دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. a derrick or crane shaped like the letter A and used to handle heavy loads. 2. an A-shaped openwork structure that is the stationary and supporting component of the mast of a jackknife rig and to which the mast is anchored when it is in an upright or drilling position. 3. the uppermost section of a standard derrick, shaped like the letter A and used as a support in lifting objects such as the crown block to the water table.

n: A kind of "A" frame gin pole, used to elevate heavy object.

n: a large load-bearing structure, usually of bolted construction. In drilling, the standard derrick has four legs standing at the comers of the substructure and reaching to the crown block. The substructure is an assembly of heavy beams used to elevate the derrick and provide space to install blowout preventers, casingheads, and so forth. Because the standard derrick must be assembled piece by piece, it has largely been replaced by the mast, which can be lowered and raised without disassembly. Compare mast.

n: A large load-bearing structure from which the drill string is suspended.

The elevated section of a rig that rises above the substructure and houses the crown block and draw works.

n: Numbering standard derrick mask of 2.1m height with floors according to API criterion.

n: a structural steel, opensided tower raised vertically by special lifting tackle attached to the travelling block. See mast. Compare standard derrick.

n: a drilling rig d1at has a jackknife mast instead of a standard derrick.

n: the depth of the solid desiccant bed, in a solid desiccant dehydration system, from saturation to initial adsorption. mast n: a portable derrick that is capable of being raised as a unit, as distinguished from a standard derrick, which cannot be raised to a working position as a unit For transporting by land, the mast can be divided into two or more sections to avoid excessive length extending from truck beds on the highway. Oil workers and manufacturers often use the words mast" and "derrick" interchangeably. Compare derrick.

v: to move a rig with a standard derrick from the location of a lost or completed hole preparatory to starting a new hole. Skidding the rig allows the move to be accomplished with little or no dismantling of equipment.

n: a derrick that is built piece by piece at the drilling location, as opposed to a jackknife mast, which is preassembled. Standard derricks have been replaced almost totally by jackknife masts. Compare mast.

n: The derrick that four legs extended to crown block and fixed with base in the mouth of a well.

n: an opening at floor level in a side of a derrick or mast. The V -door is opposite the drawworks and is used as an entry to bring in drill pipe, casing, and other tools from the pipe rack. The name comes from the fact that on the old standard derrick, the shape of the opening was an inverted V.

n: The opening in front of the derrick,which make things convenient for lifting the drill string and casing.