Well cementation fracturing electronic sliding sleeve for magnetic induction gas explosion

Abstract

The utility model discloses a well cementation fracturing electronic sliding sleeve for magnetic induction gas explosion. The well cementation fracturing electronic sliding sleeve comprises a magnetic ring short section, a well cementation sliding sleeve body and an inductor. The well cementation sliding sleeve comprises an outer sliding sleeve body and an inner piston sleeve body, the inner piston sleeve body is arranged in the outer sliding sleeve body in a sleeved mode, a fracturing hole is formed in the outer sliding sleeve body, and the well cementation sliding sleeve body is connected with the magnetic ring short section. The inductor comprises a piston rod, a driving bin and an igniter, the piston rod and the driving bin are adjacently arranged in the outer sliding sleeve, and the igniter is used for igniting combustible gas in the driving bin and driving the piston rod to continuously move downwards. The piston rod, the driving bin and the igniter are arranged, combustible gas in the driving bin is ignited through the igniter, stronger thrust is provided, and a channel is opened more smoothly and completely.

Description

Technical Field

[0001] The utility model relates to the technical field of completion tools, and particularly relates to a cementing fracturing electronic sliding sleeve with magnetic induction gas explosion. Background Art

[0002] With the exploration and development of oil and gas reservoir resources gradually turning to unconventional oil and gas reservoirs such as shale oil, shale gas, and tight sandstone oil, the conventional open-hole staged fracturing completion technology is no longer applicable to the stimulation and transformation of unconventional oil and gas reservoirs with complex interbedded lithologies due to problems such as poor wellbore stability, high completion risk, and limited number of stages. After cementing, the cementing sliding sleeve staged fracturing completion technology has good wellbore stability, can perform targeted fracturing on the reservoir, has strong transformation pertinence, reliable operation, and low well control risk, and has gradually become an important means for improving the quality and efficiency and high-efficiency development of unconventional oil and gas reservoirs. As a key tool for cementing sliding sleeve staged fracturing, in-depth research has been carried out on cementing sliding sleeves at home and abroad, and a cementing sliding sleeve staged fracturing completion technology mainly based on cementing fracturing sliding sleeves, toe-end sliding sleeves, and ball seat sliding sleeves has been formed. Due to the requirements of the completion process, the opening pressure of the toe-end sliding sleeve needs to exceed the maximum construction pressure. Therefore, during on-site use, the fracturing effect is prone to be poor due to insufficient opening pressure; due to the limitations of the tool structure and implementation process of the ball seat sliding sleeve, the ball seats of the fracturing sliding sleeves of each layer need to be gradually reduced in diameter from top to bottom, and full-bore fracturing cannot be achieved, which limits the fracturing construction displacement and the number of stages, and there is also insufficient pressure, resulting in insufficient opening of the fracturing channels; as a relatively advanced electronically controlled hydraulic fracturing sliding sleeve, it relies on the internal motor of the tool or is combined with an internal hydraulic source to drive the opening of the fracturing channel. While solving the problems of full-bore and infinite stages, there are also limitations in the switching power. Under the conditions of large downhole pressure differences or sticking, it is easy to have problems with the inability to open the fracturing channel.

[0003] The utility model patent of the comparative document CN204851170U discloses an oil and gas well cementing staged fracturing ball-throwing sliding sleeve, which constructs a basic sliding sleeve structure by setting an outer casing, a movable sliding sleeve, a central pipe, a tail pipe, and a ball seat; specifically, the purpose of multi-layer staged fracturing is achieved by gradually opening the sliding sleeve through the ball-throwing method of multiple ball-throwing sliding sleeves, without tools such as hangers and open-hole packers.

[0004] However, the above-mentioned oil and gas well cementing staged fracturing ball-throwing sliding sleeve still faces the problems of limited opening pressure of the fracturing channel and difficulty in achieving full-bore fracturing, that is, there may be a situation where the power is insufficient to open the fracturing channel. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the above technical deficiencies and propose a cementing fracturing electronic sliding sleeve with magnetic induction gas explosion to solve the technical problem of insufficient power to open the fracturing channel in the prior art.

