CN203742523U - Underwater annular blowout preventer - Google Patents
Underwater annular blowout preventer Download PDFInfo
- Publication number
- CN203742523U CN203742523U CN201420086333.6U CN201420086333U CN203742523U CN 203742523 U CN203742523 U CN 203742523U CN 201420086333 U CN201420086333 U CN 201420086333U CN 203742523 U CN203742523 U CN 203742523U
- Authority
- CN
- China
- Prior art keywords
- housing
- piston
- blind hole
- cam ring
- top cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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Abstract
The utility model relates to an underwater annular blowout preventer which comprises a top cover and a shell. An annular groove is formed in the inner side of the upper portion of the shell. A plurality of locking jaw discs are clamped inside the annular groove. Each locking jaw disc locks or unlocks the top cover through a locking bolt assembly. A plurality of blind holes used as hydraulic cylinders are formed in the outer side of the bottom of the shell in the circumferential direction. The opening end of each blind hole is connected with a piston cover in a fastened mode. An oil through hole is formed in the center of each piston cover. Another oil through hole is formed in the position, at the closed end of each blind hole, of the shell in the radial direction. A piston is arranged inside each blind hole. Each piston is connected with the lower end of a connecting rod in a fastened mode. The upper end of each connecting rod penetrates through the position, at the closed end of each blind hole, of the shell and then is connected with a cam ring in a fastened mode. The external shape of the cam ring is matched with that of a stepped cavity of the shell. A plurality of balanced holes are formed in the radial direction of the cam ring. The position, at the upper portion of the cam ring, of the shell is internally provided with a rubber core. The second step cavity of the shell is internally and fixedly connected with a supporting cylinder. An opening cavity is formed between each piston and the closed end of the corresponding blind hole. A closed cavity is formed between each piston and the corresponding piston cover.
Description
Technical field
The utility model relates to a kind of drilling well control device, the annular preventer under water of the use of shunting in a well while particularly exploitation about a kind of marine oil gas field.
Background technology
When preventer is exploration and development marine oil gas field, prevent the crucial drilling well control device of blowout, balanced drilling pressure under water, it has protection offshore boring island personnel, device security and avoids the effect of marine environmental pollution, requires to have high reliability.In marine oil gas field exploration and development drilling process, blowout preventer set is arranged on casing head of well head under water, is generally made up of 1～2 annular preventer and 4～6 ram preventers.Wherein annular preventer can seal formed by the drilling rod of various shape and size, tool joint, drill collar, sleeve pipe, cable etc. and glue core annular space.When in well during without drilling tool, can totally-enclosed well head; In the time using buffering energy-storing device, can carefully detain butt joint by 18 °/35 ° nothings and carry out stripping-in operations.Existing annular preventer under water normally promotes glue core by piston and carries out sealing wellhead or tubing string, and the housing seal face of piston and cooperation is with it easily because wearing and tearing cause seal failure, therefore sealing wellhead and tubing string long-term effectively.In sum, the existing sealing reliability of annular preventer is under water lower, and there is no sealed external hydraulic pressure, inner body seriously corroded.
Summary of the invention
For the problems referred to above, the purpose of this utility model is to provide a kind of reliable, long service life and strong annular preventer under water of applicability of sealing.
For achieving the above object, the utility model is taked following technical scheme: one is annular preventer under water, it is characterized in that: it comprises that a top offers the top cover of a through hole, described top cover is fastenedly connected a housing, an annular groove is offered in the inner side on described housing top, in described groove, clamp some locking jaw dishes for fastening described top cover, described in each, locking jaw dish all radially runs through top cover described in the lock bolt assembly locking of described housing or release by one; The bottom outside of described housing is along circumferentially offering some blind holes of using as hydraulic cylinder, described in each, the opening end of blind hole is all fastenedly connected a piston cap, described in each, an oil through is all offered at the center of piston cap, all radially offers another oil through described in each on the described housing of blind hole blind end; Described in each, in blind hole, all slide a piston is set, be all fastenedly connected the lower end of a connecting rod described in each on piston, described in each, the upper end of connecting rod is all fastenedly connected a cam ring after running through the described housing of described blind hole blind end; The external shape of described cam ring matches with the stepped cavity of described housing, the balance pipe of radially offering some enclosed cavity internal pressures that form for balance and the described cam ring motion process of release of described cam ring; In the described housing on described cam ring top, place a glue core moving up and down with described cam ring, in the second stepped cavity of described housing, be fastenedly connected one for supporting the support tube of described glue core; Between described piston and blind hole blind end, form a unlatching chamber, between described piston and piston cap, form and close chamber.
