Features of Casing Drilling
Casing drilling and conventional drill pipe drilling have obvious advantages. It is a technical feature of drilling engineering and it can bring huge economic benefits to casting operators.
Casing drilling has the following characteristics:
1. Casing drilling uses standard oil well casing, and drilling and casing operations are performed simultaneously;
2. The downhole drilling tool assembly is installed at the lower end of the casing string, and can be quickly taken out through the inside of the casing with a wire rope. During the removal process, the mud can be continuously circulated;
3. Throughout the drilling process, keep the casing straight to the bottom of the well to improve the well control situation;
4. The casing is only drilled into the formation in one direction and no longer rises out. Unless it is confirmed that the well is dry after drilling, the last casing string may be taken out;
5. Casing drilling can continue to use many existing drilling technologies, such as directional drilling, cement injection, well logging, coring and well testing;
6. The main difference between the application of these technologies and the original one is that instead of relying on the drill pipe, the drill bit is replaced by the wire rope;
7. Casing drilling is performed using standard oilfield casing. The only difference is that casing couplings or threads need to be improved to provide the torque required for drilling.
http://www.xysteelpipe.com/info/Features-of-Casing-Drilling-1580-1.htm
Casing drilling has the following characteristics:
1. Casing drilling uses standard oil well casing, and drilling and casing operations are performed simultaneously;
2. The downhole drilling tool assembly is installed at the lower end of the casing string, and can be quickly taken out through the inside of the casing with a wire rope. During the removal process, the mud can be continuously circulated;
3. Throughout the drilling process, keep the casing straight to the bottom of the well to improve the well control situation;
4. The casing is only drilled into the formation in one direction and no longer rises out. Unless it is confirmed that the well is dry after drilling, the last casing string may be taken out;
5. Casing drilling can continue to use many existing drilling technologies, such as directional drilling, cement injection, well logging, coring and well testing;
6. The main difference between the application of these technologies and the original one is that instead of relying on the drill pipe, the drill bit is replaced by the wire rope;
7. Casing drilling is performed using standard oilfield casing. The only difference is that casing couplings or threads need to be improved to provide the torque required for drilling.
http://www.xysteelpipe.com/info/Features-of-Casing-Drilling-1580-1.htm
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