CN113803027B - Oil well fracturing sliding sleeve used in combination with soluble fracturing ball - Google Patents
Oil well fracturing sliding sleeve used in combination with soluble fracturing ball Download PDFInfo
- Publication number
- CN113803027B CN113803027B CN202111054710.9A CN202111054710A CN113803027B CN 113803027 B CN113803027 B CN 113803027B CN 202111054710 A CN202111054710 A CN 202111054710A CN 113803027 B CN113803027 B CN 113803027B
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- Prior art keywords
- sliding sleeve
- tube
- fracturing
- groove
- circular ring
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- 239000003129 oil well Substances 0.000 title claims abstract description 18
- 210000000078 claw Anatomy 0.000 claims abstract description 19
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 7
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
- E21B34/142—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools unsupported or free-falling elements, e.g. balls, plugs, darts or pistons
-
- 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
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
-
- 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
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/06—Sleeve valves
Landscapes
- 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)
- Reciprocating Pumps (AREA)
Abstract
The invention discloses an oil well fracturing sliding sleeve for being matched with a soluble fracturing ball, which comprises an outer cylinder, an upper joint and a lower joint, wherein the upper joint and the lower joint are respectively arranged at two ends of the outer cylinder; the inner sliding sleeve comprises a circular ring and four arc-shaped rods arranged on the circular ring at intervals, the four arc-shaped rods are perpendicular to the circular ring, the middle parts of the four arc-shaped rods are rotationally connected with the circular ring, one end of each arc-shaped rod is provided with an upper claw, the other end of each arc-shaped rod is provided with a lower claw, the upper claws are matched with the first grooves, and the lower claws are matched with the second grooves. The method has the advantages of simple operation, short required time, high operation efficiency and reduced well control risk, and a large amount of time is saved by opening a plurality of fracturing sliding sleeves at one time or at one time.
Description
Technical Field
The invention relates to the field of oil-gas well operation tools, in particular to an oil well fracturing sliding sleeve used in combination with a soluble fracturing ball.
Background
After the oil well is produced to a certain stage, the productivity and the permeability are reduced, and in order to enhance the oil discharge capacity and improve the oil well yield, a fracturing process technology is invented. The hydraulic fracturing is to inject fluid into a well at high speed by a ground high-pressure truck-mounted group, and the oil layer rock is broken to generate cracks by virtue of high pressure pumped at the bottom of the well. In order to prevent the pump truck from working down, the pressure is reduced, the cracks are closed by themselves, sand with the density which is several times higher than that of the stratum is mixed into the injected liquid after the stratum is broken, the fluid enters the cracks together and stays in the cracks permanently, and the support cracks are in an open state, so that the oil flow environment is improved for a long time. The current hydraulic fracturing technology is mature, the yield increasing effect of the oil well is obvious, and the hydraulic fracturing technology is a first-choice common technology for people; the oil layer has very small oil flow channel, i.e. lower permeability, and has very obvious yield increasing effect.
The existing fracturing sliding sleeve adopts a multi-stage ball-throwing sliding sleeve (step-difference ball-throwing sliding sleeve), each stage of sliding sleeve corresponds to one underground oil and gas layer, the inner drift diameter of each stage of ball-throwing sliding sleeve is changed from bottom to top, the opening and fracturing of each layer of sliding sleeve are completed by throwing steel balls/composite balls with different diameters from a wellhead, a plurality of soluble balls with different sizes are needed, the operation is complex, the working procedure is complex, the needed time is long, the working efficiency is low, and the well control risk is large.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides the oil well fracturing sliding sleeve which is simple to operate and high in operation efficiency and is used for being matched with a soluble fracturing ball, so that the well control risk is reduced.
The aim of the invention is realized by the following technical scheme: the oil well fracturing sliding sleeve comprises an outer barrel, an upper connector and a lower connector, wherein the upper connector and the lower connector are respectively arranged at two ends of the outer barrel, an inner sliding sleeve is arranged in the outer barrel in a sliding manner, a first groove and a second groove are formed in the inner wall of the outer barrel, and the second groove is located below the first groove;
the inner sliding sleeve comprises a circular ring and four arc-shaped rods arranged on the circular ring at intervals, the four arc-shaped rods are perpendicular to the circular ring, the middle parts of the four arc-shaped rods are rotationally connected with the circular ring, one end of each arc-shaped rod is provided with an upper claw, the other end of each arc-shaped rod is provided with a lower claw, the upper claws are matched with the first grooves, and the lower claws are matched with the second grooves.
In the scheme, the outer cylinder is provided with a plurality of first through holes in a penetrating mode, and the first through holes are arranged on the outer cylinder in a surrounding mode.
In the above scheme, the switch tube is arranged in the cavity of the outer cylinder in a sliding manner, the switch tube is positioned above the inner sliding sleeve, a plurality of second through holes are formed in the switch tube in a surrounding mode, and the second through holes are matched with the first through holes.
In the above scheme, the switch tube is connected with the circular ring through the first connecting plate.
In the above scheme, the inner sliding sleeve is provided with a push tube below, the push tube is arranged inside the outer cylinder in a sliding manner, and the push tube is connected with the circular ring through a second connecting plate.
In the scheme, a piston tube is arranged below the push tube, and a wear-resistant ring is sleeved on the outer wall of the piston tube.
In the above scheme, still be provided with the third recess in the cavity of urceolus, the third recess is located the second recess below, be provided with the spring in the third recess, wear-resisting ring slides and sets up in the third recess, wear-resisting ring is located the spring top, wear-resisting ring with spring butt.
In the scheme, the inner diameters of the upper joint, the lower joint, the circular ring, the switch tube, the push tube and the piston tube are the same, and the inner diameter of the outer cylinder is the same as the outer diameters of the circular ring, the switch tube, the push tube and the piston tube.
The oil well fracturing sliding sleeve used for matching with the soluble fracturing ball has the following beneficial effects:
1. when the well is not deep, the fracturing sliding sleeves of all levels can be opened through the first soluble fracturing balls, or a plurality of fracturing sliding sleeves are opened at a time, and the second soluble fracturing balls are used for closing when the well is required to be closed, so that too many types of fracturing balls do not need to be prepared, the operation is simple, a plurality of fracturing sliding sleeves are opened at a time or once, a large amount of time is saved, the operation is simple, the working procedure is simple, the required time is short, the working efficiency is high, and the well control risk is reduced.
2. If the well is deeper, the two fracturing sliding sleeves can be opened and closed step by using two fracturing balls, so that the fracturing can be performed in a layered manner, and the fracturing effect is good.
Drawings
FIG. 1 is a schematic diagram of an oil well fracturing sleeve for use with a soluble fracturing ball according to the present invention;
in the figure, 1, an outer cylinder, 2, an upper joint, 3, a lower joint, 4, an inner sliding sleeve, 5, a first groove, 6, a second groove, 7, a circular ring, 8, an arc-shaped rod, 9, an upper claw, 10, a lower claw, 11, a first through hole, 12, a switch tube, 13, a second through hole, 14, a first connecting plate, 15, a push tube, 16, a second connecting plate, 17, a piston tube, 18, a wear-resisting ring, 19, a third groove, 20 and a spring.
Detailed Description
The following further details the technical solution of the present invention with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description, but the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, only for convenience of description and simplification of the description, and is not indicative or implying that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, or detachably connected, disposed, or integrally connected, disposed, for example; the model of the electric appliance provided by the invention is only used as a reference. It is possible for those skilled in the art to replace different types of electrical appliances having the same function according to actual use conditions, and it is possible for those skilled in the art to understand the specific meaning of the above terms in the present invention in a specific case.
Referring to fig. 1, the present invention provides a technical solution: as shown in fig. 1, the oil well fracturing sliding sleeve for being matched with a soluble fracturing ball comprises an outer barrel 1, an upper joint 2, a lower joint 3 and an inner sliding sleeve 4. The outer cylinder 1 one end is provided with top connection 2, and the other end is provided with the lower clutch 3, and the inner sliding of outer cylinder 1 is provided with interior slip cap 4, is provided with first recess 5 and second recess 6 on the inner wall of outer cylinder 1, and second recess 6 is located first recess 5 below.
