SU1393900A1 - Drilling crown bit - Google Patents

Description

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1 The invention relates to drilling, wellbores, and in particular to drilling rigs with movable rotator.

The purpose of the invention is to reduce the time required for lifting operations and simplify the design and installation.

FIG. 1 shows the proposed installation, general view; in fig. 2 odem columns from the well; FIG. 3-) Twining the drill pipe; on |) 4 - seizure of the drill pipe man-ultor; in fig. 5 - laying pipe | 1ani11 torus.

The drilling rig contains a mast i, inside of which there is a hydrocyc- INDR 2 with a rod 3, at the end of which there are rollers 4, a flexible element 5 (cable, chain) fixed at the mast 1, the carriage 6, to the “other” the end of the flexible element 5 with the formation of a double-to-reverse polyspast, directed 10–7 under the carriage b — with a fixed rotator 8, having a nojibrti spindle 9 with a normally open chuck 10, and a spindle rotation drive 11. In the NK-fay part of the mast 1, the tube holder is fixed: 12, equipped with cutting plate elements 13 for gripping the drill string, 14 and cup-shaped springs 15 to them, the hydraulic element 16 (unclamping) of the plate elements 13. At the top of the mast 1 there is a pipe opening 17 having a spindle 18 with a chuck 19, a drive 20 of the spindle 18, and a mechanism

21 displacement of pipe fracture 17 along mast 1. To skip lengthy and (5 large-diameter pipes, pipe turnings can be performed with a mechanism of removal from the well axis, I

The installation contains a manipulator 22,

mounted on the support 23, the rod 24, 45 liioBopoTHbm gripping body 25 with a pipe normally closing gripper 26 and the actuator 27 swinging the rod 24 of the manipulator 22. The rotary gripping body 25 is equipped with an actuator 28, which ensures its synchronous counter-rotation in proportion to I : 2 from the swing angle of the rod 24. In this case, the swing axis of the latter in the support 23 is located in the same horizontal plane 55 with the lower SS1 of the pipe 29 being fed to or below it.

Burov plant works as follows.

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During the drilling process, the string consisting of drill pipes 29 is located along the axis of the well 30 and is held by the chuck 10 of the rotator 8. The string 14 of the drill pipes passes through the open tubing hanger 12, the hollow spindle 9 of the rotator 8, is equipped in its upper part with a flushing seal 31 and results rotationally driven 11. Axial movement of the string 14 of drill pipes is connected by hydraulic cylinder 2 by means of rod 3, rollers 4, flexible element 5, carriage 6 on which rotator 8 with chuck 10 is attached. Flushing of well 30 is performed through the gland 31. The drilling rig also contains a rack 32 for laying pipes.

Upon completion of drilling, the flushing seal 31 is disconnected from the upper pipe 29 and retracted away from the axis of the well 30. The rotator 8, while continuing to hold the drill string 14 in the cartridge 10, moves to the extreme upper position. The end of the upper drill pipe 29, which protrudes from the pinch 9, enters the cartridge 19 of the tubing 17, which is in the lower position.

Plaiki I3 tube holder 12 capture the column 14 drill pipe. The cartridge 19 of the collar 17 also closes. The rotary actuator 11 of the rotator 8 and the actuator 20 of the turn 17 turn on to unscrew the drill pipe 29.

After stalling the threaded thread, with which the pipe 29 is connected to the drill string 14, the rotary chuck 10

8 opens and the latter moves down, passes through the spindle

9, a drill pipe that continues to be unscrewed by a pipe 17.

The unscrewed pipe 29 is raised by the movement mechanism 21 until a predetermined gap is formed between the pipe 29 and the column 14. The actuator 20 of the rotation of the reversal 17 stops. The lower free end of the pipe 29 is held on the borehole axis by the hollow spindle 9 of the rotator 8. The pipe 29 is gripped by the gripper 26 of the manipulator 22. The rotator 8, moving down, passes the gap between the lower end of the pipe 29 and the upper end of the drill string 14 and stops at a given distance below the upper end of the drill string 14,

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The cartridge 19 of the turnaround 17 releases the pipe 29 in the gripper 26 of the manipulator 22, and the mechanism 2 of the pipe deflector 7 rises above the upper end of the pipe 29.

The manipulator 22 is driven to a horizontal position by an actuator 27 for swinging the rod 24. At the same time, the pipe 29, which is located in the gripper 26 of the gripping organ 25, is moved to the rack 32 so that its upper end is on the rack 32 at the point least distant from the axis of the well 30, and its trajectory

that the skip of the rotator 8 moving to the upper position is ensured.

Simultaneously with the chuck 19 of the pipe 17, the cartridge 10 of the rotator 8 is held (holding the drill string 14) and the pipe holder 12 is opened. The working stroke of the rotator 8 along the lifting of the column 14 is performed simultaneously with the laying of the pipe 29 by the manipulator 22 and the turning of the pipe 17 by the mechanism 21 . lower position. The manipulator returns to the well axis during the idler of the rotator.

The descent} {olonnas into the well is carried out in reverse order.

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Claims (1)

DRILLING RIG, containing mast, hoist, movable rotary. a switch, a pipe holder, a pipe turn, a rack for horizontal pipe laying and a manipulator with a rotary drive and gripping bodies, characterized in that, in order to reduce time spent on tripping operations and simplify designs, the pipe turn is installed on the mast above the rotator with the possibility of interaction with the upper end pipes, and the manipulator is equipped with an additional drive for turning the gripping organs in the rotation plane ^ Sae Yu СО С © л- w Qut. 1