CN109577901A - A kind of subsea wellhead connector and its pilot system and test method - Google Patents
A kind of subsea wellhead connector and its pilot system and test method Download PDFInfo
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- CN109577901A CN109577901A CN201811410231.4A CN201811410231A CN109577901A CN 109577901 A CN109577901 A CN 109577901A CN 201811410231 A CN201811410231 A CN 201811410231A CN 109577901 A CN109577901 A CN 109577901A
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- 238000010998 test method Methods 0.000 title claims abstract description 12
- 238000012360 testing method Methods 0.000 claims abstract description 143
- 210000000078 claw Anatomy 0.000 claims abstract description 40
- 238000009434 installation Methods 0.000 claims abstract description 13
- 238000006073 displacement reaction Methods 0.000 claims description 33
- 230000003068 static effect Effects 0.000 claims description 25
- 238000010276 construction Methods 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000013480 data collection Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000011888 foil Substances 0.000 claims description 3
- 230000037237 body shape Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000004088 simulation Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 43
- 230000002706 hydrostatic effect Effects 0.000 description 14
- 238000005259 measurement Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 9
- 230000008901 benefit Effects 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 238000012790 confirmation Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000005526 G1 to G0 transition Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/035—Well heads; Setting-up thereof specially adapted for underwater installations
- E21B33/038—Connectors used on well heads, e.g. for connecting blow-out preventer and riser
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Physics & Mathematics (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of subsea wellhead connectors, including connector body, drive ring and locking claw；It is characterized by: generally vertical columnar structured of connection ontology, the medium position in connection body height direction is equipped with claw mounting hole, and sliding plug has locking claw in claw mounting hole；Drive ring is slidably socketed outside connector body, and the lateral surface of drive ring is equipped with a circle driving bulge loop of radially evagination；It further include support ring, support ring is generally coaxially fixedly mounted on the cirque structure of connector body lower end surface, support ring is faced with above-mentioned driving with bulge loop, and support ring and the driving hydraulic cylinder installation position being provided between bulge loop for driving hydraulic cylinder fixed installation.The invention also discloses a kind of subsea wellhead connector pilot system and test methods.Technical solution of the present invention can real simulation test subsea wellhead connector, help the higher subsea wellhead connector of manufacturing quality better reliability.
Description
Technical field
The invention belongs to subsea wellhead connector fields, and in particular to a kind of subsea wellhead connector and its pilot system and
Test method.
Background technique
Subsea wellhead connector is the important equipment of gas and oil in sea exploitation, and lower connection wellhead assembly connects thereon
Subsea blowout preventer (being drilled well and well workover operating condition) or production tree (production status).Compared with other underwater connectors, underwater well head
Connector is even more important and the operating condition faced is more complicated, after such as installing, produce, be drilled the processes such as well and well workover, while also face
Face rugged environment operating condition, such as the drift of wave, ocean current, drill ship, the tension and moment of flexure that recycle internal pressure, marine riser, these
Factor directly affects the working performance of subsea wellhead connector, or even can cause disabler and structural damage.
Only be disclosed in the prior art be related to subsea wellhead connector construction technical solution (such as: notification number is
The patent document of CN102003157A and CN107013176A), but the presence of existing subsea wellhead connector is difficult to simulate
Test, it is difficult to be detected the shortcoming of the performance indicators such as loaded situation and manufacturing quality.
Based on this, applicant considers to design a kind of underwater well head connection for being easy to be tested and tested quality and reliability
Device.
Summary of the invention
In view of the above shortcomings of the prior art, the technical problems to be solved by the present invention are: how to provide one kind be easy to by
Test and test the subsea wellhead connector of quality and reliability.And further provide for a kind of subsea wellhead connector pilot system
And test method.
In order to solve the above-mentioned technical problem, present invention employs the following technical solutions:
A kind of subsea wellhead connector, including connector body, drive ring and locking claw, the drive ring are generally round
Tubular construction, and the medial surface of the drive ring is the cone barrel face that diameter becomes larger from top to bottom；The locking claw is whole
Body is bulk, and the medial surface for locking claw is with the arc that locking teeth, lateral surface are that overall diameter becomes larger from top to bottom
It face and can be slidably connected with the medial surface of the drive ring；It is characterized by:
The medium position of generally vertical columnar structured of the connection ontology, the connection body height direction is equipped with
The claw mounting hole extended radially through, sliding plug has the locking clamp pawl in the claw mounting hole, and in connection ontology
At least two claw mounting holes are arranged at intervals on circumferencial direction；The drive ring is slidably socketed in the connector body
Outside, and the lateral surface of the drive ring is equipped with a circle driving bulge loop of radially evagination；
It further include support ring, the support ring is generally coaxially fixedly mounted on the annulus of the connector body lower end surface
Shape structure, and the interior diameter of the support ring be more than or equal to the connector body lower end interior diameter, the support ring with it is upper
It states driving to be faced with bulge loop, and the support ring and the driving are fixedly mounted with being provided between bulge loop for driving hydraulic cylinder
Hydraulic cylinder installation position.
