CN212054620U - Controllable dissolving mechanism of downhole tool - Google Patents
Controllable dissolving mechanism of downhole tool Download PDFInfo
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- CN212054620U CN212054620U CN201922035444.XU CN201922035444U CN212054620U CN 212054620 U CN212054620 U CN 212054620U CN 201922035444 U CN201922035444 U CN 201922035444U CN 212054620 U CN212054620 U CN 212054620U
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Abstract
The utility model discloses a controllable dissolving mechanism of a downhole tool, which comprises an upper joint, a lower joint and a dissolving part, wherein one end of the upper joint is connected with one end of the lower joint, the other ends of the upper joint and the lower joint are respectively connected with a sleeve or an oil pipe, the dissolving part is sleeved at one end of the lower joint close to the upper joint, wherein one end of the dissolving component close to the upper joint is clamped at the joint of the upper joint and the lower joint, the upper joint, the lower joint and the dissolving component are all in cylindrical annular structures and are coaxial, wherein the aperture of the inner through hole at one end of the lower joint close to the upper joint is larger than the outer diameter of the dissolving part at one end close to the upper joint, when the dissolution part needs to be dissolved, the part clamped at the joint of the upper joint and the lower joint can be cut off under the pressurization condition by throwing the working ball in the casing or the oil pipe, and then the rest part of the dissolution part can move to the side far away from the upper joint along with the working ball.
Description
Technical Field
The utility model belongs to the technical field of the oil field drilling and production instrument, especially, relate to a controllable mechanism that dissolves of downhole tool can be used to the control of soluble downhole tool such as soluble ball seat, sliding sleeve core and dissolve the design.
Background
The soluble downhole tool is a revolutionary technology in the petroleum industry in recent years, and has the remarkable advantages of self-degradation, intervention-free recovery of the drift diameter of a shaft, simplification of operation procedures, reduction of operation cost and the like, so that the soluble downhole tool is rapidly developed in an oil field, and the soluble bridge plug, the soluble ball seat, the soluble plug, the soluble sliding sleeve and the like are frequently applied at present.
At present, the dissolving process of the soluble downhole tool is difficult to control manually, and the tool begins to dissolve after being contacted with liquid in a well after being put into the well, so that the operation is required to be completed in a short time after the tool is put into the well so as to prevent the tool from being failed due to dissolution. Researchers in this industry have proposed the idea of isolating soluble materials from the dissolution medium by means of a barrier coating, thereby preventing dissolution from occurring. Patent 201811035206 discloses a method for preparing a surface protective layer of a fracturing ball made of a casting soluble magnesium alloy composite material, and discloses a method for preparing a surface protective layer of a fracturing ball made of a casting soluble magnesium alloy composite material, wherein a stirring casting method is adopted to prepare floating beads/magnesiumCasting fracturing ball from soluble composite alloy material by using Na2SiO3And the mixed aqueous solution of KOH and the electrolyte and optimized technological parameters are used for carrying out micro-arc oxidation treatment on the surface of the mechanically processed fracturing ball. The fracturing ball after micro-arc oxidation treatment is soaked by a mixed solution of 1% by volume of heptadecafluorodecyltriethoxysilane and isopropanol fluorination treatment, so that the surface has a hydrophobic function, but no specific scheme is provided for how to make an isolation coating fail and make a downhole tool recover to be dissolved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art not enough, provide a controllable mechanism that dissolves of downhole tool, overcome among the prior art 1: the dissolving process of the existing soluble downhole tool is difficult to control manually, and the tool starts to dissolve after contacting with liquid in a well after entering the well; 2: the existing soluble downhole tool needs to complete operation in a short period of time after entering the well, otherwise the soluble downhole tool fails; 3: the prior art does not provide a scheme for making an isolation coating fail and making a downhole tool recover dissolution.
In order to solve the technical problem, the technical scheme of the utility model is that: a controllable dissolving mechanism of a downhole tool comprises an upper joint, a lower joint and a dissolving component, wherein one end of the upper joint is connected with one end of the lower joint, wherein the other ends of the upper joint and the lower joint are respectively connected with a sleeve or an oil pipe, the dissolving part is sleeved at one end of the lower joint close to the upper joint, wherein one end of the dissolving component close to the upper joint is clamped at the joint of the upper joint and the lower joint, the upper joint, the lower joint and the dissolving component are all in cylindrical annular structures and are coaxial, wherein the aperture of the inner through hole at one end of the lower joint close to the upper joint is larger than the outer diameter of the dissolving part at one end close to the upper joint, when the dissolution part needs to be dissolved, the part clamped at the joint of the upper joint and the lower joint can be cut off under the pressurization condition by throwing the working ball in the casing or the oil pipe, and then the rest part of the dissolution part can move to the side far away from the upper joint along with the working ball.
Preferably, one end of the upper joint, which is far away from the lower joint, is provided with an internal thread, wherein the internal thread is matched with a casing or an oil pipe connected with the internal thread, the aperture of an inner through hole of the upper joint is the same as that of the casing or the oil pipe connected with the upper joint, one end of the upper joint, which is close to the lower joint, is provided with a trapezoidal external thread, and the trapezoidal external thread is matched and connected with a trapezoidal internal thread of the lower joint, which is close to one end of the upper joint.
Preferably, one end of the trapezoidal external thread of the upper joint, which is close to the lower joint, is also provided with a smooth section, wherein the smooth section is provided with two sealing ring grooves, and sealing rings are arranged in the sealing ring grooves.
