SU998725A1 - Drill string running-in and retracting apparatus - Google Patents

Description

(54) DEVICE TO LIFT AND DOWN THE COLUMN OF PIPES

one

The invention relates to a drilling technique, in particular, to devices for lowering and lifting a string of pipe during underground repair of wells.

A device for lifting and lowering a column of pipes, comprising a mast and an elevator connected to a movable part of a hydraulic motor through a polyspast system 13, is known. A device for raising and lowering a column is also known, including a mast with guides of an elevator connected through an accelerator 11) polyspast system with a moving part of the linear motor 2.

However, the polyspast system, which increases the speed of movement of the elevator, reduces the load capacity of the device, which reduces its operational capabilities.

The purpose of the invention is to expand the operational capabilities of the device by increasing its capacity.

The goal is achieved by the fact that the device for raising and lowering the tubing string, including the mast with the elevator guides connected via the accelerating polyspast system with the moving part of the linear motor, is equipped with at least one additional elevator, connected directly to the moving part of the linear hydraulic motor movement.

Figure 1 shows the device, a general view, figure 2 - view A in figure 1; on fig.Z - view B in figure 2; on fig.410 section bb-b in fig. 2, - in fig. 5 - section g-d in fig. 2, - in fig. b - sequence of operations when the tubing is lifted by the main elevator; 7 - the same, additional

15 elevators.

The device for lifting and lowering the well pipe string consists of the base 1 with the oil station 2 installed on it, a pipe wrench 3 and

20 with a mast 4 with a linear motor 5 (figure 1), represented by u-. two parallel cylinders of the same kind 6 (FIG. 2), for aligning the rod moves;

25 cocks 7 of which are connected by a balancing frame 8. The total force of the hydraulic cylinders 6 is directed along the axis of the well. Frame 8 is structurally the upper part of the movable

30 of the section 9 and provided with blocks 10. The lower part of the movable section 9 is a frame 11 equipped with blocks 12. The movable section 9 is equipped with guides 13 (FIG. 4), on which a cross bar 14 is mounted for movement along section 9. The latter is connected with a rope 15 (FIG. 2) and. a cable 16, the first of which is transferred through block 10 in the part of the movable section 9 and the other end is fixed in the upper part of the fixed section 17, and the cable 16 is transferred through the block 12 in the lower part of the movable section 9 and fixed in the other end in the upper part of the fixed section 17. The device has four parallel cable systems. An elevator 18 is fixed to Nafraversa 14, an additional elevator 19 is installed on the frame, and an additional elevator 20 is mounted on frame 11. Elevators 18-20 have slots for draining the pipe from the borehole axis and supplying it to it, as well as a central opening for the passage of couplings. Frames 8 and 11 and traverse 14 have slots and holes for the same purpose (fig. 3, 4 and 5). Hydraulic Cylinders

5 are connected by pipelines (not shown) at the oil station 2. A spider 22 is mounted at the wellhead 21, holding the column 23 with sleeves 24,

The device operates as a lift pipe string as follows.

In the initial position, the column of pipe 23 by the spider 22 is kept on weight by the spider 22 is closed, and the elevator 18 is in the upper position, with the rods 7 of the hydraulic cylinders of the hydraulic motor, 5 extended, the mobile section 9 extended, the elevators 19 and 20 are also in the upper position and Elevators 18-20 are open (fig-ba).

. When the oil from the oil station 2 in the rod end of the hydraulic cylinders

6, the rods 7 thereof, being pulled in, move the movable section 9 downward with those installed along it; elevators 19 and 20. In this case, the rope 16, thrown through the blocks 12, lowers the traverse 14

with an elevator 18 down. After the elevator 18 is below the coupling 24 of the column 23, the oil supply is stopped, the hydraulic engine 5 stops. After closing the elevator 18 (fig.bb), the oil is supplied to the piston cavities of the hydraulic cylinders of the hydraulic engine 5. The rods 7 of the hydraulic cylinders 6 move the moving section upwards 9 with elevators 19 and 20. At the same time, the rope 15, thrown through blocks 10, lifts the yoke 14 with the elevator 18 from the column pipe 23 held by it. The spider .22 opens and does not interfere with lifting (Fig. Bv and I). The rise of the column continues until the spider

the next column coupling will not show, after which the oil supply to the hydraulic motor 5 stops, the spider 22 closes, the elevator 18 opens (fig.bd). By means of a key 3, the pipe of the column 23 is turned away and manipulating devices (not shown) are retracted from the axis of the well (Fig. 10). Then the cycle repeats.

The pipe is lowered into the well in reverse order.

In the device, the polyspast system doubles the turn of the elevator 18 compared to the stroke of the rods 7 hydraulic cylinders b of the hydraulic motor 5. The weight of the lifting column by the elevator 18 is half the force developed by the hydraulic actuator 5 ..

In the case when the increased capacity of the device is required, for example, when a pipe string is stuck in a well, its operation is as follows.

From the initial position (Fig. 7a), the elevators 1820 are lowered until the latter is below the coupling 24 of the column 23. After closing the elevator 20 (Fig. 7b), oil is supplied to the hydraulic motor 5. The movable section 9 moves upwards and lifts the installed on it, an elevator 20 with a column of pipes 23 held by it, while the spider 22 binds and does not hinder lifting (fig. 7c and d). After stopping the elevator 20, the spider 22 is closed and the tubing string 23 is held by it (FIG. 7e). Elevator 20 opens. The hydraulic motor 5 lowers the movable section 9 until the elevator 19 is below the coupling 24 of the column 23. After the elevator 19 is closed (FIG. 7e) and the fluid is supplied to the hydraulic motor 5, the mobile section 9 moves up, and the spider 22 opens and lifts An elevator 19 mounted thereon with a column 23 held by it. At the end of the stroke (FIG. 7G), the hydraulic motor 5 stops, the spider 22 is closed, and the column 23 is held by it in weight. The elevator 20 opens (Figure 7b). Further, the operation of the installation proceeds in any of the ways indicated.

The descent of the pipe string is performed in the reverse order.

The increased axial force provided by the device allows faster elimination of complications arising in the process of underground repair of wells.

Claims (2)

1. USSR author's certificate | for the application No. 2849386, cl. E 21 B 19/00, 1979 2.Patent UK  1502626, class E 1 F, 1978 (prototype / one AT. r1 FIG. 2 Vida 2f // / / / SB U JS 20 /,  . - / 7