Biodegradable water-swelling plugging agent and preparation method thereof

A water-absorbing swelling and biodegradation technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of no swelling, poor compression and swelling performance, and difficult pumping, etc., to achieve good swelling ability and anti-swelling ability High pressure capacity, good pressure resistance performance, and the effect of improving drilling efficiency
CN111116850APending Publication Date: 2020-05-08潍坊华潍新材料科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
潍坊华潍新材料科技有限公司
Publication Date
2020-05-08
Patent Text Reader

Abstract

The invention discloses a biodegradable water-swelling plugging agent and a preparation method thereof. The biodegradable water-swelling plugging agent is prepared from the following raw materials inparts by weight: 30-80 parts of acrylic acid, 0 to 40 parts of acrylamide, 0 to 20 parts of 2-acrylamide-2-methyl propanesulfonic acid, 0.1 to 0.35 part of an initiator, 30 to 65 parts of a neutralizer, 0.1 to 0.35 part of a reducing agent, 0.2 to 0.5 part of a cross-linking agent, 3-10 parts of enteromorpha prolifera powder, 30 to 50 parts of bentonite, 50 to 120 parts of water, 0 to 20 parts ofnut shells, 0-10 parts of mica and 0-10 parts of vermiculite. The prepared water-swelling plugging agent is stable in structure, high in strength and good in viscoelasticity, still has good expansioncapacity and anti-pressure capacity in a high-temperature and high-pressure environment at the bottom of a well, is good in plugging effect, can be completely biodegraded in a soil environment, and isfriendly to the environment.
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Description

technical field

[0001] The invention belongs to the technical field of geological drilling and oil drilling plugging operations, and in particular relates to a biodegradable water-absorbing swelling plugging agent and a preparation method thereof. Background technique

[0002] Lost circulation is a downhole complex situation in which the working fluid leaks into the formation in drilling engineering, and it is one of the most common and frequently encountered complex problems in drilling operations. Because the downhole complex situation caused by lost circulation is very harmful to the drilling and completion construction, the lost circulation has always been a matter of great concern to the petroleum engineering circles at home and abroad. In the drilling operation, once leakage occurs, not only the drilling time will be delayed, the drilling fluid will be lost, the oil and gas layers will be damaged, and the normal progress of the geological logging work will be affected,...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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