WO2018000538A1

WO2018000538A1 - Unmanned shipborne pipeline maintenance fixture

Info

Publication number: WO2018000538A1
Application number: PCT/CN2016/095104
Authority: WO
Inventors: 杨越
Original assignee: 杨越
Priority date: 2016-06-26
Filing date: 2016-08-14
Publication date: 2018-01-04
Also published as: CN105972375A

Abstract

An unmanned shipborne pipeline maintenance fixture, comprising: two semicircular fixture units (20, 21) located at the opposite locations on flanges (12, 13) and connected together by means of studs (24) and nuts (25), each of the fixture units (20, 21) being provided with a smooth and continuous inner surface (28), and a sealed pipe (29) being attached to each edge; and flanges (22) located at the respective end portions of each of the fixture units (20, 21). A collinear opening (23) is formed in each flange (22), and the studs (24) can penetrate the collinear openings (23).

Description

Unmanned ship pipeline maintenance fixture

Technical field

The invention relates to a maintenance tool, in particular to a pipeline maintenance fixture carried by an unmanned ship in maintenance of a submarine oil and gas pipeline.

Background technique

Fixture repair is to install fasteners-clamps outside the pipeline at the leaking site to achieve the purpose of repairing pipeline leaks. The fixture repair technology is now mature in the maintenance of land and submarine oil and gas pipelines, according to the fixture maintenance technology in the submarine oil and gas pipelines. In application, the most critical component in current maintenance technology is the subsea plumbing fixture. Most of the clamps are made in two halves and are fixed to the pipe by bolting or welding, so they can be divided into welded and bolted. Welded clamps improve repair reliability and bolted connections are more convenient.

For the maintenance of submarine pipelines in China's vast seas, the current method is to install and repair underwater submersibles in Repulse Bay. For deep water areas, the submarine pipelines are referred to the working vessels, and the pipeline damages are pretreated directly on the working vessels. Fix the fixture to the pipe. However, in the case of extremely low visibility of water turbidity, the above two methods have obvious drawbacks. Due to the need to arrange support ships, personnel, maintenance equipment and other auxiliary equipment to the maintenance site, and after the operation is completed, support ships, personnel, maintenance equipment and The recovery of other auxiliary equipment is therefore costly and economical.

The fixtures of domestic manufacturers are mainly used in terrestrial oil and gas pipelines. When used for temporary maintenance, the oil and gas pipelines can be normally sealed for 2-3 months to ensure that oil and gas are not leaked at the seals around the clamps. For permanent maintenance, the fixtures can be used. The pipes are welded together in one piece. Domestic manufacturers have not yet produced equipment for submarine oil and gas pipeline fixtures. The technology of home equipment for foreign submarine oil and gas pipelines is relatively mature. With the rapid development of unmanned ship technology, the development of some special structure fixtures is carried on unmanned ships. In the case of staffing, the repair of the submarine pipeline can be completed by using unmanned ships and maintenance fixtures and appropriate auxiliary equipment, without the need to lift the pipeline to the unmanned ship for pre-treatment, saving time and economic costs.

Summary of the invention

It is therefore an object of the present invention to provide an unmanned ship-line maintenance fixture comprising: a double semi-circular clamp unit, the two clamp units being located at opposite positions on the flange and connected by a double-headed screw and a nut, each The clamp unit has a smooth continuous inner surface with a sealing tube attached to each side; a flange at each end of each clamp unit having a collinear opening in the flange, the double-headed screw passing through the collinear opening.

Preferably, the sealing tube is attached by welding and is constructed of a flexible material, the sealing tube typically having a pleated wall having ridges and grooves.

Preferably, the sealing tube is made of flexible steel.

Preferably, the ridges and grooves are two ridges and three grooves or four ridges and four grooves, or one ridge and two grooves.

Preferably, the sealing tube first molds or stamps the pipe; or obtains a conventional annular pipe or rectangular pipe in a straight line direction and obtains a pressure formed for a desired sectional configuration.

Preferably, the sealing tube is attached to the clamp unit along each side of the inner surface.

Preferably, each side of the opposite side of the pipe of the sealing tube is connected to the clamp unit, the pipe being arranged between two flanges which are far apart.

Preferably, each of the clamp units has a recess in its inner surface, and the duct is placed in the recess.

Preferably, when the clamp is fully connected by the bolt, a tight fit is adopted between the seal pipe and the pipeline flange, and the ridge of the seal pipe is connected to the flange at the periphery and deformed to provide a connection between the clamp and the peripheral flange. Tightly sealed, the clamp portion will be fixed downwardly to provide continuous contact between the ridge 31 and the periphery of the flange.

