US3752507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swivel
Assignee: ExxonMobil Upstream Research Co
•
Filing: 1971-10-01
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Granted: 1973-08-14
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Expires: 1991-10-01
Abstract
Abstract Two relatively rotatable, fluid conducting members of a swivel are interconnected by an improved assembly which includes a washpipe, mounting sleeves for connecting opposite ends of the washpipe to the fluid conducting members, and a tandem packing arrangement in at least one of the sleeves. A port formed in the sleeve containing the tandem packing arrangement communicates with the axial space separating the packings. Means are also provided for selectively locking each sleeve to the washpipe so that the packing in either sleeve can be made to function as a static seal or a dynamic seal depending on the position of the locking means. The improved washpipe assembly in one embodiment permits the swivel to be operated through two stages, and in another embodiment, through three stages before the packing must be replaced.
Inventors
- 👤 W Maurer
- 👤 J Miller
- 👤 I Hickman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:03
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/02; Y; Y10; Y10S; Y10S277/00; Y10S277/928
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
152 words
An assembly for interconnecting a pair of relatively rotatable, fluid conducting members which comprises: a tube; a first sleeve surrounding a portion of one end of said tube and being adapted for connection to one of said members; first and second packings mounted in said sleeve and being arranged therein to provide fluid seals between said sleeve and said tube at axially spaced intervals; means within said first sleeve for separately supporting said first and second packings; port means in said first sleeve for venting the space between said packings; means for selectively closing said port means; a second sleeve surrounding a portion of the other end of said tube and being adapted for connection to the other of said members; a packing mounted in said second sleeve for providing a fluid seal between said sleeve and said tube; and means for selectively locking said first and second sleeves to said tube.
Claim 2
Dependent Claim
152 words
An assembly for interconnecting a pair of relatively rotatable, fluid conducting members which comprises: a tube; a first sleeve surrounding a portion of one end of said tube and being adapted for connection to one of said members; first and second packings mounted in said sleeve and being arranged therein to provide fluid seals between said sleeve and said tube at axially spaced intervals; means within said first sleeve for separately supporting said first and second packings; port means in said first sleeve for venting the space between said packings; means for selectively closing said port means; a second sleeve surrounding a portion of the other end of said tube and being adapted for connection to the other of said members; a packing mounted in said second sleeve for providing a fluid seal between said sleeve and said tube; and means for selectively locking said first and second sleeves to said tube.
Claim 3
Dependent Claim
18 words
The invention as recited in claim 1 wherein said first and second packings each include self-energizing seal rings.
Claim 4
Dependent Claim
50 words
The invention as recited in claim 2 wherein each of said packings includes a ring of deformable resin and a metal anti-extrusion ring, said anti-extrusion ring being positioned adjacent the minimum gap between said sleeve and said tube in the sealed interval to prevent the extrusion of the resin ring.
Claim 5
Dependent Claim
129 words
An assembly for interconnecting a pair of relatively rotatable, fluid conducting members which comprises: a tube; first and second mounting sleeves for connecting opposite ends of said tube to said members, said sleeves being secured to said members and said tube being relatively rotatable with respect to said sleeves; first and second packings mounted in each of said sleeves for providing fluid seals between each of said sleeves and said tube at axially spaced intervals; means in each of said sleeves for separately supporting said first and second packings; port means in each of said sleeves for venting the space between said first and second packings contained therein; means for selectively closing each of said port means; and means for selectively locking each of said sleeves to said tube.
Claim 6
Dependent Claim
129 words
An assembly for interconnecting a pair of relatively rotatable, fluid conducting members which comprises: a tube; first and second mounting sleeves for connecting opposite ends of said tube to said members, said sleeves being secured to said members and said tube being relatively rotatable with respect to said sleeves; first and second packings mounted in each of said sleeves for providing fluid seals between each of said sleeves and said tube at axially spaced intervals; means in each of said sleeves for separately supporting said first and second packings; port means in each of said sleeves for venting the space between said first and second packings contained therein; means for selectively closing each of said port means; and means for selectively locking each of said sleeves to said tube.
