A kind of composite resin lubricating anti-slump agent for drilling fluid and preparation method thereof

Abstract

The invention discloses a compound resin lubricating anti-collapse agent for drilling fluid. The compound resin lubricating anti-collapse agent is prepared from the following raw materials in parts bymass: 40-60 parts of vegetable oil for industry purpose, 1-2 parts of an alkali solution, 15-30 parts of petroleum resin and 5-8 parts of a surfactant. The compound resin lubricating anti-collapse agent takes the vegetable oil for industry purpose as a raw material, contains the petroleum resin product and has low production cost, no or low toxicity on organisms and no pollution to the environment. A prepared product can effectively reduce friction resistance and torque in a drilling process, reduces occurrence of sticking of drill tools and other complicated accidents in a down hole, has good lubricating properties and strong temperature resistance as compared with other drilling fluid treatment agents, can effectively substitute for bitumen products, is more favorable for large-scale popularization and application, has obvious economic benefits, improves the anti-collapse sealing performance of a drilling fluid system, and effectively solves the problems of low lubricating coefficient of drilling fluid and insufficient sealing performance of the anti-collapse agent.

Description

technical field [0001] The invention belongs to the technical field of oil and gas well engineering, and in particular relates to a composite resin lubricating anti-slump agent for drilling fluid and a preparation method thereof. Background technique [0002] Drilling fluid lubricant is an important chemical treatment agent for drilling fluid. Its function is to improve the lubricity of drilling fluid and reduce drilling friction. Drilling friction, also known as drilling friction, refers to the frictional resistance between the drilling string and the well wall during drilling, mainly composed of the axial friction force and axial friction torque of the drill string. During the drilling process, when drilling with a diamond drill bit, the drilling tool is required to rotate at a high speed, and the annular gap between the drilling tool and the well wall is small, and the same is true for wireline core drilling. Because the resistance generated by the high-speed rotation o...

AI Technical Summary

Problems solved by technology

With the increasingly stringent national environmental protection policies, the development of drilling fluid technology has higher and higher requirements for environmental protection. Among them, asphalt-based treatment agents are used as the key components of lubricating anti-slump agents for drilling fluids. Asphalt-based anti-slump agents have good plugging performance. But there is fluorescence, and its environmental performance is poor

In order to simultaneously solve the wellbore stability and drilling fluid lubricity during the drilling process, the method of adding anti-slumping agent and lubricant at the same time is often used on site, but the simultaneous addition of anti-slumping agent and lubricant increases the cost of drilling fluid and makes the drilling fluid The composition is complex and the maintenance difficulty increases

Lubricating and anti-slump agents are now facing increasing environmental protection pressure. Domestic oil fields have adopted more and more restrictive measures on sulfonated and asphalt drilling fluid treatment agents, and even banned the use of such treatment agents.

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