CN114135243A - Equal-well-diameter expansion pipe anti-failure composite expansion tool - Google Patents
Equal-well-diameter expansion pipe anti-failure composite expansion tool Download PDFInfo
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- CN114135243A CN114135243A CN202111443453.8A CN202111443453A CN114135243A CN 114135243 A CN114135243 A CN 114135243A CN 202111443453 A CN202111443453 A CN 202111443453A CN 114135243 A CN114135243 A CN 114135243A
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- 239000002131 composite material Substances 0.000 title claims abstract description 41
- 238000007789 sealing Methods 0.000 claims abstract description 93
- 239000010985 leather Substances 0.000 claims abstract description 15
- 238000004513 sizing Methods 0.000 claims abstract description 11
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 10
- 238000010008 shearing Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 3
- 238000005553 drilling Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/10—Reconditioning of well casings, e.g. straightening
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Joints Allowing Movement (AREA)
- Actuator (AREA)
Abstract
The invention relates to an anti-failure composite expansion tool for an expansion pipe with equal borehole diameter. The expansion joint comprises a conversion joint, a central pipe A, an expansion pipe, a sizing expansion core head, a near cone joint, a piston sleeve A, a double-female piston joint, a reducing cone upper fixing ring, a reducing cone variable-diameter expansion core head, a reinforcing leather cup, a reducing cone lower fixing ring, a single-female joint piston, a piston sleeve B, a U-shaped fixing sleeve, a tip cone valve sleeve, a bottom plug, a conical sealing ball seat, a sealing ball, a T-shaped ball press, a lower U-shaped press sleeve, a reciprocating spring (21), a central pipe B, a starting pin and the like. The method is characterized in that: the composite anti-failure expansion tool ensures that expansion can be smoothly completed when the traditional expansion mode is failed in sealing. The invention well solves the problem of construction failure caused by sealing failure of the expansion cone in the expansion pipe construction process, and saves a large amount of manpower, material resources and financial resources.
Description
Technical Field
The invention relates to an anti-failure composite expansion tool for an expansion pipe with equal borehole diameter, belongs to the technical field of petroleum and natural gas exploitation, and particularly relates to a composite expansion tool.
Background
The difficulty of drilling is increasing with the increasing production depth of the well. The expansion pipe technology is known as the moon climbing engineering in the oil and gas industry, the application is more and more extensive, and the constant-hole-diameter drilling is a new mileage for the development of the expansion pipe technology. The equal-well-diameter well drilling technology can solve the drilling problem of deep wells, ultra-deep wells and complex wells, can reduce the drilling risk and improve the well body structure under the conditions of not losing the well hole size and not influencing the subsequent well drilling operation, and can ensure the smooth drilling of a target layer. The expansion pipe can be successfully expanded underground, and the guarantee of equal-well-diameter drilling is provided. The traditional expansion mode is that expansion cone and expansion pipe realize sealed or leather cup and expansion pipe realize sealed, but the expansion pipe inner wall will become inhomogeneous after big plastic deformation inflation, and the ovality aggravation of internal diameter, the roughness of inner wall also sharply increases, and then leads to above-mentioned sealed inefficacy and lead to the expansion failure, forces to stop the inflation effect, need take the mode of boring away when serious, extravagant a large amount of time, causes serious economic waste.
Aiming at the problems, the composite expansion tool for preventing the failure of the expansion pipe with the same well diameter is provided, and the matched expansion tool is designed on the basis of keeping the original expansion sealing mode, so that the complete process of expansion construction of the expansion pipe can be ensured, the failure probability of the expansion pipe in the expansion construction process is reduced, and a large amount of time, labor, material resources and financial resources are saved.
Disclosure of Invention
The invention aims to: in order to ensure the complete implementation of expansion construction of the expansion pipe, the failure probability of the expansion pipe in the expansion construction process is reduced, and a large amount of time, manpower, material resources and financial resources are saved. The composite expansion tool for preventing the failure of the expansion pipe with the same borehole diameter is designed, the composite expansion of the expansion pipe can be realized, and the expansion construction can be continuously completed in a standby mode when the traditional mode fails.