A kind of subsea wellhead connector pilot system, it is characterised in that: the subsea wellhead connector is above-mentioned underwater well
Mouth connector, which includes testing stand, test pile, closure connector, driving hydraulic cylinder and test hydraulic system；
The test pile is cylindric and constitutes test water well head in sea, and the upper section lateral surface of the test pile, which has, to be supplied
The annular slot that the locking teeth of locking claw is caught in；The test pile lower end is fixed on the upper surface of the testing stand；
The closure is generally cylindric with connector, and the upper end blocked with connector and the connector body
Sealing is fixedly linked；And the outer surface of cupular part of closure connector is additionally provided with static pressure test interface, the static pressure examination
Testing can be connected to hydraulic interface with the static pressure test hydraulic interface with the connector body inside；
The driving hydraulic cylinder is fixedly mounted on the hydraulic cylinder installation position；
The test hydraulic system includes hydraulic control valve, the hydraulic control valve have in the driving hydraulic cylinder
Interface and the hydraulic interface that is respectively communicated with interface of the static pressure test.
A kind of subsea wellhead connector test method, which is characterized in that use above-mentioned subsea wellhead connector pilot system.
Subsea wellhead connector of the present invention and its pilot system and test method have the advantage, that
1, compared with subsea wellhead connector compare, subsea wellhead connector of the present invention has the advantage, that
Can the hydraulic cylinder installation position installation small-scale liquid cylinder pressure directly between drive ring and support ring drive drive ring
Movement, to realize the operation of the locking and unlock between subsea wellhead connector and well head rapidly, and convenient for it is intuitive rapidly
The action situation of subsea wellhead connector is observed, the reliability for examining subsea wellhead connector persistently to act.
2, subsea wellhead connector pilot system of the present invention can really simulate underwater well head with test method and connect
The working environment of device and loaded situation, and then can be wanted according to the working environment of subsea wellhead connector, design feature and function
It asks, simulates its loaded situation, carry out the research of subsea wellhead connector mechanical property test, the designed reliability and system of checking construction
Quality is made, actual measurement strain measurement is provided as a result, obtaining its mechanical behavior rule, is the application of subsea wellhead connector product engineering
Test data reference is provided.Help produces performance and the more structurally sound subsea wellhead connector product of quality.
Detailed description of the invention
Fig. 1 is the structural schematic diagram (being equipped with closure connector at the top of connector) of subsea wellhead connector of the present invention.
Fig. 2 is the top view (being equipped with closure connector at the top of connector) of subsea wellhead connector of the present invention.
Fig. 3 is A-A cross-sectional view in Fig. 2 (being fitted without closure connector at the top of connector).
Fig. 4 acquires schematic diagram (wherein " S " expression of sensor to be equipped on subsea wellhead connector of the present invention in Fig. 1
" resistance strain gage ", " W " expression " displacement sensor ").
Fig. 5 is the structural schematic diagram (can be used for axis pulling experiment) of subsea wellhead connector pilot system of the present invention.
Fig. 6 is the structural schematic diagram (can be used for axis drawing and moment test) of subsea wellhead connector pilot system of the present invention.
Fig. 1 is marked into Fig. 6
Subsea wellhead connector:
100 connector bodies；
101 drive rings: 102 driving bulge loops, 103 limit baffle rings；
104 locking claws；
105 support rings；
106 guide grooves；
107 guide runners；
108 guide cylinders；
109 locking levels；
110 sandwich block；
111 connection bolts；
112 mounting seats；
113 guide and limit pins；
114 plugs.
Subsea wellhead connector pilot system:
200 driving hydraulic cylinders；
201 testing stands；
202 test piles；
Connector is used in 203 closure；
204 axis pulling blocks；
Hydraulic cylinder is used in the drawing of 205 axis；
206 curved pressure arms；
207 hydraulic jacks.
Fig. 7 is test loading procedure displacement measuring points (W1~W4) load displacement curve (Hydrostatic Pressure).
Fig. 8 is test loading procedure measuring point (S1~S4) load-strain curve (Hydrostatic Pressure).
Fig. 9 is test loading procedure measuring point (S5~S8) load-strain curve (Hydrostatic Pressure).
Figure 10 is test loading procedure measuring point (S24~S31) load-strain curve (Hydrostatic Pressure).
Figure 11 is test loading procedure displacement measuring points (W1~W4) load displacement curve (operating condition one).
Figure 12 is test loading procedure measuring point (S1~S4) load-strain curve (operating condition one).
Figure 13 is test loading procedure measuring point (S5~S8) load-strain curve (operating condition one).
Figure 14 is test loading procedure measuring point (S24~S31) load-strain curve (operating condition one).
Figure 15 is test loading procedure displacement measuring points (W1~W4) load displacement curve (operating condition two).
Figure 16 is test loading procedure measuring point (S1~S4) load-strain curve (operating condition two).
Figure 17 is test loading procedure measuring point (S5~S8) load-strain curve (operating condition two).
Figure 18 is test loading procedure measuring point (S24~S31) load-strain curve (operating condition two).
Figure 19 is test loading procedure displacement measuring points (W1~W4) load displacement curve (operating condition three).
Figure 20 is test loading procedure measuring point (S1~S4) load-strain curve (operating condition three).
