The oil well casing gas is the oil separation gas that is led to the surface through the casing. The oil well is divided into two parts: the tubing and the casing. The tubing is the flow channel that the fluid is lifted to the surface after the pump works. The
casing pipe is the flow channel outside the tubing.
An oil well casing is a pipe that goes downhole after drilling, the casing and the wall of the well are sealed with cement, and then a perforating gun is used to perforate the target layer to make the oil flow through the rock layer, cement ring, and casing. At the bottom of the well, enter the tubing to the surface. The main functions of oil well casing are:
1. Reinforce the well wall to prevent stratum collapse;
2. Seal different oil layers and water layers to realize layered production;
3. Facilitate the implementation of fracturing, acidification and other measures and maintenance operations;
4. Form an oil flow channel and cooperate with the oil pipe to achieve the purpose of oil recovery;
The sequence is as follows: after the oil well is laid, the casing is run in, the casing and the wall of the well are sealed with cement, and the tubing is run in the casing. There are downhole tools such as oil packer and pump on the tubing. The sucker rod is inserted into the tubing. The sucker rod pulls the piston of the pump to reciprocate up and down. In this way, the oil is pumped to the ground.
