RU2724699C1 - Universal device for turning-off or turning-up of wellhead accessories - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry, in particular to wellhead equipment, providing tight connection device and wellhead equipment of different standard sizes, non-standard (low) location of wellhead accessories, in particular when outflow of borehole products occurs. Universal device for turnout or turning-up of wellhead accessories comprises a branch pipe, mounting flange with peripheral holes for fastening bolts and side handles. Branch pipe in lower part is rigidly connected to mounting flange, upper part of branch pipe is equipped with head with external thread, and on inner side of branch pipe head there is a bore of hexagonal cross-section with possibility of mounting extension piece. Side handles are made in the form of mounting loops, which are rigidly connected to the branch pipe. In lower part branch pipe is equipped with radial expansion to mounting flange, on top of expansion there is a process recess, on which ring is fixed, in which there are uniformly circumferential radial holes for storage and transportation of attachment bolts. Peripheral holes of mounting flange are oval-shaped, and lower part of mounting flange is equipped with sealing cuff. Extension of universal device comprises branch pipe, and upper part of branch pipe is equipped with head with external thread, and inner side of branch pipe head is made hexagonal cross-section, and lower part is made from outside with hexagonal cross-section.

EFFECT: technical result consists in improvement of efficiency of turn and turn of wellhead equipment due to creation of device, which provides sufficient torque, providing "initiation" of a mouth crosspiece inside a coupling threaded connection due to the arising circumferential force, due to the device universality, providing strength, reliability and tightness of connection of device and wellhead equipment at closure of wellhead, simplification of design and its compactness.

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Description

The invention relates to the oil industry, in particular to wellhead equipment, providing a tight connection of the device and wellhead valves of different sizes, non-standard (understated) location of wellhead valves, in particular when an outflow of well products occurs.

A device is known for the inversion and flap of the column head, including a base mounted on the column head flange with holes for fasteners, a socket fixed to the base, an element for transmitting torque to the base and a drive for rotating the base (RU patent No. 2695907, IPC ЕВВ 19/00 ) The nest is made of two identical equal-angled corners, connected to each other by longitudinal edges by welding. The base consists of four identical strips having a cylindrical hole for fasteners at one end and a V-shaped cutout at the other ends, the inclined edges of which are located symmetrically with respect to the longitudinal axis of symmetry of the strip and at right angles to each other. The V-shaped cutout of the strip includes the sharp part of the nest, the inclined edges of this cutout are welded to the side walls of the nest. The base strips are connected to the flange of the column head using nuts and bolts / studs passed through the holes of the base and flange. In the internal cavity of the nest, formed by two angles, with the possibility of axial movement, the lower part of the element for transmitting torque to the base is installed. The specified element is made of a segment of a cylindrical pipe, the lower part of which is surrounded by four equal equal-angle corners, separated from each other by a right angle relative to the axis of the pipe segment. The longitudinal edges of these corners are welded to the outer side wall of the pipe section, and a flat flange is worn on top of the pipe section, which is fixed by welding to the upper ends of the four corners encircling the pipe section. An external conical thread is made at the upper end of the pipe segment, where a sleeve is wrapped with the corresponding thread to connect the device to the elevator. The drive for rotating the base is an overhead hydraulic wrench.

A device for the inversion and flap of the column head, including mounted on the flange of the column head base in the form of a disk with a central hole and concentric holes, a socket attached to the base, an element for transmitting torque to the base and a drive for rotating the base (patent RU No. 2678743, IPC Е21В 19/00). Concentrically located holes of the base are made in the amount of four and with a cylindrical wall. The base is connected to the flange of the column head using nuts and bolts or studs passed through concentrically located holes of the base and holes of the flange. The socket is made in the form of a cylinder with a coaxially arranged square section of the sample. The cylinder of the socket is installed in the central hole of the base and fixed to the base by welding. An element for transmitting torque to the base, made in the form of a segment of a square pipe, has a cylindrical ring welded on its upper end, the inner diameter of which is chosen to be larger than the diagonal of the inner square of the cross section of the segment of the square pipe, in the square selection of the cylinder with axial movement. The outer diameter of this ring is selected greater than the width of the outer wall of the segment of the square pipe. On the upper wall of the cylindrical ring is installed coaxially to a segment of a square pipe and a segment of a cylindrical pipe is fixed by welding. It has an external conical thread at the upper end, where a sleeve is wrapped with the corresponding thread to connect the device to the elevator. The drive for rotating the base is an overhead hydraulic wrench, used for screwing and unscrewing drill and tubing pipes. The proposed device simplifies the design by reducing the number of parts and the use of a suspended hydraulic key.

A device for the inversion and flap of the column head, comprising a base with concentrically arranged four holes and with a cylindrical wall (patent RU No. 2674591, IPC V25V 27/14). The base is connected to the flange of the column head using bolts or studs with nuts. A sleeve is mounted coaxially and motionlessly in the central hole of the base, the ends of which protrude on both sides of the base. A conical wall is made at the lower end of the side wall of the sleeve, expanding upward. A pipe segment is welded coaxially to the upper end of the sleeve, having an external conical thread at the upper end, onto which a sleeve with a corresponding thread is screwed to connect the device to the elevator. The drive for rotating the base is an overhead hydraulic wrench for screwing and unscrewing drill and tubing pipes. The technical result consists in simplifying the design of the device.