Figure 21 is test loading procedure measuring point (S5~S8) load-strain curve (operating condition three).
Figure 22 is test loading procedure measuring point (S24~S31) load-strain curve (operating condition three).
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing.
One, when being embodied: as shown in Figure 1 to Figure 3, subsea wellhead connector
A kind of subsea wellhead connector, including connector body, drive ring and locking claw, the drive ring are generally round
Tubular construction, and the medial surface of the drive ring is the cone barrel face that diameter becomes larger from top to bottom；The locking claw is whole
Body is bulk, and the medial surface for locking claw is with the arc that locking teeth, lateral surface are that overall diameter becomes larger from top to bottom
It face and can be slidably connected with the medial surface of the drive ring；
The medium position of generally vertical columnar structured of the connection ontology, the connection body height direction is equipped with
The claw mounting hole extended radially through, sliding plug has the locking clamp pawl in the claw mounting hole, and in connection ontology
At least two claw mounting holes are arranged at intervals on circumferencial direction；The drive ring is slidably socketed in the connector body
Outside, and the lateral surface of the drive ring is equipped with a circle driving bulge loop of radially evagination；
It further include support ring, the support ring is generally coaxially fixedly mounted on the annulus of the connector body lower end surface
Shape structure, and the interior diameter of the support ring be more than or equal to the connector body lower end interior diameter, the support ring with it is upper
It states driving to be faced with bulge loop, and the support ring and the driving are fixedly mounted with being provided between bulge loop for driving hydraulic cylinder
Hydraulic cylinder installation position.
When implementation, vertical perforation is preferably provided in support ring, the lower end surface of connector body is equipped with vertically wears with described
The threaded hole of hole face connects between support ring and connector body by the way that the screw being plugged in vertical perforation and threaded hole is fixed
It is connected together.So, between support ring and connector body be split type structure, be not only easy to it is separately fabricated, and assemble
It is also more convenient to get up.
When implementation, preferably it is arranged along the circumferencial direction uniform intervals of connector body there are four the hydraulic cylinder installation position,
The push rod of each driving hydraulic cylinder is upward and upper end runs through driving bulge loop and is fixedly connected with one piece admittedly in end position
Determine block, the surrounding of the fixed block is fixed together by the upper surface of screw and driving bulge loop；Each driving is hydraulic
The cylinder body lower end of cylinder is fixed together by flange and screw with support ring.So, the drive at hydraulic cylinder installation position
It is very convenient that the dismounting of hydrodynamic cylinder pressure is got up, and will not impact to the normal use of subsea wellhead connector.
Wherein, subsea wellhead connector further includes driving guide frame, and the driving guide frame includes guide groove and leads
To sliding block；The guide groove is located at the lateral surface being located at below locking clamp pawl in the short transverse of the connector body, and institute
Stating guide groove is the axially extending straight bathtub construction along the connector body；The lower end of the drive ring is fixed with described lead
To sliding block, and on the guide runner in drive ring inner end sliding plug radially in the guide groove.
After above-mentioned driving guide frame, that is, it can avoid drive ring mobile along connector body axial (short transverse)
Rotation in the process (rotation can cause the relative movement between drive ring and impeller), it is ensured that the movement of drive ring more precisely may be used
It leans on.Therefore drive ring is set in the structure on the outside of connector body by the present invention, is not only easy to testing inspection, is also easy to
Setting driving guide frame, substantially ensures the accuracy and reliability of drive ring movement.
When implementation, the medial surface lower end of the preferably described drive ring has convexed to form a limit baffle ring radially inward；Institute
The c-type block (as shown in Figure 3) that guide runner is generally connected on limit baffle ring is stated, and the lower end of the c-type block is by vertically passing through
The screw worn and the screw hole of the limit baffle ring lower end surface are fixed together.So, guide runner may make to drive
Fixed more simple, the structure that above-mentioned guide runner is matched with limit baffle ring of assembly on rotating ring, can also optimize guiding and slide
Stress of the block in drive ring axial direction is (so that the stress of guide runner up and down direction is all transferred to limit baffle ring and passes through limiting block
Ring is born) so that guide runner is not easy to deform due to mutually touching with other hard objects fallen into guide groove under water, has and hold
Fixed and guiding effect reliable long.
Wherein, subsea wellhead connector further includes well head connection guide frame, and the well head connection guide frame includes leading
To cylinder；The upper section of the guide cylinder is homoaxial columnar structured with the connector body, and is fixed on the support ring
Lower surface；The interior diameter of the upper section of the guide cylinder is more than or equal to the interior diameter of the connector body lower end；The guiding
The lower section of cylinder is the taper barrel structure that interior diameter becomes larger from top to bottom.
Using above-mentioned well head connect guide frame after, i.e., can using the infundibulate of guide cylinder lower section come in decentralization process into
Row guiding, thus the landing for helping subsea wellhead connector faster more quasi-.
When implementation, the upper end for being preferably directed cylinder has flanged joint side, and flanged joint connection side passes through screw and support
It is fixed together between ring.It may make in this way and be easier to individually produce between guide cylinder and support ring and quick assembling.
