CN111691853A - High-pressure energy-storage time-delay opening type toe end sliding sleeve and using method thereof - Google Patents
High-pressure energy-storage time-delay opening type toe end sliding sleeve and using method thereof Download PDFInfo
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- CN111691853A CN111691853A CN202010650600.8A CN202010650600A CN111691853A CN 111691853 A CN111691853 A CN 111691853A CN 202010650600 A CN202010650600 A CN 202010650600A CN 111691853 A CN111691853 A CN 111691853A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004146 energy storage Methods 0.000 title claims abstract description 24
- 238000012360 testing method Methods 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 239000012530 fluid Substances 0.000 claims description 18
- 238000010008 shearing Methods 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 11
- 238000004891 communication Methods 0.000 abstract description 10
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
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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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention provides a high-pressure energy-storage time-delay opening type toe end sliding sleeve and a using method thereof, wherein the sliding sleeve at least comprises an upper joint, a check valve, an outer shell, a spring, an inner shell, a piston, a shear pin and a lower joint; the check valve is arranged on the lower side surface of the upper joint, and two ends of the shell are respectively connected with the upper joint and the lower joint; the inner shell is arranged in the outer shell, the piston is arranged between the outer shell and the inner shell and fixed with the outer shell through shear pins, and the spring is arranged between the lower end face of the upper joint and the upper end face of the piston. According to the invention, the cavity I realizes a high-pressure energy storage function while the casing strength pressure test operation before fracturing construction is realized; and opening a tool liquid flow channel after the pressure of the wellhead is relieved, realizing the communication between the shaft and the stratum and opening the toe end sliding sleeve. The high-pressure casing pipe pressure testing device can not be started accidentally in the pressure testing process, and the toe end sliding sleeve can be started after the pressure of a well mouth is relieved after the high-pressure casing pipe strength testing operation is finished, so that the process requirement of shaft strength pressure testing is met.
Description
Technical Field
The invention belongs to the field of oil and gas field development, and particularly relates to a high-pressure energy-storage delay-opening toe-end sliding sleeve and a using method thereof.
Background
The toe end sliding sleeve tool is a rapid and efficient downhole tool which is free of perforation and used for opening a stratum, a preset position is set into the toe end sliding sleeve along with a well completion casing pipe, well cementation operation is carried out, the toe end sliding sleeve is directly opened through pressure build-up of a shaft during fracturing construction, and first-stage fracturing construction operation is directly carried out through injection of a light casing pipe. The tool can quickly and efficiently realize the communication between the shaft and the stratum, and quickly and efficiently solve the problem of first-layer perforation and fracturing of a casing sliding sleeve stratified section fracturing and bridge shooting combined staged fracturing process, particularly the difficult problem of first-section perforation of an ultra-long horizontal well which exceeds the lower depth of an oil pipe. However, the toe sliding sleeve tool is opened by the build-up pressure in the casing, which conflicts with the operation of pressure testing for casing strength before fracturing construction of a new well.
Disclosure of Invention
The invention provides a high-pressure energy-storage time-delay opening type toe end sliding sleeve and a using method thereof, which meet the requirement of sleeve strength pressure test operation before fracturing construction and have the function of the toe end sliding sleeve capable of realizing effective communication between a shaft and a stratum.
The technical scheme adopted by the invention is as follows:
a high-pressure energy-storage delay-opening toe end sliding sleeve at least comprises an upper joint, a check valve, an outer shell, a spring, an inner shell, a piston, a shear pin and a lower joint; the check valve is arranged on the lower side surface of the upper joint, and two ends of the shell are respectively connected with the upper joint and the lower joint; the inner shell is arranged in the outer shell, the piston is arranged between the outer shell and the inner shell and fixed with the outer shell through shear pins, and the spring is arranged between the lower end face of the upper joint and the upper end face of the piston.
The shell is respectively connected and fixed with the upper joint and the lower joint through threads.
The cavity I is communicated with the check valve, a spring is arranged in the cavity I, and the initial pre-tightening force of the spring is smaller than the shearing force of the shear pin in the initial state; the inner surface of the outer shell, the outer surface of the inner shell, the lower end face of the piston and the upper surface of the lower connector form a cavity II, and the cavity II is communicated with the interface C.
The piston is characterized in that the inner shell is provided with an interface B and an interface C, the outer shell is provided with an interface D, the interface B and the interface D are symmetrically arranged at the piston, and the interface C is positioned at the lower part of the inner shell.
And the inner side of the lower part of the upper joint is provided with a connector A, and the connector A is communicated with the check valve.
And under the state that the interface B and the interface D are completely communicated, the lower end surface of the piston is in contact connection with the upper end surface of the lower joint.
The inner surface and the outer surface of the piston are respectively connected with the inner shell and the outer shell in a sliding and sealing mode.