Known devices do not allow the flap and inversion of the wellhead to ensure a tight connection between the device and the wellhead, which is necessary to close the mouth when an outflow of well products occurs, and also include the flap and inversion of the crosspiece of the wellhead only one dimension. In practice, three dimensions of wellhead fittings are most often used: oversized (used in super-viscous oil (IOS) wells), standard and small-sized (installed in small diameter wells, production casing with a diameter of 114 mm or less). A distinctive feature of these wellhead fittings, in addition to size and performance, is the different arrangement of the axis of the stud holes for connecting the wellhead flange to the spider. And also devices are difficult to use because the design is prefabricated, various additional devices are required to perform the lapel and inversion of the wellhead fittings.

The closest in technical essence is a device for dismantling the wellhead crosspiece, containing a pipe, a mounting flange with peripheral holes for mounting bolts and side handles (patent RU No. 122429, IPC ЕВВ 33/03). The mounting flange is made in the form of a plate and has a square axial hole and side handles rigidly connected to the plate, and a parallelepiped-shaped tip is welded to the lower end of the universal pipe, having a square in the base that coincides with the square of the axial hole of the mounting plate.

The disadvantages of the known device are:

- firstly, the low efficiency of the implementation of the lapel and inversion of the wellhead valves with a tight connection between the device and the wellhead when closing the mouth in the process of the outflow of well products;

- secondly, not the universality of the device, because the device provides a lapel or inversion of the crosspiece of the wellhead reinforcement of only one dimension;

- thirdly, the complexity of the lapel or inversion of the wellhead the design is prefabricated; various additional devices are required during transportation, assembly and work on the well;

- fourthly, low strength and reliability, because the device is made up of components with a threaded connection that does not provide sufficient torque required to “straggle” the wellhead crosspiece inside the sleeve threaded connection due to the arising peripheral force.

The technical task of the proposal is to increase the efficiency of performing the flap and inversion of the wellhead fittings by creating a device that provides sufficient magnitude of torque, which allows the “mouthpiece” of the wellhead crosspiece to be inside the coupling threaded connection due to the circumferential force, due to the universality of the device, ensuring strength, reliability and tightness of the connection between the device and wellhead valves when closing the mouth, simplifying the design and its compactness.

The technical problem is solved by a universal device for the flap or inversion of wellhead valves, containing a pipe, a mounting flange with peripheral holes for mounting bolts and side handles.

New is that the pipe in the lower part is rigidly connected to the mounting flange, the upper part of the pipe is equipped with a head with an external thread, and the bore of the hexagonal section is made on the inside of the pipe head with the possibility of mounting an extension cord, the side handles are made in the form of mounting loops that are rigidly connected with a nozzle, and in the lower part the nozzle is equipped with radial expansion to the mounting flange, a technological sample is made on top of the expansion, on which a ring is fixed, in which the radial holes for the mounting bolts are arranged uniformly around the circumference, the peripheral holes of the mounting flange being oval and the lower part the mounting flange is equipped with a sealing collar.

It is also new that the extension of the universal device contains a pipe, the upper part of the pipe provided with a head with an external thread, and a bore of a hexagonal section is made on the inside of the head of the pipe, and the lower part is made of a hexagonal section from the outside.

In FIG. 1 shows a General view of a universal device for flap or inversion of wellhead fittings.

In FIG. 2 shows view A.

In FIG. 3 shows view B.

In FIG. 4 shows an extension cord.

A universal device for flap or inversion of wellhead fittings (Fig. 1) contains a pipe 1, a mounting flange 2 with peripheral holes 3 (Fig. 3) for fixing bolts 4 (Fig. 1) and side arms 5. The pipe 1 is rigidly connected to the bottom with a mounting flange, the upper part of the nozzle is equipped with a head 6 with an external thread 7, and a bore 8 (Fig. 2, 4) of a hexagonal section with the possibility of mounting an extension 9 (Fig. 1) is made on the inside of the nozzle head. The thread on the head of the device is designed for mounting a locking device (valve, gate valve), which is necessary when an oil and gas occurrence (spout) occurs. The bore of the hexagonal section ensures the strength of the connection, in contrast to the threaded ones, the speed of installation and the preservation of the transmission of rotational force from the hydraulic wrench drive used in the current repair of wells, without loss of power during the operations of turning or turning the wellhead valves. The side arms 5 (Fig. 1) are made in the form of mounting loops that are rigidly connected to a pipe, for example, by welding. Mounting loops 5 allow unloading and loading of the device, as well as the possibility of mounting on wellhead fittings without the use of a pipe elevator, and also taking into account the light weight, make manual installation (use the loops as handles). In the lower part, the nozzle is equipped with a radial extension 10 to the mounting flange 2 and rigidly connected to the nozzle and the cuff flange, a technological sample is made on top of the expansion, on which the technological ring 11 is rigidly fixed, in which the radial holes 12 (Fig. 2) are arranged uniformly around the circumference, with a diameter of providing the placement of the corresponding mounting mounting bolts 4 (Fig. 1). This placement of mounting bolts ensures the safety of the mounting bolts during transportation of the device, increases the productivity of the process of flap or inversion of wellhead fittings. The peripheral holes 3 (Fig. 3) of the mounting flange 2 (Fig. 1) are oval in shape, which allows the device to be mounted on various sizes of wellhead fittings. The lower part of the mounting flange is equipped with a pressed-in sealing cuff 13. The cuff is made with a width of 40 mm, which ensures the tightness of the connection of the device with wellhead fittings of various modifications. Tightness is achieved due to leakage of the sealing collar into the existing groove (under the sealing ring) of the wellhead reinforcement when fastening the device to the wellhead reinforcement with studs. Apply a sealing cuff, manufactured in accordance with TU 38.1051021-76. The extension cord 9 of the universal device contains a pipe 1 (Fig. 4), the upper part of the pipe provided with a head 6 with an external thread 7, and a bore 8 with a hexagonal section is made on the inside of the pipe head, and the lower part is made with a hexagonal section 14. The extensions provide the necessary adjustment the length (height) of the device during work, in the case of non-standard (understated) location of wellhead fittings.

All-metal design of a universal device for flap or inversion of wellhead fittings, the absence of threaded connections provides high strength and reliability during operation. The device has a high efficiency of performing a flap or inversion of the wellhead valves by creating sufficient torque to ensure “straggling” of the wellhead cross inside the threaded coupling due to the circumferential force, due to the universality of the device, ensuring the strength, reliability and tightness of the connection of the device and wellhead reinforcement when closing the mouth, simplifying the design and its compactness.

Universal device works as follows.

The universal device contains a pipe 1 and a mounting flange 2, made of all-metal. The upper part of the nozzle is equipped with a head 6 with an external thread 7, and a bore 8 of a hexagonal cross-section with the possibility of mounting an extension cord 9 is made on the inside of the nozzle head. If the length of the device is insufficient, it is possible to install extension cords in case of non-standard (understated) location of wellhead fittings (three extension cords are provided 0.5 m long). The extension of the universal device contains a pipe 1, the upper part of the pipe provided with a head 6 with an external thread 7, and a bore 8 of a hexagonal section is made on the inside of the head of the pipe, and the lower part of the extension pipe is made with a hexagonal section 14. After dismantling the faceplate (upper flange of the wellhead valve) the universal device is hooked with a cable over the mounting loops 5 (manual installation for the loop-handles is possible), then the device is installed on the flange of the crosshead of the wellhead fittings so that the peripheral holes on the mounting flange 2 of the device for bolts (studs) made oval 3 coincide with holes on the flange of the wellhead cross. The lower part of the mounting flange is equipped with a sealing collar 13.

Next, the device is lowered and the wellhead reinforcement is fastened with the pins with studs (fixing bolts) 4. The fixing bolts are placed in radial holes 12 located uniformly around the circumference on the process ring 11 located in the lower part of the pipe, on top of the radial extension 10, made up to the mounting flange 2 The lapel and inversion can be made with a hydraulic wrench (not shown in Fig.), The capture of which is installed on the device body, as well as manually by mounting a pipe wrench with an amplifier. After finishing the work, dismantle the device in the reverse order.

The proposal increases the efficiency of performing the flap and inversion of the wellhead fittings by creating a device that provides sufficient torque to ensure that the wellhead crosses are “strained” inside the sleeve threaded connection due to the circumferential force, due to the universality of the device, ensuring the strength, reliability and tightness of the connection of the device and wellhead reinforcement when closing the mouth. The device is universal in application, easy to manufacture, is compact during transportation and use, while improving the convenience of repair work, their quality and reduce lead time.

Claims (2)

1. A universal device for flap or inversion of wellhead valves, comprising a pipe, a mounting flange with peripheral holes for mounting bolts and side handles, characterized in that the pipe in the lower part is rigidly connected to the mounting flange, the upper part of the pipe is equipped with a head with an external thread, and on the inside of the nozzle head, a bore of a hexagonal section is made with the possibility of mounting an extension cord, the side handles are made in the form of mounting loops that are rigidly connected to the nozzle, and in the lower part of the nozzle is equipped with radial expansion to the mounting flange, technological sampling is performed on top of the extension, on which the ring is fixed in which the radial holes for the mounting bolts are arranged uniformly around the circumference, the peripheral holes of the mounting flange being oval and the lower part of the mounting flange provided with a sealing collar. 2. A universal device for flap or inversion of wellhead valves according to claim 1, characterized in that the extension of the universal device contains a pipe, the upper part of the pipe provided with a head with an external thread, and a bore of a hexagonal section is made on the inside of the pipe head, and the lower part is outside made by a hexagonal section.

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