Patent US3625283A successfully refreshed from Google Patents.
US3625283A
Expired / Lapsed
US
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Well bore casing hanger apparatus
Assignee: Vetco Inc
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Filing: 1970-05-15
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Granted: 1971-12-07
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Expires: 1990-05-15
Abstract
Abstract A casing hanger body is threadedly connected to a running tool secured to a running string, the tool being clutched or otherwise coupled to a seal structure, which is also threadedly connected to the body, the running string being used to lower the apparatus through a body of water to engage the hanger body with a seat in an underwater wellhead housing, and to locate its seal structure between the housing and body and in an initial position in which a fluid circulation path is open, the running string and running tool being rotated to thread the tool and seal assembly simultaneously along the hanger body to release the running tool from the body and place the seal structure in a position closing the circulation path, after which the running string and running tool may be retrieved. A plurality of such casing hanger apparatus can be placed or stacked one upon the other to support different sizes of concentric casing strings in the underwater well bore, the circulation path associated with each apparatus being closed by a seal structure. A tubing hanger may be landed on the uppermost hanger apparatus and locked to the threaded portion of the uppermost hanger body.
Inventors
- 👤 Arthur G Ahlstone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:17
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/043
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
200 words
In well bore casing apparatus: an outer body having a seat therein; an inner body for suspending a tubular string in a well bore and movable into engagement with said seat; passage means for allowing fluid flow between said inner and outer bodies; a seal structure on said inner body; first means for connecting said seal structure to the exterior of said inner body, whereby rotation of said seal structure in one direction moves said seal structure longitudinally of said inner body in one direction to a position closing said passage means; a running tool connectable to a running string; second means for releasably connecting said running tool to the exterior of said inner body, whereby rotation of said running tool in said one direction moves said first means in said one longitudinal direction and disconnects said running tool from the exterior oF said inner body; and third means for releasably connecting said running tool to said seal structure, whereby rotation of said running tool in said one direction releases said second means to disconnect said running tool from the exterior of said inner body and move said seal structure along said body to its position closing said passage means.
Claim 2
Dependent Claim
200 words
In well bore casing apparatus: an outer body having a seat therein; an inner body for suspending a tubular string in a well bore and movable into engagement with said seat; passage means for allowing fluid flow between said inner and outer bodies; a seal structure on said inner body; first means for connecting said seal structure to the exterior of said inner body, whereby rotation of said seal structure in one direction moves said seal structure longitudinally of said inner body in one direction to a position closing said passage means; a running tool connectable to a running string; second means for releasably connecting said running tool to the exterior of said inner body, whereby rotation of said running tool in said one direction moves said first means in said one longitudinal direction and disconnects said running tool from the exterior oF said inner body; and third means for releasably connecting said running tool to said seal structure, whereby rotation of said running tool in said one direction releases said second means to disconnect said running tool from the exterior of said inner body and move said seal structure along said body to its position closing said passage means.
Claim 3
Dependent Claim
22 words
In apparatus as defined in claim 1; wherein said first means comprises a threaded connection between said seal structure and inner body.
Claim 4
Dependent Claim
22 words
In apparatus as defined in claim 1; wherein said second means comprises a threaded connection between said running tool and inner body.
Claim 5
Dependent Claim
46 words
In apparatus as defined in claim 1; wherein said first and second means comprise an external thread on said inner body, an internal thread on said seal structure meshing with said external thread, and an internal thread on said running tool meshing with said external thread.
Claim 6
Dependent Claim
64 words
In apparatus as defined in claim 1; wherein said first and second means comprise an external thread on said inner body, an internal thread on said seal structure meshing with said external thread, and an internal thread on said running tool meshing with said external thread; said third means comprising clutch means on said running tool meshing with clutch means on said seal structure.
Claim 7
Dependent Claim
122 words
In well bore casing apparatus: an outer body having a seat therein; an inner body for suspending a tubular string in a well bore and movable into engagement with said seat; passage means for allowing fluid flow between said inner and outer bodies; a seal structure disposed initially in a lower position on said inner body with said passage means open when said inner body engages said seat; a running tool connectable to a running string; means for releasably connecting said running tool to said inner body for lowering said inner body and seal structure and to engage said inner body with said seat; and means for elevating said seal structure along said inner body to a position closing said passage means.
