EA028915B1 - Method for simultaneous replacement of wellhead master valves under pressure (embodiments) and device for implementation thereof (embodiments) - Google Patents

Abstract

The invention is related to oil-and-gas producing industry. The essence of the vertical valve replacement method: on the upper flange of the swab valve, a hydraulic unit body with an inserted packoff assembly is mounted through an adapter, the packoff assembly including a packer with a sealing collar, a threaded sleeve and a clutch, a hollow mounting rod having a two-step outer surface, and a packing rod. Two posts of composite drive screws are connected on two diametrically opposite sides of the cross member in parallel with the axis of the valve and of the hydraulic unit body. The foundation plate is mounted on the posts providing alignment of the plate central bore with the axis of the hydraulic unit body and the valves by screwing a sliding stop nut on the hydraulic unit body until seating in the central bore of the foundation plate, and the posts are fixed on the plate. A hollow packer drive screw is screwed into the hydraulic unit body until it touches a step of the hollow mounting rod, composite drive screws are installed and fixed on the foundation plate, after which an additional plate is mounted on the composite drive screws until touching the end of the mounting rod. Screw couplings are fixed on the additional plate. After that, the failed central valve and the swab valve are opened in turn, and the presence of pressure in the inside cavity of the hydraulic unit body is checked. By rotating the packer drive screw, the hollow rod with the packing rod is entered in the bores of the valves to the depth of the packer seating. The sealing collar is mounted by means of the packing rod. After blocking of the wellhead valve line bores, excess pressure in the inside cavity of the hydraulic unit body is reduced. If there is no fluid leaks from the well through the packer, the mounting rod is fixed, and the plate is pressed by tightening the nuts, after which the hydraulic unit body with the valves joined to it is lifted above the wellhead equipment to mount a guard flange for maintaining the sealing state of the packer in the wellhead borehole. The hollow rod and the packing rod are disconnected and withdrawn from the failed valve borehole, after which the failed valve is replaced by a new one. Then a reverse process is performed ended by the packer withdrawal from the wellhead borehole, closure of the central valve and dismantling of the valve replacement device. The method of wing valve replacement differs from the first version by using trolleys running along a cargo monorail constituting a part of the composite drive screw for replacement of the upper master valve and the central valve to be replaced. The technical result consists in provision of a high-technology method for simultaneous replacement of failed vertical and wing borehole valves of the wellhead equipment.

Description

The invention relates to the oil and gas industry. The essence of the method of replacing the vertical valves: on the upper flange of the buffer valve is mounted through the adapter body hydraulic unit with inserted packer unit, including a packer with a sealing cuff, threaded sleeve and sleeve, hollow mounting rod, made with a two-step outer surface, and a packer rod. With two diametrically opposite sides of the cross, parallel to the axis of the valves and to the body of the hydraulic assembly, two racks of integral spindle screws are attached. The main plate is mounted on the racks to ensure alignment of the central channel of the plate with the axis of the hydraulic unit housing and the gate valves by screwing in the stop running nut on the hydraulic unit body prior to its landing in the central channel of the main plate, and fix the stands on the plate. The hollow screw of the packer movement is screwed into the housing of the hydraulic unit until it touches the stage of the hollow mounting rod, the composite spindle screws are installed and fixed on the main plate, after which the additional plate is installed on them until the end face of the mounting rod is touched. Fix the screw ties on an additional plate. After that, the central faulty and buffer valves are opened, and the presence of pressure in the internal cavity of the hydraulic unit housing is checked. By rotating the movement screw of the packer, the hollow rod with the packer rod is inserted into the through holes of the valves to the depth of the packer. Install the sealing cuff with a packing rod. After blocking the passage of the gushing fittings, the valve lines reduce the overpressure in the internal cavity of the hydraulic unit. In the absence of fluid flows from the well through the packer, the installation rod is fixed and pressed the plate with nuts, after which the body of the hydraulic unit with the valves attached to it is raised above the Christmas tree to install the safety flange to keep the tree in a sealed state. Disconnect and remove the hollow rod and the packer rod from the packer from the trunk of the faulty gate valve, and then replace the faulty valve with a new one. Carry out the reverse process until the packer withdraws from the stem of the tree armature, closes the central valve and removes the device to replace the valves. The method of replacing the side valves differs from the first variant in that to move the nadkorny and replaceable central valves use carts placed on the cargo monorail, which is part of the upper composite spindle. The technical result is to create a high-tech method for the simultaneous replacement of defective vertical and lateral stem valves of the Christmas tree.

028915 Β1

028915

The group of inventions relates to the oil and gas industry and is designed to change the faulty gate valves in the wellhead at the wellhead under pressure.

There is a known method of replacing valves of the gushing reinforcement under pressure [1], which includes the overlapping of the trunk of the gushing fittings below the replaceable valve with the help of a packer element of a sealing device.

The disadvantage of this method is the impossibility of the simultaneous replacement of several stem valves, in particular of the root and the highthick.

There is a known method of replacing the side valves of the gushing fittings under pressure [2] and a device for its implementation, in which they release two diametrically opposed studs securing the flanges of the cross, in their place are installed longer studs of the same diameter with which the console with runners is attached to the fixture , which is suspended to the gushing fittings on two rods, after which trolleys are mounted on the console's runners, to which the support plate of the device for changing valves and dismounting are suspended uemye valve. Then, the device itself is mounted on the valve block of the gushing fittings, for which the device flange is fastened with studs to the extreme lateral movement flange, and the device bars are attached with the help of studs to the flange of the fountain fixture crosspiece. Upon completion of mounting and mounting the device, alternately open both side gate valves and check for the presence of pressure in the internal cavity of the device using a pressure gauge mounted on a manometric tap. In a uniform rotation of the arms of the threaded bushings on the base plate, the rod with the packer at the end is inserted into the through holes of the valves to the calculated depth. Install the seal, blocking the passage of the Christmas tree and the line of valves. By opening the manometric tap, the pressure in the internal cavity is relieved to zero and ensure that no fluid flows from the well through the packer, then the faulty gate valve is disconnected from the Christmas tree and removed to a distance of the safety flange, reliably fixing it instead of the removed gate valve . Unscrewing the threaded sleeve from the packer, disconnect the device from the well and dismantle it. After replacing the faulty gate valve, the installation is performed in the reverse order.

