RU2763190C1 - Tool for measuring the height of the casing hanger - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry and can be used during technological work in an underwater well. The tool for measuring the height of the casing hanger consists of a housing located in the upper part of the housing of the upper adapter, made with the possibility of attachment to the drill string. A removable spacer sleeve is installed in the lower part of the housing. The die piston moves when the pressure increases in the radial direction with the die attached to it. The die is made of soft material and contacts the inner surface of the casing string with the possibility of forming an imprint of the grooves of the inner profile of the column head on the die. Inside the housing there are valves with the possibility of applying pressure to the die piston and draining the liquid from the drill string.

EFFECT: reduction in the metal consumption of the tool and an increase in the efficiency of measuring the height of the installation of casing hangers.

3 cl, 2 dwg

Description

Technical field

The invention relates to the oil and gas industry and can be used in carrying out technological work in an underwater well.

Prior Art

From the existing state of the art, an indicator of the position of the tool in the well is known (SU patent No. 987084, published on January 17, 1983), containing a hollow cylinder with fixed contacts, inside of which a spring-loaded piston with a closing contact is placed, a signaling device connected to a fixed contact, equipped with an additional a hollow cylinder with a piston, the over-piston cavity of which is connected by means of a channel with the over-piston cavity of the cylinder with fixed contacts, while the over-piston cavities of both cylinders are filled with a dielectric liquid, and the diameters of the pistons are equal to each other.

The disadvantage of this device is that in this device there is no possibility of obtaining impressions of the grooves of the inner profile, which in turn does not improve the reliability and accuracy of checking the installation height of casing hanger housings.

The closest to the claimed technical solution is a method for determining the position of a technical pipe string installed in a conductor, and a controlling tool for it (RF patent No. body on the landing surface of the suspension of the technical string of pipes and partially unload the weight of the drill pipes on it, then the drill string of pipes is rotated until the spring-loaded clamps on the body of the control tool fall into the grooves made on the inner surface of the hanger of the technical string of pipes, and the split nut will come off the thrust thread of the control sleeve, while the rotation of the body of the controlling tool stops, and the guide, together with the cone, continues axial downward movement, pushing the dies apart and pressing the lead seals on them to the grooves on the surface of the jig to obtain impressions of the grooves.

The disadvantage of the prototype is that in order to measure the installation height of casing hanger housings with different diameters and profiles of the contact surfaces, it is necessary either to make a new tool, or to remake an existing tool, or to make a new tool with additional ledges on the outer diameter for different diameters of the casing hangers. , which leads to an increase in the dimensions of the tool and, ultimately, to an increase in the metal consumption of the product.

The essence of the invention

The problem solved by the present invention is the problem of reducing the metal consumption of a tool for measuring the installation height of casing hanger bodies of various diameters.

The technical results are a reduction in the metal consumption of the tool, the creation of a prefabricated tool design suitable for measuring the installation height of casing hanger housings of various diameters and various designs.

The technical results are achieved by the fact that the design of the tool provides for replaceable sleeves for different diameters of the casing, rings are installed in the replaceable sleeves, which, depending on the design of the casing head, can have a different profile.

Brief description of the drawings

The essence of the invention is illustrated by drawings.

Figure 1 shows a tool for measuring the height of the casing hangers, General view, section.

Figure 2 shows a tool for measuring the height of casing hangers according to RF patent No. 2701746 (published on 10/01/2019).

Detailed description of the invention

The following is one, but not the only version of the tool

The tool is part of the subsea casing head system tool kit and is designed to measure the height of casing hangers.

In FIG. 1 shows a tool for measuring the height of casing hangers, general view, section.

The tool consists of:

1 - plug;

2 - lower adapter;

3 - ring;

4 - spacer sleeve;

5 – die piston;

6 - die;

7 - screw;

8 - bushing;

9 – disk spring;

10, 12, 17, 19, 20, 21 - channels;

11, 18 - indicator valves;

13, 22 - plugs;

14 - top adapter;

15 - body;

16 - ball-valve.

Figure 1 shows a tool for measuring the height of the casing hangers, General view, section.

