CN113464079B - Auxiliary device for drilling core taking pipe and application method thereof - Google Patents
Auxiliary device for drilling core taking pipe and application method thereof Download PDFInfo
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- CN113464079B CN113464079B CN202110858563.4A CN202110858563A CN113464079B CN 113464079 B CN113464079 B CN 113464079B CN 202110858563 A CN202110858563 A CN 202110858563A CN 113464079 B CN113464079 B CN 113464079B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
Abstract
The invention provides an auxiliary device for drilling core taking pipe and a use method thereof, wherein the auxiliary device for drilling core taking pipe comprises a first sleeve connected with a salvaging device, and a plurality of guide drainage grooves are penetrated through the side wall of the first sleeve; a plugging sliding sleeve capable of plugging the guiding drainage groove is movably sleeved on the first sleeve; the first sleeve is provided with a guide mechanism for controlling the plugging sliding sleeve to move; the bottom of the first sleeve is provided with a plugging mechanism capable of plugging the drilling pipe. The auxiliary device for drilling the core tube can timely determine whether the inner tube is landed and locked in place; when coring is completed, operators are timely reminded of salvaging the inner pipe, and the drilling operation efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of drilling salvaging equipment, and particularly relates to an auxiliary device for drilling core taking pipe and a using method thereof.
Background
In the process of drilling and surveying, a series of actions such as storage, locking and unlocking, transferring, taking-in and taking-out, drilling and coring of a drill pipe, replacement of a core pipe, cutting/salvaging/storing of a sample core and the like are required to be completed.
In the Chinese patent of the invention with the publication number of CN108625807A, an engineering exploration rope core drilling tool suitable for a submarine drilling machine is disclosed, and comprises an outer pipe assembly and an inner pipe assembly, wherein the outer pipe assembly comprises a bullet clip blocking head, a bullet clip chamber, an outer pipe, a reamer and a drill bit which are connected in sequence; the inner pipe assembly comprises a spearhead, a spring clip positioning mechanism, a spring clip bracket, a single-acting mechanism, an inner pipe joint, a backwater ball valve, an inner pipe and a core liner pipe; the spearhead is connected with the latch positioning mechanism which is connected with the latch bracket; the side wall of the spring clip bracket is provided with a suspension ring which is arranged on a seat ring on the inner wall of the outer tube; the spring clamping support is connected with the single-acting mechanism, the single-acting mechanism is connected with the inner pipe joint, the lower end of the inner pipe joint is connected with the upper end of the inner pipe, and the core liner tube is arranged in the inner pipe; the single-acting mechanism comprises a mandrel, a sleeve end cover, an upper force transmission clamping sleeve and a lower force transmission clamping sleeve.
The drill pipe of the prior art described above makes it difficult to determine if the inner pipe has landed and locked in place when in use; when coring is completed, operators are difficult to timely remind the inner pipe of salvaging, time is wasted, and drilling operation efficiency is low.
Disclosure of Invention
The present invention is directed to overcoming the difficulty in determining whether the inner tube has landed and locked in place during use in the prior art described above; when coring is completed, operators are difficult to timely remind the inner pipe of salvaging, time is wasted, and the drilling operation efficiency is low.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides an auxiliary device for drilling core taking pipe, which comprises a first sleeve pipe used for being connected with a salvaging device, wherein a plurality of guiding drainage grooves are penetrated through the side wall of the first sleeve pipe; a plugging sliding sleeve capable of plugging the guiding drainage groove is movably sleeved on the first sleeve; the first sleeve is provided with a guide mechanism for controlling the plugging sliding sleeve to move; the bottom of the first sleeve is provided with a plugging mechanism capable of plugging the drilling pipe.
In the invention, the first sleeve is used for being connected with a salvaging device, and the salvaging device, the core taking pipe and an auxiliary device for drilling the core taking pipe form an inner pipe together; the guiding drainage groove is used for introducing high-pressure water injected into the drill pipe from outside into a gap between the inner pipe and the drill pipe, the guiding mechanism is used for controlling the position state of the blocking sliding sleeve, when the inner pipe is landed and locked, the blocking sliding sleeve is in a state of blocking the guiding drainage groove, because the inner pipe needs to continuously inject the high-pressure water into the drill pipe when moving in the drill pipe, when the inner pipe is landed in the drill pipe, the inner pipe cannot continuously move, meanwhile, the blocking sliding sleeve blocks the guiding drainage groove, the high-pressure water cannot leak out, at the moment, the pressure in the drill pipe rises, and a technician is prompted that the inner pipe is landed through a high-pressure signal. And then releasing the pressure in the drill pipe, so that the guide mechanism controls the blocking sliding sleeve to be separated from the blocking guide drainage groove, and the guide drainage groove can introduce high-pressure water between the drill pipe and the inner pipe at proper time, and drilling can be started at the moment. The plugging mechanism is used for plugging the drill pipe when coring is completed so as to promote the water pressure in the drill pipe, and prompts a technician to stop drilling and take out the inner pipe through a high-pressure signal.
