CN204984397U - Testing arrangement under water with preventer transition structure - Google Patents

Abstract

The utility model discloses an underwater test device with a transitional structure of a blowout preventer, which comprises a protective sleeve sleeved on the outer circle of the upper part of the main body, and the outer circumferential surface of the protective sleeve is sleeved with the inner circumferential surface of the blowout preventer gate. The outer peripheral surface of the blowout preventer ram is socketed with the inner cavity wall of the blowout preventer; the upper port of the protective sleeve is installed with a support plate, and the upper port of the main body is coaxially socketed with the lower end of the connecting pup joint, and the upper end of the connecting pup joint passes through The shaft center hole of the support plate is socketed with the working pipe string; the step hole at the lower part of the main body is set on the central cylinder of the installation tool, and the lower end surface of the main body sits on the step surface of the installation tool; the outer circumference of the lower part of the main body is provided with a transition sleeve The connecting sleeve, the inner bottom surface of the upper end of the connecting sleeve rests on the upper end surface of the transition sleeve, and the lower end of the connecting sleeve is socketed with the outer circumference of the step surface of the installation tool; a control hole is opened in the main body parallel to the axis. The device of the utility model improves work efficiency and reduces manufacturing and use costs.

Description

A kind of underwater test device with transitional structure of blowout preventer

technical field

The utility model belongs to the technical field of offshore oil drilling equipment and relates to an underwater testing device with a blowout preventer transition structure.

Background technique

The subsea tree and its supporting equipment are the key equipment of the underwater production system, and it is also the bottleneck restricting the exploitation of deep water oil and gas in my country. With the continuous development and improvement of the subsea tree and its supporting equipment, the matching There are special tools for equipment hoisting, transportation, installation/recycling, testing and other operations. The performance of these special tools directly affects the cost, safety and environmental protection of subsea tree installation operations.

On deep-water work platforms, it is necessary to connect complex control pipelines for installation tools to realize remote operations such as installation, locking, and testing of underwater equipment such as tubing hangers, hole protectors, and underwater safety valves. At the same time, after the underwater equipment is installed at the target location, it is necessary to carry out the sealing test of the main channel, control pipeline and external annulus to confirm the correct, safe and effective installation of the equipment. On the one hand, the existing installation tools have single functions and are not equipped with testing devices. After the installation of underwater equipment is completed, the installation tools need to be recovered and put into special testing tools for testing. This method increases the installation time and work of underwater equipment. risk and reduce work efficiency. On the other hand, limited by the size of the main diameter of the Christmas tree, the installation tool must have a compact structure and a reasonable length-to-diameter ratio while satisfying basic functions such as installation and locking. In this way, it is not feasible to expand the function and provide a sealing mating surface by increasing the length of the installation tool. Due to the high investment and high risk of installation and recovery of Christmas trees and their equipment, there is an urgent need to improve operating tools to improve operating efficiency, shorten operating time, and reduce operating risks.

Utility model content

The purpose of this utility model is to provide an underwater testing device with a BOP transition structure, which solves the problem that the prior art cannot simultaneously complete the installation of underwater equipment and the sealing test of the annular space in the same operation process.

The technical solution adopted by the utility model is, an underwater testing device with a transitional structure of a blowout preventer, including a main body,

The outer circumference of the upper part of the main body is socketed with a protective sleeve, the outer peripheral surface of the protective sleeve is socketed with the inner peripheral surface of the BOP ram, and the outer peripheral surface of the BOP ram is socketed with the inner cavity wall of the BOP; A support plate is installed on the upper port of the sleeve, and the support plate has an axis hole;

The upper port of the main body is coaxially socketed upwards with the lower end of the connecting pup, and the upper end of the connecting pup passes through the axial hole of the support plate and is socketed with the working pipe string;

The step hole at the lower part of the main body is set on the central cylinder of the installation tool, and the lower end surface of the main body sits on the step surface of the installation tool; a positioning pin is arranged between the lower end surface of the main body and the step surface of the installation tool;

The outer circumference of the lower part of the main body is sleeved with a transition sleeve, and the outer circumference of the transition sleeve is provided with a connecting sleeve, and a fastener II is radially arranged in the connecting sleeve, and the fastener II is inwardly connected to the main body; the connecting sleeve The inner bottom surface of the upper end rests on the upper end surface of the transition sleeve, and the lower end of the connecting sleeve is socketed with the outer circumference of the step surface of the installation tool;

A control hole is opened in the circular wall of the main body parallel to the axis line, and the control hole protrudes upwards out of the support plate through the connecting pipe; the control hole is downwardly connected with the control oil circuit on the step surface of the installation tool in a sealed manner.