The inner sliding sleeve 4 comprises a circular ring 7, four arc rods 8 are arranged on the circular ring 7 at intervals, the four arc rods 8 are perpendicular to the circular ring 7, the middle parts of the four arc rods 8 are rotationally connected with the circular ring 7, one end of each arc rod 8 is provided with an upper claw 9, the other end of each arc rod is provided with a lower claw 10, the upper claw 9 is matched with the first groove 5, the lower claw 10 is matched with the second groove 6, a plurality of first through holes 11 are formed in the outer cylinder 1 in a penetrating manner, the plurality of first through holes 11 are circumferentially arranged on the outer cylinder 1, the inner sliding sleeve further comprises a switching tube 12, the switching tube 12 is slidably arranged in a cavity of the outer cylinder 1, the switching tube 12 is positioned above the inner sliding sleeve 4, a plurality of second through holes 13 are circumferentially arranged on the switching tube 12, the plurality of second through holes 13 are matched with the first through holes 11, and the switching tube 12 is connected with the circular ring 7 through a first connecting plate 14; in the implementation, as shown in fig. 1, when the fracturing sliding sleeve is required to be opened, the first soluble fracturing ball is thrown into the first fracturing sliding sleeve, passes through the upper joint 2 and the switch tube 12 and falls onto the upper jaw 9 of the inner sliding sleeve 4, then the fracturing sliding sleeve is pressed, the first soluble fracturing ball pushes the four upper jaws 9 to move downwards, meanwhile, the inner sliding sleeve 4 and the switch tube 12 move downwards, the upper jaw 9 enters into the first groove 5 until the upper jaw 9 moves to the first groove 5, the first soluble fracturing ball can pass through the whole fracturing sliding sleeve, at the moment, the lower jaw 10 moves to the second groove 6, but the upper jaw is in the first groove 5, the rod body upper part of the whole arc rod 8 rotates to the upper jaw 7, and the upper jaw 10 can not enter into the first groove 13 and simultaneously pass through the first groove 6, and the upper jaw is in the second groove 13.
The inner sliding sleeve 4 below is provided with push tube 15, push tube 15 slides and sets up inside urceolus 1, push tube 15 passes through second connecting plate 16 and is connected with ring 7, push tube 15 below is provided with piston tube 17, the cover is equipped with wear ring 18 on the outer wall of piston tube 17, still be provided with third recess 19 in the cavity of urceolus 1, third recess 19 is located second recess 6 below, be provided with spring 20 in the third recess 19, wear ring 18 slides and sets up in third recess 19, wear ring 18 is located spring 20 top, wear ring 18 and spring 20 butt, the internal diameter of top connection 2, lower clutch 3, ring 7, switching tube 12, push tube 15 and piston tube 17 is the same, the internal diameter of urceolus 1 is the same with ring 7, the external diameter of switching tube 12, push tube 15 and piston tube 17.
In the implementation, as shown in fig. 1, the upper claw 9 pushes the push tube 15 through the second connecting plate 16 during the process of entering the first groove 5, and the push tube 15 pushes the piston tube 17 to move downwards. When the piston tube 17 moves downwards, the spring 20 is compressed through the wear-resistant ring 18, and when the first soluble fracturing ball passes through the inner sliding sleeve 4, the elastic force of the spring 20 acts on the inner sliding sleeve 4, so that the upper clamping jaw 9 is always positioned in the first groove 5 and is abutted with the first groove 5, and the first through hole 11 and the second through hole 13 are in a communicating and opening state. When the through hole is required to be closed after the fracturing is completed, a second soluble fracturing ball is put in, the diameter of the second soluble fracturing ball is slightly larger than that of the first soluble fracturing ball, and the diameter of the second soluble fracturing ball is almost equal to the inner diameter of the upper joint 2. The second soluble fracturing ball passes through the upper joint 2, the switch tube 12 and the circular ring 7, reaches the lower jaw 10, is almost sealed with the push tube 15 at the moment, and is pushed downwards by pressing the inside, so that the lower jaw 10 is pushed into the second groove 6, the upper jaw 9 at the other end of the arc-shaped rod 8 is pried out of the first groove 5 based on the lever principle, the inner sliding sleeve 4 is pushed back to the original position under the action of the spring 20, and the switch tube 12 is further moved upwards, so that the first through hole 11 and the second through hole 13 are staggered, and the through hole at the position is closed. According to the same method, the sliding sleeves at the next fracturing level are opened, if the well is deeper, the fracturing sliding sleeves can be opened step by step in the mode, but more soluble fracturing balls with two specifications are needed, when the well is not deeper, the fracturing sliding sleeves at all levels can be opened through the first soluble fracturing balls, or a plurality of fracturing sliding sleeves are opened at one time, and when the fracturing sliding sleeves are required to be closed, the second soluble fracturing balls are adopted to be closed, so that the fracturing sliding sleeves with too many specifications are not needed to be prepared, meanwhile, the operation is simple, the fracturing sliding sleeves are opened at one time or once, a large amount of time is saved, the operation is simple, the working procedure is simple, the required time is short, the operation efficiency is high, and the well control risk is reduced.
