Casing Drilling Technology

Casing drilling is a technological revolution of the petroleum drilling engineering. The whole drilling process do not use the drill pipe, drill collar and other conventional tools, the tripping finished in the casing pipe with the fisher, change the drill bit without hoisting; and leave out the running casing procedure, avoid the blow out, pipe sticking during the tripping and casing running process, increase the drilling efficiency and safety, reduce the drilling cost.

Advantages of Casing Drilling

1. Increase the drilling efficiency

Compare with the conventional drilling with drill pipe, the casing drilling could save more that 30% drilling time.

•  The drill bit change in a special way, reduce the tripping time.
•  Running casing and drilling at the same time, leave out the running casing procedure.

2. Reduce the drilling cost

• Increase the drilling efficiency, save the drilling time.
• Do not require the drill pipe, drill collar. Reduce material consumption
• The casing drilling rig is more portable, easy to move, reduce the operation cost.

3. Reduce the drilling accident

• The casing pipe in the wellbore all the time, and there aren’t swabbing action against the wellbore when tripping procedure, it improve the well control situation.
• When tripping the drill bit with the wire rope, it could keeps the mud circulation continuous, in this way, it will avoid the bit cuttings get gathering, reduce the well kicking occurred. Meanwhile, due to the mud backtrack annular acreage is smaller, the mud backtrack speed is higher, this improve the bit cuttings taking out situation.

Features of Coupled Hydraulic Multi-function Drilling Equipment

1.     Adopt the trail-type, easy to transportation

2.     Adopt the top drive drilling system, more safety and efficiency, highly automated.

3.     Small size and light weight designing, convenience to control.

4.     Adopt the hydraulic travel system; it could achieve the automatic bit feed.

5.     High flexibility, it not only could drill with casing, but also drilling with the drill pipe and drill collar to finish the conventional drilling.

Specification