Preferably, one end of the lower joint close to the upper joint is uniformly provided with pin through holes along the circumferential direction, wherein the pin through holes are internally provided with anti-rotation pins, and the anti-rotation pins fixedly connect the upper joint and the lower joint.
Preferably, trapezoidal internal thread of lower clutch is equipped with straight hole in the first, straight hole in the second, straight hole in first taper hole and the straight hole in the third in proper order along the direction of keeping away from the top connection, wherein the straight hole in the first, straight hole in the second, the aperture of straight hole in first taper hole and the third reduces in proper order, wherein the aperture of first taper hole reduces along with the direction of keeping away from the top connection gradually, wherein the straight hole in the first of lower clutch and the light section of top connection pass through the sealing washer sealed, be equipped with annular groove between the tip of top connection and the straight hole in the second of lower clutch, wherein dissolve the one end joint in annular groove department of part, the one end that the top connection was kept away from to the lower clutch is equipped with the external screw thread, wherein this external screw thread and its sleeve pipe or oil pipe looks adaptation of connecting.
Preferably, the dissolution part comprises a dissolution part shearing ring and a dissolution part body which are integrally formed, wherein the size of the dissolution part shearing ring is matched with the annular groove, and the dissolution part shearing ring is clamped at the annular groove.
Preferably, the through hole in the dissolution part comprises a first oblique chamfer through hole, a fourth inner straight hole and a second oblique chamfer through hole which are sequentially communicated, wherein the aperture of the first oblique chamfer through hole is gradually reduced along with the direction away from the upper joint, the aperture of the second oblique chamfer through hole is gradually increased along with the direction away from the upper joint, the outer circumference of the dissolution part body comprises a cylindrical section and a conical section, the size of the cylindrical section is smaller than that of the shear ring of the dissolution part, and the size of the conical section is gradually reduced along with the direction away from the upper joint.
Preferably, the inner through hole aperture of the dissolving part is smaller than that of the upper connector, the taper of the conical surface section of the dissolving part is the same as that of the first conical hole of the lower connector, the dissolving part is made of a soluble material, the inner surface and the outer surface of the dissolving part are both wrapped by a dissolution resistant coating, and the size of the shearing ring of the dissolving part is in direct proportion to the size of the designed shearing force.
Preferably, the aperture of the second inner straight hole of the lower joint is larger than the size of the cylindrical section of the dissolution part, when the dissolution part needs to be dissolved, the shearing ring of the dissolution part and the dissolution part body can be completely sheared under the pressurization condition by throwing a working ball in a casing or an oil pipe, the dissolution part body moves towards one side far away from the upper joint, and the diameter of the working ball is smaller than the aperture of the first inclined chamfer through hole and is larger than the aperture of the fourth inner straight hole.
Compared with the prior art, the utility model has the advantages of:
(1) the utility model provides a controllable dissolving mechanism of a downhole tool, which comprises an upper joint, an anti-rotation pin, a sealing ring, a lower joint and a dissolving part, when the dissolution part is needed to be dissolved, a working ball or other plug is put into the inlet of the construction casing or the oil pipe and falls to the upper end of the dissolution part through liquid pumping or self weight, sealing with the dissolving component, pressurizing the wellbore to completely shear the shearing ring of the dissolving component and the dissolving component body, destroying the complete dissolution-resistant coating of the dissolving component, dissolving the material in the dissolving component by contacting with the dissolving solution, dissolving the material completely, the construction casing or the oil pipe recovers the full drift diameter, and good working condition is created for later operation, the controllable dissolving mechanism of the underground tool can be used for operations such as fracturing packer, pitching plugging and the like, and has the advantages of controllable dissolving, full drift diameter maintenance of the pipe column after dissolving and the like;
(2) after the dissolution part shearing ring and the dissolution part body of the dissolution part are completely sheared, the dissolution part body goes down and forms sealing with a working ball or a blanking plug and a first taper hole of a lower connector, and the requirements of pressure-bearing working conditions (such as fracturing, shaft pressure testing, packer pressing and setting and the like) can be still met within a certain time;
(3) the utility model discloses controllable mechanism that dissolves of downhole tool simple structure, convenient to use, practicality are strong, and controllability can be high, but wide application in the control of soluble downhole tool such as instruments such as soluble ball seat, sliding sleeve core dissolve the design.
Drawings
FIG. 1 is a schematic structural view of a controllable dissolving mechanism of a downhole tool in an original state according to the present invention;
FIG. 2 is a schematic diagram of a structure of a dissolution part of a controllable dissolution mechanism of a downhole tool after shearing;
fig. 3 is a schematic structural diagram of the dissolution part of the controllable dissolution mechanism of the downhole tool after being completely dissolved.
Description of reference numerals:
1-an upper joint, 2-an anti-rotation pin, 3-a sealing ring, 4-a lower joint, 5-a dissolving component, 6-a working ball, 7-a first inner straight hole, 8-a second inner straight hole, 9-a first taper hole, 10-a third inner straight hole, 11-a first oblique chamfer through hole, 12-a fourth inner straight hole and 13-a second oblique chamfer through hole;
41-an annular groove;
51-dissolution part shear ring, 52-dissolution part body.
Detailed Description
The following description of the embodiments of the present invention is provided in connection with the following embodiments:
it should be noted that the structures, ratios, sizes, etc. illustrated in the present specification are only used to cooperate with the contents disclosed in the specification for the understanding and reading of the people skilled in the art, and are not used to limit the limit conditions that the present invention can be implemented, and any modifications of the structures, changes of the ratio relationships or adjustments of the sizes should still fall within the scope that the technical contents disclosed in the present invention can cover without affecting the functions and the achievable purposes of the present invention.
Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
Example 1
As shown in figures 1-3, the utility model discloses a controllable dissolving mechanism of downhole tool, comprising an upper joint 1, a lower joint 4 and a dissolving component 5, wherein one end of the upper joint 1 is connected with one end of the lower joint 4, the other ends of the upper joint 1 and the lower joint 4 are respectively connected with a sleeve or an oil pipe, the dissolving component 5 is sleeved at one end of the lower joint 4 close to the upper joint 1, one end of the dissolving component 5 close to the upper joint 1 is clamped at the joint of the upper joint 1 and the lower joint 4, the upper joint 1, the lower joint 4 and the dissolving component 5 are all in a cylindrical annular structure and are coaxial, the aperture of an inner through hole of the lower joint 4 close to one end of the upper joint 1 is larger than the outer diameter of the dissolving component 5 close to one end of the upper joint 1, when the dissolving component 5 needs to be dissolved, the joint part of the upper joint 1 and the lower joint 4 can be cut off under the pressurizing condition by throwing a working ball 6 in, the remaining part of the dissolution part 5 can then move with the working ball 6 to the side remote from the upper joint 1.
Example 2
As shown in figures 1-3, the utility model discloses a controllable dissolving mechanism of downhole tool, comprising an upper joint 1, a lower joint 4 and a dissolving component 5, wherein one end of the upper joint 1 is connected with one end of the lower joint 4, the other ends of the upper joint 1 and the lower joint 4 are respectively connected with a sleeve or an oil pipe, the dissolving component 5 is sleeved at one end of the lower joint 4 close to the upper joint 1, one end of the dissolving component 5 close to the upper joint 1 is clamped at the joint of the upper joint 1 and the lower joint 4, the upper joint 1, the lower joint 4 and the dissolving component 5 are all in a cylindrical annular structure and are coaxial, the aperture of an inner through hole of the lower joint 4 close to one end of the upper joint 1 is larger than the outer diameter of the dissolving component 5 close to one end of the upper joint 1, when the dissolving component 5 needs to be dissolved, the joint part of the upper joint 1 and the lower joint 4 can be cut off under the pressurizing condition by throwing a working ball 6 in, the remaining part of the dissolution part 5 can then move with the working ball 6 to the side remote from the upper joint 1.
Preferably, as shown in fig. 1 to 3, an internal thread is provided at one end of the upper joint 1 away from the lower joint 4, wherein the internal thread is adapted to a casing or an oil pipe connected to the internal thread, the inner through hole of the upper joint 1 has the same diameter as that of the casing or the oil pipe connected to the upper joint, a trapezoidal external thread is provided at one end of the upper joint 1 close to the lower joint 4, and the trapezoidal external thread is adapted to the trapezoidal internal thread at one end of the lower joint 4 close to the upper joint 1.
Example 3
As shown in figures 1-3, the utility model discloses a controllable dissolving mechanism of downhole tool, comprising an upper joint 1, a lower joint 4 and a dissolving component 5, wherein one end of the upper joint 1 is connected with one end of the lower joint 4, the other ends of the upper joint 1 and the lower joint 4 are respectively connected with a sleeve or an oil pipe, the dissolving component 5 is sleeved at one end of the lower joint 4 close to the upper joint 1, one end of the dissolving component 5 close to the upper joint 1 is clamped at the joint of the upper joint 1 and the lower joint 4, the upper joint 1, the lower joint 4 and the dissolving component 5 are all in a cylindrical annular structure and are coaxial, the aperture of an inner through hole of the lower joint 4 close to one end of the upper joint 1 is larger than the outer diameter of the dissolving component 5 close to one end of the upper joint 1, when the dissolving component 5 needs to be dissolved, the joint part of the upper joint 1 and the lower joint 4 can be cut off under the pressurizing condition by throwing a working ball 6 in, the remaining part of the dissolution part 5 can then move with the working ball 6 to the side remote from the upper joint 1.
Preferably, as shown in fig. 1 to 3, an internal thread is provided at one end of the upper joint 1 away from the lower joint 4, wherein the internal thread is adapted to a casing or an oil pipe connected to the internal thread, the inner through hole of the upper joint 1 has the same diameter as that of the casing or the oil pipe connected to the upper joint, a trapezoidal external thread is provided at one end of the upper joint 1 close to the lower joint 4, and the trapezoidal external thread is adapted to the trapezoidal internal thread at one end of the lower joint 4 close to the upper joint 1.
Preferably, as shown in fig. 1 to 3, a smooth section is further disposed at one end of the trapezoidal external thread of the upper joint 1, which is close to the lower joint 4, wherein two sealing ring grooves are disposed on the smooth section, and a sealing ring 3 is disposed in each sealing ring groove.
Preferably, as shown in fig. 1-3, pin through holes are uniformly distributed in the circumferential direction at one end of the lower joint 4 close to the upper joint 1, wherein anti-rotation pins 2 are arranged in the pin through holes, and the upper joint 1 and the lower joint 4 are fixedly connected by the anti-rotation pins 2.
