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Bridge plug with sand production prevention function for fracturing and using method thereof

A fracturing and functional technology, applied in the field of bridge plugs for fracturing, can solve problems such as blockage, erosion damage of gas pipelines, etc.

Active Publication Date: 2020-08-25
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a bridge plug for fracturing with the function of preventing sand production and its use method, which solves the problem of the return of solid matter on the wellhead and oil and gas pipelines. The high-speed erosion damage and the blockage of the inner diameter of the bridge plug by the returned solid matter have realized the bridge plug that can prevent blockage

Method used

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  • Bridge plug with sand production prevention function for fracturing and using method thereof
  • Bridge plug with sand production prevention function for fracturing and using method thereof
  • Bridge plug with sand production prevention function for fracturing and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Referring to Fig. 1, it is a structural schematic diagram of Embodiment 1 of the present invention, a bridge plug for fracturing with the function of preventing sand production, including: a central tube 1, a setting push cylinder 6, a base 3, a ball seat 4, and a sealant Cylinder 5, setting cylinder 2, locking part and explosives 7, the center tube 1 is in order from bottom to top seat cover base 3, locking part, setting push cylinder 6, sealing rubber cylinder 5, ball seat 4, seating The sealing cylinder 2 and the explosive 7, the explosive 7, the setting cylinder 2, the ball seat 4, and the sealing rubber cylinder 5 are in contact with each other, and the lower end of the setting push cylinder 6 is in contact with the locking part and is located in the locking part, so The top end of the setting push cylinder 6 is located in the sealing rubber cylinder 5, and the explosive 7, the setting cylinder 2, the ball seat 4, the sealing rubber cylinder 5 and the inner peripher...

Embodiment 2

[0033] Referring to Fig. 1, compared with Embodiment 1, the difference of this embodiment is that: there are shear studs 8 fixedly connected between the base 3 and the central pipe 1, and there are at least two pairs of shear studs 8, and at least two The pair of shear studs 8 are evenly distributed between the base 3 and the central tube 1 .

[0034] In actual use: while the setting cylinder 2 pushes the slips 11 to move outward, the base 3 is moved down by the impact force, so that the shear nail 8 between the center tube 1 and the base 3 is broken, and the center tube 1 is separated from the base 3 .

Embodiment 3

[0036] Referring to Fig. 1, compared with Embodiment 2, the difference of this embodiment is that: the lower surface of the base 3 is fixed with a sand control net 9, and the bottom end of the central pipe 1 is located in the sand control net 9.

[0037] In actual use: After the fracturing of the upper section of the soluble fracturing plugging ball is completed, the gaseous or liquid fluid in the formation carries solid proppant or formation filling and enters the wellbore. When it flows to the position of the sand control net 9, the solid The material is blocked by the sand control net 9 and cannot flow to the wellhead.

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Abstract

The invention relates to the field of downhole pressure dividing tools for fracturing oil and gas fields, and particularly relates to a bridge plug with a sand production prevention function for fracturing and a using method thereof. The bridge plug comprises a center pipe, a seat sealing push cylinder, a base, a ball seat, a sealing rubber cylinder, a seat sealing cylinder, a locking part and anexplosive, wherein the outside of the center pipe is sequentially sleeved with the base, the locking part, the seat sealing push cylinder, the sealing rubber cylinder, the ball seat, the seat sealingcylinder and the explosive from bottom to top, the explosive, the seat sealing cylinder, the ball seat and the sealing rubber cylinder are in contact with each other, the lower end of the seat sealingpush cylinder is in contact with the locking part and is located in the locking part, the top end of the seat sealing push cylinder is located in the sealing rubber cylinder, and the inner circumferential surfaces of the explosive, the seat sealing cylinder, the ball seat, the sealing rubber cylinder and the seat sealing push cylinder are in clearance fit with the center pipe. According to the bridge plug, the problems of high-speed erosion damage of returned solid substance to a wellhead, an oil extraction pipeline and a gas pipeline and blockage of the inner diameter of a bridge plug by thereturned solid substance and the like are effectively solved, and the bridge plug capable of preventing blockage is achieved.

Description

technical field [0001] The invention relates to the field of downhole pressure dividing tools for fracturing in oil and gas fields, in particular to a bridge plug for fracturing with the function of preventing sand production and a use method thereof. Background technique [0002] The single well production of tight oil and gas and shale oil and gas horizontal wells depends on the volume of the reservoir stimulation. The application proportion of the fracturing process is gradually increasing. This process is the main technology for the development of horizontal wells in unconventional oil and gas reservoirs in North America, with an application rate of more than 80%. key technologies. [0003] At present, the application rate of the bridge plug multi-stage fracturing process is as high as 80%. Its main working method is that the bridge plug is lowered to the predetermined position by the cable and then set by the setting tool. After the setting is completed, the target lay...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/134E21B43/08
CPCE21B33/134E21B43/08
Inventor 何明舫李宪文赵振峰马旭张燕明陈宝春马占国胡阳明毕曼梁凌云
Owner PETROCHINA CO LTD
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