A downhole motor that rotates a bit by the action of the drilling mud on turbine blades b built into the tool. when a turbodrill is used, rotary motion is imparted only at the bit; therefore, it is unnecessary to rotate the drill stem. although straight holes can be drilled with the tool, it is [...]
Any packer designed to make a seal between the tubing and the casing during production
The course of drilling fluid downward through the annulus and upward through the drill stem, in contrast to normal circulation in which the course is downward through the drill stem and upward through the annulus. seldom used in open hole, but frequently used in workover operations. also referred to as “circulating the short way,” since [...]
A gearbox or other device serving to relay the power of a prime mover to auxiliary equipment.
A stratum of sand or porous sandstone from which natural gas is obtained.
See mechanical jar
A length of pipe whose bottom edge is serrated or dressed with a hard cutting material and that is run into the wellbore around the outside of stuck casing, pipe, or tubing to mill away the obstruction.
A cementing repair technique involving injecting cementing under pressure to fill channels in the primary cementing treatment.
Drill stem test tool; used for formation evaluation.
Creating a fracture in a carbonate and etching the face of the fracture to preserve flow capacity down the fracture.
A truck equipped with a pair of poles, and hoisting equipment for use in lifting heavy machinery around a lease.
A conducting ring that gives current to or receives current from the brushes in a generator or motor.