The disadvantage of this technical solution is that it does not provide the necessary security when dismantling the block of valves, and also does not allow the replacement of valves on various sizes of Christmas trees.

The closest in technical essence to the claimed method is a method of simultaneous replacement of stem valves of the Christmas tree under pressure [3], in which they close the buffer valve of the Christmas tree and close to the trunk of the Christmas tree of string valves, dismantle the working strings of the Christmas tree, on the bottom flange of the transfer coil tube head and the top flange of the body of the tube head mount four pairs of patch brackets, forming four supports, on two opposite tie-down elongated spies Overlapping brackets install two swivel rollers of cable accessories, mount the sealing device housing on the upper flange of the buffer valve, assemble the assembly consisting of composite racks, mounting and packer rods, three traverse bars, centering racks and rods relative to each other, to the upper traverse attach with hooks, a puller attached to a lifting technique, with which the assembly is guided to the Christmas tree, add component racks to the mounting brackets device, held in a vertical position by three cross-beams located at different elevations relative to the body of the sealing device, determine the distance required to accommodate the packer element of the sealing device in the barrel of the tubular head of the Christmas tree below the replaceable stem valves, alternately from bottom to top open the stem valves of the Christmas tree, lowering the packer element of the sealing device into the trunk of the Christmas tree to the required distance, below replaceable stem valves, using the installation stem, fix the position of the packer element and the crossheads using nuts located on the composite racks above the crosshead, seal the barrel of the tubular head of the Christmas tree by rotating the packer rod clockwise using a nut by compressing the sealing cuffs of the packering element, reduce the excess pressure in the stem valves with the release of gas through the valve to atmospheric values, after technological exposure and in the absence of pressure in the stem valves screwing the lower flange nuts of the bottom replaceable stem valve and rotating the nuts on the composite racks raise the sealing device housing above the fountain armature to a height sufficient to install the safety fork to hold the packer element in the barrel head barrel in an airtight state, unscrew the cap nuts on the four brackets on the flange connection tubular head and remove the housing of the sealing device from the well with replaceable stem valves and buffer valve, for Renew the removed stem valves with new ones, and the housing of the sealing device with new stem valves is mounted on the tubular head, removing the safety fork, serves to assemble the composite racks, installation and packer rods at the wellhead, fix the assembly in overhead brackets, rotate the packer rod counter-clockwise weakening of the sealing of the packer element and its rise above the shi- 1 028915

using the lower stem gate valve, close the lower stem valve and dismantle the sealing device, install the previously removed studs in the places of the mounting brackets

The disadvantage of this method is that to change the valves, you must attract additional lifting tools, which complicates the process.

A device for changing valves on lateral branches of the gushing fittings under pressure [4] is known, which contains parallel main and additional base plates with axial channels connected to the main plate by means of guides by means of a detachable flange attachment to the fountain valves arranged in a central axial channel of the main base plate hollow rod mounted inside a packer with a drive rod, a stem sealing mechanism relative to the valve body with a flange, a sealing element, grubbuks oh, a pressure cap and a thrust nut installed in the base plate, the main support plate in the longitudinal plane, the rod and the drive shaft in the transverse one are made detachable, the guide screws are placed in the axial channels of the additional support plate, and the drive shaft is in its central axial channel.

However, this device has the disadvantage that it is intended to replace the valves on the side branches of the gushing fittings only if they have threads and only if the gaps in the faulty closed valve are insignificant and make it possible to connect the device. In addition, the design of the device is not sufficiently rigid due to the presence of a large number of detachable parts.

The closest in technical essence to the claimed device is a device for simultaneous replacement of stem valves of gushing fittings under pressure [5], comprising a housing with two stationary integral driving screws, two composite rods and one hollow mounting rod with a packing rod placed in it. The adjusting rod is made with the possibility of its vertical movement in the central opening of the housing, while the screws, rods and the adjusting stem are installed in traverses placed at different elevations relative to the housing; cuffs and nuts, on the other end - a packer rod with a heel, which engages with a compression drive of the sealing cuffs of the packer element, while the heel of the installation rod It is made with the ability to transfer force from the pressure of the downhole medium to the upper traverse, limited from moving by two nuts placed on the composite running screws, and the composite running screws and the composite rods are placed on supports consisting of several brackets.

However, the known device also has the disadvantage that it is necessary to attract additional lifting means for changing the valves, which complicates the process.

The task of the inventions is to obtain a technical result, which is expressed in the possibility of high-tech replacement of faulty valves, both vertical and horizontal, as well as the possibility of mounting the device to replace valves to different standard sizes of Christmas tree valves, in providing control of packer movement with rotation, in the presence of mechanical movement valves in the process of their dismantling and installation, in reducing the metal and in simplifying the design of the device.