Wherein, subsea wellhead connector further includes drive ring retaining mechanism, and the drive ring retaining mechanism includes a lock
Fixed pole, two pieces of double team blocks and connection bolt；
The lower end of the locking level is fixed on the upper surface of the support ring, and the upper section of the locking level runs through and is higher than drive
It employs bulge loop and lateral surface is with locking double wedge；
Two pieces of double teams block transverse direction face, and the medium position of right opposite is the outside face contact with the upper section of locking level
Connected circular groove, two pieces sandwich blocks between by be located at circular groove both sides connection bolt be fixedly linked；It is described
The lower end surface of two pieces of double team blocks is the abutting face for pushing against driving bulge loop upper surface.
After above-mentioned drive ring retaining mechanism, drive ring can reliably be locked, effectively really after locking claw locking
Protect the reliability connected between wellhead connector and well head.
When implementation, the preferably described drive ring retaining mechanism further includes a mounting seat；The mounting seat is integrally in flat
Bulk, and middle part is to vertical through there is the perforative perforation of a upper section for locking level；The mounting seat, which passes through to be located at, wears
Multiple countersunk head connecting holes and screw around hole are fixed on the upper surface of driving bulge loop；And the mounting seat pad is pressed in two pieces
It sandwiches between block and the upper surface of driving bulge loop；The upper surface of two pieces of double team blocks is additionally provided with vertical perforation, the mounting seat
Upper surface has the threaded hole with the vertical perforation face, passes through attachment screw stationary phase in the vertical perforation and threaded hole
Even.So, the locking that can further improve two pieces of double team blocks consolidates effect.
When implementation, preferably along the circumferencial direction uniform intervals of connector body be provided with two groups described in drive ring locking machine
Structure.Stress difference is more uniform when may make the locking of driving bulge loop in this way, promotes the reliability of locking.
Wherein, subsea wellhead connector further includes locking claw position limiting structure, and the locking claw position limiting structure includes leading
To spacer pin, plug and pressure spring；
The upper surface of the locking claw is equipped with the groove radially extended along connector body, and the groove is in radial direction
Inner end is open end, and outboard end is closed end；The upper surface of the connector body is provided through to be connected to the groove
Through-hole, the bottom of the through-hole is inserted with the guide and limit pin, and the lower end of the guide and limit pin is plugged on the groove
It is interior, it is fixed with the plug at the top of the through-hole, is abutted before the upper surface of the plug and the guide and limit pin
State pressure spring.
The setting of above-mentioned locking claw position limiting structure can be avoided locking claw and deviate from out of claw mounting hole.
Furthermore it is preferred that position when locking claw retracts completely, the slot bottom of groove and the lower end contact position of guide and limit pin
It is recessed to be formed with a pit, and be the inclined-plane that smoothly transits between the pit and surrounding slot bottom.So, can pass through
The limit that pit is matched with guide and limit pin to ensure to lock claw in complete retract, avoid locking claw transport or under
Offset during putting；And can be when locking process is driven ring and pushes, guide and limit pin lower end can be suitable out of pit
Benefit removes.
Two, as shown in Figure 5 and Figure 6 it is subsea wellhead connector pilot system:
A kind of subsea wellhead connector pilot system, the subsea wellhead connector are above-mentioned subsea wellhead connector, should
Pilot system includes testing stand, test pile, closure connector, driving hydraulic cylinder and test hydraulic system；
The test pile is cylindric and constitutes test water well head in sea, and the upper section lateral surface of the test pile, which has, to be supplied
The annular slot that the locking teeth of locking claw is caught in；The test pile lower end is fixed on the upper surface of the testing stand；
The closure is generally cylindric with connector, and the upper end blocked with connector and the connector body
Sealing is fixedly linked；And the outer surface of cupular part of closure connector is additionally provided with static pressure test interface, the static pressure examination
Testing can be connected to hydraulic interface with the static pressure test hydraulic interface with the connector body inside；
The driving hydraulic cylinder is fixedly mounted on the hydraulic cylinder installation position；
The test hydraulic system includes hydraulic control valve, the hydraulic control valve have in the driving hydraulic cylinder
Interface and the hydraulic interface that is respectively communicated with interface of the static pressure test.
The test pile of the above pilot system can simulate underwater wellhead, and for subsea wellhead connector real simulation water
Lower locking process.When implementation, the interior lower end of test pile is closed end to complete static pressure test.
The closure connector of the above pilot system, for blocking inside connector body and test pile and forming sealing
Chamber, consequently facilitating by block connector on static pressure test with interface come into seal chamber water-filling pressurize, with observation lock it is close
Feng Xing.
When implementation, it is connected preferably between closure connector and the upper end of connector body to be threadably secured.
When implementation, test hydraulic system is existing hydraulic system (including fuel tank, oil pump (high-pressure pump), hydraulic control
Valve and pressure gauge), this will not be repeated here.
