CN105065777B - Anchoring plate type naked pipeline lateral displacement control device - Google Patents

Abstract

The invention relates to an anchoring plate type naked pipeline lateral displacement control device. The anchoring plate type naked pipeline lateral displacement control device comprises an anchoring plate (1) used for a pressure bearing pipeline (5), a sliding bearing (2), a mooring rope (3) and self-unlocking hooks (4), wherein the anchoring plate (1) comprises a disc (6), connection rings (7) and multiple cylinders (8) with openings in the bottom; the cylinders (8) are evenly distributed; one middle connection ring (7) used for being connected with the mooring rope (3) is fixedly arranged in the center of the disc (6); the other two hook connection rings (7) used for being connected with the self-unlocking hooks (4) are fixedly arranged on the two sides of the disc (6); the sliding bearing (2) comprises an inner bearing ring (9), an outer bearing ring (11) with a groove (10) and a protection layer structure (12); the outer surface of the outer bearing ring (11) is provided with the groove (10); the protection layer structure (12) is fixed to the inner bearing ring (9). According to the anchoring plate type naked pipeline lateral displacement control device, the problem that lateral displacement is large in the whole bending process of a deep sea naked pipeline can be solved effectively.

Description

The naked laid pipes lateral displacement control device of one kind anchoring disc type

Art

The invention belongs to naked laid pipes complete buckling control field, when there is complete buckling for pipeline lateral displacement is carried out Control.

Background technology

Development and the exploitation of Marine oil and gas resource, particularly deepwater and marginal oil field with ocean engineering technology Exploitation, the operating pressure of submarine pipeline is improved constantly, and its design temperature generally reaches more than 100 DEG C, or even 150 DEG C, occurs in that More and more submarine pipelines worked under high temperature, environment under high pressure.Under the synergy of hot load and compressive load, pipeline will Generation axial deformation, around under the restriction of the soil body, pipeline will bear larger axial stress.When axial stress reaches certain value When, pipeline will occur complete buckling, including axially move integrally, vertical flexing and lateral buckling.In general, buried pipeline is received Surrounding soil is limited can occur vertical flexing, swell upwards；And for the naked pipeline being layered on sea bed, what lateral buckling occurred can Energy property is larger.Investigation to existing submarine pipeline shows that the harm of pipeline bending deformation can not be ignored.Submarine pipeline is high in high temperature Complete buckling deformation controlling problem under pressure effect becomes the critical problem of pipe design.

For generally there are two kinds of design objects in the design of high temperature, high pressure submarine pipeline complete buckling：The first is complete There is complete buckling in restriction conduit；For second to allow pipeline that complete buckling occurs, but pipeline occur flexing position and The moment of flexure and Stress Control of post-buckling in allowed limits, i.e. pipeline flexing under control.For the first design object, lead to Frequently with ditching, the method for embedded or enrockment carrys out restriction conduit generation complete buckling, but for buried pipeline, the buried depth of pipeline It is the governing factor of design, ability restriction conduit occurs protuberance flexing only in the case where the depth of burying meets requirement, and The axial stress of pipeline cannot effectively discharge.Buried by ditching or enrockment exists in the method that restriction conduit occurs complete buckling Shallow sea construction in frequently with.In deep-sea, ditching is embedded and enrockment operation difficulty is big, high cost.Therefore, for the naked pipe laying in deep-sea For road, it is allowed to which it is that control pipeline complete buckling is designed only in deepwater exploitation that pipeline occurs the method for designing of complete buckling One feasible method.

For the design object for allowing pipeline that complete buckling occurs under control, can pipeline occur overall in predeterminated position Flexing is extremely important.The method for generally adopting at present has：Snakelike laying-out tube process, sleeper method of perturbation and distribution buoyancy method.Existing swashs Send out the method for submarine pipeline generation complete buckling all can only excite Submarine Pipeline by increasing initial imperfection or reduction lateral resistance There is complete buckling in road, complete buckling is converted into into the little flexing of multistage so as to protective conduit is not destroyed.But, when pipeline occur it is whole After body flexing, the amplitude of submarine pipeline complete buckling can not be controlled.If there is serious lateral buckling in submarine pipeline, even if Lateral displacement is still excessive after above-mentioned three kinds of methods are employed.Stress in pipeline will be caused excessive, so as to cause Submarine Pipeline There is local buckling or the problems such as pipeline breaking in road, this will cause pipe leakage or make the pipeline cannot normal work.Additionally, Above-mentioned three kinds of methods are only applicable to long-distance sand transport pipeline, but for infield gathering line, because it is apart from relatively Short, above-mentioned three kinds of methods will no longer be suitable for.

