Drill rod thread sealing grease for coal mine hydraulic measure

A thread sealing and sealing grease technology, applied in the petroleum industry, lubricating compositions, etc., can solve the problem of unsatisfactory lubricity and sealing, unable to continue to play auxiliary sealing and anti-galling, residue cleaning and treatment Pollution and other problems, to achieve good sealing, prevent sticking phenomenon, reduce the effect of corrosion

Inactive Publication Date: 2019-01-04
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary oil-based thread grease is a viscous paste before it is applied to the thread, and the state does not change after use under normal conditions, but it will gradually lose some of its components when it is affected by high temperature and pressure, and finally becomes dry powder , unable to continue to play its role of auxiliary sealing and anti-sticking
At the same time, the existing thread grease carrier is still grease, and the filler adopts polytetrafluoroethylene (Teflon PTFE), which causes pollution problems in the cleaning and disposal of residues; in addition, the sealing performance and assembly and disassembly of these products Operability was evaluated, and the lubricity and sealing properties of the product were not satisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The drill pipe thread sealant used for coal mine hydraulicization measures in this embodiment, the sealant raw material comprises the following components by weight: 30 parts of methacrylic acid, 25 parts of triethylene glycol, 1 part of sulfuric acid, terephthalic acid 0.1 part of phenol, 0.1 part of toluene, 2 parts of poly-2,6-dimethyl-1,4-phenylene ether, 5 parts of polyvinyl acetate, 5 parts of styrene elastomer, 10 parts of mica, 5 parts of ultra-fine graphite powder , 5 parts of ceramic particles, 1 part of polypropylene fiber, 1 part of cumene hydroperoxide, 3 parts of N-methyldiethanolamine, 5 parts of acidified saccharin, 1 part of polymerization inhibitor, 1 part of antioxidant, thickener 1 copy;

[0016] The particle size of the ceramic particles is 2.8 μm; the particle size of the polypropylene fiber is 0.1 mm;

[0017] The drill pipe thread sealant for coal mine hydraulicization measures is prepared by mixing methacrylic acid, triethylene glycol, hydroqui...

Embodiment 2

[0019] The drill pipe thread sealant used for coal mine hydraulicization measures in this embodiment, the sealant raw material comprises the following components by weight: 40 parts of methacrylic acid, 35 parts of triethylene glycol, 3 parts of sulfuric acid, terephthalic acid 0.6 parts of phenol, 0.6 parts of toluene, 6 parts of poly-2,6-dimethyl-1,4-phenylene ether, 10 parts of polyvinyl acetate, 10 parts of styrene elastomer, 20 parts of mica, 15 parts of ultra-fine graphite powder , 15 parts of ceramic particles, 5 parts of polypropylene fiber, 4 parts of cumene hydroperoxide, 8 parts of N-methyldiethanolamine, 10 parts of acidified saccharin, 3 parts of polymerization inhibitor, 5 parts of antioxidant, thickener 3 copies;

[0020] The particle size of the ceramic particles is 2.8 μm;

[0021] The drill pipe thread sealant for coal mine hydraulicization measures is prepared by mixing methacrylic acid, triethylene glycol, hydroquinone and toluene, stirring and heating to ...

Embodiment 3

[0023] The drill pipe thread sealant used for coal mine hydraulicization measures in this embodiment, the sealant raw material comprises the following components by weight: 30 parts of methacrylic acid, 35 parts of triethylene glycol, 1 part of sulfuric acid, terephthalic acid 0.6 parts of phenol, 0.1 parts of toluene, 6 parts of poly-2,6-dimethyl-1,4-phenylene ether, 5 parts of polyvinyl acetate, 10 parts of styrene elastomer, 10 parts of mica, 15 parts of ultra-fine graphite powder , 5 parts of ceramic particles, 5 parts of polypropylene fiber, 1 part of cumene hydroperoxide, 8 parts of N-methyldiethanolamine, 5 parts of acidified saccharin, 3 parts of polymerization inhibitor, 1 part of antioxidant, thickener 3 copies;

[0024] The particle size of the ceramic particles is 2.8 μm;

[0025] The drill pipe thread sealant for coal mine hydraulicization measures is prepared by mixing methacrylic acid, triethylene glycol, hydroquinone and toluene, stirring and heating to a temp...

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Abstract

The invention discloses drill rod thread sealing grease for a coal mine hydraulic measure. The drill rod thread sealing grease for the coal mine hydraulic measure comprises methacrylic acid, triethylene glycol, sulfuric acid, hydroquinone, methylbenzene, poly-2,6-dimethyl-1,4-phenylate, polyvinyl acetate, a styrene elastomer, mica, superfine graphite powder, ceramic particles, polypropylene fibers, isopropyl benzene hydroperoxide, N-methyldiethanolamine, acidized saccharin, a polymerization inhibitor, an antioxidant, and a tackifier. A particle size of the ceramic particles is 2.8 um. High temperature resistance can reach 700 DEG C, and high pressure resistance is 100 MPa. Wettability is good. All possible leakage channels of a thread can be adequately filled by the sealing grease, and anelastic-plastic body polymer is formed by solidifying. A sealing layer is formed on the surface of the thread, and a hole and a gap do not exist in a sealing place, so moisture and other corrosive substances cannot be stored, and the corrosive effect is reduced. The sealing grease is good in leakproofness, and good in lubricity, and capable of preventing a thread gluing phenomenon without containing oil, lead, heavy metal, toxicity, and abiotic degradation components.

Description

technical field [0001] The invention relates to a sealing grease, in particular to a drill pipe thread sealing grease for coal mine hydraulicization measures. Background technique [0002] Gas disaster is an important factor restricting the safety production of coal mines and the development of coal industry in our country. With the increase of coal mining depth and mining scale, the geological conditions of coal seams are becoming more and more complex, the difficulty of gas extraction is increasing, and the safety problems of coal mines are becoming more and more prominent. Hydraulic measures such as hydraulic fracturing, hydraulic slotting, hydraulic punching, and coal seam water injection, as key technologies for coal seam pressure relief and permeability enhancement and regional gas control, have achieved remarkable results in coal mines. At present, related technologies are constantly being developed and improved, and are being promoted and applied. In the specific i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10N30/06C10N30/08C10N40/34C10N50/10
CPCC10M169/04C10M2201/041C10M2201/084C10M2201/103C10M2203/06C10M2205/024C10M2205/04C10M2205/06C10M2207/024C10M2207/026C10M2207/046C10M2207/06C10M2207/122C10M2209/062C10M2209/10C10M2215/042C10M2215/062C10M2217/026C10M2219/104C10N2030/06C10N2030/08C10N2040/34C10N2050/10
Inventor 刘延保熊伟彭明辉赵旭生申凯孙海涛巴全斌张碧川向真才
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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