Described top cover is that cross sectional shape is inverted U-shaped circulus, and its inside top is offered a groove, in described groove, connects a wearing plate by some screw fastenings, and described top upper part of the cover outward flange arranges a flange; Described top cover connects described housing by the some screw fastenings that are arranged on described flange.
Described lock bolt assembly comprises the pawl valve snail nail of a hollow, suit one supporting screw in described pawl valve snail nail, one end of described supporting screw screws in described locking jaw dish, the head of described pawl valve snail nail is fastenedly connected a plug for sealed external hydraulic pressure, and what described pawl valve snail nail contacted with housing circumferentially arranges one for sealed external water-pressure sealed circle.
Between the flange of described top cover and the upper surface of housing, the bottom of described top cover and the contact surface of housing, described piston and blind hole inwall, between described connecting rod and piston and between described connecting rod and housing, another sealing ring is all set; Between described piston and blind hole inwall, between described connecting rod and housing and between described cam ring and the inwall of housing, a wear-resistant strip is all set.
The number of described blind hole is 8～16.
The utility model is owing to taking above technical scheme, it has the following advantages: 1, jointly promote glue core motion sealing wellhead because the utility model adopts multiple pistons, even if indivedual plunger shaft break down, can not affect sealing performance of the present utility model, therefore greatly improve sealing reliability of the present utility model yet.2, due between housing end face of the present utility model and top cover flange, be provided with sealing ring between the lock-screw of locking jaw dish and housing, and the outer face of lock-screw is provided with plug, therefore can effectively prevent that seawater from entering annular preventer inside, thereby avoid the component of seawater corrosion annular preventer inside, greatly extended the application life of annular preventer.3, due to the balance pipe that radially offers connection enclosed cavity of the utility model cam ring, when piston movement, discharge the pressure in enclosed cavity by balance pipe, thereby reduce piston movement resistance.The edge of all moving components that 4, relate to due to the utility model is all provided with wear-resistant strip, therefore reduced moving component and the parts that coordinate with it between wearing and tearing, thereby greatly extended application life of moving component.5, due to plunger shaft Redundancy Design of the present utility model, therefore, even if 1～6 plunger shaft fault does not affect annular preventer sealing wellhead yet.6, because the inner side of the utility model top cover is provided with wearing plate, after wearing plate wearing and tearing, easily change, therefore, avoid the wearing and tearing to top cover, extend application life of the present utility model.
Brief description of the drawings
Fig. 1 be the utility model overall structure front view partly cut open schematic diagram
Fig. 2 is the local enlarged diagram of the I of Fig. 1
Fig. 3 is the local enlarged diagram of the II of Fig. 1
Fig. 4 be the utility model use front view when state partly cut open schematic diagram
Fig. 5 is the integrally-built elevational schematic view of the utility model
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in detail.
