the ball seat body; the upper end of a water hole II on the outer wall of the ball seat body is provided with an external thread, and the external thread and the internal thread at the lower end of the double female joint II form threaded connection; a conical seat is arranged at the lower end of a water hole II on the inner wall of the ball seat body; the steel ball is arranged on the conical seat.

According to the coring drilling tool capable of removing blockage while drilling, the impacted part comprises a fastening ring, a limiting ring and an impact joint; the height, the inner diameter and the outer diameter of the fastening ring and the limiting ring are the same, the inner wall of the fastening ring is provided with internal threads, and the inner wall of the limiting ring is smooth; the lower end of a water hole in the outer wall of the ball seat body is provided with an external thread, and the fastening ring and the external thread form threaded connection; the impact joint is divided into an upper end part, a middle end part and a lower end part according to different inner diameters, wherein the outer diameters of the upper end part, the middle end part and the lower end part of the impact joint are the same, and the inner diameters are sequentially reduced; the impact joint is sleeved on the ball seat body, and the upper end surface of the upper end part of the impact joint is contacted with the lower end surface of the fastening ring; the limiting ring is sleeved on the ball seat body, and the upper end face of the limiting ring is in contact with the lower end face of the upper end part of the impact joint; the wall thickness of the limiting ring is equal to the difference of the inner radius of the upper end part and the middle end part of the impact joint; the lower end surface of the limiting ring is contacted with the coarse and fine variable diameter step at the lower end of the ball seat body; the inner wall of the lower end part of the impact joint is in threaded connection with the outer wall of the upper end of the inner pipe.

According to the coring drilling tool capable of removing blockage while drilling, the double female joint II comprises a water hole I, a closed groove and a connecting sleeve; the cross section of the connecting sleeve is H-shaped; inner threads are arranged on the inner walls of the upper end and the lower end of the connecting sleeve; the internal thread of the inner wall of the upper end of the connecting sleeve is in threaded connection with the lower end of the inner cylinder; the upper end surface of the middle disc part of the connecting sleeve is provided with an incompletely-penetrated closed groove; the closed groove is in interference fit with the lower end of the floating valve rod; the four water holes are symmetrically arranged at the upper end of the connecting sleeve in the circumferential direction, and the first water hole penetrates through the connecting sleeve; the first water hole is positioned at the lower end of the inner barrel and at the upper end of the middle part of the double female joint.

The coring drilling tool capable of removing the blockage while drilling comprises a suspension part, a drill bit and a drill bit, wherein the suspension part comprises a bearing seat, an upper bearing, a lower bearing and a mandrel; the upper bearing and the lower bearing are the same in structure size; the mandrel is a cylinder with a thick middle part and thin two ends; the inner wall of the upper bearing is in interference fit with the outer wall of the upper end of the mandrel; the inner wall of the lower bearing is in interference fit with the outer wall of the lower end of the mandrel; the outer wall of the outer ring of the upper bearing is in interference fit with the inner wall of the upper end of the bearing seat; the outer wall of the lower bearing outer ring is in interference fit with the inner wall of the lower end of the bearing seat; the upper end of the bearing seat is in threaded connection with the lower end of the drill column; the shaft axes of the bearing seat, the upper bearing, the lower bearing and the mandrel are the same line.

The utility model effectively improves the blockage removing and blockage removing capability of the drilling device through the impact part, the trigger part and the impacted part, and avoids the situation that once the rock core is blocked in the inner tube, the whole drilling device can only be lifted out of the ground to remove the blockage in the drilling process; the impact part is matched with the trigger part, a reciprocating impact hammer is provided in the inner pipe, under the condition that the rock core is clamped in the inner pipe, the impact hammer which moves in a reciprocating mode continuously strikes the impacted part, so that the inner pipe connected with the impacted part is vibrated, small blocks or particles of the blocked rock core are vibrated to be loose or even broken by the vibrated inner pipe, and the aim of releasing the clamping without lifting the equipment out of the ground is achieved.

Drawings

FIG. 1 is a schematic sectional view of the present invention;

FIG. 2 is a partial enlarged view of the present invention B;

fig. 3 is a partial enlarged view of the present invention a.

