CN109989735B - Hydraulic releasing multi-cluster perforation combined fracturing sealing device - Google Patents
Hydraulic releasing multi-cluster perforation combined fracturing sealing device Download PDFInfo
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- CN109989735B CN109989735B CN201711474006.2A CN201711474006A CN109989735B CN 109989735 B CN109989735 B CN 109989735B CN 201711474006 A CN201711474006 A CN 201711474006A CN 109989735 B CN109989735 B CN 109989735B
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- connecting shaft
- fracturing
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/11—Perforators; Permeators
- E21B43/116—Gun or shaped-charge perforators
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The invention discloses a hydraulic releasing multi-cluster perforation combined fracturing sealing device, and belongs to the field of oilfield fracturing well completion tools. The hydraulic releasing multi-cluster perforation combined fracturing sealing device comprises: when the device is configured into a plurality of clusters of perforation, high-pressure liquid is injected into a well, the high-pressure liquid acts on the lower end face of the sealing support, so that the shear pin is sheared under the action of pressure difference formed between the upper end face and the lower end face of the sealing support, the sealing support and the control sleeve move upwards, the connector is separated from the connecting shaft, the releasing is realized, and then a cable or a coiled tubing is moved upwards, so that the plurality of clusters of perforating guns carry out the plurality of clusters of perforation at the designed position; when the device is configured to be fractured after multiple cluster shooting holes are completed, fracturing fluid is injected into the well and flows through the inside of the connecting shaft and the inside of the sealing head, so that the ball body is seated on the ball seat to be fractured.
Description
Technical Field
The invention relates to the field of oilfield fracturing completion tools, in particular to a hydraulic releasing multi-cluster perforation combined fracturing sealing device.
Background
The development work of the shale oil and gas reservoir in China is in the starting stage, the difference between the development work and the development work is large, and many technical bottlenecks restricting the development of the shale oil and gas in China are in urgent need to be broken through. And the multi-cluster perforation fracturing is one of important means for carrying out fracturing modification on a reservoir of a shale oil and gas reservoir.
The current commonly used multi-cluster perforation fracturing method is that a plurality of clusters of perforation guns and drillable bridge plugs are conveyed into a shaft by using a continuous oil pipe or a cable, perforation and fracturing operations are carried out after the shaft is sealed by the drillable bridge plugs, and the drillable bridge plugs are removed in the later period to realize the upper and lower drift diameters in the shaft.
In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art:
the prior art needs to perform setting on a drillable bridge plug, has high process requirement, is mainly mastered by foreign companies, and has high use price and high production cost.
Disclosure of Invention
In view of the above, the invention provides a hydraulic releasing multi-cluster perforation combined fracturing sealing device for replacing a drillable bridge plug and a setting tool, which is used for multi-cluster perforation and well completion fracturing transformation of a shale oil and gas well so as to reduce the production cost.
Specifically, the method comprises the following technical scheme:
a hydraulic release multi-cluster perforation combined fracturing sealing device is arranged in a valve sleeve and comprises: a joint, a control sleeve, a connecting shaft, a sealing support, a sealing head and a ball body, wherein,
the joint is a sealing joint, the upper end of the joint is connected with a cable or a coiled tubing, the lower end of the joint is arranged in the upper end of the control sleeve, and the sealing support is arranged in the lower end of the control sleeve;
the connecting shaft is hollow, and the upper end of the connecting shaft is arranged in the lower end of the joint and is connected with the sealing support through a shear pin;
the sealing head is hollow and is communicated with the inside of the connecting shaft; the sealing head is sleeved at the lower end of the connecting shaft, and the outer wall of the sealing head is buckled in the valve seat on the inner wall of the valve sleeve;
an annular groove is formed in the connecting shaft, and the ball body is movably arranged in the annular groove; a ball seat suitable for being set by the ball body is arranged in the sealing head;
when the device is configured to be a plurality of clusters of perforation holes, injected high-pressure fluid flows into the lower end face of the sealing support, the shear pins are sheared under the action of the pressure difference formed between the upper end face and the lower end face of the sealing support, the sealing support and the control sleeve move upwards, and the joint is separated from the connecting shaft; the wellhead equipment moves the cable or the coiled tubing, and clusters of perforating guns connected to the cable or the coiled tubing are arranged at the designed positions to perform multiple clusters of perforating;
when the device is configured to be fractured after the multiple shower holes are completed, injected fracturing fluid flows through the inside of the connecting shaft and the inside of the sealing head, and the ball body is seated on the ball seat for fracturing.
