Patent US4537011A successfully refreshed from Google Patents.
Patent US3647174A successfully refreshed from Google Patents.
US3647174A
Expired / Lapsed
US
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Blowout preventer
Assignee: Hydril LLC
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Filing: 1970-09-25
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Granted: 1972-03-07
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Expires: 1990-09-25
Abstract
Abstract Blowout preventers of the ram-type, each having a bonnet which is detachably connected to the preventer body, and which bonnet is movable away from the preventer body to expose the ram therewith for permitting removal of the ram from the preventer for replacement or repair, wherein the ram piston and cylinder which are operable for moving the ram to and from its open and closed positions when the bonnet is secured to the preventer body are also operable for moving the bonnet away from and towards the preventer body when the bonnet is disconnected from the body. Detent means are provided for resisting relative movement between the ram and the body when the ram is in the open position and the bonnet is disconnected from the body, whereby the bonnet can be moved away from the body to the exposed ram position and then returned to reengage the bonnet with the body. Flexible hydraulic fluid conductor means is provided for operating the piston and for moving the cylinder relative to the piston.
Inventors
- 👤 Robert K Lerouax
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:31
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/06; E21B33/061; E21B33/062
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
232 words
A blowout preventer, comprising: a blowout preventer body having a central bore therethrough through which well pipe may pass, and a ram opening through the wall of said body on at least one side of said central opening and communicating with said central opening; a ram for said ram opening; a bonnet detachably connected to said body over said ram opening and adapted to receive said ram when it has been moved to an open position out of said central opening; an operating cylinder connected to said bonnet and movable therewith; a piston operably disposed in said cylinder and having a rod connected therefrom through said bonnet to said ram; fluid pressure means for supplying fluid under pressure to either side of each piston for controlling its movements to thereby control the movements of said ram to and from a closed position wherein said ram extends into said central opening in said preventer body and an open position wherein said central opening is unobstructed and said ram is disposed outwardly of said ram opening of said body; and resistance means for resisting relative movement between said ram and said body when said bonnet therewith is disconnected from said preventer body whereby said bonnet can be moved away from said body by introducing fluid pressure into said operating cylinder outwardly of said piston to thereby expose said ram for removal from the preventer.
Claim 2
Dependent Claim
232 words
A blowout preventer, comprising: a blowout preventer body having a central bore therethrough through which well pipe may pass, and a ram opening through the wall of said body on at least one side of said central opening and communicating with said central opening; a ram for said ram opening; a bonnet detachably connected to said body over said ram opening and adapted to receive said ram when it has been moved to an open position out of said central opening; an operating cylinder connected to said bonnet and movable therewith; a piston operably disposed in said cylinder and having a rod connected therefrom through said bonnet to said ram; fluid pressure means for supplying fluid under pressure to either side of each piston for controlling its movements to thereby control the movements of said ram to and from a closed position wherein said ram extends into said central opening in said preventer body and an open position wherein said central opening is unobstructed and said ram is disposed outwardly of said ram opening of said body; and resistance means for resisting relative movement between said ram and said body when said bonnet therewith is disconnected from said preventer body whereby said bonnet can be moved away from said body by introducing fluid pressure into said operating cylinder outwardly of said piston to thereby expose said ram for removal from the preventer.
Claim 3
Dependent Claim
52 words
The structure set forth in claim 1, wherein: said resistance means also resists relative movement between said ram and said body when fluid pressure is introduced into said operating cylinder inwardly of said piston to return said bonnet from the open ram-exposed position to the closed position in contact with said body.
Claim 4
Dependent Claim
94 words
The structure set forth in claim 1, wherein said resiStance means includes: coacting detent means on said rod and said body which are releasably engageable when said ram is in said open position; said detent means providing sufficient resistance in the engaged position to prevent movement of said rod and said ram therewith relative to said body during outward movement of said bonnet relative to said body; and said detent means being releasable upon the application of fluid pressure outwardly of said piston in said cylinder when said bonnet is secured to said body.
Claim 5
Dependent Claim
36 words
The structure set forth in claim 3, wherein said detent means includes: a resiliently movable member on one of said body and said rod; and a detent on the other of said body and said rod.
Claim 6
Dependent Claim
44 words
The structure set forth in claim 3, wherein: said body has an extension projecting into said bonnet and having a portion of said detent means therewith disposed outwardly of said ram for engagement with the other part of said detent means on said rod.
Claim 7
Dependent Claim
27 words
The structure set forth in claim 5, wherein: said extension of said body is disposed for supporting said ram when said ram is in said open position.
Claim 8
Dependent Claim
30 words
The structure set forth in claim 1, including: stop means for preventing movement of said ram relative to said body during inward movement of said bonnet relative to said body.
Claim 9
Dependent Claim
33 words
The structure set forth in claim 7, wherein said stop means includes: coacting stop surfaces on said piston rod and said body which are engageable when said ram is in said open position.
Claim 10
Dependent Claim
55 words
The structure set forth in claim 1, wherein said fluid pressure means includes: two fluid conduits in said body and extending to said cylinder, with one of said conduits establishing fluid communication with one side of said piston and with the other of said conduits establishing fluid communication with the other side of said piston.
Claim 11
Dependent Claim
58 words
The structure as set forth in claim 9, wherein at least one of said fluid conduits includes: a flexible conduit section between said body and said cylinder which is adapted to expand when said bonnet is moved away from said body and to contract to its smallest dimension when said bonnet is returned into contact with said body.
