External expansion type soluble bridge plug

An expansion type, bridge plug technology, applied in the fields of petroleum exploration and oilfield development, can solve the problems of low material strength and unreliable sealing, and achieve the effect of good sealing effect, firm setting, and reduction of processing difficulty and cost.

Pending Publication Date: 2019-08-30
SHANDONG BOSAITE PETROLEUM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, due to the low material strength of the soluble bridge plugs in the prior art, the problem of unreliable sealing often occurs during fracturing operations

Method used

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  • External expansion type soluble bridge plug
  • External expansion type soluble bridge plug
  • External expansion type soluble bridge plug

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1, with reference to attached figure 1 , an externally expandable soluble bridge plug mentioned in the present invention, including a connector 1, a tie rod 2, a central tube 3, an upper slip seat 4, a slip tooth 5, an upper cone 6, a first retaining ring 7, The second retaining ring 8, the double setting cone 9, the external expansion rubber cylinder 10, the lower cone 11, the lower slip seat 12, the base 13, the first pin 14 and the second pin 15; Internal thread, the lower end of the connector 1 is threadedly connected with the upper end of the tie rod 2, and the center tube 3 is set on the outside of the tie rod 2. The upper part of the center tube is processed with a first pin ring groove 111, and the lower part of the center tube 3 is processed with a second pin ring groove. 222, the center pipe 3 is equipped with an upper slip seat 4, an upper cone 6, a first retaining ring 7, a second retaining ring 8, a double-sealing cone 9, an external expansion ru...

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PUM

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Abstract

The invention relates to an external expansion type soluble bridge plug. According to the technical scheme, the lower end of a connecting head is movably connected with the upper end of a pull rod; acentral tube sleeves the pull rod; an upper slip seat, an upper cone body, one first retaining ring, one second retaining ring, one dual-setting cone body, an external expansion rubber cylinder, another dual-setting cone body, another second retaining ring, another first retaining ring and a lower cone body sequentially sleeve the central tube from top to bottom. A lower slip seat sleeves the lower portion of the lower cone body and the pull rod. A base sleeves the lower portion of the lower slip seat and the pull rod. The two ends of an inner hole of the external expansion type rubber cylinder are of conical structures. The dual-setting cone body is in conical surface fit contact with the second retaining ring and the external expansion rubber cylinder. Slip teeth are inlaid in the upperslip seat and the lower slip seat. The external expansion type soluble bridge plug has the beneficial effects that the rubber cylinder is of an externally-expanded structure, the sealing compensationis large, and the sealing effect is good; the pull rod is designed in the inner hole of the central tube, the central tube is not stressed, strength requirements of the central tube are small, and theinner diameter is designed to be much larger; and the slip teeth are made of inlaid ultra-hard ceramic materials, so that the setting firmness is ensured.

Description

technical field [0001] The invention relates to the fields of petroleum exploration and oilfield exploitation, in particular to an outwardly expanding soluble bridge plug. Background technique [0002] Horizontal well development has the characteristics of large drainage area, high single well production, high degree of reserve production, and high recovery factor. With the continuous deepening of low-grade reservoir development, the use of horizontal well development has become an effective means to improve the comprehensive development benefits. The combined perforation and staged fracturing technology is the key technology for developing low-grade oil reservoirs in horizontal wells. This technology has the characteristics of simple construction string structure, no residue in the wellbore, and convenient post-measurement operations. Due to the self-dissolution of soluble bridge plugs, In this technology, soluble bridge plugs have incomparable advantages such as drillabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/134E21B33/127E21B33/129
CPCE21B33/127E21B33/129E21B33/134
Inventor 李江涛李海波杨鹏飞
Owner SHANDONG BOSAITE PETROLEUM TECH CO LTD
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