Example 4
As shown in figures 1-3, the utility model discloses a controllable dissolving mechanism of downhole tool, comprising an upper joint 1, a lower joint 4 and a dissolving component 5, wherein one end of the upper joint 1 is connected with one end of the lower joint 4, the other ends of the upper joint 1 and the lower joint 4 are respectively connected with a sleeve or an oil pipe, the dissolving component 5 is sleeved at one end of the lower joint 4 close to the upper joint 1, one end of the dissolving component 5 close to the upper joint 1 is clamped at the joint of the upper joint 1 and the lower joint 4, the upper joint 1, the lower joint 4 and the dissolving component 5 are all in a cylindrical annular structure and are coaxial, the aperture of an inner through hole of the lower joint 4 close to one end of the upper joint 1 is larger than the outer diameter of the dissolving component 5 close to one end of the upper joint 1, when the dissolving component 5 needs to be dissolved, the joint part of the upper joint 1 and the lower joint 4 can be cut off under the pressurizing condition by throwing a working ball 6 in, the remaining part of the dissolution part 5 can then move with the working ball 6 to the side remote from the upper joint 1.
Preferably, as shown in fig. 1 to 3, an internal thread is provided at one end of the upper joint 1 away from the lower joint 4, wherein the internal thread is adapted to a casing or an oil pipe connected to the internal thread, the inner through hole of the upper joint 1 has the same diameter as that of the casing or the oil pipe connected to the upper joint, a trapezoidal external thread is provided at one end of the upper joint 1 close to the lower joint 4, and the trapezoidal external thread is adapted to the trapezoidal internal thread at one end of the lower joint 4 close to the upper joint 1.
Preferably, as shown in fig. 1 to 3, a smooth section is further disposed at one end of the trapezoidal external thread of the upper joint 1, which is close to the lower joint 4, wherein two sealing ring grooves are disposed on the smooth section, and a sealing ring 3 is disposed in each sealing ring groove.
Preferably, as shown in fig. 1-3, pin through holes are uniformly distributed in the circumferential direction at one end of the lower joint 4 close to the upper joint 1, wherein anti-rotation pins 2 are arranged in the pin through holes, and the upper joint 1 and the lower joint 4 are fixedly connected by the anti-rotation pins 2.
Preferably, as shown in fig. 1 to 3, a trapezoidal internal thread of the lower joint 4 is sequentially provided with a first internal straight hole 7, a second internal straight hole 8, a first taper hole 9 and a third internal straight hole 10 along a direction away from the upper joint 1, wherein the diameters of the first internal straight hole 7, the second internal straight hole 8, the first taper hole 9 and the third internal straight hole 10 are sequentially reduced, wherein the diameter of the first taper hole 9 is gradually reduced along the direction away from the upper joint 1, wherein the first internal straight hole 7 of the lower joint 4 and the optical section of the upper joint 1 are sealed by the sealing ring 3, an annular groove 41 is provided between the end of the upper joint 1 and the second internal straight hole 8 of the lower joint 4, wherein one end of the dissolution component 5 is clamped at the annular groove 41, and one end of the lower joint 4 away from the upper joint 1 is provided with an external thread, wherein the external thread is adapted to a casing or an oil pipe connected thereto.
Preferably, as shown in fig. 1-2, the dissolution part 5 comprises a dissolution part shearing ring 51 and a dissolution part body 52 which are integrally formed, wherein the size of the dissolution part shearing ring 51 is matched with that of the annular groove 41, and the dissolution part shearing ring 51 is clamped at the annular groove 41.
Example 5
As shown in figures 1-3, the utility model discloses a controllable dissolving mechanism of downhole tool, comprising an upper joint 1, a lower joint 4 and a dissolving component 5, wherein one end of the upper joint 1 is connected with one end of the lower joint 4, the other ends of the upper joint 1 and the lower joint 4 are respectively connected with a sleeve or an oil pipe, the dissolving component 5 is sleeved at one end of the lower joint 4 close to the upper joint 1, one end of the dissolving component 5 close to the upper joint 1 is clamped at the joint of the upper joint 1 and the lower joint 4, the upper joint 1, the lower joint 4 and the dissolving component 5 are all in a cylindrical annular structure and are coaxial, the aperture of an inner through hole of the lower joint 4 close to one end of the upper joint 1 is larger than the outer diameter of the dissolving component 5 close to one end of the upper joint 1, when the dissolving component 5 needs to be dissolved, the joint part of the upper joint 1 and the lower joint 4 can be cut off under the pressurizing condition by throwing a working ball 6 in, the remaining part of the dissolution part 5 can then move with the working ball 6 to the side remote from the upper joint 1.
Preferably, as shown in fig. 1 to 3, an internal thread is provided at one end of the upper joint 1 away from the lower joint 4, wherein the internal thread is adapted to a casing or an oil pipe connected to the internal thread, the inner through hole of the upper joint 1 has the same diameter as that of the casing or the oil pipe connected to the upper joint, a trapezoidal external thread is provided at one end of the upper joint 1 close to the lower joint 4, and the trapezoidal external thread is adapted to the trapezoidal internal thread at one end of the lower joint 4 close to the upper joint 1.
Preferably, as shown in fig. 1 to 3, a smooth section is further disposed at one end of the trapezoidal external thread of the upper joint 1, which is close to the lower joint 4, wherein two sealing ring grooves are disposed on the smooth section, and a sealing ring 3 is disposed in each sealing ring groove.
Preferably, as shown in fig. 1-3, pin through holes are uniformly distributed in the circumferential direction at one end of the lower joint 4 close to the upper joint 1, wherein anti-rotation pins 2 are arranged in the pin through holes, and the upper joint 1 and the lower joint 4 are fixedly connected by the anti-rotation pins 2.
