RU2692851C1 - Ball valve with hydraulic drive - Google Patents

Abstract

FIELD: valve industry.

SUBSTANCE: invention relates to pipeline valves and is intended for rapid shutoff and sealing of in-pipe space of a drill string in case of oil and gas manifestations under high pressure during drilling of oil and gas wells, as well as to prevent discharge of drilling fluid left in swivel (upper power drive) and drill hose after drilling pump shutdown. Ball valve with hydraulic drive comprises housing, in which there are two balls installed in seats mounted in movable supports, and on the other side in contact with seats installed in fixed split bushings, drive of rotation of balls, connected to hydraulic drive mounted on said housing, and is characterized in that hydraulic drive is made in form of movable and fixed units, wherein the fixed assembly is a support mounted on said housing, fixed in axial direction by means of locking rings and provided with cages – internal, rigidly installed on said housing, and external, installed on internal cage, with possibility of rotation, and movable unit is a drive sleeve installed with possibility of movement along said housing by means of two cylinders arranged symmetrically relative to longitudinal axis, rods of which are fixed on drive sleeve in supports, and housing are connected to fixed unit-support. Driving shell is equipped with inner sleeve rigidly installed on said housing, and outer cartridge installed with possibility of rotation on inner sleeve, and in inner sleeve grooves there are three roller assemblies providing centering of inner sleeve relative to said housing, and two rails symmetrically located relative to longitudinal axis, fixed by means of fasteners and engaging with gears installed on hexahedrons, mounted in stops of crane balls rotation mechanism. Problem solved by the invention consists in improvement of reliability of operation of high-pressure BVHD, reduction of downtime of upper power drive during repair of hydraulically driven part, improvement of serviceability (points of lubrication are located outside the housing).

EFFECT: complete absence of problem of wear of seals working under high pressure and at high sliding speeds, as well as possibility of rapid replacement of failed parts and units of hydraulic drive of ball valve without dismantling from upper drive (without long stop of drilling operations) and its disassembly.

1 cl, 4 dwg

Description

Technical field

The invention relates to the field of pipeline valves and is designed for rapid overlap and sealing of the in-tube space of the drill string in the case of oil and gas under high pressure when drilling oil and gas wells, as well as to prevent the discharge of drilling mud remaining in the swivel (top power drive) and the drilling sleeve after off the mud pump.

Prior art

The ball valve (hereinafter referred to as CC) is a preventer valve of a ball type, full bore, with an internal bore. HQs are installed (screwed with a screw thread) on the output shaft of the swivel-reducer of the upper power drive (VSP) and it is its integral part. HK with hydraulic drive (hereinafter ShKGP) used in the drill string must ensure the operability of the device in harsh climatic conditions, including at ambient temperatures up to minus 55 ° C.

Known patent for utility model RU 168587, F15B 15/06, publ. 02.09.2017 Bull. No. 4 under the name "Drive hydraulic ball valve." It contains a housing in which a double-acting hydraulic cylinder is installed with a piston fitted with a rod and dividing the hydraulic cylinder cavity into piston and rod chambers, each of which is equipped with a fitting for supplying the working fluid under pressure in the hydraulic cylinder cavity. The piston is double-sided and fixed with the rod to the hydraulic actuator housing. The piston rod on both sides is made hollow, with the formation of two cavities inside the rod, separated by a deaf jumper located in the area of the piston under its central part. One cavity inside the rod is connected to the cavity of the piston chamber of the hydraulic cylinder using channels made in the wall of the rod in the area of the piston from the side of the piston chamber. Another cavity inside the rod is connected to the cavity of the rod chamber of the hydraulic cylinder by means of channels made in the wall of the rod in the area of the piston from the side of the rod chamber. At the ends of the rod are installed fittings for supplying the working fluid in the above-mentioned chambers of the hydraulic cylinder and its outlet. The hydraulic cylinder is made with the possibility of axial movement on the piston, and on its surface is placed a toothed rack for interaction with a gear placed in the housing of the hydraulic drive and mounted on an actuator driven by the unit. In the end walls of the housing are installed with the possibility of axial movement stops to limit the stroke of the cylinder.

Known ball valve with hydraulic actuator, representing a movable sleeve mounted on the body of the crane and rotating together with it with the possibility of axial movement along the body of the crane using two external cutting hydraulic cylinders mounted on fixed supports, and roller assemblies included in the grooves of the coupling or disk rotating together with the ball valve body (HongHua DQ225DBZ top drive operator's manual, p. 44-50), Internet ru.made-in-china.com> co_hongshengoil / product_Tore ... The sleeve has two symmetrical internal grooves ( copier), which are inserted in the rocking arms. When the sleeve moves up and down vertically, the rocking levers move from one side to the copiers, on the other hand, make a rotational movement relative to the ball valve body, turning the ball of the hydraulic drive section with the help of hexagons to close or open the in-tube space.

