Patent US3572628A successfully refreshed from Google Patents.
US3572628A
Expired / Lapsed
US
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Blowout preventer
Assignee: Cooper Industries LLC
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Filing: 1968-10-04
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Granted: 1971-03-30
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Expires: 1988-10-04
Abstract
Abstract An annular blowout preventer comprising a housing having a bore through it and an annular recess extending outwardly from the bore, and a packer within the recess including an annulus of deformable material having a bore aligned with the housing bore and a circular series of rigid inserts extending therethrough from one end to the other. A sealing surface on an end portion of the annulus engages the oppositely facing end surface of the recess, and there are radially movable parts about the outer side of the annulus for constricting the packer to urge its bore into position to seal about a member in the bore of the housing or upon itself when the bore is empty. The packer is symmetrical end-for-end so that it may be disposed with either end up, and each of the rigid inserts includes a rib which has opposite sides lying generally in planes of least strain of the deformable material of the annulus during radial movement of the inserts upon constriction of the packer.
Inventors
- 👤 Marvin R Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:21
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/06
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
106 words
A packer for disposal within a recess in the bore of the housing of an annular blowout preventer, comprising an annulus of deformable material, and a substantially circular series of rigid, circumferentially relatively movable inserts including ribs extending through the annulus from one end to the other, and flanges on the ends of the ribs on at least one end of the annulus, said annulus having an annular surface at said one end which is substantially coplanar with the end surfaces of said flanges for sealing against an oppositely facing end surface of the housing recess and the outer side of said annulus being radially constrictible.
Claim 2
Dependent Claim
106 words
A packer for disposal within a recess in the bore of the housing of an annular blowout preventer, comprising an annulus of deformable material, and a substantially circular series of rigid, circumferentially relatively movable inserts including ribs extending through the annulus from one end to the other, and flanges on the ends of the ribs on at least one end of the annulus, said annulus having an annular surface at said one end which is substantially coplanar with the end surfaces of said flanges for sealing against an oppositely facing end surface of the housing recess and the outer side of said annulus being radially constrictible.
Claim 3
Dependent Claim
22 words
A packer of the character defined in claim 1, wherein said annular sealing surface is adjacent the outer side of said annulus.
Claim 4
Dependent Claim
29 words
A packer of the character defined in claim 1, wherein said annular sealing surface protrudes beyond the end surfaces of the flanges at said one end of the annulus.
Claim 5
Dependent Claim
51 words
A packer of the character defined in claim 1, wherein there are flanges on both ends of the rib, and there is a sealing surface on each end of the annulus, so that the packer may be disposed with either end for sealing against said end surface of the housing recess.
Claim 6
Dependent Claim
134 words
A packer for disposal within the housing of an annular blowout preventer, comprising an annulus of resilient material having a bore extending axially therethrough and an outer, radially constrictible side concentric with the bore, and a substantially circular series of rigid, circumferentially relatively movable inserts extending through the annulus from one end surface to the other, each said insert including a riB having a flange extending laterally thereof at each end, each flange having a radially outermost surface which is spaced inwardly of the outer side of the annulus, and the portion of said annulus which surrounds the outermost surfaces of the flanges at each end of the annulus having a surface which is substantially coplanar with the adjacent end surfaces of said flanges for sealing against an oppositely facing surface of the housing.
Claim 7
Dependent Claim
134 words
A packer for disposal within the housing of an annular blowout preventer, comprising an annulus of resilient material having a bore extending axially therethrough and an outer, radially constrictible side concentric with the bore, and a substantially circular series of rigid, circumferentially relatively movable inserts extending through the annulus from one end surface to the other, each said insert including a riB having a flange extending laterally thereof at each end, each flange having a radially outermost surface which is spaced inwardly of the outer side of the annulus, and the portion of said annulus which surrounds the outermost surfaces of the flanges at each end of the annulus having a surface which is substantially coplanar with the adjacent end surfaces of said flanges for sealing against an oppositely facing surface of the housing.
Claim 8
Dependent Claim
23 words
A packer of the character defined in claim 5, wherein each said sealing surface protrudes beyond the adjacent end surfaces of the flanges.
Claim 9
Dependent Claim
139 words
An annular blowout preventer, comprising a housing having a bore therethrough and an annular recess extending outwardly from the bore, a packer comprising an annulus of resilient material within the recess and having a bore therethrough substantially axially aligned with the bore through the housing, and a substantially circular series of rigid, circumferentially relatively movable inserts in the annulus, one end of the annulus having an annular surface for engaging the oppositely facing end of the recess, and radially reciprocable actuators within the recess and in circumferentially noncontinuous sealing engagement about the outer side of the annulus for constricting the annulus and for urging said annular surface into tight sealing engagement with said end of the recess, the inner edges of the ends of said rigid inserts entering the bore of said housing as the annulus is so constricted.