[0006] To achieve the above technical objectives, the present utility model adopts the following technical solutions:

[0007] The present utility model provides a cementing and fracturing electronic sliding sleeve with magnetic induction gas explosion, including a magnetic ring short joint, a cementing sliding sleeve, and an inductor; the cementing sliding sleeve includes an outer sliding sleeve and an inner piston sleeve, the inner piston sleeve is arranged inside the outer sliding sleeve, a fracturing hole is formed on the outer sliding sleeve, and the cementing sliding sleeve is connected to the magnetic ring short joint; the inductor includes a piston rod, a driving chamber, and an igniter, the piston rod and the driving chamber are adjacent and arranged inside the outer sliding sleeve, and the igniter is used to ignite the combustible gas inside the driving chamber and drive the piston rod to continuously move downward.

[0008] In some embodiments, the inductor further includes a cone and a slip, the cone is located on the side of the piston rod away from the driving chamber, and the cone is threadedly connected to the piston rod, and the outside of the cone abuts against the slip.

[0009] In some embodiments, the inductor further includes an upper joint and a ball seat, the upper joint is sleeved outside the cone, and the ball seat is arranged inside the upper joint and threadedly connected to the upper joint.

[0010] In some embodiments, the inductor further includes a body, a cavity is arranged inside the body, the piston rod, the driving chamber, and the igniter are all arranged inside the cavity, a battery chamber is arranged on the side of the driving chamber away from the piston rod, and the battery chamber is used to load a battery.

[0011] In some embodiments, the inner wall of the cavity and the slip are connected by a dovetail groove.

[0012] In some embodiments, the piston rod is of a T-shaped structure.

[0013] In some embodiments, one end of the igniter extends into the driving chamber.

[0014] In some embodiments, the fracturing holes are evenly distributed along the circumferential direction of the outer sliding sleeve.

[0015] In some embodiments, the magnetic ring short joint includes a first joint, a magnetic ring, and a second joint, the first joint and the second joint are fixedly connected by screws, and the magnetic ring is embedded at the joint of the first joint and the second joint.

[0016] In some embodiments, the second joint is threadedly connected to one end of the cementing sliding sleeve.

[0017] Compared with the prior art, a cementing fracturing electronic sliding sleeve with magnetic induction gas explosion provided by the utility model constructs a basic boosting structure by setting a piston rod, a driving chamber and an igniter; specifically, the igniter is used to ignite the combustible gas located in the driving chamber, and the energy generated by the gas explosion is converted into the thrust of the piston rod, effectively improving the smoothness of opening the fracturing channel and boosting the full opening of the fracturing channel. Description of the Drawings

[0018] Figure 1 is a structural cross-sectional view of a magnetic ring short section of a cementing fracturing electronic sliding sleeve with magnetic induction gas explosion provided by an embodiment of the utility model;

[0019] Figure 2 is a structural cross-sectional view of a cementing sliding sleeve of a cementing fracturing electronic sliding sleeve with magnetic induction gas explosion provided by an embodiment of the utility model;

[0020] Figure 3 is a structural cross-sectional view of an inductor of a cementing fracturing electronic sliding sleeve with magnetic induction gas explosion provided by an embodiment of the utility model;

[0021] Description of the Reference Numerals:

[0022] 100, magnetic ring short section; 110, first joint; 120, magnetic ring; 130, second joint; 200, cementing sliding sleeve; 210, outer sliding sleeve; 211, fracturing hole; 220, inner piston sleeve; 300, inductor; 310, piston rod; 320, driving chamber; 330, igniter; 340, cone; 350, slip; 360, upper joint; 370, ball seat; 380, body; 390, cavity; 400, battery compartment. Detailed Embodiments

[0023] In order to make the objectives, technical solutions and advantages of the utility model clearer, the following further describes the utility model in detail with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0024] To solve the technical problem of insufficient power to open the fracturing channel, the utility model provides a cementing fracturing electronic sliding sleeve with magnetic induction gas explosion, which can achieve boosting power and opening the fracturing channel.

[0025] It should be noted that the cementing fracturing electronic sliding sleeve with magnetic induction gas explosion described in the utility model is used for but not limited to downhole operations of oil wells, etc. For the convenience of description, in the utility model, only an example of a cementing fracturing electronic sliding sleeve with magnetic induction gas explosion applied to downhole operations of oil wells is used for illustration, and the principle of a cementing fracturing electronic sliding sleeve with magnetic induction gas explosion applied to other types of equipment is substantially the same as that applied to downhole operations of oil wells, and will not be elaborated herein one by one.

