Preparation method of sheet type high-temperature-resistant self-suspension plugging agent

A high-temperature-resistant, self-suspension technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of difficult adjustment and control of thickness, poor suspension dispersion, insufficient temperature resistance, etc., to achieve excellent heat resistance, durability Good thermal performance and wide application range
CN111440348AActive Publication Date: 2020-07-24江苏鼎峰石油科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
江苏鼎峰石油科技有限公司
Publication Date
2020-07-24

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Abstract

The invention discloses a sheet type high-temperature-resistant self-suspension plugging agent and a preparation method thereof, and belongs to the technical field of oil field engineering drilling plugging. The preparation method comprises the following steps: taking bisphenol A, amino silicon oil and formaldehyde as main raw materials, carrying out prepolymerization, and carrying out mould pressing and curing in a mould to form a three-dimensional cross-linked thermosetting sheet; and then carrying out graft modification on the surface of the resin sheet by utilizing hydroxyl-terminated polyethylene glycol to obtain a final product. The thermosetting resin prepared by the preparation method adopts a compression molding process, the thickness size is adjustable and controllable, and the thermosetting resin is good in high-temperature resistance due to the fact that a large number of aromatic structural units and polysiloxane structural components which are crosslinked with one anotherexist in molecules, and a good leaking stoppage and leakage prevention effect can be achieved in an environment of 150 DEG C or above; besides, flexible polyethylene glycol molecular chains exist onthe surfaces of the resin sheets so that the resin sheets can be uniformly and stably suspended and dispersed in the drilling fluid, and the problem that a conventional plugging agent is difficult toapply or poor in using effect due to sedimentation in the drilling fluid is avoided or relieved.
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Description

technical field

[0001] The invention belongs to the technical field of oil field engineering drilling plugging, and in particular relates to a preparation method of a sheet-type high-temperature-resistant self-suspension plugging agent. Background technique

[0002] Lost circulation is the phenomenon that drilling fluid leaks into the bottom layer under the action of pressure difference during drilling, cementing, workover and other downhole operations. In downhole operations, lost circulation is a phenomenon that often occurs. Once it happens, it will not only delay the drilling progress, lose the drilling fluid, increase the drilling cost, but also damage the oil and gas layers and interfere with the geological logging work. When the leakage is serious, it is easy to cause adverse conditions such as pipe sticking, blowout, and well collapse, and even lead to the scrapping of the wellbore, resulting in huge economic losses.

[0003] Aiming at the oil and gas engineering p...

Claims

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