CN103993846B - A kind of mudline hanger - Google Patents
A kind of mudline hanger Download PDFInfo
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- CN103993846B CN103993846B CN201410162405.5A CN201410162405A CN103993846B CN 103993846 B CN103993846 B CN 103993846B CN 201410162405 A CN201410162405 A CN 201410162405A CN 103993846 B CN103993846 B CN 103993846B
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- ring
- hanger
- middle level
- limb
- internal layer
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Abstract
A kind of mudline hanger, middle level hanger is provided with the left hand thread for connecting, and inside middle portion forms inverted cone-shaped seat stand structure, and lateral surface has the step on a band inclined-plane, and step suit ring landing ring, spacing ring is placed in the semi-circular recesses of step.Ring landing ring is seated at the suspension platform of outer layer hanging head, the uniform multiple axial vertical slots in outside.Internal layer hanger has the guiding conical surface；Limb landing ring, shearing ring, enhancing ring and jump ring are sleeved on below the guiding conical surface successively.The flexible limb of limb landing ring, seat platform structure；Jump ring holds enhancing ring, and enhancing ring holds limb landing ring.When entering to middle level hanger under the limb landing ring of contraction state, limb opens the most voluntarily, it is not necessary to extra equipment provides installs power source, just can sit safely and reliably on the inverted cone-shaped seat stand being hung on media layer damage, there is obvious superiority, be more suitable for offshore drilling and install.Every Rotating fields is designed with sealing, and is provided with annular space and seals between internal layer and media layer damage.
Description
Technical field
The present invention provides a kind of mudline hanger being applicable to shallow water along the coast oil and gas wellhead device.
Background technology
Exploitation shallow sea area oil gas, original land wellhead assembly is inapplicable, and it is sufficiently expensive in the wellhead assembly price of deep-sea marine usage, therefore, need to develop a kind of new wellhead assembly to solve this contradiction, reaching the most practical but also economic purpose, mudline hanger is one of vitals in wellhead assembly.On market, the product of this type of mudline hanger existing occurs, but there are some defects.Such as, although the trapezoidal thread itself between these mudline hangers each layer pipeline possesses certain sealing function, but it is the absence of special containment member, is only applicable in lower pressure environment, and under environment under high pressure, often can produce leakage；The most such as, should be relatively fixed between mudline hanger each layer pipeline, the parts installation playing fixation should respond sensitive the most quick, but existing mudline hanger only relies on screw thread and is tightened, also need to additionally provide supporting torque power source, bringing inconvenience to Attention problems operation, expense increases.
Summary of the invention
For solving drawbacks described above present in prior art, the present invention proposes the mudline hanger of a kind of wellhead assembly being applicable to shallow sea area.
The present invention uses following technical proposal: a kind of mudline hanger, has outer layer, middle level and three stepped constructions of internal layer；Wherein the upper end trocar sheath of layer structure is connected with lower end trocar sheath right-handed thread, and outer layer hanging head is welded in the trocar sheath of lower end, and outer layer hanging head inwall has a circle inwardly protruded suspension platform；It is characterized in that:
Middle level hanger upper inner in media layer damage is provided with the left hand thread for connecting, lower inside is provided with right-handed thread and connects lower end middle sleeve, inside middle portion formation inverted cone-shaped seat stand structure, outside middle portion corresponding to inverted cone-shaped seat stand gradually tapers up downwards the step on one band inclined-plane of formation, step one ring landing ring of suit, a spacing ring is had to be placed in the semi-circular recesses of step under ring landing ring, the uniform multiple axial vertical slots in outside of ring landing ring, ring landing ring is seated on the suspension platform of outer layer hanging head inwall；
The internal layer hanger upper inner of endothecium structure is provided with the left hand thread for connecting, lower inside is provided with right-handed thread and connects lower end inner sleeve, has the guiding conical surface outside middle part；Limb landing ring, shearing ring, enhancing ring and jump ring are sleeved on below the guiding conical surface successively: limb landing ring is the loop configuration having fracture, and its top is the flexible flaps can shunk or open, and flexible flaps is provided with seat platform structure；The shearing ring being divided into two semi-rings is placed in the rectangle annular groove of limb landing ring inner wall lower；Being uniformly distributed pin hole on the ring week of shearing ring, internal layer hanger is provided with corresponding pin hole, during shear pin inserts in the pin hole of shearing ring and extends to the pin hole of internal layer hanger；Enhancing ring and jump ring load and are positioned at the rectangle annular groove set by internal layer hanger below limb landing ring, the inner side of enhancing ring be two layers stepped, jump ring holds enhancing ring, enhancing ring and then hold limb landing ring.