Wherein, subsea wellhead connector pilot system further includes axis pulling block, axis drawing hydraulic cylinder and resistance strain gage；
It is fixedly linked between the lower end surface of the axis pulling block and the upper surface of closure connector, and the axis pulling block is along certainly
The lateral surface evagination of body circumferencial direction is formed with the axis drawing bulge loop of a circle Yu driving bulge loop face；
Driving bulge loop and axis drawing are drawn with the axis drawing hydraulic cylinder, the axis is fixedly installed between bulge loop and are used liquid
Interface on cylinder pressure is connected by pipeline with corresponding control interface on the hydraulic control valve；
The lateral surface of closure connector and the lateral surface of test pile are respectively along the circumferential direction fixedly installed with multiple
Resistance strain gage, multiple resistance strain gages pass through cable respectively and are connected with interface corresponding in data collection system.
After adding the above axis pulling block, axis drawing hydraulic cylinder and resistance strain gage, that is, it may make up axis pulling experiment structure, which draws
Test structure has the advantages that simple and ingenious structure, cost are lower.Underwater well head connection is detected by multiple electronics foil gauges
The deformation situation of device key position, so that the result of detection more refers to and use value.
When implementation, preferably circumferentially method is arranged at intervals with multiple threaded connection holes, institute for the upper surface of closure connector
The upper surface for stating axis pulling block is equipped with counter sink corresponding with each threaded connection hole, grafting in each threaded connection hole and counter sink
There is screw so that closure is fastened together with connector and axis pulling block.
Wherein, subsea wellhead connector pilot system further includes displacement sensor, curved pressure arm and hydraulic jack；
Circumferencial direction between the drive ring and support ring along connector body is arranged at intervals with multiple displacement sensors,
Multiple displacement sensors pass through cable respectively and are connected with interface corresponding in data collection system；
One end of the curved pressure arm is fixedly linked with the axis pulling block, and the curved pressure arm horizontal extension extends to underwater well head company
It connects the outside of device vertical projection and forms top splenium；
The outer end of the piston rod of the hydraulic jack is vertically upward and for top splenium described in ejection.
The subsea wellhead connector pilot system including " displacement sensor, curved pressure arm and hydraulic jack " i.e. can also above
For completing moment test.Axis pulling experiment structure is taken full advantage of, so that pilot system has clever structure, cost is lower, examination
Test feature-rich advantage；Improve the synthesis use value of subsea wellhead connector pilot system.
When implementation, the lower surface of the top splenium of curved pressure arm is spaced along its length at 2-3 press of setting, is not only filled in this way
Divide the structure using curved pressure arm；The torque of a variety of availability tests can also be generated using the arm of force of different length, to help
It helps and obtains more abundant testing inspection result.
When implementation, the upper end on the curved pressure arm far from axis pulling block is equipped with hanging ring.It is arranged after above-mentioned hanging ring to can be used and hangs
Shipping unit lifts curved pressure arm, to eliminate influence of the weight to test load of pilot system.
When implementation, the preferably described curved pressure arm includes vertically going up face and the consistent two pieces of stressed plates of shapes and sizes, and two pieces
Vertical welding is fixed with 2-3 block reinforcing rib block before stressed plate, so that the curved pressure arm constitutes bending resistance girder construction, avoids curved pressure arm
Stress deformation, so that test process can be more reliable.
Wherein, axis pulling block upper end is fixedly linked by flange and bolt with the curved pressure arm.
It may make in this way easy to assembly between axis pulling block and curved pressure arm, connection is reliable, uniform force.
Three, the following are a kind of preferred subsea wellhead connector test methods:
The test method includes four operating conditions, is Hydrostatic Pressure test and three internal pressures, axis drawing, moment of flexure combined load respectively
Static test, specific test procedure are as follows:
Operating condition one (Hydrostatic Pressure test):
(1) it is tested in the locked condition；It is preloaded, testing system and test model, is measured before test
Connector strain and deformation understand test model stress distribution situation, and confirmation is without can carry out formal test after security risk.
(2) Hydrostatic Pressure is tested, and applies 69MPa internal pressure, and pressure maintaining 15min is strained, displacement measurement.
Operating condition two (combined load static test):
(1) keep subsea wellhead connector locking state constant, release；
(2) it is preloaded before testing, testing system, loading device and test model, measurement underwater well head connection
Device strain and deformation, understand model stress distribution situation, adjust the relative position of connector and loading device, confirm hidden without safety
Formal test can be carried out after trouble.
(3) apply internal pressure to connector to 69MPa, in this case, apply respectively 1335kN axial tension and
The moment of flexure of 2712kNm；After the completion of axle power and moment of flexure apply, protects and carry 15min, strained, displacement measurement.
Operating condition three (combined load static test):
(1) it keeps subsea wellhead connector locking state constant, unloads release；
(2) position for adjusting load cylinder, is preloaded before test, testing system, loading device and test mould
Type, the strain of measurement subsea wellhead connector and deformation, understand model stress distribution situation, adjust the phase of connector and loading device
To position, confirmation is without can carry out formal test after security risk.
(3) it applies internal pressure to subsea wellhead connector to 69MPa and applies 1335kN axial tension respectively in this case
With the moment of flexure of 4067kNm；After the completion of axle power and moment of flexure apply, protects and carry 15min, strained, displacement measurement.
