A kind of novel annular space seal assembly deviceTechnical field
The utility model relates to oil well sealing device technical field, in particular to a kind of novel annular space seal assembly dressIt sets.
Background technique
Exploitation of offshore oil and gas refers to the activity in inland sea, continental shelf and deep-sea sea area exploitation oil and natural gas, including groundMatter research, engineering design, drilling well, acquisition, stores up the operations such as defeated at feasibility analysis.As the "Oceanic" strategy gradually develops to deep-sea, seaForeign oil and gas development is more and more flourishing, but offshore and gas development equipment is also in foreign technology monopolization at present, and annular space sealing isA component in offshore and gas development equipment, this equipment used on the market are all to rely on external import.To meDomestic deep water oil development seriously restricted, including their technical monopoly, cannot have in time to our technical supportIt imitates and expensive, the delivery cycle is long.And domestic just getting started, although Ye You producer of the country is sealed the mould of deviceIt is imitative, but from the market using the structure of these products from the point of view of, their product still cannot be acceptable to the market, and there are variousDesign defect.
The characteristics of existing some water-tight equipments is to squeeze elastomer under the effect of gravity using particulate metal, to promoteThe shortcomings that deformation of metal lip, realizes and seal, this design is particulate metal higher cost, and difficulty of processing is larger, and elasticityAfter body aging, lip, which can not support, may cause seal failure.
Based on above-mentioned Industry, device production cost and difficulty of processing can be reduced by being just badly in need of one kind, extend sealingService using life, the novel annular space seal assembly device of effective lift-off seal effect.
Utility model content
In view of problem above, the utility model, which provides one kind, can reduce device production cost and difficulty of processing, extend closeSeal apparatus service life, the novel annular space seal assembly device of effective lift-off seal effect.Its cardinal principle is exactly to utilize sealingThe inclination angle in face squeezes seal body deformation, to promote the sealing of the deformation realization metal to metal of seal point.
In order to realize above-mentioned purpose of utility model, the utility model the following technical schemes are provided:
A kind of novel annular space seal assembly device in the utility model, including well head head, casing hanger, lock ring, seal body,Inner lock rings, outer lock rings and sealing main body, the outer lock rings are set to the outer upper side of inner lock rings, and the seal body and sealing are ledBody fits connection, the lower part of the well head head is equipped with well head head top inner sealing surface and well head head lower part inner sealing surface, describedWell head head top inner sealing surface is additionally provided with platform in well head head in the surface of well head head lower part inner sealing surface, the well in wordThere are certain gradient in rank, the outside that described sleeve pipe is hung, and there is upper casing hanger sealing surface on the top that described sleeve pipe is hung and pipe hanger of trappingThe small contact surface in casing hanger lower part is arranged at sealing surface, the lower part that described sleeve pipe is hung, and the middle part that described sleeve pipe is hung is equipped with casing hanger step surface,
The seal body is equipped with upper seal point and lower seal point, and the upper seal point connects with upper casing hanger sealing surfaceTouching squeezes, and the lower seal point is in contact extruding with pipe hanger sealing surface of trapping, and the bottom of the seal body is equipped with lower salient point, instituteThe sealing of top finger-type and the sealing of lower part finger-type are arranged at the lower part for stating seal body, and the top finger-type sealing and lower part finger-type seal itBetween be additionally provided with elastomer, the top of the top finger-type sealing is the first seal point, and the top of the lower part finger-type sealing is theTwo seal points have oliquely downward inclined lock ring step surface, the lock ring step surface and outer lock rings step surface phase on the lock ringContact squeeze, the lower section of the lock ring step surface are lock ring outer surface, the lock ring outer surface and outer lock rings lubrication groove profile surfaceContact locking, the lock ring are equipped with lock ring middle part contact point and contact locking with sealing main body, and the lower part of the lock ring is successivelyEquipped with lock ring lubrication groove profile surface and lock ring leave from office terrace, the outer lock rings are equipped with step in outer lock rings top bar and well head head and cooperateIt squeezes, the inner lock rings are equipped with inner lock rings First terrace, inner lock rings outer surface and inner lock rings second step face, described interiorLock ring First terrace, inner lock rings outer surface and inner lock rings second step face are smooth contact surfaces.
