Well cementation fracturing electronic sliding sleeve for magnetic induction gas explosion

Abstract

The invention 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 invention relates to the technical field of well completion tools, and in particular to a magnetically induced gas explosion cementing and fracturing electronic sliding sleeve. Background Art

[0002] As the exploration and development of oil and gas reservoir resources gradually shifts 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 suitable for the production increase transformation of unconventional oil and gas reservoirs with complex lithology due to problems such as poor wellbore stability, high completion risk and limited staged levels. However, the cementing sleeve staged fracturing completion technology has good wellbore stability after cementing, and can perform fixed-point fracturing on the reservoir. It has strong targeted transformation, reliable operation and low well control risk. It has gradually become an important means to improve the quality and efficiency of unconventional oil and gas reservoirs and develop them efficiently. As a key tool for cementing sleeve staged fracturing, cementing sleeves have been deeply studied at home and abroad, forming cementing sleeve staged fracturing completion technology mainly based on cementing fracturing sleeves, toe sleeves and ball seat sleeves. Due to the completion process requirements, the opening pressure of the toe sleeve needs to exceed the maximum construction pressure. Therefore, during on-site use, insufficient opening pressure may easily lead to poor fracturing effect. Due to the tool structure and implementation process limitations, the ball seat sleeve of the fracturing sleeve in each layer from top to bottom needs to be gradually reduced in diameter, and full-bore fracturing cannot be achieved, thereby limiting the displacement and number of stages of fracturing construction, and there is insufficient pressure, which leads to insufficient opening of the fracturing channel. As a relatively advanced technology, the electrically controlled liquid-driven fracturing sleeve relies on the internal motor drive of the tool or combines with the built-in hydraulic source drive to open the fracturing channel. While solving the full-bore and unlimited-stage problems, it also has the problem of limited switching power. Under the conditions of large pressure difference or jamming in the well, the fracturing channel is prone to failure to open.

[0003] The invention patent of the comparative document CN204851170U publicly authorized a ball-throwing sleeve for segmented fracturing of oil and gas well cementing, which constructs a basic sleeve structure by setting an outer shell, a movable sleeve, a center pipe, a tail pipe and a ball seat; specifically, the purpose of multi-layer segmented fracturing is achieved by gradually opening the sleeves through the ball throwing method of multiple ball-throwing sleeves, without the need for tools such as hangers and open hole packers.

[0004] However, the above-mentioned oil and gas well cementing staged fracturing ball sleeve still faces the problem 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 not enough to open the fracturing channel. Summary of the invention

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

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: The present invention provides a magnetically induced gas explosion cementing and fracturing electronic sleeve, comprising a magnetic ring short section, a cementing sleeve and a sensor; 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 short section; the sensor comprises a piston rod, a drive chamber and an igniter, the piston rod is arranged in the outer sleeve adjacent to the drive chamber, and the igniter is used to ignite the combustible gas in the drive chamber and drive the piston rod to move continuously downward.

[0007] In some embodiments, the sensor further includes a cone and a slip, wherein the cone is located on a side of the piston rod away from the drive chamber, and the cone is threadedly connected to the piston rod, and an outer side of the cone abuts against the slip.

[0008] In some embodiments, the sensor further includes an upper joint and a ball seat, wherein the upper joint is sleeved on the outer side of the cone, and the ball seat is disposed inside the upper joint and threadedly connected to the upper joint.

[0009] In some embodiments, the sensor also includes a body, a cavity is defined in the body, the piston rod, the drive compartment and the igniter are all disposed in the cavity, a battery compartment is defined on a side of the drive compartment away from the piston rod, and the battery compartment is used to load batteries.

[0010] In some embodiments, the inner wall of the cavity is connected to the slip by a dovetail groove.

[0011] In some embodiments, the piston rod is a T-shaped structure.

[0012] In some embodiments, one end of the igniter extends into the drive compartment.

[0013] In some embodiments, the fracturing holes are evenly distributed along the circumference of the outer sleeve.

[0014] In some embodiments, 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.

[0015] In some embodiments, the second joint is threadedly connected to one end of the cementing sleeve.