Operating condition four (combined load static test):
(1) it keeps subsea wellhead connector locking state constant, unloads release；
(2) position for adjusting load cylinder, is preloaded before test, testing system, loading device and test mould
Type, the strain of measurement connector and deformation, understand model stress distribution situation, adjust the phase of subsea wellhead connector and loading device
To position, confirmation is without can carry out formal test after security risk.
(3) it applies internal pressure to subsea wellhead connector to 69MPa and applies 1335kN axial tension respectively in this case
With the moment of flexure of 5423kNm；After the completion of axle power and moment of flexure apply, protects and carry 15min, strained, displacement measurement.
Locking unlock repetitive operation is carried out to subsea wellhead connector after completing above-mentioned test, then dismantles and is examined
It looks into, the inspection including visual examination, dimensional gaughing and screw thread.
1.1 Hydrostatic Pressure testing experiments
The load strain of each load phase is recorded during Hydrostatic Pressure testing experiment, obtains test process
Each phase data, as shown in table to table, corresponding load-strain curve is as shown in figure to figure.
Table 1 tests loading procedure displacement measuring points (W1~W4) load displacement value (Hydrostatic Pressure)
| P(psi) | W1(mm) | W2(mm) | W3(mm) | W4(mm) |
| 0 | 0 | 0 | 0 | 0 |
| 5000 | 0.01 | 0.02 | 0.01 | 0.01 |
| 10000 | 0.03 | 0.04 | 0.03 | 0.02 |
Table 2 tests loading procedure measuring point (S1~S4) load strain value (Hydrostatic Pressure)
| P(psi) | S1(με) | S2(με) | S3(με) | S4(με) |
| 0 | 0 | -1 | -1 | 0 |
| 5000 | -10 | -8 | -7 | -7 |
| 10000 | -22 | -19 | -17 | -22 |
Table 3 tests loading procedure measuring point (S5~S8) load strain value (Hydrostatic Pressure)
Table 4 tests loading procedure measuring point (S24~S31) load strain value (Hydrostatic Pressure)
1.2 combined load static tests (operating condition one)
During the operating condition one of combined load static test is tested, the load strain of each load phase is remembered
Record obtains test various stages data, and if table 5 is to shown in table, corresponding load-strain curve is as shown in Figure 11 to figure.
Table 5 tests loading procedure displacement measuring points (W1~W4) load displacement value (operating condition one)
| F(kN) | W1(mm) | W2(mm) | W3(mm) | W4(mm) |
| 0 | 0.03 | 0.04 | 0.03 | 0.02 |
| 250 | -0.22 | -0.08 | -0.16 | 0.03 |
| 500 | -0.24 | -0.09 | -0.16 | 0.04 |
| 750 | -0.27 | -0.10 | -0.16 | 0.04 |
| 1000 | -0.27 | -0.10 | -0.16 | 0.04 |
| 1100 | -0.27 | -0.10 | -0.16 | 0.04 |
| 1200 | -0.26 | -0.10 | -0.16 | 0.04 |
| 1300 | -0.26 | -0.10 | -0.16 | 0.03 |
| 1335 | -0.26 | -0.10 | -0.16 | 0.03 |
Table 6 tests loading procedure measuring point (S1~S4) load strain value (operating condition one)
Table 7 tests loading procedure measuring point (S5~S8) load strain value (operating condition one)
Table 8 tests loading procedure measuring point (S24~S31) load strain value (operating condition one)
1.3 combined load static tests (operating condition two)
During the operating condition two of combined load static test is tested, the load strain of each load phase is remembered
Record obtains test various stages data, and if table 9 is to shown in table, corresponding load-strain curve is as shown in Figure 15 to figure.
Table 9 tests loading procedure displacement measuring points (W1~W4) load displacement value (operating condition two)
| F(kN) | W1(mm) | W2(mm) | W3(mm) | W4(mm) |
| 0 | 0.03 | 0.04 | 0.03 | 0.02 |
| 250 | -0.01 | 0.01 | 0.01 | 0.03 |
| 500 | -0.04 | 0.01 | 0.01 | 0.04 |
| 750 | -0.04 | -0.01 | 0.01 | 0.03 |
| 1000 | -0.05 | -0.01 | 0.01 | 0.03 |
| 1100 | -0.05 | -0.02 | 0.04 | 0.02 |
| 1200 | -0.03 | -0.03 | 0.10 | 0.02 |
| 1300 | -0.02 | -0.03 | 0.17 | 0.01 |
| 1335 | -0.02 | -0.04 | 0.18 | 0.01 |
Table 10 tests loading procedure measuring point (S1~S4) load strain value (operating condition two)
| F(kN) | S1(με) | S2(με) | S3(με) | S4(με) |
| 0 | -28 | -23 | -23 | -39 |
| 250 | -35 | -23 | -23 | -37 |
| 500 | -40 | -23 | -23 | -35 |
| 750 | -50 | -26 | -26 | -35 |
| 1000 | -58 | -27 | -27 | -35 |
| 1100 | -62 | -27 | -26 | -36 |
| 1200 | -65 | -28 | -27 | -36 |
| 1300 | -69 | -29 | -26 | -35 |
| 1335 | -70 | -29 | -26 | -35 |
Table 11 tests loading procedure measuring point (S5~S8) load strain value (operating condition two)
Table 12 tests loading procedure measuring point (S24~S31) load strain value (operating condition two)
1.4 combined load static tests (operating condition three)
During the operating condition three of combined load static test is tested, the load strain of each load phase is remembered
Record obtains test various stages data, and if table 13 is to shown in table, corresponding load-strain curve is as shown in Figure 16 to Fig. 3.