The list of labels in the figure is: 1. the double-female joint comprises a first double-female joint, a second double-female joint, an inner pipe, a third double-female joint, a drill bit, a fourth double-female joint, a drill string, a fourth double-female joint, an outer pipe, a fourth double-female joint, an upper cylinder cover, a fourth double-female joint, an upper piston, a lower spring, a piston rod, a piston cylinder, a lower cylinder cover, a fourth double-female joint, a percussion hammer, an inner cylinder, a check valve, a floating valve shaft, a pin, a floating valve, a limiting spring, a conical seat, a steel ball, a ball seat body, a water hole, a conical seat, a fastening ring, a limiting ring, a striking joint, a water hole I, a sealing groove, a connecting sleeve, a.

Detailed Description

Referring to fig. 1, 2 and 3, the present invention includes a hanging portion, a first double female joint 1, a second double female joint, a ball seat portion, an inner tube 2, a drill bit 3, a drill string 4 and an outer tube 5; the lower end of the drill string 4 is connected with the upper end of the suspension part; the inner wall of the upper end of the first double female joint 1 is in threaded connection with the outer wall of the lower end of the suspension part; the outer wall of the upper end of the outer pipe 5 is in threaded connection with the inner wall of the lower end of the suspension part; the lower end of the outer pipe 5 is connected with a drill bit 3; the inner wall of the lower end of the double female joint II is connected with the outer wall of the upper end of the ball seat part; an impact part, a trigger part, a struck part and a lock barrel assembly are additionally arranged; the upper end of the trigger part is in threaded connection with the lower end of the first double-female connector 1; the trigger part is arranged on the impact part; the upper end of the double female joint II is in threaded connection with the lower end of the triggering part; the lower end of the ball seat part is connected with a striking receiving part; the lower end of the impacted part is connected with an inner pipe 2; the lower end of the inner tube 2 is clamped with the lock cylinder tube assembly.