The lower part of the upper joint is provided with an inner step, the upper end surface of the inner shell is connected with the inner step, and the lower end surface of the inner shell is connected with the upper end surface of the lower joint.
A method for using a high-pressure energy-storage delay-opening toe end sliding sleeve comprises the following specific steps:
the toe end sliding sleeve tool is put into a preset position along with the well completion casing pipe to implement well cementation operation; in the initial state of the tool, the spring has initial pretightening force which is smaller than the shearing force of the shear pin, the liquid pressure on the upper end surface and the lower end surface of the piston is always equal, and the toe end sliding sleeve tool cannot be opened in the well cementation process;
in the process of applying high pressure to a wellhead, high-pressure fluid in a shaft enters the chamber I from the interface A, and simultaneously, high-pressure fluid in the shaft enters the chamber II from the interface C; because the areas of the upper end surface and the lower end surface of the piston are equal, the upper liquid pressure and the lower liquid pressure are also equal, the pretightening force of the spring is smaller than the shearing force of the shear pin, the piston cannot generate relative displacement between the outer shell and the inner shell, namely the toe end sliding sleeve cannot be opened in the process of applying high pressure to a shaft hole to test the pressure at a well mouth; a check valve is arranged on the lower side face of the upper joint, the check valve allows fluid in the well bore to enter the chamber I from the port A, the fluid is not allowed to flow out of the chamber I through the port A, the fluid in the chamber II can flow out or in through the port C, and after the toe end sliding sleeve tool is opened, the well bore can be communicated with the stratum through the ports B and D.
The invention has the beneficial effects that:
the invention realizes the effective communication between the shaft and the stratum through the up-and-down movement of the piston between the inner shell and the outer shell. The invention provides a high-pressure energy-storage delay-opening toe end sliding sleeve, which meets the requirement of sleeve strength pressure test operation before fracturing construction and has the function of a toe end sliding sleeve capable of realizing effective communication between a shaft and a stratum.
The following will be further described with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of the present invention.
FIG. 2 is a schematic view of the opening of the channel according to the present invention.
In the figures, the reference numbers are: 1. an upper joint; 2. a check valve; 3. a housing; 4. a spring; 5. an inner shell; 6. a piston; 7. shearing the nails; 8. and a lower joint.
Detailed Description
Example 1:
the invention provides a high-pressure energy-storage time-delay opening type toe end sliding sleeve and a using method thereof as shown in figures 1 and 2, which meet the requirement of casing strength pressure test operation before fracturing construction and have the function of the toe end sliding sleeve capable of realizing effective communication between a shaft and a stratum.
A high-pressure energy-storage time-delay opening type toe end sliding sleeve at least comprises an upper connector 1, a check valve 2, an outer shell 3, a spring 4, an inner shell 5, a piston 6, a shear pin 7 and a lower connector 8; the check valve 2 is arranged on the lower side surface of the upper joint 1, and two ends of the shell 3 are respectively connected with the upper joint 1 and the lower joint 8; the inner shell 5 is arranged in the outer shell 3, the piston 6 is arranged between the outer shell 3 and the inner shell 5 and fixed with the outer shell 3 through a shear pin 7, and the spring 4 is arranged between the lower end face of the upper joint 1 and the upper end face of the piston 6.
The invention realizes the effective communication between the shaft and the stratum through the up-and-down movement of the piston 6 between the inner shell and the outer shell. The invention provides a high-pressure energy-storage delay-opening toe end sliding sleeve, which meets the requirement of sleeve strength pressure test operation before fracturing construction and has the function of a toe end sliding sleeve capable of realizing effective communication between a shaft and a stratum.
Example 2:
based on embodiment 1, in this embodiment, preferably, the housing 3 is connected and fixed with the upper joint 1 and the lower joint 8 by threads.
Preferably, a chamber I is formed by the lower surface of the upper joint 1, the inner surface of the outer shell 3, the outer surface of the inner shell 5 and the upper end surface of the piston 6, the chamber I is communicated with the check valve 2, a spring 4 is arranged in the chamber I, and in an initial state, the spring 4 initially pre-tightening force is smaller than the shearing force of the shear pin 7; the inner surface of the outer shell 3, the outer surface of the inner shell 5, the lower end surface of the piston 6 and the upper surface of the lower joint 8 form a cavity II, and the cavity II is communicated with the interface C.
Preferably, the inner shell 5 is provided with a port B and a port C, the outer shell 3 is provided with a port D, the port B and the port D are symmetrically arranged at the piston 6, and the port C is positioned at the lower part of the inner shell 5.
Preferably, the inner side of the lower part of the upper joint 1 is provided with a port A, and the port A is communicated with the check valve 2.
Preferably, the lower end surface of the piston 6 is in contact connection with the upper end surface of the lower joint 8 in the state that the port B and the port D are completely communicated.