The task is solved due to the fact that in the method of simultaneous replacement of vertical stem valves of gushing fittings under pressure on the upper flange of the buffer valve is mounted through the adapter hollow body of the hydraulic unit with inserted packer unit including the packer with sealing sleeve, threaded sleeve and sleeve, hollow mounting rod , made with a two-step outer surface, and a packer rod, with the hollow mounting rod set to a position in which the packer does not protrude R; they release the studs on the flanges of the cross and, in their place, install longer studs of the same diameter, with the help of which by means of sliding supports consisting of several brackets, two racks of the integrated spindle screws are connected from two diametrically opposite sides of the crosspiece; the main plate is mounted on the racks to ensure alignment of the central axial channel of the plate with the axis of the internal channel of the hydraulic unit housing and gate valves by screwing the axial guide nut onto the hydraulic unit body prior to its landing in the central axial channel of the main plate, and fix the racks on the plate with mounting screws; The hollow screw of the packer movement is screwed into the housing of the hydraulic unit until it touches the stage of the hollow mounting rod, the mounting screws on the racks are unscrewed and replaced with screw couplers of the composite chassis screws, and the composite chassis screws are fixed on the main plate, after which the additional plate using diametrically located peripheral axial channels until they touch the end of the installation rod, they are pressed with nuts mounted on the screw couplers above the additional plate, fix turnbuckles an extra plate; then open alternately the central faulty and buffer valves and check for the presence of pressure in the internal cavity of the hydraulic unit housing; rotating the knob of the screw for moving the packer, inserts a hollow mounting rod with a packing rod into the through holes of the valves to the depth of the packer; set the sealing cuff packer rod; after blocking the passage of the Christmas tree line

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a cuff with a packer rod; after blocking the passage of the gushing fittings of the valve line, reduce the excess pressure in the internal cavity of the hydraulic unit by releasing gas through the valve to an atmospheric value; in the absence of fluid flow from the well through the packer, fix the installation rod by moving the additional plate along the screw ties until it touches the end of the hollow rod and then press the plate with nuts, then unscrew the nuts of the lower flange of the central replaceable stem valve and rotate the stop running nut to raise the body of the hydraulic unit with gate valves connected to it above the fountain armature to a height sufficient to install a safety flange to hold the packer in the fountain valve trunk in a sealed condition; disconnect the hollow installation rod and the packer rod from the packer and remove them from the trunk of the central faulty gate valve; replace the faulty valve with a new one, insert the hollow installation rod and the packer rod into the barrel of the new valve and connect it to the packer by means of a threaded sleeve and coupling; check preload additional plate hollow mounting rod; remove the safety flange; rotation of the stop running nut moves the body with the packer displacement screw located in it and the valves attached to the crosspiece; securing the valves on the crosspiece, the packer releases the packer by closing the valve, and removes the packer from the stem of the Christmas tree; close the central valve; check tightness by opening the valve; making sure of the tightness of the connections, they dismantle the assemblies and parts used to replace the gate valves.

The packer fit can be measured with a tape measure mounted on the body of the hydraulic unit, according to the distance from the mark on the packer moving screw.

In addition, with the insertion of the installation rod with the packer into the body of the hydraulic assembly, the stem can be turned with a key mounted on it.

The task is also solved due to the fact that in the method of simultaneous replacement of the side stem valves of the Christmas tree under pressure, the hollow body of the hydraulic valve is mounted on the extreme flange of the nadka valve with a hollow body of the hydraulic unit with inserted packer, including a packer with sealing sleeve, a threaded sleeve and a sleeve, hollow mounting a rod made with a two-step outer surface and a packer rod, with the hollow mounting rod being set to a position in which the packer does not protrude Peter be; they release the studs on the flanges of the cross and in their place install longer studs of the same diameter, with the help of which by means of sliding supports consisting of several brackets, from two diametrically opposite sides of the cross, two racks of the composite spindle screws are attached parallel to the axis of the valves and the body of the hydraulic assembly cargo and sliding monorails; a cargo plate is installed on the cargo monorail to ensure alignment of the central axial channel of the plate with the axis of the internal channel of the hydraulic unit housing and valves by screwing in the stop nut to the body of the hydraulic unit before it sits in the central axial channel of the main plate, and fix the monorail on the plate with a mounting screw; install a sliding monorail in the main plate and fix it on the plate with a mounting screw; The hollow screw of the packer movement is screwed into the body of the hydraulic unit until it touches the stage of the hollow mounting rod, the mounting screws on the monorails are unscrewed and replaced with screw couplers of composite spindle screws and the composite spindle screws are fixed on the main plate, after which the screw plates are fitted with an additional plate diametrically located peripheral axial channels until the end face of the adjusting rod is touched, tightened with nuts mounted on the screw couplers behind the additional plate nd, and fix the screw ties on an additional plate; after that, alternately the root faulty and elevated gate valves are opened and the presence of pressure in the internal cavity of the hydraulic unit housing is checked; rotating the knob of the screw for moving the packer, inserts a hollow mounting rod with a packing rod into the through holes of the valves to the depth of the packer; set the sealing cuff packer rod; after blocking the passage of the gushing fittings of the valve line, reduce the excess pressure in the internal cavity of the hydraulic unit by releasing gas through the valve to an atmospheric value; in the absence of fluid flow from the well through the packer, fix the installation rod by moving the additional plate along the screw ties until it touches the end of the hollow rod and then press the additional plate with nuts, then install them on the upper monorail of the trolley, attach them to the flanges of the replaceable valves and to the body of the hydraulic unit , unscrew the nuts of the flange of the main faulty stem valve and by rotating the stop running nut move the body of the hydraulic unit with the valves connected to it from t ubnoy head a distance sufficient to install a safety flange to retain the packer in the wellbore tubing head in an airtight state; disconnecting the hollow installation rod and the packer rod from the packer and removing them from the trunk of the faulty main valve; replace the faulty gate valve with a new one, insert the hollow installation rod and the packer rod into the barrel of the new main valve and connect it to the packer by means of a threaded sleeve and coupling; check preload additional plate hollow mounting rod; remove the safety flange; rotation of the stop running nut moves the body with the screw of movement of the packer located in it and the attached valves by means of

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monorail carts to the crosspiece; securing the valve on the crosspiece, releasing the packer with the packer rod, closing the valve beforehand, and withdrawing the packer from the barrel of the tubular head; close the main valve; check the tightness by opening the valve and, having made sure of the tightness of the connections, dismantle the components and parts used to replace the gate valves.