Table 13 tests loading procedure displacement measuring points (W1~W4) load displacement value (operating condition three)
| F(kN) | W1(mm) | W2(mm) | W3(mm) | W4(mm) |
| 0 | 0.03 | 0.04 | 0.03 | 0.02 |
| 250 | -0.02 | 0.01 | 0.01 | 0.03 |
| 500 | -0.06 | -0.01 | 0.01 | 0.04 |
| 750 | -0.06 | -0.02 | 0.02 | 0.02 |
| 1000 | -0.02 | -0.03 | 0.20 | -0.01 |
| 1100 | -0.02 | -0.04 | 0.23 | -0.02 |
| 1200 | -0.01 | -0.05 | 0.26 | -0.02 |
| 1300 | -0.01 | -0.07 | 0.28 | -0.03 |
| 1335 | -0.02 | -0.08 | 0.28 | -0.02 |
Table 14 tests loading procedure measuring point (S1~S4) load strain value (operating condition three)
Table 15 tests loading procedure measuring point (S5~S8) load strain value (operating condition three)
Table 16 tests loading procedure measuring point (S24~S31) load strain value (operating condition three)
Conclusion
By can be with to subsea wellhead connector Mechanics Performance Testing test strain, displacement, the analysis of load measuring results
It is concluded that
(1) the strain measurement piece of subsea wellhead connector Mechanics Performance Testing test arrangement is converted into one-way piece totally 20, and 4
A displacement measuring points, through analyzing measurement data, each foil gauge and displacement sensor are in Hydrostatic Pressure testing experiment and internal pressure, axis
Measurement result during drawing, moment of flexure combined load static test is effective, and data are accurate and reliable, is the knot of subsea wellhead connector
Structure design provides reliable test data support.
(2) during entire test, surveyed internal pressure-displacement curve, internal pressure-strain curve, load-displacement curves and load
Linear trend is presented in lotus-strain curve, shows that during the whole test process, subsea wellhead connector is in elastic shape on the whole
State.
(3) during the whole test process, subsea wellhead connector internal pressure is protected to carry and be stablized, visual No leakage during test.
It follows that the leakproofness of the subsea wellhead connector is reliable.
The above is only the preferred embodiment of the present invention, it is noted that not departing from this for those skilled in the art
Under the premise of technical solution, the technical solution for the several modifications and improvements made should equally be contemplated as falling within the claims requirement
The range of protection.
Claims (10)
1. a kind of subsea wellhead connector, including connector body, drive ring and locking claw, the drive ring generally cylinder
Shape structure, and the medial surface of the drive ring is the cone barrel face that diameter becomes larger from top to bottom；The locking claw is whole
For bulk, the medial surface for locking claw is with the arcwall face that locking teeth, lateral surface are that overall diameter becomes larger from top to bottom
And it can be slidably connected with the medial surface of the drive ring；It is characterized by:
The medium position of generally vertical columnar structured of the connection ontology, the connection body height direction is equipped with along diameter
To perforative claw mounting hole, sliding plug has the locking clamp pawl in the claw mounting hole, and in the circumference of connection ontology
At least two claw mounting holes are arranged at intervals on direction；The drive ring is slidably socketed outside the connector body
Portion, and the lateral surface of the drive ring is equipped with a circle driving bulge loop of radially evagination；
It further include support ring, the support ring is generally coaxially fixedly mounted on the circular ring shape knot of the connector body lower end surface
Structure, and the interior diameter of the support ring is more than or equal to the interior diameter of the connector body lower end, the support ring and above-mentioned drive
It employs bulge loop to face, and the support ring and the driving liquid being provided between bulge loop for driving hydraulic cylinder fixed installation
Cylinder pressure installation position.
2. subsea wellhead connector according to claim 1, it is characterised in that: further include driving guide frame, the drive
Action-oriented structure includes guide groove and guide runner；The guide groove, which is located in the short transverse of the connector body, is located at lock
Lateral surface below tight claw, and the guide groove is the axially extending straight bathtub construction along the connector body；It is described
The lower end of drive ring is fixed with the guide runner, and the inner end sliding plug on the guide runner in drive ring radially
In the guide groove.
3. subsea wellhead connector according to claim 1 or 2, it is characterised in that: it further include well head connection guide frame,
The well head connection guide frame includes guide cylinder；The upper section of the guide cylinder be and the homoaxial cylinder of the connector body
Shape structure, and it is fixed on the lower surface of the support ring；The interior diameter of the upper section of the guide cylinder is more than or equal to the connector
The interior diameter of ontology lower end；The lower section of the guide cylinder is the taper barrel structure that interior diameter becomes larger from top to bottom.