Further, the guide mechanism comprises a piston, a first elastic piece and a plurality of pin shafts, the piston is movably arranged in the first sleeve, one end of the first elastic piece is connected with the bottom of the piston, the other end of the first elastic piece is connected with the top of the mounting shaft, the pin shafts are arranged on the piston in a penetrating manner, and two ends of the pin shafts penetrate through the guide drainage grooves and are fixedly connected with the plugging sliding sleeve; the guide drainage groove comprises an initial part, a landing part and a drilling part, the guide drainage groove is blocked by the blocking sliding sleeve under the condition that the pin shaft is positioned at the initial part or the landing part, and the blocking sliding sleeve is separated from the guide drainage groove under the condition that the pin shaft is positioned at the drilling part.
Further, the guiding mechanism further comprises a directional shaft and a counter bore, the directional shaft is arranged at the bottom of the piston, the counter bore is arranged at the top of the mounting shaft, and the counter bore extends towards the rotary sleeve; the directional shaft is movably inserted into the counter bore, the first elastic piece is sleeved on the directional shaft, one end of the first elastic piece is abutted to the bottom of the counter bore, and the other end of the first elastic piece is abutted to the bottom of the piston.
Further, the plugging mechanism comprises an abutting ring, a plurality of elastic rings and gaskets, wherein the abutting ring is sleeved on the mounting shaft, and a gap is formed between the abutting ring and the mounting shaft; the gasket is sleeved on the mounting shaft, the elastic ring is movably sleeved on the mounting shaft, and the elastic ring is positioned at the position between the abutting ring and the gasket.
Further, a thrust bearing is sleeved on the mounting shaft at a position between the abutting ring and the rotating sleeve, one seat ring of the thrust bearing is fixedly connected to one end of the abutting ring, which is far away from the elastic ring, and the other seat ring is fixedly connected to one end of the rotating sleeve, which is close to the elastic ring.
Further, the rotary sleeve comprises a first bearing and a second bearing, wherein the first bearing and the second bearing are sleeved on the mounting shaft, and the first bearing and the second bearing are positioned in the rotary sleeve; the inner ring of the first bearing is fixedly connected with the mounting shaft, and a gap exists between the outer ring and the inner wall of the rotary sleeve; the second bearing is positioned at one end of the first bearing far away from the plugging mechanism, the outer ring of the second bearing is fixedly connected with the inner wall of the rotary sleeve, and a gap exists between the inner ring and the mounting shaft.
Further, a second elastic piece and a stop block are sleeved on the mounting shaft at the position between the first bearing and the second bearing, the second elastic piece is movably sleeved on the mounting shaft, the stop block is positioned at the position, close to the second bearing, of the second elastic piece, the outer wall of the stop block is fixedly connected with the inner wall of the rotary sleeve, and a gap exists between the inner wall of the stop block and the mounting shaft; one end of the second elastic piece is abutted with the bottom of the first bearing, and the other end of the second elastic piece is abutted with the top of the stop block.
Further, a plurality of drain holes are formed in the side wall of the rotary sleeve, and a filtering mechanism for filtering water flowing into the rotary sleeve is arranged at one end, far away from the plugging mechanism, of the drain hole of the rotary sleeve.
Further, the filtering mechanism comprises a flow limiting block, a blocking block and a blocking piece for blocking the blocking block from moving towards the direction of the drain hole; the blocking piece is fixedly arranged in the rotary sleeve, the flow limiting block is arranged at the position, away from the drain hole, of the blocking piece in the rotary sleeve, and the blocking piece is movably arranged at the position between the flow limiting block and the blocking piece; the flow limiting block is provided with a water inlet hole which can be blocked by the blocking block.
In addition, the invention also provides a use method of the auxiliary device for drilling the core tube, which comprises the following steps:
s1, arranging a pin shaft at an initial part, then installing a fishing device on a first sleeve, and installing a coring pipe on a rotary sleeve to obtain an inner pipe;
s2, placing the inner pipe into the drill pipe, injecting high-pressure water into the drill pipe to enable the inner pipe to fall, when the inner pipe lands on a set position at the bottom of the drill pipe and the salvaging device is locked with the drill pipe, the pin shaft moves to a landing part in the guiding drainage groove, at the moment, the water pressure in the drill pipe rises, and a high-pressure signal indicating that the inner pipe lands and the locking is completed is sent out through a pressure detection device in the drill pipe;
s3, releasing the pressure in the drill pipe;
s4, high-pressure water is injected into the drill pipe again, the pin shaft moves to the drilling part in the guide drainage groove, at the moment, the plugging sliding sleeve is separated from the plugging guide drainage groove, and the high-pressure water enters between the drill pipe and the inner pipe through the guide drainage groove, so that drilling can be started;
and S5, when the coring pipe is cored, an elastic ring in the plugging mechanism plugs the gap between the inner pipe and the drill pipe, the pressure in the drill pipe rises, a high-pressure signal indicating the coring completion is sent out through a pressure detection device in the drill pipe, and then the drilling can be stopped, and the inner pipe is taken out.
