Portable mast:

See telescoping derrick.

Terms Related to Portable mast

• Mast

  A portable derrick that is capable of being erected as a unit, as distinguished from a standard derrick that cannot be raised to a working ...

• Telescoping derrick

  A portable mast that an be erected as a unit, usually by a tackle that hoists the wireline or by hydraulic pistons. The upper section ...

• Pole mast

  A portable mast constructed of tubular members. A pole mast may be a single pole, usually one or two different sizes of pipe telescoped together ...

• Back-in unit

  A portable servicing or workover rig that is self-propelled, using the hoisting engines for motive power. Because the driver's cab is mounted on the end ...

• Drive-in unit

  A type of portable service or workover rig that is self-propelled, using power from the hoisting engines. The driver's cab and steering wheel are mounted ...

• Outrigger

  A projecting member run out at an angle from the sides of a portable mast or a land crane to the ground to provide stability ...

• Production rig

  A portable servicing or workover outfit, usually mounted on wheels and self-propelled. A well servicing unit consists of a hoist and engine mounted on a ...