Efficient temperature resistance fluid loss agent for drilling fluid and preparation method thereof

A filtrate reducer and drilling fluid technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as difficult exploration technology, unsatisfactory performance, and unstable wellbore walls, so as to reduce labor intensity And equipment investment, good temperature resistance, fast dissolution effect

A filtrate reducer and drilling fluid technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as difficult exploration technology, unsatisfactory performance, and unstable wellbore walls, so as to reduce labor intensity And equipment investment, good temperature resistance, fast dissolution effect

CN103666415AActive Publication Date: 2014-03-26河南海洋化工科技股份有限公司
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  • Efficient temperature resistance fluid loss agent for drilling fluid and preparation method thereof

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Effect test

Embodiment 1

[0010] The preparation method of high-efficiency temperature-resistant fluid loss reducer for drilling fluid: first add 2000kg of water to the reactor, heat up to 50°C, stir and add 150kg of sodium hydroxide, then stir and add 300kg of hydrolyzed polyacrylonitrile sodium salt, and then add 700kg Weathered coal, stirred and heated to 82°C, reacted for 3 hours, the resulting liquid with a concentration of 30% was pumped to the spray drying tower for atomization and drying to obtain spherical fine particles of high-efficiency temperature-resistant fluid loss reducer, the first time The recommended dosage is 3%.

Embodiment 2

[0012] The preparation method of high-efficiency temperature-resistant fluid loss reducer for drilling fluid: first add 2100kg of water to the reactor, heat up to 50°C, stir and add 175kg of sodium hydroxide, then stir and add 300kg of hydrolyzed polyacrylonitrile ammonium salt, and then add 600kg Weathered coal, stirred and heated to 82°C, reacted for 3 hours, the resulting liquid with a concentration of 28% was pumped to the spray drying tower for atomization and drying to obtain spherical fine particles of high-efficiency temperature-resistant fluid loss reducer, the first time The recommended dosage is 3%.

Embodiment 3

[0014] The preparation method of high-efficiency temperature-resistant fluid loss reducer for drilling fluid: first add 2100kg of water to the reactor, heat up to 60°C, stir and add 125kg of sodium hydroxide, then stir and add 250kg of hydrolyzed polyacrylonitrile sodium salt, and then add 700kg Weathered coal, stirred and heated to 80°C, reacted for 4 hours, the resulting liquid with a concentration of 28% was pumped to the spray drying tower for atomization and drying to obtain spherical fine particles of high-efficiency temperature-resistant fluid loss reducer, the first time The recommended dosage is 3%.

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Abstract

The invention discloses efficient temperature resistance fluid loss agent for drilling fluid and a preparation method thereof. The preparation method comprises the steps that firstly 200 to 230 parts of water are added into a reaction kettle to be heated to 50 to 60 DEG C; 15 to 18 parts of sodium hydroxide is added into the reaction kettle while being stirred; 25 to 40 parts of hydrolyzed polyacrylonitrile is added into the reaction kettle; finally 45 to 70 parts of decomposed coal is added into the reaction kettle; the mixture is heated to 80 to 85 DEG C; reaction is performed for 3 to 4 hours; obtained liquid is fed into drying equipment through a feeding pump; and then black brown spherical fine particle temperature resistance fluid loss agent is obtained. The efficient temperature resistance fluid loss agent is high in dissolving speed, can effectively reduce the loss amount during the drilling process, is in favor of protecting reservoir beds, has good temperature resistance, can be resistant to 200 DEG C, has a certain lubricating property, reduces the friction drag, improves the drilling speed, is simple in production technology, is not required to be cooled, and greatly reduces the labor intensity and the equipment use level, thereby reducing the production cost of enterprises and improving the economic benefit.

Description

technical field [0001] The invention relates to a petroleum drilling aid and a preparation method thereof, in particular to a high-efficiency temperature-resistant fluid loss reducer for drilling fluid used as a treatment agent for petroleum and natural gas drilling fluids and a preparation method thereof. Background technique [0002] With the increase of the world's energy demand and the development of drilling technology, the development of oil and gas in deep formations has become inevitable. This phenomenon is especially obvious in China. Due to the deep burial of resources, high technical requirements and difficult exploration technology, in this case Under the current situation, deep well drilling will definitely become an important development direction of China's petroleum industry. During the drilling process, due to the existence of formation temperature gradient and formation pressure gradient, the deeper the drilling depth, the higher the temperature and pressure...

Claims

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Application Information

Patent Timeline
26 Mar 2014
Publication
CN103666415A
IPC
C09K8/035
CPC
C09K8/03
Inventors
郑树坤