Preferably, the flange is fabricated to have an outer surface that is approximately circular or circular.

Preferably, the gap around the peripheral region of the flange is eliminated by using a striking device.

Preferably, the striking device is used with a hammer or a hammer and a piercer.

The above as well as other objects, advantages and features of the present invention will become apparent to those skilled in the <

DRAWINGS

Some specific embodiments of the present invention are described in detail below by way of example, and not limitation. The same reference numbers in the drawings identify the same or similar parts. Those skilled in the art should understand that the drawings are not necessarily drawn to scale. The objects and features of the present invention will become more apparent in consideration of the following description in conjunction with the accompanying drawings.

Figure 1 is a perspective view of a clamp positioned at a flange coupling around a pipeline, in conjunction with a prior embodiment of the present invention;

Figure 2 is a side view of a jig unit of the jig of Figure 1;

Figure 3 is a partial bottom end view of the clamp portion of Figure 2;

Figure 4 is an enlarged cross-sectional view of the pipe shown in Figure 3;

Figure 5 is a partial cross-sectional view taken along line 5-5 of Figure 1;

Figures 6 and 7 are views similar to Figure 3, showing an alternate embodiment of the present invention;

Figure 8 shows a view similar to Figure 4 showing an alternative configuration of the conduit.

detailed description

The preferred embodiment of the invention illustrated and described herein is for an apparatus in which the in-line connector has an annular flange. However, the invention is equally applicable to other devices having flanged connections, such as tankers. The hole end cap and the valve cover together have other flange shapes such as rectangular, square, hexagonal and elliptical.

The pipe engaging members between the lengths of the

pipes

10 and 11 are as shown in Figs. Flange 12 is attached to the end of conduit 10, typically by welding, and a similar flange 13 is attached to the end of conduit 11. The spacer 14 is placed in the middle of the abutting faces of the

flanges

12 and 13, and the flanges are joined together by stud bolts 15 which pass through the collimating openings in the

flanges

12 and 13, and each of the two ends of the stud bolt 15 has a Nut. This flanged connection is commonly used in the field of pipelines.

Leakage may occur through the gasket 14 during use of the pipeline. One way to fix the leak is to remove the nut and stud, separate the two flanges, remove the old gasket, insert a new gasket, and reconnect the flanges together. This type of repair requires shutting down the pipeline, so developing a repair fixture can provide temporary and sometimes relatively long-lasting leak repair without affecting pipeline operation. Place the clamp around the location where the leak occurs, forming a seal, usually placed around the flange at the sealing location to define a closed annular area, and then introducing a sealant into the space so that the entire line does not need to be referred to the unmanned ship Maintenance, repair work can be done under the sea

The present invention contemplates a novel clamp structure for this type of sealing operation. The preferred embodiment of the invention utilizes double

semi-circular clamp units

20 and 21, each having a flange 22 at each end and a collinear opening 23 in the flange. The two

clamp units

20 and 21 are located at opposite positions on the

flanges

12 and 13, and are joined together by a stud screw 24 and a nut 25 through which the screw passes.

In the illustrated preferred embodiment, each of the clamp units has a smooth continuous inner surface 28 with a sealing tube 29 attached to each side. Typically the sealed tube is attached by soldering as shown at 30 on Figures 3 and 5.

A preferred form of the sealing tube 29 is shown in cross section in FIG. The sealed tube is typically constructed of a flexible material, typically of flexible steel, although other materials may be used as desired. The sealed tube typically has a pleat wall having a ridge 31 and a groove 32, as shown in Figure 4, two ridges and three grooves are preferred. Alternatively, four ridges and four grooves are also available, one ridge and two grooves as shown in Figure 8. The illustration can also be used. The seal tube material is formed in the desired cross-sectional view. By way of example, the pipe can first be molded or stamped in accordance with the configuration of the desired cross-sectional view. In another embodiment, a conventional annular duct or a rectangular duct in a linear direction can be obtained and the pressure formed for the desired cross-sectional configuration can be obtained.

After obtaining the desired cross-sectional shape, the appropriately lengthed sealing tube is curved into a curve to accommodate the space within the clamp unit and the seal is welded. In a preferred embodiment, the sealing tube is secured to the clamp unit along each side of the inner surface, as shown in FIG. In an alternative arrangement, each side of the opposite side of the pipe is connected to the clamp unit, as shown in Figure 6, the pipe is arranged between two flanges that are far apart. In another alternative arrangement, the inner surface 28 of each clamp unit has a recess 34 therein in which the conduit is placed, as shown in FIG. This arrangement does not require a machining step during the formation of the groove.

