SU1448156A1 - Arrangement for replacing pipeline gate valves under pressure - Google Patents

Abstract

The invention relates to the technical means of operation of pipe fittings and can be used to replace out of order valves of discharge lines of the gushing drilling wells. The purpose of the invention is to expand the operational capabilities of the device by equipping it with an autonomous system for fastening temporary constipation.

Description

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element in the pipe. The device comprises a housing 1 with a flange 2 and a movable rod 3 mounted therein with an axial displacement drive consisting of a screw 4 and a nut 5 located in the lid b rotatably and limited axial movement within the height of the lid 6. From the flange 2 in The housing 1 has an equalization chamber 7 with a shut-off valve 9. At the end of the rod 3, there is a piston valve consisting of an elastic cuff 10 and a support tip 11. To fix the cuff 10 in the pipe, a cone 12 is attached to the rod, which interacts with the collet 13 on the surface which is connected by a thread 14 with a sleeve 15 mounted on the rod 3 by means of slots 16, the axial movement of which is limited by the stops 17. I Il.

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The invention relates to the technical means of operating pipe fittings and is intended to effect the replacement of out-of-date valves installed at the outlet of pipelines under pressure, such as valves of lateral flow lines of gushing drilling wells.

The aim of the invention is to expand the operational capabilities of the device by equipping it with an autonomous system for fastening a temporary closure element in a pipe.

The drawing shows a device for the replacement of pipe valve under pressure, the cut.

The device consists of a housing 1 with a flange 2 and a movable rod 3 coaxially mounted therein with an axial displacement drive comprising a screw pair comprising a screw 4 connected together with the stem 3 and a nut 5 freely mounted in the housing cover 6 rotation and limited axial movement within the height of the cover 6. On the side of the flange 2 in the housing 1, an equalization chamber 7 is made with a sealing element 8 at the point where the rod 3 is inserted into it and the shut-off valve 9. At the end of the rod 3 there is a piston valve The elastic cuff 10 and the support tip 11 are attached. To fix the cuff 10 in the overlapped pipe, a cone 12 is engaged on the rod on its reverse side and interacts with the surface of the collet 13, which is connected by thread 14 to the sleeve 15 mounted on the rod 3 by means of slots 16, The axial movement of which is limited by the stops 17 of the stem 3. The screw 4 and the nut 5 are equipped respectively with handwheels 18 and 19. - The valve body 21 with the gate valve 20 placed in it is connected by a flange 22 to the body 1 and to the pipe 23.

When the replaceable gate valve 20 is closed, the device with the flange 2 fully inserted inside the balancing chamber 7 with its flange 2 is fastened to the valve flange 22 by bolts and a sealing gasket, and then through an open valve 9 into the balancing chamber 7, air or liquid is injected to a pressure equal to the pressure in the pipe 23, close the valve 9 and open the gate of the valve 20. Holding the handwheel 18, the left handwheel of the handwheel 19 (it is stipulated that all screw pairs in the device are right) inserts the cuff 10, the support tip II, the cone 12 and the collet 13 into the tube 23. And the nut 5 rests on the cover 6, and around the screw 4, moves it inside the device, and the collet 13 due to friction against the inner surface of the pipe 23 enters it only after acting on the sleeve 15 of the stop 17 located on the side of the balancing chamber 7. Due to this, the collet 13 is not wedged by the cone 12 and elastically enters into pipe 23. After full input and the collets 13, in the tube, by reverse rotation of the handwheel 19, first move the nut 5 up to the stop into the body I, and then the screw 4 with the rod 3 up to the stop of the surface of the cone 12 to the surface of the collet 13 that mates with it. rod 3, which results in compression of the cuff 10 by the surfaces of the support tip 11 and the cone 12 and tight pressing it to the inner surface of the pipe 23. Conical 12 is wedged into the collet 3, which is inserted into the pipe body by grooves. Subsequently, when opening the valve 9 of the balancing chamber 7, the pressure in it is relieved, and the pressure inside the pipe 23 due to the possibility of the stroke of the rod 3 to the stroke of the nut 5 in the cavity of the lid 6 additionally creates the necessary force to compress the cuff 10 and wedge the collet 13.

After fixing the cuff 10 in the pipe 23, they remove the handwheels 18 and 19, the cover b, screw the nut 5 off the screw 4 and unscrew the fastening bolts of the flange 2 of the housing 1 to the flange 22 of the valve, remove the housing 1 from the rod 3, and then unscrew the fastening bolts of the valve to the pipe 23, remove the valve, installed in its place and crepe bolts new.

On the rod 3 put the device body 1 and bolted its flange 2 to the flange of the new valve. On the screw 4 wind the nut 5, fasten t to the body 1

11 in the equalization chamber 7, then close the gate valve, opening the valve 9 relieve the pressure in the equalization chamber 7 and disconnect the device from the valve.

Claims (1)

Invention Formula A device for replacing pipe valves under pressure, comprising a housing 10 with a flange for connecting to the housing of the replaceable valve, an equalizing chamber and a rod mounted in the housing with its axial movement and a piston gate located at the end the cover 6 and the shaft 18 and 19 are installed in place of the rod-15 equipped with a fixation unit; again, the valve 9 is pumped through and driven by this node into the equalization chamber 7 so that, in order to expand the operation, gas or liquid equal opportunities, the fixing unit pressure in the pipe 23, and the rotation of the bolt-gate is made in the form of an internal chuck 19 to the left until it stops the nut 5 in the roof grip with a spacer cone, I will spawn 6 and then move the screw 4 and the stem 20 with a coaxial coaxial shaft 20 3 inwards, pushing out with 12 of the collet 13, the possibility of limited axial movement, the drive of the fixation unit is made in the form of a sleeve coaxially mounted on the rod and the spline associated with it subsequently fixing such a position by rotating the handwheel 18 to the right until the sleeve 15 is screwed in while This is in the collet 13 and sliding along the g joint, and with the collet - threaded. rod 3 at the splines J6, will not reach the upper stop 17. At the end of this operation, holding the handwheel 18 and turning the handwheel 19 to the right until it stops against the nut 5 into the body 1 and further, the collet 13, the cone 12, the cuff 10 and the drive are fully inserted The axial movement of the rod is made in the form of a screw pair, one link of which is rigidly connected with the rod, and the other is installed in the housing so that it can be rotated and limited axial movement. 11 in the equalization chamber 7, then close the gate valve, opening the valve 9 relieve the pressure in the equalization chamber 7 and disconnect the device from the valve. the axial movement of the stem is made in the form of a screw pair, one link of which is rigidly connected with the stem, and the other is mounted in the housing for rotation and limited axial movement.