In order to provide a continuous impact force for the impacted part, the utility model is additionally provided with an impact part and a trigger part; the impact portion includes: the device comprises an upper cylinder cover 6, an upper piston 7, a first return spring 8, a piston rod 9, a piston cylinder 10, a lower cylinder cover 11, a second return spring 12 and an impact hammer 13; the trigger part includes: the inner cylinder 14, the one-way valve 15, the floating valve shaft 16, the pin 17, the floating valve 18 and the limiting spring 19; the upper end of the inner cylinder 14 is in threaded connection with the lower end of the first double-female connector 1; a conical seat 20 is arranged at the lower end of the inner wall of the inner cylinder 14, and a conical through hole is arranged on the axis of the conical seat 20; four check valves 15 are symmetrically arranged on the circumference of the inner cylinder 14 in the circumferential direction, the check valves 15 are communicated with the inner side and the outer side of the inner cylinder 14, and fluid can flow from the inside of the inner cylinder 14 to the outside of the inner cylinder 14 through the check valves 15; the upper end of the upper cylinder cover 6 is in the shape of a hollow disc, and the lower end of the upper cylinder cover is in the shape of a hollow cylinder; the inner diameter of the hollow disc is the same as and coincident with that of the hollow cylinder; the outer diameter of the hollow disc part at the upper end of the upper barrel cover 6 is the same as that of the first double-female joint 1; the inner wall of the hollow disc part at the upper end of the upper barrel cover 6 is in threaded connection with the outer wall of the inner barrel 14; the upper piston 7 is a hollow disc, the upper piston 7 is sleeved on the inner cylinder 14, and the inner diameter of the upper piston 7 is 0.3-0.5cm larger than the outer diameter of the inner cylinder 14; the first return spring 8 is sleeved on the outer wall of the inner cylinder 14, and the upper end of the first return spring 8 is fixed on the lower end face of the upper piston 7; the piston rod 9 is a hollow round tube with a thick upper part and a thin lower part, the inner diameter of the thicker part of the upper end is equal to that of the thinner part of the lower end, and the outer diameter of the thicker part of the upper end is larger than that of the thinner part of the lower end; the piston rod 9 is sleeved on the inner cylinder 14, the inner diameter of the piston rod 9 is 0.2-0.3cm larger than the outer diameter of the inner cylinder 14, and the outer diameter of the piston rod 9 is smaller than the inner diameter of the first return spring 8; the outer diameter of the upper end part of the piston rod 9 is the same as that of the upper piston 7; the upper end surface of the piston rod 9 is fixedly connected with the lower end of the return spring I8; the piston cylinder 10 is a hollow cylinder, the upper part of the piston cylinder is thick, the lower part of the piston cylinder is thin, the inner diameter of the thick part at the upper end is smaller than that of the thin part at the lower end, and the outer diameter of the thick part at the upper end is equal to that of the thin part at the lower end; the inner wall of the upper end of the piston cylinder 10 is in threaded connection with the outer wall of the lower end of the upper cylinder cover 6; the shape and structure of the lower cylinder cover 11 are the same as those of the upper cylinder cover 6, the upper end of the lower cylinder cover 11 is a hollow cylinder, and the lower end of the lower cylinder cover 11 is a hollow disc; the outer wall of the upper end of the lower cylinder cover 11 is in threaded connection with the inner wall of the lower end of the piston cylinder 10; the inner diameter of the lower cylinder cover 11 is larger than the outer diameter of the thinner part at the lower end of the piston rod 9, and the inner diameter of the lower cylinder cover 11 is smaller than the outer diameter of the thicker part at the upper end of the piston rod 9; the inner diameter of the second return spring 12 is larger than the outer diameter of the piston rod 9; the outer diameter of the second return spring 12 is larger than the inner diameter of the lower cylinder cover 11; the upper end of the second return spring 12 is fixedly connected with the lower end face of the lower cylinder cover 11; the upper end of the impact hammer 13 is in the shape of a hollow disc, the lower end of the impact hammer 13 is in the shape of a hollow cylinder, the inner diameter of the hollow disc at the upper end of the impact hammer 13 is smaller than that of the hollow cylinder at the lower end of the impact hammer 13, and the outer diameter of the hollow disc at the upper end of the impact hammer 13 is equal to that of the hollow cylinder at the lower end; the upper end surface of the impact hammer 13 is fixedly connected with the piston rod 9; the lower end of the second return spring 12 is fixedly connected with the upper end surface of the impact hammer 13; the floating valve shaft 16 is a round rod with a thick upper part and a thin lower part; the float valve 18 is a conical body, and is provided with a through hole in the axis direction, and the diameter of the through hole is smaller than the diameter of the thick end round rod of the float valve shaft 16 and larger than the diameter of the thin end round rod of the float valve shaft 16; the tip of the float valve 18 is downward, a through hole on the float valve 18 is sleeved on a thin end round rod of the float valve shaft 16, and the float valve 18 can move up and down on the float valve shaft 16; the thick end part of the floating valve shaft 16 is provided with a through hole on the horizontal plane, a pin 17 passes through the through hole, and two ends of the pin 17 are fixed on the inner wall of the inner cylinder 14; the inner diameter of the limiting spring 19 is larger than the diameter of the thin-end round rod of the floating valve shaft 16 and the inner diameter of the vertical through hole of the floating valve 18, the inner diameter of the limiting spring 19 is smaller than the diameter of the thickest end of the floating valve 18, the limiting spring 19 is sleeved on the thin-end round rod of the floating valve shaft 16, and the upper end of the limiting spring 19 is in contact with the lower end of the floating valve 18; the presence of the limit spring 19 allows the float valve 18 to move downwards only when it is subjected to a downward pressure; the shape of the conical inclined plane of the float valve 18 is coincided with the shape of the inclined edge of the conical through hole on the conical seat 20 at the lower end of the inner wall of the inner cylinder 14; when the float valve 18 moves to the lower end and coincides with the tapered through hole, the lower end of the inner cylinder 14 is blocked, so that the fluid in the inner cylinder 14 will flow out of the inner cylinder 14 through the check valve 15; when the lower end of the inner cylinder 14 is blocked, fluid in the inner cylinder 14 flows into the piston cylinder 10 through the check valve 15, the high-pressure fluid provides high-pressure thrust to push the upper piston 7 downwards, the first return spring 8 also moves downwards, then the piston rod 9 drives the impact hammer 13 to move downwards under the action of the first return spring 8, and the second return spring 12 is stretched.

