Bridge plug with low pumping friction resistance for horizontal well, and using method thereof

A technology for horizontal wells and bridge plugs, which is applied in the field of downhole delamination tools for fracturing horizontal wells in oil and gas fields. The effect of improving pumping efficiency, simple structure, and reducing the risk of lowering

Inactive Publication Date: 2019-01-04
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art above, to provide a low-pump injection friction bridge plug for horizontal wells and its use method, which overcomes 1 in the prior art: the horizontal movement friction of the bridge plug is high, the bridge The speed of plug running is limited. 2: In wells with slight deformation of the casing, the irregularity of the casing will lead to the risk of running the bridge plug. 3: The fixation of the bridge plug is unstable, and the plugging is not complete, etc.

Method used

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  • Bridge plug with low pumping friction resistance for horizontal well, and using method thereof

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specific Embodiment approach

[0026] It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention Any modification of the structure, change of the proportional relationship or adjustment of the size shall still fall within the scope of the technical content disclosed in the present invention without affecting the effect and purpose of the present invention. In the range.

[0027] At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit this specification. The practicable scope of the invention and the change or adjustment of its relative relationship shall also be regarded as the practicable scope of the present inventi...

Embodiment 1

[0029] Such as figure 1 As shown, a low-pump injection friction bridge plug for horizontal wells includes a ball seat 2, a sealing rubber cylinder 3, a setting cylinder 4, a roller 5, slips 6 and a fishing base 7, wherein the lower end of the ball seat 2 is connected to The sealing rubber cylinder 3, the upper end surface of the setting cylinder 4 is socketed in the sealing rubber cylinder 3, wherein the lower end surface of the setting cylinder 4 is socketed in the slips 6, the outer wall of the setting cylinder 4 is provided with a roller 5, and the slips 6 The lower end surface is connected to the salvage base 7, wherein the center of the ball seat 2, the sealing rubber cylinder 3, the setting cylinder 4, the slips 6 and the salvage base 7 has a through hole.

Embodiment 2

[0031] Such as figure 1 As shown, a low-pump injection friction bridge plug for horizontal wells includes a ball seat 2, a sealing rubber cylinder 3, a setting cylinder 4, a roller 5, slips 6 and a fishing base 7, wherein the lower end of the ball seat 2 is connected to The sealing rubber cylinder 3, the upper end surface of the setting cylinder 4 is socketed in the sealing rubber cylinder 3, wherein the lower end surface of the setting cylinder 4 is socketed in the slips 6, the outer wall of the setting cylinder 4 is provided with a roller 5, and the slips 6 The lower end surface is connected to the salvage base 7, wherein the center of the ball seat 2, the sealing rubber cylinder 3, the setting cylinder 4, the slips 6 and the salvage base 7 has a through hole.

[0032] Such as figure 1 As shown, preferably, it also includes a center pipe 1A and a setting push cylinder 1B. In the hole, the setting push cylinder 1B is set on the upper end surface of the ball seat 2, and the ...

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Abstract

The invention discloses a bridge plug with low pumping friction resistance for a horizontal well, and a using method thereof. The bridge plug comprises a ball seat, a sealing rubber cylinder, a setting cylinder, idler wheels, a slip and a salvage base; the lower end face of the ball seat is connected with the sealing rubber cylinder; the upper end face of the setting cylinder is sleeved with the sealing rubber cylinder, and the lower end face of the setting cylinder is sleeved with the slip; the idler wheels are arranged on the outer wall of the setting cylinder; the lower end face of the slipis connected with the salvage base; and a through hole penetrates through the centers of the ball seat, the sealing rubber cylinder, the setting cylinder, the slip and the salvage base. The bridge plug is simple in structure, and an operating method is simple and convenient; through the idler wheels on the setting cylinder, moving of the bridge plug on the horizontal section is changed from large-friction-resistance transverse sliding into low-friction-resistance idler wheel rolling, thus the good effect of lowering the pumping friction resistance is achieved, and the pumping efficiency of the bridge plug can be improved; and certain passing capacity to resist casing deformation is achieved, and the risk of tripping in of the bridge plug due to casing deformation is reduced.

Description

technical field [0001] The invention relates to the technical field of downhole delamination tools for fracturing horizontal wells in oil and gas fields, in particular to a low-pump injection friction bridge plug for horizontal wells and a method for using the same. 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, in the horizontal well bridge plug staged fracturing process, after the bridge plug is lowered to the predetermined position through the cable (the pressure difference generated by pumping the liquid through the wellhead is lowered to the predetermined posi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/134
CPCE21B33/134
Inventor 何明舫张燕明马占国胡阳明毕曼李喆高伟苏国辉
Owner PETROCHINA CO LTD
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