Controllable expandable lost circulation additive for petroleum drilling and production process thereof

Abstract

The utility model relates to a controllable expandable lost circulation additive for petroleum drilling and a production process thereof, and the controllable expandable lost circulation additive is used for the lost circulation resistance in the drilling process of petroleum exploration and development. The controllable expandable lost circulation additive is novel and mainly prepared from expandable resin A, temperature sensitive materials B and film forming materials C. The production process for the ontrollable expandable lost circulation additive for petroleum drilling comprises the following steps: mixing the temperature sensitive materials B with the film forming materials C through a pneumatic blender under the heating condition, heating a spray gun, an air pipe and a feed pipe until a set temperature is reached, supplying the materials to the spray gun through a peristaltic pump, atomizing coating solutions by utilizing the air pressure of an air compressor through the spray gun, and spraying the atomized coating solutions into a rotating coating pan filled with the expandable resin A to accomplish spray finishing. Compared with the existing lost circulation additive, the controllable expandable lost circulation additive has the advantages of extensive sources of raw materials, stable performance, longer shelf life, wide range of applicable temperature, nontoxicity, good effect of resisting lost circulation, and the like.

Description

technical field [0001] The controllable expansion plugging agent for petroleum drilling and the production process thereof of the present invention is a plugging agent used for leak prevention and plugging in the process of oil exploration and development drilling. Background technique [0002] At present, in oil exploration and development, among the many processes for controlling well leakage, using plugging materials processed from various natural materials for bridge plugging is the most commonly used plugging method at present. For a long time, engineers and technicians have optimized various plugging materials in practice according to different situations of lost circulation. However, the common defects of these materials are: first, the deformability of itself is relatively poor during the plugging process, particles slightly larger than the pores and cracks of the leakage layer or particles that do not match the shape of the pores and cracks of the leakage layer are ...

AI Technical Summary

Problems solved by technology

However, the common defects of these materials are: first, the deformability of itself is relatively poor during the plugging process, particles slightly larger than the pores and cracks of the leakage layer or particles that do not match the shape of the pores and cracks of the leakage layer are not easy to enter, and form on the surface of the leakage layer. Accumulated, did not go deep into the leakage layer

The second is that these plugging materials do not have expansibility or only have a small amount of expansion, so they are not easy to stay in the leakage layer stably under the action of external force

Third, most of the plugging materials will affect the performance of the drilling fluid after they are added to the drilling fluid.

Due to the above reasons, when these materials are used to treat lost circulation, it is easy to cause poor plugging effect and repeated leakage after plugging.