Optionally, the lower part of the joint is provided with a first through hole, the upper part of the connecting shaft is provided with a first groove, and the locking block penetrates through the first through hole and is buckled in the first groove.
Optionally, a first internal thread section is arranged on the inner wall of the lower end of the control sleeve, and a first external thread section is arranged on the outer wall of the sealing support and is adapted to be matched with the first external thread section.
Optionally, the device further comprises a first safety pin extending through the control sleeve where the first internally threaded section is located and the first externally threaded section.
Optionally, the wall of the connecting shaft is provided with a drainage hole, and the drainage hole can communicate the inside and the outside of the connecting shaft when the device is configured into a plurality of clusters of perforations.
Optionally, the apparatus further comprises resilient cushioning means disposed inside the sealing head and adapted to contact the ball.
Optionally, a second external thread section is arranged on the outer wall of the lower end of the connecting shaft, a second internal thread section is arranged on the inner wall of the sealing head, and the second internal thread section is suitable for being matched with the second external thread section.
Optionally, the device further comprises a second safety pin extending through the sealing head where the second internal thread section is located and the second external thread section.
Optionally, the ball seat is an annular inclined surface, and the area enclosed by the annular inclined surface is smaller than the maximum cross-sectional area of the ball body.
Optionally, the angle between the plane of the annular ramp and the horizontal plane is 30 °.
The technical scheme provided by the embodiment of the invention has the beneficial effects that:
the embodiment of the invention provides a hydraulic releasing multi-cluster perforation combined fracturing sealing device, which is characterized in that the upper end of a joint is connected with a cable or a coiled tubing, so that the device can be lowered into a well through lowering the cable or the coiled tubing and reaches the position of a valve sleeve; moving the cable or the coiled tubing through wellhead equipment, connecting a plurality of clusters of perforating guns on the cable or the coiled tubing to a designed position, performing a plurality of clusters of perforating, and after the plurality of clusters of perforating guns are completed, putting forward a plurality of clusters of perforating guns, joints, sealing supports and control sleeves; when the device is configured to fracture after multiple cluster perforation, fracturing fluid is injected into the well and flows through the inside of the connecting shaft and the inside of the sealing head, so that the ball body is seated on the ball seat under the action of the fracturing fluid to perform fracturing.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a hydraulic releasing multi-cluster perforation combined fracturing sealing device provided by an embodiment of the invention;
fig. 2 is a schematic structural view of a valve sleeve provided in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of the seat and valve seat cooperation of the hydraulic releasing multi-cluster perforation combined fracturing sealing device provided by the embodiment of the invention;
FIG. 4 is a schematic structural diagram of a hydraulic releasing multi-cluster perforation combined fracturing sealing device provided by the embodiment of the invention after being released;
fig. 5 is a schematic structural view of the valve seat in fig. 2 after being drilled.
The reference numerals are respectively indicated as:
1. a valve housing;
101. a valve seat;
2. a joint;
201. a third external thread section;
3. a control sleeve;
301. a first internal thread segment;
302. a third internal thread segment;
4. a connecting shaft;
401. an annular groove;
402. a drain hole;
403. a second outer thread section;
5. sealing the support;
501. a first external thread section;
6. a sealing head;
601. a ball seat;
602. a second internal thread segment;
7. a sphere;
8. shearing the nails;
9. a locking block;
10. an elastic buffer device;
11. a first safety pin;
12. a second safety pin;
13. a first seal ring;
14. a second seal ring;
15. a third seal ring;
16. and a fourth seal ring.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the following will describe embodiments of the present invention in further detail with reference to the accompanying drawings.
The embodiment of the invention provides a hydraulic releasing multi-cluster perforation combined fracturing sealing device which is arranged in a valve sleeve 1, wherein the structural schematic diagram of the valve sleeve 1 is shown in figure 2, the valve sleeve 1 is matched and connected with a casing to be put into a well, a valve seat 101 is arranged in the valve sleeve 1, and the valve seat 101 is suitable for being matched with a sealing head 6, so that the device is seated on the valve seat 101.
