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Oil-based drilling fluid shear-lifting agent composition, oil-based drilling fluid shear-lifting agent product and preparation method thereof, and oil-based drilling fluid

A technology of oil-based drilling fluid and cutting agent, applied in the field of oil-based drilling fluid, can solve the problems of difficulty in opening the pump, sticking of the drilling fluid to the drill pipe, affecting the rheology of the system, etc., so as to ensure that the wellbore is clean and has strong temperature resistance , the effect of good application prospects

Active Publication Date: 2021-08-17
CHINA PETROCHEMICAL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This phenomenon is especially obvious in high-density oil-based drilling fluids, which makes it difficult to control the rheology of oil-based drilling fluids. High-density oil-based drilling fluids are too thick, which seriously affects the rheology of the system and brings a series of problems to subsequent drilling operations. , such as poor tripping, drilling fluid sticking to the drill pipe, easy to induce lost circulation, difficulty in starting the pump, etc.
Therefore, in order to make up for the defects of domestic oil-based drilling fluid cutting agents, it is urgent to develop a low-cost one that can effectively solve the poor rheological properties of existing drilling fluids and improve the suspension and stability of oil-based drilling fluids for heavy materials and cuttings. New oil-based drilling fluid cutting agent with carrying capacity

Method used

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  • Oil-based drilling fluid shear-lifting agent composition, oil-based drilling fluid shear-lifting agent product and preparation method thereof, and oil-based drilling fluid
  • Oil-based drilling fluid shear-lifting agent composition, oil-based drilling fluid shear-lifting agent product and preparation method thereof, and oil-based drilling fluid
  • Oil-based drilling fluid shear-lifting agent composition, oil-based drilling fluid shear-lifting agent product and preparation method thereof, and oil-based drilling fluid

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preparation example Construction

[0064] In the preparation method of the present invention, acrylic acid, acrylamide and 2-acrylamidotetradecanesulfonic acid have undergone a three-way copolymerization reaction, so the surface grafting of the composite modified hectorite of the present invention has acrylic acid, acrylamide and 2- Random copolymer of acrylamidotetradecanesulfonic acid. Preferably, in the composite modified hectorite, the structural unit from acrylic acid monomer: the structural unit from acrylamide monomer: the molar ratio of the structural unit from 2-acrylamidotetradecanesulfonic acid monomer is 3-10: 0.5-5: 0.5-3, more preferably 4-8: 1-3: 0.5-2; more preferably 5-7: 1-2: 1-1.5.

[0065] In the present invention, based on the weight of the composite modified hectorite, the structural unit derived from acrylic acid monomer, the structural unit derived from acrylamide monomer and the structural unit derived from 2-acrylamidotetradecanesulfonic acid monomer The proportion of the total weight o...

preparation example 1A

[0129] (1) Add 0.06 mol of 1,12-dibromododecane, 0.084 mol of 1,4-dimethylpiperazine and 75 mL of dimethyl sulfoxide into a 1000 mL dry three-necked flask, and react at 55°C for 3 hour, then add N-methylimidazole 0.002mol and N-methylmorpholine 0.002mol, react at 55° C. for 3 hours, and remove the solvent by distillation under reduced pressure to obtain polyquaternium salt;

[0130] (2) In a 100mL dry three-necked flask, add 0.01mol of 1,3,5-tris(4-naphthyloxy-1,8-dioic acid)phthalic anhydride and 25mL of m-cresol in sequence, Stir under low temperature, when 1,3,5-tris(4-naphthyloxy-1,8-dioic acid) phthalic anhydride is completely dissolved, add 0.005mol of 3,3'-diaminobenzidine, stir at room temperature After 45 minutes, heat to 75°C, react for 4 hours, then react at 180°C for 10 hours, after the reaction, cool to room temperature, and quickly pour it into 2000mL of methanol to obtain a large amount of solid precipitation, then wash the solid precipitate repeatedly with meth...

preparation example 2A

[0133] (1) Add 0.1 mol of 1,12-dibromododecane, 0.092 mol of 1,4-dimethylpiperazine and 85 mL of dimethyl sulfoxide into a 1000 mL dry three-necked flask, and react at 45°C for 6 Hour, add N-methylimidazole 0.0022mol and N-methylmorpholine 0.0022mol again, react at 45 ℃ for 6 hours, after decompression distillation removes solvent, make polyquaternium salt;

[0134] (2) In a 100mL dry three-necked flask, add 0.015mol of 1,3,5-tris(4-naphthyloxy-1,8-dioic acid) phthalic anhydride and 28mL of m-cresol in turn, under nitrogen protection Under stirring, when 1,3,5-tris(4-naphthyloxy-1,8-dioic acid)phthalic anhydride is completely dissolved, add 0.006mol of 3,3'-diaminobenzidine, and stir at room temperature After 50 minutes, heat to 78°C, react for 3 hours, and then react at 185°C for 8 hours. After the reaction, cool to room temperature, and quickly pour it into 2000mL of methanol to obtain a large amount of solid precipitation, and then wash the solid with methanol repeatedly P...

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Abstract

The present invention relates to the field of drilling fluids, in particular to an oil-based drilling fluid shear-improving agent composition, an oil-based drilling fluid shear-improving agent product and a preparation method thereof, and a shear-improving agent composition containing the oil-based drilling fluid or the An oil-based drilling fluid for the above-mentioned oil-based drilling fluid with a cutting agent product. The oil-based drilling fluid cutting agent composition comprises the following components: 100 parts by weight of base oil, 1-20 parts by weight of hectorite, 1-20 parts by weight of attapulgite, 1-20 parts by weight of dispersant and Agent 5-10 parts by weight. The oil-based drilling fluid shear-lifting agent composition or the oil-based drilling fluid shear-lifting agent product of the present invention can make the oil-based drilling fluid have better rheological properties, better suspension and carrying capacity for weighted materials and cuttings , and lower production cost. The cutting agent for drilling fluid of the present invention can exert a good effect in oil-based drilling fluid.

Description

technical field [0001] The present invention relates to the field of drilling fluids, in particular to an oil-based drilling fluid shear-improving agent composition, an oil-based drilling fluid shear-improving agent product and a preparation method thereof, and a shear-improving agent composition containing the oil-based drilling fluid or the An oil-based drilling fluid for the above-mentioned oil-based drilling fluid with a cutting agent product. Background technique [0002] Drilling fluid has the functions of cleaning the bottom of the well and carrying cuttings; cooling and lubricating the drill bit and drill string; balancing the side pressure of the well wall rock, sealing and stabilizing the well wall; balancing the formation pressure; reducing the sedimentation velocity of cuttings; cuttings; effectively transmit hydraulic power; bear part of the gravity of the drill pipe and casing; provide a large amount of data on the drilled formation; break rocks through hydraul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/32C08G81/00
CPCC08G81/00C09K8/32
Inventor 刘均一陈二丁万绪新郭保雨王宝田王俊杨倩云赵红香王金利刘伟
Owner CHINA PETROCHEMICAL CORP
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