CN114043436A

CN114043436A - Maintenance supporting clamp for submarine pipeline suspended section

Info

Publication number: CN114043436A
Application number: CN202111476749.XA
Authority: CN
Inventors: 孙伟栋; 董绍华; 赵天奉; 高松林; 张延琦; 黄嘉伟
Original assignee: China University of Petroleum Beijing
Current assignee: China University of Petroleum Beijing
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-02-15
Anticipated expiration: 2041-12-06
Also published as: CN114043436B

Abstract

The invention relates to a maintenance support clamp for a submarine pipeline suspended section, which is characterized by comprising the following components: the clamping mechanism is used for clamping the pipeline suspended section; a jacking mechanism configured to be connected to a bottom of the clamping mechanism for supporting and adjusting a height of the clamping mechanism; a locking mechanism for locking the clamping mechanism in a position of a desired height. The maintenance support clamp for the suspended section of the submarine pipeline can be directly installed when a diver touches and confirms the suspended position of the pipeline for the first time, is simple and convenient to install, can realize quick support, and effectively relieves fatigue cycle loss caused by suspension, so that multiple suspended spans can be intensively waited for uniform piling support, and the total suspended treatment cost is saved.

Description

Maintenance supporting clamp for submarine pipeline suspended section

Technical Field

The invention relates to the field of submarine drilling equipment, in particular to a maintenance support clamp for a submarine pipeline suspended section.

Background

The submarine pipeline is a pipeline for continuously conveying a large amount of oil (gas) on the seabed through a closed pipeline, is a main component of an offshore oil (gas) field development and production system, and is also the fastest, safest, most economical and reliable offshore oil and gas transportation mode.

Due to erosion and washing of sea-bottom currents and waves, suspended sections often appear in sea-bottom pipelines buried on the seabed or arranged in pipe ditches. When the suspension distance exceeds the critical length, the static overbending is easy to cause, and the vertical and lateral vibration, even the swinging rope type vibration, is easy to cause the fatigue failure of the pipeline. The existing repair method generally fills a sand bag in a suspended position or adopts an underwater steel pipe pile and a cantilever beam for supporting, and more ship resources need to be mobilized to complete the repair task.

If can when the first diver touches and confirms the unsettled position of pipeline, the fatigue cyclic loss that unsettled bringing just can effectively be alleviated to the one set of simple and easy support anchor clamps of direct mount to can make many places hang and stride the concentrated unified pile driving of waiting and strut, practice thrift total unsettled treatment expense.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a maintenance support clamp for a suspended section of a submarine pipeline, which has the characteristics of simple installation, quick support, and the like, and can adapt to different suspended heights.

In order to achieve the purpose, the invention adopts the following technical scheme:

a maintenance support clamp for a suspended section of subsea conduit, comprising:

the clamping mechanism is used for clamping the pipeline suspended section;

a jacking mechanism configured to be connected to a bottom of the clamping mechanism for supporting and adjusting a height of the clamping mechanism;

a locking mechanism for locking the clamping mechanism in a position of a desired height.

Further, fixture includes last clamping part, lower support portion and card key, go up the one end of clamping part with articulated connection between the lower support portion, go up clamping part and lower support portion cooperation and form a circular, the card key is used for locking or unblock between last clamping part and the lower support portion.

Further, the inner wall of the lower supporting part is provided with a roller.

Further, climbing mechanism include two symmetries set up and respectively with the bracing piece subassembly that the both ends of lower carriage were connected, bracing piece subassembly includes bracing piece and lower bracing piece, go up the bracing piece the top with articulated connection between the lower carriage, the bottom with screwed connection between the lower bracing piece, locking mechanical system is used for the locking bracing piece subassembly for turned angle between the lower carriage.