Specifically, the schematic structural diagram of the device is shown in fig. 1, and the device comprises: the device comprises a joint 2, a control sleeve 3, a connecting shaft 4, a sealing support 5, a sealing head 6 and a ball body 7.
Wherein, the joint 2 is a sealing joint, the upper end of the joint 2 is connected with a cable or a coiled tubing (not shown in the figure), the lower end of the joint 2 is arranged in the upper end of the control sleeve 3, and the sealing support 5 is arranged in the lower end of the control sleeve 3;
the connecting shaft 4 is hollow, the upper end of the connecting shaft 4 is arranged in the lower end of the joint 2 and is connected with the sealing support 5 through a shear pin 8;
the sealing head 6 is hollow and communicated with the inside of the connecting shaft 4; the sealing head 6 is sleeved at the lower end of the connecting shaft 4, and the outer wall of the sealing head 6 is buckled in the valve seat 101 on the inner wall of the valve sleeve 1, as shown in fig. 3;
an annular groove 401 is formed in the connecting shaft 4, and the ball 7 is movably arranged in the annular groove 401; a ball seat 601 suitable for being set by the ball body 7 is arranged in the sealing head 6;
when the device is configured to be a plurality of clusters of perforations, the upper end of the joint 2 is connected with a cable or a continuous oil pipe (not shown in the figure), the injected high-pressure fluid flows into the lower end face of the sealing support 5, the shear pin 8 is sheared under the action of the pressure difference formed between the upper end face and the lower end face of the sealing support 5, the sealing support 5 and the control sleeve 3 move upwards, and the joint 2 is separated from the connecting shaft 4; a wellhead device (not shown in the figure) moves a cable or a coiled tubing, and a plurality of clusters of perforating guns (not shown in the figure) connected to the cable or the coiled tubing are moved to a design position to perform a plurality of clusters of perforation;
when the device is configured to fracture after the multi-shower hole is completed, as shown in fig. 4, the injected fracturing fluid flows through the inside of the connecting shaft 4 and the inside of the sealing head 6, and the ball 7 is seated on the ball seat 601 to fracture.
Therefore, the hydraulic releasing multi-cluster perforation combined sealing device provided by the embodiment of the invention utilizes the connector 2, the control sleeve 3, the connecting shaft 4, the sealing support 5, the sealing head 6 and the ball body 7, and is connected with the cable or the coiled tubing at the upper end of the connector 2, so that the device can be lowered into a well through lowering the cable or the coiled tubing and reach the position of the valve sleeve 1, high-pressure liquid is injected into the well, when the injected high-pressure liquid flows into the lower end surface of the sealing support 5, the shear pin 8 is sheared under the action of pressure difference formed between the upper end surface and the lower end surface of the sealing support 5, the sealing support 5 and the control sleeve 3 move upwards, the connector 2 is separated from the connecting shaft 4, and hydraulic releasing is realized; moving the cable or the coiled tubing through wellhead equipment, connecting a plurality of clusters of perforating guns on the cable or the coiled tubing to a designed position, performing a plurality of clusters of perforating, and after the plurality of clusters of perforating guns are completed, putting the plurality of clusters of perforating guns, the connector 2, the sealing support 5 and the control sleeve 3 out; when fracturing transformation is needed after perforation is completed, fracturing fluid is injected into the well, the fracturing fluid flows through the inside of the connecting shaft 4 and the inside of the sealing head 6, the ball body 7 is seated on the ball seat 601 for fracturing, the device replaces drillable bridge plugs and seating tools in the prior art, construction procedures are simplified, multi-cluster perforation and fracturing well completion transformation of shale oil and gas wells are realized at lower price, and production cost is reduced.
It should be noted that when the device is not configured as a plurality of clusters of perforations, the ball 7 is not completely seated on the ball seat 601, and is in a normally open state, and low-pressure liquid can flow out of the device through the space between the ball 7 and the ball seat 601; when the device is configured to fracture after multiple clusters of perforating guns are completed, the clusters of perforating guns are lifted out of the wellhead together with the connector 2, the seal holder 5 and the control sleeve 3.