Compared with the prior art, the invention has the beneficial effects that:
1. when the inner pipe is in a landing locking state, the guide mechanism controls the plugging sliding sleeve to plug the guide drainage groove, so that the water pressure in the drill pipe is increased, and the information that the inner pipe is landed and locked can be transmitted to a technician through a high-pressure signal; when the coring pipe finishes the coring operation, the interior of the coring pipe is filled with soil, at the moment, the coring pipe cannot continue to drill along with the drilling pipe, and the first sleeve still moves towards the direction of the rotating sleeve, so that the first sleeve and the mounting shaft together actuate the blocking mechanism to block the gap between the inner pipe and the drilling pipe, the pressure in the drilling pipe is increased, the information that the coring pipe is finished is transmitted to a technician through a high-pressure signal, the technician is reminded of stopping drilling, and the inner pipe is salvaged;
2. the first bearing and the second bearing can prevent the installation shaft from radial shaking, and meanwhile, the movement of the rotary sleeve is not influenced;
3. the drainage hole can be with getting into the intraductal water discharge part of rotatory cover, prevents to get the core pipe and fills up the back by soil, and the intraductal pressure of drill is violently risen, and filtering mechanism can filter the intraductal water of inflow rotatory, prevents that soil from getting into and causing harmful effects in the rotatory sleeve.
Drawings
FIG. 1 is a schematic view showing the structure of an auxiliary device for drilling a core barrel in embodiment 1 of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic view showing the structure of a first sleeve according to embodiment 1 of the present invention;
FIG. 4 is a flow chart of a method of using the auxiliary device for drilling core tubes of embodiment 2 of the present invention;
FIG. 5 is a structural view of an auxiliary device for drilling a core tube in the step S1 of the embodiment 2 of the present invention;
fig. 6 is a schematic diagram of the position state of the pin in the guiding gutter in step S1 in embodiment 2 of the present invention;
FIG. 7 is a structural view of an auxiliary device for drilling a core tube in the step S2 of the embodiment 2 of the present invention;
fig. 8 is a schematic diagram of the position state of the pin in the guiding gutter in step S2 in embodiment 2 of the present invention;
FIG. 9 is a structural view of an auxiliary device for drilling a core tube in the step S3 of the embodiment 2 of the present invention;
fig. 10 is a schematic view showing a state of the pin in the preliminary position in step S3 in embodiment 2 of the present invention;
fig. 11 is a schematic view showing a state of the pin shaft at the drilling part in step S3 in embodiment 2 of the present invention;
FIG. 12 is a structural view of an auxiliary device for drilling a core tube in the step S4 of the embodiment 2 of the present invention;
fig. 13 is a schematic view showing the position of the pin in the guiding gutter in step S4 of embodiment 2 of the present invention.
The drawings are marked: 1. a first sleeve; 101. a water discharge hole; 2. guiding drainage groove; 201. a start section; 202. a landing part; 203. a preliminary position; 204. a drilling section; 3. plugging the sliding sleeve; 4. a guide mechanism; 401. a piston; 402. a first elastic member; 403. a pin shaft; 404. a fixing pin; 405. a directional axis; 406. countersink; 5. a mounting shaft; 6. a plugging mechanism; 601. an abutment ring; 602. an elastic ring; 603. a gasket; 604. a spacer; 7. a first sleeve; 8. rotating the sleeve; 801. a second sleeve; 802. a third sleeve; 9. a thrust bearing; 10. a first bearing; 11. a second bearing; 12. a lock nut; 13. a backing ring; 14. a limiting block; 15. a second elastic member; 16. a stop block; 17. a drain hole; 18. a filtering mechanism; 181. a flow-limiting block; 182. a block; 183. a blocking member; 184. a water inlet hole; 185. and (5) filtering the sleeve.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there are orientations or positional relationships indicated by terms "upper", "lower", "left", "right", "long", "short", etc., based on the orientations or positional relationships shown in the drawings, this is merely for convenience in describing the present invention and simplifying the description, and is not an indication or suggestion that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration and are not to be construed as limitations of the present patent, and that it is possible for those of ordinary skill in the art to understand the specific meaning of the terms described above according to specific circumstances.
The technical scheme of the invention is further specifically described by the following specific embodiments with reference to the accompanying drawings:
example 1
Referring to fig. 1 to 3, an embodiment of an auxiliary device for drilling core pipe according to the present invention includes a first casing 1 for connection with a fishing device, and a plurality of guide drainage grooves 2 are provided on a sidewall of the first casing 1; a plugging sliding sleeve 3 capable of plugging the guiding drainage groove 2 is movably sleeved on the first sleeve 1; a guide mechanism 4 for controlling the plugging sliding sleeve 3 to move is arranged in the first sleeve 1; the installation axle 5 is installed to the bottom of first sleeve pipe 1, installs the shutoff mechanism 6 that can shutoff drill pipe on the installation axle 5, and installation axle 5 rotates the cover in the position department that shutoff mechanism 6 kept away from first sleeve pipe 1 and is equipped with the rotatory sleeve pipe 8 that the bottom is connected with the core pipe.
Specifically, the first casing 1 is cylindrical, and four water discharge holes 101 are formed in the top of the outer wall of the first casing 1, so that when high-pressure water is injected into the drill pipe, part of the high-pressure water can flow into a gap between the drill pipe and the inner pipe through the water discharge holes 101, and the space in the first casing 1 is prevented from being occupied by the high-pressure water, so that the high-pressure water is not beneficial to being in butt joint with a salvaging device. In this embodiment, the number of the guiding grooves 2 is two, and the guiding grooves are oppositely arranged on the outer wall of the first sleeve 1. The shutoff sliding sleeve 3 is cylindricly, and coaxial slip cap is established on first sleeve pipe 1, and guiding mechanism 4 activity sets up in first sleeve pipe 1, and guiding mechanism 4 is connected with shutoff sliding sleeve 3 through guiding drainage groove 2, along with the pressure variation in the drill pipe, and guiding mechanism 4 can control shutoff sliding sleeve 3 to break away from the state of shutoff guiding drainage groove 2. In this embodiment, the installation shaft 5 is a five-step shaft, and the shaft diameter of the installation shaft 5 is gradually reduced in sequence along the axial direction of the installation shaft 5. The top of the side wall of the first end of the mounting shaft 5 is provided with threads, and the first section of the mounting shaft 5 is inserted at the bottom position of the first sleeve 1 through threaded connection. The first section of the installation shaft 5 is also sleeved with a first shaft sleeve 7, the first shaft sleeve 7 is connected with the first section of the installation shaft 5 through threaded fit, and the first shaft sleeve 7 is positioned on one side of the first sleeve 1, which is close to the shaft shoulder of the first section of the installation shaft 5. The first sleeve 7 can promote the locking positioning strength to the installation shaft 5. The plugging mechanism 6 is sleeved on the second section of the installation shaft 5, and the third section, the fourth section and the fifth section of the installation shaft 5 are all positioned in the rotary sleeve 8.
In one embodiment, the guiding mechanism 4 comprises a piston 401, a first elastic member 402 and a plurality of pin shafts 403, the piston 401 is movably arranged in the first sleeve 1, one end of the first elastic member 402 is connected with the bottom of the piston 401, the other end is connected with the top of the mounting shaft 5, the pin shafts 403 penetrate through the piston 401, and two ends of the pin shafts 403 penetrate through the guiding drainage grooves 2 and are fixedly connected with the plugging sliding sleeve 3; the guiding drainage groove 2 comprises a starting part 201, a landing part 202 and a drilling part 204, the guiding drainage groove 2 is blocked by the blocking sliding sleeve 3 under the condition that the pin shaft 403 is positioned at the starting part 201 or the landing part 202, and the blocking sliding sleeve 3 is separated from the guiding drainage groove 2 under the condition that the pin shaft 403 is positioned at the drilling part 204.
Specifically, the guiding drainage groove 2 includes a start portion 201, a landing portion 202, a preparation position 203 and a drilling portion 204, the start portion 201, the landing portion 202 and the preparation position 203 form a V shape, the start portion 201 and the preparation position 203 are located at two ends of the V shape, the landing portion 202 is located between the start portion 201 and the preparation position 203, and the height of the landing portion 202 is lower than the start portion 201 and the preparation position 203; the preparation position 203 extends in the direction of the rotating sleeve 8 by a vertical groove, i.e. a drilling portion 204 is formed, the height of the drilling portion 204 is lower than the starting portion 201, the landing portion 202 and the preparation position 203. The landing parts 202 on the two guiding drainage grooves 2 on the first sleeve 1 are asymmetrically arranged, and the starting part 201, the preparation position 203 and the drilling part 204 are symmetrically arranged, so that the pin shaft 403 can not reversely move in the process of sliding from the starting part 201 to the preparation position 203, and the principle is similar to that of a pressing pen. In this embodiment, the number of pins is one, two ends of the pin 403 are slidably disposed in the two guiding drainage grooves 2, and two axial side walls of the pin 403 are welded with the inner wall of the plugging sliding sleeve 3. The piston 401 is cylindrical, the pin shaft 403 penetrates through the side wall of the piston 401, and the axis of the pin shaft 403 is perpendicular to the axial direction of the piston 401; a fixing pin 404 for fixing the pin shaft 403 is inserted into the top of the piston 401. The piston 401 is located at the top of the mounting shaft 5, and the first elastic member 402 is located between the mounting shaft 5 and the piston 401, and in this embodiment, the first elastic member 402 is preferably a spring.
When high-pressure water is not injected into the drill pipe, the pin shaft 403 is positioned at the starting part 201 of the guide diversion trench 2, the piston 401 does not compress the first elastic piece 402, when the inner pipe is pushed to a landing and locked in place by the high-pressure water, the pressure in the drill pipe rises because the inner pipe cannot continue to move, and the piston 401 drives the pin shaft 403 to move towards the mounting shaft 5 under the pressure of the high-pressure water, so that the pin shaft 403 slides from the starting part 201 to the landing part 202 in the guide diversion trench 2, and meanwhile, the first elastic piece 402 is compressed; at this time, the technician releases the pressure in the drill pipe, so that the elastic potential energy of the first elastic member 402 is released, the first elastic member 402 actuates the piston 401 to move towards a direction away from the installation shaft 5 by using the elastic restoring force of the first elastic member, and simultaneously, the pin shaft 403 moves from the landing part 202 to the preparation position 203 in the guiding drainage groove 2 under the driving of the piston 401; at this time, high-pressure water is continuously injected into the drill pipe, the piston 401 moves towards the direction of the installation shaft 5 under the action of water pressure again, and drives the pin shaft 403 to move from the preparation position 203 to the drilling part 204 in the guide drainage groove 2, and the pin shaft 403 drives the plugging sliding sleeve 3 to slide to a position lower than the guide drainage groove 2 in the process of moving the pin shaft 403 to the drilling part 204 due to the lower height of the drilling part 204, so that the state of plugging the guide drainage groove 2 is separated, the high-pressure water can enter a gap between the inner pipe and the drill pipe through the guide drainage groove 2, and drilling can be started at this time.
In one embodiment, the guiding mechanism 4 further comprises an orientation shaft 405 and a counter bore 406, the orientation shaft 405 is mounted at the bottom of the piston 401, the counter bore 406 is disposed at the top of the mounting shaft 5, and the counter bore 406 extends towards the rotating sleeve 8; the directional shaft 405 is movably inserted into the counter bore 406, the first elastic member 402 is sleeved on the directional shaft 405, one end of the first elastic member 402 is abutted against the bottom of the counter bore 406, and the other end is abutted against the bottom of the piston 401.
Specifically, the counter bore 406 is coaxially arranged on the top wall of the mounting shaft 5, the counter bore 406 moves towards the direction deviating from the piston 401, the first elastic element 402 is located in the counter bore 406, one end of the first elastic element 402 is abutted with the bottom wall of the counter bore 406, and the other end is abutted with the bottom wall of the piston 401. The directional shaft 405 is coaxially embedded in the bottom wall of the piston 401, the directional shaft 405 is inserted in the counter bore 406, and the first elastic member 402 is sleeved on the directional shaft 405. When the piston 401 moves toward the mounting shaft 5, the directional shaft 405 slides in the counter bore 406 simultaneously, so that the movement of the piston 401 can be guided, and the movement path of the piston 401 is prevented from being skewed.
In one embodiment, the plugging mechanism 6 includes an abutting ring 601, a plurality of elastic rings 602 and a gasket 603, the abutting ring 601 is sleeved on the mounting shaft 5, a gap is reserved between the abutting ring 601 and the rotating sleeve 8, the gasket 603 is sleeved on the mounting shaft 5, the elastic rings 602 are movably sleeved on the mounting shaft 5, and the elastic rings 602 are located at positions between the abutting ring 601 and the gasket 603.
Specifically, the gasket 603 is coaxially and adhesively sleeved at the shaft shoulder between the first section and the second section of the mounting shaft 5, so as to provide a limiting effect for the elastic ring 602. In this embodiment, the elastic rings 602 are preferably rubber rings, the number of the elastic rings 602 is two, a spacer 604 is disposed between the two elastic rings 602, the spacer 604 is circular, and the coaxial movable sleeve is disposed on the mounting shaft 5. The abutting ring 601 is cylindrical and coaxially sleeved on the second section of the mounting shaft 5, one axial side wall of the abutting ring 601 abuts against the elastic ring 602, and the other axial side wall extends to the third section of the mounting shaft 5. When the coring pipe is finished to core, the coring pipe cannot continue to drill along with the drill pipe, and at the moment, the first sleeve 1 and the mounting shaft 5 connected with the first sleeve 1 have a trend of continuing to move towards the direction of the coring pipe, so that the first sleeve 1, the first shaft sleeve 7, the mounting shaft 5 and the gasket 603 squeeze the two elastic rings 602, at the moment, the rotating sleeve 8 cannot move, and the two elastic rings 602 are limited and cannot move, so that radial expansion deformation is generated, and a gap between the drill pipe and the inner pipe is blocked.
In one embodiment, the mounting shaft 5 is sleeved with a thrust bearing 9 at a position between the abutting ring 601 and the rotating sleeve 8, one seat ring of the thrust bearing 9 is fixedly connected with one end of the abutting ring 601 far away from the elastic ring 602, and the other seat ring is fixedly connected with one end of the rotating sleeve 8 near the elastic ring 602.
Specifically, the rotary sleeve 8 includes a second sleeve 801 and a third sleeve 802, an internal thread is provided at the bottom of the inner wall of the second sleeve 801, an external thread is provided at the top of the outer wall of the third sleeve 802, and the second sleeve 801 and the third sleeve 802 are sleeved into the rotary sleeve 8 by the fit of the internal thread and the external thread. The thrust bearing 9 is movably coaxially sleeved on the third section of the mounting shaft 5, one seat ring of the thrust bearing 9 is fixed at the bottom of the inner wall of the abutting ring 601 through interference fit, and the other seat ring of the thrust bearing 9 is fixed at the top of the inner wall of the second sleeve 801 through interference fit.