Depending on the size and number of installed casing hangers, the installation height of which must be controlled, an appropriate spacer sleeve 4 with a corresponding ring 3 is installed on the body 15. Ring 3 has the shape of a contact surface on the pipe string, while, if necessary, it is possible to replace the ring 3 on a ring with a different shape of the contact surface. From above, an upper adapter 14 is screwed into the body 15, designed to be connected to the drill string, from the bottom, a lower adapter 2 is installed to which either a flushing tool or a plug 1 is attached.

In the housing 15, a mechanism is installed, consisting of a piston of the die 5, which moves with increasing pressure in the radial direction, a die 6 is attached to it with a screw 7, made of a soft material, for example, lead, which is in contact with the surface of the conductor string.

The tool is attached to the drill string and lowered to the level of the casing hangers so that the tool is in contact with the bearing surface of the hanger. After the tool is seated on the casing string hanger, pressurized working fluid is injected into the drill string. In this case, the pin of the shear indicator valve 11 is destroyed and pressure is applied to the piston of the plate 5. The dies 6 are then pressed against the casing head of the conductor string and an imprint of the grooves of the inner profile of the casing head of the conductor string is formed on them, the pressure is maintained for 1 minute. After that, the working fluid is supplied to the drill string shaft under increased pressure, which leads to the destruction of the shear pin of the indicator valve 18 and the fluid from the drill string shaft begins to flow into the cavity of the blowout preventer, while the pressure drops and the fluid flow increases, the fluid supply is stopped.

With a decrease in fluid pressure, the disc springs 9 return the piston of the plate 5 to its original state. Belleville springs 9 are kept from falling out by a sleeve 8. The system of channels 10, 12, 17, 19, 20, 21 serves to supply pressure of the working fluid to the piston of the die 5 and relieve pressure after receiving an impression on the die 6. Some channels are closed with plugs 13 and 22.

After that, the tool is lowered to the surface, the dies 6 are dismantled from the tool and the imprint left on them is studied. The ball valve 16 is removed from the tool body 15 when the tool is used in conjunction with a flushing tool.

Figure 2 shows a tool for measuring the height of casing hangers according to RF patent No. 2701746 (published on 10/01/2019).

The tool has:

23, 24 - contact surfaces;

25 - cone;

26 - guide;

27 - printing;

28 - die;

29 - body;

30 - clamps;

31 - shear screws.

The tool is lowered until the contact surface 23 or 24 is seated on the landing surface of the technical string hanger, the weight of the drill pipes is unloaded onto the controlling tool, the drill string is rotated until the spring-loaded clamps 30 located in the housing 29 fall into the reciprocal grooves on the casing string, due to rotation shear screws 31 are destroyed, the guide 26, loaded with the weight of the drill pipes and rotated by them, descends together with the cone 25, the downward displacement of the cone 25 pushes the dies 28 and the lead seals 27 attached to them in the radial direction, presses the lead seals 27 to the surface of the conductor with grooves, which form impressions on lead seals 27, which makes it possible to measure the height of casing hangers.

In contrast to the technical solution disclosed in the description of the patent of the Russian Federation No. 2701746 (published on 01.10.2019), the proposed technical solution uses a thin-walled spacer sleeve 4, which makes it possible to reduce the metal consumption of the tool design; measurement of the installation height of casing hangers of various diameters, the implementation of removable rings 3 on spacer bushings 4 allows you to adjust the tool for measuring the height of the strings with various forms of the surface in contact with the tool, all this allows you to achieve a technical result, which consists in reducing the metal consumption of the tool, creating the design of a prefabricated tool , suitable for measuring the installation height of casing hanger bodies of various diameters and various designs.

Claims (3)

1. A tool for measuring the height of casing hangers, characterized in that the tool consists of a body located in the upper part of the body of the upper adapter, made with the possibility of attaching to the drill string, a removable spacer sleeve installed in the lower part of the body, at least one piston ram, moving with increasing pressure in the radial direction, with a ram attached to it, made of soft material and in contact with the inner surface of the casing string with the possibility of forming an imprint of the grooves of the inner profile of the casing head on the ram, and valves located inside the body with the possibility of supplying pressure to ram piston and fluid drain from the drill string. 2. The tool according to claim 1, characterized in that the size and shape of the mating surface of the spacer sleeve may vary depending on the design of the casing hangers. 3. The tool according to claim 1, characterized in that a removable ring can be installed on the spacer sleeve, the geometry of which depends on the geometry of the mating surface of the casing hangers.

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