Claim 12
Dependent Claim
23 words
The structure set forth in claim 10, wherein said flexible conduit section comprises: a coiled hose mounted between said body and said cylinder.
Claim 13
Dependent Claim
52 words
The structure set forth in claim 10, wherein said flexible conduit section comprises: a hinged conduit between said body and said cylinder which is folded to its smallest dimension when said bonnet is in contact with said body and is expanded by unfolding when said bonnet is moved away from said body.
Claim 14
Dependent Claim
41 words
The structure set forth in claim 10, including: a protective member carried by said body and covering at least the upper part of said flexible conduit section for protecting same from damage when said bonnet is in the open ram-exposed position.
Claim 15
Dependent Claim
190 words
A blowout preventer, comprising: a blowout preventer body having a central bore therethrough and a ram opening through the wall of said body on at least one side of said central opening and communicating with said central opening; a ram for said ram opening; a bonnet detachably connected to said body over said ram opening and adapted to receive said ram when it has been moved to an open position out of said central opening; an operating cylinder connected to said bonnet and movable therewith; a piston operably disposed in said cylinder and having a rod connected therefrom through said bonnet to said ram; two fluid conduits in said body and extending to said cylinder, with one of said conduits establishing fluid communication with one side of said piston and with the other of said conduits establishing fluid communication with the other side of said piston; and each of said fluid conduits having a flexible conduit section between said body and said cylinder which is adapted to extend when said bonnet is moved away from said body and to retract when said bonnet is returned into contact with said body.
Claim 16
Dependent Claim
190 words
A blowout preventer, comprising: a blowout preventer body having a central bore therethrough and a ram opening through the wall of said body on at least one side of said central opening and communicating with said central opening; a ram for said ram opening; a bonnet detachably connected to said body over said ram opening and adapted to receive said ram when it has been moved to an open position out of said central opening; an operating cylinder connected to said bonnet and movable therewith; a piston operably disposed in said cylinder and having a rod connected therefrom through said bonnet to said ram; two fluid conduits in said body and extending to said cylinder, with one of said conduits establishing fluid communication with one side of said piston and with the other of said conduits establishing fluid communication with the other side of said piston; and each of said fluid conduits having a flexible conduit section between said body and said cylinder which is adapted to extend when said bonnet is moved away from said body and to retract when said bonnet is returned into contact with said body.
Claim 17
Dependent Claim
23 words
The structure set forth in claim 14, wherein said flexible conduit section comprises: a coiled hose mounted between said body and said cylinder.
Claim 18
Dependent Claim
41 words
The structure set forth in claim 14, wherein said flexible conduit section comprises: a hinged conduit between said body and said cylinder which is extended by unfolding when said bonnet is moved away from said body and is retracted by folding.
Claim 19
Dependent Claim
41 words
The structure set forth in claim 14, including: a protective member carried by said body and covering at least the upper part of said flexible conduit section for protecting same from damage when said bonnet is in the open ram-exposed position.
Claim 20
Dependent Claim
235 words
A blowout preventer, comprising: a blowout preventer body having a central bore therethrough through which well pipe may pass, and a ram opening through the wall of said body on at least one side of said central opening and communicating with said central opening; a ram for said ram opening; a bonnet detachably connected to said body over said ram opening and adapted to receive said ram when it has been moved to an open position out of said central opening; an operating cylinder connected to said bonnet and movable therewith; a piston operably disposed in said cylinder and having a rod connected therefrom through said bonnet to said ram; fluid pressure means for supplying fluid under pressure to either side of each piston for controlling its movements to thereby control the movements of said ram to and from a closed position wherein said ram extends into said central opening in said preventer body and an open position wherein said central opening is unobstructed and said ram is disposed outwardly of said ram opening of said body; and a pair of support members carried by said body and extending into said bonnet for supporting said bonnet when in said open ram-exposing position; said support members having their upper surfaces lying in a plane substantially at or below the lowermost surface of said ram for permitting lateral movement of said ram for removal from said rod.
Claim 21
Dependent Claim
235 words
A blowout preventer, comprising: a blowout preventer body having a central bore therethrough through which well pipe may pass, and a ram opening through the wall of said body on at least one side of said central opening and communicating with said central opening; a ram for said ram opening; a bonnet detachably connected to said body over said ram opening and adapted to receive said ram when it has been moved to an open position out of said central opening; an operating cylinder connected to said bonnet and movable therewith; a piston operably disposed in said cylinder and having a rod connected therefrom through said bonnet to said ram; fluid pressure means for supplying fluid under pressure to either side of each piston for controlling its movements to thereby control the movements of said ram to and from a closed position wherein said ram extends into said central opening in said preventer body and an open position wherein said central opening is unobstructed and said ram is disposed outwardly of said ram opening of said body; and a pair of support members carried by said body and extending into said bonnet for supporting said bonnet when in said open ram-exposing position; said support members having their upper surfaces lying in a plane substantially at or below the lowermost surface of said ram for permitting lateral movement of said ram for removal from said rod.
Claim 22
Dependent Claim
28 words
The structure set forth in claim 18, including: means for releasably mounting said ram on said rod for releasable movement therefrom in either a vertical or lateral direction.
Claim 23
Dependent Claim
79 words
The structure set forth in claim 18, wherein: said fluid pressure means comprises a pair of flexible fluid conduit sections each of which is adapted to expand when said bonnet moves away from said body and assume its smallest dimension when said bonnet is in contact with said body; and each of said support members is disposed above one of said flexible fluid conduit sections to protect same from damage when said bonnet is in said open ram-exposing position.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |