Patent Grant
12104460
The present application relates to the technical field of oil and gas field development, in particular to a full-bore infinite-level staged fracturing sliding sleeve based on a smart label and an implementation method thereof.
The multi-stage fracturing technology of horizontal wells is the key to the development of oil and gas fields. As the three major technology series, the pumped bridge plug and perforation staged fracturing technology, the multi-level sliding sleeve packer staged fracturing technology, and the hydraulic jet staged fracturing technology provide strong technical support to increase the transformation effect of oil and gas field reservoirs and effectively use the oil and gas field reservoirs on a large scale.
At present, the main staged fracturing mode of oil and gas fields at home and abroad is the pumped bridge plug and perforation technology, which can meet the construction needs of large fluid volume and large displacement, has a unlimited number of pumped perforation fracturing stages, and can carry out large-scale sand fracturing. However, when using the pumped bridge plug and perforation technology, the construction time is long, the ground cross operation is complicated, and cable breakage and tool falling accidents are easy to occur when the tools encounter obstacles. As a result, synchronous fracturing and zipper fracturing cannot be implemented smoothly, which greatly affects the efficiency of the fracturing construction. The multi-level sliding sleeve packer staged fracturing technology enters the sliding sleeve tool with the casing in the horizontal section cementing, and the fracturing of each stage is carried out by opening the sliding sleeve through the coiled tubing dragging or ball. Although the indefinite-level fracturing sliding sleeve performed by the coiled tubing dragging can achieve a full-bore effect, due to the limitation of the size of the coiled tubing and the packer tool in the well during fracturing, the fracturing construction displacement is limited. In the ball sliding sleeve staged fracturing, due to the existence of the difference of the ball seats of different stages, a diameter of the sliding sleeve gradually decreases as the sliding sleeve moves downwards, thus, the number of fracturing stages is limited. In the hydraulic jet staged fracturing technology, the wellhead pressure is high, the construction safety risk is high, and the displacement and sanding scale are limited.
The present disclosure aims to provide a full-bore indefinite-level staged fracturing sliding sleeve based on a smart label and an implementation thereof, which can achieve large-bore, full-bore, indefinite-level staged fracturing in a well.
In an aspect, the present disclosure provides a full-bore indefinite-level staged fracturing sliding sleeve based on a smart label; the fracturing sliding sleeve includes an outer housing (203), a sandblasting port (204) arranged on the outer housing (203), an identification module (202) arranged in the outer housing (203) for indicating an address of a fracturing sliding sleeve of the current stage, and a valve core (205) driven by a smart label to move horizontally to open and close the sandblasting port (204), the smart label is capable of identifying the identification module (202) to be clamped and seated at the valve core (205);
In another aspect, the present disclosure further provides an implementation method of the above full-bore indefinite-level staged fracturing sliding sleeve based on a smart label, including:
In order to explain the technical solutions in the embodiments of the present disclosure or the prior art more clearly, the drawings used by the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description may be merely some embodiments of the present disclosure. For those of ordinary skilled in the art, other drawings may be obtained according to the structures shown in the drawings without creative effort.
The realization of the purpose, functional features and advantages of the present application will be further described with reference to the accompanying drawings in conjunction with the embodiments.
In the following, the technical solutions in the embodiments of the present disclosure will be clearly and completely described with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments may be only a part of the embodiments of the present disclosure, but not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by those of ordinary skilled in the art without creative effort shall fall within the protection scope of the present disclosure.
A full-bore infinite-level staged fracturing sliding sleeve based on a smart label includes a smart label 1 and a full-bore infinite-level staged fracturing sliding sleeve 2 (hereinafter as “fracturing sliding sleeve 2”).
As shown in
As shown in
In the smart label 1, the power supply 102 is mounted in the outer housing 101, which is used to supply power to the execution module 104 and the detection module 107.
A mounting slot is formed in the outer housing 101. The at least one gripper 103 is evenly arranged in the mounting slot along a circumferential direction and is connected to the execution module 104 inside the outer housing. When being driven by the execution module 104, the gripper 103 can expand outwards to engage with an inner wall of the outer housing 203, such that the gripper 103 can be clamped in a target sliding sleeve and engage with the target sliding sleeve to be locked at the valve core 205.
An annular groove is formed in a surface of the outer housing 101. The annular groove is located on a right side of the mounting slot, the sealing cylinder 106 is mounted in the annular groove, and the pressing sleeve 105 is arranged on a left side of the sealing cylinder 106. The pressing sleeve 105 is connected with the execution module 104 inside the outer housing 101. When being driven by the execution module 104, the pressing sleeve 105 can move 30) rightwards inside the mounting slot formed in the outer housing 101 as shown in
The detection module 107 is arranged in the outer housing 101 to identify the identification module 202 in the fracturing sliding sleeve and determines whether the identification module 202 is in a target opening stage.
A driving force of the execution module 104 can be a high gas pressure produced by a detonation of gunpowder, a linear pushing force provided by an electric push rod, or an expansion force provided by a motor torque.
The smart label as a whole is made of soluble material such as magnesium aluminum alloy, which can be completely dissolved in a certain period of time by being immersed in fracturing fluid containing salt solution.
The smart label 1 is placed into the casing 4 through a wellhead, and is driven to move forwards in a wellbore by pumping. The smart label 1 automatically identifies the fracturing sliding sleeve of a target stage and is clamped and seated in the fracturing sliding sleeve of the target stage. The smart label 1 applies pressure to the fracturing sliding sleeve of the target stage by a pump truck to open the fracturing sliding sleeve, and thus the fracturing sliding sleeve is fractured level by level from the bottom to the top. The opening of the fracturing sliding sleeve of each stage corresponds to one smart label 1. From the back to the front, the opening and fracturing of the fracturing sliding sleeve of each stage are completed level by level through repeated placement of smart labels and fracturing operations. After all the stages are fractured, the smart label is completely dissolved by being immersed in the fracturing fluid, and there is no metal fragment residue in the wellbore, which does not cause damage to the production tools in the subsequent wellbore.
The smart label 1 is initially in the state shown in the left side of
In the fracturing sliding sleeve 2, the upper connector 201 and the lower connector 208 are respectively arranged on a left end and a right end of the outer housing 203. The fracturing sliding sleeve 2 is connected to an upper part of the casing 4 through the upper connector 201, and is connected to a lower part of the casing 4 through the lower connector 208.
The valve core 205 is mounted inside the outer housing 203. As shown in
The identification module 202 is mounted inside the outer housing 203 and is adjacent to the upper connector 201. The identification module 202 indicates an address of the fracturing sliding sleeve of the current stage. When the smart label 1 determines that the identification module 202 of the current fracturing sliding sleeve is in the target opening stage through the detection module 107, the smart label 1 is clamped and seated at the valve core 205 of the fracturing sliding sleeve 2, which is as shown in
The clamping mechanism 206 is arranged on the valve core 205. When the fracturing sliding sleeve 2 is opened in place, the clamping mechanism 206 is clamped to the limiting slot 207 arranged in one side of the upper connector 201 adjacent to the lower connector 208, thus, the fracturing sliding sleeve 2 is locked in the open state as shown in
The fracturing sliding sleeve moves into the wellbore with the casing 4 and cementing is performed, and each fracturing sliding sleeve corresponds to a target fracturing stage in the well.
An implementation method of the full-bore indefinite-level staged fracturing sliding sleeve includes steps as follows.
Step S1, setting a stage number of the fracturing sliding sleeve 2; after the fracturing sliding sleeve and a last toe-end sliding sleeve 3 enter the wellbore with the casing 4 and the cementing is performed, applying pressure through a pumper at the wellhead to open the toe-end sliding sleeve 3, and thus building a pumping delivery channel. That is, the outer housing 203 enters the wellhead with the casing 4, and the number and position of the outer housing 203 correspond to the number and position of each fracturing stage in the well.
Step S2, as shown in
Step S3, the smart label being clamped and seated in first fracturing stage, the smart label 1 applying pressure to the first fracturing stage through the pumper at the wellhead to fracture the first fracturing stage; that is, when it is determined that the current fracturing sliding sleeve corresponds to the target fracturing stage, the gripper 103 extends out and the sealing cylinder 106 expands, and the smart label 1 drives the valve core 205 to move rightwards under the action of pumping pressure to open the sandblasting port 204, thus the target fracturing stage is opened.
Step S4, as shown in
Step S5, as shown in
The fracturing sliding sleeve has the technical characteristics of large bore, full bore and indefinite level. The opening control of the fracturing sliding sleeve in the target fracturing stage can be realized by pumping the smart label 1 through the wellhead, without electric seating tool or coiled tubing operation, and the smart label can be completely dissolved without grinding or fishing after the fracturing is completed, which meets the needs of multi-stage and large-scale fracturing, effectively improves the efficiency of fracturing construction, greatly reduces the cost of fracturing construction, and provides a strong technical support for increasing the transformation effect and large-scale effective use of oil and gas reservoirs. The full-bore indefinite-level staged fracturing sleeve 2 applied in this application has the characteristics of full bore, which can realize the staged fracturing in any length horizontal section with any stage number. The fracturing sliding sleeve of each stage can be uniquely positioned through the built-in identification module 202.
The above descriptions are only optional embodiments of the application, and do not limit the scope of the patents of the present application. All the equivalent structural transformations made by the content of the specification and drawings of the present application under the creative concept of the present application, or directly/indirectly used in other related technical fields are all included in the protection scope of the patents of the present application.
| Number | Name | Date | Kind |
|---|---|---|---|
| 11808124 | Shetty | Nov 2023 | B1 |
| 20130168099 | Themig | Jul 2013 | A1 |
| 20150218923 | Hallundbæk | Aug 2015 | A1 |
| 20160251923 | Keerthivasan | Sep 2016 | A1 |
| Number | Date | Country |
|---|---|---|
| 105822278 | Oct 2018 | CN |
| 110593837 | May 2020 | CN |
| 113404477 | Sep 2021 | CN |
| 113356794 | Dec 2021 | CN |
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2023/090719 | Apr 2023 | WO |
| Child | 18384834 | US |