Claim 7
Dependent Claim
26 words
The invention as recited in claim 4 wherein said first and second packings in each of said sleeves each includes a plurality of self-energizing seal rings.
Claim 8
Dependent Claim
114 words
In a swivel having two relatively rotatable, fluid conducting members interconnected by a washpipe assembly including a washpipe and sleeves for mounting the washpipe to said members, said washpipe being relatively rotatable with respect to both of said sleeves, the improvement wherein one of said sleeves contains a tandem packing for sealing the space between said one sleeve and said washpipe at axially spaced intervals, means for supporting each packing of said tandem packing within said one sleeve; port means in said one sleeve for venting the space between the packings of said tandem packing means mounted in the other of said sleeves for sealing the space between said other sleeve and said washpipe.
Claim 9
Dependent Claim
114 words
In a swivel having two relatively rotatable, fluid conducting members interconnected by a washpipe assembly including a washpipe and sleeves for mounting the washpipe to said members, said washpipe being relatively rotatable with respect to both of said sleeves, the improvement wherein one of said sleeves contains a tandem packing for sealing the space between said one sleeve and said washpipe at axially spaced intervals, means for supporting each packing of said tandem packing within said one sleeve; port means in said one sleeve for venting the space between the packings of said tandem packing means mounted in the other of said sleeves for sealing the space between said other sleeve and said washpipe.
Claim 10
Dependent Claim
56 words
The invention as recited in claim 6 wherein said packing includes a second tandem packing for sealing the space between said other sleeve and said washpipe at axially spaced intervals, port means in said other sleeve for venting the space between the packings of said second tandem packing, and means for selectively clOsing said port means.
Claim 11
Dependent Claim
202 words
A washpipe assembly for use in a drilling swivel having a stationary inlet conduit and a rotating tubular stem which comprises: a washpipe; an upper sleeve for connecting the upper end of said washpipe to said stationary inlet conduit; first and second packing assemblies positioned in said upper sleeve to fluid seal the radial space between said upper sleeve and said washpipe at axially spaced intervals; means in said upper sleeve for separately supporting said packing assemblies contained therein; port means in said upper sleeve for venting the space between said packing assemblies contained therein; means for selectively closing said port means in said upper sleeve; a lower sleeve for connecting the lower end of said washpipe to said rotating tubular stem; first and second packing assemblies positioned in said lower sleeve to fluid seal the radial space between said lower sleeve and said washpipe at axially spaced intervals; means in said lower sleeve for separately supporting said packing assemblies contained therein; port means in said lower sleeve for venting the space between said packing assemblies contained therein; means for selectively closing said port means in said lower sleeve; and means for selectively locking said upper and lower sleeves to said washpipe.
Claim 12
Dependent Claim
202 words
A washpipe assembly for use in a drilling swivel having a stationary inlet conduit and a rotating tubular stem which comprises: a washpipe; an upper sleeve for connecting the upper end of said washpipe to said stationary inlet conduit; first and second packing assemblies positioned in said upper sleeve to fluid seal the radial space between said upper sleeve and said washpipe at axially spaced intervals; means in said upper sleeve for separately supporting said packing assemblies contained therein; port means in said upper sleeve for venting the space between said packing assemblies contained therein; means for selectively closing said port means in said upper sleeve; a lower sleeve for connecting the lower end of said washpipe to said rotating tubular stem; first and second packing assemblies positioned in said lower sleeve to fluid seal the radial space between said lower sleeve and said washpipe at axially spaced intervals; means in said lower sleeve for separately supporting said packing assemblies contained therein; port means in said lower sleeve for venting the space between said packing assemblies contained therein; means for selectively closing said port means in said lower sleeve; and means for selectively locking said upper and lower sleeves to said washpipe.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |