CN205858247U - Dry method well cementation well head annular space sealing device - Google Patents

Dry method well cementation well head annular space sealing device Download PDF

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Publication number
CN205858247U
CN205858247U CN201620645115.0U CN201620645115U CN205858247U CN 205858247 U CN205858247 U CN 205858247U CN 201620645115 U CN201620645115 U CN 201620645115U CN 205858247 U CN205858247 U CN 205858247U
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CN
China
Prior art keywords
toroidal frame
sealing ring
sealing device
dry method
sleeve pipe
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Application number
CN201620645115.0U
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Chinese (zh)
Inventor
黄明
文永林
代锋
肖庆富
李勇
皮国庆
吴熙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sinopec Oilfield Service Corp
Drilling Engineering Research Institute of Sinopec Southwest Petroleum Engineering Co Ltd
Original Assignee
Sinopec Oilfield Service Corp
Drilling Engineering Research Institute of Sinopec Southwest Petroleum Engineering Co Ltd
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Priority to CN201620645115.0U priority Critical patent/CN205858247U/en
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Abstract

The open a kind of dry method well cementation well head annular space sealing device of this utility model, described sealing device is fixed on the housing of rotating blowout preventer in the sleeve pipe decentralization process that dry method is cemented the well, for blocking the annular clearance between sleeve pipe and rotating blowout preventer housing, described sealing device includes toroidal frame and can the flexible sealing ring of inflation, the internal diameter of described toroidal frame is more than sleeve outer, external diameter is more than the internal diameter of rotating blowout preventer housing, described sealing ring is hollow structure, there is valve, sealing ring is arranged in toroidal frame, by the banding of inflation/lose heart corresponding/unclamp sleeve pipe.It matches with rotating blowout preventer housing, it is fixed on rotating blowout preventer housing by toroidal frame, realizes the banding to sleeve pipe by the sealing ring of inflation or unclamp, and then on the premise of effectively guaranteeing that sleeve pipe is reliably transferred in pit shaft, can effectively, reliably, stably realize the wellhead sealing of pit shaft, set up pressures cycle reliably in making pit shaft, provide great convenience for exploitation construction.

