CN202520302U - Underwater wellhead system load test device - Google Patents
Underwater wellhead system load test device Download PDFInfo
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- CN202520302U CN202520302U CN2012200764083U CN201220076408U CN202520302U CN 202520302 U CN202520302 U CN 202520302U CN 2012200764083 U CN2012200764083 U CN 2012200764083U CN 201220076408 U CN201220076408 U CN 201220076408U CN 202520302 U CN202520302 U CN 202520302U
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- mobility aid
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- well head
- crossbeam
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Abstract
The utility model discloses an underwater wellhead system load test device. A portal type frame is arranged above a building pit; a horizontal sliding part is arranged on the crossbeam of the portal type frame, a vertical mobility aid is arranged on the horizontal sliding part, and a horizontal mobility aid is arranged at one side of the horizontal sliding part; an analog underwater wellhead guide tube pile is arranged in the building pit, and an analog wellhead system is fixed in the portal type frame through the guide tube pile; the top of the marine riser of the analog wellhead system is spherically hinged with the bottom of the vertical mobility aid; and the bottom of the marine riser is spherically hinged with the blowout preventer of the analog wellhead system. The cyclic loads of drilling ship or platform drift, marine riser movement and the tensioning force on the marine riser under the load effect of marine environment can be stimulated through the test device so as to exposit the influence rules and sensibility of various factors on the underwater wellhead stability and guide tube bearing capacity.
Description
Technical field
The utility model relates to analogue experiment installation, especially simulates the experimental rig of the underwater well head stability of a system of deepwater drilling.
Background technology
The undiscovered offshore oil and gas reserves in the whole world have 90% to hide in the depth of water above the stratum below the 1000m, so the deepwater drilling technical level is concerning the paces of deep-sea oil gas exploration and development.For the ocean deepwater drilling engineering, the drilling environment condition becomes complicated more with the increase of the depth of water, occur the technical barrier that conventional drilling engineering is difficult to overcome easily, so the development of deepwater drilling technology is the key factor that influences the future petroleum development.
At present; The underwater well head system that adopts during deepwater drilling generally is made up of drilling water-separation pipe, preventer and well head head, and the active force that underwater well head bears during deepwater drilling mainly is freed from the gravity of vertical and horizontal counter-force, blowout preventer set and the suspension sleeve string at marine riser bottom fitting place, the horizontal wave current power that acts on blowout preventer set and well head, submarine soil layer to the vertical and lateral resistance of sleeve pipe etc.The acting in conjunction of these active forces possibly cause that well head sink or tilt, and will deposit when the moment of flexure value of bearing when well head exceeds design limit to wreck.
The matter of utmost importance of aspect construction operation, facing is exactly where to dig a well, the problem of well site, seabed selection just.The selection in well site, seabed often will be faced following problem: 1) the marine drilling riser horizontal direction receives the effect of complicated ocean current power, wave force and other power; Therefore; Need carry out stability analysis to well head; Whether judgement can topple under the effect of horizontal loads such as stormy waves stream, unstability, and the interaction between conduit-seafloor soil has determined the horizontal corresponding problem of well head.But the seafloor soil characteristic variations is various, and to sandy silt, silty fine sand, medium sand and coarse sand etc., and in different sea areas, marine site, native characteristic also has very big difference from bury, silty clay, stiff clay.Therefore, the seafloor soil of research different qualities is to the influence of conduit transverse response, and the stability analysis of conduit is had great importance.2) A/C problem how safely and effectively.Deepwater drilling often will be installed in the subsea blow out preventer of tens tons even up to a hundred tons on the conduit in seabed, so can whether the attribute on stratum can be the prerequisite that carry out follow-up construction operation safely for preventer provides support near the seabed tube.Therefore in the weight capacity of carrying out to consider emphatically when the well site is selected conduit and stratum, guarantee follow-up wellbore construction safety.3) depth of setting of conduit is shallow excessively, then possibly cause accidents such as the sagging unstability of casing string; If depth of setting is excessive, then cause waste economically.So need carry out computational analysis to the conduit supporting capacity, definite method of research conduit depth of setting.4) because deep water seabed situation is complicated, more than several kinds of situation tend to occur simultaneously, therefore will be according to field datas such as geologic informations, a kind of scientific and reasonable constructure scheme is selected in balance, guarantees carrying out smoothly of wellbore construction.
