CRANELESS METHOD FOR MOUNTING AND DISMOUNTING DRILLING DERRICKS, MAST AND TOWER CONSTRUCTIONS WITH ENLARGED SECTIONS Russian patent published in 2004 - IPC

FIELD: oil, gas and water examination technology.

SUBSTANCE: method includes assembly by enlarged sections by means of two sets of pulleys which are connected by equalizing block, while fixed set of pulleys is fixed to an anchor on the ground, and moveable block is suspended on carrying tractions and it is placed higher than fixed block, two flat quadrangular, self-lifting, vertically placed outside of two opposite sides of derrick or frames construction which are connected by two horizontal pipe beams, having capability for fixing or defixing on third side of mounted section of derrick or construction, or on mounted section in four points. Frames are provided with iron rings with rollers which are extended and fixed in several intermediate positions depending on section dimensions. On rollers carrying and rotating tractions are freely placed. Carrying traction by one end is connected to one of iron rings, and by other end is fixed or defixed on moveable set of pulleys, prior to which a frame is fixed on previously mounted section of derrick or construction with capability for performing function of tower crane boom with fixed overhang for vertical transportation or joint connection of mounted section to previously mounted section of derrick or construction, and then frame is fixed on raises and jointly fixed mounted section. Rotating traction is fixed on moveable set of pulleys forming a lever for rotating mounted section for 180°, while concurrently frame is raised to height of section and increasing breaking moment is created by means of variably shoulder of counterweight relatively to joints.

EFFECT: simplified operations of assembling, higher reliability of method.

7 dwg