The ball seat comprises a steel ball 21, a ball seat body 22, a second water hole 23 and a conical seat 24; four water holes 23 are symmetrically formed in the ball seat body 22 in the circumferential direction, and the water holes 23 penetrate through the inner wall and the outer wall of the ball seat body 22; the upper end of a water hole II 23 on the outer wall of the ball seat body 22 is provided with an external thread, and the external thread and the internal thread at the lower end of the double female joint II form threaded connection; a conical seat 24 is arranged at the lower end of a water hole II 23 on the inner wall of the ball seat body 22; the steel ball 21 is arranged on the conical seat 24; the steel ball 21 is placed on the conical seat 24 at first, when the drilling device descends, the core enters the inner pipe 2, the inner pipe 2 is filled with drilling fluid, the core pushes the drilling fluid to move upwards, so that the drilling fluid in the inner pipe 2 is upwards extruded to push the steel ball 21 out of the conical seat 24, and the drilling fluid enters the ball seat body 22 through a channel on the conical seat 24 and is discharged from the water hole two 23.

The impacted part comprises a fastening ring 25, a limiting ring 26 and an impact joint 27; the height and the inner and outer diameters of the fastening ring 25 and the limiting ring 26 are the same, the inner wall of the fastening ring 25 is provided with internal threads, and the inner wall of the limiting ring 26 is smooth; the lower end of a water hole in the outer wall of the ball seat body 22 is provided with an external thread, and the fastening ring 25 and the external thread form threaded connection; the impact joint 27 is divided into an upper end part, a middle end part and a lower end part according to different inner diameters, wherein the outer diameters of the upper end part, the middle end part and the lower end part of the impact joint 27 are the same, and the inner diameters are sequentially reduced; the impact joint 27 is sleeved on the ball seat body 22, and the upper end surface of the upper end part of the impact joint 27 is contacted with the lower end surface of the fastening ring 25; the limiting ring 26 is sleeved on the ball seat body 22, and the upper end surface of the limiting ring 26 contacts the lower end surface of the upper end part of the impact joint 27; the wall thickness of the stop collar 26 is equal to the difference in the inner radius of the upper and middle portions of the impact joint 27; the lower end surface of the limit ring 26 contacts the thick and thin variable diameter step at the lower end of the ball seat body 22; the inner wall of the lower end part of the impact joint 27 is in threaded connection with the outer wall of the upper end of the inner pipe 2; the impact hammer 13 continuously strikes the impact joint 27, and the inner pipe 2 vibrates along with the impact joint, so that the core is clamped and loosened in the inner pipe 2, and the purpose of releasing the clamp is achieved.

The double female joint II comprises a water hole I28, a closed groove 29 and a connecting sleeve 30; the cross section of the connecting sleeve 30 is H-shaped; inner threads are arranged on the inner walls of the upper end and the lower end of the connecting sleeve 30; the internal thread of the inner wall of the upper end of the connecting sleeve 30 is connected with the lower end of the inner cylinder 14 through a thread; the upper end surface of the middle disk part of the connecting sleeve 30 is provided with a closed groove 29 which is not completely penetrated; the closing groove 29 is in interference fit with the lower end of the float valve shaft 16; the four water holes I28 are circumferentially and symmetrically arranged at the upper end of the connecting sleeve 30, and the water holes I28 penetrate through the inner wall and the outer wall of the connecting sleeve 30; the first water hole 28 is positioned at the lower end of the inner barrel 14 and at the upper end of the middle part of the double female joint.

The suspension portion includes a bearing housing 31, an upper bearing 32, a lower bearing 33, and a spindle 34; the upper bearing 32 and the lower bearing 33 have the same structure and size; the mandrel 34 is a cylinder with a thick middle part and two thin ends; the inner wall of the upper bearing 32 is in interference fit with the outer wall of the upper end of the mandrel 34; the inner wall of the lower bearing 33 is in interference fit with the outer wall of the lower end of the mandrel 34; the outer ring outer wall of the upper bearing 32 is in interference fit with the inner wall of the upper end of the bearing seat 31; the outer wall of the outer ring of the lower bearing 33 is in interference fit with the inner wall of the lower end of the bearing seat 31; the upper end of the bearing seat 31 is in threaded connection with the lower end of the drill string 4; the shaft axes of the bearing seat 31, the upper bearing 32, the lower bearing 33 and the mandrel 34 are the same line; the purpose of the differential movement between the outer tube 5 and the spindle 34 is achieved by means of upper and lower bearings 33.

