CN111005708A - Unconventional reservoir staged fracturing device - Google Patents
Unconventional reservoir staged fracturing device Download PDFInfo
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- CN111005708A CN111005708A CN202010016169.1A CN202010016169A CN111005708A CN 111005708 A CN111005708 A CN 111005708A CN 202010016169 A CN202010016169 A CN 202010016169A CN 111005708 A CN111005708 A CN 111005708A
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- 239000007788 liquid Substances 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 11
- 230000000694 effects Effects 0.000 abstract description 3
- 238000011282 treatment Methods 0.000 abstract description 3
- 230000035699 permeability Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004058 oil shale 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
- 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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- Valves And Accessory Devices For Braking Systems (AREA)
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Abstract
The invention discloses an unconventional reservoir staged fracturing device, which adopts a staged fracturing mode, has high fracturing reliability, can adjust the fracturing position of staged fracturing at any time, is convenient for fracturing different positions, and can perform selective fracturing treatment on different positions according to actual conditions at the same time, a staged fracturing control head mechanism of the invention is connected with a control pipe, the staged fracturing control head mechanism is controlled by the control pipe, the fracturing capacity and effect are effectively ensured, a feeding and feeding adjusting mechanism can also axially feed and feed the staged fracturing control head mechanism, so that the staged fracturing operation of the staged fracturing control head mechanism on different underground positions is realized, a front hydraulic expansion sleeve and a rear hydraulic expansion sleeve of the invention are sealed with a fracturing hole 18 after being expanded, and a fracturing cavity is formed between the front hydraulic expansion sleeve and the rear hydraulic expansion sleeve, realize the fracturing in this section region, fracturing is simple and convenient.
Description
Technical Field
The invention relates to reservoir fracturing equipment, in particular to an unconventional reservoir staged fracturing device.
Background
The unconventional oil gas storage capacity of China is considerable, but exploration and development of unconventional oil gas are still in the starting stage, and development and utilization of shale gas, oil shale and the like are greatly promoted in recent years. However, since unconventional oil and gas storage is typically located in low permeability reservoirs, fracturing treatments of low permeability reservoirs is one of the essential key processes. And because the fracturing hole is often darker, if concentrated fracturing is adopted, the required fracturing pressure is difficult to achieve, the uniformity of fracturing is poor, and the fracturing treatment is more difficult for the position with poor air permeability.
Accordingly, the present invention is directed to an unconventional staged fracturing device for a reservoir to solve the problems set forth in the background art.
Disclosure of Invention
The invention aims to provide a staged fracturing device for unconventional reservoirs, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the unconventional reservoir staged fracturing device comprises a fracturing fluid supply device, a staged control device, a fracturing pipe, a control pipe and a staged fracturing control head mechanism, and is characterized in that the output end of the fracturing fluid supply device is connected to the fracturing pipe through a fluid supply pipe, the center of the fracturing pipe is coaxially sleeved with the control pipe, the control pipe is in control connection with the staged control device, the staged fracturing control head mechanism is arranged at the front end of the fracturing pipe, and the staged fracturing control head mechanism is also connected with the control pipe so as to control the staged fracturing control head mechanism;
the staged fracturing control head mechanism is characterized by further comprising a feeding and feeding adjusting mechanism, wherein the feeding and feeding adjusting mechanism can axially feed and feed the staged fracturing control head mechanism so as to realize staged fracturing operation of the staged fracturing control head mechanism at different underground positions.
Preferably, a connecting radial hole which can be plugged and connected by a plug is formed in the outer end portion of the fracturing pipe, a radial connector is arranged in the connecting radial hole, the radial connector is connected with the liquid supply pipe, and a cavity between the fracturing pipe and the control pipe is a flow channel of the fracturing liquid.
Further, as preferred, the feeding and feeding adjusting mechanism comprises a feeding hydraulic cylinder, a frame, a connecting seat, a positioning disc and a guide disc, wherein the feeding hydraulic cylinder is fixed on the frame, the inner side of the frame is provided with the connecting seat fixed at the output end of the feeding hydraulic cylinder, the connecting seat is connected with the positioning disc, the end part of the frame is also fixedly connected with the guide disc, the positioning disc can position and push the fracturing pipe to be installed and fed and the control pipe to be fed, and the guide disc is provided with a guide hole for the fracturing pipe and the control pipe to pass through.
Further, as preferred, still be provided with the intermediate junction frame between frame and the deflector, the intermediate junction frame is door style of calligraphy structure.