The check valve 2 allows fluid in the well bore to enter the chamber I from the port A, and does not allow fluid to flow out of the chamber I through the port A, fluid in the chamber II can flow out or in through the port C, and after the toe sliding sleeve tool is opened, the well bore can be communicated with the stratum through the ports B and D.
Preferably, the inner and outer surfaces of the piston 6 are slidably and sealingly connected to the inner and outer housings 5 and 3, respectively.
Preferably, the lower part of the upper joint 1 is provided with an inner step, the upper end surface of the inner shell 5 is connected with the inner step, and the lower end surface of the inner shell 5 is connected with the upper end surface of the lower joint 8.
A method for using a high-pressure energy-storage delay-opening toe end sliding sleeve is used for first-stage fracturing construction operation of a casing sliding sleeve stratified-stage fracturing and bridge-launching combined staged fracturing process, and can meet the requirement of casing strength pressure test operation before fracturing construction.
Drilling and cementing: the toe end sliding sleeve tool is put into a preset position along with the well completion casing pipe to implement well cementation operation. Under the instrument initial condition, spring 4 has initial pretightning force, and this pretightning force is less than shear force of shear pin 7, and the hydraulic pressure that piston 6 upper and lower terminal surface received equals all the time, and this toe end sliding sleeve instrument can not open among the well cementation process.
And (3) casing strength high-pressure test action: as shown in fig. 1, during the process of applying high pressure at the wellhead, high-pressure fluid in the well bore enters the chamber I from the interface a, and simultaneously, high-pressure fluid in the well bore enters the chamber II from the interface C. Because the areas of the upper end surface and the lower end surface of the piston 6 are equal, the upper liquid pressure and the lower liquid pressure are also equal, the pretightening force of the spring 4 is smaller than the shearing force of the shear pin 7, the piston 6 cannot generate relative displacement between the outer shell 3 and the inner shell 5, namely, the toe end sliding sleeve cannot be opened in the process of applying high pressure to the pressure test of the shaft at the well mouth. A check valve 2 is arranged on the lower side surface of the upper joint 1, the check valve 2 allows fluid in the well bore to enter the chamber I from the port A, the fluid is not allowed to flow out of the chamber I through the port A, the fluid in the chamber II can flow out or in through the port C, and after the toe end sliding sleeve tool is opened, the well bore can be communicated with the stratum through the ports B and D.
A high pressure energy storage time delay open type toe end sliding sleeve tool channel opening action: as shown in figure 1, after the casing strength high-pressure test action is finished and the wellhead is discharged with high pressure, under the action of the check valve 2, the high pressure entering the chamber I in the previous stage cannot be discharged, namely, the chamber I is enclosed with high-pressure fluid in the previous stage, the high pressure in the chamber II is discharged along with the wellhead pressure through the connector C, namely, the chamber II is also low pressure after the wellhead is discharged with pressure, the piston 6 is subjected to downward liquid acting force under the action of different liquid pressures on the upper end surface and the lower end surface, at the moment, the downward liquid acting force plus the pre-tightening force of the spring 4 is larger than the shearing force of the shear pin 7, the shear pin 7 is sheared, the piston 6 moves towards one side of the lower connector 8, and under the action of the spring pre-tightening force thrust, the piston 6 moves downwards to the position where the lower end surface is contacted with the upper end surface of the lower connector 8, as shown in figure 2, at the moment, the interface D realizes the communication between the shaft and the stratum.
According to the invention, high pressure is applied through a wellhead, while the casing strength pressure test operation before fracturing construction is realized, the cavity I realizes a high-pressure energy storage function, after the pressure of the wellhead is relieved, a tool liquid flow channel is opened by means of the self energy of a mechanism, namely, the connector B and the connector D are communicated, the communication between a shaft and a stratum is realized, and a toe end sliding sleeve is opened. This toe end sliding sleeve can not open by accident at the in-process that carries out the whole high-pressure testing of sleeve pipe intensity, finishes at sleeve pipe intensity high-pressure testing operation, treats that this toe end sliding sleeve just can open after the well head pressure release to satisfy the technology demand of pit shaft intensity pressure testing.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the present invention, and all designs identical or similar to the present invention are within the scope of the present invention. The device structure and method steps not described in detail in this embodiment are well known in the art and commonly used in the art, and will not be described here.
Claims (9)
1. The utility model provides a high pressure energy storage time delay open-type toe end sliding sleeve which characterized in that: the device at least comprises an upper joint (1), a check valve (2), an outer shell (3), a spring (4), an inner shell (5), a piston (6), a shear pin (7) and a lower joint (8); the check valve (2) is arranged on the lower side surface of the upper joint (1), and two ends of the shell (3) are respectively connected with the upper joint (1) and the lower joint (8); the inner shell (5) is arranged in the outer shell (3), the piston (6) is arranged between the outer shell (3) and the inner shell (5) and fixed with the outer shell (3) through a shear pin (7), and the spring (4) is arranged between the lower end face of the upper joint (1) and the upper end face of the piston (6).
