The Main Difference Between Tubing And Reservoir Casing

Tubing is a pipe used in oil wells for oil production, gas recovery, water injection, and acid fracturing.

The reservoir casing pipe is: When the drilling drilled to the target layer (oil, gas layer), the reservoir casing used, such as J55 casing pipe. It is mainly used to seal the oil and gas layers and the upper bare ground. The reservoir casing is internally oiled.

Tubing and casing are essential for oil production. Tubing is a pipe that enters the well casing in the normal production of the well. From the well, the oil flows into the ground through the tubing and enters the gathering process. In the wells, the combination of tubing, sucker rods, and deep well pumps (ie, "three pumping" equipment) pumps oil to the surface and enters the gathering and transportation process. The casing is the pipe that is run downhole after the drilling is completed. The casing and the well wall are cemented. Then the perforating gun is used to align the perforation of the target layer, so that the oil flows through the rock formation, cement ring, and casing into the well. At the end, enter the tubing again to the ground.

The main functions are: 1. Strengthen the wellbore wall to prevent the collapse of the strata; 2. Separate different oil layers and water layers to realize stratified mining; 3. It is convenient to implement fracturing and acidizing measures such as operation and maintenance work. 5, the formation of oil flow channels, with the oil pipe to achieve the purpose of oil production.

The sequence is as follows: after the well is drilled, the casing is run down, and the casing and the wall of the well are sealed with cement, and the oil pipeline is run down through the casing. The oil pipe is equipped with downhole tools such as oil packers and pumps. Under the oil pipe, a sucker rod is inserted into the oil pipe. The sucker rod pulls the piston of the pump up and down to reciprocate. In this way, oil is pumped to the ground.