Based on the device, the structure in the hydraulic releasing multi-cluster perforation combined fracturing sealing device and the matching structure of the hydraulic releasing multi-cluster perforation combined fracturing sealing device and the valve sleeve 1 in the embodiment of the invention are described in detail as follows:
for the hydraulic releasing multi-cluster perforation combined fracturing sealing device provided by the embodiment of the invention, in order to ensure that the joint 2 is firmly connected with the connecting shaft 4, the lower part of the joint 2 is provided with a first through hole, the upper part of the connecting shaft 4 is provided with a first groove, and the locking block 9 can pass through the first through hole and be buckled in the first groove, as shown in fig. 1, so that the joint 2 and the connecting shaft 4 can be fixedly connected together through the locking block 9, and the integrity of the device when the device is put into a well is ensured.
When the shear pin 8 is sheared, the locking block 9 is buckled in the first groove, the sealing support 5 is separated from the connecting shaft 4, the locking block 9 is driven to be separated from the first groove, the connection relation between the joint 2 and the connecting shaft 4 is further relieved, the sealing support 5 can drive the control sleeve 3 connected with the sealing support to move, the control sleeve 3 can drive the joint 2 connected with the control sleeve to move, and finally the sealing support 5, the control sleeve 3, the joint 2 and the connecting shaft 4 are separated.
In order to ensure the implementation of hydraulic releasing, in the connection setting, on one hand, a first internal thread section 301 is arranged on the inner wall of the lower end of the control sleeve 3, a first external thread section 501 is arranged on the outer wall of the sealing support 5, and the first internal thread section 301 is suitable for being matched with the first external thread section 501, so that the control sleeve 3 and the sealing support 5 are firmly connected, and the control sleeve 3 and the sealing support 5 can move together when high-pressure liquid is injected to realize releasing.
Meanwhile, in order to strengthen the connection and fixation relationship between the control sleeve 3 and the seal holder 5, the device further comprises a first safety nail 11, and the first safety nail 11 penetrates through the control sleeve 3 where the first internal thread section 301 is located and the first external thread section 501, so that the fixation relationship between the control sleeve 3 and the seal holder 5 is further strengthened.
On the other hand, the upper end of the control sleeve 3 extends inwards to form a flange, a third internal thread section 302 is arranged on the flange, a third external thread section 201 is arranged on the outer wall of the joint 2, and the third internal thread section 302 is suitable for being matched with the third external thread section 201, so that the joint 2 and the control sleeve 3 are firmly connected, the joint 2 can move together with the control sleeve 3 and the sealing support 5 when high-pressure liquid is injected to realize releasing, and the locking block 9 is convenient to release.
It should be noted that when the device is released, namely the sealing support 5, the control sleeve 3 and the joint 2 are separated from the connecting shaft 4, a plurality of clusters of perforating guns are driven to a designed position by lifting or lowering a cable or a continuous oil pipe by means of wellhead equipment to perform a plurality of clusters of perforating; at the same time, the device is fitted to the valve housing 1 as shown in fig. 4, and the liquid can flow directly into the interior of the connecting shaft 4.
After completing the multiple clusters of perforations, the multiple clusters of perforating guns, the joints 2, the seal holder 5 and the control sleeve 3 are lifted out through lifting cables or coiled tubing.
When the device is configured to be multi-cluster perforation, since part of low-pressure liquid can flow into the connecting shaft 4 and the control sleeve 3 before the shear pins 8 are not sheared, in the structural arrangement, as shown in fig. 1, the wall of the connecting shaft 4 is provided with a drain hole 402, and as shown in fig. 1, the drain hole 402 can communicate the inside and the outside of the connecting shaft 4 when the device is configured to be multi-cluster perforation.
The arrangement is such that low pressure liquid remaining in the device can exit the device through the drain hole 402, through the interior of the connecting shaft 4 and the ball seat 601. When the shear pin 8 is not sheared, the inside of the device is in a sealed state, the ball 7 is not seated on the ball seat 601, and a small amount of liquid can flow out of the device through the space between the ball 7 and the ball seat 601.
