Back up:

Terms Related to Back up

• Tool joint

  A heavy coupling element for drill pipe. It is made of special ahoy steel and has coarse, tapered threads and seating shoulders designed to sustain ...

• Fourble

  A section of drill pipe, casing, or tubing consisting of four joints screwed together. Compare double, single, thribble.

• Drag blocks

  Spring-loaded buttons on a packer that provide friction with casing to retard movement of one section of a packer while another section rotates for setting.

• Dutchman

  A piece of pipe that has been twisted off inside a female connection; or a short section of material, such as belting or pipe, used ...

• 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 ...

• Buoyancy

  1. The apparent loss of weight of an object immersed in a fluid. If the object is floating, the immersed portion displaces a volume of ...

• Gaging nipple

  A small section of pipe in the top of a tank through which a tank may be gaged.