Further, locking mechanical system includes ratchet, pawl and spring, the ratchet fixed mounting be in on the lower carriage, pawl and spring are all installed go up the bracing piece on, the bottom of pawl with go up rotate between the bracing piece and be connected, the top be used for with the ratchet cooperation, the one end of spring is fixed go up on the bracing piece, the other end is fixed on the pawl, just the spring remains throughout and is tensile state, go up the bracing piece the top with rotate through the pivot between the ratchet and be connected.

Further, the jacking mechanism comprises a base and a jack installed on the base, and the jack is used for supporting and adjusting the height of the clamping mechanism.

Further, locking mechanical system includes the support column, the cover is established sleeve and bolt outside the support column, support column fixed mounting is in on the base, telescopic top is fixed on the lower support portion, and the bottom cover is established outside the support column, be equipped with the first jack of a plurality of along direction of height interval on the support column, set up one on the sleeve with one of them the second jack that first jack aligns, the bolt is inserted and is established the alignment in first jack and the second jack.

Furthermore, the jacking mechanism comprises a base, a middle guide rail arranged on the base, side guide rails positioned on two sides of the middle guide rail, a middle guide sleeve fixed on the lower supporting part, side guide sleeves positioned on two sides of the middle guide sleeve and a gear rack transmission mechanism, wherein the middle guide sleeve is in sliding fit with the middle guide rail, the two side guide sleeves are respectively in sliding fit with the side guide rails on two sides, the gear rack transmission mechanism comprises a pinion and a first straight rack, the pinion is rotatably connected with the middle guide sleeve through a rotating shaft, the first straight rack is fixedly arranged on the middle guide rail, and the gear is meshed with the rack.

Further, the locking mechanism comprises at least one, the locking mechanism comprises a second spur rack fixedly arranged on the side guide sleeve and a locking assembly fixedly arranged on the side guide rail, the locking assembly comprises a mounting plate fixedly mounted on the side guide rail, and a clamping block, a spring and a limiting column which are mounted on the mounting plate, the clamping block is rotationally connected with the mounting plate through a connecting shaft, an inclined plane in sliding fit with the tooth surface of the second straight rack is formed at one end of the clamping block, the bottom of the spring is fixedly arranged on the mounting plate, the top of the spring is connected with the other end of the clamping block, the limiting post is positioned above the other end of the clamping block, when the side guide sleeve moves upwards, the tooth surface is in sliding fit with the inclined surface, the clamping block rotates anticlockwise along the connecting shaft, and the limiting column is used for limiting the clamping block to rotate clockwise.

Further, the first straight rack is a cylindrical rack.

Due to the adoption of the technical scheme, the invention has the following advantages: the maintenance support clamp for the suspended section of the submarine pipeline can be directly installed when a diver confirms the suspended position of the pipeline in a probing mode for the first time, is simple and convenient to install, can realize quick support, and effectively relieves fatigue cycle loss caused by suspension, so that multiple suspended spans can be intensively waited for uniform piling support, and the total suspension treatment cost is saved.

Drawings

FIG. 1 is a schematic structural view of a first embodiment of a repair support clamp for a suspended section of subsea conduit according to the present invention;

FIG. 2 is a schematic structural view of another angle of the first embodiment;

FIG. 3 is a schematic structural view of a second embodiment of a repair support clamp for a suspended section of subsea conduit according to the present invention;

FIG. 4 is a schematic structural view of a third embodiment of a repair support clamp for a suspended section of subsea conduit according to the present invention;

FIG. 5 is a schematic view of another angle structure of the third embodiment;

FIG. 6 is an enlarged partial view of the locking mechanism;

reference numerals:

1,2, 3-maintenance support clamp, 11,21, 31-clamping mechanism, 12,22, 32-jacking mechanism, 13,23, 33-locking mechanism, 111,211, 311-upper clamping part, 112,212, 312-lower supporting part, 113,313-clamping key, 121-upper supporting rod, 122-lower supporting rod, 123-rotating shaft, 131-ratchet wheel, 132-pawl, 133-spring, 14-rod shoe, 213-rubber strip, 214-roller, 221-base, 222-jack, 231-supporting rod, 232 sleeve, 233-jack, 321-base, 322-middle rail, 323-side rail, 324-middle guide sleeve, 325-side guide sleeve, 326-pinion, 327-first straight rack, 331-mounting plate, 332-clamping block, 333-spring sleeve, 321-middle guide rail, 321-base, 322-middle rail, 323-side guide sleeve, 324-side guide sleeve, 326-pinion, 327-first straight rack, 331-mounting plate, 332-clamping block, 332-spring clamping block, 334-a limiting column, 335-a connecting shaft, 336-a bevel and 337-a second spur rack.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the system or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used to define elements only for convenience in distinguishing between the elements, and unless otherwise stated have no special meaning and are not to be construed as indicating or implying any relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The maintenance support clamp for the suspended section of the submarine pipeline can be directly installed when a diver confirms the suspended position of the pipeline in a touching mode for the first time, is simple and convenient to install, can realize quick support, and effectively relieves fatigue cycle loss caused by suspension, so that multiple suspended spans can be intensively waited for uniform piling support, and the total suspension treatment cost is saved.

Example 1

As shown in fig. 1 and 2, a maintenance support clamp for a suspended section of a subsea pipeline according to embodiment 1 of the present invention includes a clamping mechanism 11, a jacking mechanism 12, and a locking mechanism 13. The gripping mechanism 11 is configured for gripping a pipe suspended section. The jacking mechanism 12 is configured to be connected to the bottom of the clamping mechanism 11 for supporting and adjusting the height of the clamping mechanism 11. The locking mechanism 13 is used to lock the gripping mechanism 11 in a position of a desired height.

The clamping mechanism 11 comprises an upper clamping part 111, a lower supporting part 112 and a clamping key 113, wherein one end of the upper clamping part 111 is hinged with the lower supporting part 112, the upper clamping part 111 and the lower supporting part 112 are matched to form a circle, and the clamping key 113 is used for locking or unlocking between the upper clamping part 111 and the lower supporting part 112. When the suspended section of the sea pipeline is clamped and supported, firstly, the clamping key 113 unlocks the upper clamping part 111 and the lower clamping part 112, the upper clamping part 111 is opened, then the pipeline is placed in the lower supporting part 112, and after the pipeline is tightly held by the clamp, the opening can be buckled by the clamping key 113, so that the upper part of the clamp is prevented from being opened.

Preferably, a roller may be further disposed in the lower support portion 112 to facilitate sliding the clamp to the target suspension section position. The lower support part 112 may be covered with a rubber strip for buffering when the pipe is placed, and increasing the contact area between the clamp and the pipe.

The jacking mechanism 12 comprises two symmetrical supporting rod assemblies which are respectively connected with two ends of the lower supporting part 112, each supporting rod assembly comprises an upper supporting rod 121 and a lower supporting rod 122, the top of the upper supporting rod 121 is hinged to the lower supporting part 122, the bottom of the upper supporting rod is in threaded connection with the lower supporting rod 122, and the locking mechanism 13 is used for locking the supporting rod assemblies relative to the rotating angle between the lower supporting parts 112. By adjusting the lower support rod 122, the length of the support rod assembly can be adjusted, and the height of the clamp from the seabed can be adjusted to adapt to the suspended section of the seabed pipeline with different height. In the present invention, the two support rod assemblies are designed to be hinged to the lower support portion 122, and the two support rod assemblies are matched with the locking mechanism 13, so that the included angle between the two support rods can be adjusted, and the two support rod assemblies are fixed on the seabed and support the suspended section of the seabed.