In order to achieve the purpose, the technical scheme adopted by the invention for solving the problem is as follows: an anti-failure composite expansion tool for an expanded pipe with a constant well diameter is composed of a conversion joint (1), a central pipe A (2), an expansion pipe (3), a sizing expansion core head (4), a near cone joint (5), a piston sleeve A (6), a double-female piston joint (7), a reducing cone upper fixing ring (8), a variable-diameter expansion core head (9), a reinforcing leather cup (10), a reducing cone lower fixing ring (11), a single-female joint piston (12), a piston sleeve B (13), a U-shaped fixing sleeve (14), a tip cone valve sleeve (15), a bottom plug (16), a conical sealing ball seat (17), a sealing ball (18), a T-shaped ball press (19), a lower U-shaped press sleeve (20), a reciprocating spring (21), a central pipe B (22), a starting pin (23), an O-shaped sealing ring A (24), an O-shaped sealing ring B (25) and an O-shaped sealing ring C (26), an O-shaped sealing ring D (27), an O-shaped sealing ring E (28) and an O-shaped sealing ring F (29);
the utility model provides an equal hole diameter expansion pipe composite expansion instrument of preventing becoming invalid which characterized in that: the adapter (1) is connected with the central pipe A (2) through a thread and an O-shaped sealing ring A (24) and takes over the functions of transmitting tension and passing fluid.
The utility model provides an equal hole diameter expansion pipe composite expansion instrument of preventing becoming invalid which characterized in that: the central tube A (2) is connected with the double-female piston joint (7) through threads, and an O-shaped sealing ring D (27) is arranged between the central tube A and the double-female piston joint.
The utility model provides an equal hole diameter expansion pipe composite expansion instrument of preventing becoming invalid which characterized in that: the near cone joint (5) is connected with the piston sleeve A (6) through threads, and an O-shaped sealing ring C (26) is arranged between the near cone joint and the piston sleeve A; the central pipe B (22) is connected with the double-female piston joint (7) through threads.
The utility model provides an equal hole diameter expansion pipe composite expansion instrument of preventing becoming invalid which characterized in that: the upper fixed ring (8) of the reducing cone is connected with the piston sleeve A (6) through threads.
The utility model provides an equal hole diameter expansion pipe composite expansion instrument of preventing becoming invalid which characterized in that: the fixed ring (8) on the reducing cone is connected with a central tube B (22) through a starting pin (23).
The utility model provides an equal hole diameter expansion pipe composite expansion instrument of preventing becoming invalid which characterized in that: the reinforcing cup (10) is vulcanized on the reducing cone lower fixing ring (11).
The utility model provides an equal hole diameter expansion pipe composite expansion instrument of preventing becoming invalid which characterized in that: the reducing cone lower fixing ring (11) is sealed with a central tube B (22) through an O-shaped sealing ring B (25).
The utility model provides an equal hole diameter expansion pipe composite expansion instrument of preventing becoming invalid which characterized in that: the single female joint piston (12) is connected with the central pipe B (22) through threads; the U-shaped fixed sleeve (14) is connected with the single female joint piston (12) through threads.
The utility model provides an equal hole diameter expansion pipe composite expansion instrument of preventing becoming invalid which characterized in that: the tip cone valve sleeve (15) is connected with the piston sleeve B (13) through threads; the bottom plug (16) is connected with the expansion pipe (3) through threads.
The utility model provides an equal hole diameter expansion pipe composite expansion instrument of preventing becoming invalid which characterized in that: firstly, fixing an oil pipe connected with a crossover sub (1) on the ground, and pressurizing the oil pipe by a ground pressure pump; high-pressure liquid enters an annular pressure cavity A (30) through an inner hole of the oil pipe, an inner hole of the central pipe A (2), an inner hole of the central pipe B (22) and a small hole on the periphery; then, the hydraulic pump continues to pressurize, and at the moment, the reducing cone lower fixing ring (11) is pushed to fold the variable-diameter expansion core print (9) upwards under the action of pressure, so that the expansion pipe (3) is expanded at the position of the variable-diameter expansion core print (9); when the variable-diameter expansion core head (9) is completely closed, the sealing ball (18) is jacked up by the tip cone valve sleeve (15), and the pressure in the pipe column suddenly drops; and finally, releasing the oil pipe string connected with the adapter (1), continuously pressurizing by a ground pressure pump, allowing high-pressure liquid to enter the inner cavity of the expansion pipe (3) through the circumferential hole of the tip cone valve sleeve (15), sealing the reinforcing cup (10) and the expansion pipe (3), pushing the whole tool string to move upwards under the action of pressure and expanding the expansion pipe (3), and judging the expansion distance according to the upward moving distance of the oil pipe on the ground.
