| 摘要 |
FIELD: oil and gas production. ^ SUBSTANCE: device includes a body with the centre passage, downhole equipment thread, and primary and upstanding additional recesses on an external surface wherein there are main and additional rollers respectively. The additional rollers are parallel or slightly deviated from the parallelism to the central axis of the device. The rollers rotate on the main and additional axes respectively. An upper end of the main axis is detachably connected at an angle to a lower end of the additional axis. The lower end of the main axis is arranged in a hinge and turns in a plane passing through the longitudinal geometrical axes of the body and the main and additional rollers. The upper end of the additional axis is detachably fixed in the body. ^ EFFECT: improved flaring efficiency and reliability, lower material inputs. ^ 1 dwg |