In order to facilitate the outflow of a small amount of liquid through the space between the ball 7 and the ball seat 601, the device further comprises an elastic buffer means 10, the elastic buffer means 10 is disposed inside the sealing head and is adapted to contact with the ball 7, so that the ball 7 can be spaced from the ball seat 601 by a certain distance under the elastic action of the elastic buffer means 10, thereby facilitating the discharge of a small amount of low-pressure liquid from the device.
For the matching structure of the device and the valve sleeve 1, the outer wall of the lower end of the connecting shaft 4 is provided with the second external thread section 403, the inner wall of the sealing head 6 is provided with the second internal thread section 602, and the second internal thread section 602 is suitable for being matched with the second external thread section 403, so that the connecting shaft 4 and the sealing head 6 are firmly connected, and the connecting shaft 4 can be stably connected with the sealing head 6 and fixed on the valve seat 101 when high-pressure liquid is injected to realize releasing.
Meanwhile, in order to strengthen the connection and fixation relationship between the connecting shaft 4 and the sealing head 6, the device further comprises a second safety nail 12, and the second safety nail 12 penetrates through the sealing head 6 where the second internal thread section 602 is located and the second external thread section 403, so that the fixation relationship between the connecting shaft 4 and the sealing head 6 is further strengthened.
In order to smoothly implement the fracturing process after the hydraulic release, it is necessary to ensure the matching of the ball body 7 and the ball seat 601, wherein the ball seat 601 is an annular inclined surface, and the area enclosed by the annular inclined surface is smaller than the maximum cross-sectional area of the ball body 7, so that the ball body 7 can be completely seated on the annular inclined surface. In the embodiment of the invention, the angle between the plane of the annular inclined plane and the horizontal plane is 30 degrees, so that the ball 7 can be conveniently set.
In order to ensure the sealing performance of the hydraulic releasing multi-cluster perforation combined sealing device provided by the embodiment of the invention, the structural arrangement is as follows: (1) a first sealing groove is formed in the outer wall of the joint 2, which is in contact with the connecting shaft 4, and a first sealing ring 13 is suitable for being arranged in the first sealing groove and used for sealing the joint 2 and the connecting shaft 4 so as to ensure the sealing property between the joint 2 and the connecting shaft 4; (2) a second sealing groove is formed in the outer wall of the sealing support 5, which is in contact with the control sleeve 3, and a second sealing ring 14 is suitable for being arranged in the second sealing groove and used for sealing the control sleeve 3 and the sealing support 5 so as to ensure the sealing property between the control sleeve 3 and the sealing support 5; (3) a third sealing groove is formed in the outer wall, which is in contact with the sealing support 5, of the connecting shaft 4, and a third sealing ring 15 is suitable for being arranged in the third sealing groove and used for sealing the connecting shaft 4 and the sealing support 5 so as to ensure the sealing property between the connecting shaft 4 and the sealing support 5; (4) the connecting shaft 4 is provided with a fourth sealing groove on the outer wall contacting with the sealing head 6, and a fourth sealing ring 16 is suitable for being arranged in the fourth sealing groove and used for sealing the connecting shaft 4 and the sealing head 6 so as to ensure the sealing property between the connecting shaft 4 and the sealing head 6.
So set up for the device has good leakproofness on the whole at the in-process of going into, ensures the smooth completion of giving up.
It can be understood by those skilled in the art that the hydraulic releasing multi-cluster perforation combined fracturing sealing device of the embodiment of the invention can be used not only in the multi-cluster perforation and fracturing process of a conventional well, but also in the multi-cluster perforation and fracturing process of a horizontal well, and the type of the well used is not particularly limited in the embodiment of the invention.
In the actual use process, the device with the same number of valve sleeves 1 can be delivered for multiple times to realize the multi-cluster perforation and fracturing of different layers according to the requirements of multi-cluster perforation and fracturing of a selected well by matching the valve sleeves 1 with corresponding numbers through the casing and running into the well.
