SU991021A1 - Elevator for pulling-out and rotating pipes - Google Patents

Description

(54) ELEVATOR FOR LIFTING AND ROTATING PIPES

V

The invention relates to the drilling of wells, namely, devices for tripping operations.

A known elevator for raising and rotating pipes, comprising a housing and a barrel with a threaded adapter 1.

The drawback of the device is the complexity of the design and large overall dimensions, which reduces the reliability of the device as a whole.

The one closest to the invention is an elevator for raising and raising pipes, including a housing with a hub with projections pivotally connected to it, and a barrel with threaded

i; transitions and cams interacting with the protrusions of the sleeve {2.

A disadvantage of the known device is that it does not exclude the transfer of torque from the barrel to the body when firing and removing the drill pipe, which adversely affects the safety of working with the device.

The aim of the invention is to increase the safety of the operation of the device by making it possible to exclude the transmission of torque from the barrel to the body of the tfi on-L racking and extracting the drill bits.

This goal is achieved by the fact that in evil. vat dp raising and rotating pipes, including The other body with a hub with projections pivotally connected to it and a barrel with a threaded adapter — and cams interacting with the bosses of the sleeve;

10 with him ring} m, with eccentric cams installed between the sleeve housing with the ability to interact with the ring of the trunk.

FIG. 1 shows a common device.

15 species; in fig. 2 is a view A of FIG. one; in fig. 3 shows a section BB in FIG. one; in fig. four -; bb incision on fng. 2 .;

The device consists of a housing 1 with a grip 2 and a barrel 3 with a threaded adapter 4.

Claims (2)

In case I, a movable sleeve 6, made with projections 7, which can interact with cams 8 of trunk 3 for transferring axial load and torsion loops when unscrewing and unscrewing the gaps of the column, is pivotally mounted with a finger 5. The housing 1 has two eccentric cam 9, installed between the outer surface of the movable sleeve 6 and the inner surface of the housing 1. The cams 9 are rigidly fastened to the housing 1 with the pins 10 and the cams F interact with the presence of the forac 11 with a ring 12 mounted on the outer surface of the barrel 3, and the ring is loosely seated on the lower part of the barrel 3 by means of a nut 13, the Elevator works as follows. . If it is necessary to build up the drill pipe string with another drill pipe placed on a rack (not shown), the elevator is lowered to the rack and its body I is moved to an inclined position. At the same time, due to attachment to the housing 1 by pins 10, the eccentric cams 9 rotate around the fingers, the supporting part 11 of which interacts with the ring 12 and lifts the casing of the first elevator relative to the trunk 3. At the same time, the cams 8 of the trunk 3 are out of engagement with the protrusions 7 of the sleeve 6 and if the rotational rotation of the movable rotator is erroneously activated, the kinematic connection between the barrel 3 and the housing 1 of the inverter is open, i.e. the torque is not transmitted to the expandable pipe and the injury of the worker is excluded. The expandable pipe is fixed in the elevator with the aid of the gripper 2, and during the course of the movable rotator, the vertical position is moved upwards. In this case, the eccentric cams 9 occupy the initial position, and the housing 1 with the sleeve 6 is lowered, and the protrusions 7 of the sleeve 6 are engaged with the cams 8 of the barrel 3. The extraction of the drill pipes is carried out in the reverse order. Due to the fact that the transfer of torque from the barrel to the body is eliminated when the drill pipe is placed in a horizontal position, it is safe to carry out work to build up and extract the drill pipe. EFFECT: elevator for raising and rotating pipes, including a housing with a hub with projections pivotally connected to it, and a barrel with a threaded adapter and cams cooperating with the hub projections, in order to increase the safety of the device by providing the possibility of excluding the transfer of torque from the barrel to the body when building up and removing drill pipes, the body is equipped with eccentric cams rigidly attached to it, and the steel is movably connected to it with a ring; moreover, eccentric cams are installed between the sleeve and the housing with the possibility of interaction with the barrel ring. Sources of information taken into account in the examination 1. USSR author's certificate number 542818, cl. Е 21 В 19/06, 1974, 2. Authors certificate of the USSR W 324376, cl. E 21 V. 19/07, 1967 (protyptyp).