Description

Dry method well cementation well head annular space sealing device
Technical field
This utility model relates to Oil/gas Well drilling-production equipment, specifically a kind of dry method well cementation well head annular space sealing device.
Background technology
Owing to dry method well cementation directly transfers sleeve pipe and cementing without replacing in well into drilling fluid, thus it has Efficient quick (i.e. having saved the gas-liquid conversion time, simultaneously shorten drilling period), drilling low cost (i.e. decrease drilling fluid Consumption), the feature such as easy to operate, in industry receive extensively favor.
Can transfer in order to ensure dry method well cementing operation middle sleeve smoothly and transfer and put in place, need to use air or bubble Foam is circulated.But, on the basis of this circulation is built upon pit shaft sealing.
At present, in dry method well cementing operation, the wellhead sealing of pit shaft is realized by rotating blowout preventer housing, i.e. revolve Turn preventer housing to be installed between the borehole wall of pit shaft mouth and the sleeve pipe of lower going-into-well cylinder, with the borehole wall of this seal shaft and sleeve pipe it Between mineshaft annulus gap.But, transfer must be requested that the endoporus of rotating blowout preventer housing in order to realize sleeve pipe in pit shaft And formation freely installs combination, i.e. rotating blowout preventer housing and just can ensure that sleeve pipe it has to be ensured that sleeve pipe passes freely through between sleeve pipe Transferring action in pit shaft, this allows for defining between sleeve outer wall and rotating blowout preventer housing pressure relief openings, thus shadow Ring the sealing of pit shaft, the most just have impact on pressures cycle in pit shaft and set up, and then make sleeve pipe decentralization process easily occurs Stuck or transfer phenomenon not in place, cause the exploitation of Oil/gas Well to have bigger potential safety hazard.
Summary of the invention
The purpose of this utility model is: the particularity cemented the well for above-mentioned dry method, and the deficiencies in the prior art, it is provided that A kind of coordinate rotating blowout preventer housing to be formed at the annular space of Oil/gas Well well head reliably, the dry method well cementation well head ring of stabilized seal Empty sealing device.
The technical solution adopted in the utility model is: a kind of dry method well cementation well head annular space sealing device, and described sealing fills Put and be fixed on the housing of rotating blowout preventer, for blocking sleeve pipe and rotating blowout preventer in the sleeve pipe decentralization process of dry method well cementation Annular clearance between housing, described sealing device include toroidal frame and can the flexible sealing ring of inflation, described annular The internal diameter of frame is more than the internal diameter of rotating blowout preventer housing more than the external diameter of sleeve outer, toroidal frame, and described sealing ring is hollow knot Structure, having valve, sealing ring is arranged in toroidal frame, by the banding of inflation/lose heart corresponding/unclamp sleeve pipe.
Further, the inwall of described toroidal frame is provided with the annular groove corresponding to sealing ring, and sealing ring is inlaid in annular In the annular groove of frame.
Further, in the annular groove of described toroidal frame, be radially provided with corresponding on sealing ring valve add pore With multiple fixture mounting holes.
Further, the outer wall of described sealing ring is provided with multiple fixing corresponding to toroidal frame upper fixing element mounting hole Groove.
Further, the inner side wall thickness of described sealing ring is more than outside wall thickness.
Further, the bottom of described toroidal frame has the annular shoulder that outer folding extends, and the appearance profile of toroidal frame is in T Shape.
Further, the annular shoulder bottom surface of described toroidal frame is the assembling conical surface, this assembling conical surface and the end of toroidal frame Angle between end radially extending surface is 5~60 °.
The beneficial effects of the utility model are: above-mentioned sealing device matches with rotating blowout preventer housing, passes through toroidal frame It is fixed on rotating blowout preventer housing, realizes the banding to sleeve pipe by the sealing ring of inflation or unclamp, and then effectively On the premise of guaranteeing that sleeve pipe is reliably transferred in pit shaft, it is possible to effectively, reliably, stably realize the wellhead sealing of pit shaft, make well Set up pressures cycle in Tong reliably, provide great convenience for exploitation construction.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings this utility model is further described.
Fig. 1 is a kind of structural representation of the present utility model.
Fig. 2 is the top perspective view of sealing ring in Fig. 1.
Code name implication in figure: 1 toroidal frame;2 sealing rings;3 fixture mounting holes;4 annular shoulders;5 assemblings The conical surface;6 casing tube wearing holes;7 valves;8 fixed grooves.
Detailed description of the invention
