Bloque de corona y mesa de agua

1. Crown Block and Water Table

An assembly of sheaves or pulleys mounted on beams at the top of the derrick. The drilling line is run over the sheaves down to the hoisting drum. 2. Catline Boom and Hoist Line

A structural framework erected near the top of the derrick for lifting material.

3. Drilling Line

A wire rope hoisting line, reeved on sheaves of the crown block and traveling block (in effect a block and tackle). Its primary purpose is to hoist or lower drill pipe or casing from or into a well. Also, a wire rope used to support the drilling tools. 4. Monkeyboard

The derrickman's working platform. Double board, thribble board, fourble board; a monkey board located at a height in the derrick or mast equal to two, three, or four lengths of pipe respectively.

5. Traveling Block

An arrangement of pulleys or sheaves through which drilling cable is reeved, which moves up or down in the derrick or mast. 6. Top Drive

The top drive rotates the drill string end bit without the use of a kelly and rotary table. The top drive is operated from a control console on the rig floor.

7. Mast

A portable derrick capable of being erected as a unit, as distinguished from a standard derrick, which cannot be raised to a working position as a unit. 8. Drill Pipe

The heavy seamless drill pipe used to rotate the bit and circulate the drilling fluid. Joints of pipe 30 feet long are coupled together with tool joints.

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