The packer fit can be measured with a tape measure mounted on the body of the hydraulic unit, according to the distance from the mark on the packer moving screw.

In addition, with the insertion of the installation rod with the packer into the body of the hydraulic assembly, the stem can be turned with a key mounted on it.

In addition, the monorail with the carts mounted on it and the main plate can be hung by means of a lanyard to the fountain armature.

The task is also solved due to the fact that in the device for simultaneous replacement of vertical stem valves of the Christmas tree under pressure, including a hollow body of the hydraulic unit, made with the possibility of mounting to the flange of the buffer valve, the hollow mounting rod with the unpacking shaft placed in it, the packer unit for the overlap of the stem of the tree armature, including a packer with a sealing cuff, a threaded sleeve and a sleeve placed on one end of the hollow mounting rod and the packer rod, u and an additional plate with diametrically located peripheral channels for the passage of two composite spindle screws and central channels for the passage of the hydraulic unit housing and the other end of the packer rod, respectively, while the main plate is mounted on the composite spindle screws to ensure its rigid fixation, and the additional plate is installed on running screws with a possibility of movement on them and with ensuring deduction of a hollow installation rod due to restriction from movement by restrictive elements and nuts mounted on the spindle; the packer rod is provided with engagement with the compression drive of the sealing cuffs of the packer assembly, and the composite spindle screws are placed on the multi-arm supports that secure the lead screws to the stem crosspiece, according to the invention the hollow mounting rod is made with a two-step outer surface and is installed with a possibility of force transmission from the pressure of the downhole medium to the additional plate; contains a hollow screw moving packer installed in the housing and providing movement located therein a hollow mounting rod with a packer node in the axial direction due to the stop screw in a large degree hollow mounting rod; On the housing with the possibility of rotational-translational movement, a thrust sliding nut is installed, providing axial movement of the housing with a block of replaceable valves attached to it, with its stop through the bearing on the central axial channel of the main plate in the direction of the packer.

In addition, each composite lead screw may consist of two detachable parts: a screw tie and a stand, made with the possibility of connection between them in the peripheral axial channel of the main plate.

In addition, the device may contain measuring devices for determining the position of the hollow rod with the packer.

The task is also solved due to the fact that in the device for simultaneous replacement of the side stem valves of the Christmas tree under pressure, including a hollow body of the hydraulic unit, adapted to be attached to the flange of the snubbed valve, the hollow mounting rod with a packing rod placed in it, the overlap of the barrel of the tubular head, including a packer with a sealing cuff, a threaded sleeve and a sleeve placed at one end of the hollow mounting rod, the main and additional plates with diametrically located peripheral channels for the passage of two composite spindle screws and with central channels for the passage of the hydraulic unit housing and the packer rod, respectively; the main plate is mounted on the composite chassis screws to ensure its rigid fixation, and the additional plate is mounted on the composite chassis screws on them and ensuring the retention of the hollow mounting rod due to the restriction of movement of the two nuts mounted on the spindle screws; the packer rod is provided with engagement with the compression drive of the sealing cuffs of the packer assembly, and the composite spindle screws are placed on the multi-arm supports that secure the lead screws to the stem crosspiece, according to the invention the hollow mounting rod is made with a two-step outer surface and is installed with a possibility of force transmission from the pressure of the downhole medium to the additional plate; contains a hollow screw moving packer installed in the housing and providing movement located therein a hollow mounting rod with a packer node in the axial direction due to the stop screw in a large degree hollow mounting rod; on the housing with the possibility of rotational-translational movement, a thrust sliding nut is installed, providing axial movement of the housing with a block of replaceable valves attached to it with its stop through the bearing on the central axial channel of the main plate in the direction of the packer; a part of at least the upper composite spindle, connected to the supports, is made in the form of a monorail for installing carts on it, which ensure the movement of the hull and dismounted side 4 028915

Exit latches.

In addition, the device may contain measuring devices for determining the position of the hollow rod with the packer.

In addition, the device can be equipped with a means of suspending the monorail of the cargo and main plates to the Christmas tree.

The essence of the invention is illustrated by the following drawings: in FIG. 1 shows a device for replacing vertical stem valves in isometry; in fig. 2 is a vertical section of a device for replacing vertical valves; in fig. 3 is a view A of FIG. 2, in FIG. 4 - section of the hydraulic unit; in fig. 5 - hollow installation stem in isometric; in fig. 6 - packer unit in isometry; in fig. 7 hollow screw displacement packer in isometry; in fig. 8 - a device for replacing side gate valves in isometry; in fig. 9 is a longitudinal section of the device for replacing the side flaps mounted on the Christmas tree; in fig. 10 is a side view of a device for replacing side stem valves.