Specifically, the locking mechanism 13 includes a ratchet wheel 131, a pawl 132 and a spring 133, the ratchet wheel 131 is fixedly mounted on the lower support 122, the pawl 132 and the spring 133 are both mounted on the upper support 121, the bottom of the pawl 132 is rotatably connected to the upper support 121, the top of the pawl is used for cooperating with the ratchet wheel 131, one end of the spring 133 is fixed to the upper support 121, the other end of the spring 133 is fixed to the pawl 132, the spring 133 is always kept in a stretched state, and the top of the upper support 121 is rotatably connected to the ratchet wheel 131 through a rotating shaft 123.

The bottom of each of the two support rod assemblies is further provided with a rod shoe 14, and the rod shoe 14 is connected with the bottom end of the lower support rod 122. In order to better secure the support rod assembly within the sub-sea soil, the opposite ends of the two rod shoes 14 are formed as tips. The bottom of the rod shoe 14 is formed into an arc shape, so that the supporting surface between the bottom of the supporting rod and the seabed soil can be increased, the supporting reliability is improved, and the supporting failure caused by the fact that the supporting rod is inserted into the seabed soil in the using process is avoided.

After the jacking mechanism 12 adjusts the clamp to the required height, the support rod assemblies on the two sides are rotated inwards, so that the rod shoes 14 at the bottoms of the two sides are inserted into the seabed soil, and the bottoms of the support rods are fixed.

The working principle of the maintenance support clamp for the suspended section of the submarine pipeline provided by the embodiment 1 is as follows:

s1, after the submarine pipeline clamp is placed on the seabed, the upper part of the clamp can be opened through the clamp key 113, and after the pipeline is tightly held by the clamp, the opening can be buckled through the clamp key 113, so that the upper part of the clamp is prevented from being opened;

s2, the supporting rod is extended or shortened through rotation, and the length of the supporting rod is properly adjusted.

S3, after the jacking mechanism 12 adjusts the clamp to the required height, the supporting rod components on the two sides are rotated inwards to enable the rod shoes 14 at the bottoms of the two sides to be inserted into the seabed soil, so that the bottoms of the supporting rods are fixed, the spring 113 is always in a stretching state, the pawl 132 can be pulled, the supporting rods can be ensured to rotate only in one direction, the rod shoes 14 can ensure that the bottoms of the supporting rods are easier to rotate when contacting with the seabed soil, and a larger supporting surface is provided.

The maintenance support clamp for the suspended section of the submarine pipeline can realize quick support and effectively relieve fatigue cycle loss caused by suspension, so that multiple suspended spans can intensively wait for uniform piling support, and the total suspension treatment cost is saved.

Example 2

As shown in fig. 3, the maintenance support jig for a suspended section of a subsea pipeline according to embodiment 2 of the present invention is different from embodiment 1 in that the jacking mechanism in embodiment 2 includes a base 221 and a jack 222 mounted on the base 221, and the jack 222 is used for supporting and adjusting the height of the clamping mechanism 21.

The locking mechanism 23 comprises a supporting column 231, a sleeve 232 sleeved outside the supporting column 231 and a bolt, the supporting column 231 is fixedly installed on the base 221, the top of the sleeve 232 is fixed on the lower supporting portion 212, the bottom of the sleeve is sleeved outside the supporting column 231, a plurality of first insertion holes 233 are arranged on the supporting column 231 at intervals along the height direction, a second insertion hole aligned with one of the first insertion holes is formed in the sleeve 232, and the bolt is inserted in the first insertion hole 233 and the second insertion hole aligned with each other.

The working principle of the maintenance support clamp for the suspended section of the submarine pipeline provided by the embodiment 2 of the invention is as follows:

s1, after the submarine pipeline clamp is placed on the seabed, the upper part of the clamp can be opened through the clamp key, and after the pipeline is tightly held by the clamp, the clamp is locked through the clamp key to prevent the upper part of the clamp from being opened;

s2, adjusting the clamping mechanism 21 to the required height through the jack 222;

and S3, after the height is controlled by the small jack 222, inserting a bolt into the first insertion hole and the second insertion hole which are aligned with each other so as to fix the supporting column. The small-sized roller 214 on the lower support platform 122 can facilitate the clamp to slide along the submarine pipeline in the radial direction, and the rubber strip 213 can increase the contact area between the pipeline and the clamp and play a role in buffering.