Claim 10
Dependent Claim
139 words
An annular blowout preventer, comprising a housing having a bore therethrough and an annular recess extending outwardly from the bore, a packer comprising an annulus of resilient material within the recess and having a bore therethrough substantially axially aligned with the bore through the housing, and a substantially circular series of rigid, circumferentially relatively movable inserts in the annulus, one end of the annulus having an annular surface for engaging the oppositely facing end of the recess, and radially reciprocable actuators within the recess and in circumferentially noncontinuous sealing engagement about the outer side of the annulus for constricting the annulus and for urging said annular surface into tight sealing engagement with said end of the recess, the inner edges of the ends of said rigid inserts entering the bore of said housing as the annulus is so constricted.
Claim 11
Dependent Claim
33 words
A blowout preventer of the character defined in claim 7, wherein the annulus has an annular surface at each end for engaging the end of the recess regardless of which end is up.
Claim 12
Dependent Claim
48 words
A blowout preventer of the character defined in claim 7, wherein said actuators include circumferentially separated, laterally extending segments having inner arcuate surfaces for substantially surrounding the outer side of the annulus within the recess, and pistons reciprocable within the housing for moving the segments inwardly and outwardly.
Claim 13
Dependent Claim
52 words
A packer for use in an annular blowout preventer, comprising an annulus of deformable material, and a substantially circular series of rigid inserts bonded to the annulus, each insert including a rib having opposite sides which lie generally within planes of least strain in said material as the annulus is radially constricted.
Claim 14
Dependent Claim
52 words
A packer for use in an annular blowout preventer, comprising an annulus of deformable material, and a substantially circular series of rigid inserts bonded to the annulus, each insert including a rib having opposite sides which lie generally within planes of least strain in said material as the annulus is radially constricted.
Claim 15
Dependent Claim
25 words
A packer of the character defined in claim 10, wherein each insert also includes a flange overhanging the rib at each end of the annulus.
Claim 16
Dependent Claim
70 words
A packer for use in an annular blowout preventer, comprising an annulus of deformable material, and a substantially circular series of rigid inserts bonded to the annulus, each said insert including a rib having flat sides disposed at acute angles to any radii of the annulus intersecting said sides and lying generally within planes of least strain in said material as the outer diameter of said annulus is radially constricted.
Claim 17
Dependent Claim
70 words
A packer for use in an annular blowout preventer, comprising an annulus of deformable material, and a substantially circular series of rigid inserts bonded to the annulus, each said insert including a rib having flat sides disposed at acute angles to any radii of the annulus intersecting said sides and lying generally within planes of least strain in said material as the outer diameter of said annulus is radially constricted.
Claim 18
Dependent Claim
25 words
A packer of the character defined in claim 12, wherein each insert also includes a flange overhanging the rib at each end of the annulus.
Claim 19
Dependent Claim
84 words
An annular blowout preventer, comprising a housing having a bore therethrough an an annular recess extending outwardly from the bore, a packer comprising an annulus of resilient material within the recess and having a bore therethrough substantially axially aligned with the bore through the housing, and a substantially circular series of rigid inserts bonded to the annulus, each said insert including a rib having its opposite sides lying generally within planes of least strain in said deformable material as the annulus is radially constricted.
Claim 20
Dependent Claim
84 words
An annular blowout preventer, comprising a housing having a bore therethrough an an annular recess extending outwardly from the bore, a packer comprising an annulus of resilient material within the recess and having a bore therethrough substantially axially aligned with the bore through the housing, and a substantially circular series of rigid inserts bonded to the annulus, each said insert including a rib having its opposite sides lying generally within planes of least strain in said deformable material as the annulus is radially constricted.
Claim 21
Dependent Claim
34 words
An annular blowout preventer of the character defined in claim 14, wherein the inner edge of each end of each said insert moves into the bore of the housing upon constriction of the annulus.
Claim 22
Dependent Claim
98 words
An annular blowout preventer, comprising a housing having a bore therethrough and an annular recess extending outwardly from the bore, a packer comprising an annulus of resilient material within the recess and having a bore therethrough substantially axially aligned with the bore through the housing, and a substantially circular series of rigid inserts bonded to the annulus, each said insert including a rib having sides disposed at acute angles to radii of the annulus intersecting said sides and lying generally within planes of least strain in said material as the outer diameter of said annulus is radially constricted.
