RU142773U1 - WELL MOUNT SECTIONAL DEVICE - Google Patents

Abstract

1. Sectional device of the binding of the wellhead, including a casing mounted on a conductor casing, equipped with flanges with holes for the studs, side channels, side flanges, a cylindrical vertical bore, pipe casing and tubing string suspensions made in the form of a wedge suspension or pipe holder with a seal, sealing cuffs, sealing rings, adapter, characterized in that the housing is detachable and consists of at least two sections - section and casing string and tubing string sections, coupled with a standard flange connection, the number of sections being determined by the number of casing strings, a vertical cylindrical bore hole is made of one standard size for all sections of the casing and corresponds to the standard size of the conductive casing strings, contains supporting sections in each section for suspension pipes and sealing cuffs; moreover, each section may have its own version of pipe suspension. 2. The device according to claim 1, characterized in that the pipe suspension can be made in the form of a sleeve pipe holder with vertical slots and a seal in the form of a sleeve with an elastomeric or metal ring or in the form of a one-piece sleeve pipe holder, on the body of which is an elastic element, the housing is equipped with locking elements pipe hangers. 3. The device according to claim 2, characterized in that the casing contains three sections, in one section there is a suspension of pipe pipes of the tubing string made in the form of a one-piece coupling pipe holder, on the body of which p

Description

The utility model relates to the oil and gas industry, namely, to devices for wellhead equipment, and can be used as equipment for tying wellheads in gas, gas condensate, and oil fields.

A known design of a column head containing a pedestal, a pipe element exiting the pedestal, a pipe head holder of the column head provided with a seal, impervious to liquids in the barrel of the pipe element, and a bypass channel connected to the barrel on the other side of the head. The channel diverts return flow during cementing of the casing string and has a seal at the junction with the pipe holder. The tubular suspension of the casing head is provided with a seal and has grooves for diverting the return flow during casing cementing. The seal available in the pipe holder seals the casing string. The holes in the pipe suspension connect the annular space and the space in the attachment zone with the channel. In one of the design modifications, there is a side channel with a check valve and an additional side channel with a valve (GB 1076763).

However, the device of this column head does not allow, in the event of an emergency, without dismantling the entire structure, to install a wedge suspension, since the body of the column head is made one-piece, as well as the load from the weight of the casing string and the tubing string is concentrated on one support the surface of the casing of the column head, which leads to the concentration of dangerous stresses in the material of the casing of the column head and reduces the margin of safety of the structure. In addition, this design is made with a bypass channel located outside the head of the head, providing circulation of the reverse flow during cementing of the casing, which increases the overall dimensions of the device.

Known column head containing a cylindrical body with a cylindrical vertical bore, with an inner conical surface, a cover, nozzles installed in through holes in the walls of the body, a wedge suspension made in the form of a sleeve cut into three sectors with an axial channel with a part of the outer surface made tapered and inner surface with teeth, elastic lower and upper cuffs, annular metal seal and studs with nuts inserted in evenly spaced zhnosti hole flange housing and cover. The column head is equipped with a packing follower with an axial channel mounted on the upper end of the cover, a sleeve installed inside the housing, a column flange screwed into the sleeve of the last pipe of the production string, the cover has an internal annular protrusion in the upper part, the wedge suspension is located inside the sleeve and has holes located uniformly around the circumference, on the outer cylindrical surface of the sleeve there is a cuff and a movable sleeve fixed on the sleeve, the outer conical surface of the sleeve is paired with the inner the outer surface of the case, the lower elastic sleeve is inserted into the cavity between the sleeve and the body, and an outer annular protrusion of the cover is installed on it, an annular metal seal is installed between the ends of the body and the cover, the upper sleeve has an outer conical surface and is inserted into the cavity between the sleeve of the last pipe of the production casing and the inner conical surface made in the cover, and the outer annular protrusion of the packing follower is mounted on it, the inner conical surface is made in the coupling, which mates wedge with a tapered surface of the wedge suspension, while in the through holes made in the cover, nozzles are installed (RU 2146000 C1).

However, this design does not allow the casing string and tubing string to be lowered in one installation of blowout preventer; during installation it requires the re-installation of blowout equipment, as it is made with a variable cylindrical vertical bore and casing flanges of different sizes, as a result of which it increases the complexity, in addition, the load from the weight of the casing string and tubing string is concentrated on one supporting surface of the housing column head, which leads to the concentration of dangerous stresses in the material of the body of the column head and reduces the margin of safety of the structure.

The objective of the utility model is the development of a device made with a compact detachable casing having a single cylindrical vertical bore and flanges of the same size, which allows the casing string and tubing string to be lowered in one installation of blowout equipment, which reduces installation complexity, rational load distribution by weight casing string and tubing string reducing the concentration of hazardous stresses in the corpus material sa, allowing in case of emergency, without dismantling the whole structure, set the wedge suspension.