[0016] Compared with the prior art, the present invention provides a magnetic gas explosion cementing fracturing electronic sleeve, which 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 in the driving chamber, and the energy generated by the gas explosion is converted into the thrust of the piston rod, which effectively improves the smoothness of the opening of the fracturing channel and promotes the complete opening of the fracturing channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural cross-sectional view of a magnetic ring short section of a magnetically induced gas explosion cementing and fracturing electronic sliding sleeve provided by an embodiment of the present invention; Figure 2 It is a structural cross-sectional view of a cementing sleeve of a magnetic gas explosion cementing and fracturing electronic sleeve provided by an embodiment of the present invention; Figure 3 It is a structural cross-sectional view of a sensor of a magnetic gas explosion cementing and fracturing electronic sliding sleeve provided by an embodiment of the present invention; Description of reference numerals: 100, magnetic ring short joint; 110, first joint; 120, magnetic ring; 130, second joint; 200, cementing sleeve; 210, outer sleeve; 211, fracturing hole; 220, inner piston sleeve; 300, sensor; 310, piston rod; 320, drive chamber; 330, igniter; 340, cone; 350, slip; 360, upper joint; 370, ball seat; 380, body; 390, cavity; 400, battery compartment. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] In order to solve the technical problem that the power is not enough to open the fracturing channel, the present invention provides a magnetic gas explosion cementing fracturing electronic sliding sleeve, which can increase the power and open the fracturing channel.

[0020] It should be noted that the magnetic-induction gas explosion cementing and fracturing electronic sleeve described in the present invention is used for but not limited to downhole operations in oil wells. For the convenience of explanation, in the present invention, only the application of a magnetic-induction gas explosion cementing and fracturing electronic sleeve in downhole operations in oil wells is used as an example for explanation. The principle of applying a magnetic-induction gas explosion cementing and fracturing electronic sleeve to other types of equipment is essentially the same as the principle applied to downhole operations in oil wells, which will not be repeated here.

[0021] See also Figure 1 - Figure 3 ,in Figure 2The present invention is a cross-sectional view of the structure of a magnetic gas explosion cementing and fracturing electronic sleeve in one embodiment of the present invention. The magnetic gas explosion cementing and fracturing electronic sleeve comprises a magnetic ring short section 100, a cementing sleeve 200 and a sensor 300; the cementing sleeve 200 comprises an outer sleeve 210 and an inner piston sleeve 220, the inner piston sleeve 220 is arranged in the outer sleeve 210, a fracturing hole 211 is opened on the outer sleeve 210, and the cementing sleeve 200 is connected to the magnetic ring short section 100; the sensor 300 comprises a piston rod 310, a drive chamber 320 and an igniter 330, the piston rod 310 and the drive chamber 320 are adjacently arranged in the outer sleeve 210, and the igniter 330 is used to ignite the combustible gas in the drive chamber 320 and drive the piston rod 310 to move continuously downward.

[0022] In this embodiment, a basic boosting structure is constructed by arranging a piston rod 310, a drive chamber 320 and an igniter 330 in the outer sleeve 210; specifically, by controlling the ignition of the igniter 330, a gas explosion occurs in the combustible gas in the drive chamber 320, and the energy generated by the gas explosion is converted into a thrust to assist the piston rod 310, thereby effectively improving the smoothness of the opening of the fracturing channel and promoting the complete opening of the fracturing channel.

[0023] In one embodiment, see Figure 3 The sensor 300 further includes a cone 340 and a slip 350 . The cone 340 is located on a side of the piston rod 310 away from the driving chamber 320 . The cone 340 is threadedly connected to the piston rod 310 , and the outer side of the cone 340 abuts against the slip 350 .

[0024] In one embodiment, see Figure 3 The sensor 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 . The ball seat 370 is disposed inside the upper joint 360 and is threadedly connected to the upper joint 360 .