The utility model provides an equal hole diameter expansion pipe composite expansion instrument of preventing becoming invalid which characterized in that: when the sealing of the reinforced leather cup (10) fails, the ground oil pipe string does not move while the pressure of the pressure pump is reduced, and a tool standby scheme is started; firstly, lifting the tubing string upwards, cutting off a starting pin (23), and continuously lifting for a stroke distance, wherein the tip cone valve sleeve (15) is separated from the sealing ball (18), and the sealing ball (18) is sealed with the conical sealing ball seat (17) under the action of the reciprocating spring (21); then, fixing the oil pipe string connected with the adapter (1) on the ground again, pressurizing by a ground pressure pump, and allowing high-pressure liquid to enter an annular pressure cavity A (30) and an annular pressure cavity B (31); the near cone joint (5) and the reducing cone lower fixing ring (11) respectively push the sizing expansion core head (4) and the reducing cone lower fixing ring (9) upwards to expand, when the expansion distance reaches a stroke, the tip cone valve sleeve (15) pushes up the sealing ball (18), the pressure in the pipe column is reduced, the expansion stroke is finished, the oil pipe is lifted up again, and the operations are repeated.
The composite expansion tool for preventing failure of the equal-well-diameter expansion pipe is characterized in that: the variable-diameter expansion core head (9) consists of an upper variable-diameter sliding block and a lower variable-diameter sliding block, and the folding pressure is 20MPa to 30 MPa.
The composite expansion tool for preventing failure of the equal-well-diameter expansion pipe is characterized in that: 6-8 starting pins (23) are arranged around the ring, and the total shearing pressure is greater than 30 MPa.
The composite expansion tool for preventing failure of the equal-well-diameter expansion pipe is characterized in that: the starting pin (23) limits the relative movement of the variable diameter cone upper fixing ring (8) and the central pipe B (22) when the variable diameter expansion core print (9) is folded.
The composite expansion tool for preventing failure of the equal-well-diameter expansion pipe is characterized in that: after the oil pipe is lifted, the tip cone valve sleeve (15) is separated from the sealing ball (18), and the sealing ball (18) descends under the action of the reciprocating spring (21) to realize sealing again.
The composite expansion tool for preventing failure of the equal-well-diameter expansion pipe is characterized in that: when the sealing of the reinforced leather cup (10) fails, a standby scheme is used, when the reading of the ground pressure pump suddenly drops, the pressure pump is closed, the oil pipe is fixed after being lifted for one stroke of 400-450 mm, and then the pressure pump is started.
The composite expansion tool for preventing failure of the equal-well-diameter expansion pipe is characterized in that: the sizing expansion core head (4) can be provided with 1-2 groups of sealing rings sealed with the expansion pipe (8).
The composite expansion tool for preventing failure of the equal-well-diameter expansion pipe is characterized in that: 3-4 groups of sealing rings are arranged between the double-female piston joint (7) and the piston sleeve A (6) to form step sealing, and 100MPa pressure sealing can be realized.
Compared with the prior art, the technical scheme provided by the invention has the advantages that the invention provides the anti-failure composite expansion tool for the equal-well-diameter expansion pipe, the defect that the expansion cannot be continued after the leather cup fails can be overcome, and the expansion can be successfully ensured no matter whether the leather cup fails or not.
Drawings
FIG. 1 is a schematic view of the initial installation position of the present invention;
FIG. 2 is a schematic view of the present invention after the variable diameter expansion chase is fully closed;
FIG. 3 is a schematic view of the expansion of the reinforced cup of the present invention without failure;
FIG. 4 is a schematic view of the expansion of the reinforced cup of the present invention in the event of failure;
FIG. 5 is a schematic view of the present invention with the expandable variable diameter core print separated;
FIG. 6 is a schematic view of the present invention with the variable diameter expansion core closed;
FIG. 7 is a schematic view of the constant hole diameter process of the present invention;
1. the self-locking type hydraulic pump comprises a conversion joint, 2, a central pipe A, 3, an expansion pipe 3, 4, a sizing expansion core head, 5, a near cone joint, 6, a piston sleeve A, 7, a double-female piston joint, 8, a reducing cone upper fixing ring, 9, a variable-diameter expansion core head, 10, a reinforcing rubber cup, 11, a reducing cone lower fixing ring, 12, a single-female joint piston, 13, a piston sleeve B, 14, a U-shaped fixing sleeve, 15, a top cone valve sleeve, 16, a bottom plug, 17, a conical sealing ball seat, 18, a sealing ball, 19, a T-shaped ball press, 20, a lower U-shaped press sleeve, 21, a reciprocating spring, 22, a central pipe B, 23, a starting pin, 24, an O-shaped sealing ring A, 25, an O-shaped sealing ring B, 26, an O-shaped sealing ring C, 27, an O-shaped sealing ring D, 28, an O-shaped sealing ring E, 29, an O-shaped sealing ring F, 30, an annular pressure cavity A, 31 and annular pressure cavity B;
