Rubber plug for cementing well

A rubber plug and cementing technology, applied in the field of rubber products, can solve problems such as easy aging of cementing rubber, and achieve the effects of shortening plasticizing time, saving energy and improving heat resistance.

Inactive Publication Date: 2016-01-06
成都棕通石油配件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the current cementing rubber is easy to age and needs to be replaced frequently

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A rubber plug for well cementing, in parts by weight, the formula of the rubber plug for well cementing is: 100 parts of natural rubber NR; 2 parts of lignocellulose; 40 parts of fine particle calcium carbonate; 5 parts of zinc oxide; 4 parts of magnesium oxide 10 parts of accelerator DM; 1 part of anti-aging agent NBC; 20 parts of vulcanizing agent BP; 20 parts of rubber peptizer SJ-1032.

Embodiment 2

[0016] A rubber plug for well cementing, in parts by weight, the formula of the rubber plug for well cementing is: 100 parts of natural rubber NR; 8 parts of lignocellulose; 20 parts of fine particle calcium carbonate; 25 parts of zinc oxide; 4 parts of magnesium oxide parts; accelerator DM5 parts; anti-aging agent NBC5 parts; vulcanizing agent BP5 parts; rubber peptizer SJ-1035 parts.

Embodiment 3

[0018] A rubber plug for well cementing, in parts by weight, the formula of the rubber plug for well cementing is: 100 parts of natural rubber NR; 3 parts of lignocellulose; 30 parts of fine particle calcium carbonate; 5 parts of zinc oxide; 4 parts of magnesium oxide parts; 8 parts of accelerator DM; 1 part of anti-aging agent NBC; 15 parts of vulcanizing agent BP; 3 parts of rubber peptizer SJ-1033.

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PUM

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Abstract

The invention provides a rubber plug for cementing a well and belongs to the field of rubber products. In order to solve the problem that existing rubber for cementing the well is easy to age and needs to be frequently exchanged, the invention provides the rubber plug for cementing the well. The rubber plug for cementing the well comprises the following components in parts by weight: 100 parts of natural rubber NR, 2-8 parts of lignocellulose, 20-40 parts of fine particle calcium carbonate, 5-25 parts of zinc oxide, 4 parts of magnesium oxide, 5-10 parts of an accelerant DM, 1-5 parts of an antiaging agent NBC, 5-20 parts of a vulcanizing agent BP and 2-5 parts of a rubber peptizer SJ-103. By selecting the raw materials in content, the prepared rubber product is high in strength, less in creep deformation, great in compression elasticity and good in leakproofness, has excellent oil resistance and aging resistance and can be widely used to cement heads in petroleum drilling and exploitation to play a role of isolating different liquids in a cementing job.

Description

technical field [0001] The invention belongs to the field of rubber products, in particular to a rubber plug for well cementing. Background technique [0002] Cementing is an important operation in the drilling process. In drilling operations, there are generally at least two cementings (production wells), and up to 4 to 5 cementings (deep exploration wells). The top cementing is the surface casing cementing, which plays the role of "mud passage, oil and gas portal". Before the next spud, a blowout preventer should be installed on the surface casing to prevent blowout. A mud conduit should be installed above the blowout preventer, which is the passage for the drilling fluid to return to the mud pool. During the drilling process, technical casing cementing is often required, which plays the role of "consolidating the rear and exploring the road safely". Like highway tunnels and roadways in coal mines, well collapse, high pressure and unstable formations will also be encou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L97/02C08K13/02C08K3/26C08K3/22
Inventor 祈琪黄明
Owner 成都棕通石油配件有限公司
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