Hybrid Drilling Rig with Rotating Coiled Tubing

摘要

CTU has been gaining importance in the oil industry. It is a multipurpose unit with one application being drilling. The major limitation of CTU was eliminated recently by inventing rotating coiled tubing which is yet to hit the commercial market. In this concept a conventional derrick based rig is modified to a Hybrid Drilling Rig. A coiled tubing unit is incorporated inside derrick structure itself at a height above the derrick floor which depends on type of derrick. The coiled tubing unit added is not the conventional one instead it is a unit that actually rotates the coiled tubing. This coiled tubing will be placed horizontally above the floor. It has a support structure passing through its center which is detachable. The use of this center structure is that it has straightening injector fixed in it and it supplies the torque to the CTU. Coiled tubing from the CTU will take a helical path around the support structure, pass through the injectors and become straight.