Separately, the upper strata ladder of above-mentioned enhancing ring is provided with the guide ramp of support limb landing ring.
The present invention compared with prior art has obvious good effect, is embodied in endothecium structure especially and sits the process hanging media layer damage.It is in the limb landing ring of contraction state, enter under the pipeline of media layer damage, when walking to middle level hanger, limb opens the most voluntarily, need not extra equipment and installation power source is provided, whole endothecium structure just can be sat on the inverted cone-shaped seat stand being hung on media layer damage safely and reliably, relatively uses the seat of helicitic texture to hang mode and has obvious superiority, is more suitable for offshore drilling and installs.It addition, be not that employing is existing between each layer of this mudline hanger only rely on the offer sealing of special trapezoidal thread, but every Rotating fields is designed with sealing, and is provided with annular space sealing between internal layer and media layer damage；Meanwhile, three stepped construction connection modes of mudline hanger are identical, operate relatively easy, and flexibly.Drilling well completes to exit down instrument, and if gone into operation the most at once, available mudline hanger abandoned well component is shunt in a well；As needed to go into operation, the most replaceable one-tenth mudline hanger tie-back system.
Accompanying drawing explanation
Fig. 1 is to enter the form schematic diagram after completion installed by instrument under the present invention.
Fig. 2 is the layer structure schematic diagram in Fig. 1.
Fig. 3 is the media layer damage schematic diagram in Fig. 1.
Fig. 4 is ring landing ring 7 structural representation in Fig. 3.
Fig. 5 is to enter the schematic diagram not put in place under the endothecium structure in Fig. 1.
Fig. 6 is limb landing ring 6 structural representation in Fig. 5.
Fig. 7 is the top view of Fig. 6.
Fig. 8 is shearing ring 9 structural representation in Fig. 5.
Fig. 9 is enhancing ring 10 structural representation in Fig. 5.
Figure 10 is to enter the schematic diagram put in place under the endothecium structure in Fig. 1.
In figure, each sequence number is expressed as: 1. sealing member, 2. jump ring；3. block；4. sealing member；5. sealing member；6. limb landing ring；7. ring landing ring；8. spacing ring；9. shearing ring；10. enhancing ring；11. jump rings；12. outer layer hanging heads；13. jump rings；14. blocks；15. sealing members；16. middle level hangers；17. internal layer hangers；Instrument is entered under 18. middle levels；Instrument is entered under 19. internal layers；20. vertical slots；21. rectangle annular grooves；22. fractures；23. sit platform structure；24. flexible flaps；26. inverted cone-shaped seat stands；27. shear pins；28. upper end inner sleeves；29. lower end inner sleeves；30. upper end middle sleeves；31. lower end middle sleeves；32. upper end trocar sheaths；33. lower end trocar sheaths；34. right-handed threads；35. hang platform；36. guide the conical surface；37. left hand threads；38. is domatic；39. pin holes；40. semicircle grooves；41. right-handed threads；42. left hand threads；43. band incline benches；44. right-handed threads.
Detailed description of the invention
It is further described below in conjunction with the embodiment of the present invention and accompanying drawing thereof.
With reference to the embodiment of the present invention shown in Fig. 1, a kind of mudline hanger, overall have outer layer, middle level and three stepped constructions of internal layer in stepped construction, and installation process is from outside to inside.