The content of the invention

In order to overcome the shortcomings of in prior art, the present invention provides one kind and enters when the naked laid pipes in deep-sea occur complete buckling The device of row lateral displacement control., when pipeline occurs complete buckling, the shifted laterally distance of pipeline is in the peace for designing for the device When in full distance, lateral soil drag is not provided；When the shifted laterally distance of pipeline reach the limiting safe of design apart from when, can To increase the lateral soil drag that pipeline is subject to, so as to the lateral displacement of control pipeline further increases, effectively solving deep-sea is naked The excessive problem of lateral displacement during laid pipes complete buckling.Technical scheme is as follows：

One kind anchoring naked laid pipes lateral displacement control device of disc type, including the anchor disc (1) for bearing pipe (5), Sliding bearing (2), mooring line (3) and the several parts of locking and hanging hook (4) are self solved, wherein,

Anchor disc (1) includes the cylinder (8) for opening up pertusate disk (6), connection ring (7) and several bottom openings, often Individual cylinder (8) is fixedly connected on the lower section at certain hole, and each cylinder (8) is uniformly arranged, and be centrosymmetric design；In disk (6) center is fixed with the intermediate connector (7) for connecting mooring line (3), is further fixed on being self solved for connection in its both sides Two other clevis coupler (7) of locking and hanging hook (4)；

Sliding bearing (2) includes bearing inner race (9), the bearing outer ring (11) with fluted (10) and protective layer structure (12), the internal diameter of bearing inner race (9) is engaged with the external diameter of pipeline (5), and bearing inner race (9) is simultaneously fixed on pipeline (5)；Bearing Outer ring (11) can rotate around bearing inner race (9), the outer surface belt fluted (10) of bearing outer ring (11), for winding mooring Cable (3)；Protective layer structure (12) is fixed on bearing outer ring (9), whole sliding bearing (2) is surrounded, in protective layer structure (12) bottom is provided with the aperture passed through for mooring line (3)；Two hook holes (13) are carried on protective layer structure (12)；

Locking and hanging hook (4) is self solved including two hooks, one end of hook is provided with pin shaft hole, and other end is hook-shaped, using pin Axle will be provided with one end of pin shaft hole and couple together with the clevis coupler (7) in anchor disc (1)；Its hook-shaped one end is hooked on guarantor On the hook hole (13) of shielding layer structure (12).

The device that the present invention is provided can be used alone in naked laid pipes complete buckling is controlled, it is also possible to swash with existing The method for sending out submarine pipeline generation complete buckling is used in combination, so as to better control over the deformation of submarine pipeline complete buckling, it is to avoid Submarine pipeline integrity is caused to be destroyed because pipeline lateral displacement is excessive.Specifically, with following beneficial effect：

1. sliding bearing rather than rolling bearing are adopted, strengthens corrosion resistance and wearability.Avoid the rolling of rolling bearing The perishable and not wear-resisting shortcoming of kinetoplast.

2. discharged using bearing and mooring line rather than be directly wound in pipeline outer wall so that mooring line during release with There is no directly contact in pipeline outer wall, it is to avoid frictionally damage of the mooring line to pipeline outer wall, it is to avoid mooring line applies to pipeline Additional torque.

3. bearing outer wall is provided with protective layer, protects sliding bearing normal work, prevents seabed silt and halobiontic attached .

4. fix by anchor disc, by the maximum lateral displacement of mooring line length control pipeline, it is ensured that pipeline is in safety In the range of free movement, eliminate axial stress accumulation.

5. control device is simple and convenient, is hardly damaged.

Description of the drawings

Fig. 1 is the overall structure diagram of apparatus of the present invention

Fig. 2 is the structural representation of anchor disc

Fig. 3 is the schematic cross section of sliding bearing

Fig. 4 be pipe-laying process in and laying after the completion of Self-unlocking hook status schematic diagram

Fig. 5 is the working state schematic representation that pipeline occurs this device during shifted laterally

In figure：1st, anchor disc, 2, sliding bearing, 3, mooring line, 4, self solve locking and hanging hook, 5, pipeline, 6, circular steel plate (circle Disk), 7, connection ring, 8, columnar structured, 9, bearing inner race, 10, groove, 11, bearing outer ring, 12, protective layer structure, 13, hang Dog hole

Specific embodiment

With reference to the accompanying drawings and examples the invention will be further described.

1st, lateral displacement control device of the invention, mainly includes anchor disc 1, sliding bearing 2, mooring line 3 and Self-unlocking Link up with 4 several parts (referring to Fig. 1).

2nd, anchor disc 1 includes columnar structured 8 (ginsengs of 6, three connection rings 7 of a circular steel plate and several bottom openings See Fig. 2).The lower section of circular steel plate 6 is welded with columnar structured the 8 of several bottom openings, and columnar structured 8 are evenly distributed in The lower section of circular steel plate 6.One of connection ring 7 is located at the middle of the top of circular steel plate 6, for connecting mooring line 3；Separately Outer two connection rings 7 are located at the both sides of intermediate connecting ring 7, and for connection locking and hanging hook 4 is self solved.During working condition, in anchor disc 1 Columnar structured 8 insertion sea bed, increases the lateral movement soil drag of pipeline 5, the lateral displacement of restriction conduit 5.It is of the invention used The structure of anchor disc 1 using centrosymmetry design, the power from different directions can be born, when pipeline 5 it is past in the both sides of anchor disc 1 When moving again, this device has identical effect.

