US4089532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blowout preventer ram assembly
Assignee: Individual
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Filing: 1975-11-03
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Granted: 1978-05-16
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Expires: 1995-11-03
Abstract
Abstract A blowout preventer ram assembly adapted to seal the mouth of the hole of oil and gas wells in the process of their drilling. The ram assembly incorporates two rams, each of which comprises a ram rubber constituted by two arcuate members of larger and smaller radii, and a ram block provided with a projection is placed in the gap therebetween. The ram rubber is reinforced on the end faces by control members each of which consists of two parts. The first part is defined by two rigidly interconnected plates arranged in the arcuate member of the ram rubber of a smaller radius. One face of each plate has a radius corresponding to that of the largest pipe of the set of pipes to be sealed, while a second face is arranged parallel to the end face of the ram rubber, and a third face is arranged at an angle to the first face and is in contact with the ram block. The second part of the control member of the ram rubber is arranged in the arcuate member of a larger radius and has a guide for this part to move in a direction normal to the end face of the ram rubber. A cavity is provided between the arcuate member of the ram rubber of a smaller radius and the ram block, while on the inner surface of the ram holder, within the area of control members of the ram rubber, provision is made for grooves into which part of the ram rubber is displaced in the process of pipe sealing.
Inventors
- 👤 Arkady Ivanovich Kamyshnikov
- 👤 Alexandr Isaakovich Rutitsky
- 👤 Vladimir Mikhailovich Speransky
- 👤 Boris Konstantinovich Danin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:07
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/06; E21B33/061; E21B33/062
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
300 words
A blowout preventer ram assembly defined by two identical rams, each ram comprising: a resilient ram rubber constituted by arcuate members of larger and smaller radii, said arcuate members being mounted with a gap therebetween and being interconnected with their end faces by a connecting piece disposed in a plane perpendicular to the direction of ram movement; a ram block arranged in said gap and provided with a projection hanging over said arcuate member of smaller radius; a holder, said holder embracing said ram rubber together with the ram block; rigid rubber-flow control members arranged in said end faces of the ram rubber and the connecting pieces, wherein the same are connected, each of said latter members being constituted by first and second conjugated parts; the first of said conjugated parts being fixed in position on the surface of said arcuate member of smaller radius, facing said projection of the ram block and being a plate having one face parallel to the end face of connecting piece of said ram rubber, a second face of said plate, facing the pipe to be sealed, and being arc-shaped, and a third face of said plate facing said ram block, and being arranged at an angle to said first plate face, with a portion of said ram block being in contact with said third face of the plate and inclined at the same angle with respect to said first face of the plate for sliding camming engagement by said ram block upon movement of the ram to a pipe engaging position; the second of said conjugated parts fixed in position in the end face of said arcuate member of larger radius and having a guide for said first part to move in a direction normal to said end face of the ram rubber.
Claim 2
Dependent Claim
300 words
A blowout preventer ram assembly defined by two identical rams, each ram comprising: a resilient ram rubber constituted by arcuate members of larger and smaller radii, said arcuate members being mounted with a gap therebetween and being interconnected with their end faces by a connecting piece disposed in a plane perpendicular to the direction of ram movement; a ram block arranged in said gap and provided with a projection hanging over said arcuate member of smaller radius; a holder, said holder embracing said ram rubber together with the ram block; rigid rubber-flow control members arranged in said end faces of the ram rubber and the connecting pieces, wherein the same are connected, each of said latter members being constituted by first and second conjugated parts; the first of said conjugated parts being fixed in position on the surface of said arcuate member of smaller radius, facing said projection of the ram block and being a plate having one face parallel to the end face of connecting piece of said ram rubber, a second face of said plate, facing the pipe to be sealed, and being arc-shaped, and a third face of said plate facing said ram block, and being arranged at an angle to said first plate face, with a portion of said ram block being in contact with said third face of the plate and inclined at the same angle with respect to said first face of the plate for sliding camming engagement by said ram block upon movement of the ram to a pipe engaging position; the second of said conjugated parts fixed in position in the end face of said arcuate member of larger radius and having a guide for said first part to move in a direction normal to said end face of the ram rubber.
Claim 3
Dependent Claim
36 words
The blowout preventer ram assembly as claimed in claim 1 wherein said arcuate face of the plate has a radius corresponding to that of the largest diameter pipe of the set of pipes to be sealed.
Claim 4
Dependent Claim
169 words
The blowout preventer ram assembly, as claimed in claim 1, wherein the portion of the arcuate member of smaller radius, arranged between the control members of said ram rubber on the side of the ram block projection is a portion of said ram rubber on the side of the pipe to be sealed and protrudes in a radial direction with respect to said projection, thus defining a cavity together with said projection, and on the inner surface of the holder, in which said control members of ram rubber are arranged, provision is made for slots, and the height of the ram rubber member of greater radius within the area of said slots is increased as compared to the remaining portion of said ram rubber member, with the space of said cavity and the slots being selected depending on the amount of the material of the ram rubber displaced to said cavity and said slots when the smallest-diameter pipe of the set of pipes to be sealed is being sealed.
Claim 5
Dependent Claim
36 words
The blowout preventer ram assembly as claimed in claim 3, wherein said cavity is formed by a slot made in the ram block on the surface thereof facing the arcuate ram rubber member of smaller diameter.
Claim 6
Dependent Claim
24 words
The blowout preventer ram assembly as claimed in claim 3, wherein said cavity is provided in the arcuate ram rubber member of smaller diameter.
Claim 7
Dependent Claim
93 words
The blowout preventer ram assembly, as claimed in claim 1, wherein the ram block is provided with an additional projection and both said projections of the ram block embrace the arcuate member of the ram rubber of smaller radius, while said first part of the control member is provided with an additional plate identical to said first plate, with both said plates being arranged within the area of the connecting piece of said ram rubber on the surface of the arcuate member of smaller radius, facing an associated projection of the ram block.
Claim 8
Dependent Claim
16 words
The blowout preventer ram assembly as claimed in claim 6, wherein said plates are rigidly interconnected.
Claim 9
Dependent Claim
88 words
The blowout preventer ram assembly as claimed in claim 1, wherein the second part of the control member of the ram rubber is constituted by a bracket whose end face portions contacting the ram block are oriented normal to the end faces of the ram rubber and the first part of the control member of the ram rubber is arranged therebetween, with the ends of the bracket being provided with pins arranged parallel to the end face of the ram rubber and making contact with the ram holder.
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) | 1981-05-15 | 1981-11-14 | 1982-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-15 | 1985-11-14 | 1986-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-15 | 1989-11-14 | 1990-05-16 | $7700.00 | Window Closed / Lapsed |