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
The specific embodiments of the present invention described herein are for the purpose of illustrating the invention and are not to be construed as limiting the invention in any way. In the light of the teaching of the present invention, the skilled person can conceive of any possible variant based on the invention, which shall be considered to fall within the scope of the invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are used broadly and can be, for example, mechanically or electrically connected, or can be connected to each other through two elements, directly or indirectly through an intermediate medium, and the specific meaning of the terms can be understood by those skilled in the art according to specific situations. The terms "vertical," "horizontal," "up," "down," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
According to the attached drawings, in order to achieve the purpose, the technical scheme adopted by the invention for solving the problem is as follows: an anti-failure composite expansion tool for an expansion pipe with an equal well diameter consists of a conversion joint 1, a central pipe A2, an expansion pipe 3, a sizing expansion core head 4, a near cone joint 5, a piston sleeve A6, a double-female piston joint 7, an upper reducing cone fixing ring 8, a variable-diameter expansion core head 9, a reinforcing leather cup 10, a lower reducing cone fixing ring 11, a single-female joint piston 12, a piston sleeve B13, a U-shaped fixing sleeve 14, a top cone valve sleeve 15, a bottom plug 16, a conical sealing ball seat 17, a sealing ball 18, a T-shaped ball press 19, a lower U-shaped press sleeve 20, a reciprocating spring 21, a central pipe B22, a starting pin 23, an O-shaped sealing ring A24, an O-shaped sealing ring B25, an O-shaped sealing ring C26, an O-shaped sealing ring D27, an O-shaped sealing ring E28 and an O-shaped sealing ring F29;
as shown in figure 1, the composite expansion tool for preventing the failure of the equal-well-diameter expansion pipe is characterized in that: the conversion joint 1 is connected with a central pipe A2 through threads and an O-shaped sealing ring A24, and plays a role in transmitting pulling force and passing fluid; the central pipe A2 is connected with the double-female piston joint 7 through threads, and an O-shaped sealing ring D27 is arranged between the central pipe A2 and the double-female piston joint 7; the near cone joint 5 is connected with a piston sleeve A6 through threads, and an O-shaped sealing ring C26 is arranged between the near cone joint and the piston sleeve A6; the central tube B22 is connected with the double-female piston joint 7 through threads; the fixed ring 8 on the reducing cone is connected with a piston sleeve A6 through threads; the fixed ring 8 on the reducing cone is connected with a central tube B22 through a starting pin 23; the reinforcing cup 10 is vulcanized on the reducing cone lower fixing ring 11; the reducing cone lower fixing ring 11 is sealed with a central tube B22 through an O-shaped sealing ring B25; the single female joint piston 12 is connected with a central pipe B22 through threads; the U-shaped fixing sleeve 14 is connected with the single female joint piston 12 through threads; the tip cone valve sleeve 15 is connected with the piston sleeve B13 through threads; the bottom plug 16 is connected with the expansion pipe 3 through threads;
as shown in fig. 1, firstly, fixing an oil pipe connected with a crossover sub 1 on the ground, and pressurizing the oil pipe by a ground pressure pump; high-pressure liquid enters an annular pressure cavity A30 through an inner hole of the oil pipe, an inner hole of a central pipe A2, an inner hole of a central pipe B22 and a small hole on the periphery; then, the hydraulic pump continues to pressurize, the reducing cone lower fixing ring 11 pushes and folds the variable-diameter expansion core head 9 upwards under the action of pressure, so that the expansion pipe 3 is expanded at the position of the variable-diameter expansion core head 9;
when the variable-diameter expansion core print 9 is completely folded, the tip cone valve sleeve 15 pushes up the sealing ball 18, and the pressure in the pipe column suddenly drops;
as shown in fig. 2-3, the tubing string connected with the adapter 1 is released, the ground pressure pump continues to pressurize, high-pressure liquid enters the inner cavity of the expansion tube 3 through the circumferential hole of the tip cone valve sleeve 15, the reinforcing cup 10 and the expansion tube 3 are sealed at the moment, the whole tool string is pushed to move upwards under the action of pressure, the expansion tube 3 is expanded, and the expansion distance can be determined according to the upward moving distance of the tubing string on the ground.
