COLLAR OF MECHANICAL PACKER Russian patent published in 1998 - IPC

FIELD: oil and gas production industry. SUBSTANCE: this can be used as component of mechanical packer for separating wells into zones isolated from each during operation and repair of wells. Ensured is reliable fastening and integrity of collar in packer operation and its removing. Collar has flexible component, unit for returning flexible component to transportation position, and clamps of flexible component. They are located in end zones. Clamps are made in the forms of nipples with inner annular grooves and with possibility for their drawing together or apart. In addition, clamps have two pairs of bushes with tapered surfaces - inner and outer ones for conjugation of bushes. Seated in inner annular grooves are thrust rings which create shoulder for interaction with at least one bush of each pair. Unit for returning flexible component to transportation position is made in the form of longitudinal threads located in flexible component and which reinforce this component. Threads are clamped between conjugated tapered surfaces of inner and outer bushes. EFFECT: high efficiency. 1 cl, 2 dwg