The problem is solved by the fact that in the sectional device of the wellhead harness including the casing, mounted on the conductor casing, equipped with flanges with holes for the studs, side channels, side flanges, a cylindrical vertical bore, pipe casing hangers and tubing strings made in in the form of a wedge suspension or pipe holder with a seal, sealing cuffs, sealing rings, adapter, the housing is detachable and consists of at least two sections, casing sections and tubing string sections, coupled with a standard flange connection, the number of sections being determined by the number of casing strings, a vertical cylindrical bore hole is made of one standard size for all sections of the casing and corresponds to the standard size of the casing stitch, contains, in each section, supporting surfaces for pipe suspensions and sealing cuffs, with each section having its own version of pipe suspension can be installed.

The pipe suspension can be made in the form of a sleeve pipe holder with vertical slots and a seal in the form of a sleeve with an elastomeric or metal ring, or in the form of a solid sleeve pipe holder on the body of which an elastic element is located, the housing can be equipped with stopper elements for pipe suspensions.

The casing may contain three sections, in one section, the suspension of tubing strings of the tubing can be installed, made in the form of an integral sleeve pipe holder, on the body of which an elastic element is located, and in the other two sections, the casing string suspensions are installed, made either in the form of a sleeve a pipe holder with vertical slots and a seal in the form of a sleeve with an elastomeric or metal ring, either in the form of a wedge suspension, or in the form of a one-piece sleeve pipe holder.

The utility model is illustrated by the description and diagrams, which depict:

FIG. 1 - sectional device strapping wellhead.

FIG. 2 - sectional device for strapping the wellhead, a variant of the body with three sections, an arrangement with pipe suspensions in the form of a sleeve pipe holder with vertical slots in the sections of the casing string and an integral sleeve pipe holder in the section of the tubing string.

FIG. 3 - sectional device for strapping the wellhead, a variant of the casing with three sections, an arrangement with pipe suspensions in the form of wedge suspensions in sections of the casing string and a one-piece sleeve pipe holder in the section of the string of tubing.

FIG. 4 - sectional device for strapping the wellhead, arrangement with pipe suspensions in the form of a one-piece coupling pipe holder in the casing string section and in the tubing string string section.

The sectional device for strapping the wellhead comprises a housing 1 (Fig. 1, Fig. 2, Fig. 3) mounted on a casing string 2a (Fig. 1, Fig. 2, Fig. 3), the Housing 1 is equipped with side flanges 3 ( Fig. 2, Fig. 3), flanges 4 (Fig. 1) with holes 5 (Fig. 1) for the studs 6 (Fig. 1), side channels 7 (Fig. 1), a cylindrical vertical passage hole 8 (Fig. one). The housing 1 is made detachable and consists of a section 9 (Fig. 1, Fig. 2, Fig. 3) of the casing 2b (Fig. 1, Fig. 2, Fig. 3, Fig. 4) and section 10 (Fig. 1, Fig. 2, Fig. 3, Fig. 4) tubing string 11 (Fig. 1, Fig. 2, Fig. 3, Fig. 4) mated with a typical flange connection 12 (Fig. 1, Fig. 2) . The number of sections 9 can be increased and is determined by the number of casing strings 2b. The cylindrical vertical passage 8 is made of one standard size for section 9, 10 of the housing 1 and corresponds to the size of the conductor casing 2. In each section 9, 10, the cylindrical vertical passage 8 is equipped with supporting surfaces 13 (Fig. 1) for pipe suspension 14 (Fig. 1, Fig. 2, Fig. 3) casing string 2b, tubing string 11 and sealing collars 15 (Fig. 1, Fig. 2, Fig. 3). Each section 9, 10 can be installed its own version of the suspension of pipes 14 (Fig. 1, Fig. 2, Fig. 3). Suspension pipes 14 are made in the form of a wedge suspension 16 (Fig. 3) or a pipe holder 17 (Fig. 1, Fig. 2, Fig. 3) with a seal 18 (Fig. 1, Fig. 2, Fig. 3) and sealing cuffs 15 The flange connections 12 comprise o-rings 19 (FIG. 1, FIG. 2). An adapter 20 is mounted on the section 10 by means of a flange connection 12 (Fig. 1, Fig. 2, Fig. 3). The suspension of pipes 14 can be made in the form of a sleeve holder 21 (Fig. 2) with vertical slots 22 (Fig. 2) and a seal 18 in the form of a sleeve 23 (Fig. 2) with an elastomeric or metal ring 24 (Fig. 2), or in the form of an integral coupling tube holder 25 (Fig. 4) on the body 26 (Fig. 4) of which an elastic element 27 is located (Fig. 4), and the housing 1 can be equipped with locking elements 28 (Fig. 1, Fig. 2, Fig. 3, Fig. 4) of the pipe suspensions 14. The housing 1 of the device may contain three sections 9, 10, 29 (Fig. 2, Fig. 3), one section 10 of the tubing string 11 and two sections and 9 and 29 casing 2b. Moreover, in section 10, the suspension of pipes 14 can be installed in the form of a one-piece sleeve holder 25 on the body 26 of which an elastic element 27 is located, and in the other two sections 9 and 29 in the form of a sleeve holder 21 with vertical slots 22 and a seal 18 in the form of a sleeve 23 s elastomeric or metal ring 24. In addition, the device may contain three sections 9, 10, 29 of the housing 1, while in section 10, perhaps, the suspension of pipes 14 in the form of a one-piece sleeve pipe holder 25, and in the other two sections 9 and 29 in wedge suspension 16.

Sectional device strapping wellhead is used as follows.

Sections 9, 10 are connected by means of a standard flange connection 12, using studs 6 passed through holes 5, having previously placed sealing rings 19 between flanges 4. Housing 1 is mounted on a conductive casing string 2a by means of a standard flange connection 12 and studs 6a, previously located between flanges 4 O-ring 19. In a cylindrical vertical bore 8 of the housing 1 of section 9 on the supporting surface 13 install a pipe suspension 14 made in the form of a wedge suspension 16 or pipe holder 17 with a seal 18 and sealing cuffs 15, in which the casing 2b is fixed. In a cylindrical vertical passage 8 of the housing 1 of the section 10 of the tubing string 11, the pipe suspension 14 is mounted in the form of a wedge suspension 16 or a pipe holder 17 with a seal 18 and sealing cuffs 15, in which the tubing string 11 is fixed In this case, the load from the weight of the casing 2b is distributed on the supporting surface 13 of the section 9, and the load from the weight of the casing 11 is distributed on the supporting surface 13 of the section 10. On the section 10 in the middle Using a typical flange connection 12, the adapter 20 is fixed, having previously placed a sealing ring 19 between the flanges 4. To fix the pipe suspensions 14, the locking elements 28 are installed.

The device housing 1 containing three sections 9, 10, 29, is also connected before installation by means of a standard flange connection 12, using studs 6 passed through holes 5, having previously placed sealing rings 19 between the flanges 4. Install blowout control equipment, and pipelines are attached to the side flanges 3 ( not shown in the diagram). The casing 2b and the tubing string 11 are lowered. For this purpose, the housing 1 is mounted on a conductive casing 2a by means of a standard flange connection 12 and studs 6. In a cylindrical vertical passage 8 of the housing 1 of section 29, a pipe suspension 14 is mounted on the supporting surface 13, in the form of a sleeve holder 21 with vertical slots 22 and a seal 18 in the form of a sleeve 23 with an elastomeric or metal ring 24 in which the casing 2b is fixed. Then, in the cylindrical vertical passage 8 of the housing 1 of section 9, a pipe suspension 14 is mounted on the supporting surface 13 in the form of a sleeve holder 21 with vertical slots 22 and a seal 18 in the form of a sleeve 23 with an elastomeric or metal ring 24 in which the casing 2b is fixed. Next, in the cylindrical vertical passage 8 of the housing 1 of the section 10 of the tubing string 11, the pipe suspension 14 is mounted as a solid pipe sleeve 25 on the body 26 of which an elastic element 27 is located. In addition, the suspension can be installed in section 10 pipes 14 in the form of a one-piece sleeve pipe holder 25, and in the other two sections 9 and 29 in the form of a wedge suspension 16.

In the event of an emergency, two of the sections 9, 10, 29 of the housing 1 are separated by disconnecting a typical flange connection 12, and a wedge suspension 16 and a seal 18 are fixed to the support surface 13 of the central vertical passage bore 8 and the tubing string 11 or casing string is fixed 2b.

Claims (3)

1. Sectional device of the binding of the wellhead, including a casing mounted on a conductor casing, equipped with flanges with holes for the studs, side channels, side flanges, a cylindrical vertical bore, pipe casing and tubing string suspensions made in the form of a wedge suspension or pipe holder with a seal, sealing cuffs, sealing rings, adapter, characterized in that the housing is detachable and consists of at least two sections - section and casing string and tubing string sections, coupled with a standard flange connection, the number of sections being determined by the number of casing strings, a vertical cylindrical bore hole is made of one standard size for all sections of the casing and corresponds to the standard size of the conductive casing strings, contains supporting sections in each section for suspension pipes and sealing cuffs, and each section can have its own version of pipe suspension. 2. The device according to claim 1, characterized in that the pipe suspension can be made in the form of a sleeve pipe holder with vertical slots and a seal in the form of a sleeve with an elastomeric or metal ring or in the form of a one-piece sleeve pipe holder, on the body of which an elastic element is located, the body is equipped locking elements of pipe suspensions. 3. The device according to claim 2, characterized in that the casing contains three sections, in one section the pipe suspension of the tubing string is installed, made in the form of a one-piece coupling pipe holder, on the body of which is an elastic element, and in two other sections pipe suspensions are installed casing string, made either in the form of a sleeve pipe holder with vertical slots and a seal in the form of a sleeve with an elastomeric or metal ring, or in the form of a wedge suspension, or in the form of a one-piece sleeve pipe holder.