So set up, when the drill pipe drills, rotatory sleeve pipe 8 is along with drill bit coaxial rotation, and first sleeve pipe 1 is because of being connected with fishing device, can't rotate, and thrust bearing 9 makes rotatory sleeve pipe 8 under the pivoted condition, can not drive the shutoff device, first sleeve pipe 1 is together rotated, and thrust bearing 9 makes rotatory sleeve pipe 8 can push away the butt joint ring 601 under the pivoted condition.
In one embodiment, the rotary sleeve further comprises a first bearing 10 and a second bearing 11, wherein the first bearing 10 and the second bearing 11 are sleeved on the mounting shaft 5, and the first bearing 10 and the second bearing 11 are positioned in the rotary sleeve 8; the inner ring of the first bearing 10 is fixedly connected with the mounting shaft 5, and a gap exists between the outer ring and the inner wall of the rotary sleeve 8; the second bearing 11 is located at one end of the first bearing 10 away from the plugging mechanism 6, an outer ring of the second bearing 11 is fixedly connected with the inner wall of the rotary sleeve 8, and a gap exists between the inner ring and the mounting shaft 5.
Specifically, the first bearing 10 and the second bearing 11 are deep groove ball bearings. The first bearing 10 and the second bearing 11 are coaxially sleeved on the fourth section of the mounting shaft 5, and the first bearing 10 is positioned on one side of the thrust bearing 9 away from the first sleeve 1. The inner wall of the first bearing 10 is in interference fit with the outer wall of the mounting shaft 5, and a gap is formed between the outer wall of the first bearing 10 and the inner wall of the second sleeve 801, so that the first bearing 10 can axially move along with the mounting shaft 5. The outer wall of the second bearing 11 is interference fit with the inner wall of the third sleeve 802 with a gap between the inner wall of the second bearing 11 and the mounting shaft 5, so that the second bearing 11 can not affect the axial movement of the mounting shaft 5. The fifth section of the installation shaft 5 is coaxially sleeved with a lock nut 12 through threaded fit, a backing ring 13 is sleeved between the lock nut 12 and the shaft shoulder of the fifth section of the installation shaft 5, and the backing ring 13 is clamped and fixed by the lock nut 12 and the shaft shoulder of the fifth section of the installation shaft 5. The inner wall of the third sleeve 802 protrudes toward the axis to form an annular stopper 14, and the second bearing 11 is clamped by the backing ring 13 and the stopper 14, so that the second bearing 11 can be maintained at the current position without axial play.
By this arrangement, the first and second bearings 10 and 11 can restrict the radial degree of freedom of the mounting shaft 5 without affecting the axial degree of freedom of the mounting shaft 5, and prevent the mounting shaft 5 from rocking in the radial direction.
In one embodiment, the second elastic member 15 and the stop block 16 are sleeved on the mounting shaft 5 at the position between the first bearing 10 and the second bearing 11, the second elastic member 15 is movably sleeved on the mounting shaft 5, the stop block 16 is positioned at the position of the second elastic member 15 close to the second bearing 11, the outer wall of the stop block 16 is fixedly connected with the inner wall of the rotary sleeve 8, and a gap exists between the inner wall of the stop block 16 and the mounting shaft 5; one end of the second elastic member 15 abuts against the bottom of the first bearing 10, and the other end abuts against the top of the stopper 16.
Specifically, the fourth section of the mounting shaft 5 is movably sleeved with a second elastic member 15 and a stop 16 coaxially between the first bearing 10 and the second bearing 11, the second elastic member 15 is preferably a spring, the stop 16 is shaped like a Chinese character 'tu', the top of the stop 16 extends towards the direction of the first bearing 10, the second elastic member 15 is sleeved on the stop 16, one end of the second elastic member 15 is abutted against the bottom wall of the first bearing 10, the other end is abutted against the stop 16, and the bottom wall of the stop 16 is abutted against the axial top wall of the third sleeve 802. The second elastic member 15 can prevent the first bearing 10 from moving axially until the coring pipe has completed coring; when coring is completed, the first bearing 10 moves with the mounting shaft 5 towards the rotating sleeve 8 while pressing the second elastic member 15, at which time the second elastic member 15 provides a certain buffer, preventing the components moving axially of the mounting shaft 5, the first sleeve 1, etc. from moving too fast.
In one embodiment, the side wall of the rotary sleeve 8 is provided with a plurality of drain holes 17, and the rotary sleeve 8 is provided with a filtering mechanism 18 at one end of the drain holes 17 away from the plugging mechanism 6 for filtering the water flowing into the rotary sleeve 8.
Specifically, the drain holes 17 are formed in the third sleeve 802, the number of the drain holes 17 is preferably two, the two drain holes 17 are symmetrically formed in the outer wall of the third sleeve 802, and the drain holes 17 are located at one side of the lock nut 12 away from the first bearing 10. The filter mechanism 18 is mounted to the bottom of the third sleeve 802. The drain hole 17 can prevent the pressure in the drill pipe from rising too fast by the water that flows back into the third sleeve 802 from the coring pipe when the coring pipe is filled, and the filter mechanism 18 can filter the water flowing into the third sleeve 802 to prevent dirt such as soil from contaminating the rest of the auxiliary devices in the present invention.