Example 3

As shown in fig. 4 and 5, a maintenance support jig for a suspended section of a submarine pipeline according to embodiment 3 of the present invention differs from

embodiments

1 and 2 in that in embodiment 3, the jacking mechanism includes a base 321, a middle guide rail 322 installed on the base 321, side guide rails 323 located on both sides of the middle guide rail 322, a middle guide sleeve 324 fixed on the lower support 312, side guide sleeves 325 located on both sides of the middle guide sleeve 324, the middle guide sleeve 324 is slidably engaged with the middle guide rail 322, the two side guide sleeves 325 are respectively slidably engaged with the side guide rails 323 on both sides, and a rack and pinion transmission mechanism includes a pinion 326 and a first straight rack 327, the pinion 326 and the middle guide sleeve 324 are rotatably connected through a rotating shaft, the first straight rack 327 is fixedly installed on the middle guide rail 324, the pinion 326 is engaged with a first straight rack 327.

The jacking process of the jacking mechanism 32 is that the rotating shaft drives the pinion 326 to rotate, and the first straight rack 327 is fixed on the base 321, so that the pinion 326 moves upwards along the first straight rack 327 when rotating, the clamping mechanism 31 is driven to move upwards, and then when the clamping mechanism 31 moves to a required height, the clamping mechanism is locked at the required height by the locking mechanism 33.

As shown in fig. 6, the locking mechanism 33 includes at least one set, the locking mechanism 33 includes a second spur rack 337 fixedly installed on the side guide sleeve 325 and a locking component fixedly installed on the side guide rail 323, the locking component includes a mounting plate 331 fixedly installed on the side guide rail 323 and a latch 332, a spring 333 and a limiting post 334 installed on the mounting plate 331, the latch 332 is rotatably connected with the mounting plate 331 through a connecting shaft 335, an inclined plane sliding-fitted with a tooth surface of the second spur rack 337 is formed at one end of the latch 332, the bottom of the spring 333 is fixedly installed on the mounting plate 331, the top is connected with the other end of the latch 332, the limiting post 334 is located above the other end of the latch 332, when the side guide sleeve 325 moves upwards, the tooth surface is sliding-fitted with the inclined plane, the latch 332 rotates counterclockwise along the connecting shaft 335, and the limiting post 334 is used for limiting the latch 332 to rotate clockwise.

The working principle of the maintenance support clamp for the suspended section of the submarine pipeline based on the embodiment 3 is as follows:

s1, after the submarine pipeline clamp is placed on the seabed, the upper part of the clamp can be opened through the clamp key 313, and after the pipeline is tightly held by the clamp, the clamp is locked through the clamp key 313 to prevent the upper part of the clamp from being opened;

s2, the pinion 326 is rotated to drive the middle guide sleeve 324 to move upwards along the middle guide rail 322, and further drive the side guide sleeves 325 on both sides and the supporting clamp to move upwards, the second spur racks 337 on both sides slide on the inclined surfaces of the latch 332 in the moving process, and the latch 332 compresses the spring downwards when sliding over one tooth;

s3, after the clamping mechanism 31 is lifted to the required height, the limiting post 334 limits the clockwise rotation of the latch 332, so as to fix the clamping mechanism 31 at the height position.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A maintenance support clamp for a suspended section of a subsea pipeline, comprising:

the clamping mechanism is used for clamping the pipeline suspended section;

2. The maintenance support clamp for a suspended section of subsea pipeline according to claim 1, characterized in that said clamping mechanism comprises an upper clamping portion, a lower support portion and a key, one end of said upper clamping portion is hinged to said lower support portion, said upper and lower clamping portions are cooperatively formed in a circular shape, and said key is used for locking or unlocking between said upper and lower clamping portions.

