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Oil resistant stator rubber used for positive displacement motor drill with equal wall thickness

A screw drilling tool and oil stator technology, which is applied in the field of oil-resistant stator rubber materials for thick wall screw drilling tools and its preparation, can solve the problems of shortened drilling tool life, stator rubber failure, and rubber Mooney viscosity increase. Long burning time, good oil resistance and low Mooney viscosity

Inactive Publication Date: 2015-07-01
SINOPEC OILFIELD EQUIP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently developed equal-wall-thickness screw drilling tool stator rubber material has a long service life in water-based mud, but in the oil-based mud environment containing a large amount of diesel components, this stator rubber material will produce a large volume expansion. The physical and mechanical properties are reduced, the life of the drilling tool will be greatly shortened when going downhole, and it will even lead to the rapid failure of the stator rubber. Therefore, it is urgent to develop a stator rubber material with good oil resistance
Although increasing the content of acrylonitrile in the rubber material can improve the oil resistance of the rubber, and the increase of the content of acrylonitrile will increase the Mooney viscosity of the rubber, and the technical performance of the rubber cannot meet the single-side injection of the motor stator rubber of the equal wall thickness screw drilling tool. Glue process requirements

Method used

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  • Oil resistant stator rubber used for positive displacement motor drill with equal wall thickness
  • Oil resistant stator rubber used for positive displacement motor drill with equal wall thickness

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Effect test

Embodiment 1

[0029] An oil-resistant stator rubber for equal wall thickness screw drilling tools, which is made of the following raw materials in parts by mass: 100 parts of nitrile rubber N230S, 5 parts of zinc oxide, 1 part of stearic acid, 60 parts of carbon black N330, plasticizer DINP 15 parts, anti-aging agent RD 3 parts, anti-aging agent 40202 parts, sulfur 2 parts, accelerator DM 1 part, anti-scorch agent PVI 0.5 parts.

[0030] The preparation method of the oil-resistant stator rubber for the equal-wall thickness screw drilling tool includes the following steps:

[0031] 1) Weigh raw materials according to the above-mentioned ratio of parts by mass, including nitrile rubber, zinc oxide, stearic acid, carbon black, plasticizer, anti-aging agent, vulcanizing agent, accelerator, anti-scorch agent;

[0032] 2) Put nitrile rubber in a kneader for 120-150 seconds, add zinc oxide, stearic acid, anti-aging agent, vulcanizing agent and mix for 90-120 seconds, then add 1 / 2 of carbon black a...

Embodiment 2

[0040] An oil-resistant stator rubber for screw drilling tools with equal wall thickness, which is made of the following raw materials in parts by mass: 100 parts of nitrile rubber NBR3606, 5 parts of zinc oxide, 1 part of stearic acid, 40 parts of carbon black N33040 parts, and 20 parts of carbon black N55020 , plasticizer TP-9510 parts, anti-aging agent 4010NA 3 parts, anti-aging agent 40202 parts, sulfur 2 parts, accelerator CZ 1 part, anti-scorch agent PVI 0.5 parts.

[0041] The preparation method of the oil-resistant stator rubber for the equal-wall thickness screw drilling tool includes the following steps:

[0042] 1) Weigh raw materials according to the above-mentioned ratio of parts by mass, including nitrile rubber, zinc oxide, stearic acid, carbon black, plasticizer, anti-aging agent, vulcanizing agent, accelerator, anti-scorch agent;

[0043] 2) Put nitrile rubber in a kneader for 130 seconds, add zinc oxide, stearic acid, anti-aging agent, vulcanizing agent and m...

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Abstract

The invention relates to an oil resistant stator rubber used for a positive displacement motor drill with an equal wall thickness. The oil resistant stator rubber is prepared from the raw materials in following parts by mass: 100 parts of nitrile rubber, 5-10 parts of zinc oxide, 1-2 parts of stearic acid, 50-80 parts of carbon black, 5-20 parts of a plasticizer, 3-5 parts of an antiager, 2-4 parts of a vulcanizing agent, 0.5-1.5 parts of a promoter, and 0.3-1 part of a scorch retarder. The rubber prepared by the invention has good oil resistant performance, and the rubber Mooney viscosity is low, and thus the requirement of single side glue injection process for the positive displacement motor drill with the equal wall thickness can be met, and the problems that the rubber Mooney viscosity is increased and the rubber mobility is poor caused by increase of acrylonitrile content are solved.

Description

technical field [0001] The invention belongs to the field of rubber materials and their preparation, and relates to an oil-resistant stator rubber material for equal-wall-thickness screw drilling tools and a preparation method thereof. Background technique [0002] As the production scale of shale gas wells becomes larger and larger, oil-based mud is used more and more widely in the drilling process. The currently developed equal-wall thickness screw drilling tool stator rubber material has a longer service life in water-based mud, but in the oil-based mud environment containing a large amount of diesel components, this stator rubber material will produce a large volume expansion. The physical and mechanical properties are reduced, and the life of the drilling tool will be greatly shortened when going downhole, and even lead to the rapid failure of the stator rubber. Therefore, it is urgent to develop a stator rubber material with good oil resistance. Although increasing th...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08K13/02C08K3/22C08K5/09C08K3/04
CPCC08K13/02C08K3/04C08K3/06C08K3/22C08K5/09C08K2003/2296C08L9/02
Inventor 欧阳江林胡三德张烈华汪猛张玲
Owner SINOPEC OILFIELD EQUIP CORP
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