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High-airtight thread sealing grease

A thread sealing and gas sealing technology, which is applied in the formula of environment-friendly thread sealing grease, deep well and medium-deep well, gas well, and thread sealing grease with high air-tightness. There are no uniform standards and other issues, and the effects of meeting the sealing and lubrication performance, enhancing the lubrication performance, and good sealing performance are achieved

Active Publication Date: 2012-08-15
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, special threaded joints have disadvantages such as complex processing, high price, non-interchangeability of threads, no uniform standard for inspection, and high requirements for downhole operation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] First, prepare various raw materials according to the ratio of A:B:C=4~10:1:310~400, and then configure A and B components. The components in component A are by weight percentage: methanol 74%, deionized water 19%, ethylenediaminetetraacetic acid tetrasodium salt 7%; the components in B component are: tetraethylene glycol dimethyl Acrylic ester 94%, p-benzoquinone 6%; the components of C component are: tetraethylene glycol dimethacrylate 13%, tetraethylene glycol diisocaprylate 16%, n-octanol 14%, bisphenol A fumaric acid resin 18%, mica 12%, graphite 17%, flexible graphite 3%, cumene hydroperoxide 1%, fumed silica 6%. A:B:C=7:1:360. Special thread sealant with high airtightness can be prepared by mixing each raw material after preparation.

[0018] The special thread sealant prepared according to the above formula has been used in more than 160 gas wells. It is used in conjunction with API threaded joint casings to replace the original special threaded joint casings....

Embodiment 2

[0020] First, prepare various raw materials according to the ratio of A:B:C=4~10:1:310~400, and then the ingredients of component A are as follows: methanol 69%, deionized water 22%, ethylenediamine Tetrasodium tetraacetate 9%; the components of B component are: tetraethylene glycol dimethacrylate 90%, p-benzoquinone 10%; the components of C component are: tetraethyl Diol dimethacrylate 13%, Tetraethylene glycol diisocaprylate 16%, n-octanol 14%, bisphenol A fumaric acid resin 18%, mica 12%, graphite 17%, flexible graphite 3 %, cumene hydroperoxide 1%, fumed silica 6%. A:B:C=7:1:360. After preparing various raw materials, the thread sealant with high airtightness can be prepared through mixing.

[0021] The special thread sealant prepared according to the above formula has been used in more than 20 medium-deep gas wells, and used with API threaded joint casings to replace the original special threaded joint casings, which met the sealing requirements and did not leak.

Embodiment 3

[0023]First prepare various raw materials according to the ratio of A:B:C=4~10:1:310~400, and then the ingredients of component A are as follows: methanol 69%, deionized water 22%, ethylenediamine Tetrasodium tetraacetate 9%; the components of B component are: tetraethylene glycol dimethacrylate 91%, p-benzoquinone 9%; the components of C component are: tetraethylene glycol dimethacrylate according to weight percentage Diol dimethacrylate 13%, Tetraethylene glycol diisocaprylate 16%, n-octanol 14%, bisphenol A fumaric acid resin 18%, mica 12%, graphite 17%, flexible graphite 3 %, cumene hydroperoxide 1%, fumed silica 6%. A:B:C=7:1:360. After preparing various raw materials, the thread sealant with high airtightness can be prepared through mixing.

[0024] The special thread sealant prepared according to the above formula has been used in more than 10 medium-deep gas wells, and used with API threaded joint casings to replace the special threaded joint casings that were origin...

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PUM

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Abstract

The invention relates to a high-airtight thread sealing grease, which comprises a component A, a component B and a component C, wherein the component A comprises the following components by weight percent: 50 to 74 percent of methanol, 1 to 28 percent of water and 1 to 28 percent of tetrasodium salt of EDTA; the component B comprises the following components by weight percent: 65 to 95 percent of4-ethylene glycol dimethacrylate and 5 to 35 percent of para-benzoquinone; the component C comprises the following components by weight percent: 5 to 26 percent of 4-ethylene glycol dimethyl methacrylate, 5 to 19 percent of 4-Glycol ethylhexoate, 4 to 18 percent of n-caprylic alcohol, 8 to 22 percent of bisphenol A fumarate resin, 2 to 18 percent of mica, 3 to 25 percent of graphite powder, 0.5 to 4 percent of flexible graphite, 0.5 to 3 percent of cumene hydroperoxide and 1 to 16 percent of gas-phase silica; the weight ratio of A, B and C is: A:B:C=4 to 10: 1:310 to 400; the sealability of the oil pipe, the bushing and the pipeline connector is improved; the high-airtight thread sealing grease can substitute the particular thread connector oil bushing; and the high-airtight thread sealing grease is applicable to the gas well, the deep well and the middle-deep well.

Description

technical field [0001] The invention relates to a formula of thread sealing grease for oil pipes, casing pipes and line pipes. The invention relates to a formula of environment-friendly thread sealing grease. The invention relates to a formula of thread sealing grease with high air-tightness. Using the invention can effectively improve the tightness of oil pipes, casings and pipeline joints; use the invention to cooperate with API oil casings to replace expensive special threaded joint oil casings to a certain extent; the invention is especially suitable for gas wells and deep wells and Zhongshenjing. Background technique [0002] In the process of oil drilling, exploration and development, casing strings, tubing strings, and drill strings are all connected to long pipe strings through threaded joints. During the threaded connection process, in order to prevent thread sticking and ensure the connection and use process According to the specification, an appropriate amount of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/10
Inventor 田峰王耀光林凯王建军上官丰收
Owner BC P INC CHINA NAT PETROLEUM CORP