3rd, sliding bearing 2 is including bearing inner race 9, with fluted 10 the bearing outer ring 11, (the present embodiment of protective layer structure 12 Protective layer structure be the steel drum bigger than the bearing outer ring 11 of sliding bearing, referring to Fig. 3).The internal diameter of bearing inner race 9 and pipeline 5 External diameter match, bearing inner race 9 is fixed by welding on pipeline 5, it is ensured that do not produce relative slip to each other.Bearing outer ring 11 internal diameter is equal or slightly larger than the external diameter of bearing inner race 9, and bearing outer ring 11 can be rotated around bearing inner race 9, bearing outer ring 11 outer surface belt fluted 10, for winding mooring line 3.Protective layer structure 12 is welded in bearing outer ring 9, by whole sliding axle Hold 2 to be surrounded, make sliding bearing 2 avoid mechanical damage, aperture is provided with protective layer structure 12, aperture is tied positioned at protective layer The bottom of structure 12, the mooring line 3 for being wrapped in sliding bearing 2 is stretched out by this aperture, and mooring is in anchor disc 1.In addition, protection Two hook holes 13 are carried on Rotating fields 12, the hook for self solving locking and hanging hook 4 is hung on this hook hole 13.

4th, mooring line 3 can adopt steel cables, and the cable of other materials may also be employed.One end of mooring line 3 is fixed on cunning On the bearing outer ring 11 of dynamic bearing 2, other end is fixed on the connecting hole of anchor disc 1.Mooring line 3 is determined according to design requirement Length, it would be desirable to the length of mooring line 3 be wrapped on the groove 10 on bearing outer ring 11.

5th, self solve locking and hanging hook 4 to be made up of two hooks.One end of hook is provided with pin shaft hole, and other end is hook formation. One end of pin shaft hole will be provided with using bearing pin to couple together with the connecting hole in anchor disc 1.It is hook-shaped in the process of deployment of pipeline 5 Structure is hung on the hook hole 13 on protective layer structure 12, it is to avoid anchor disc 1 departs from (referring to Fig. 4-1) with pipeline 5.Pipeline 5 spreads If after the completion of, the hook self solved in locking and hanging hook 4 departs from (referring to Fig. 4-2) with the hook hole 13 on protective layer structure 12 automatically.From The effect of solution locking and hanging hook 4 is to ensure that the anchor disc 1 in process of deployment of pipeline 5 does not depart from pipeline 5；After the completion of pipeline 5 is laid, This self-locking structure does not affect the normal work of apparatus of the present invention.

6th, after the completion of pipeline 5 is laid, the insertion sea bed of anchor disc 1, pipeline 5 is pressed in the top of anchor disc 1 (referring to Fig. 4-2).Anchor Gu disk 1 plays a part of to increase the lateral movement soil drag of pipeline 5 by self gravitation and the embedded sea bed of the gravity of pipeline 5.Work as pipe When road 5 occurs complete buckling, the shifted laterally of pipeline 5, anchor disc 1 is remained stationary as, the mooring line 3 being wrapped on bearing outer ring 11 Divide and unclamp, anchor disc 1 does not provide lateral soil drag.When the lateral movement of pipeline 5 is to certain distance, bearing outer ring 11 is wrapped in On mooring line 3 be totally released, anchor disc 1 starts to provide lateral soil drag, so as to the shifted laterally of restriction conduit 5 is (referring to figure 5)。

Claims (1)

1. a kind of naked laid pipes lateral displacement control device of anchoring disc type, including the anchor disc (1) for bearing pipe (5), slides Dynamic bearing (2), mooring line (3) and (4) four parts of locking and hanging hook are self solved, wherein,

Anchor disc (1) includes the cylinder (8) for opening up pertusate disk (6), connection ring (7) and several bottom openings, each circle Cylinder (8) is fixedly connected on the lower section at certain hole, and each cylinder (8) is uniformly arranged, and be centrosymmetric design；In disk (6) Center be fixed with intermediate connecting ring (7) for connecting mooring line (3), intermediate connecting ring (7) both sides be further fixed on for Connection self solves two other hook connection ring (7) of locking and hanging hook (4)；

Sliding bearing (2) includes bearing inner race (9), the bearing outer ring (11) with fluted (10) and protective layer structure (12), axle The internal diameter for holding inner ring (9) is engaged with the external diameter of pipeline (5), and bearing inner race (9) is simultaneously fixed on pipeline (5)；Bearing outer ring (11) can rotate around bearing inner race (9), the outer surface belt fluted (10) of bearing outer ring (11), for winding mooring line (3)；Protective layer structure (12) is fixed on bearing outer ring (9), whole sliding bearing (2) is surrounded, in protective layer structure (12) bottom is provided with the aperture passed through for mooring line (3)；Two hook holes (13) are carried on protective layer structure (12)；

Locking and hanging hook (4) is self solved including two hooks, one end of hook is provided with pin shaft hole, and other end is hook-shaped, is incited somebody to action using bearing pin It is provided with one end of pin shaft hole to couple together with the hook connection ring (7) in anchor disc (1)；Its hook-shaped one end is hooked on protective layer On the hook hole (13) of structure (12).