Further, as preferred, the staged fracturing control head mechanism comprises a front hydraulic expansion sleeve, a rear hydraulic expansion sleeve and a fracturing mechanism, wherein the front hydraulic expansion sleeve is fixed at the front end of the fracturing mechanism, the rear hydraulic expansion sleeve is arranged at the rear end of the fracturing mechanism, the fracturing pipe is communicated with the fracturing mechanism and is positioned at the front ends of the fracturing pipe and the control pipe, and the front hydraulic expansion sleeve and the rear hydraulic expansion sleeve are both connected with the control pipe.
Further, as preferred, fracturing mechanism includes fixed pot head, middle fixed cover and gomphosis adapter sleeve, wherein, one side fixed connection of fixed pot head preceding hydraulic pressure inflation cover, the opposite side fixedly connected with of fixed pot head middle fixed cover, the fixed gomphosis of the fixed end of middle cover is connected the gomphosis adapter sleeve, the gomphosis adapter sleeve is fixed the tip of fracturing pipe, the fixed cover of back hydraulic pressure inflation cover is established on the pressure pipe, just lie in on the fracturing pipe still be provided with fracturing fluid liquid outlet hole between preceding hydraulic pressure inflation cover and the back hydraulic pressure inflation cover.
Preferably, an inner connection joint extending into the inner connection joint is arranged at the end of the control pipe, the inner end of the inner connection joint is communicated with the front hydraulic expansion sleeve so as to control expansion of the front hydraulic expansion sleeve, and the control pipe is communicated with the rear hydraulic expansion sleeve through a radial communicating pipe so as to control expansion of the rear hydraulic expansion sleeve.
Further, as preferred, the interconnection connects the card to be established fixed end cover and pass in proper order fixed cover in the middle and gomphosis adapter sleeve, still be provided with locking spring between fixed cover in the middle and the gomphosis adapter sleeve.
Further, as preferred, the front hydraulic expansion sleeve is provided with a liquid inlet joint in a communicating mode, and the liquid inlet joint is located in a central cavity of the inner connecting joint.
Further, preferably, the fracturing pipe and the control pipe are connected in a multi-section sequentially detachable mode.
Compared with the prior art, the invention has the beneficial effects that:
the staged fracturing control head mechanism is connected with the control pipe, the staged fracturing control head mechanism is controlled by the control pipe, the fracturing capacity and the fracturing effect are effectively ensured, the feeding and feeding adjusting mechanism can also axially feed and feed the staged fracturing control head mechanism, the staged fracturing operation of the staged fracturing control head mechanism on different underground positions is realized, the front hydraulic expansion sleeve and the rear hydraulic expansion sleeve are sealed with the wall of a fracturing hole after being expanded, so that a fracturing cavity is formed between the front hydraulic expansion sleeve and the rear hydraulic expansion sleeve to realize the fracturing of the zone of the stage, and the fracturing is simple and convenient.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an unconventional reservoir staged fracturing device;
FIG. 2 is a schematic structural diagram of a staged control device in an unconventional reservoir staged fracturing device;
Detailed Description
Referring to fig. 1-2, in the embodiment of the present invention, an unconventional reservoir staged fracturing device includes a fracturing fluid supply device 1, a staged control device 12, a fracturing pipe 11, a control pipe 9, and a staged fracturing control head mechanism 10, and is characterized in that an output end of the fracturing fluid supply device 1 is connected to the fracturing pipe 11 through a fluid supply pipe 2, and is characterized in that the control pipe 9 is coaxially sleeved at a center of the fracturing pipe, the control pipe 9 is in control connection with the staged control device 12, the staged fracturing control head mechanism 10 is disposed at a front end of the fracturing pipe, and the staged fracturing control head mechanism 10 is further connected to the control pipe 9 so as to control the staged fracturing control head mechanism 10;
the staged fracturing control head mechanism further comprises a feeding and feeding adjusting mechanism, and the feeding and feeding adjusting mechanism can axially feed and feed the staged fracturing control head mechanism 10 so as to realize staged fracturing operation of the staged fracturing control head mechanism 10 at different underground positions.
In this embodiment, a connection radial hole capable of being plugged and connected by a plug is disposed at an outer end of the fracturing pipe 11, a radial joint 8 is disposed in the connection radial hole, the radial joint is connected to the liquid supply pipe 2, and a cavity between the fracturing pipe 11 and the control pipe is configured as a flow passage of the fracturing liquid.
As a preferred embodiment, the feeding and feeding adjusting mechanism includes a feeding hydraulic cylinder 3, a frame 15, a connecting seat 4, a positioning plate 5 and a guiding plate 7, wherein the feeding hydraulic cylinder is fixed on the frame, the connecting seat fixed at the output end of the feeding hydraulic cylinder is arranged on the inner side of the frame, the positioning plate is connected to the connecting seat, the guiding plate is further fixedly connected to the end of the frame, the positioning plate can position and push the fracturing pipe 13 to be installed and fed and the control pipe 6 to be fed, and a guiding hole for the fracturing pipe and the control pipe to pass through is formed in the guiding plate.