Though external relevant document has proposed the stability problem that well head exists, and does not set up to this theory problem analytical method.Simultaneously, because marine environment load directly affacts on underwater well head and the following casing string thereof the dynamic response of marine riser, need the influence of research trends factor to well head stability, this respect is not seen the pertinent literature report.
Summary of the invention
The utility model provides a kind of on-the-spot underwater well head system loads experimental rig of deepwater drilling of simulating.This experimental rig is to the deepwater drilling characteristics; Can simulate influence such as riser top tensile force, drill ship drift value, marine riser swing displacement, deviation angle and subgrade reaction etc. to the mechanical property and the stability of underwater well head, conduit system; Can carry out model testing to the well head mechanical stability and the conduit supporting capacity of deepwater drilling, disclosing various factors influences rule and sensitiveness to underwater well head stability and conduit supporting capacity.
For achieving the above object; The technical scheme that the load testing machine of the utility model is taked: it is above a foundation ditch, to be provided with a portal; Described portal be on two vertical columns, be equipped with can be up and down crossbeam; On the crossbeam of portal horizontal sliders is installed, horizontal sliders is made up of upper plate, lower plate and two vertical pull bars, and the position that upper and lower plate contacts with crossbeam is equipped with rolling bearing; The vertical mobility aid that applies vertical tension or pressure is installed on the horizontal sliders, and a side of horizontal sliders is equipped with the horizontal mobility aid that promotes the sliding part back and forth movement; Be provided with the underwater well head conduit stake of simulation in the foundation ditch, the simulation well port system be fixed in the portal through the conduit stake; The simulation well port system is made up of marine riser, underwater well head and the preventer of simulation; Marine riser top and the vertical ball-joint of mobility aid bottom, the bottom of marine riser and preventer ball-joint.
Above-mentioned horizontal mobility aid is hydraulic cylinder with vertical mobility aid, and is controlled by hydraulic servo control system.
In order to reach better simulate effect, the installation relation preference between the utility model horizontal sliders and vertical mobility aid and the crossbeam is selected following two kinds of situation for use:
The one: horizontal sliders is enclosed within on the portal crossbeam, and the base of vertical mobility aid is connected on the lower plate of horizontal sliders, thereby vertical mobility aid is fixed on the horizontal sliders.
The 2nd: the base of vertical mobility aid is as the upper plate of horizontal sliders, and vertical mobility aid passes crossbeam and horizontal sliders lower plate, thereby vertical mobility aid is fixed on the horizontal sliders.
The test method of above-mentioned experimental rig is following:
The first step: at the foil gauge along measurement axial load and horizontal loading in the symmetry laying on the pipe range direction of the underwater well head conduit stake of simulating;
Second step: the soil body that preparation is to be tested is filled out in foundation ditch, and the underwater well head conduit stake of simulation is imbedded in this soil;
The 3rd step: crossbeam is moved down; Make vertical mobility aid and conduit stake top contact, fixed cross beam, vertical mobility aid increases load step by step; Simulate preventer weight; And the pile strain of conduit stake in the test loading procedure, and load---the sedimentation relation curve on conduit stake top, confirm that the vertical bearing capacity of conduit pile foundation reaches the settling amount of well head under load action;
The 4th step: certain altitude is also fixing with moving on on the crossbeam, connection well port system and marine riser, and riser top links to each other with vertical mobility aid through ball pivot; With vertical mobility aid well head system is applied certain stretching force, carry out cyclical level with horizontal mobility aid simultaneously and load, the motion of offshore boring island and marine riser under the simulation wave current load action;
The 5th step: in above-mentioned steps, measure the displacement at preventer ball pivot place and the horizontal movement of corner and conduction pipe pile foundation;
The 6th step: survey data is analyzed the stability of evaluation well head system model.