[0026] Please refer to Figure 1 - Figure 3 wherein Figure 2 is a structural cross-sectional view of a cementing fracturing electronic sliding sleeve with magnetic induction air explosion in an embodiment of the present utility model. A cementing fracturing electronic sliding sleeve with magnetic induction air explosion includes a magnetic ring short section 100, a cementing sliding sleeve 200, and an inductor 300; the cementing sliding sleeve 200 includes an outer sliding sleeve 210 and an inner piston sleeve 220, the inner piston sleeve 220 is arranged inside the outer sliding sleeve 210, a fracturing hole 211 is formed on the outer sliding sleeve 210, and the cementing sliding sleeve 200 is connected to the magnetic ring short section 100; the inductor 300 includes a piston rod 310, a driving chamber 320, and an igniter 330, the piston rod 310 and the driving chamber 320 are adjacently arranged inside the outer sliding sleeve 210, and the igniter 330 is used to ignite the combustible gas in the driving chamber 320 and drive the piston rod 310 to continuously move downward.

[0027] In this embodiment, a basic boosting structure is constructed by arranging the piston rod 310, the driving chamber 320, and the igniter 330 inside the outer sliding sleeve 210; specifically, by controlling the ignition of the igniter 330, the combustible gas in the driving chamber 320 generates an air explosion, and the energy generated by the air explosion is converted into the thrust to assist the piston rod 310, thereby effectively improving the smoothness of the opening of the fracturing channel and boosting the complete opening of the fracturing channel.

[0028] In one of the embodiments, please refer to Figure 3 wherein the inductor 300 further includes a cone 340 and a slip 350, the cone 340 is located on the side of the piston rod 310 away from the driving chamber 320, and the cone 340 is threadedly connected to the piston rod 310, and the outer side of the cone 340 abuts against the slip 350.

[0029] In one of the embodiments, please refer to Figure 3 wherein the inductor 300 further includes an upper joint 360 and a ball seat 370, the upper joint 360 is sleeved on the outer side of the cone 340, and the ball seat 370 is arranged inside the upper joint 360 and is threadedly connected to the upper joint 360.

[0030] In this embodiment, specifically, a soluble ball enters the ball seat 370 to achieve ball sealing of the inductor 300 and block the inner channel of the pipe string; when the liquid returns from the well bottom, the liquid passes through the channel inside the inductor 300, pushes open the soluble ball, and the backflow channel of the inductor 300 is opened to form an oil production channel.

[0031] In one of the embodiments, please refer to Figure 3, the inductor 300 further includes a body 380, a cavity 390 is provided inside the body 380, the piston rod 310, the driving chamber 320 and the igniter 330 are all arranged inside the cavity 390, and a battery chamber 400 is provided on one side of the driving chamber 320 away from the piston rod 310, and the battery chamber 400 is used for loading batteries.

[0032] In this embodiment, the body 380 is preferably made of a soluble material such as magnesium alloy, which is convenient for complete dissolution under the infiltration of acid solution.

[0033] In one of the embodiments, please refer to Figure 3 , the inner wall of the cavity 390 and the slip 350 are connected by a dovetail groove.

[0034] In this embodiment, the inner wall of the cavity 390 and the slip 350 are connected by a dovetail groove, which facilitates the slip 350 to contract and expand more freely.

[0035] In one of the embodiments, please refer to Figure 3 , the piston rod 310 has a T-shaped structure.

[0036] In this embodiment, the T-shaped structure of the piston rod 310 facilitates plugging and connecting other specific structures.

[0037] In one of the embodiments, please refer to Figure 3 , one end of the igniter 330 extends into the driving chamber 320.

[0038] In this embodiment, one end of the igniter 330 extends into the driving chamber 320, which facilitates more rapid ignition and ignition.

[0039] In one of the embodiments, please refer to Figure 2 , the fracturing holes 211 are uniformly distributed along the circumferential direction of the outer sliding sleeve 210 ( Figure 2 only some of the fracturing holes 211 are shown).

[0040] In one of the embodiments, please refer to Figure 1 , the magnetic ring sub-section 100 includes a first joint 110, a magnetic ring 120 and a second joint 130. The first joint 110 and the second joint 130 are fixedly connected by screws, and the magnetic ring 120 is embedded at the joint of the first joint 110 and the second joint 130.

[0041] In this embodiment, the magnetic ring 120 is embedded at the joint of the first joint 110 and the second joint 130, which can prevent the displacement of the magnetic ring 120.