When the rock core is blocked underground, the hydraulic pressure of the drilling fluid is increased, so that the float valve 18 moves downwards until a channel at the lower end of the inner cylinder 14 is blocked, at the moment, high-pressure liquid in the inner tube 2 flows into the piston cylinder 10 through the one-way valve 15, the high-pressure fluid pushes the upper piston 7 and the first return spring 8 to move downwards, so that the piston rod 9 and the impact hammer 13 are pushed to move downwards, when the upper piston 7 moves to the same horizontal line of a pressure relief groove 35 in the middle of the piston cylinder 10, the drilling fluid enters the pressure relief groove 35, at the moment, the hydraulic pressure at the upper part of the upper piston 7 is suddenly reduced, the fluid pressure at the upper part of the upper piston 7 is gradually reduced, and the second return spring 12 is gradually; after the impact hammer 13 impacts the impact joint 27, the impact hammer starts to move upwards under the action of the tension of the first return spring 8 and the second return spring 12 and the pressure difference between the upper piston 7 and the lower piston; so relapse, the impact hammer lasts to strike joint 27, and under the effect of striking force, the rock core in inner tube 2 is shaken the pine to realize the purpose of deblocking and unfreezing, when drilling equipment can normally descend, resume normal drilling fluid hydraulic pressure, the float valve resets under limiting spring 19's effect, and the intraductal passageway is opened, thereby continues to develop work.

Claims

1. A coring drilling tool capable of removing blockage while drilling comprises a suspension part, a first double female joint (1), a second double female joint, a ball seat part, an inner pipe (2), a drill bit (3), a drill string (4) and an outer pipe (5); the lower end of the drill string (4) is connected with the upper end of the suspension part; the inner wall of the upper end of the double-female joint I (1) is in threaded connection with the outer wall of the lower end of the suspension part; the outer wall of the upper end of the outer pipe (5) is in threaded connection with the inner wall of the lower end of the suspension part; the lower end of the outer pipe (5) is connected with a drill bit (3); the inner wall of the lower end of the double female joint II is connected with the outer wall of the upper end of the ball seat part; the method is characterized in that: an impact part, a trigger part and a struck part are additionally arranged; the upper end of the trigger part is in threaded connection with the lower end of the first double-female connector (1); the trigger portion is disposed within the impact portion; the upper end of the double female joint II is in threaded connection with the lower end of the triggering part; the lower end of the ball seat part is connected with a striking receiving part; the lower end of the impacted part is connected with an inner tube (2).