The underwater testing device with the transitional structure of the blowout preventer of the present utility model is also characterized in that:

A seal is arranged between the inner wall of the stepped hole at the lower part of the main body and the outer wall of the center cylinder of the installation tool.

The installation tool, the main body, the connection nipple and the working pipe string are provided with through inner holes.

The supporting plate is connected with the protective sleeve through the fastener I.

The beneficial effect of the utility model is that this kind of underwater testing device with a BOP transition structure is hereinafter referred to as the testing device, which effectively protects the control pipeline of the installation tool, and solves the problem that the underwater equipment cannot be completed simultaneously in the same operation process. For the problems of installation work and annular space sealing inspection, the installation and testing of underwater equipment can be completed with only one release, which greatly shortens the underwater operation time and improves the safety and work efficiency of underwater equipment installation operations; By replacing conversion joints such as connecting sleeves, the connection of installation tools for underwater equipment with different specifications and interface sizes is realized, the versatility of the test device is improved, and the manufacturing and use costs are reduced.

Description of drawings

Fig. 1 is the structural representation of the utility model device.

In the figure, 1. Connecting nipple, 2. Fastener I, 3. Support plate, 4. Connecting pipe, 5. Protective sleeve, 6. Fastener II, 7. Connecting sleeve, 8. Transition sleeve , 9. Main body, 10. Seals, 11. Locating pins, 12. Operation string, 13. BOP ram, 14. Installation tools.

detailed description

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

With reference to Fig. 1, the structure of the present utility model is, comprises hollow main body 9,

The outer circular thread of the upper part of the main body 9 is socketed with a protective sleeve 5, the outer peripheral surface c of the protective sleeve 5 is socketed with the inner peripheral surface d of the BOP ram 13, and the outer peripheral surface of the BOP ram 13 is in contact with the blowout preventer The inner cavity wall of the device is socketed; the upper port of the protective sleeve 5 is installed with a support plate 3 through a fastener I2, and the support plate 3 has an axis hole;

The upper port of the main body 9 is coaxially socketed upwards with the lower end of the connecting nipple 1, and the upper end of the connecting nipple 1 passes through the axial hole of the support plate 3 and is socketed with the working pipe string 12 through a self-sealing thread;

The stepped hole at the lower part of the main body 9 is set on the central cylinder of the installation tool 14, and the lower end surface of the main body 9 sits on the stepped surface h of the installation tool 14; between the inner wall f of the stepped hole at the lower part of the main body 9 and the outer wall e of the central cylinder of the installation tool 14 A seal 10 is provided, and a positioning pin 11 is provided between the lower end surface of the main body 9 and the stepped surface h of the installation tool 14;

The outer circumference of the lower part of the main body 9 is threadedly connected with a transition sleeve 8, the outer circumference of the transition sleeve 8 is provided with a connecting sleeve 7, and the connecting sleeve 7 is radially provided with a fastener II6, which is inwardly connected with the main body. 9 top connection; the inner bottom surface of the upper end of the connecting sleeve 7 rides on the upper end surface of the transition sleeve 8, and the lower end of the connecting sleeve 7 is threadedly socketed with the outer circumference of the step surface h of the installation tool 14;

There is a control hole g parallel to the axis line in the round wall of the main body 9, and the control hole g extends upwards through the connecting pipe 4 to the outside of the support plate 3; the control hole g downwards and the control oil circuit of the step surface h of the installation tool 14 passes through the hydraulic joint sealed connection;

The installation tool 14 , the main body 9 , the connection nipple 1 and the working string 12 are provided with through inner holes.

By replacing the connection sleeve 7 and the transition sleeve 8, the connection of installation tools 14 with different interface sizes can be realized.

The connecting pipe 4 and the control hole g communicate with the corresponding control channel on the installation tool 14, and a single or multiple pipelines can be provided according to the actual situation.

The connection puppet 1 is connected with the main body 9 and the working pipe string 12 through self-sealing threads, or other matching dimensions plus sealing rings and other connection forms.

