China Section Mill For Casing

China Section Mill For Casing 

Chinese manufacture of casing section mill,The Section Mill For Casing is a requisite tool for milled window in casing, which integrates casing cutting and forging and milling functions. The milling tool is run into the casing with the drilling tool assembly to cut the casing at the specified position. After the casing is completely cut, the casing is sectioned and milled directly from this position. After reaching a certain length, the milled window in casing is completed. With simple structure and convenient operation, the casing section mill is a very effective tool for milled window in casing. In addition, our section mill can squeeze cement in the abandoned well, so that the cement can directly contact the formation over a long distance 360-degree. The cement can enter via the existing voids and cracks of the formation to seal the reservoir. And the effect is far better than squeezing cement after perforation. 

Working principle: After the milling tool is run to the specified position in the casing with the drilling tool assembly, the turntable is started, the pump pressure is turned on, the pressure pushes the piston in the tool downward, and the cone under the piston pushes the blade to open and trim the naked eye. When the blade is opened to the maximum diameter, the naked eye trimming is completed. The blade can be opened directly under the continuous pump pressure supply, and the eye can be expanded directly downward. After the pump is stopped, the piston is reset under the action of the spring, and the blade is automatically retracted.