During use, the gripper unit is placed around the pipeline and joined together by a stud 24 and a nut 25. The size of the clamp with the sealed tube needs to be marked, so that when the clamp is fully tightened by the bolt, a tight fit is used between the sealed tube and the line flange. Since the clamp portion is secured by a nut on the stud, the ridges of the seal tube 31 are joined to the flange at the

periphery

39, 40 and deformed to provide a tight seal between the clamp and the peripheral flange. The clamp portion will be fixed downwardly to provide continuous contact between the ridge 31 and the periphery of the flange. Typically, flanges such as 12 and 13 are fabricated using approximately circular or circular

outer surfaces

39 and 40. In this case, the inner curved surface 28 of the clamp and its contact sealing tube do not have sufficiently complete intimate contact at all points around the

surfaces

39 and 40. If a gap is visible in the area around the periphery of the flange, the sealing tube should be hammered to close the gap. By using a striking device, such as by a hammer or hammer and a piercer, the ridge is deformed to engage the flange ring adjacent the exposed groove 32 of the ridge 31.

The next step is to introduce the sealant into the clamp unit, the seal tube and the ring formed by the line flange. The injection valve 36 is inserted into the linear opening 37 of the clamp unit, and the sealant is introduced through a suitable valve. After the sealant injection is completed, the injection valve is replaced by a suitable closure device, such as a tube plug or a vulcanized sealant, which uses an integral piston 38.

The seal between the seal tube and the line flange is desirably achieved by the sealant during the sealant injection process. When the sealant overflows at the intersection between the clamp seal tube ridge 31 and the line flange, the small opening can be closed by hammering the seal tube groove to provide a better sealing engagement of the seal tube ridge with the line flange.

The present invention has been described with reference to the specific illustrative embodiments, and is not limited by the scope of the appended claims. It will be appreciated by those skilled in the art that the embodiments of the invention can be modified and modified without departing from the scope and spirit of the invention.

Claims

An unmanned ship-loaded pipeline maintenance fixture characterized by comprising:

Double semi-circular clamp unit (20, 21), two clamp units (20, 21) are located at opposite positions on the flanges (12, 13), and are connected by a double-headed screw (24) and a nut (25), Each clamp unit (20, 21) has a smooth continuous inner surface (28) with a sealing tube (29) attached to each side;

a flange (22) at each end of each clamp unit (20, 21) having a collinear opening (23) in the flange (22), the double-headed screw (24) passing through the collinear opening ( twenty three).
An unmanned ship-line maintenance jig according to claim 1, wherein said sealing tube (29) is attached by welding and is composed of a flexible material, and said sealing tube (29) usually has a A pleat wall having a ridge (31) and a groove (32).
An unmanned ship-line maintenance jig according to claim 2, wherein said sealing tube (29) is made of flexible steel.
An unmanned ship-line maintenance jig according to claim 2, wherein said ridge (31) and groove (32) are two ridges and three or four ridges and Four grooves, or one ridge and two grooves.
The unmanned ship-line maintenance kit according to claim 2, wherein the sealing tube (29) first molds or punches the pipe; or obtains a conventional annular pipe or a rectangular pipe in a straight line direction and obtains The pressure formed by the desired cross-sectional configuration.
An unmanned ship-borne pipeline repair jig according to claim 2, wherein said sealing tube (29) is fixed to the gripper unit along each side of the inner surface.
An unmanned ship-line maintenance jig according to claim 2, wherein each side of the opposite side of the pipe of the sealing pipe (29) is connected to the clamp unit, and the pipe is arranged at two distances. Very far between the flanges.
An unmanned ship pipeline maintenance jig according to claim 1, wherein: A groove (34) is formed in the inner surface (28) of each of the clamp units, and the pipe is placed in the groove (34).
The unmanned ship-mounted pipeline maintenance jig according to claim 1, wherein when the clamp is completely connected by the bolt, a tight fit is adopted between the seal pipe and the pipeline flange, and the seal pipe (31) The ridges are joined to the flange at the periphery (39, 40) and deformed to provide a tight seal between the clamp and the peripheral flange, the clamp portion will be fixed downwardly to provide the ridge (31) and the flange ( 22, 23) Continuous contact between the periphery.
An unmanned ship-line service repair jig according to claim 1, wherein said flange (12, 13) is formed as an outer surface (39, 40) having an approximately circular or circular shape.