The utility model has the advantages that: the utility model carries out model testing to the well head mechanical stability and the conduit supporting capacity of deepwater drilling; Can simulate the stretching force on cyclic loading such as drill ship or platform drift, marine riser motion under the marine environment loading and the marine riser; Disclosed various factors to underwater well head stability and conduit supporting capacity influence rule and sensitiveness, mainly show:
1. apply vertical simultaneously and level to load, the simulated field loading condition carries out the whole coupling response analysis of marine riser, preventer, underwater well head system, conduit pile foundation and soil body effect;
2. under the simulation loop horizontal loads, the generation in contact surface gap is with closed between the conduit pile foundation and the soil body, and under the test loop load action, the horizontal movement and the load at well head head place obtain the horizontal drag degenerated curve of conduit pile foundation;
3. obtain under the different stretching force effects, the relation curve between marine riser bottom ball pivot corner and horizontal loading has directive significance to instructing on-the-spot marine riser to apply stretching force to the influence of bottom ball pivot corner
In a word, exploitation provides technical support to the utility model to the petroleum resources of deep water sea area, for the stability analysis of the well head system of marine drilling provides foundation.
Description of drawings
Fig. 1 is the sketch map of underwater well head system loads experimental rig embodiment;
Fig. 2 is the structural representation of horizontal sliders and crossbeam junction embodiment one.
Fig. 3 is the structural representation of horizontal sliders and crossbeam junction embodiment two.
Marginal data, 1-foundation ditch, 2-crossbeam, 3-sliding bearing, 4-horizontal sliders; The vertical mobility aid of 5-, the horizontal mobility aid of 6-, 7-marine riser, 8-well head and preventer, 9-foil gauge; The stake of 10-conduction pipe, 11-hydraulic servo control system, 12-upper plate, 13-lower plate, the vertical pull bar of 14-.
The specific embodiment
The load testing machine of the utility model is provided with a portal above a foundation ditch 1; Described portal be on two vertical columns, be equipped with can be up and down crossbeam 2; The crossbeam 2 of portal is provided with horizontal sliders 4; Horizontal sliders 4 is made up of upper plate 12, lower plate 13 and two vertical pull bars 14, is equipped with rolling bearing 3 on position that lower plate 13 contacts with crossbeam 2 bottom surfaces and upper plate 12 and the position that crossbeam 2 end faces contact; The vertical mobility aid 5 that applies pressure at right angle is installed on the horizontal sliders 4, and a side of horizontal sliders 4 is equipped with the horizontal mobility aid 6 that promotes sliding part 4 back and forth movements; Be provided with the underwater well head conduit stake 10 of simulation in the foundation ditch 1, the simulation well port system be fixed in the portal through conduction pipe stake 10; The simulation well port system is made up of marine riser 7, well head and the preventer 8 of simulation; Marine riser 7 tops and vertical mobility aid 5 bottom ball-joints, the bottom of marine riser 7 and well head and preventer 8 ball-joints.
Above-mentioned horizontal mobility aid 6 is hydraulic cylinder with vertical mobility aid 5, and controls (not drawing among the figure) by hydraulic servo control system.
Installation relation between horizontal sliders 4 and vertical mobility aid 5 and the crossbeam 2 is seen Fig. 2 and Fig. 3;
Embodiment one: horizontal sliders 4 is enclosed within on the portal crossbeam 2, and the base of vertical mobility aid 5 is connected on the lower plate 13 of horizontal sliders 4, thereby vertical mobility aid 5 is fixed on (see figure 2) on the horizontal sliders 4.
Embodiment two: the installation relation between horizontal sliders 4 and vertical mobility aid 5 and the crossbeam 2 is: the base of vertical mobility aid 5 is as the upper plate 12 of horizontal sliders 4; Vertical mobility aid 5 passes crossbeam 2 and horizontal sliders lower plate 13, thereby vertical mobility aid 5 is fixed on (see figure 3) on the horizontal sliders 4.
Above-mentioned horizontal mobility aid 6 is hydraulic cylinder with vertical mobility aid 5, and controls (not drawing among the figure) by hydraulic servo control system.