As shown in Figure 1 and Figure 2, the utility model comprises a top cover 1, top cover 1 is that cross sectional shape is inverted U-shaped circulus, its top center is offered a through hole 1-0, inside top is offered a groove 1-1, in groove 1-1, connect a wearing plate 2 by some screw fastenings, the outward flange on top cover 1 top arranges a flange 1-2.Top cover 1 connects a housing 3 by the some screw fastenings that are arranged on flange 1-2, has a stepped cavity in housing 3.The upper inner of housing 3 is offered an annular groove 3-0, equidistantly clamps some locking jaw dishes 4 for fastening top cover 1 in groove 3-0, and each locking jaw dish 4 is all locked or release top cover 1 by a lock bolt assembly 5 that radially runs through housing 3.The bottom outside of housing 3 is along circumferentially equidistantly offering some blind hole 3-2 as hydraulic cylinder, the opening end of each blind hole 3-2 all connects a piston cap 6 by some screw fastenings, an oil through 7 is offered at the center of piston cap 6, all radially offers an oil through 8 being communicated with outside on the housing 3 of each blind hole 3-2 blind end.In each blind hole 3-2, all slide a piston 9 is set, each piston 9 is all by a nut 10 and a vertical lower end that is fastenedly connected a connecting rod 12 of pad 11, the upper end of each connecting rod 12 is fastenedly connected a cam ring 13 after running through the housing 3 of blind hole 3-2 blind end, and the external shape of cam ring 13 matches with the stepped cavity of housing 3, cam ring 13 drives it in the stepped cavity of housing 3, to move up and down by connecting rod 12, and it radially offers the balance pipe 13-0 of two enclosed cavity 14 internal pressures that form for balance and release cam ring 13 motion processes.The interior placement one glue core 16 of housing 3 on cam ring 13 tops, connects one for supporting the support tube 15 of glue core 16 by some screw fastenings in the second stepped cavity 3-4 of housing 3, and glue core 16 is realized sealing and opened well head or tubing string with moving up and down of cam ring 13.
In the above-described embodiments, as shown in Figure 3, lock bolt assembly 5 comprises the pawl valve snail nail 50 of a hollow, pawl valve snail is followed closely 50 interior suit one supporting screws 51, one end of supporting screw 51 screws in locking jaw dish 4, the head of pawl valve snail nail 50 is fastenedly connected a plug 52, and what pawl valve snail nail 50 contacted with housing 3 circumferentially arranges a sealing ring 53, and plug 52 and sealing ring 53 are for sealed external hydraulic pressure.When use, by clockwise or be rotated counterclockwise supporting screw 51 and drive locking jaw dish 4 to move radially, thereby realize locking or release top cover 1 and housing 3.
As Figure 1 and Figure 4, piston 9 forms one with blind hole 3-2 blind end and opens chamber 17, between piston 9 and piston cap 6, forms and closes chamber 18.
In the above-described embodiments, as shown in Figure 1 and Figure 2, between the flange 1-2 of top cover 1 and housing 3 upper surfaces, the bottom of top cover 1 and the contact surface of housing 3, piston 9 and blind hole 3-2 inwall, between connecting rod 12 and piston 9 and between connecting rod 12 and housing 3, another sealing ring 19 is all set.Between piston 9 and blind hole 3-2 inwall, between connecting rod 12 and housing 3 and between cam ring 13 and the inwall of housing 3, a wear-resistant strip 20 is all set.
In the above-described embodiments, the number of blind hole 3-2 is 8～16.
Describe using method of the present utility model below in detail:
As shown in Figure 1, Figure 4 and Figure 5, in the time using the utility model sealing wellhead or tubing string, all oil throughs 7 are communicated with to control system (not shown) by the joint 210 of a connecting line 21, under the effect of fluid control pressure, piston 9 drives cam ring 13 to move up vertically by connecting rod 12, cam ring 13 promotes glue core 16 and moves to the center of housing 3 along wearing plate 2, with sealing wellhead or tubing string.In the time using the utility model to open well head or tubing string, all another oil throughs 8 are communicated with to control system by the joint 220 of another connecting line 22, under the effect of fluid control pressure, piston 9 drives cam ring 13 to move down vertically by connecting rod 12, cam ring 13 resets, glue core 16 relies on self elasticity, restores to the original state, to open well head or tubing string.
In the above-described embodiments, connecting line 21 and another connecting line 22 adopt flexible pipe or hard tube all can.
The various embodiments described above are only for illustrating the utility model; wherein the structure of each parts, connected mode and manufacture craft etc. all can change to some extent; every equivalents of carrying out on the basis of technical solutions of the utility model and improvement, all should not get rid of outside protection domain of the present utility model.