Claim 23
Dependent Claim
98 words
An annular blowout preventer, comprising a housing having a bore therethrough and an annular recess extending outwardly from the bore, a packer comprising an annulus of resilient material within the recess and having a bore therethrough substantially axially aligned with the bore through the housing, and a substantially circular series of rigid inserts bonded to the annulus, each said insert including a rib having sides disposed at acute angles to radii of the annulus intersecting said sides and lying generally within planes of least strain in said material as the outer diameter of said annulus is radially constricted.
Claim 24
Dependent Claim
34 words
An annular blowout preventer of the character defined in claim 16, wherein the inner edge of each end of each said insert moves into the bore of the housing upon constriction of the annulus.
Claim 25
Dependent Claim
99 words
A rigid insert for the packer of an annular blowout preventer, comprising a rib having flat, parallel sides, and a flange at each end of the rib which overhangs the rib on all sides, the rib having sides extending at acute angles with respect to a plane bisecting the flanges and lying generally within planes of least strain in the resilient material of said packer when the insert is arranged within and bonded to said material to dispose its flanges at opposite ends of the packer and dispose said bisecting plane generally coincident with a radius of the packer.
Claim 26
Dependent Claim
99 words
A rigid insert for the packer of an annular blowout preventer, comprising a rib having flat, parallel sides, and a flange at each end of the rib which overhangs the rib on all sides, the rib having sides extending at acute angles with respect to a plane bisecting the flanges and lying generally within planes of least strain in the resilient material of said packer when the insert is arranged within and bonded to said material to dispose its flanges at opposite ends of the packer and dispose said bisecting plane generally coincident with a radius of the packer.
Claim 27
Dependent Claim
134 words
An annular blowout preventer, comprising a housing having a bore therethrough and an annular recess about the bore, an annular packer within the recess, a series of cylinders extending into the housing from its outer side, a piston sealably slidable within each cylinder, packer constricting segments within the housing recess about the outer side of the packer, rods extending sealably within the housing to connect each segment with a piston, a fluid connection with each cylinder on the inner side of the piston therein, a ring disposable about the outer side of the housing to cover the outer ends of the cylinders, means sealing between said outer side of the housing and the ring to form an annular space communicating with the outer end of each piston, and a fluid connection to the space.
Claim 28
Dependent Claim
134 words
An annular blowout preventer, comprising a housing having a bore therethrough and an annular recess about the bore, an annular packer within the recess, a series of cylinders extending into the housing from its outer side, a piston sealably slidable within each cylinder, packer constricting segments within the housing recess about the outer side of the packer, rods extending sealably within the housing to connect each segment with a piston, a fluid connection with each cylinder on the inner side of the piston therein, a ring disposable about the outer side of the housing to cover the outer ends of the cylinders, means sealing between said outer side of the housing and the ring to form an annular space communicating with the outer end of each piston, and a fluid connection to the space.
Claim 29
Dependent Claim
168 words
An annular blowout preventer, comprising a housing having a bore therethrough an an annular recess extending outwardly from the bore, a packer comprising an annulus of resilient material within the recess and having a bore therethrough substantially axially aligned with the bore through the housing, and a substantially circular series of rigid, circumferentially relatively movable inserts in the annulus, one end of the annulus having an annular surface for engaging the oppositely facing end of the recess, radially reciprocable actuators within the recess and in circumferentially noncontinuous sealing engagement about the outer side of the annulus for constricting the annulus and for urging said annular surface into tight sealing engagement with said end of the recess, the inner edges of the ends of said rigid inserts entering the bore of said housing as the annulus is so constricted, and means for admitting fluid from the end of the bore which connects with the other end of the recess to the outer side of the annulus within said recess.
Claim 30
Dependent Claim
168 words
An annular blowout preventer, comprising a housing having a bore therethrough an an annular recess extending outwardly from the bore, a packer comprising an annulus of resilient material within the recess and having a bore therethrough substantially axially aligned with the bore through the housing, and a substantially circular series of rigid, circumferentially relatively movable inserts in the annulus, one end of the annulus having an annular surface for engaging the oppositely facing end of the recess, radially reciprocable actuators within the recess and in circumferentially noncontinuous sealing engagement about the outer side of the annulus for constricting the annulus and for urging said annular surface into tight sealing engagement with said end of the recess, the inner edges of the ends of said rigid inserts entering the bore of said housing as the annulus is so constricted, and means for admitting fluid from the end of the bore which connects with the other end of the recess to the outer side of the annulus within said recess.
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |