- Settore: Oil & gas
- Number of terms: 8814
- Number of blossaries: 0
- Company Profile:
Water that does not contain divalent cations, such as Ca<sup>+2</sup>, Mg<sup>+2</sup> or Fe<sup>+2</sup> and is therefore suitable for prehydrating bentonite or polymers.
Industry:Oil & gas
Water added to a maintain or dilute a water-mud system. The added water may be fresh water, seawater or salt water, as appropriate for the mud. Make-up water volume is an important parameter in a material balance check on solids content and solids removal efficiency for a mud system. The amount of dilution strongly influences mud economics. If soft make-up water is needed, treatments to remove hardness ions should be done prior to adding the water to the mud to avoid clay flocculation and polymer precipitation.
Industry:Oil & gas
Viscosity-gel meter. This jargon is used to describe the direct-indicating viscometer, the instrument commonly used to test flow properties of drilling muds.
Industry:Oil & gas
Two or three single joints of drillpipe or drill collars that remain screwed together during tripping operations. Most modern medium- to deep-capacity drilling rigs handle three-joint stands, called "trebles" or "triples. " Some smaller rigs have the capacity for only two-joint stands, called "doubles. " In each case, the drillpipe or drill collars are stood back upright in the derrick and placed into fingerboards to keep them orderly. This is a relatively efficient way to remove the drillstring from the well when changing the bit or making adjustments to the bottomhole assembly, rather than unscrewing every threaded connection and laying the pipe down to a horizontal position.
Industry:Oil & gas
Tubular steel conduit fitted with special threaded ends called tool joints. The drillpipe connects the rig surface equipment with the bottomhole assembly and the bit, both to pump drilling fluid to the bit and to be able to raise, lower and rotate the bottomhole assembly and bit.
Industry:Oil & gas
To unscrew drillstring components, which are coupled by various threadforms known as connections, including tool joints and other threaded connections.
Industry:Oil & gas
To unscrew drillstring components downhole. The drillstring, including drillpipe and the bottomhole assembly, are coupled by various threadforms known as connections, or tool joints. Often when a drillstring becomes stuck it is necessary to "back off" the string as deep as possible to recover as much of the string as possible. To facilitate the fishing or recovery operation, the backoff is usually accomplished by applying reverse torque and detonating an explosive charge inside a selected threaded connection. The force of the explosion enlarges the female (outer) thread enough that the threaded connection unscrews instantly. A torqueless backoff may be performed as well. In that case, tension is applied, and the threads slide by each other without turning when the explosive detonates. Backing off can also occur unintentionally.
Industry:Oil & gas
To take apart, disassemble and otherwise prepare to move the rig or blowout preventers.
Industry:Oil & gas