Preferably, as shown in fig. 1 to 3, a trapezoidal internal thread of the lower joint 4 is sequentially provided with a first internal straight hole 7, a second internal straight hole 8, a first taper hole 9 and a third internal straight hole 10 along a direction away from the upper joint 1, wherein the diameters of the first internal straight hole 7, the second internal straight hole 8, the first taper hole 9 and the third internal straight hole 10 are sequentially reduced, wherein the diameter of the first taper hole 9 is gradually reduced along the direction away from the upper joint 1, wherein the first internal straight hole 7 of the lower joint 4 and the optical section of the upper joint 1 are sealed by the sealing ring 3, an annular groove 41 is provided between the end of the upper joint 1 and the second internal straight hole 8 of the lower joint 4, wherein one end of the dissolution component 5 is clamped at the annular groove 41, and one end of the lower joint 4 away from the upper joint 1 is provided with an external thread, wherein the external thread is adapted to a casing or an oil pipe connected thereto.
Preferably, as shown in fig. 1-2, the dissolution part 5 comprises a dissolution part shearing ring 51 and a dissolution part body 52 which are integrally formed, wherein the size of the dissolution part shearing ring 51 is matched with that of the annular groove 41, and the dissolution part shearing ring 51 is clamped at the annular groove 41.
Preferably, as shown in fig. 1-2, the through holes in the dissolution part 5 include a first chamfered through hole 11, a fourth straight through hole 12, and a second chamfered through hole 13 that sequentially penetrate through the first chamfered through hole 11, wherein the first chamfered through hole 11 gradually decreases in aperture in a direction away from the upper joint 1, wherein the second chamfered through hole 13 gradually increases in aperture in a direction away from the upper joint 1, the outer circumference of the dissolution part body 52 includes a cylindrical section and a tapered section, wherein the size of the cylindrical section is smaller than that of the dissolution part shear ring 51, and wherein the size of the tapered section gradually decreases in a direction away from the upper joint 1.
Example 6
As shown in figures 1-3, the utility model discloses a controllable dissolving mechanism of downhole tool, comprising an upper joint 1, a lower joint 4 and a dissolving component 5, wherein one end of the upper joint 1 is connected with one end of the lower joint 4, the other ends of the upper joint 1 and the lower joint 4 are respectively connected with a sleeve or an oil pipe, the dissolving component 5 is sleeved at one end of the lower joint 4 close to the upper joint 1, one end of the dissolving component 5 close to the upper joint 1 is clamped at the joint of the upper joint 1 and the lower joint 4, the upper joint 1, the lower joint 4 and the dissolving component 5 are all in a cylindrical annular structure and are coaxial, the aperture of an inner through hole of the lower joint 4 close to one end of the upper joint 1 is larger than the outer diameter of the dissolving component 5 close to one end of the upper joint 1, when the dissolving component 5 needs to be dissolved, the joint part of the upper joint 1 and the lower joint 4 can be cut off under the pressurizing condition by throwing a working ball 6 in, the remaining part of the dissolution part 5 can then move with the working ball 6 to the side remote from the upper joint 1.
Preferably, as shown in fig. 1 to 3, an internal thread is provided at one end of the upper joint 1 away from the lower joint 4, wherein the internal thread is adapted to a casing or an oil pipe connected to the internal thread, the inner through hole of the upper joint 1 has the same diameter as that of the casing or the oil pipe connected to the upper joint, a trapezoidal external thread is provided at one end of the upper joint 1 close to the lower joint 4, and the trapezoidal external thread is adapted to the trapezoidal internal thread at one end of the lower joint 4 close to the upper joint 1.
Preferably, as shown in fig. 1 to 3, a smooth section is further disposed at one end of the trapezoidal external thread of the upper joint 1, which is close to the lower joint 4, wherein two sealing ring grooves are disposed on the smooth section, and a sealing ring 3 is disposed in each sealing ring groove.
Preferably, as shown in fig. 1-3, pin through holes are uniformly distributed in the circumferential direction at one end of the lower joint 4 close to the upper joint 1, wherein anti-rotation pins 2 are arranged in the pin through holes, and the upper joint 1 and the lower joint 4 are fixedly connected by the anti-rotation pins 2.
Preferably, as shown in fig. 1 to 3, a trapezoidal internal thread of the lower joint 4 is sequentially provided with a first internal straight hole 7, a second internal straight hole 8, a first taper hole 9 and a third internal straight hole 10 along a direction away from the upper joint 1, wherein the diameters of the first internal straight hole 7, the second internal straight hole 8, the first taper hole 9 and the third internal straight hole 10 are sequentially reduced, wherein the diameter of the first taper hole 9 is gradually reduced along the direction away from the upper joint 1, wherein the first internal straight hole 7 of the lower joint 4 and the optical section of the upper joint 1 are sealed by the sealing ring 3, an annular groove 41 is provided between the end of the upper joint 1 and the second internal straight hole 8 of the lower joint 4, wherein one end of the dissolution component 5 is clamped at the annular groove 41, and one end of the lower joint 4 away from the upper joint 1 is provided with an external thread, wherein the external thread is adapted to a casing or an oil pipe connected thereto.
Preferably, as shown in fig. 1-2, the dissolution part 5 comprises a dissolution part shearing ring 51 and a dissolution part body 52 which are integrally formed, wherein the size of the dissolution part shearing ring 51 is matched with that of the annular groove 41, and the dissolution part shearing ring 51 is clamped at the annular groove 41.