An intermediate connecting frame 14 is further arranged between the rack and the guide disc, and the intermediate connecting frame is of a door-shaped structure.
The staged fracturing control head mechanism 10 comprises a front hydraulic expansion sleeve 17, a rear hydraulic expansion sleeve 16 and a fracturing mechanism, wherein the front hydraulic expansion sleeve is fixed at the front end of the fracturing mechanism, the rear hydraulic expansion sleeve 16 is arranged at the rear end of the fracturing mechanism, a fracturing pipe 11 is communicated with the fracturing mechanism and is located at the front ends of the fracturing pipe and a control pipe 9, and the front hydraulic expansion sleeve 17 and the rear hydraulic expansion sleeve 16 are connected with the control pipe 9.
Fracturing mechanism includes fixed pot head 21, middle fixed cover 22 and gomphosis adapter sleeve 25, wherein, one side fixed connection of fixed pot head preceding hydraulic pressure inflation cover 17, the opposite side fixedly connected with of fixed pot head middle fixed cover, the fixed gomphosis of the fixed end of middle fixed cover 22 is connected gomphosis adapter sleeve 25, the gomphosis adapter sleeve is fixed the tip of fracturing pipe, 16 fixed cover of back hydraulic pressure inflation cover are established on the pressure pipe, just lie in on the fracturing pipe preceding hydraulic pressure inflation cover 17 and back hydraulic pressure inflation cover still are provided with fracturing fluid drain hole 23 between 16.
The end part of the control pipe is provided with an inner connection joint 20 extending into the inner connection joint, the inner end of the inner connection joint 20 is communicated with the front hydraulic expansion sleeve 17 so as to control the expansion of the front hydraulic expansion sleeve 17, and the control pipe is communicated with the rear hydraulic expansion sleeve by adopting a radial communicating pipe 26 so as to control the expansion of the rear hydraulic expansion sleeve.
The internal connection joint 20 is blocked on the fixed end sleeve 21 and passes through the middle fixed sleeve 22 and the embedded connecting sleeve 25 in sequence, and a locking spring 24 is further arranged between the middle fixed sleeve 22 and the embedded connecting sleeve 25.
And a liquid inlet joint 19 is communicated with the front hydraulic expansion sleeve 17, and the liquid inlet joint 19 is positioned in the central cavity of the internal connection joint 20. The fracturing pipe and the control pipe are connected in a multi-section sequentially detachable mode.
The staged fracturing control head mechanism is connected with the control pipe, the staged fracturing control head mechanism is controlled by the control pipe, the fracturing capacity and the fracturing effect are effectively ensured, the feeding and feeding adjusting mechanism can also axially feed and feed the staged fracturing control head mechanism, the staged fracturing operation of the staged fracturing control head mechanism on different underground positions is realized, the front hydraulic expansion sleeve and the rear hydraulic expansion sleeve are sealed with the hole wall of the fracturing hole 18 after being expanded, so that a fracturing cavity is formed between the front hydraulic expansion sleeve and the rear hydraulic expansion sleeve to realize the fracturing of the zone, and the fracturing is simple and convenient.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (10)
1. An unconventional reservoir staged fracturing device comprises a fracturing fluid supply device (1), a staged control device (12), a fracturing pipe (11), a control pipe (9) and a staged fracturing control head mechanism (10), and is characterized in that the output end of the fracturing fluid supply device (1) is connected to the fracturing pipe (11) through a liquid supply pipe (2), the center of the fracturing pipe is coaxially sleeved with the control pipe (9), the control pipe (9) is in control connection with the staged control device (12), the staged fracturing control head mechanism (10) is arranged at the front end of the fracturing pipe, and the staged fracturing control head mechanism (10) is further connected with the control pipe (9) so as to control the staged fracturing control head mechanism (10);
the staged fracturing control head mechanism is characterized by further comprising a feeding and feeding adjusting mechanism, wherein the feeding and feeding adjusting mechanism can axially feed and feed the staged fracturing control head mechanism (10), so that staged fracturing operation can be performed on different underground positions by the staged fracturing control head mechanism (10).
2. An unconventional reservoir staged fracturing device according to claim 1, wherein the outer end of the fracturing pipe (11) is provided with a connecting radial hole which can be plugged by a plug, a radial joint (8) is arranged in the connecting radial hole, the radial joint is connected with the liquid supply pipe (2), and a cavity between the fracturing pipe (11) and the control pipe is configured as a flow passage of the fracturing liquid.
