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A kind of oil-based drilling fluid cutting agent and preparation method thereof

A technology of oil-based drilling fluid and cutting agent, applied in the field of drilling, can solve the problems of easy desorption of organic soil, reduce the dissolution rate, reduce the service life of oil-based drilling fluid, etc. The effect of improving temperature stability

Active Publication Date: 2018-12-25
BC P INC CHINA NAT PETROLEUM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the early stage, organoclays were widely used as oil-based drilling fluid shearing agents. However, organoclays are easy to desorb after high temperature, which reduces the solubility rate in oil, reduces the service life of oil-based drilling fluids, and is not conducive to low-permeability storage. layers of protection

Method used

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  • A kind of oil-based drilling fluid cutting agent and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] step 1

[0039] First add 9.8g maleic anhydride and 20.83g styrene to 49g toluene, then add them to the reactor, heat to 80°C, add 0.1532g azobisisobutyronitrile to the solution, and react under nitrogen protection for 3 Hours, the polymerization reaction produces a mixture T.

[0040] step 2

[0041] Under stirring conditions, 9.209g of glycerol and 0.19g of p-toluenesulfonic acid were added to the mixture T, and the stirring reaction was continued for 4 hours to obtain the crude oil-based drilling fluid cutting agent TQ.

[0042] step 3

[0043] The crude cutting agent TQ was suction filtered to remove toluene, and then dried in a constant temperature blast drying oven at 120°C to constant weight. After mechanical crushing, the oil-based drilling fluid cutting agent is obtained.

Embodiment 2

[0045] step 1

[0046] First add 9.8g maleic anhydride and 4.166g styrene to 147g toluene, then add them to the reactor, heat to 105°C, add 0.2793g azobisisobutyronitrile to the solution, and react under nitrogen protection for 3 Hours, the polymerization reaction produces a mixture T.

[0047] step 2

[0048] Under stirring conditions, 80 g of polyethylene glycol 2000 and 0.449 g of p-toluenesulfonic acid were added to the mixture T, and the stirring reaction was continued for 4 hours to obtain crude oil-based drilling fluid cutting agent TQ.

[0049] step 3

[0050] With embodiment 1 step 3. The solid product obtained by drying is mechanically pulverized to obtain the oil-based drilling fluid cutting agent.

Embodiment 3

[0052] step 1

[0053] First add 9.8g maleic anhydride and 10.415g styrene to 98g toluene, then add them to the reactor, heat to 80°C, add 0.2022g azobisisobutyronitrile to the solution, and react under nitrogen protection for 3 Hours, the polymerization reaction produces a mixture T.

[0054] step 2

[0055] Under stirring conditions, 6.1333g of glycerol and 0.1194g of p-toluenesulfonic acid were added to the mixture T, and the stirring reaction was continued for 4 hours to obtain the crude oil-based drilling fluid cutting agent TQ.

[0056] step 3

[0057] With embodiment 1 step 3. The oil-based drilling fluid cutting agent is obtained after the solid product obtained by drying is mechanically pulverized.

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Abstract

The invention provides an oil-based drilling fluid extracting and cutting agent and a preparation method thereof. The method comprises the following steps: maleic anhydride and styrene are subjected to a polymerization reaction under existence of a solvent and an initiator to obtain a mixture; the obtained mixture is subjected to a reaction under existence of an alcohols compound and a catalyst to obtain an extracting and cutting agent crude product; and the obtained extracting and cutting agent crude product is subjected to removal of an organic solvent, and then is dried and crushed to obtain the oil-based drilling fluid extracting and cutting agent. The oil-based drilling fluid extracting and cutting agent has a long straight chain alkyl group and contains a lot of polar groups, net structures are formed by the long chain alkyl group in an oil-based drilling fluid through association action, the polar groups in molecules are capable of interacting with other groups through electrostatic attraction or hydrogen bond, so that the net structure with larger specific surface area is formed, and the existence of the net structures effectively increases the dynamic cutting force of the drilling fluid.

Description

technical field [0001] The invention relates to the technical field of drilling, in particular to an oil-based drilling fluid cutting agent and a preparation method thereof. Background technique [0002] In the early stage, organoclays were widely used as oil-based drilling fluid shearing agents. However, organoclays are easy to desorb after high temperature, which reduces the solubility rate in oil, reduces the service life of oil-based drilling fluids, and is not conducive to low-permeability storage. layer of protection. Therefore, many scholars at home and abroad have carried out beneficial exploration and research, and developed a variety of oil-based drilling fluid shear lifting agents. [0003] In 1988, Arvind D Patel added copolymers of styrene-butadiene rubber polymers and amide or amine monomers to conventional oil-based drilling fluids to increase the dynamic shear force of the system. In 1998, Murray Cooperman developed a powdered cutting agent by reacting alko...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035C09K8/32C08F222/06C08F222/08
Inventor 赵家乐李英敏冯杰王发云黄伟王建华
Owner BC P INC CHINA NAT PETROLEUM CORP
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