[0042] In one of the embodiments, please refer to Figure 1 、 Figure 2 , the second joint 130 is threadedly connected to one end of the cementing sleeve 200.

[0043] To better understand the present utility model, the following is a detailed description of the technical solution of the present utility model in conjunction with Figures 1 to 3 :

[0044] First, during the staged fracturing operation, the cementing sliding sleeve 200 and the magnetic ring nipple 100 are run in once to achieve a one-to-one correspondence between the cementing fracturing electronic sliding sleeve and the target fracturing interval. Then, during the placement of the body 380, after the body 380 first passes through the magnetic ring nipple 100 and receives the signal emitted by the magnetic ring 120, the internal circuit board of the inductor 300 controls the igniter 330 to detonate the combustible gas in the driving chamber 320. The energy generated by the gas explosion is converted into the thrust of the piston rod 310. This thrust causes the piston rod 310 to continuously move downward and drives the slips 350 to open. Then, after continuous pumping pressure, the shear pins between the inner piston sleeve 220 and the outer sliding sleeve 210 are cut off, and the inner piston sleeve 220 moves along the inner wall of the outer sliding sleeve 210, completely exposing the fracturing holes 211, realizing the communication between the inner and outer spaces of the cementing sliding sleeve 200, and finally achieving full-bore fracturing with the fracturing displacement being unrestricted. Since the thrust generated by the gas explosion boosts the movement of the slips 350, the power is effectively enhanced, making the opening of the fracturing channel smoother and more complete. It should be noted that the injection of the combustible gas is pre-injected and can be achieved through a dedicated channel without affecting normal use.

[0045] The above specific embodiments of the present utility model do not constitute a limitation to the protection scope of the present utility model. Any other corresponding changes and deformations made according to the technical concept of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A magnetic gas explosion cementing and fracturing electronic sliding sleeve, characterized in that: include: Magnetic ring nipple; A cementing sleeve, the cementing sleeve comprises an outer sleeve and an inner piston sleeve, the inner piston sleeve is arranged in the outer sleeve, a fracturing hole is opened on the outer sleeve, and the cementing sleeve is connected to the magnetic ring nipple; as well as The sensor comprises a piston rod, a driving chamber and an igniter. The piston rod is arranged adjacent to the driving chamber in the outer sleeve. The igniter is used to ignite the combustible gas in the driving chamber and drive the piston rod to move continuously downward.

2. The magnetic gas explosion cementing and fracturing electronic sliding sleeve according to claim 1, characterized in that: The sensor further comprises a cone and a slip. The cone is located on a side of the piston rod away from the driving chamber, and the cone is threadedly connected to the piston rod. The outer side of the cone abuts against the slip.

3. The magnetic gas explosion cementing and fracturing electronic sliding sleeve according to claim 2, characterized in that: The sensor also includes an upper joint and a ball seat. The upper joint is sleeved on the outer side of the cone, and the ball seat is arranged in the upper joint and is threadedly connected to the upper joint.

4. The magnetic gas explosion cementing and fracturing electronic sliding sleeve according to claim 2, characterized in that: The sensor also includes a body, a cavity is provided in the body, the piston rod, the drive compartment and the igniter are all arranged in the cavity, and a battery compartment is provided on a side of the drive compartment away from the piston rod, and the battery compartment is used to load batteries.

5. The magnetic gas explosion cementing and fracturing electronic sliding sleeve according to claim 4, characterized in that: The inner wall of the cavity is connected to the slips via a dovetail groove.

6. The magnetic gas explosion cementing and fracturing electronic sliding sleeve according to claim 1, characterized in that: The piston rod is a T-shaped structure.

7. The magnetic gas explosion cementing and fracturing electronic sliding sleeve according to claim 1, characterized in that: One end of the igniter extends into the driving compartment.

8. The magnetic gas explosion cementing and fracturing electronic sliding sleeve according to claim 1, characterized in that: The fracturing holes are evenly distributed along the circumference of the outer sliding sleeve.

9. The magnetic induction gas explosion cementing and fracturing electronic sliding sleeve according to claim 1, characterized in that: The magnetic ring short section includes a first joint, a magnetic ring and a second joint. The first joint and the second joint are fixedly connected by screws, and the magnetic ring is embedded in the joint between the first joint and the second joint.

10. The magnetic gas explosion cementing and fracturing electronic sliding sleeve according to claim 9, characterized in that: The second joint is threadedly connected to one end of the cementing sleeve.

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