This utility model blocks the well head annular clearance of pit shaft in the dry method of oil gas well mining in cementing the well, anti-with rotating Spray apparatus housing matches, and i.e. in the sleeve pipe decentralization process of dry method well cementation, this utility model is fixed on the housing of rotating blowout preventer Top, for blocking the annular clearance between sleeve pipe and rotating blowout preventer housing, with this, well head annular clearance of pit shaft is formed Reliably seal.
See Fig. 1 and Fig. 2: this utility model and include toroidal frame 1 and flexible (usually quality of rubber materials) sealing ring 2.
Wherein, toroidal frame 1 is loop configuration, has axial casing tube wearing hole 6, the diameter in this casing tube wearing hole 6 (that is The internal diameter of toroidal frame 1) require have to be larger than the external diameter of sleeve pipe, the most just can ensure that operation process middle sleeve can reliably be transferred. Can be formed in rotating blowout preventer case top in order to ensure toroidal frame 1 and combine installation reliably, outside the bottom of toroidal frame 1 has The annular shoulder 4 that folding extends, the appearance profile of toroidal frame 1 is upside down t-shape, the diameter of this annular shoulder 4 (that is toroidal frame 1 External diameter) require have to be larger than the internal diameter of rotating blowout preventer housing, the most just can ensure that toroidal frame 1 is in rotating blowout preventer case top Reliable installation is fixed.The annular shoulder 4 of toroidal frame 1 is arranged on the top of rotating blowout preventer housing by many connecting bolt combinations Portion, the i.e. bottom surface of annular shoulder 4 define the toroidal frame 1 fitting surface on rotating blowout preventer housing, in order to ensure this fitting surface Formed with the casing tube wearing hole on rotating blowout preventer housing and reliably seal, it is desirable to annular shoulder 4 bottom surface of aforementioned toroidal frame 1 is cone Face structure, i.e. the assembling conical surface 5, the existence of this assembling conical surface 5 mainly guarantees bottom surface and the rotating blowout preventer housing of toroidal frame 1 Casing tube wearing hole forms reliable linear contact lay, as long as thus usual its of the assembling conical surface 5 of annular shoulder 4 bottom surface forms the inclination conical surface , as preferably, it is desirable to assembling the conical surface 5 and the bottom radially extending surface of toroidal frame 1 between angle be 5~60 ° (such as 13 °, or 28 °, or 45 °, also or 60 ° etc.).Inwall at aforementioned toroidal frame 1 is circumferentially with the annular of corresponding sealing ring 2 profile Groove, is used for assembling sealing ring 2;Reliably fix in order to sealing ring 2 is formed, avoid existing at sleeve pipe effect lower sealing ring 2 Wantonly slide in toroidal frame 1, in the annular groove of toroidal frame 1, be radially provided with multiple fixture mounting hole 3(and be usually screw thread Hole), these fixture mounting holes 3 are formed symmetrical two-by-two on toroidal frame 1, to guarantee the fixing balance of sealing ring 2;This Outward, in the groove of toroidal frame 1, it is radially provided with one and adds pore, for the valve 7 of sealing ring 2 is connected with air pump.
Sealing ring 2 seals structure (being similar to inner tube of vehicles) for ring-type, inner hollow, and lateral wall has valve 7, logical Crossing valve 7 after sealing ring 2 fills/loses heart, sealing ring 2 occurs to expand accordingly or collapsing;And set on the lateral wall of sealing ring 2 There is multiple fixed groove 8 corresponding to toroidal frame 1 upper fixing element mounting hole 3.Sealing ring 2 is inlaid in the annular of above-mentioned toroidal frame 1 In groove, valve 7 correspondence on sealing ring 2 adds at pore on toroidal frame 1, and fixed groove 8 correspondence on sealing ring 2 is at ring At fixture mounting hole 3 on shape frame 1, when sealing ring 2 expands, the fixture that is installed in fixture mounting hole 3 radially holds out against Sealing ring 2.The sealing ring 2 being assembled in toroidal frame 1 produces dilatancy after inflation, and then internal diameter reduces, banding is installed on Interior sleeve outer wall, forms sealing to the well head of pit shaft, and when displacement operations such as needs sleeve rotatings, sealing ring 2 is after losing heart Generation collapsing deforms, so internal diameter relax expansions, unclamp and be installed on interior sleeve outer wall, it is ensured that be installed on interior sleeve pipe " oneself By ".Because the work characteristics of sealing ring 2, in order to improve the wearability of sealing ring 2, increase the service life, aforementioned seal ring 2 Inner side wall thickness more than outside wall thickness, usually 1.5~3 times.
Above-mentioned concrete technical scheme, only in order to this utility model to be described, is not intended to limit.Although with reference to above-mentioned concrete skill This utility model has been described in detail by art scheme, it will be understood by those within the art that: it still can be right Above-mentioned concrete technical scheme is modified, or wherein portion of techniques feature is carried out equivalent;And these are revised or replace Change, do not make the essence of appropriate technical solution depart from the spirit and scope of technical solutions of the utility model.

Claims (7)

1. a dry method well cementation well head annular space sealing device, described sealing device is solid in the sleeve pipe decentralization process that dry method is cemented the well It is scheduled on the housing of rotating blowout preventer, for blocking the annular clearance between sleeve pipe and rotating blowout preventer housing, it is characterised in that: Described sealing device include toroidal frame (1) and can the flexible sealing ring (2) of inflation, the internal diameter of described toroidal frame (1) is big External diameter in sleeve outer, toroidal frame (1) is more than the internal diameter of rotating blowout preventer housing, and described sealing ring (2) is hollow structure, tool In having valve (7), sealing ring (2) to be arranged in toroidal frame (1), by the banding of inflation/lose heart corresponding/unclamp sleeve pipe.
Dry method well cementation well head annular space sealing device the most according to claim 1, it is characterised in that: described toroidal frame (1) Inwall is provided with the annular groove corresponding to sealing ring (2), and sealing ring (2) is inlaid in the annular groove of toroidal frame (1).
Dry method well cementation well head annular space sealing device the most according to claim 2, it is characterised in that: described toroidal frame (1) In annular groove, it is radially provided with and adds pore and multiple fixture mounting hole (3) corresponding to the upper valve of sealing ring (2).
Dry method well cementation well head annular space sealing device the most according to claim 3, it is characterised in that: described sealing ring (2) Outer wall is provided with multiple fixed groove (8) corresponding to toroidal frame (1) upper fixing element mounting hole (3).
5. according to the well head annular space sealing device of dry method well cementation described in any one of Claims 1-4, it is characterised in that: described close The inner side wall thickness of seal ring (2) is more than outside wall thickness.
6. according to the well head annular space sealing device of dry method well cementation described in any one of Claims 1-4, it is characterised in that: described ring The bottom of shape frame (1) has the annular shoulder (4) that outer folding extends, and the appearance profile of toroidal frame (1) is upside down t-shape.
Dry method well cementation well head annular space sealing device the most according to claim 6, it is characterised in that: described toroidal frame (1) Annular shoulder (4) bottom surface is the assembling conical surface (5), the folder between this assembling conical surface (5) and bottom radially extending surface of toroidal frame (1) Angle is 5~60 °.
CN201620645115.0U 2016-06-27 2016-06-27 Dry method well cementation well head annular space sealing device Active CN205858247U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620645115.0U CN205858247U (en) 2016-06-27 2016-06-27 Dry method well cementation well head annular space sealing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620645115.0U CN205858247U (en) 2016-06-27 2016-06-27 Dry method well cementation well head annular space sealing device

Publications (1)

Publication Number Publication Date
CN205858247U true CN205858247U (en) 2017-01-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201620645115.0U Active CN205858247U (en) 2016-06-27 2016-06-27 Dry method well cementation well head annular space sealing device

Country Status (1)

Country Link
CN (1) CN205858247U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106968631A (en) * 2017-04-24 2017-07-21 赵吉春 A kind of long-acting anti-oil leakage device of well mouth of oil well
CN110053894A (en) * 2019-04-23 2019-07-26 大庆宏昌艾达科技有限公司 Greasy dirt collects antiseep environmental protecting device when a kind of oil recovery and well workover
CN110740935A (en) * 2017-04-18 2020-01-31 Itt制边企业有限责任公司 Aircraft auxiliary power unit exhaust duct seal and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110740935A (en) * 2017-04-18 2020-01-31 Itt制边企业有限责任公司 Aircraft auxiliary power unit exhaust duct seal and method
CN106968631A (en) * 2017-04-24 2017-07-21 赵吉春 A kind of long-acting anti-oil leakage device of well mouth of oil well
CN110053894A (en) * 2019-04-23 2019-07-26 大庆宏昌艾达科技有限公司 Greasy dirt collects antiseep environmental protecting device when a kind of oil recovery and well workover
CN110053894B (en) * 2019-04-23 2020-06-05 大庆宏昌艾达科技有限公司 Oil stain collection anti-leakage environment-friendly device during oil extraction and well workover

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