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An easy-to-drill anti-rotation anchoring structure

An anti-rotation and anchoring technology, which is used in earth-moving drilling, wellbore/well components, sealing/packaging, etc., can solve the problems of difficult drilling and milling, easy drilling and sticking, and achieve the effect of improving the ease of drilling and milling.

Active Publication Date: 2018-08-24
四机赛瓦石油钻采设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used drillable metal bridge plugs generally have the disadvantages of easy drilling and difficulty in drilling and milling.

Method used

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  • An easy-to-drill anti-rotation anchoring structure
  • An easy-to-drill anti-rotation anchoring structure
  • An easy-to-drill anti-rotation anchoring structure

Examples

Experimental program
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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] This embodiment provides an easy-to-drill anti-rotation anchoring structure, such as figure 1 and figure 2 As shown, it includes slips 7, snap ring 6, and cone backing ring 8. There are 8 pieces of slips, which are evenly distributed along the inner circumference of the casing 30, and the circumference of the cone backing ring 8 is evenly arranged The eight dovetail grooves 20.3 adapted to the aforementioned eight slips 7 are tightened and assembled by two snap rings 6 arranged in parallel along the inner circumference of the casing 30 .

[0025] Further, such as image 3 and Figure 4 As shown, the slip 7 includes six end surfaces of front, rear, left, right, upper and lower, and the upper end surface 15 is a serrated surface provided with 5 serrations, and the tip directions of the 5 serrations all face the front end surface 16 The first t...

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PUM

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Abstract

The invention relates to the field of petroleum industry oil and gas production devices, in particular to an anti-rotation anchoring structure beneficial to drilling. The structure is used for a pressure bridge plug and comprises clips, clamping rings and a cone back ring. The eight clips are evenly distributed in a sleeve circumferentially. Eight dovetail grooves matched with the eight clips are evenly formed in the cone back ring circumferentially. The eight clips are fastened and assembled by the two clamping rings which are arranged in the sleeve circumferentially in parallel. The structure has the advantages that the clips and the cone back ring in a composite bridge plug anchoring structure are optimized, the drilling and milling beneficial performance is improved after a bridge plug setting perforation hole is fractured, rotating prevention performance during drilling and milling is improved, and the anchoring and pressure bearing capacity of the clips is improved.

Description

technical field [0001] The invention relates to the field of oil and gas production equipment in the petroleum industry, in particular to an easy-drilling anti-rotation anchoring structure for pressure bridge plugs. Background technique [0002] At present, with the development of oil and gas fields and the continuous depletion of non-renewable energy sources, unconventional oil and gas will become an important substitute for future oil and gas energy. my country is rich in shale gas resource reserves, but due to the characteristics of low porosity and ultra-low permeability of shale gas reservoirs, multi-level and multi-stage fracturing technology is required for reservoir reconstruction in order to effectively increase single well production. At present, the commonly used multi-stage fracturing technologies at home and abroad mainly include open-hole packer staged fracturing technology, static string hydraulic jet staged fracturing technology, coiled tubing sandblasting pe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B23/01E21B33/134
CPCE21B23/01E21B33/134
Inventor 邹刚周歆杨小城汪建李应虎
Owner 四机赛瓦石油钻采设备有限公司