The foregoing is merely a preferred embodiment of the invention, and it is to be understood that the invention is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.
Claims (5)
1. The oil well fracturing sliding sleeve for being matched with a soluble fracturing ball comprises an outer barrel (1) and an upper joint (2) and a lower joint (3) which are respectively arranged at two ends of the outer barrel (1), and is characterized in that an inner sliding sleeve (4) is arranged in the inner sliding manner of the outer barrel (1), a first groove (5) and a second groove (6) are formed in the inner wall of the outer barrel (1), and the second groove (6) is located below the first groove (5);
the inner sliding sleeve (4) comprises a circular ring (7) and four arc rods (8) arranged on the circular ring (7) at intervals, the four arc rods (8) are perpendicular to the circular ring (7), the middle parts of the four arc rods (8) are rotationally connected with the circular ring (7), one end of each arc rod (8) is provided with an upper claw (9), the other end of each arc rod is provided with a lower claw (10), the upper claws (9) are matched with the first grooves (5), and the lower claws (10) are matched with the second grooves (6);
a plurality of first through holes (11) are formed in the outer cylinder (1) in a penetrating manner, and the first through holes (11) are arranged on the outer cylinder (1) in a surrounding manner; the oil well fracturing sliding sleeve further comprises a switch tube (12) which is arranged in the cavity of the outer barrel (1) in a sliding manner, the switch tube (12) is positioned above the inner sliding sleeve (4), a plurality of second through holes (13) are formed in the switch tube (12) in a surrounding manner, and the second through holes (13) are matched with the first through holes (11); the switching tube (12) is connected to the ring (7) via a first connection plate (14).
2. The oil well fracturing sliding sleeve for being matched with a soluble fracturing ball for use according to claim 1, wherein a push tube (15) is arranged below the inner sliding sleeve (4), the push tube (15) is arranged inside the outer cylinder (1) in a sliding mode, and the push tube (15) is connected with the circular ring (7) through a second connecting plate (16).
3. The oil well fracturing sliding sleeve for being matched with the soluble fracturing ball for use according to claim 2, wherein a piston tube (17) is arranged below the pushing tube (15), and a wear-resistant ring (18) is sleeved on the outer wall of the piston tube (17).
4. An oil well fracturing sliding sleeve for being matched with a soluble fracturing ball for use according to claim 3, characterized in that a third groove (19) is further arranged in the cavity of the outer barrel (1), the third groove (19) is located below the second groove (6), a spring (20) is arranged in the third groove (19), the wear-resistant ring (18) is slidably arranged in the third groove (19), the wear-resistant ring (18) is located at the top of the spring (20), and the wear-resistant ring (18) is abutted with the spring (20).
5. The oil well fracturing sliding sleeve for use with a soluble fracturing ball according to claim 4, wherein the inner diameters of the upper joint (2), the lower joint (3), the circular ring (7), the switching tube (12), the push tube (15) and the piston tube (17) are the same, and the inner diameter of the outer cylinder (1) is the same as the outer diameters of the circular ring (7), the switching tube (12), the push tube (15) and the piston tube (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111054710.9A CN113803027B (en) | 2021-09-09 | 2021-09-09 | Oil well fracturing sliding sleeve used in combination with soluble fracturing ball |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111054710.9A CN113803027B (en) | 2021-09-09 | 2021-09-09 | Oil well fracturing sliding sleeve used in combination with soluble fracturing ball |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113803027A CN113803027A (en) | 2021-12-17 |
| CN113803027B true CN113803027B (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111054710.9A Active CN113803027B (en) | 2021-09-09 | 2021-09-09 | Oil well fracturing sliding sleeve used in combination with soluble fracturing ball |
Country Status (1)
| Country | Link |
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| CN (1) | CN113803027B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN113803027A (en) | 2021-12-17 |
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