Preferably, as shown in fig. 1-2, the through holes in the dissolution part 5 include a first chamfered through hole 11, a fourth straight through hole 12, and a second chamfered through hole 13 that sequentially penetrate through the first chamfered through hole 11, wherein the first chamfered through hole 11 gradually decreases in aperture in a direction away from the upper joint 1, wherein the second chamfered through hole 13 gradually increases in aperture in a direction away from the upper joint 1, the outer circumference of the dissolution part body 52 includes a cylindrical section and a tapered section, wherein the size of the cylindrical section is smaller than that of the dissolution part shear ring 51, and wherein the size of the tapered section gradually decreases in a direction away from the upper joint 1.
Preferably, as shown in fig. 1-2, the inner through hole diameter of the dissolving part 5 is smaller than that of the upper joint 1, wherein the taper of the conical section of the dissolving part 5 is the same as that of the first conical hole 9 of the lower joint 4, the dissolving part 5 is made of a soluble material, wherein the inner surface and the outer surface of the dissolving part 5 are both wrapped by a dissolution resistant coating, and the size of the shearing ring 51 of the dissolving part is proportional to the designed shearing force.
Preferably, as shown in fig. 1-2, the aperture of the second inner straight hole 8 of the lower joint 4 is larger than the size of the cylindrical section of the dissolution part 5, when the dissolution part 5 needs to be dissolved, the dissolution part shearing ring 51 and the dissolution part body 52 can be completely sheared under the pressurization condition by throwing the working ball 6 in the casing or the oil pipe, and the dissolution part body 52 moves to the side far away from the upper joint 1, and the diameter of the working ball 6 is smaller than the aperture of the first chamfered through hole 11 and larger than the aperture of the fourth inner straight hole 12.
Example 7
As shown in figures 1-3, the utility model discloses a controllable dissolving mechanism of downhole tool, comprising an upper joint 1, a lower joint 4 and a dissolving component 5, wherein one end of the upper joint 1 is connected with one end of the lower joint 4, the other ends of the upper joint 1 and the lower joint 4 are respectively connected with a sleeve or an oil pipe, the dissolving component 5 is sleeved at one end of the lower joint 4 close to the upper joint 1, one end of the dissolving component 5 close to the upper joint 1 is clamped at the joint of the upper joint 1 and the lower joint 4, the upper joint 1, the lower joint 4 and the dissolving component 5 are all in a cylindrical annular structure and are coaxial, the aperture of an inner through hole of the lower joint 4 close to one end of the upper joint 1 is larger than the outer diameter of the dissolving component 5 close to one end of the upper joint 1, when the dissolving component 5 needs to be dissolved, the joint part of the upper joint 1 and the lower joint 4 can be cut off under the pressurizing condition by throwing a working ball 6 in, the remaining part of the dissolution part 5 can then move with the working ball 6 to the side remote from the upper joint 1.
Preferably, as shown in fig. 1 to 3, an internal thread is provided at one end of the upper joint 1 away from the lower joint 4, wherein the internal thread is adapted to a casing or an oil pipe connected to the internal thread, the inner through hole of the upper joint 1 has the same diameter as that of the casing or the oil pipe connected to the upper joint, a trapezoidal external thread is provided at one end of the upper joint 1 close to the lower joint 4, and the trapezoidal external thread is adapted to the trapezoidal internal thread at one end of the lower joint 4 close to the upper joint 1.
Preferably, as shown in fig. 1 to 3, a smooth section is further disposed at one end of the trapezoidal external thread of the upper joint 1, which is close to the lower joint 4, wherein two sealing ring grooves are disposed on the smooth section, and a sealing ring 3 is disposed in each sealing ring groove.
Preferably, as shown in fig. 1-3, pin through holes are uniformly distributed in the circumferential direction at one end of the lower joint 4 close to the upper joint 1, wherein anti-rotation pins 2 are arranged in the pin through holes, and the upper joint 1 and the lower joint 4 are fixedly connected by the anti-rotation pins 2.
Preferably, as shown in fig. 1 to 3, a trapezoidal internal thread of the lower joint 4 is sequentially provided with a first internal straight hole 7, a second internal straight hole 8, a first taper hole 9 and a third internal straight hole 10 along a direction away from the upper joint 1, wherein the diameters of the first internal straight hole 7, the second internal straight hole 8, the first taper hole 9 and the third internal straight hole 10 are sequentially reduced, wherein the diameter of the first taper hole 9 is gradually reduced along the direction away from the upper joint 1, wherein the first internal straight hole 7 of the lower joint 4 and the optical section of the upper joint 1 are sealed by the sealing ring 3, an annular groove 41 is provided between the end of the upper joint 1 and the second internal straight hole 8 of the lower joint 4, wherein one end of the dissolution component 5 is clamped at the annular groove 41, and one end of the lower joint 4 away from the upper joint 1 is provided with an external thread, wherein the external thread is adapted to a casing or an oil pipe connected thereto.
Preferably, as shown in fig. 1-2, the dissolution part 5 comprises a dissolution part shearing ring 51 and a dissolution part body 52 which are integrally formed, wherein the size of the dissolution part shearing ring 51 is matched with that of the annular groove 41, and the dissolution part shearing ring 51 is clamped at the annular groove 41.
Preferably, as shown in fig. 1-2, the through holes in the dissolution part 5 include a first chamfered through hole 11, a fourth straight through hole 12, and a second chamfered through hole 13 that sequentially penetrate through the first chamfered through hole 11, wherein the first chamfered through hole 11 gradually decreases in aperture in a direction away from the upper joint 1, wherein the second chamfered through hole 13 gradually increases in aperture in a direction away from the upper joint 1, the outer circumference of the dissolution part body 52 includes a cylindrical section and a tapered section, wherein the size of the cylindrical section is smaller than that of the dissolution part shear ring 51, and wherein the size of the tapered section gradually decreases in a direction away from the upper joint 1.
Preferably, as shown in fig. 1-2, the inner through hole diameter of the dissolving part 5 is smaller than that of the upper joint 1, wherein the taper of the conical section of the dissolving part 5 is the same as that of the first conical hole 9 of the lower joint 4, the dissolving part 5 is made of a soluble material, wherein the inner surface and the outer surface of the dissolving part 5 are both wrapped by a dissolution resistant coating, and the size of the shearing ring 51 of the dissolving part is proportional to the designed shearing force.
Preferably, as shown in fig. 1-2, the aperture of the second inner straight hole 8 of the lower joint 4 is larger than the size of the cylindrical section of the dissolution part 5, when the dissolution part 5 needs to be dissolved, the dissolution part shearing ring 51 and the dissolution part body 52 can be completely sheared under the pressurization condition by throwing the working ball 6 in the casing or the oil pipe, and the dissolution part body 52 moves to the side far away from the upper joint 1, and the diameter of the working ball 6 is smaller than the aperture of the first chamfered through hole 11 and larger than the aperture of the fourth inner straight hole 12.
Preferably, as shown in fig. 1 to 3, preferably, a method for using the controllable dissolving mechanism of the downhole tool as described in any one of the above includes the following steps:
step 1) connecting a construction casing or an oil pipe with a plurality of underground tool controllable dissolving mechanisms to enter a well, and carrying out normal production;
step 2) when the dissolving part 5 is required to be dissolved, putting a working ball 6 from an inlet of a construction casing or an oil pipe, enabling the working ball 6 to fall to a first inclined chamfer through hole 11 of the dissolving part 5 through self weight, enabling the working ball 6 and the dissolving part 5 to form sealing, enabling the dissolving part 5 to be cut into two parts through pressure rise of a shaft, and enabling the integrity of the dissolving part 5 to be damaged;
and 3) the soluble material in the dissolving part 5 contacts with the dissolving solution to start dissolving, and after the soluble material is completely dissolved, the construction casing or the oil pipe recovers the full path, so that good working conditions are created for later operation.
Preferably, an annular groove 41 is formed between the upper joint 1 and the lower joint 4 after the upper joint and the lower joint are connected in place.
Preferably, the height of the dissolution part shear ring 51 is related to the shear force of the soluble material of the dissolution part 5 and the design of the dissolution part 5, and the higher the shear force design of the same soluble material dissolution part 5, the higher the height of the dissolution part shear ring 51.
The anti-rotation pin, the sealing ring and the working ball of the utility model are all the prior art; the soluble material and the dissolution-inhibiting coating are both commercially available products, and the processes of preparing the soluble material into a dissolving part and wrapping the dissolution-inhibiting coating on the inner surface and the outer surface of the dissolving part are all the prior art.
The utility model discloses a theory of operation and working process as follows:
as shown in fig. 1-3, the utility model relates to a controllable dissolving mechanism of downhole tool, which comprises an upper joint 1, an anti-rotation pin 2, a sealing ring 3, a lower joint and a dissolving part 4, wherein a construction sleeve or an oil pipe is connected with a plurality of controllable dissolving mechanisms of downhole tool to enter a well for normal production; when the dissolving component 5 needs to be dissolved, a working ball 6 or other blanking plugs are put into an inlet of a construction string (a sleeve or an oil pipe), the working ball 6 or other blanking plugs fall to a first inclined chamfer through hole 11 of the dissolving component 5 through self weight or liquid pumping, the working ball 6 and the dissolving component 5 form sealing, the pressure of a shaft is increased to enable a shearing ring 51 of the dissolving component and a body 52 of the dissolving component to be completely sheared into two parts, so that a complete dissolution resistant coating of the dissolving component 5 is damaged, a soluble material in the dissolving component 5 is contacted with the dissolving liquid to be dissolved, and after complete dissolution, the construction string recovers the full path, the problem that dissolution of downhole tools in an oil field is controlled is solved, and good working conditions are created for later-stage operation.
The utility model discloses controllable dissolving mechanism of downhole tool can be used to operations such as fracturing packer, bowling shutoff, has controllable dissolving, dissolves advantage such as back tubular column keeps full latus rectum.
The utility model discloses the back is cuted completely to the dissolution part shearing ring of soluble part and dissolution part body, and the dissolution part body is down and forms sealedly with the first taper hole of work ball or blanking plug and lower clutch, still can satisfy the requirement of pressure-bearing operating mode (if fracturing, pit shaft pressure testing, packer are suppressed and are set etc.) in a certain time.
The utility model discloses controllable mechanism that dissolves of downhole tool simple structure, convenient to use, practicality are strong, and controllability can be high, but wide application in the control of soluble downhole tool such as instruments such as soluble ball seat, sliding sleeve core dissolve the design.
Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, and that the scope of the invention is defined by the appended claims.
Claims (9)
1. A controllable mechanism that dissolves of downhole tool which characterized in that: the annular ring type oil dissolving device comprises an upper joint (1), a lower joint (4) and a dissolving part (5), wherein one end of the upper joint (1) is connected with one end of the lower joint (4), the other ends of the upper joint (1) and the lower joint (4) are respectively connected with a sleeve or an oil pipe, the dissolving part (5) is sleeved at one end, close to the upper joint (1), in the lower joint (4), one end, close to the upper joint (1), of the dissolving part (5) is clamped at the joint of the upper joint (1) and the lower joint (4), the upper joint (1), the lower joint (4) and the dissolving part (5) are all in a cylindrical annular structure and are coaxial, and the aperture of an inner through hole, close to one end of the upper joint (1), of the lower joint (4) is larger than the outer diameter, close to one end of the upper joint (.