3. The unconventional reservoir staged fracturing device according to claim 2, wherein the feeding and feeding adjusting mechanism comprises a feeding hydraulic cylinder (3), a frame (15), a connecting seat (4), a positioning plate (5) and a guiding plate (7), wherein the feeding hydraulic cylinder is fixed on the frame, the connecting seat fixed at the output end of the feeding hydraulic cylinder is arranged on the inner side of the frame, the positioning plate is connected to the connecting seat, the guiding plate is fixedly connected to the end of the frame, the positioning plate can position and push the fracturing pipe (13) to be installed and fed and the control pipe (6) to be fed, and a guiding hole for the fracturing pipe and the control pipe to pass through is formed in the guiding plate.
4. The unconventional reservoir staged fracturing device of claim 3, wherein an intermediate connecting frame (14) is further arranged between the machine frame and the guide disc, and the intermediate connecting frame is of a door-shaped structure.
5. The unconventional reservoir staged fracturing device of claim 3, wherein the staged fracturing control head mechanism (10) comprises a front hydraulic expansion sleeve (17), a rear hydraulic expansion sleeve (16) and a fracturing mechanism, wherein the front hydraulic expansion sleeve is fixed at the front end of the fracturing mechanism, the rear hydraulic expansion sleeve (16) is arranged at the rear end of the fracturing mechanism, the fracturing pipe (11) is communicated with the fracturing mechanism and is arranged at the front ends of the fracturing pipe and the control pipe (9), and the front hydraulic expansion sleeve (17) and the rear hydraulic expansion sleeve (16) are both connected with the control pipe (9).
6. The unconventional reservoir staged fracturing device according to claim 5, wherein the fracturing mechanism comprises a fixed end sleeve (21), an intermediate fixed sleeve (22) and an embedded connecting sleeve (25), wherein one side of the fixed end sleeve is fixedly connected with the front hydraulic expansion sleeve (17), the other side of the fixed end sleeve is fixedly connected with the intermediate fixed sleeve, the end part of the intermediate fixed sleeve (22) is fixedly embedded and connected with the embedded connecting sleeve (25), the embedded connecting sleeve is fixed at the end part of the fracturing pipe, the rear hydraulic expansion sleeve (16) is fixedly sleeved on the pressure pipe, and a fracturing fluid outlet (23) is further arranged between the front hydraulic expansion sleeve (17) and the rear hydraulic expansion sleeve (16) on the fracturing pipe.
7. An unconventional reservoir staged fracturing device according to claim 6, wherein the end of the control pipe is provided with an internal connection joint (20) extending into the internal connection joint, the inner end of the internal connection joint (20) is communicated with the front hydraulic expansion sleeve (17) to control the expansion of the front hydraulic expansion sleeve (17), and the control pipe is communicated with the rear hydraulic expansion sleeve by a radial communicating pipe (26) to control the expansion of the rear hydraulic expansion sleeve.
8. The staged fracturing device for unconventional reservoir stratum as claimed in claim 7, wherein the interconnecting joint (20) is clamped on the fixed end sleeve (21) and sequentially passes through the middle fixed sleeve (22) and the embedded connecting sleeve (25), and a locking spring (24) is further arranged between the middle fixed sleeve (22) and the embedded connecting sleeve (25).
9. An unconventional reservoir staged fracturing device according to claim 5, wherein a liquid inlet joint (19) is arranged on the front hydraulic expansion sleeve (17) in a communicating manner, and the liquid inlet joint (19) is positioned in a central cavity of the inner connecting joint (20).
10. The unconventional reservoir staged fracturing device of claim 5, wherein the fracturing pipe and the control pipe are detachably connected in multiple sections in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010016169.1A CN111005708B (en) | 2020-01-07 | 2020-01-07 | Unconventional reservoir staged fracturing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010016169.1A CN111005708B (en) | 2020-01-07 | 2020-01-07 | Unconventional reservoir staged fracturing device |
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| CN111005708A true CN111005708A (en) | 2020-04-14 |
| CN111005708B CN111005708B (en) | 2022-02-01 |
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Cited By (2)
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| CN113719264A (en) * | 2021-09-09 | 2021-11-30 | 中国石油化工股份有限公司 | Fracturing device for realizing high-efficiency supporting of compact reservoir volume fracturing |
| US11692423B1 (en) | 2021-12-23 | 2023-07-04 | Southwest Petroleum University | Method for realizing uniform stimulation for the oil and gas well by low-cost multi-stage fracturing |
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| CN111005708B (en) | 2022-02-01 |
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