The test method of above-mentioned experimental rig is following:
The first step: at the foil gauge 9 along measurement axial load and horizontal loading in the symmetry laying on the pipe range direction of the underwater well head conduit stake 10 of simulating;
Second step: the soil body that preparation is to be tested is filled out in foundation ditch 1, and the underwater well head conduit stake 10 of simulation is imbedded in this soil;
The 3rd step: crossbeam 2 is moved down; Make vertical mobility aid 5 and underwater well head conduit stake 10 top contact, fixed cross beam 2, vertical mobility aid 5 increases load step by step; Simulate preventer weight; And the pile strain of conduit stake 10 in the test loading procedure, and load---the sedimentation relation curve on underwater well head conduit stake 10 tops, confirm that the vertical bearing capacity of conduit pile foundation reaches the settling amount of well head under load action;
The 4th step: certain altitude is also fixing with moving on on the crossbeam 2, connection well port system and marine riser 7, and marine riser 7 tops link to each other with vertical mobility aid 5 through ball pivot; Apply certain stretching force with 5 pairs of well head systems of vertical mobility aid, carry out cyclical level with horizontal mobility aid 6 simultaneously and load, the motion of offshore boring island and marine riser 7 under the simulation wave current load action;
The 5th step: in above-mentioned steps, measure the displacement at preventer ball pivot place and the horizontal movement of corner and conduction pipe pile foundation;
The 6th step: survey data is analyzed the stability of evaluation well head system model.
Claims (3)
1. underwater well head system loads experimental rig; It is characterized in that; It is provided with a portal above a foundation ditch, described portal be on two vertical columns, be equipped with can be up and down crossbeam, on the crossbeam of portal horizontal sliders is installed; Horizontal sliders is made up of upper plate, lower plate and two vertical pull bars; And the position that upper and lower plate contacts with crossbeam is equipped with rolling bearing, and the vertical mobility aid that applies vertical tension or pressure is installed on the horizontal sliders, and a side of horizontal sliders is equipped with the horizontal mobility aid that promotes the sliding part back and forth movement; Be provided with the underwater well head conduit stake of simulation in the foundation ditch, the simulation well port system be fixed in the portal through the conduit stake; The simulation well port system is made up of marine riser, underwater well head and the preventer of simulation; Marine riser top and vertical mobility aid bottom ball-joint, the bottom of marine riser and preventer ball-joint;
Above-mentioned horizontal mobility aid is hydraulic cylinder with vertical mobility aid, and is controlled by hydraulic servo control system.
2. underwater well head system loads experimental rig as claimed in claim 1 is characterized in that horizontal sliders is enclosed within on the portal crossbeam, and the base of vertical mobility aid is connected on the lower plate of horizontal sliders, thereby vertical mobility aid is fixed on the horizontal sliders.
3. underwater well head system loads experimental rig as claimed in claim 1; It is characterized in that; The base of vertical mobility aid is as the upper plate of horizontal sliders, and vertical mobility aid passes crossbeam and horizontal sliders lower plate, thereby vertical mobility aid is fixed on the horizontal sliders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200764083U CN202520302U (en) | 2012-03-02 | 2012-03-02 | Underwater wellhead system load test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200764083U CN202520302U (en) | 2012-03-02 | 2012-03-02 | Underwater wellhead system load test device |
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| CN202520302U true CN202520302U (en) | 2012-11-07 |
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| CN2012200764083U Expired - Lifetime CN202520302U (en) | 2012-03-02 | 2012-03-02 | Underwater wellhead system load test device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606139A (en) * | 2012-03-02 | 2012-07-25 | 中国石油大学(华东) | Underwater wellhead system load test device and test method thereof |
| CN109113717A (en) * | 2018-09-27 | 2019-01-01 | 中国石油大学(华东) | A kind of deep water gas hydrates well head stability experiment device and method |
-
2012
- 2012-03-02 CN CN2012200764083U patent/CN202520302U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606139A (en) * | 2012-03-02 | 2012-07-25 | 中国石油大学(华东) | Underwater wellhead system load test device and test method thereof |
| CN102606139B (en) * | 2012-03-02 | 2014-08-06 | 中国石油大学(华东) | Underwater wellhead system load test device and test method thereof |
| CN109113717A (en) * | 2018-09-27 | 2019-01-01 | 中国石油大学(华东) | A kind of deep water gas hydrates well head stability experiment device and method |
| CN109113717B (en) * | 2018-09-27 | 2023-10-13 | 中国石油大学(华东) | Deep water natural gas hydrate wellhead stability experimental device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121107 Effective date of abandoning: 20140806 |
|
| RGAV | Abandon patent right to avoid regrant |