The transition sleeve 8 and the main body 9 are threaded and detachable. If the installation tool 14 has only one screw thread specification, the transition sleeve 8 and the main body 9 can also be designed as an integrated structure.

The seals 10 can be single or multiple seals, and can also be respectively or all metal seals, non-metal seals or combined seals.

The seal 10 is located in the ring groove of the inner hole of the main body 9, and can also be designed on the outer cylindrical surface of the installation tool 14 for sealing fit.

The positioning pin 11 is connected to the lower end surface of the main body 9 by threads, and can also be connected to the installation tool 14; the positioning pin 11 can also be other guiding and positioning structures such as positioning blocks and guide keys.

The support plate 3 and the protective sleeve 5 are fixedly connected by the fastener I2, and can also be connected by threaded connection, riveting, welding or clamps.

The fastener II6 is located in the threaded hole perpendicular to the axis at the upper end of the connecting sleeve 7, and can be composed of single or multiple fasteners. By tightening or loosening the fastener II6, the locking or floating of the connecting sleeve 7 relative to the main body 9 is realized.

The working principle of the present utility model is,

The protective sleeve 5 is located on the outside of the connecting pipe 4. When the BOP ram 13 is closed, it protects the connecting pipe 4 on the one hand; The sealing components in the circular surface d cooperate to form a sealing contact and separate the upstream and downstream annular spaces of the BOP ram 13 .

The lower end of the connecting pipe 4 is connected to the control hole g on the main body 9, and the upper end of the connecting pipe 4 is connected to the pipeline of the control system of the water operation platform; the control oil circuit of the control hole g and the step surface h of the installation tool 14 is sealed and connected through a hydraulic joint to form a passage; , the control oil circuit in the installation tool 14 can be pressed through the control system of the water operation platform to complete operations such as locking, unlocking and testing of the underwater equipment.

Before installing the protective sleeve 5, first connect the large hole end of the connecting sleeve 7 downward, and the small hole end upward, pass through the main body 9, and the bottom surface of the inner hole of the connecting sleeve 7 contacts the upper end surface of the transition sleeve 8; the transition sleeve 8 It is connected to the lower part of the main body 9 through threads; the fastener II6 is located in the threaded hole at the upper end of the connecting sleeve 7 perpendicular to the axis, when the test device is not connected with the installation tool 14 and the fastener II6 is not tightened, the connecting sleeve 7 can be along The main body 9 is free to rotate and move in the axial direction; the lower part of the connecting sleeve 7 is firmly connected to the outer circle of the installation tool 14 through threads, and then the fastener II6 is tightened to lock the connecting sleeve 7 and the main body 9.

The seal 10 is located in the ring groove of the cylindrical surface f of the inner hole of the main body 9, and cooperates with the upper outer cylindrical surface e of the installation tool 14 to form a seal; , the positioning pin 11 is inserted into the guide hole at the upper end of the installation tool 14 to ensure the correct centering position of the test device and the installation tool 14.

When using the test device for installation of underwater equipment, the lower end of the test device is connected to the underwater equipment and its installation tool 14, and is lowered into the water through the operation string 12. After being lowered to the target position, the installation tool 14 is controlled by the control system of the water operation platform. Pressurize the control oil circuit of the underwater equipment installed above, install the underwater equipment and lock it. At this time, the BOP ram 13 is closed, and the outer cylindrical surface c of the protective sleeve 5 is sealed with the BOP ram 13d to separate the upstream and downstream annular spaces of the BOP ram 13; at this time, the connection short The inner hole of section 1, the inner hole of the main body 9, the inner hole of the installation tool 14 and the main channel of the underwater equipment together form the sealed channel A chamber; the downstream of the BOP ram 13, the inner wall of the BOP and the test device, the installation tool 14 and the water The peripheral seal of the lower equipment forms a closed annular space B cavity.

The working process of the present utility model is,

1) Preparation of the test device before the installation tool 14 is connected

Thread the working pipe string 12 to the upper end of the connecting pup joint 1, and connect the control pipelines on the upper end surface of the support plate 3; tighten the transition sleeve 8 to the upper limit position; loosen the fastener II 6, so that the connecting sleeve 7 can move up and down and Rotate freely; slowly move the connecting sleeve 7 upwards until the upper end surface contacts the lower end surface of the protective sleeve 5; tighten the fastener II6 to make the connecting sleeve 7 in a high position.

