This is not to suggest that the bit can make hole alone, nevertheless, the bit is the mast critical item of a drilling operation.

10) Swivel
https://www.szzzxcl.com/
Swivel is a mechanical device that must simultaneously suspend the weight of the drill string, provide for rotation of the drill string beneath it while keeping the upper portion stationary, copper bonded and permit high-volume flow of high-pressure drilling mud from the fixed portion to the rotating portion without leaking. As is true of almost every part of many rotary rigs, the blocks and wire-line assembly must have great strength to be able to bear heavy loads.

② Main functions of rotary table

Rotary table serves two main functions:

a. To rotate the drill stem;

b.

China-ogpe. It contains a set of pulleys or sheaves which the drill line (wire rope) is threaded or revved and is opposite and above the traveling block. It is a structure with four supporting legs resting on a square base, the entire work area of the floor is in the derrick square. To hold devices called slips that support the weigh of the drill stem when the latter is not supported by hook and elevators.

① Traveling block is a free moving section of a block and tackle that contains a set of pulleys or sheaves through which the drill line is threaded or revved and is opposite (and under) the crown block (the stationary section).

A drilling rig mainly consists of crown block, traveling block, hook, derrick, swivel, Kelly, drawworks, rotary table, blowout preventer, bit, drill collar, drill string, centrifuge, surface casing, mud ditch, mud pit, pulsation dampener, mud pump, and engine.


コメント