2. The high-pressure energy-storage time-delay opening type toe end sliding sleeve as claimed in claim 1, wherein: the shell (3) is respectively connected and fixed with the upper joint (1) and the lower joint (8) through threads.
3. The high-pressure energy-storage time-delay opening type toe end sliding sleeve as claimed in claim 1, wherein: the cavity I is formed by the lower surface of the upper joint (1), the inner surface of the outer shell (3), the outer surface of the inner shell (5) and the upper end surface of the piston (6), the cavity I is communicated with the check valve (2), a spring (4) is arranged in the cavity I, and in an initial state, the spring (4) has initial pretightening force which is smaller than the shearing force of the shear pin (7); and a cavity II is formed by the inner surface of the outer shell (3), the outer surface of the inner shell (5), the lower end surface of the piston (6) and the upper surface of the lower joint (8), and is communicated with the interface C.
4. The high-pressure energy-storage time-delay opening type toe end sliding sleeve as claimed in claim 1, wherein: the piston type air conditioner is characterized in that an interface B and an interface C are arranged on the inner shell (5), an interface D is arranged on the outer shell (3), the interface B and the interface D are symmetrically arranged at the position of the piston (6), and the interface C is located on the lower portion of the inner shell (5).
5. The high-pressure energy-storage time-delay opening type toe end sliding sleeve as claimed in claim 1, wherein: and the inner side of the lower part of the upper joint (1) is provided with a connector A, and the connector A is communicated with the check valve (2).
6. The high-pressure energy-storage time-delay opening type toe end sliding sleeve as claimed in claim 4, wherein: and under the state that the interface B and the interface D are completely communicated, the lower end surface of the piston (6) is in contact connection with the upper end surface of the lower joint (8).
7. The high-pressure energy-storage time-delay opening type toe end sliding sleeve as claimed in claim 1, wherein: the inner surface and the outer surface of the piston (6) are respectively connected with the inner shell (5) and the outer shell (3) in a sliding and sealing way.
8. The high-pressure energy-storage time-delay opening type toe end sliding sleeve as claimed in claim 1, wherein: the lower part of the upper joint (1) is provided with an inner step, the upper end surface of the inner shell (5) is connected with the inner step, and the lower end surface of the inner shell (5) is connected with the upper end surface of the lower joint (8).
9. A method for using a high-pressure energy-storage delay opening type toe end sliding sleeve is characterized in that: the method comprises the following specific steps:
the toe end sliding sleeve tool is put into a preset position along with the well completion casing pipe to implement well cementation operation; in the initial state of the tool, the spring (4) has initial pretightening force which is smaller than the shearing force of the shear pin (7), the liquid pressure on the upper end surface and the lower end surface of the piston (6) is always equal, and the toe end sliding sleeve tool cannot be opened in the well cementation process;
in the process of applying high pressure to a wellhead, high-pressure fluid in a shaft enters the chamber I from the interface A, and simultaneously, high-pressure fluid in the shaft enters the chamber II from the interface C; because the areas of the upper end surface and the lower end surface of the piston (6) are equal, the upper liquid pressure and the lower liquid pressure are also equal, the pretightening force of the spring (4) is smaller than the shearing force of the shear pin (7), the piston (6) cannot generate relative displacement between the outer shell (3) and the inner shell (5), namely the toe end sliding sleeve cannot be opened in the process of applying high pressure to a shaft pressure test at a well mouth; a check valve (2) is arranged on the lower side surface of the upper joint (1), the check valve (2) allows fluid in the well bore to enter the chamber I from the port A, fluid in the chamber II can flow out or in from the chamber I through the port A, and after the toe end sliding sleeve tool is opened, the well bore can be communicated with the stratum through the ports B and D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010650600.8A CN111691853B (en) | 2020-07-08 | 2020-07-08 | High-pressure energy storage time-delay opening type toe end sliding sleeve and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010650600.8A CN111691853B (en) | 2020-07-08 | 2020-07-08 | High-pressure energy storage time-delay opening type toe end sliding sleeve and use method thereof |
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| Publication Number | Publication Date |
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| CN111691853A true CN111691853A (en) | 2020-09-22 |
| CN111691853B CN111691853B (en) | 2024-01-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112049606A (en) * | 2020-09-30 | 2020-12-08 | 中国石油天然气集团有限公司 | Time-delay opening toe end sliding sleeve and opening method thereof |
| CN113738304A (en) * | 2021-09-17 | 2021-12-03 | 中国石油化工股份有限公司 | Toe end sliding sleeve with shaft pressure testing function |
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