On drilling platforms, preliminary drilling well is to assembling layer structure during certain depth.Referring concurrently to Fig. 2, outer layer hanging head 12 is welded in lower end trocar sheath 33, and the upper end trocar sheath 32 of layer structure is connected with lower end trocar sheath 33 right-handed thread 34, and outer layer hanging head 12 inwall has a circle inwardly protruded suspension platform 35.Under enter this layer structure after, outside fasten with cement.
After layer structure fastens, enter instrument under the middle level of use preparation and enter media layer damage 18 times.Referring concurrently to Fig. 3, upper end middle sleeve 30 is connected with right-handed thread with entering instrument 18 under middle level.Middle level hanger 16 upper inner is provided with and at shut-in well or then connects middle level capping or middle level tieback sub for left hand thread 37(connected during tieback) connect enter instrument 18 under middle level, lower inside is provided with that right-handed thread 41 connects lower end middle sleeve 31, inside middle portion forms inverted cone-shaped seat stand 26 structure, gradually tapers up downwards the step 43 forming a band inclined-plane corresponding to the outside middle portion of inverted cone-shaped seat stand 26.Step 43 is set with a ring landing ring 7, has a spacing ring 8 to be placed in the semi-circular recesses 40 of step 43 under ring landing ring 7, and the limited ring of ring landing ring 78 is fixed.See that Fig. 4 shows, the uniform multiple axial vertical slots 20 in outside of ring landing ring 7.With enter under middle level instrument enter media layer damage 18 times when, ring landing ring 7 is seated on the suspension platform 35 of outer layer hanging head 12 inwall.It addition, enter upper and lower end inside instrument 18 under middle level to be respectively arranged with identical sealing together, upper end seals and is made up of jump ring 2, block 3, sealing member 4, and lower end seals and is made up of jump ring 13, block 14, sealing member 15.Sealing member 4,15 relies on baffle ring 3,14 to be fixed in the draw-in groove (not marking in figure) entering instrument 18 under middle level by jump ring 2,13, it is achieved internal layer seals with middle level annular space.Meanwhile, middle level hanger 16 upper end seals 5 together with the junction entering instrument 18 under middle level has, the sealing effectiveness that reinforcement is the most threaded.Enter after installing under media layer damage, from drilling rod from bottom to top to injecting cement between outer layer and middle level, cement can enter the space between the outer layer on outer layer hanging head 12 top and media layer damage by the vertical slot 20 of ring landing ring 7 so that is fixed between the middle level hanger 16 of the outer layer hanging head 12 of layer structure, upper end trocar sheath 32, lower end trocar sheath 33 and media layer damage, upper end middle sleeve 30, lower end middle sleeve 31.
After media layer damage completes to send into and fasten, enter instrument under the internal layer of use preparation and enter endothecium structure 19 times.Refer again under Fig. 5 to Figure 10, internal layer, enter instrument 19 be connected with right-handed thread with upper end inner sleeve 28.Internal layer hanger 17 upper inner is provided with and at shut-in well or then connects internal layer capping or internal layer tieback sub for left hand thread 42(connected during tieback) connect and enter instrument 19 under internal layer；Enter under its top and internal layer between instrument 19 equipped with sealing member 1 for making up the deficiency of thread seal, prevent leakage；It is provided with right-handed thread 44 inside its underpart and connects lower end inner sleeve 29；In the middle part of it, there is the guiding conical surface 36 in outside.Limb landing ring 6, shearing ring 9, enhancing ring 10 and jump ring 11 are sleeved on below the guiding conical surface 36 of internal layer hanger 17 successively.As shown in Figure 6, Figure 7, limb landing ring 6 is the loop configuration having fracture 22, its top is the flexible flaps 24 can shunk or open, when outside stress, limb landing ring 6 can produce significantly to contract, when external force progressively removes, can progressively reply again, when power loads on inner side, can the most significantly strut again.Flexible flaps 24 is provided with seat platform structure 23 and coordinates with the inverted cone-shaped seat stand 26 of middle level hanger 16.The shearing ring 9 being divided into two semi-rings is placed in the rectangle annular groove 21 of limb landing ring 6 inner wall lower.As shown in Figure 8, being uniformly distributed pin hole 39 the ring week of shearing ring 9, internal layer hanger 17 is provided with corresponding pin hole (not shown), during shear pin 27 inserts in the pin hole 39 of shearing ring 9 and extends to the pin hole of internal layer hanger 17.Enhancing ring 10 and jump ring 11 loading are positioned at the rectangle annular groove (not shown) set by internal layer hanger 17 below limb landing ring 6, the inner side of enhancing ring 10 be two layers stepped, as it is shown in figure 9, the upper strata ladder of enhancing ring 10 is provided with the guide ramp 38 of support limb landing ring 6.Jump ring 11 holds enhancing ring 10, enhancing ring 10 and then hold limb landing ring 6.