Claims (7)
1. an annular preventer under water, it is characterized in that: it comprises that a top offers the top cover of a through hole, described top cover is fastenedly connected a housing, an annular groove is offered in the inner side on described housing top, in described groove, clamp some locking jaw dishes for fastening described top cover, described in each, locking jaw dish all radially runs through top cover described in the lock bolt assembly locking of described housing or release by one; The bottom outside of described housing is along circumferentially offering some blind holes of using as hydraulic cylinder, described in each, the opening end of blind hole is all fastenedly connected a piston cap, described in each, an oil through is all offered at the center of piston cap, all radially offers another oil through described in each on the described housing of blind hole blind end; Described in each, in blind hole, all slide a piston is set, be all fastenedly connected the lower end of a connecting rod described in each on piston, described in each, the upper end of connecting rod is all fastenedly connected a cam ring after running through the described housing of described blind hole blind end; The external shape of described cam ring matches with the stepped cavity of described housing, the balance pipe of radially offering some enclosed cavity internal pressures that form for balance and the described cam ring motion process of release of described cam ring; In the described housing on described cam ring top, place a glue core moving up and down with described cam ring, in the second stepped cavity of described housing, be fastenedly connected one for supporting the support tube of described glue core; Between described piston and blind hole blind end, form a unlatching chamber, between described piston and piston cap, form and close chamber.
2. annular preventer under water as claimed in claim 1, it is characterized in that: described top cover is that cross sectional shape is inverted U-shaped circulus, its inside top is offered a groove, in described groove, connects a wearing plate by some screw fastenings, and described top upper part of the cover outward flange arranges a flange; Described top cover connects described housing by the some screw fastenings that are arranged on described flange.
3. annular preventer under water as claimed in claim 1, it is characterized in that: described lock bolt assembly comprises the pawl valve snail nail of a hollow, suit one supporting screw in described pawl valve snail nail, one end of described supporting screw screws in described locking jaw dish, the head of described pawl valve snail nail is fastenedly connected a plug for sealed external hydraulic pressure, and what described pawl valve snail nail contacted with housing circumferentially arranges one for sealed external water-pressure sealed circle.
4. annular preventer under water as claimed in claim 2, it is characterized in that: described lock bolt assembly comprises the pawl valve snail nail of a hollow, suit one supporting screw in described pawl valve snail nail, one end of described supporting screw screws in described locking jaw dish, the head of described pawl valve snail nail is fastenedly connected a plug for sealed external hydraulic pressure, and what described pawl valve snail nail contacted with housing circumferentially arranges one for sealed external water-pressure sealed circle.
5. annular preventer under water as claimed in claim 1 or 2 or 3 or 4, is characterized in that: between the flange of described top cover and the upper surface of housing, the bottom of described top cover and the contact surface of housing, described piston and blind hole inwall, between described connecting rod and piston and between described connecting rod and housing, another sealing ring is all set; Between described piston and blind hole inwall, between described connecting rod and housing and between described cam ring and the inwall of housing, a wear-resistant strip is all set.
6. annular preventer under water as claimed in claim 1 or 2 or 3 or 4, is characterized in that: the number of described blind hole is 8～16.
7. annular preventer under water as claimed in claim 5, is characterized in that: the number of described blind hole is 8～16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420086333.6U CN203742523U (en) | 2014-02-27 | 2014-02-27 | Underwater annular blowout preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420086333.6U CN203742523U (en) | 2014-02-27 | 2014-02-27 | Underwater annular blowout preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203742523U true CN203742523U (en) | 2014-07-30 |
Family
ID=51342340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420086333.6U Withdrawn - After Issue CN203742523U (en) | 2014-02-27 | 2014-02-27 | Underwater annular blowout preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203742523U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103850662A (en) * | 2014-02-27 | 2014-06-11 | 中国海洋石油总公司 | Underwater annular preventer |
-
2014
- 2014-02-27 CN CN201420086333.6U patent/CN203742523U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103850662A (en) * | 2014-02-27 | 2014-06-11 | 中国海洋石油总公司 | Underwater annular preventer |
| CN103850662B (en) * | 2014-02-27 | 2016-04-27 | 中国海洋石油总公司 | One is annular preventer under water |
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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: 20140730 Effective date of abandoning: 20160427 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |