Crown Block And Travelling Block at Traveling

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Crown Block And Travelling Block. The pulleys are assisted by travelling blocks that together are capable of hoisting heavy loads with the use of 3/4 inch to 1 1/2 inch diameter drilling line. Features of drilling rig crown blocks:

China Customized Sheave For Oil Drilling Rig Crown Block
China Customized Sheave For Oil Drilling Rig Crown Block from www.baohaopetroleum.com

Companies have been installing limit switch devices on their drawworks for a number of years, but we still get reports of crown damage and personal injuries resulting from the traveling block hitting the crown. Oil and gas drilling and servicing operations, michigan administrative code r 408, february 8, 2013. Listen for excessive bearing wear noises.

China Customized Sheave For Oil Drilling Rig Crown Block

A crown block is a fixed set of pulleys at the top of the derrick of a drill rig over which the drilling line is threaded. A crown block is the stationary section of a block and tackle that contains a set of pulleys or sheaves through which the drill line (wire rope) is threaded or reeved and is opposite and above the traveling block. A crown block is a fixed set of pulleys at the top of the derrick of a drill rig over which the drilling line is threaded. There are typically five or more pulleys on the crown block and four or more pulleys on the traveling block that results in the traveling block moving at one fourth the speed of the fast line (for a four active pulley system) and the force exerted by the hook being four times the force on the draw works.