Taking a sleeve pipe connected with a valve sleeve 1 as an example, when a selected well needs to be perforated in multiple clusters, a cable or a continuous oil pipe connected with multiple clusters of perforating guns and the device is lowered into the well, when the device is seated on a valve seat 101 in the valve sleeve 1, high-pressure water is injected into the well, so that the pressure in the sleeve pipe is suppressed, when the injected high-pressure water flows into the lower end face of a sealing support 5, pressure difference is formed between the upper end face and the lower end face of the sealing support 5 due to internal sealing of the device, a shear pin 8 is sheared under the action of the pressure difference, the sealing support 5 and a control sleeve 3 move upwards, a locking block 9 loses constraint, and a connector 2 is separated from a connecting shaft 4; then, a cable or a coiled tubing is lifted or lowered to a designed position through wellhead equipment, and the multi-cluster perforating gun performs multi-cluster perforating at the designed position;
after completing the multiple clusters of perforations, the multiple clusters of perforating guns, the joints 2, the seal holder 5 and the control sleeve 3 are lifted out through lifting cables or coiled tubing.
When needs carry out the fracturing, pour into fracturing fluid into the well, fracturing fluid flows through the inside of connecting axle 4 and the inside of sealed head 6 for spheroid 7 sits and seals on ball seat 601, through the cooperation of spheroid 7 with ball seat 601, makes fracturing fluid can only remain the upper portion of device and device, carries out the fracturing.
After fracturing is finished, the fracturing fluid can be directly produced. If the production needs, the upper part of the connecting shaft 4 can be fished by lowering a conventional fishing pipe column, the pipe column is lifted, and the connecting shaft 4, the sealing head 6, the ball body 7 and the elastic buffer device 10 are fished out of the well mouth; or a drilling tool can be put in to drill the connecting shaft 4, the sealing head 6, the ball body 7, the elastic buffer device 10 and the valve seat 101, and the effect after drilling is shown in figure 5, so that the valve sleeve 1 is consistent with the inner diameter of the sleeve, and later-period operation is facilitated.
The above description is only for facilitating the understanding of the technical solutions of the present invention by those skilled in the art, and is not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A hydraulic releasing multi-cluster perforation combined fracturing sealing device is arranged in a valve sleeve (1), and is characterized by comprising: a joint (2), a control sleeve (3), a connecting shaft (4), a sealing support (5), a sealing head (6) and a ball body (7), wherein,
the joint (2) is a sealing joint, the lower end of the joint (2) is arranged in the upper end of the control sleeve (3), and the sealing support (5) is arranged in the lower end of the control sleeve (3);
the connecting shaft (4) is hollow, and the upper end of the connecting shaft (4) is arranged in the lower end of the joint (2) and is connected with the sealing support (5) through a shear pin (8);
the sealing head (6) is hollow and is communicated with the inside of the connecting shaft (4); the sealing head (6) is sleeved at the lower end of the connecting shaft (4), and the outer wall of the sealing head (6) is buckled in a valve seat (101) on the inner wall of the valve sleeve (1);
an annular groove (401) is formed in the connecting shaft (4), and the ball body (7) is movably arranged in the annular groove (401); a ball seat (601) suitable for being set by the ball body (7) is arranged in the sealing head (6);
when the device is configured to be a plurality of clusters of perforations, the upper end of the joint (2) is connected with a cable or a coiled tubing, injected high-pressure liquid flows into the lower end face of the sealing support (5), the shear pin (8) is sheared under the action of pressure difference formed between the upper end face and the lower end face of the sealing support (5), the sealing support (5) and the control sleeve (3) move upwards, and the joint (2) is separated from the connecting shaft (4); the wellhead equipment moves the cable or the coiled tubing, and clusters of perforating guns connected to the cable or the coiled tubing are arranged at the designed positions to perform multiple clusters of perforating;
when the device is configured to be fractured after the multi-shower hole is completed, injected fracturing fluid flows through the inside of the connecting shaft (4) and the inside of the sealing head (6), and the ball body (7) is set on the ball seat (601) to perform fracturing.
2. The hydraulic release multi-cluster perforation combined fracturing sealing device of claim 1, wherein a first through hole is formed in the lower portion of the connector (2), a first groove is formed in the upper portion of the connecting shaft (4), and the locking block (9) penetrates through the first through hole and is clamped in the first groove.
