Drilling riser locking apparatus and method

Drilling riser locking apparatus and method

Drilling system and method for controlling equivalent...

Drilling waste handling

Drilling, production and oil storage caisson for deep water

Drilling, production, test, and oil storage caisson

Drilling, production, test, and oil storage caisson

Drilling, production, test, and oil storage caisson

Drilling-workover vessel having a drill string extending...

Drive system for turning a swivel

Dry tree subsea well communications apparatus and method...

Dry tree subsea well communications apparatus using variable...

Dual bore riser

Dual casing hanger

Dual concentric string high pressure riser

Dual radially locked subsea housing

Dual-BOP and common riser system

Dual-type plug for wellhead

Dynamically positioned, concentric riser, drilling method...