In one embodiment, the filter mechanism 18 includes a restrictor block 181, a blocking block 182, and a blocking member 183 for blocking movement of the blocking block 182 toward the drain hole 17; the blocking piece 183 is fixedly arranged in the rotary sleeve 8, the flow limiting block 181 is arranged at the position, away from the drain hole 17, of the blocking piece 183 in the rotary sleeve 8, and the blocking piece 182 is movably arranged at the position between the flow limiting block 181 and the blocking piece 183; the flow limiting block 181 is provided with a water inlet hole 184 which can be blocked by the blocking block 182.
Specifically, the filter mechanism 18 further includes a filter sleeve 185, an inner thread is provided on the top of the outer wall of the filter sleeve 185, an outer thread is provided on the bottom of the outer wall of the third sleeve 802, and the filter sleeve 185 is connected to the third sleeve 802 by screw-fit. The current limiting block 181 is cylindric, and the recess is seted up at the top of current limiting block 181, and spheroidal shutoff piece 182 activity sets up in the recess, and circular inlet port 184 has been seted up to the diapire coaxial of current limiting block 181, and the aperture of inlet port 184 is less than the radius of shutoff piece 182, and when shutoff piece 182 and the diapire butt of current limiting block 181, shutoff piece 182 will inlet port 184 jam. The blocking piece 183 is cylindrical, the axial direction of the blocking piece 183 is perpendicular to the axial direction of the rotary sleeve 8, two ends of the blocking piece 183 are welded on the inner wall of the third sleeve 802, and the blocking piece 183 plays a limiting role on the blocking block 182. The bottom of the inner wall of the filter sleeve 185 is provided with internal threads for connection to a coring tube.
So set up, when getting the core pipe and being filled up, the mixture of soil and water gets into filter sleeve 185, passes inlet opening 184 simultaneously, and soil is stopped by shutoff piece 182 this moment, and rivers can then flow into third sleeve 802 through the clearance between shutoff piece 182 and the restriction piece 181, can realize effectively filtering the effect of backward flow to the interior rivers of third sleeve 802.
Example 2
Referring to fig. 4 to 13, in an embodiment of the method for using the auxiliary device for drilling a core pipe according to embodiment 1 of the present invention, the auxiliary device of the present invention needs to be assembled with the fishing device and the core pipe to form an inner pipe when in use, and the inner pipe is placed into the drill pipe to form a complete drilling core pipe.
The method comprises the following steps:
s1, referring to fig. 4, 5 and 6, a pin shaft 403 is arranged at an initial part 201 of a guide drainage groove 2, then a fishing device is arranged on a first sleeve 1, and a core tube is arranged on a filter sleeve 185, so that an inner tube is obtained;
s2, referring to fig. 4, 7 and 8, the inner pipe is placed in the drill pipe, high-pressure water is injected into the drill pipe through the fluid control valve, the inner pipe is dropped, when the inner pipe lands at a proper position at the bottom of the drill pipe and the fishing device is locked with the inner wall of the drill pipe, the pin shaft 403 moves to the landing part 202 in the guiding drainage groove 2, at the moment, the water pressure in the drill pipe rises, the pressure detection device sends out a high-pressure signal indicating that the inner pipe lands and the fishing device is locked with the drill pipe;
the pressure detecting device may be any device that has a function of detecting pressure and sending a prompt signal, and in this embodiment, it is preferable to use a fluid control valve, which can control high-pressure water injected into the drill pipe, and can detect the pressure in the drill pipe.
S3, referring to FIGS. 4, 9, 10 and 11, the technician releases the pressure in the drill pipe, and at this time, the pin 403 moves to the preparation position 203 of the guiding gutter 2 under the elastic restoring force of the first elastic member 402;
s4, high-pressure water is injected into the drill pipe through the fluid control valve again, at the moment, the pin shaft 403 moves to the drilling part 204 in the guide drainage groove 2, meanwhile, the plugging sliding sleeve 3 is separated from the state of plugging the guide drainage groove 2, and the high-pressure water enters between the drill pipe and the inner pipe through the guide drainage groove 2, so that drilling can be started;
s5, referring to fig. 4, 12 and 13, when the coring pipe is coring, the first sleeve 1, the mounting shaft 5, the first shaft sleeve 7 and the gasket 603 move towards the rotary sleeve 8, the elastic ring 602 is compressed and deformed, a gap between the inner pipe and the drill pipe is blocked, the pressure in the drill pipe rises, the pressure detection device sends a high-pressure signal indicating that the coring is finished, drilling can be stopped at this time, and a technician takes out the inner pipe through the fishing device.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (6)
1. The auxiliary device for drilling core pipe is characterized by comprising a first sleeve (1) used for being connected with a salvaging device, wherein a plurality of guide drainage grooves (2) are formed in the side wall of the first sleeve (1) in a penetrating manner; a blocking sliding sleeve (3) capable of blocking the guide drainage groove (2) is movably sleeved on the first sleeve (1); a guide mechanism (4) for controlling the plugging sliding sleeve (3) to move is arranged on the first sleeve (1); a plugging mechanism (6) capable of plugging the drilling pipe is arranged at the bottom of the first sleeve (1);
the plugging mechanism (6) comprises an abutting ring (601), a plurality of elastic rings (602) and gaskets (603); the abutting ring (601), the elastic rings (602) and the gaskets (603) are movably sleeved on the mounting shaft (5) from bottom to top in sequence;
the guiding drainage groove (2) comprises a starting part (201), a landing part (202) and a drilling part (204); a mounting shaft (5) is arranged at the bottom of the first sleeve (1), and the mounting shaft (5) is positioned below the guide drainage groove (2); the guide mechanism (4) comprises a first elastic piece (402) and a plurality of pin shafts (403), the first elastic piece (402) is positioned between the guide drainage groove (2) and the installation shaft (5), one end of the first elastic piece (402) is connected with the bottom of the pin shaft (403), the other end of the first elastic piece is connected with the top of the installation shaft (5), and two ends of the pin shaft (403) penetrate through the guide drainage groove (2) and are fixedly connected with the blocking sliding sleeve (3); under the condition that the pin shaft (403) is positioned at the starting part (201) or the landing part (202), the blocking sliding sleeve (3) covers the guiding drainage groove (2), and the guiding drainage groove (2) is blocked; under the condition that the pin shaft (403) is positioned at the drilling part (204), the plugging sliding sleeve (3) is separated from the guiding drainage groove (2);
the guide mechanism (4) further comprises a piston (401), a directional shaft (405) and a counter bore (406), the piston (401) is movably arranged in the first sleeve (1), the piston is positioned above the mounting shaft (5), and the pin shaft (403) penetrates through the piston (401); the directional shaft (405) is arranged at the bottom of the piston (401), and the counter bore (406) is arranged at the top of the mounting shaft (5); the directional shaft (405) is movably inserted into the counter bore (406), the first elastic piece (402) is sleeved on the directional shaft (405), one end of the first elastic piece (402) is abutted to the bottom of the counter bore (406), and the other end of the first elastic piece is abutted to the bottom of the piston (401).
2. The auxiliary device for a drill core tube according to claim 1, further comprising a rotating sleeve (8) for connection with the core tube, the rotating sleeve (8) being mounted on the mounting shaft (5) on the side of the plugging mechanism (6) remote from the first sleeve (1); the thrust bearing (9) is sleeved on the mounting shaft (5), one seat ring of the thrust bearing (9) is connected with the plugging mechanism (6), and the other seat ring is fixedly connected to one end, close to the plugging mechanism (6), of the rotary sleeve (8).
3. The auxiliary device for drilling core pipe according to claim 2, further comprising a first bearing (10) and a second bearing (11), wherein the first bearing (10) and the second bearing (11) are sleeved on the mounting shaft (5), and the first bearing (10) and the second bearing (11) are positioned in the rotary sleeve (8); an inner ring of the first bearing (10) is fixedly connected with the mounting shaft (5), and a gap exists between an outer ring and the inner wall of the rotary sleeve (8); the second bearing (11) is positioned at one end of the first bearing (10) far away from the plugging mechanism (6), the outer ring of the second bearing (11) is fixedly connected with the inner wall of the rotary sleeve (8), and a gap exists between the inner ring and the mounting shaft (5).
4. An auxiliary device for a drill core tube according to claim 3, characterized in that the mounting shaft (5) is sleeved with a second elastic member (15) and a stop block (16) at a position between the first bearing (10) and the second bearing (11), the second elastic member (15) is movably sleeved on the mounting shaft (5), the stop block (16) is positioned at a position where the second elastic member (15) is close to the second bearing (11), the outer wall of the stop block (16) is fixedly connected with the inner wall of the rotary sleeve (8), and a gap exists between the inner wall of the stop block (16) and the mounting shaft (5); one end of the second elastic piece (15) is abutted with the bottom of the first bearing (10), and the other end is abutted with the top of the stop block (16).
5. The auxiliary device for drilling core pipe according to any of the claims 2-4, characterized in that the side wall of the rotating sleeve (8) is provided with a number of drain holes (17), and that the bottom of the rotating sleeve is provided with a filter means (18) for filtering the water flowing into the rotating sleeve (8).
6. The auxiliary device for a drill core tube according to claim 5, characterized in that the filter means (18) comprises a flow restriction block (181), a blocking block (182) and a blocking member (183) for blocking the movement of the blocking block (182) towards the drain hole (17); the blocking piece (183) is fixedly arranged in the rotary sleeve (8), the current limiting block (181) is arranged below the blocking piece (183) in the rotary sleeve (8), and the blocking block (182) is movably arranged between the current limiting block (181) and the blocking piece (183); the flow limiting block (181) is provided with a water inlet (184) which can be blocked by a blocking block (182).
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| CN202110858563.4A CN113464079B (en) | 2021-07-28 | 2021-07-28 | Auxiliary device for drilling core taking pipe and application method thereof |
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| CN202110858563.4A CN113464079B (en) | 2021-07-28 | 2021-07-28 | Auxiliary device for drilling core taking pipe and application method thereof |
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