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Petroleum drilling fluid viscosity reducing agent as well as preparation method and application method thereof

A technology of oil drilling and viscosity reducer, which is applied in chemical instruments and methods, earthwork drilling, and flushing of wellbore, etc. It can solve the problems of loss of fluidity and rheological deterioration of water-based drilling fluid, etc., and achieve unique composition and high production efficiency. And the effect of simple and convenient application and long stable period

Inactive Publication Date: 2013-09-25
CNPC XIBU DRILLING ENG
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The present invention provides a petroleum drilling fluid viscosity reducer and its preparation method and use method, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem of drilling process The problem of poor rheology or even loss of fluidity in mid-water-based drilling fluids

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1, the oil drilling fluid viscosity reducer is obtained by the following method: first weigh 10 to 15 parts of humic acid, 10 to 15 parts of alkali, and 70 to 80 parts of lime in parts by weight, and then take the humic acid Acid, alkali and lime are mixed together to obtain oil drilling fluid viscosity reducer.

Embodiment 2

[0016] Embodiment 2, the oil drilling fluid viscosity reducer is obtained by the following method: first weigh 10 parts or 15 parts of humic acid, 10 parts or 15 parts of alkali, 70 parts or 80 parts of lime according to parts by weight, and then put the humic acid Acid, alkali and lime are mixed together to obtain oil drilling fluid viscosity reducer.

Embodiment 3

[0017] Embodiment 3, the preparation method of this oil drilling fluid viscosity reducer is carried out as follows: first take by weight respectively 10 parts to 15 parts of humic acid, 10 parts to 15 parts of alkali, 70 parts to 80 parts of lime, Then humic acid, alkali and lime are mixed together to obtain the oil drilling fluid viscosity reducer.

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Abstract

The invention relates to a petroleum drilling fluid processing agent and provides a petroleum drilling fluid viscosity reducing agent as well as a preparation method and an application method thereof. The petroleum drilling fluid viscosity reducing agent is obtained by using the following method which comprises the following steps: firstly, respectively weighing 10-15 parts of humic acid, 10-15 parts of an alkali and 70-80 parts of lime in parts by weight; then mixing the humic acid, the alkali and the lime to obtain the petroleum drilling fluid viscosity reducing agent. The viscosity reducing agent applicable to water base drilling fluid can control the hydration and cross-linking degrees of clay and the processing agent in the drilling fluid, so that the viscosity of the drilling fluid is controlled within a suitable range and the rheological property stable period of the drilling fluid is long; the petroleum drilling fluid viscosity reducing agent is unique in composition, abundant in raw material sources, low in price, and easy and convenient to produce and apply.

Description

technical field [0001] The invention relates to a treatment agent for petroleum drilling fluid, which is a viscosity reducer for petroleum drilling fluid and its preparation method and application method. Background technique [0002] Drilling fluid is a circulating fluid used in the oil drilling process, which is vividly called the blood of drilling. During the drilling process, the drilling fluid is first pumped into the drilling tool, then discharged through the water hole of the drill bit, and then returned to the ground from the outer annular space of the drilling tool. During the above circulation process, one of the functions of the drilling fluid is to carry the cuttings broken by the drill bit to the surface in time. After the cuttings are removed, the drilling fluid re-enters the wellbore for circulation. [0003] Drilling fluids are divided into water-based drilling fluids, oil-based drilling fluids and gas-based drilling fluids, among which water-based drilling ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03E21B21/00
Inventor 马世昌宋会光柯学王学成兰作军
Owner CNPC XIBU DRILLING ENG
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