Before entering under endothecium structure, first shearing ring 9 is installed in the rectangular channel 21 of limb landing ring 6 bottom, then is inserted in the appropriate location of internal layer hanger 17 as entirety.Then installing enhancing ring 10 and hold limb landing ring 6, the guide ramp 38 of enhancing ring 10 inside upper part can guide righting limb landing ring 6, then holds enhancing ring 10 being positioned at the loading jump ring 11 of the rectangular channel (not shown) below limb landing ring 6.Then rotate limb landing ring 6, at the fracture 22 of limb landing ring 6, shear pin 27 is inserted one by one the pin hole 39 of shearing ring 9 and extends to pin hole (not shown) fixed shear ring 9 corresponding on internal layer hanger 7.
When entering endothecium structure under the tube wall of media layer damage, limb landing ring 6 is successively by the effect entering instrument 18 under upper end middle sleeve 30 and middle level, flexible flaps 24 is in contraction state, time at middle level hanger 16, space increases, the rapid resilience of flexible flaps 24 is opened, and the seat platform structure 23 outside limb landing ring 6 is seated on inverted cone-shaped seat stand 26.Along with entering under continuing, limb landing ring 6 enters under being stoped by inverted cone-shaped seat stand 26, and shear pin 27 is cut off, and flexible flaps 24 is constantly strutted and presses to inverted cone-shaped seat stand 26 by the guiding conical surface 36 outside internal layer hanger 17, finally makes endothecium structure hang on media layer damage.Enter after installing under endothecium structure, by drilling rod from bottom to top to injecting cement between middle level and internal layer, cement can enter the space between instrument 18 by entering at limb landing ring 6 fracture 22 under limb landing ring 6 and middle level so that media layer damage is fixed with endothecium structure.
After outer layer, middle level, endothecium structure enter down and fix, then screw out under middle level to enter under instrument 18 and internal layer, to enter instrument 19.If being forbidden upper oil recovery of saddling a horse for riding, then capping can be used to enter instrument under substituting and temporarily shunt in a well；If come into operation at once, then tieback sub can be used to enter instrument under substituting, receive platform via intermediate link.No matter shut-in well or tieback, capping or tieback sub should have the identical sealing structure entering between instrument with outer layer, middle level, endothecium structure as follows.