2. A downhole tool controllable dissolution mechanism as claimed in claim 1, wherein: the one end that the lower clutch (4) was kept away from in top connection (1) is equipped with the internal thread, and wherein this internal thread is rather than the sleeve pipe or oil pipe looks adaptation of connecting, and wherein the interior through-hole aperture of top connection (1) is the same with the interior through-hole aperture of the sleeve pipe or oil pipe of connecting, the one end that top connection (1) is close to lower clutch (4) is equipped with trapezoidal external screw thread, and wherein this trapezoidal external screw thread is close to the trapezoidal internal thread looks adaptation connection of top connection (1) one end with lower clutch (4).
3. A downhole tool controllable dissolution mechanism as claimed in claim 2, wherein: and one end of the trapezoidal external thread of the upper joint (1) close to the lower joint (4) is also provided with a smooth section, wherein the smooth section is provided with two sealing ring grooves, and sealing rings (3) are arranged in the sealing ring grooves.
4. A downhole tool controllable dissolution mechanism as claimed in claim 3, wherein: one end of the lower joint (4) close to the upper joint (1) is uniformly provided with pin through holes along the circumferential direction, wherein the pin through holes are internally provided with anti-rotating pins (2), and the upper joint (1) and the lower joint (4) are fixedly connected by the anti-rotating pins (2).
5. A downhole tool controllable dissolution mechanism as claimed in claim 3, wherein: the trapezoidal internal thread of the lower joint (4) is sequentially provided with a first inner straight hole (7), a second inner straight hole (8), a first taper hole (9) and a third inner straight hole (10) along the direction far away from the upper joint (1), wherein the diameters of the first inner straight hole (7), the second inner straight hole (8), the first taper hole (9) and the third inner straight hole (10) are sequentially reduced, wherein the diameter of the first taper hole (9) is gradually reduced along the direction far away from the upper joint (1), the first inner straight hole (7) of the lower joint (4) and the optical section of the upper joint (1) are sealed through a sealing ring (3), an annular groove (41) is arranged between the end part of the upper joint (1) and the second inner straight hole (8) of the lower joint (4), one end of the dissolving part (5) is clamped at the annular groove (41), and an external thread is arranged at one end of the lower joint (4) far away from the upper joint (1), wherein the external thread is adapted to the casing or tubing to which it is connected.
6. A downhole tool controllable dissolution mechanism as claimed in claim 5, wherein: the dissolving part (5) comprises a dissolving part shearing ring (51) and a dissolving part body (52) which are integrally formed, wherein the size of the dissolving part shearing ring (51) is matched with that of the annular groove (41), and the dissolving part shearing ring (51) is clamped at the annular groove (41).
7. A downhole tool controllable dissolution mechanism as claimed in claim 6, wherein: the inner through hole of the dissolving part (5) comprises a first oblique chamfer through hole (11), a fourth inner straight hole (12) and a second oblique chamfer through hole (13) which are sequentially communicated, wherein the aperture of the first oblique chamfer through hole (11) is gradually reduced along with the direction far away from the upper joint (1), the aperture of the second oblique chamfer through hole (13) is gradually increased along with the direction far away from the upper joint (1), the outer circumference of the dissolving part body (52) comprises a cylindrical section and a conical section, the size of the cylindrical section is smaller than that of a shearing ring (51) of the dissolving part, and the size of the conical section is gradually reduced along with the direction far away from the upper joint (1).
8. A downhole tool controllable dissolution mechanism as claimed in claim 7, wherein: the inner through hole aperture of the dissolving part (5) is smaller than that of the upper connector (1), wherein the taper of the conical surface section of the dissolving part (5) is the same as that of the first conical hole (9) of the lower connector (4), the dissolving part (5) is made of a soluble material, the inner surface and the outer surface of the dissolving part (5) are wrapped by a dissolution resistant coating, and the size of a shearing ring (51) of the dissolving part is in direct proportion to the size of the designed shearing force.
9. A downhole tool controllable dissolution mechanism as claimed in claim 8, wherein: the aperture of a second inner straight hole (8) of the lower joint (4) is larger than the size of a cylindrical section of the dissolving part (5), when the dissolving part (5) needs to be dissolved, the dissolving part shearing ring (51) and the dissolving part body (52) can be completely sheared under the pressurization condition by throwing the working ball (6) into the casing or the oil pipe, the dissolving part body (52) moves to one side far away from the upper joint (1), and the diameter of the working ball (6) is smaller than that of the first inclined chamfer through hole (11) and larger than that of the fourth inner straight hole (12).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922035444.XU CN212054620U (en) | 2019-11-22 | 2019-11-22 | Controllable dissolving mechanism of downhole tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922035444.XU CN212054620U (en) | 2019-11-22 | 2019-11-22 | Controllable dissolving mechanism of downhole tool |
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| CN212054620U true CN212054620U (en) | 2020-12-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111075394A (en) * | 2019-11-22 | 2020-04-28 | 中国石油天然气股份有限公司 | Controllable dissolving mechanism of downhole tool and use method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111075394A (en) * | 2019-11-22 | 2020-04-28 | 中国石油天然气股份有限公司 | Controllable dissolving mechanism of downhole tool and use method thereof |
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