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a blocking tool

A technology for plugging tools and rubber cylinders, applied in the directions of sealing/isolation, wellbore/well components, earth-moving drilling, etc. The effect of blocking and improving the sealing effect

Inactive Publication Date: 2020-07-17
SOUTHWEST PETROLEUM UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual use, it is found that the current plugging tools have problems such as early plugging and poor sealing effect during the process of running into the wellbore.

Method used

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Embodiment Construction

[0024] In the following description, when it comes to specific directions, the end close to the bottom of the well is regarded as the lower part, and the end close to the wellhead is regarded as the upper part.

[0025] Such as Figure 1-2 As shown, the present invention provides a plugging tool. The plugging tool includes a mandrel 1, on the outside of the mandrel 1, there are arranged in turn from top to bottom a pin protection wire 2, an upper pressure ring 3, an upper slip 4, an upper cone 5, an upper retaining ring 6, and an upper rubber cylinder 7 , the middle rubber cylinder 8, the lower rubber cylinder 9, the lower retaining ring 10, the lower cone 11, the lower slip 12, the lower pressure ring 13, and the guide shoe 14, on the mandrel 1 and the upper rubber cylinder 7, the middle rubber cylinder 8, Liners 17 are arranged between the lower rubber cylinders 9 .

[0026] Further, the plugging tool is made of degradable materials. The degradable material can be degrada...

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Abstract

The invention provides a blocking tool. The blocking tool comprises a mandrel, a male buckle screw protector, an upper protection ring, upper portion slips, an upper cone body, an upper portion protection ring, an upper portion rubber cylinder, a middle rubber cylinder, a lower portion rubber cylinder, a lower portion protection ring, a lower cone body, lower slips, a lower protection ring and a guiding shoe are sequentially arranged outside the mandrel from top to bottom, and lining bodies are arranged between the mandrel and the upper rubber cylinder, between the mandrel and the middle rubber cylinder and between the mandrel and the lower rubber cylinder. Compared with an existing bridge plug drilling technology, the tool has the advantages that the structure formed through the upper cone body, the lower cone body, the mandrel and the lining bodies can limit rubber cylinder compression displacement effect, the rubber cylinders are prevented from being crushed by too large action force, failures and seal losing are prevented, the seal effect is improved, grooves are evenly distributed in the outer surfaces and the inner surfaces of the slips, in-advance plugging is prevented, thestress concentration effect is reduced, and the seal is improved.

Description

technical field [0001] The invention relates to the technical field of oil and natural gas exploration and development, in particular to a plugging tool. Background technique [0002] In recent years, with the large-scale exploitation of low-permeability and tight oil and gas reservoirs, multi-stage fracturing technology has been widely used in the field of oil and gas stimulation. In the fracturing process, it is necessary to use plugging tools in the wellbore to form a pressure holding effect to generate hydraulic fractures to communicate with the reservoir. Most of the currently used plugging tools are imitated from the tools provided by foreign oil service companies. Since most foreign oil service companies only provide on-site services and do not directly sell plugging tools, they have developed tools with independent intellectual property rights. Downhole plugging tools are of great significance for breaking foreign monopoly. [0003] After the research of domestic s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/128
CPCE21B33/128
Inventor 李东元罗平亚游艳平蔡为立白云飞张雅博李涪芳
Owner SOUTHWEST PETROLEUM UNIV