Further, the seal body top has additional salient point and casing hanger contoured squeeze, the upper salient pointIn the presence of so that an aduncate trend is arranged at seal body lower part.The convex quantity on the seal body top is one.
Further, the seal body tightens the fixed company of matching by male thread and box thread with sealing main bodyIt connects.
Further, there are also bottom protection structures for the bottom of novel annular space seal assembly device, for increasing sealing effect.
Further, the well head head, casing hanger, lock ring, inner lock rings, outer lock rings, seal body and sealing main bodyMaterial selects corrosion-resisting alloy steel.
Advantages and beneficial effects of the utility model lie in that device production cost and difficulty of processing can be reduced by providing one kind,Extend seal life, the novel annular space seal assembly device of effective lift-off seal effect.
The seal body of novel annular space seal assembly device is deformed by sealing salient point and squeezes finger-type sealing in this patentRealize the sealing of metal to metal, seal body is equipped with the sealing effect for promoting finger-type sealing, upper salient point on the inside of seal bodyThere is the function of promoting to enhance sealing effect, lower salient point can protect the sealing surface in extrusion process.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodimentOr attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is onlyIt is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor propertyIt puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of novel annular space seal assembly apparatus structure schematic diagram.
Description of symbols
1. 5. outer lock rings top bar of step in 2. casing hanger of well head head, 3. lock ring, 4. well head head
6. 7. lock ring step surface of outer lock rings step surface, 8. lock ring outer surface, 9. outer lock rings lubrication groove profile surface
10. 11. male thread, 12. box thread 13. lock ring lubrication groove profile surface in contact point in the middle part of lock ring
14. 15. inner lock rings First terrace of lock ring leave from office terrace, 16. inner lock rings outer surface
17. seal point on 20. casing hanger outer profile 21. of salient point on 18. outer lock rings 19. of inner lock rings
The lower 24. small contact surface in casing hanger lower part of salient point of casing hanger sealing surface 23. on 22.
25. 26. first seal point of seal body lower part, 27. well head head top inner sealing surface
28. 29. top finger-type of elastomer seals the sealing of 30. lower part finger-type
31. 33. bottom protection structure of well head head lower part 32. second seal point of inner sealing surface
34. 35. casing hanger step surface 101. of inner lock rings second step face seals main body
The pipe hanger sealing surface 103. lower seal point 104. is trapped
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is further described.Implement belowExample is only used for clearly illustrating the technical solution of the utility model, and cannot be used as a limitation the protection model of limitation the utility modelIt encloses.
A kind of novel annular space seal assembly device, as shown in Figure 1, including well head head 1, casing hanger 2, lock ring 3, seal body25, inner lock rings 17, outer lock rings 18 and sealing main body 101, outer lock rings 18 are set to the outer upper side of inner lock rings 17, seal body 25It is cooperatively connected with sealing main body 101, the lower part of well head head 1 is equipped with well head head top inner sealing surface 27 and well head head lower part Nei MiCover 31, well head head top inner sealing surface 27 are additionally provided with well head on the surface of well head head lower part inner sealing surface 31, well head head 1There are certain gradient in step 4 in head, the outside of casing hanger 2, and upper casing hanger sealing surface 22 and setting of casing are arranged at the top of casing hanger 2Sealing surface 104 is hung, the small contact surface 24 in casing hanger lower part is arranged at the lower part of casing hanger 2, and the middle part of casing hanger 2 is equipped with casing hanger step surface35, seal body 25 is equipped with upper seal point 21 and lower seal point 103, and upper seal point 21 is in contact with upper casing hanger sealing surface 22It squeezes, lower seal point 103 is in contact extruding with pipe hanger sealing surface 104 of trapping, and the bottom of seal body 25 is close equipped with lower salient point 23Top finger-type sealing 29 and lower part finger-type sealing 30, top finger-type sealing 29 and lower part finger-type sealing 30 are arranged at the lower part of envelope ontology 25Between be additionally provided with elastomer 28, the top of top finger-type sealing 29 is the first seal point 26, and the top of lower part finger-type sealing 30 isSecond seal point 32 has oliquely downward inclined lock ring step surface 7, lock ring step surface 7 and 6 phase of outer lock rings step surface on lock ring 3The lower section of contact squeeze, lock ring step surface 7 is lock ring outer surface 8, and lock ring outer surface 8 is contacted with outer lock rings lubrication groove profile surface 9Locking, lock ring 3 are equipped with lock ring middle part contact point 10 and contact locking with sealing main body 101, and the lower part of lock ring 3 is successively arranged lockRing lubrication groove profile surface 13 and lock ring leave from office terrace 14, outer lock rings 18 are equipped with the cooperation of step 4 in outer lock rings top bar 5 and well head head and squeezePressure, inner lock rings 17 are equipped with inner lock rings First terrace 15, inner lock rings outer surface 16 and inner lock rings second step face 34, internal lockRing First terrace 15, inner lock rings outer surface 16 and inner lock rings second step face 34 are smooth contact surfaces.