2. The coring drill tool capable of unplugging while drilling of claim 1, wherein: the impact portion includes: the device comprises an upper cylinder cover (6), an upper piston (7), a first return spring (8), a piston rod (9), a piston cylinder (10), a lower cylinder cover (11), a second return spring (12) and an impact hammer (13); the upper end of the upper cylinder cover (6) is in the shape of a hollow disc, and the lower end of the upper cylinder cover is in the shape of a hollow cylinder; the inner diameter of the hollow disc is the same as and coincident with that of the hollow cylinder; the outer diameter of the hollow disc part at the upper end of the upper cylinder cover (6) is the same as that of the first double-female connector (1); the inner wall of the hollow disc part at the upper end of the upper cylinder cover (6) is connected with the trigger part; the upper piston (7) is a hollow disc and is sleeved on the trigger part; the first return spring (8) is sleeved on the trigger part, and the upper end of the first return spring (8) is fixed on the lower end face of the upper piston (7); the piston rod (9) is a hollow round tube with a thick upper part and a thin lower part, the inner diameter of the thicker part of the upper end is equal to that of the thinner part of the lower end, and the outer diameter of the thicker part of the upper end is larger than that of the thinner part of the lower end; the piston rod (9) is sleeved on the trigger part, and the outer diameter of the piston rod (9) is smaller than the inner diameter of the first return spring (8); the outer diameter of the upper end part of the piston rod (9) is the same as that of the upper piston (7); the upper end surface of the piston rod (9) is fixedly connected with the lower end of the return spring I (8); the piston cylinder (10) is a hollow cylinder, the upper part of the piston cylinder is thick, the lower part of the piston cylinder is thin, the inner diameter of the thick part at the upper end is smaller than that of the thin part at the lower end, and the outer diameter of the thick part at the upper end is equal to that of the thin part at the lower end; a pressure relief groove (35) is formed in the middle of the inner wall of the piston cylinder (10); the inner wall of the upper end of the piston cylinder (10) is in threaded connection with the outer wall of the lower end of the upper cylinder cover (6); the shape and structure of the lower cylinder cover (11) are the same as those of the upper cylinder cover (6), the upper end of the lower cylinder cover (11) is in the shape of a hollow cylinder, and the lower end of the lower cylinder cover is in the shape of a hollow disc; the outer wall of the upper end of the lower cylinder cover (11) is in threaded connection with the inner wall of the lower end of the piston cylinder (10); the inner diameter of the lower cylinder cover (11) is larger than the outer diameter of the thinner part at the lower end of the piston rod (9), and the inner diameter of the lower cylinder cover (11) is smaller than the outer diameter of the thicker part at the upper end of the piston rod (9); the inner diameter of the second return spring (12) is larger than the outer diameter of the piston rod (9); the outer diameter of the second return spring (12) is larger than the inner diameter of the lower cylinder cover (11); the upper end of the second return spring (12) is fixedly connected with the lower end face of the lower cylinder cover (11); the upper end of the impact hammer (13) is in the shape of a hollow disc, the lower end of the impact hammer (13) is in the shape of a hollow cylinder, the inner diameter of the hollow disc at the upper end of the impact hammer (13) is smaller than that of the hollow cylinder at the lower end of the impact hammer (13), and the outer diameter of the hollow disc at the upper end of the impact hammer (13) is equal to that of the hollow cylinder at the lower end; the upper end surface of the impact hammer (13) is fixedly connected with the piston rod (9); the lower end of the second return spring (12) is fixedly connected with the upper end face of the impact hammer (13).

3. The coring drill tool capable of unplugging while drilling of claim 2, wherein: the trigger part includes: the inner cylinder (14), the one-way valve (15), the floating valve shaft (16), the pin (17), the floating valve (18) and the limiting spring (19); the upper end of the inner cylinder (14) is in threaded connection with the lower end of the double-female joint I (1); the lower end of the inner wall of the inner cylinder (14) is provided with a conical seat (20), and a conical through hole is formed in the axis of the conical seat (20); four one-way valves (15) are circumferentially and symmetrically arranged on the circumference of the inner cylinder (14); the floating valve shaft (16) is a round rod with a thick upper part and a thin lower part; the float valve (18) is a conical body, and is provided with a through hole in the axis direction, and the diameter of the through hole is smaller than the diameter of a thick end round rod of the float valve shaft (16) and larger than the diameter of a thin end round rod of the float valve shaft (16); the tip of the float valve (18) faces downwards, and a through hole on the float valve (18) is sleeved on a thin end round rod of the float valve shaft (16); the thick end part of the floating valve shaft (16) is provided with a through hole on the horizontal plane, a pin (17) passes through the through hole, and two ends of the pin (17) are fixed on the inner wall of the inner cylinder (14); the inner diameter of the limiting spring (19) is larger than the diameter of a round rod at the thin end of the floating valve shaft (16) and the inner diameter of a vertical through hole of the floating valve (18), the inner diameter of the limiting spring (19) is smaller than the diameter of the thickest end of the floating valve (18), the limiting spring (19) is sleeved on the round rod at the thin end of the floating valve shaft (16), and the upper end of the limiting spring (19) is in contact with the lower end of the floating valve (18); the shape of the conical inclined plane of the float valve (18) is coincided with the shape of the inclined edge of the conical through hole on the conical seat (20) at the lower end of the inner wall of the inner cylinder (14).

