SU768933A1 - Plant for moving pipes from well onto racks and for feeding them to well mouth - Google Patents

Description

Reception bridge 1 is made of three separate sections. Conveyors 2 are placed along the axis of the first two sections (counting from the landing site), and the third section of the walkway has a solid flooring and is equipped with a limit switch 6, which is activated when pipe 7 moves along the conveyors 2.

Pipelayers 3 are placed in transverse slots between the individual sections of the receiving bridge 1 and are a lever 9 rotating on axis 8 (Fig. 2), at the free end of which, on the hinge 10, the working organ I is attached, having the form of an upturned two-pronged fork. The working body 11 is provided with a chain gear 12 with a gear ratio equal to one, moreover, the turning sprocket 13 (FIG. 3) of the transfer is attached to the working body 11, and the turning sprocket 14 to the pipework support 15. The presence of the transmission made in this way provides a constant orientation of the working body 11 (with the fork up) in the plane of rotation of the pipelayer.

The working body 11 has two arcuate cuts: the main one for pipe transfer and the auxiliary one placed at the top of one of the fork horns and designed to remove (break) the pipes from the racks when they are unloaded. The main cut-out has an axis of symmetry that coincides with the axis of symmetry of the fork, and the auxiliary one is located at the top of one of the horn of the fork.

Shelves 4 are made of three separate beams, each of which is a rigid lattice structure having an isosceles triangle in cross section. The front cross member 16 (Fig. 4), which lies at the base of the triangle, is the axis of rotation of the beam, the support 17 of which is rigidly connected to the foundation 18 of the rack.

The locking devices of the racks contain rack 19, inter-row gaskets 20, mount 21 and double-acting telescopic cylinders 22. At the opposite end of the bar is attached a rack 19 (Fig. 5) with a longitudinal slit for fastening inter-row spacers 20 in it. Changing the angle of inclination rack 4 is reached by means of hydraulic drive 5.

The interstitial gaskets 20 are at one end provided with a fastening unit 21 for attaching them to the rack 19 of the stack, and at the other end they have a stepped Z-shaped profile that is within the radius of action of the working body 11 of the pipelayer 3.

The interstitial gaskets 20, besides dividing the pipes into rows, still perform other very significant functions: with their free, stepped curved

With Z-ends, they remove the pipes laid by the pipelayers 3 when loading the racks, and when unloading they fix the position of the extreme (first from the bridge) pipe at exactly the specified distance required to grip this pipe by the working body of the pipelayer 3. The racks are attached to the front end of the rack. telescopic hydraulic cylinders 22 double action. The number of locking cylinders is selected one less from the estimated number of rows of pipes in the racks. The cylinders 22 are designed for

keeping the underlying rows of pipes at a distance greater than the range of the working body 11 of the pipelayer 3 when unloading the upper row, as well as for alternately unlocking the underlying rows of pipes after emptying the upper rows.

The installation works as follows.

Free end of tube 7, raised from

the wells are lowered onto the conveyor 2 of the first section of the bridge 1 and transferred from the vertical to the horizontal in a known manner. Moving along the conveyors 2, the pipe acts on the limit switch at a certain time.

6, which sends a pulse to disconnect the drives of the conveyors 2, and at the same time to turn on the drivers of the pipe layers 3, to drive them into rotational movement in the direction of movement

arrows (as viewed from the wellhead). At the same time, pipelayers 3 - (FIG. 4) seize pipe 11 with their working bodies 11 and, after one complete turn, move it from conveyors 2 to

racks on which the tube, due to a pre-established slope, rolls down to the stop.

The number of pipes laid in this way on racks in one row depends on

on the length of the racks' beams and on the diameter of the pipes, and the extreme (first from the bridge) pipe should not interfere with the operation of the hydraulic cylinder.

After filling the first (lower) row of pipes, install the inter-row gaskets 20 (Fig. 5), secure them in rack 19 of the rack 4, and continue to fill the second row, etc., until the pipes are lifted.

Before starting the pipe downhole, the following preparatory operations must be performed:

actuate hydraulic cylinder 22, as a result of which, when the racks angle of inclination (towards the gangway), the rows of pipes (except the upper one) are laid on the racks, they are held by hydraulic cylinder 22 at a distance greater than the working body 11

Claims (2)

pipelayer 3; change the slope of the racks 4 towards the receiving bridge 1 with the help of the hydraulic actuator 5. At the same time, the upper row of pipes moves a certain distance up to the stop of the extreme (first from the bridge) pipe on the curved ends of the interstitial gaskets 20, and thus this pipe appears in the range of the working bodies of the pipelayers 3. After the preparatory operations have been completed, pipelayers 3 are put into operation, which, rotating in the direction opposite to the clockwise movement, act by auxiliary cuts of the working bodies 11 on the ynyuyu (on bridges) and the pipe is removed (tear) with its rack and osvobodivshees takes place, due to the slope of the racks, following pipe. Removed from the racks, the pipe rolls under the action of its own weight into the main cutout of the working bodies II and moves the pipe layers 3 to the conveyors 2, moving in the direction of the wellhead. After unloading the top row of pipes, the free interstitial gaskets 20 are removed and the next row of pipes is unlocked using the hydraulic cylinder 22, causing the pipes of this row to move, rolling under their own weight along the slope of the racks up to the stop on the curved ends of the spacers and, thus, a second pipe extreme pipe will be in the range of the operating part of the transfer unit. The unloading of the underlying rows of pipes and their supply to the wellhead is carried out in accordance with the described sequence. Claim 1. Installation for moving pipes from the well to the racks and feeding them to the wellhead, including a receiving bridge with conveyors and pipe layers on the support, racks variable angle of inclination and locking devices containing inter-row gaskets, actuators, in order to increase the safety of work during the movement of pipes, pipe layers made in the form of p chaga and the working body connected with the lever with the help of a hinge and with the support of the pipelayer using a chain transmission with a gear ratio equal to one, the receiving bridge with cross slots in which the pipelayers are placed, and the locking devices of the racks are equipped with double action telescopic hydraulic cylinders for interacting with rows of pipes on the racks, and the ends of the melodure gaskets have a Z-shaped profile that is in the range of the working body of the pipelayer. 2. Installation under item 1, characterized in that the working body of the pipelayer is made in the form of an upward two-horned fork with two arc-shaped notches, one of which has an axis of symmetry that coincides with the axis of symmetry of the fork, and the other is located at the top of one of the horns of the fork . Sources of information taken into account in the examination 1. US patent number 4067457, cl. 214 / 2.5, publ. 01/10/78. 2. US patent number 3254776, cl. 214/25, publ. 07.06.66 (prototype). Fig