When the sealing of the reinforced leather cup 10 fails, the ground tubing string does not move while the pressure of the pressure pump is reduced, and a tool standby scheme is started;
as shown in fig. 4, firstly, the tubing string is lifted upwards, the starting pin 23 is sheared, and the tubing string is lifted further for a stroke distance, at the moment, the tip cone valve sleeve 15 is separated from the sealing ball 18, and the sealing ball 18 is sealed with the conical sealing ball seat 17 under the action of the reciprocating spring 21; then, fixing the oil pipe string connected with the adapter 1 on the ground again, pressurizing by a ground pressure pump, and allowing high-pressure liquid to enter an annular pressure cavity A30 and an annular pressure cavity B31; the near cone joint 5 and the reducing cone lower fixing ring 11 respectively push the sizing expansion core head 4 and the reducing cone lower fixing ring 9 upwards to expand, when the expansion distance reaches a stroke, the tip cone valve sleeve 15 pushes up the sealing ball 18, the pressure in the pipe column is reduced, the expansion stroke is ended, the oil pipe is lifted again, and the operation is repeated.
As shown in figure 5, the diameter-variable expansion core print 9 consists of four pieces of diameter-variable sliding blocks at the upper part and the lower part, and the folding pressure is 20MPa to 30 MPa.
As shown in fig. 6, the outer diameter of the variable diameter expansion core 9 increases to the design value after the closing.
6-8 starting pins are arranged around the 23 starting pins, and the total shearing pressure is greater than 30 MPa.
The starting pin 23 limits the relative movement of the fixed ring 8 on the reducing cone and the central tube B22 when the variable-diameter expansion core print 9 is folded.
When the oil pipe is lifted, the tip cone valve sleeve 15 is separated from the sealing ball 18, and the sealing ball 18 descends under the action of the reciprocating spring 21 to realize sealing again.
When the sealing of the reinforced leather cup 10 is failed, a standby scheme is used, when the reading of the ground pressure pump suddenly drops, the pressure pump is closed, the oil pipe is fixed after being lifted for one stroke of 400-450 mm, and then the pressure pump is started.
The sizing expansion core head 4 can be provided with 1-2 groups of sealing rings sealed with the expansion pipe 8.
3-4 groups of sealing rings are arranged between the double-female piston connector 7 and the piston sleeve A6 to form step sealing, and 100MPa pressure sealing can be realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the spirit and scope of the present invention.
Claims (8)
1. An anti-failure composite expansion tool for an expansion pipe with an equal well diameter comprises a conversion joint (1), a central pipe A (2), an expansion pipe (3), a sizing expansion core head (4), a near cone joint (5), a piston sleeve A (6), a double-female piston joint (7), a reducing cone upper fixing ring (8), a variable-diameter expansion core head (9), a reinforcing leather cup (10), a reducing cone lower fixing ring (11), a single-female joint piston (12), a piston sleeve B (13), a U-shaped fixing sleeve (14), a tip cone valve sleeve (15), a bottom plug (16), a conical sealing ball seat (17), a sealing ball (18), a T-shaped ball press (19), a lower U-shaped press sleeve (20), a reciprocating spring (21), a central pipe B (22), a starting pin (23), an O-shaped sealing ring A (24), an O-shaped sealing ring B (25), an O-shaped sealing ring C (26) and an O-shaped sealing ring D (27), an O-shaped sealing ring E (28) and an O-shaped sealing ring F (29);
the technical characteristics are as follows: the adapter (1) is connected with the central pipe A (2) through threads and an O-shaped sealing ring A (24); the central pipe A (2) is connected with a double-female piston joint (7) through threads, and an O-shaped sealing ring D (27) is arranged between the central pipe A and the double-female piston joint; the near cone joint (5) is connected with the piston sleeve A (6) through threads, and an O-shaped sealing ring C (26) is arranged between the near cone joint and the piston sleeve A; the central pipe B (22) is connected with the double-female piston joint (7) through threads; the upper fixed ring (8) of the reducing cone is connected with the piston sleeve A (6) through threads; the upper fixed ring (8) of the reducing cone is connected with a central tube B (22) through a starting pin (23); the reinforcing leather cup (10) is vulcanized on the reducing cone lower fixing ring (11); the reducing cone lower fixing ring (11) is sealed with a central tube B (22) through an O-shaped sealing ring B (25); the single female joint piston (12) is connected with the central pipe B (22) through threads; the U-shaped fixed sleeve (14) is connected with the single female joint piston (12) through threads; the tip cone valve sleeve (15) is connected with the piston sleeve B (13) through threads; the bottom plug (16) is connected with the expansion pipe (3) through threads;