Claims (5)
1. a mudline hanger, has outer layer, middle level and three stepped constructions of internal layer；Wherein the upper end trocar sheath of layer structure is connected with lower end trocar sheath right-handed thread, and outer layer hanging head is welded on lower end trocar sheath, and outer layer hanging head inwall has a circle inwardly protruded suspension platform；It is characterized in that:
Middle level hanger upper inner in media layer damage is provided with the left hand thread for connecting, lower inside is provided with right-handed thread and connects lower end middle sleeve, inside middle portion formation inverted cone-shaped seat stand structure, outside middle portion corresponding to inverted cone-shaped seat stand gradually tapers up downwards the step on one band inclined-plane of formation, step one ring landing ring of suit, a spacing ring is had to be placed in the semi-circular recesses of step under ring landing ring, the uniform multiple axial vertical slots in outside of ring landing ring, ring landing ring is seated on the suspension platform of outer layer hanging head inwall；
The internal layer hanger upper inner of endothecium structure is provided with the left hand thread for connecting, lower inside is provided with right-handed thread and connects lower end inner sleeve, has the guiding conical surface outside middle part；Limb landing ring, shearing ring, enhancing ring and jump ring are sleeved on below the guiding conical surface successively: limb landing ring is the loop configuration having fracture, and its top is the flexible flaps can shunk or open, and flexible flaps is provided with seat platform structure；The shearing ring being divided into two semi-rings is placed in the rectangle annular groove of limb landing ring inner wall lower；Being uniformly distributed pin hole on the ring week of shearing ring, internal layer hanger is provided with corresponding pin hole, during shear pin inserts in the pin hole of shearing ring and extends to the pin hole of internal layer hanger；Enhancing ring and jump ring load and are positioned at the rectangle annular groove set by internal layer hanger below limb landing ring, the inner side of enhancing ring be two layers stepped, jump ring holds enhancing ring, enhancing ring and then hold limb landing ring.
Mudline hanger the most according to claim 1, it is characterised in that the upper strata ladder of enhancing ring is provided with the guide ramp of support limb landing ring.
Mudline hanger the most according to claim 1 and 2, it is characterised in that media layer damage is by entering under middle level to enter under instrument, and the middle level hanger upper inner of media layer damage is provided with under the left hand thread connection middle level for connecting and enters instrument；Endothecium structure is by entering under internal layer to enter under instrument, and internal layer hanger upper inner is provided with under the left hand thread connection internal layer for connecting and enters instrument.
Mudline hanger the most according to claim 3, it is characterized in that entering upper and lower end inside instrument under middle level is respectively arranged with identical sealing together, per pass seals and is made up of jump ring, block, sealing member, sealing member relies on baffle ring to be fixed on by jump ring in the draw-in groove entering instrument under middle level, it is achieved internal layer seals with middle level annular space.
Mudline hanger the most according to claim 3, it is characterised in that hanger upper end, middle level is provided with the junction entering instrument under middle level as sealing together with the most threaded sealing effectiveness of reinforcement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410162405.5A CN103993846B (en) | 2014-04-22 | 2014-04-22 | A kind of mudline hanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410162405.5A CN103993846B (en) | 2014-04-22 | 2014-04-22 | A kind of mudline hanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103993846A CN103993846A (en) | 2014-08-20 |
| CN103993846B true CN103993846B (en) | 2016-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410162405.5A Expired - Fee Related CN103993846B (en) | 2014-04-22 | 2014-04-22 | A kind of mudline hanger |
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| Country | Link |
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| CN (1) | CN103993846B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989314B (en) * | 2015-06-12 | 2017-10-20 | 美钻能源科技(上海)有限公司 | Mud line production tree and its installation method under water |
| CN119507842A (en) * | 2025-01-20 | 2025-02-25 | 威飞海洋装备制造有限公司 | A casing mudline suspension system and its delivery method and use method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4577686A (en) * | 1984-04-26 | 1986-03-25 | Vetco Offshore, Inc. | Mudline support hanger assembly |
| US4580630A (en) * | 1984-08-20 | 1986-04-08 | Vetco Offshore, Inc. | Mudline casing hanger assembly |
| US6196336B1 (en) * | 1995-10-09 | 2001-03-06 | Baker Hughes Incorporated | Method and apparatus for drilling boreholes in earth formations (drilling liner systems) |
| CN203822222U (en) * | 2014-04-22 | 2014-09-10 | 美钻能源科技(上海)有限公司 | Mud line hanger |
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2014
- 2014-04-22 CN CN201410162405.5A patent/CN103993846B/en not_active Expired - Fee Related
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| CN103993846A (en) | 2014-08-20 |
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