4. The coring drill tool capable of unplugging while drilling of claim 3, wherein: the ball seat comprises a steel ball (21), a ball seat body (22), a second water hole (23) and a conical seat (24); four water holes II (23) are symmetrically formed in the ball seat body (22) in the circumferential direction, and the water holes II (23) penetrate through the inner wall and the outer wall of the ball seat body (22); the upper end of a water hole II (23) on the outer wall of the ball seat body (22) is provided with an external thread, and the external thread and the internal thread at the lower end of the double female joint II form a threaded connection; a conical seat (24) is arranged at the lower end of a water hole II (23) on the inner wall of the ball seat body (22); the steel ball (21) is arranged on the conical seat (24).

5. The coring drill tool capable of unplugging while drilling of claim 4, wherein: the impacted part comprises a fastening ring (25), a limiting ring (26) and an impact joint (27); the height, the inner diameter and the outer diameter of the fastening ring (25) and the limiting ring (26) are the same, the inner wall of the fastening ring (25) is provided with internal threads, and the inner wall of the limiting ring (26) is smooth; the lower end of a water hole in the outer wall of the ball seat body (22) is provided with an external thread, and the fastening ring (25) and the external thread form threaded connection; the impact joint (27) is divided into an upper end part, a middle end part and a lower end part according to different inner diameters, wherein the outer diameters of the upper end part, the middle end part and the lower end part of the impact joint (27) are the same, and the inner diameters are sequentially reduced; the impact joint (27) is sleeved on the ball seat body (22), and the upper end surface of the upper end part of the impact joint (27) is contacted with the lower end surface of the fastening ring (25); the limiting ring (26) is sleeved on the ball seat body (22), and the upper end face of the limiting ring (26) is in contact with the lower end face of the upper end part of the impact joint (27); the wall thickness of the limiting ring (26) is equal to the difference of the inner radius of the upper end part and the middle end part of the impact joint (27); the lower end surface of the limit ring (26) is contacted with the thick and thin variable diameter step at the lower end of the ball seat body (22); the inner wall of the lower end part of the impact joint (27) is in threaded connection with the outer wall of the upper end of the inner pipe (2).

6. The coring drill tool capable of unplugging while drilling of claim 5, wherein: the double female joint II comprises a water hole I (28), a closed groove (29) and a connecting sleeve (30); the cross section of the connecting sleeve (30) is H-shaped; inner threads are arranged on the inner walls of the upper end and the lower end of the connecting sleeve (30); the internal thread of the inner wall of the upper end of the connecting sleeve (30) is in threaded connection with the lower end of the inner cylinder (14); the upper end surface of the middle disc part of the connecting sleeve (30) is provided with a closed groove (29) which is not completely penetrated; the closing groove (29) is in interference fit with the lower end of the float valve shaft (16); the four first water holes (28) are circumferentially and symmetrically arranged at the upper end of the connecting sleeve (30), and the first water holes (28) penetrate through the inner wall and the outer wall of the connecting sleeve (30); the first water hole (28) is positioned at the lower end of the inner cylinder (14) and at the upper end of the middle part of the second double female joint.

7. The coring drill tool capable of unplugging while drilling of claim 6, wherein: the suspension part comprises a bearing seat (31), an upper bearing (32), a lower bearing (33) and a mandrel (34); the upper bearing (32) and the lower bearing (33) are the same in structure size; the mandrel (34) is a cylinder with a thick middle part and two thin ends; the inner wall of the upper bearing (32) is in interference fit with the outer wall of the upper end of the mandrel (34); the inner wall of the lower bearing (33) is in interference fit with the outer wall of the lower end of the mandrel (34); the outer wall of the outer ring of the upper bearing (32) is in interference fit with the inner wall of the upper end of the bearing seat (31); the outer wall of the outer ring of the lower bearing (33) is in interference fit with the inner wall of the lower end of the bearing seat (31); the upper end of the bearing seat (31) is in threaded connection with the lower end of the drill string (4); the shaft axes of the bearing seat (31), the upper bearing (32), the lower bearing (33) and the mandrel (34) are the same line.