3. A service support clamp for a suspended section of subsea pipeline according to claim 2, characterised in that the inner wall of the lower support is provided with rollers.

4. The maintenance support clamp for the suspended section of the submarine pipeline according to claim 1, wherein the jacking mechanism comprises two symmetrically arranged support rod assemblies connected to two ends of the lower support part, the support rod assemblies comprise an upper support rod and a lower support rod, the top of the upper support rod is hinged to the lower support part, the bottom of the upper support rod is screwed to the lower support rod, and the locking mechanism is used for locking the rotation angle of the support rod assemblies relative to the lower support part.

5. The maintenance support clamp for the suspended section of the submarine pipeline according to claim 4, wherein the locking mechanism comprises a ratchet wheel, a pawl and a spring, the ratchet wheel is fixedly installed on the lower support part, the pawl and the spring are both installed on the upper support rod, the bottom of the pawl is rotatably connected with the upper support rod, the top of the pawl is used for being matched with the ratchet wheel, one end of the spring is fixed on the upper support rod, the other end of the spring is fixed on the pawl, the spring is always kept in a stretching state, and the top end of the upper support rod is rotatably connected with the ratchet wheel through a rotating shaft.

6. A service support clamp for a suspended section of subsea conduit according to claim 2, wherein said jacking mechanism comprises a base and a jack mounted on said base for supporting and adjusting the height of said clamping mechanism.

7. The maintenance support jig for the suspended section of the submarine pipeline according to claim 6, wherein the locking mechanism comprises a support column, a sleeve sleeved outside the support column, and a pin, the support column is fixedly mounted on the base, the top of the sleeve is fixed on the lower support portion, the bottom of the sleeve is sleeved outside the support column, a plurality of first insertion holes are formed in the support column at intervals along the height direction, a second insertion hole aligned with one of the first insertion holes is formed in the sleeve, and the pin is inserted into the aligned first insertion hole and the aligned second insertion hole.

8. The maintenance support jig for the suspended section of the submarine pipeline according to claim 2, wherein the jacking mechanism comprises a base, a middle guide rail mounted on the base, side guide rails located at two sides of the middle guide rail, a middle guide sleeve fixed on the lower support part, side guide sleeves located at two sides of the middle guide sleeve, and a rack-and-pinion transmission mechanism, the middle guide sleeve is slidably fitted with the middle guide rail, the two side guide sleeves are slidably fitted with the side guide rails at two sides respectively, the rack-and-pinion transmission mechanism comprises a pinion and a first rack, the pinion and the middle guide sleeve are rotatably connected through a rotating shaft, the first rack is fixedly mounted on the middle guide rail, and the rack is engaged with the rack.

9. The maintenance support jig for the suspended section of the submarine pipeline according to claim 8, wherein the locking mechanism comprises at least one, the locking mechanism comprises a second spur rack fixedly mounted on the side guide sleeve and a locking assembly fixedly mounted on the side guide rail, the locking assembly comprises a mounting plate fixedly mounted on the side guide rail and a clamping block, a spring and a limiting post mounted on the mounting plate, the clamping block is rotatably connected with the mounting plate through a connecting shaft, an inclined plane in sliding fit with the tooth surface of the second spur rack is formed at one end of the clamping block, the bottom of the spring is fixedly mounted on the mounting plate, the top of the spring is connected with the other end of the clamping block, the limiting post is located above the other end of the clamping block, and when the side guide sleeve moves upwards, the tooth surface is in sliding fit with the inclined plane, the clamping block rotates anticlockwise along the connecting shaft, and the limiting column is used for limiting the clamping block to rotate clockwise.

10. A service support clamp for a suspended section of subsea pipeline according to claim 8, characterised in that said first linear rack is a cylindrical rack.