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Ball carrying type dissoluble bridge plug

A bridge plug and ball-type technology, which is applied in the field of ball-carrying dissolvable bridge plugs, can solve the problems that dissolvable bridge plugs cannot be inspected and sand plugged, so as to achieve full-bore production, save drilling and grinding costs, and avoid The effect of the second pitch

Inactive Publication Date: 2020-02-07
DONGHAO MECHANICAL & ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a ball-carrying dissolvable bridge plug, which solves the problem that the existing dissolvable bridge plug cannot realize seal inspection and sand plugging before perforation after setting

Method used

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  • Ball carrying type dissoluble bridge plug
  • Ball carrying type dissoluble bridge plug
  • Ball carrying type dissoluble bridge plug

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A ball-carrying dissolvable bridge plug, see Figure 1-Figure 4 , including a mandrel 1, an upper anchoring mechanism 22 installed on the mandrel, a lower anchoring mechanism 3, a sealing assembly 4 located between the upper and anchoring mechanisms, a guide shoe 5 installed at the bottom of the mandrel, and a 1 The setting mechanism 6 at the upper end, and the fracturing ball 7 made of dissolvable material; the structures and working principles of the above-mentioned upper anchor mechanism 22, lower anchor mechanism 3, and sealing assembly 4 belong to the known technology in the art, No further details are given here; the setting mechanism 6 includes a setting sleeve 6-1, a connecting shaft 6-2, and a push ring 6-3; the connecting shaft 6-2 is inserted in the setting sleeve 6-1, and can be 6-1 slides axially, the upper end of the connecting shaft is connected with the external tension, the other end of the connecting shaft 6-2 is provided with a fracturing ball accommo...

Embodiment 2

[0029] A ball-carrying soluble bridge plug such as Figure 5 As shown, it includes a mandrel 1, an upper anchor mechanism 22 installed on the mandrel, a lower anchor mechanism 3, a sealing assembly 4 between the upper and anchor mechanisms, a guide shoe 5 installed at the bottom of the mandrel, and a The setting mechanism 6 at the upper end of the mandrel 1, and the fracturing ball 7 made of dissolvable material; the structure and working principle of the above-mentioned upper anchor mechanism 22, lower anchor mechanism 3 and sealing assembly 4 belong to the well-known in the art technology, and will not be described here; the setting mechanism 6 includes a setting sleeve 6-1, a connecting shaft 6-2, and a push ring 6-3; the connecting shaft 6-2 is inserted in the setting sleeve 6-1, and can be inserted along the The setting sleeve 6-1 slides axially, the upper end of the connecting shaft is connected with the external tension, the other end of the connecting shaft 6-2 is prov...

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Abstract

The invention relates to a ball carrying type dissoluble bridge plug which includes a mandrel, an upper anchoring mechanism, a lower anchoring mechanism, a seal assembly, a guide shoe and a setting mechanism. The setting mechanism includes a setting sleeve, a connecting shaft and a push ring; and the other end of the connecting shaft is provided with a fracturing ball accommodating cavity, a ballseat is fixed at the upper end of the mandrel, and a fracturing ball made of a soluble material is placed in the ball seat; and the fracturing ball fits a fracturing ball placement groove of the ballseat to form a mandrel seal structure. According to the ball carrying type dissoluble bridge plug, the soluble ball is a fully soluble ball which can be completely dissolved to achieve the goals of saving drilling and grinding cost and realizing full-bore production, secondary ball putting is avoided, and the overall work efficiency is better improved; the bridge plug can be subjected to seal examining before perforation, and confirmation of normal setting of the bright plug and verification of the pressure bearing capacity of the bright plug are carried out; and the fracturing ball can be released to the ground or quickly dissolved, so that the problem of sand plugging is solved.

Description

technical field [0001] The invention relates to the field of oilfield drilling, in particular to a ball-carrying dissolvable bridge plug for downhole plugging in oilfields. Background technique [0002] As a downhole plugging tool used in oilfields, bridge plugs are widely used in oilfield exploration and development to plug the lower well sections during the construction of oil-water wells for layered fracturing, layered acidification, and layered oil testing. It better solves the problems of complex setting, salvage and unsealing operations, and low success rate of use. In terms of function, it can partially replace hands-off + packer, permanent bridge plug and ash injection plugging. It is a safe and reliable , low-cost, fully functional downhole plugging tool. [0003] At present, bridge plugs are divided into soluble, composite bridge plugs, and large diameter bridge plugs. Composite bridge plugs are commonly used in the early development of shale gas. During the cons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/134
CPCE21B33/134
Inventor 田伟东谢公艮罗裕强
Owner DONGHAO MECHANICAL & ELECTRONICS