What is the difference between pipe and casing?
Tubing is a pipe that enters the casing of an oil well during normal production. In a nozzle well, oil flows through pipes to the surface and enters the collection and transportation process. In mechanical production wells, tubing,
Rod and deep well pumps ("three-pump" units) combine to bring oil pumps to the surface for collection and transportation.
The casing is the pipe that enters the well after drilling. The casing and the wall of the well are sealed with cement, and then the target layer is drilled with a drilling gun to make the oil flow through the rock formation, cement ring, and then the casing is inserted into the hole bottom and the tube is inserted into the surface.
The main features are:
1. Strengthen the borehole wall to prevent the formation from collapsing;
2. Separate different layers of oil and water to achieve layered production;
3. Promote the implementation and maintenance of fractures, acidification, etc. 4 Form an oil flow channel, cooperate with the oil pipe and achieve the purpose of oil return.
The sequence is as follows: after laying the well, the casing begins to work, the casing and the wall of the well are sealed with cement, and the pipeline is extended into the casing. Downhole tools, such as oil packers and pumps, are connected to the pipe and rods are inserted into the pipe. The rod pulls on the pump piston.