[0025] In this embodiment, specifically, the soluble ball enters the ball seat 370 to achieve ball sealing for the sensor 300, blocking the inner channel of the pipe string; when the liquid returns from the bottom of the well, the liquid passes through the channel inside the sensor 300, pushes open the soluble ball, and the return channel of the sensor 300 is opened to form an oil production channel.

[0026] In one embodiment, see Figure 3 The sensor 300 also includes a body 380, in which a cavity 390 is provided. The piston rod 310, the driving compartment 320 and the igniter 330 are all arranged in the cavity 390. A battery compartment 400 is provided on the side of the driving compartment 320 away from the piston rod 310, and the battery compartment 400 is used to load batteries.

[0027] In this embodiment, the main body 380 is preferably made of a soluble material such as magnesium-aluminum alloy, so as to be completely dissolved under the infiltration of acid solution.

[0028] In one embodiment, see Figure 3 The inner wall of the cavity 390 is connected to the slip 350 by a dovetail groove.

[0029] In this embodiment, the inner wall of the cavity 390 and the slip 350 are connected by a dovetail groove, which makes it easier for the slip 350 to contract and open.

[0030] In one embodiment, see Figure 3 , the piston rod 310 is a T-shaped structure.

[0031] In this embodiment, the piston rod 310 is a T-shaped structure to facilitate blocking and connecting other specific structures.

[0032] In one embodiment, see Figure 3 One end of the igniter 330 extends into the drive compartment 320 .

[0033] In this embodiment, one end of the igniter 330 extends into the driving compartment 320 to facilitate faster ignition.

[0034] In one embodiment, see Figure 2 The fracturing holes 211 are evenly distributed along the circumference of the outer sleeve 210 ( Figure 2 Only a portion of the fracturing hole 211 is shown).

[0035] In one embodiment, see Figure 1 The magnetic ring short 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 in the joint between the first joint 110 and the second joint 130 .

[0036] In this embodiment, the magnetic ring 120 is embedded in the joint between the first connector 110 and the second connector 130 to prevent the magnetic ring 120 from shifting.

[0037] In one embodiment, see Figure 1 , Figure 2 The second joint 130 is threadedly connected to one end of the cementing sleeve 200 .

[0038] In order to better understand the present invention, the following Figures 1 to 3 The technical solution of the present invention is described in detail: First, when performing staged fracturing operations, the cementing sleeve 200 and the magnetic ring short section 100 are lowered at one time to achieve a one-to-one correspondence between the cementing fracturing electronic sleeve and the target fracturing layer section; then, during the process of placing the main body 380, the main body 380 first passes through the magnetic ring short section 100 and receives the signal sent by the magnetic ring 120, and the internal circuit board of the sensor 300 controls the igniter 330 to detonate the combustible gas in the drive chamber 320, and the energy generated by the gas explosion will be converted into the thrust of the piston rod 310, which will cause the piston rod 310 to continue to move downward and drive the slip 350 to open; then, after continuous pumping, the shear pins between the inner piston sleeve 220 and the outer sleeve 210 will be sheared off, and the inner piston sleeve 220 will move along the inner wall of the outer sleeve 210, completely exposing the fracturing hole 211, realizing the connection between the inner and outer spaces of the cementing sleeve 200, and finally achieving full-bore fracturing, and the fracturing displacement is not limited. The thrust generated by the gas explosion boosts the movement of the Slip 350, thereby effectively increasing the power and making the fracturing channel open more smoothly and completely. It should be pointed out that the injection of combustible gas is pre-injected and can be achieved through a dedicated channel without affecting normal use.

[0039] The above specific implementations of the present invention do not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A magnetic gas explosion cementing and fracturing electronic sliding sleeve, It is 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. According to claim 1, a magnetic gas explosion cementing and fracturing electronic sliding sleeve, It is 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 induction gas explosion cementing and fracturing electronic sliding sleeve according to claim 2, It is 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, It is 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, It is characterized in that The inner wall of the cavity is connected to the slips via a dovetail groove.

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

7. The magnetic induction gas explosion cementing and fracturing electronic sliding sleeve according to claim 1, It is 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, It is 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, It is 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, It is characterized in that The second joint is threadedly connected to one end of the cementing sleeve.

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