25 top of seal body has additional salient point 19 and casing hanger outer profile 20 squeezes, and the presence of upper salient point 19 makes closeOne aduncate trend is arranged at envelope 25 lower part of ontology.19 quantity of upper salient point on 25 top of seal body is one.Seal body25 tightened with sealing main body 101 by male thread 11 and box thread 12 it is fixed in mating connection.Novel annular space seal assemblyThere are also bottom protection structures 33 for the bottom of device, for increasing sealing effect.Well head head 1, casing hanger 2, lock ring 3, inner lock rings 17,The material of outer lock rings 18, seal body 25 and sealing main body 101 selects corrosion-resisting alloy steel.
In the annular space of well head head 1 and casing hanger 2, construction personnel will push sealing main body 101 inside with running toolMovement is to be pressed into seal body 25 in this annular space, the inclining by 2 outside of casing hanger during seal body 25 is pressed intoGradient promotes seal body 25 to be squeezed and deformed.So that the upper seal point 21 of seal body 25 and upper casing hanger sealing surface 22 and underSeal point 103 and pipe hanger sealing surface 104 of trapping, which are squeezed and deformed, realizes metal sealing.During pushing, the lower salient point of setting23 slightly above lower sealing salient points 103 make lower sealing salient point 103 in place before do not contact sealing surface, when being depressed into salient point under position23, which can be squeezed into the small contact surface 24 in casing hanger lower part, contacts, this seals salient point 103 at present and can squeeze with casing hanger sealing surface 104And realize sealing.The well head head top of first seal point 26 and well head head 1 of the top finger-type sealing 29 of seal body 25 simultaneouslyInner sealing surface 27 and the second seal point 32 of lower part finger-type sealing 30 contact with well head head lower part inner sealing surface 31 and squeeze changeShape realizes sealing.Elastomer 28 can be pressed further by top finger-type under extruding force effect and seal 29 Hes in extrusion process simultaneouslyLower part finger-type sealing 30, promotes under the first seal point 26 and the second seal point 32 and well head head top inner sealing surface 27 and well head headThe sealing of portion's inner sealing surface 31 enhances.A upper salient point 19 is increased on 25 top of seal body to squeeze with casing hanger outer profile 20So that an aduncate trend is arranged at 25 lower part of seal body, each seal point sealing effect is promoted to further enhance.
Then under the lock ring 3 on seal assembly being locked using running tool, lock ring step surface during lock ring 3 under lock7 squeeze outer lock rings step surface 6, promote outer lock rings 18 to be pressed into the lock ring slot of well head head 1, and lock ring outer surface 8 and outer lock ringsLubrication groove profile surface 9 is contacted and is locked.The inner lock rings First that the lower part of lock ring 3 has lock ring leave from office terrace 14 to squeeze inner lock rings 17 simultaneouslyTerrace 15 promotes inner lock rings 17 and casing hanger 2 to lock.
Continue to press downward to lock ring 3, lock ring lubrication groove profile surface 13 can contact simultaneously with the inner lock rings outer surface 16 of inner lock rings 17Locking.We pass through the casing hanger of the extruding of step 4 and casing hanger 2 in outer lock rings top bar 5 and well head head during lockingStep surface 35 and inner lock rings second step face 34 squeeze to realize one preload force of offer after seal assembly locking, to make to sealBetter effect.Also being machined with bottom protection structure 33 in the bottom of seal assembly is to prevent silt from seeping from seal assembly external seal faceEnter to play the role of to protect seal assembly.The seal body 25 and sealing main body 101 of seal assembly pass through male thread 11 and motherScrew thread 12 is cooperatively connected.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at thisWithin the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility modelProtection scope within.