The closest analogue (prototype) is a ball valve with hydraulic actuator of ABA Hydraulic Systems JSC, St. Petersburg, Passport SHKGP LG VSP-225.080.000-01PS, 2011, Internet hvdrosvstem.ru. It contains the housing of the CC, in which two balls are installed in the saddles. Saddles are installed in movable bearings, sealed with rings and pressed to the balls with the help of springs. On the opposite side, the balls are in contact with the saddles installed in the fixed split sleeves, sealed with rings. Balls can be rotated 90 ° and open or close the inner hole of the crane. To prevent contamination of the hydraulic drive with drilling mud and other operating materials, components of the hydraulic drive are located inside the housing. Hydraulic ball valve is a fixed unit-hydropanel mounted on the body of the ball valve and secured with a lock-radiator from rotation, and a mobile unit-hydropanel upper, middle and lower, the upper and lower cover, mounted, fixed on the body of the ball valve and rotating with him. Two drive rails, moving inside the movable unit along the axis of rotation with the help of two symmetrically located relative to the longitudinal axis of the pistons, rotate gears with internal hexagonal holes. A pressure of 100 bar in the piston areas is created by the working fluid supplied to the stationary hydraulic panel through oil ring grooves connected to axial oil channels in the moving assembly. The rotation of the balls is carried out with the help of two hexagons connected to the stops through the sleeves with an internal hexagon from the internal hydraulic actuator.

The disadvantages of the prototype include low reliability and low maintainability. As the operating experience has shown, these hydraulically actuated ball valves cannot provide high reliability. This is due to the fact that the annular seals in the grooves of the stationary unit due to sliding over the surface of the ball valve body with a high circumferential linear velocity under a pressure of 100 bar wear out quickly, begin to flow and reduce the working pressure.

For the same reason, there is an intensive wear of the mechanical seal between the fixed and moving parts of the ball valve. Any replacement of seals, including repair of piston seals, is accompanied by the need to stop the upper power drive, screw the ball valve off the drive, deliver it from the field and disassemble it in a specialized production service base.

DISCLOSURE OF INVENTION

The problem, which has been solved by the invention, is to increase the reliability of the high-pressure gage unit, to reduce the downtime of the upper actuator when repairing the hydraulic drive part, and to improve the serviceability (lubrication points are outside the housing).

The technical result is the complete absence of the problem of wear of seals working under high pressure and at high sliding speeds, as well as the possibility of prompt replacement of the defective parts and assemblies of the hydraulic ball valve without dismantling from the top drive (without a long stop of drilling operations) and disassembly.

The tasks are solved as follows. The ball valve is hydraulically actuated, contains a housing in which two balls are mounted in the saddles mounted in movable bearings, and on the other hand in contact with the saddles mounted in the stationary split bushings, the drive of the balls connected to the hydraulic actuator mounted on the above the housing and it is different that the hydraulic drive is made in the form of a movable and fixed assemblies, moreover, the fixed assembly is a support mounted on the said housing fixed in the axial direction by means of one hundred ring rings, and provided with clips - inner, rigidly mounted on said housing, and outer, mounted on inner race, rotatably, and the movable assembly - is a drive sleeve mounted to move along said housing by means of two symmetrically located relatively longitudinal axles, hydraulic cylinders, the rods of which are fixed on the drive sleeve in the supports, and the body connected to a fixed node - a support. The drive sleeve is provided with an inner sleeve rigidly mounted on said housing, and an outer sleeve mounted for rotation on the inner sleeve, and three roller assemblies are installed in the grooves of the inner sleeve, ensuring the centering of the inner sleeve relative to the said housing, and two symmetrically located relative to the longitudinal axis slats fixed by fasteners and engaged with gears mounted on hexagons mounted in the mechanism stops; that ball valves.

The essence of the invention is that the cylinders acting on the drive rails with hexagonal holes are not made inside the rotating assemblies, but outside on the non-rotating parts of the hydraulic drive.

A specific example

The invention is illustrated by drawings.

In fig. 1 shows a general view of a hydraulically actuated ball valve in isometry;

in fig. 2a is a longitudinal section of the QS design; in Fig. 2 6, section A-A fig. 2a;

in fig. 3a is a side view of the SHKGP, in fig. 3b - section A-A fig. 3a, in fig. 3c - end view and section BB;

in fig. 4a and b show a general view of the SHKGP in the open and closed positions, in fig. 4c - section A-A fig. 4b.

The SHKGP contains a ball valve and hydraulic actuator (Fig. 1). The ball valve consists of a body 1 (Fig. 2), two balls 2 installed in the saddles 3 and 4. The saddles 3 are installed in movable supports, sealed by rings 5, 6 and tucked into the balls 2 by means of springs 7. On the opposite side are balls 2 in contact with the seat 4, installed in the fixed split sleeve 8, fixed by rings 9, 10 and sealed by rings 11, 12. Balls of the crane can be rotated 90 ° and open or close the inner hole of the crane. The drive rotation of the balls 2 is carried out using keys 13 connected to the lugs 14 with an internal hexagon from an external hydraulic actuator (upper node) or manual control (lower node). Fixation of the lugs 14 in the housing is performed by sleeves 15 with seals 16, 17. The ball is manually rotated with an Allen key inserted into the grooves of the support. The key is included in the tool kit. The letters “O” and “Z” are applied on the body of the crane, which corresponds to the “Open” and “Closed” positions. The manual ball valve is located in front of the safety sub and is used as an additional crane or in the event that the hydraulic actuator section of the ball valve fails, as well as in the event of a power outage or in other situations.

