A kind of preparation method of sheet type high temperature resistant self-suspension plugging agent

A high-temperature-resistant, self-suspending technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of insufficient temperature resistance, difficult adjustment and control of thickness, poor suspension dispersion, etc., and achieves excellent heat resistance, suitable for Wide range, good heat resistance effect
CN111440348BActive Publication Date: 2022-05-03江苏鼎峰石油科技有限公司
4 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
江苏鼎峰石油科技有限公司
Publication Date
2022-05-03

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a sheet-type high-temperature-resistant self-suspension plugging agent and a preparation method thereof, belonging to the technical field of oil field engineering drilling plugging. The present invention uses bisphenol A, amino silicone oil and formaldehyde as main raw materials, and after prepolymerization, molding and curing in a mold to form a three-dimensional cross-linked thermosetting sheet; then use hydroxyl-terminated polyethylene glycol to graft the surface of the resin sheet modified to obtain the final product; the thermosetting resin prepared by the present invention adopts a compression molding process, and the thickness and size are adjustable and controllable. It has good high temperature resistance and can play a good plugging and anti-leakage effect in an environment above 150 °C; in addition, the flexible polyethylene glycol molecular chains on the surface of the resin sheet enable it to be uniformly and stably suspended and dispersed in the drilling fluid , to avoid or alleviate the problem of difficult application or poor use effect of conventional lost circulation plugging agents caused by sedimentation in drilling fluid.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

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

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

[0003] In response to the oil and gas engineering problem of d...

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
Login to View More