A device for implementing the method of simultaneous replacement of vertical stem valves of gushing fittings under pressure (Fig. 1 and 2) consists of a hollow body of a hydraulic unit 1 including a stuffing box 1.1, a nut 1.2, body 1.3, a chevron seal 1.4 for sealing the cavity between the body 1 and the valves , with an adapter 2 attached to it (Fig. 4); two fixed fixed spindle 3, consisting of the upper part - screw tie 3.1 and the lower part - rack 3.2; one hollow mounting rod 4 (Fig. 1, 2, 5), made with a stepped outer surface, while the upper stage 4.1 has a size in diameter less than the lower level 4.2; packer rod 5, placed in the inner cavity of the installation rod 4; a packer unit 6 (Fig. 6) containing a packer 6.1 with a rubber collar 6.2, a threaded bushing 6.3 and a coupling 6.4, and an installation rod 4 and a packer rod 5 installed at the end of the lower stage 4.2; a hollow screw 7 moving a packer (FIG. 7) installed in a housing and providing movement of a hollow mounting rod 4 located therein with a packer unit 6 in the axial direction due to the abutment of the screw 7 into the collar between the steps of the hollow mounting rod 4; main 8 and additional 9 plates, each of which contains a central axial channel 8.1, 9.1 and two peripheral diametrically located axial channels 8.2 and 9. 2 for putting on body 1 (channel 8.1), packer rod (channel 9.1) and composite spindle screws 3 accordingly, the main plate 8 is installed on the uprights 3.2 of the composite chassis screws 3, ensuring its rigid fixation (Fig. 8), and the additional plate 9 is installed on the screw fasteners 3.1 the chassis screws 3 can be moved along them and ensuring that the hollow mounting is held stem 4 due to the restriction from moving the two 9 mounted on the chassis screws 3.1 above the plate 9 by transferring the force from the pressure of the downhole medium to the additional plate 9. The housing 1 on the outer surface contains a threaded section on which the stop running nut 11 is installed with the possibility of supporting it through the bearing 12 on the shoulder 8.3 of the central axial channel 8.1 of the main plate 8 in the direction of the packer node 6 to provide axial movement of the housing 1 with a block of removable vertical stem bolts attached to it for example, two: the buffer 13 and the defective rod 14. The packer 5 is configured to engage with the drive compression of the sealing rubber cuffs 6.2 mounted in the inner cavity packer unit 6. Each pillar 3.2. composite running screws 3 by means of horizontal brackets 15 are placed on two supports (eyelets) 16 connected to the fountain armature with the possibility of adjusting the arrangement of racks 3.2 to the axis of the valves 13, 14. The device will hold the measuring devices that determine the position of the installation rod 4 with the packer node 6, which is a tape measure 17, fixed by means of a clamp to the valve on the nut 1.2 of the body of the hydraulic unit 1, and the disk 18 on the screw of movement of the packer 7, between which measure p Normal distance.

The main plate 8 and the additional plate 9 have clamps 19 for fixing screw ties 3.1, racks 3.2.

The device for simultaneous replacement of the side stem valves of the gushing fittings under pressure (Fig. 8-10) contains all those elements that are part of the device for replacing the vertical stem valves, with the only difference that they change the nadkorny 20 and faulty central 21 valves the upper composite spindle 3, connected to the supports, is made in the form of a cargo monorail 22 for mounting the carts 23 onto it, providing movement of the housing 1 and the side valves to be removed, and part of the lower composite spindle 3, connected to the supports, is made in the form of a sliding monorail 24. Freight monorail 22 is suspended on lanyards 25 on a fountain fixture. Sliding supports are made in the form of composite brackets 26. This allows the device to be mounted on any standard sizes of the Christmas tree. The main plate 8 and the additional plate 9 also have clamps 19 for fixing the screw ties 3.1, the cargo monorail 22 and the sliding monorail 24, with one of the ends of the screw ties being screwed into the monorails.

The method of simultaneous replacement of vertical stem valves of the Christmas tree under pressure is as follows.

On the upper flange of the buffer valve 13 mount the hollow body of the hydraulic unit 1 through the adapter 2 with the inserted packer unit 6, the hollow mounting rod 4 and the unpacking shaft 5,

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while the hollow mounting rod 4 is installed in a position in which the packer 6.1 does not protrude for adapter 2. Release studs on the flanks of the cross and in their place install longer studs of the same diameter, with the help of which by means of sliding supports including brackets 15, 16, connect to the crosspiece parallel to the axis of the buffer 13 and the faulty 14 valves, as well as the housing of the hydraulic unit 1 two racks 3.2. composite running screws 3. On racks 3.2. and the case of the hydraulic unit 1 put on the main plate 8 by means of diametrically located peripheral axial channels 8.2 and the center channel 8.1, respectively, and fix the racks on the plate with mounting screws ensuring the coaxiality of the central axial channel of the plate 8 with the axial channels of the hydraulic unit body 1 and the buffer 13 and the faulty 14 valves by screwing onto the threaded section of the outer surface of the housing 1 of the thrust nut 11 to its stop through the bearing 12 on the collar of the central axial channel main pl Ity in the direction of the packer 6.1, and carry out the screwing of the nut 11 to the entrance of the main plate 8 in the grooves of the racks 3.2 composite chassis screws 3. Fix the main plate 8 on the racks 3.2 mounting screws. The hollow screw of the packer 7 movement is screwed into the housing of the hydraulic unit 1 until it touches the stage 4.2 of the hollow mounting rod 4, ensuring that the screw face is located after screwing at the calculated distance from the front of the body 1. Unscrew the mounting screws on the racks 3.2 and change them to screw couplers 3.1 composite chassis screws 1 and fix the screw ties on the main plate 8 by the clamps 19, after which an additional plate 9 is installed on the screw ties 3.1 by means of diametrically located peripheral axial channels 9.2 until it touches the end face of the installation stem 4 and is pressed with nuts 10 mounted on screw ties 3.1 above the additional plate 9. Then open alternately faulty 14 and buffer 13 valves and check for pressure in the internal cavity of the hydraulic unit 1. Uniform rotation of the screw of the packer movement screw 7 insert the hollow rod 4 with the packer unit 5 into the through holes of the valves to the depth of the packer 6.1. The packer sealing cuff is installed with the unpacking shaft 5. The packer insertion depth is checked by measuring with a tape measure 17 fixed by a cuff on the valve nut 1.2 of the hydraulic unit housing 1, the distance to the disk 18 fixed on the packer moving screw 7. When inserting the hollow rod 4 with the packer, you can turn the stem key 27.