4. subsea wellhead connector according to any one of claim 1 to 3, it is characterised in that: further include drive ring lock
Tight mechanism, the drive ring retaining mechanism include a locking level, two pieces of double team blocks and connection bolt；
The lower end of the locking level is fixed on the upper surface of the support ring, and the upper section of the locking level, which runs through and is higher than driving, to be used
Bulge loop and lateral surface have locking double wedge；
Two pieces of double teams block transverse direction face, and the medium position of right opposite is to be connected with the outside face contact of the upper section of locking level
Circular groove, two pieces sandwich blocks between by be located at circular groove both sides connection bolt be fixedly linked；Described two pieces
The lower end surface of block is sandwiched as the abutting face for pushing against driving bulge loop upper surface.
5. subsea wellhead connector according to any one of claim 1 to 4, it is characterised in that: further include locking claw
Position limiting structure, the locking claw position limiting structure includes guide and limit pin, plug and pressure spring；
The upper surface of the locking claw is equipped with the groove radially extended along connector body, and the groove is in radial inside
End is open end, and outboard end is closed end；The upper surface of the connector body be provided through be connected to the groove it is logical
Hole, the bottom of the through-hole are inserted with the guide and limit pin, the lower end grafting of the guide and limit pin in the groove, institute
It states and is fixed with the plug at the top of through-hole, abutting before the upper surface of the plug and the guide and limit pin has the pressure
Spring.
6. a kind of subsea wellhead connector pilot system, it is characterised in that: the subsea wellhead connector is claim 1 to 5
Any one of described in subsea wellhead connector, the pilot system include testing stand, test pile, closure connector, driving liquid
Cylinder pressure and test hydraulic system；
The test pile is cylindric and constitutes test water well head in sea, and the upper section lateral surface of the test pile has for locking
The annular slot that the locking teeth of claw is caught in；The test pile lower end is fixed on the upper surface of the testing stand；
The closure is generally cylindric with connector, and described block is sealed with the upper end of connector and the connector body
It is fixedly linked；And the outer surface of cupular part of closure connector is additionally provided with static pressure test interface, the static pressure test is used
Hydraulic interface can be connected to the static pressure test hydraulic interface with the connector body inside；
The driving hydraulic cylinder is fixedly mounted on the hydraulic cylinder installation position；
The test hydraulic system includes hydraulic control valve, and the hydraulic control valve has and connecing in the driving hydraulic cylinder
The hydraulic interface that mouth and the static pressure test are respectively communicated with interface.
7. subsea wellhead connector pilot system according to claim 6, it is characterised in that: further include axis pulling block, axis drawing
With hydraulic cylinder and resistance strain gage；
It is fixedly linked between the lower end surface of the axis pulling block and the upper surface of closure connector, and the axis pulling block is justified along itself
The lateral surface evagination of circumferential direction is formed with the axis drawing bulge loop of a circle Yu driving bulge loop face；
Driving bulge loop and axis drawing are drawn with the axis drawing hydraulic cylinder, the axis is fixedly installed between bulge loop and are used hydraulic cylinder
On interface be connected by pipeline with corresponding control interface on the hydraulic control valve；
The lateral surface of closure connector and the lateral surface of test pile are respectively along the circumferential direction fixedly installed with multiple resistance
Foil gauge, multiple resistance strain gages pass through cable respectively and are connected with interface corresponding in data collection system.
8. subsea wellhead connector pilot system according to claim 7, it is characterised in that: further include displacement sensor,
Curved pressure arm and hydraulic jack；
Circumferencial direction between the drive ring and support ring along connector body is arranged at intervals with multiple displacement sensors, multiple
Displacement sensor passes through cable respectively and is connected with interface corresponding in data collection system；
One end of the curved pressure arm is fixedly linked with the axis pulling block, and the curved pressure arm horizontal extension extends to subsea wellhead connector
The outside of vertical projection simultaneously forms top splenium；
The outer end of the piston rod of the hydraulic jack is vertically upward and for top splenium described in ejection.
9. subsea wellhead connector pilot system according to claim 7 or 8, it is characterised in that: axis pulling block upper end
It is fixedly linked by flange and bolt with the curved pressure arm.
10. a kind of subsea wellhead connector test method, which is characterized in that using water described in any one of claim 6 to 9
Lower wellhead connector pilot system.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112985710A (en) * | 2021-02-28 | 2021-06-18 | 西南石油大学 | Automatic compressing device for aerospace high-pressure fluid connector and under-pressure testing method |
| CN113702016A (en) * | 2021-08-26 | 2021-11-26 | 中海石油(中国)有限公司 | Remote control device for land expansion test of underwater wellhead |
| CN114112207A (en) * | 2021-12-06 | 2022-03-01 | 中国船舶科学研究中心 | Load applying device for sealing test of underwater connection sealing structure |
| CN114459785A (en) * | 2021-11-17 | 2022-05-10 | 中国海洋石油集团有限公司 | Integrated testing device for deepwater drilling and completion system and using method thereof |
| CN114991698A (en) * | 2022-05-31 | 2022-09-02 | 中海油研究总院有限责任公司 | Testing system and method for downhole wellhead connector in locking state |
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| CN114991698B (en) * | 2022-05-31 | 2024-05-03 | 中海油研究总院有限责任公司 | System and method for testing underwater wellhead connector in locking state |
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