2) Connect the test device with the installation tool 14

Lift the test device so that the positioning pin 11 is aligned with the positioning hole on the step surface of the installation tool 14, and at the same time the hydraulic joint is in the same position as the control hole g, and slowly lower the working string 12 until the step surface h of the installation tool 14 and the lower end surface of the main body 9 contact, the connecting pipe 4 is connected to the installation tool 14 to control the flow channel, and the connection sleeve 7 is not connected to the installation tool 14 at this time;

Loosen the fastener II6 so that the connecting sleeve 7 can move up and down and rotate freely; by rotating the connecting sleeve 7 to the lower limit position, the connection between the installation tool 14 and the test device is realized; then, tighten the fastener II6 to connect the sleeve 7 fully locked;

Test the control passage formed by the connecting pipe 4 and the installation tool 14 to control the flow channel to ensure effective sealing; so far, the test device is reliably connected to the lowering operation string 12 and the underwater installation tool 14 .

3) Lowering and installing underwater equipment

Assume that the blowout preventer group and the manifold have been connected to the wellhead device from the operation platform; Squeeze, the high-pressure liquid drives the installation tool 14 to lock the driving device, so as to realize the installation and locking of the underwater equipment.

4) Installation and testing of underwater equipment

On the water operation platform, pressurize the connecting pipe 4, and measure the pressure loss and leakage in the connecting pipe 4 within a specified time to check the sealing effectiveness and locking of the connection between the control pipeline of the installation tool 14 and the control channel of the underwater equipment validity;

Pressurize the main channel of the working pipe string 12, and measure the pressure loss and leakage of chamber A within the specified time to check the connection function and sealing effectiveness of the main channel of the underwater equipment; The pressure in the annular cavity B formed with the underwater equipment can be tested by measuring the pressure loss and leakage of the B cavity within a specified period of time to test the sealing effectiveness of the outer seal of the underwater equipment and the annular channel.

For different underwater equipment and installation tools 14, if the connection thread specifications of the installation tool 14 change, replace the matching connecting sleeve 7 and transition sleeve 8, and the rest of the test device structure remains unchanged, so that installation tools with different connection sizes can be realized 14 connections.

Claims (4)

1. a kind of underwater testing device with blowout preventer transition structure, it is characterized in that: comprise main body (9), The outer circumference of the upper part of the main body (9) is socketed with a protective sleeve (5), the outer peripheral surface of the protective sleeve (5) is socketed with the inner peripheral surface of the BOP ram (13), and the BOP ram (13) The outer peripheral surface of the BOP is socketed with the inner cavity wall of the blowout preventer; a support plate (3) is installed on the upper port of the protective sleeve (5), and the support plate (3) has an axis hole; The upper port of the main body (9) is coaxially socketed upwards with the lower end of the connecting nipple (1), and the upper end of the connecting nipple (1) passes through the axial hole of the support plate (3) and socketed with the working pipe string (12); The step hole at the bottom of the main body (9) is set on the central cylinder of the installation tool (14), and the lower end surface of the main body (9) is seated on the step surface of the installation tool (14); the lower end surface of the main body (9) and the installation tool ( 14) positioning pins (11) are arranged between the step surfaces; The outer circumference of the lower part of the main body (9) is sleeved with a transition sleeve (8), the outer circumference of the transition sleeve (8) is provided with a connecting sleeve (7), and the connecting sleeve (7) is radially provided with a fastener II ( 6), the fastener II (6) is inwardly connected to the main body (9); the inner bottom surface of the upper end of the connecting sleeve (7) rests on the upper end surface of the transition sleeve (8), and the lower end of the connecting sleeve (7) and the The outer circumference of the step surface of the installation tool (14) is socketed; There is a control hole in the round wall of the main body (9) parallel to the axis line, and the control hole extends upward through the connecting pipe (4) outside the support plate (3); road seal connection. 2. The underwater testing device with a BOP transition structure according to claim 1, characterized in that: the inner wall of the step hole at the bottom of the main body (9) and the outer wall of the center cylinder of the installation tool (14) are provided with Seal (10). 3. The underwater testing device with BOP transition structure according to claim 1, characterized in that: the installation tool (14), the main body (9), the connecting nipple (1) and the working string ( 12) A through inner hole is provided. 4. The underwater testing device with a BOP transition structure according to claim 1, characterized in that: the support plate (3) is connected to the protective sleeve (5) through a fastener I (2).