After blocking the passage of the gushing fittings of the valve line, the excess pressure in the internal cavity of the hydraulic unit 1 is reduced by the release of gas through the valve to an atmospheric value. In the absence of fluid flow from the well through the packer, the installation rod 5 is fixed by moving the additional plate 9 along the screw ties 3.1 until the end of the hollow rod 4 is touched and then pressed by the nuts 10, then the nuts of the lower flange of the central replaceable stem valve 11 are unscrewed raise the body of the hydraulic unit 1 above the fountain fitting to a height sufficient to install a safety flange (not shown in Fig.) to hold the packer in the barrel of the tubing head in an airtight seal standing. Disconnect the hollow mounting rod 4 and the packer 5 from the packer, replace the faulty valve with a new one, and then connect the packer 6.1 to the coupling 6.4 with a threaded sleeve. Check the preload additional plate 9 hollow stem 4, remove the safety flange. The rotation of the thrust nut 11 moves the valves 13,14 and the housing 1 with the screw of movement of the packer 7 located in it to the crosspiece. Fixing the valve on the cross, packer stem 5 release the packer, pre-closing the valve. Remove the packer from the valve stem, close it, check the tightness by opening the valve on the device. Convinced of the tightness of the connections, dismantle the components and parts of the device for changing the valves.

The method of simultaneous replacement of the side stem valves of the Christmas tree under pressure is as follows.

On the extreme flange, the percutaneous valve is mounted through an adapter 2 with a hollow body of a hydraulic unit 1 with a packer unit 6 inserted, a hollow mounting rod 4 made with a two-step outer surface, and a packing rod 5, with the hollow mounting rod 4 being set in a position in which the packer 6.1 does not stand for adapter 2. Release studs on the flanges of the cross and in their place install longer studs of the same diameter, with the help of which by means of sliding supports consisting of several brackets 26 , 27, with two diametrically opposite sides of the cross, parallel to the axis of the valves 20, 21 and the body of the hydraulic unit 1, connect two racks of composite spindle screws in the form of monorails 22, 24. A main plate 8 is installed on the cargo monorail 22 via a peripheral channel 8.2 and fixed with a mounting screw while the plate 8 is installed so that its central channel 8.1 is coaxial with the axis of the orifice of the housing of the hydraulic unit 1, valves 20 and 24. The coaxiality of the plate 8 is achieved by screwing the stop running nut 11 onto the body of the hydra vlicheskogo node 1. Screwing the nut 11 is carried to the plate 8 enter the cargo monorail groove 22. The angle between the plate 8 and the monorail 22 to be 90 ° ± 2 °. On the monorail sliding 24 move the slider to the entrance of the groove in the plate 8. The slider is fixed with two bolts to the beam of the monorail 24 and fixed with a nut to the transverse plate in the monorail. The plate 8 is fixed to the monorail 24 with a mounting screw.

Then, the screw of movement of the packer 7 is screwed into the housing of the hydraulic unit 1 until it touches the stage

- 6 028915

4.2 hollow mounting rod 4, while the end of the screw 7 should be at a distance of 990 mm from the end of the housing 1. On the installation rod 4 install the key 27 of the hollow rod 4.

Then unscrew the mounting screw on the cargo monorail 22 and replace it with a screw fastener 3.1. Next, unscrew the mounting screw on the monorail of the sliding 24 and change it to the second screw coupler 13. Then fix the monorails 22, 24 and screw fasteners 3.1 with the clamps 19.

On the monorail cargo 22 install cargo trucks 23, to which the housing 1 and the dismounted valves are suspended. In turn, the cargo monorail 22 is suspended from the lanyard 25 to the fountain valve.

An additional plate 9 is placed on the screw couplers 3.1 until the hollow mounting rod 4 is touched. The plate is pressed with 9 nuts 10 located on the screw ties 3.1 on the side opposite to the hollow mounting rod 4 and rests on the clamps 19.

Upon completion of the installation and mounting of the device, alternately open both valves 20, 21 and check for the presence of pressure in the internal cavity of the housing of the hydraulic unit 1 with a pressure gauge installed on it.

A uniform rotation of the handle 7 of the movement of the packer enters the hollow mounting rod 4 with the packer into the through holes of the valves to the calculated depth. The depth of fit of the packer is measured with a tape measure 16, installed by means of a collar on the nut 1.2 of the body of the hydraulic unit 1, according to the distance to the disk mounted on the screw 7 of the movement of the packer.

With the introduction of the stem 4 with the packer 6, it is possible to turn the stem 4 with the key 27.

The rubber cuff (sealer) 6.2 is installed using a packer rod 5. After blocking the passage of the flow-line fittings of the valve line by opening the valve, the pressure in the internal cavity is released to zero. Making sure there are no fluid flows from the well through the packer, fix the hollow mounting rod 4. To do this, move the additional plate 9 along the screw ties 3.1 until it touches its stem 4 and tighten it with nuts 10. Then install the carriage 23 on the upper monorail the flanges of the replaceable gate valves 20, 21 and to the body of the hydraulic unit 1, unscrew the nuts of the flange of the root faulty stem valve 21 and, by rotating the stop running nut 11, move them to a distance sufficient for installation in the resulting s Zor belay flange securing it firmly in place the removed valve. The movement of the valves 20, 21 and the elements of the device is carried out by the stop nut 11. Removing the threaded sleeve 6.3 of the clutch 6.4 from the packer 6.1, disconnect the hollow mounting rod 4 and the packer rod 5 from the packer and remove them from the shaft of the faulty valve 21. Replace the faulty valve with a new one enter the hollow mounting rod 4 and the packer rod 5 into the barrel of the new main valve and connect it to the packer by means of a threaded sleeve 6.3 and coupling 6.4. Check the preload additional plate 9 hollow mounting rod 4 and remove the safety flange. By rotating the thrust suspension nut 11, the body 1 is moved with the screw 7 located in it of the packer movement and the attached valves by means of 22 carts 23 mounted on the monorail to the crosspiece. Fixing the valve on the cross, packer rod 5 release the packer 6.1, after closing the valve, and remove the packer from the barrel tube head. Close the main valve, check the tightness by opening the valve and, making sure that the connections are tight, dismantle the components and parts used to replace the valves.