In addition to the lock connection with the shaft of the swivel-reducer, on the body 1 of the ball valve there are external splines 18 for mounting the spline coupling (not shown in the figure) connecting the body 1 and the output shaft of the gearbox.

Structurally, the elimination of problems with seals is achieved by the fact that the hydraulic actuator of the ball valve is a fixed unit - support 19 (Fig. 3), mounted on the body of the ball valve and fixed in the axial direction using stop rings 20, and the movable unit - sleeve 21, moved along the ball valve 1 by means of two symmetrically located relative to the longitudinal axis of the hydraulic cylinders 22, the rods of which are fixed to the drive sleeve in the supports, and the housing connected to the fixed bearing.

The stationary assembly — the support 19 has an inner race 23, which is centered on the body of the ball valve 1, and rotates with it as the shaft of the swivel rotates. The outer race 24 is mounted on a ball bearing and is stationary, as is the inner race relative to the body of the ball valve in the axial direction. The key 25 locks the outer ring against the grip foot against rotation.

The drive sleeve has a movable inner sleeve 26 mounted on the body of the crane 1 and rotating with it, and the outer ring 27 mounted on a ball bearing on the inner sleeve (does not rotate).

In the inner sleeve, in the grooves, there are three roller assemblies 28 and two symmetrically positioned relative to the longitudinal axis of the rail 29, secured with screws. The rollers 30 provide the centering of the inner sleeve relative to the housing 1 with axial movements. The slats 29 engage with gears 31 mounted on hexagons 32 inserted into the stops of the mechanism for turning the balls of the crane.

To prevent rotation of the outer cage of the movable node 21, it has a key 33, which is included in the groove of the bracket 34, mounted on a fixed support 19.

HQ is closed (Fig. 4) in the extreme position of the drive sleeve when it touches the support 19 and is fixed relative to the body. To fix this position of the drive sleeve, five fixing units are used, distributed along the perimeter of the body and sleeve. To this end, five plugs are installed on the crane body, and five spring-loaded clamps 35 (Fig. 4) are installed on the sleeve body, which are included in the sleeve holes when the extreme position is reached.

The operation of the hydraulic ball valve is as follows.

Work ball valve with a manual drive.

The hand-operated ball valve opening / closing is provided by manually turning the ball with the hexagon wrench S16 from one extreme position “OPEN” to another extreme position “CLOSED” and vice versa. Control of the position of the ball is carried out visually by the marks on the body of the ball valve and the sleeve. If the longitudinal axis of the housing coincides with the axis of the sleeve - the ball valve is open. In case the body axis is perpendicular to the axis of the sleeve - the ball valve is closed.

Work hydraulics ball valve.

The opening of the ball valve is carried out by applying a control signal to the electromagnet (not shown in the figure). The drive sleeve of the ball valve moves to the “ball valve open” position. An inductive sensor is activated (not shown in the figure). After a few seconds, the control signal from the electromagnet is removed.

The closure of the ball valve is carried out by applying a control signal to the electromagnet (not shown in the figure). The drive sleeve of the ball valve moves to the “ball valve closed” position. An inductive sensor is activated (not shown in the figure). After a few seconds, the control signal from the electromagnet is removed.

The inventive version of the hydraulically actuated ball valve is structurally completed and ready to be put into operation, showing good results in reliability.

Claims (1)

A hydraulically actuated ball valve, comprising a housing in which two balls are mounted in saddles mounted in movable supports and on the other hand in contact with the saddles mounted in fixed split bushings, a rotational drive of the balls connected to the hydraulic actuator mounted on the above-mentioned housing , characterized in that the hydraulic actuator is made in the form of movable and fixed assemblies, with the fixed assembly being a support mounted on said housing rigidly mounted in the axial direction p means of locking rings and provided with clips - inner, rigidly mounted on said housing, and outer, mounted on inner race, rotatably, and the movable assembly is a drive sleeve mounted to move along said housing by means of two symmetrically located relative to the longitudinal axis of the hydraulic cylinders , the rods of which are fixed on the drive sleeve in the supports, and the housing is connected to the fixed assembly - a support, while the drive sleeve is provided with an internal a sleeve rigidly mounted on said housing and an outer ring mounted rotatably on the inner sleeve, with three roller assemblies in the grooves of the inner sleeve that center the inner sleeve relative to the said housing and two symmetrically located relative to the longitudinal axis of the rail fixed by means of fastening elements and meshing with gears mounted on hexagons mounted in the stops of the mechanism of rotation of the balls of the crane.

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