3. A hydraulic release multiple-perforation coordinated fracturing sealing device according to claim 1, wherein the inner wall of the lower end of the control sleeve (3) is provided with a first internal thread section (301), the outer wall of the sealing support (5) is provided with a first external thread section (501), and the first internal thread section (301) is adapted to be matched with the first external thread section (501).
4. A hydraulic release multiple perforation coordinated fracturing sealing device according to claim 3, characterized in that the device further comprises a first safety nail (11), the first safety nail (11) penetrating the control sleeve (3) where the first internal thread section (301) is located and the first external thread section (501).
5. The hydraulic release multiple-perforation linkage fracturing sealing device according to claim 1, wherein a drain hole (402) is formed in the wall of the connecting shaft (4), and the drain hole (402) is communicated with the inside and the outside of the connecting shaft (4) when the device is configured to be multiple-perforation.
6. A hydraulic release multiple perforation coordinated fracturing sealing device according to claim 1, characterized in that the device further comprises an elastic buffer means (10), the elastic buffer means (10) being arranged inside the sealing head (6) and adapted to be in contact with the ball (7).
7. The hydraulic release multi-cluster perforation combined fracturing sealing device of claim 1, wherein a second external thread section (403) is arranged on the outer wall of the lower end of the connecting shaft (4), a second internal thread section (602) is arranged on the inner wall of the sealing head (6), and the second internal thread section (602) is suitable for being matched with the second external thread section (403).
8. The hydraulic release multi-cluster perforation coordinated fracturing sealing device of claim 7, further comprising a second safety nail (12), wherein the second safety nail (12) penetrates through the sealing head (6) where the second internal thread section (602) is located and the second external thread section (403).
9. The hydraulic release multiple-cluster perforation coordinated fracturing seal device of claim 1, wherein the ball seat (601) is an annular slope, and the area enclosed by the annular slope is smaller than the maximum cross-sectional area of the ball body (7).
10. The hydraulic release multi-cluster perforation coordinated fracturing seal device of claim 9, wherein the angle between the plane of the annular chamfer and the horizontal plane is 30 °.
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| CN201711474006.2A CN109989735B (en) | 2017-12-29 | 2017-12-29 | Hydraulic releasing multi-cluster perforation combined fracturing sealing device |
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| CN201711474006.2A CN109989735B (en) | 2017-12-29 | 2017-12-29 | Hydraulic releasing multi-cluster perforation combined fracturing sealing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2373561Y (en) * | 1999-05-31 | 2000-04-12 | 阜新市石油工具厂 | Fish-up-type fracture bridge plug |
| CN201786344U (en) * | 2010-09-29 | 2011-04-06 | 中国石油集团西部钻探工程有限公司 | Multistage fracturing tool |
| CN105464601A (en) * | 2015-12-24 | 2016-04-06 | 中国石油天然气股份有限公司 | Multipurpose releasing tool capable of being used for continuous operation |
| US20160108711A1 (en) * | 2014-10-16 | 2016-04-21 | John M. Lynk | Sliding Sleeve For Stimulating A Horizontal Wellbore, And Method For Completing A Wellbore |
| CN205225224U (en) * | 2015-11-04 | 2016-05-11 | 中国石油天然气股份有限公司 | Hole fracturing well completion devices that shower more |
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2017
- 2017-12-29 CN CN201711474006.2A patent/CN109989735B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2373561Y (en) * | 1999-05-31 | 2000-04-12 | 阜新市石油工具厂 | Fish-up-type fracture bridge plug |
| CN201786344U (en) * | 2010-09-29 | 2011-04-06 | 中国石油集团西部钻探工程有限公司 | Multistage fracturing tool |
| US20160108711A1 (en) * | 2014-10-16 | 2016-04-21 | John M. Lynk | Sliding Sleeve For Stimulating A Horizontal Wellbore, And Method For Completing A Wellbore |
| CN205225224U (en) * | 2015-11-04 | 2016-05-11 | 中国石油天然气股份有限公司 | Hole fracturing well completion devices that shower more |
| CN105464601A (en) * | 2015-12-24 | 2016-04-06 | 中国石油天然气股份有限公司 | Multipurpose releasing tool capable of being used for continuous operation |
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| CN109989735A (en) | 2019-07-09 |
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