The device was tested in the workshop conditions of the Belarusian militarized detachment of the RUE "PA" Belorusneft "and in oil and gas fields of the Republic of Belarus.

Thus, the claimed invention allows high-tech simultaneous replacement of faulty stem valves, both vertical and lateral, under pressure through the use of such interacting elements of the device, such as a hollow mounting rod with a stepped outer surface and a hollow screw moving packer. The inventive method allows the replacement of valves without attracting additional lifting means, which simplifies the process and reduces the complexity of the work at the wellhead.

Information sources.

1. CI 18730 B1, IPC E21B 33/00, publ. 2001.07.10.

2. CI 2132926, IPC E21B 33/03, publ. 1999.07.10.

3. Ki 2405910, IPC E21B 33/03, publ. 2010.12.10.

4. 8I 1756533, IPC E21B 33/03, publ. 1992.08.23.

5. CI 2399748, IPC E21B 33/03, publ. 2010.09.20.

Claims (13)

CLAIM 1. The method of simultaneous replacement of vertical stem valves of gushing fittings under pressure, namely, that on the upper flange of the buffer valve is mounted through the adapter a hollow body of the hydraulic unit with inserted packing unit, including a packer with a sealing cuff, threaded sleeve and sleeve, hollow mounting rod, made with two 7 028915 foam outer surface, and a packer rod, with the hollow mounting rod set in a position in which the packer does not protrude for the adapter; they release the studs on the flanges of the cross and, in their place, install longer studs of the same diameter, with the help of which by means of sliding supports consisting of several brackets, two racks of the integrated spindle screws are connected from two diametrically opposite sides of the crosspiece; the main plate is mounted on the racks to ensure alignment of the central axial channel of the plate with the axis of the internal channel of the hydraulic unit housing and gate valves by screwing the axial guide nut onto the hydraulic unit body prior to its landing in the central axial channel of the main plate, and fix the racks on the plate with mounting screws; The hollow screw of the packer movement is screwed into the body of the hydraulic unit until it touches the stage of the hollow mounting rod, the mounting screws on the racks are unscrewed, they are replaced with screw couplers of composite lead screws and the composite lead screws are fixed on the main plate, after which an additional plate is installed on the screw couplers by means of diametrically located peripheral axial channels until they touch the end of the installation rod are pressed with nuts mounted on the screw ties above the additional plate, and iksiruyut turnbuckles an extra plate; then open alternately the central faulty and buffer valves and check for the presence of pressure in the internal cavity of the hydraulic unit housing; rotating the knob of the screw for moving the packer, inserts a hollow mounting rod with a packing rod into the through holes of the valves to the depth of the packer; set the sealing cuff packer rod; after blocking the passage of the gushing fittings of the valve line, reduce the excess pressure in the internal cavity of the hydraulic unit by releasing gas through the valve to an atmospheric value; in the absence of fluid flow from the well through the packer, fix the installation rod by moving the additional plate along the screw ties until it touches the end of the hollow rod and then press the plate with nuts, then unscrew the nuts of the lower flange of the central replaceable stem valve and rotate the stop running nut to raise the body of the hydraulic unit with gate valves connected to it above the fountain armature to a height sufficient to install a safety flange to hold the packer in the fountain valve trunk in a sealed condition; disconnect the hollow installation rod and the packer rod from the packer and remove them from the trunk of the central faulty gate valve; replace the faulty valve with a new one, insert the hollow installation rod and the packer rod into the barrel of the new valve and connect it to the packer by means of a threaded sleeve and coupling; check preload additional plate hollow mounting rod; remove the safety flange; rotation of the stop running nut moves the body with the packer displacement screw located in it and the valves attached to the crosspiece; securing the valves on the crosspiece, the packer releases the packer by closing the valve, and removes the packer from the stem of the Christmas tree; close the central valve; check tightness by opening the valve; making sure of the tightness of the connections, they dismantle the assemblies and parts used to replace the gate valves. 2. The method according to claim 1, characterized in that the depth of landing of the packer is measured by a tape measure mounted on the body of the hydraulic unit, according to the distance from the mark on the screw of movement of the packer. 3. The method according to claim 2, characterized in that when inserting the adjusting rod with the packer into the housing of the hydraulic unit, the rod is turned with a key mounted on it. 4. Method for simultaneous replacement of side stem valves of gushing reinforcement under pressure, which consists in the fact that on the extreme flange of the snubbed gate valve the hollow body of the hydraulic unit with inserted packing unit, including the packer with sealing sleeve, threaded sleeve and sleeve, hollow mounting rod, is inserted through the adapter, made with a two-stage outer surface, and a packer rod, with the hollow mounting rod set to a position in which the packer does not protrude for the adapter; they release the studs on the flanges of the cross and in their place install longer studs of the same diameter, with the help of which by means of sliding supports consisting of several brackets, from two diametrically opposite sides of the cross, two racks of the composite spindle screws are attached parallel to the axis of the valves and the body of the hydraulic assembly cargo and sliding monorails; a cargo plate is installed on the cargo monorail to ensure alignment of the central axial channel of the plate with the axis of the internal channel of the hydraulic unit housing and valves by screwing in the stop nut to the body of the hydraulic unit before it sits in the central axial channel of the main plate, and fix the monorail on the plate with a mounting screw; install a sliding monorail in the main plate and fix it on the plate with a mounting screw; The hollow screw of the packer movement is screwed into the housing of the hydraulic unit until it touches the stage of the hollow mounting rod, the mounting screws on the monorails are unscrewed, replaced with screw couplers of composite chassis screws, and the composite chassis screws are fixed on the main plate, after which the additional plates are screwed onto diametrically located peripheral axial channels until they touch the end of the installation stem, are pressed with nuts mounted on the screw ties behind the additional plate , and fix the screw ties on an additional plate; after that open - 8 028915 alternately, the root faulty and elevated gate valves and check for the presence of pressure in the internal cavity of the hydraulic unit housing; rotating the knob of the screw for moving the packer, inserts a hollow mounting rod with a packing rod into the through holes of the valves to the depth of the packer; set the sealing cuff packer rod; after blocking the passage of the gushing fittings of the valve line, reduce the excess pressure in the internal cavity of the hydraulic unit by releasing gas through the valve to an atmospheric value; in the absence of fluid flow from the well through the packer, fix the installation rod by moving the additional plate along the screw ties until it touches the end of the hollow rod and then press the additional plate with nuts, then install them on the upper monorail of the trolley, attach them to the flanges of the replaceable valves and to the body of the hydraulic unit , unscrew the nuts of the flange of the main faulty stem valve and by rotating the stop running nut move the body of the hydraulic unit with the valves connected to it from t ubnoy head a distance sufficient to install a safety flange to retain the packer in the wellbore tubing head in an airtight state; disconnecting the hollow installation rod and the packer rod from the packer and removing them from the trunk of the faulty main valve; replace the faulty gate valve with a new one, insert the hollow installation rod and the packer rod into the barrel of the new main valve and connect it to the packer by means of a threaded sleeve and coupling; check preload additional plate hollow mounting rod; remove the safety flange; rotation of the stop running nut moves the body with the packer displacement screw located in it and the attached valves through trolleys mounted on the crosspiece; securing the valve on the crosspiece, releasing the packer with the packer rod, closing the valve beforehand, and withdrawing the packer from the barrel of the tubular head; close the main valve; check the tightness by opening the valve and, having made sure of the tightness of the connections, dismantle the components and parts used to replace the gate valves. 5. The method according to claim 4, characterized in that the depth of the packer is measured by a tape measure mounted on the body of the hydraulic unit, according to the distance from the mark on the screw of movement of the packer. 6. The method according to claim 4, characterized in that when inserting the adjusting rod with the packer into the housing of the hydraulic unit, the rod is turned with a key mounted on it. 7. The method according to claim 4, characterized in that the monorail of the cargo and the main plate are suspended by means of a lanyard to a fountain fixture. 8. A device for simultaneous replacement of vertical stem valves of gushing fittings under pressure, including a hollow body of a hydraulic unit, adapted to be fixed to the flange of a buffer valve, a hollow mounting rod with a unpacking shaft disposed in it, a packer unit for blocking the trunk of a gated fittings, including a packer sealing sleeve, threaded sleeve and sleeve, placed on one end of the hollow mounting rod and packerier rod, the main and additional plates with diametrically located peripheral channels for the passage of two composite spindle screws and central channels for the passage of the hydraulic unit and the other end of the packer rod, respectively, with the main plate mounted on composite spindle screws ensuring its rigid fixation, and the additional plate mounted on the spindle screws can be moved on them and to ensure the retention of the hollow mounting rod due to the restriction of the movement of the restrictive elements and mounted on the spindle nuts ; the packer rod is made to ensure engagement with the compression drive of the sealing cuffs of the packer unit, and the composite spindle screws are placed on the support consisting of several brackets, providing fastening of the screw screws on the stem crosspiece, characterized in that the hollow mounting rod is made with a two-step outer surface and is installed with transfer of force from the pressure of the downhole medium to the additional plate; contains a hollow screw moving packer installed in the housing and providing movement located therein a hollow mounting rod with a packer node in the axial direction due to the stop screw in a large degree hollow mounting rod; On the housing with the possibility of rotational-translational movement, a thrust sliding nut is installed, providing axial movement of the housing with a block of replaceable valves attached to it, with its stop through the bearing on the central axial channel of the main plate in the direction of the packer. 9. The device according to claim 8, characterized in that each composite spindle screw consists of two detachable parts: a screw tie and a rack, which are made to be able to connect with each other in the peripheral axial channel of the main plate. 10. The device according to claim 8, characterized in that the device contains measuring devices that determine the position of the hollow rod with the packer relative to the body of the hydraulic unit. 11. Device for simultaneous replacement of side stem valves of gushing fittings under pressure, including a hollow body of a hydraulic unit, adapted to be attached to the flange of the nadkoe valve, a hollow mounting rod with a packer stem placed in it, a packer unit for closing the barrel of a tubular head, including a packer sealing sleeve, threaded sleeve and sleeve, placed on one end of the hollow mounting rod, the main and - 9 028915 an additional plate with diametrically located peripheral channels for the passage of two composite spindle screws and central channels for the passage of the hydraulic unit housing and the packer rod, respectively, with the main plate mounted on the composite spindle screws to ensure its rigid fixation, and the additional plate mounted on the composite spindle screws with the ability to move on them and ensuring the retention of the hollow installation rod due to the restriction from moving the two mounted on the ho screw nuts; the packer rod is made to ensure engagement with the compression drive of the sealing cuffs of the packer unit, and the composite spindle screws are placed on the support consisting of several brackets, providing fastening of the screw screws on the stem crosspiece, characterized in that the hollow mounting rod is made with a two-step outer surface and is installed with transfer of force from the pressure of the downhole medium to the additional plate; contains a hollow screw moving packer installed in the housing and providing movement located therein a hollow mounting rod with a packer node in the axial direction due to the stop screw in a large degree hollow mounting rod; on the housing with the possibility of rotational-translational movement, a thrust sliding nut is installed, providing axial movement of the housing with a block of replaceable valves attached to it with its stop through the bearing on the central axial channel of the main plate in the direction of the packer; a part of at least the upper composite spindle screw connected to the supports is made in the form of a monorail for mounting carriages on it, providing movement of the body and dismountable side valves. 12. The device according to claim 11, characterized in that it contains measuring devices for determining the position of the hollow rod with the packer relative to the body of the hydraulic unit. 13. The device according to claim 11, characterized in that it is equipped with a means of suspending the monorail of the cargo and the main plate to the Christmas tree.