the utility model provides an equal hole diameter expansion pipe composite expansion instrument of preventing becoming invalid which characterized in that: firstly, fixing an oil pipe connected with a conversion joint (1) on the ground, pressurizing the oil pipe through a ground pressure pump, enabling liquid to enter an environment-controlled pressure cavity A (30), pushing a reducing cone lower fixing ring (11) to fold a reducing expansion core head (9) upwards, and after the reducing expansion core head (9) is completely folded, jacking a sealing ball (18) by a jacking cone valve sleeve (15) and reducing the pressure in a pipe column; then, releasing an oil pipe connected with the adapter (1), continuously pressurizing by a ground pressure pump, enabling liquid pressure to enter an inner cavity of the expansion pipe (3) through a circumferential hole of the tip cone valve sleeve (15), sealing the reinforced leather cup (10) and the expansion pipe (3) at the moment, and when the expansion pressure is reached, enabling the oil pipe to move upwards and successfully start to expand;
the utility model provides an equal hole diameter expansion pipe composite expansion instrument of preventing becoming invalid which characterized in that: when the sealing of the reinforced leather cup (10) fails, a standby scheme is started, firstly, the oil pipe is lifted upwards, the starting pin (23) is cut off, the tip cone valve sleeve (15) is separated from the sealing ball (18), and the sealing ball (18) is sealed with the conical sealing ball seat (17) under the action of the reciprocating spring (21); then, an oil pipe connected with the adapter (1) on the fixed ground is pressurized through a ground pressure pump, and liquid enters an annular pressure cavity A (30) and liquid enters an annular pressure cavity B (31); the near cone joint (5) and the reducing cone lower fixing ring (11) respectively push the sizing expansion core head (4) and the reducing cone lower fixing ring (9) upwards to expand, when the sealing ball (18) is jacked up by the tip cone valve sleeve (15) and the pressure in the pipe column is reduced, an expansion stroke is finished, the oil pipe is lifted up again, and the pressing is continued.
2. The equal-hole-diameter expansion pipe failure-prevention composite expansion tool as claimed in claim 1, wherein: the variable-diameter expansion core head (9) consists of an upper variable-diameter sliding block and a lower variable-diameter sliding block, and the folding pressure is 20MPa to 30 MPa.
3. The equal-hole-diameter expansion pipe failure-prevention composite expansion tool as claimed in claim 1, wherein: 6-8 starting pins (23) are arranged around the ring, and the total shearing pressure is greater than 30 MPa.
4. The equal-hole-diameter expansion pipe failure-prevention composite expansion tool as claimed in claim 1, wherein: and the starting pin (23) is used for fixing the axial movement of the fixed ring (8) on the reducing cone when the reducing expansion core print (9) is folded.
5. The equal-hole-diameter expansion pipe failure-prevention composite expansion tool as claimed in claim 1, wherein: after the oil pipe is lifted, the tip cone valve sleeve (15) is separated from the sealing ball (18), and the sealing ball (18) descends under the action of the reciprocating spring (21) to realize sealing again.
6. The equal-hole-diameter expansion pipe failure-prevention composite expansion tool as claimed in claim 1, wherein: when the sealing of the reinforced leather cup (10) fails and a standby scheme is used, when the reading of the ground pressure pump is sharply reduced, the pressure pump is closed, the oil pipe is fixed after being lifted by 400-450 mm, and then the pressure pump is started.
7. The equal-hole-diameter expansion pipe failure-prevention composite expansion tool as claimed in claim 1, wherein: the sizing expansion core head (4) can be provided with 1-2 groups of sealing rings sealed with the expansion pipe (8).
8. The equal-hole-diameter expansion pipe failure-prevention composite expansion tool as claimed in claim 1, wherein: 3-4 groups of sealing rings are arranged between the double-female piston connector (7) and the piston sleeve A (6) to form step sealing, and 100MPa pressure sealing can be realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111443453.8A CN114135243B (en) | 2021-11-30 | 2021-11-30 | Failure-preventing composite expansion tool for equal-well-diameter expansion pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111443453.8A CN114135243B (en) | 2021-11-30 | 2021-11-30 | Failure-preventing composite expansion tool for equal-well-diameter expansion pipe |
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| Publication Number | Publication Date |
|---|---|
| CN114135243A true CN114135243A (en) | 2022-03-04 |
| CN114135243B CN114135243B (en) | 2023-06-02 |
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