Claim 8
Dependent Claim
122 words
In well bore casing apparatus: an outer body having a seat therein; an inner body for suspending a tubular string in a well bore and movable into engagement with said seat; passage means for allowing fluid flow between said inner and outer bodies; a seal structure disposed initially in a lower position on said inner body with said passage means open when said inner body engages said seat; a running tool connectable to a running string; means for releasably connecting said running tool to said inner body for lowering said inner body and seal structure and to engage said inner body with said seat; and means for elevating said seal structure along said inner body to a position closing said passage means.
Claim 9
Dependent Claim
51 words
In apparatus as defined in claim 6; said elevating means comprising a threaded connection between said seal structure and inner body, and means for transmitting rotation of said running tool to said seal structure to thread said seal structure upwardly along said inner body to the position closing said passage means.
Claim 10
Dependent Claim
53 words
In apparatus as defined in claim 6; said elevating means comprising a left-hand threaded connection between said seal structure and inner body, and means for transmitting right-hand rotation of said running tool to said seal structure to thread said seal structure upwardly along said inner body to the position closing said passage means.
Claim 11
Dependent Claim
86 words
In apparatus as defined in claim 6; said passage means comprising first port means in said inner body, second port means in said seal structure communicable with said first port means when said seal structure is in said lower position on said inner body; said seal structure comprising seal means below said second port means and located initially below said first port means and movable to a position above said first port means upon elevation of said seal structure to a position closing said passage means.
Claim 12
Dependent Claim
132 words
In apparatus as defined in claim 6; said elevating means comprising a left-hand threaded connection between said seal structure and inner body, and means for transmitting right-hand rotation of said running tool to said seal structure to thread said seal structure upwardly along said inner body to the position closing said passage means; said passage means comprising first port means in said inner body, second port means in said seal structure communicable with said first port means when said seal structure is in said lower position on said inner body; said seal structure comprising seal means below said second port means and located initially below said first port means and movable to a position above said first port means upon elevation of said seal structure to a position closing said passage means.
Claim 13
Dependent Claim
147 words
IN well bore casing apparatus: an outer body having a seat therein; an inner body for suspending a tubular string in a well bore and movable into engagement with said seat; passage means for allowing fluid flow between said inner and outer bodies; a seal structure on said inner body; first means for mounting said seal structure on the exterior of said inner body for movement of said seal structure longitudinally of said inner body to a position closing said passage means; a running tool connectable to a running string; second means above said first means for releasably connecting said running tool to the exterior of said body; and third means for releasably connecting said running tool to said seal structure, whereby manipulation of said running tool releases said second means and moves said seal structure along said inner body to its position closing said passage means.
Claim 14
Dependent Claim
147 words
IN well bore casing apparatus: an outer body having a seat therein; an inner body for suspending a tubular string in a well bore and movable into engagement with said seat; passage means for allowing fluid flow between said inner and outer bodies; a seal structure on said inner body; first means for mounting said seal structure on the exterior of said inner body for movement of said seal structure longitudinally of said inner body to a position closing said passage means; a running tool connectable to a running string; second means above said first means for releasably connecting said running tool to the exterior of said body; and third means for releasably connecting said running tool to said seal structure, whereby manipulation of said running tool releases said second means and moves said seal structure along said inner body to its position closing said passage means.
Claim 15
Dependent Claim
22 words
In apparatus as defined in claim 11; wherein said first means comprises a threaded connection between said seal structure and inner body.
Claim 16
Dependent Claim
22 words
In apparatus as defined in claim 11; wherein said second means comprises a threaded connection between said running tool and inner body.
Claim 17
Dependent Claim
46 words
In apparatus as defined in claim 11; wherein said first and second means comprise an external thread on said inner body, an internal thread on said seal structure meshing with said external thread, and an internal thread on said running tool meshing with said external thread.
Claim 18
Dependent Claim
60 words
In apparatus as defined in claim 11; wherein said first and second means comprise an external thread on said inner body, an internal thread on said seal structure meshing with said external thread on said running tool meshing with said external thread; said third means comprising clutch means on said running tool meshing with clutch means on said seal structure.
Claim 19
Dependent Claim
48 words
In apparatus as defined in claim 11; wherein said first and second means comprise an external left-hand thread on said body, an internal left-hand thread on said seal structure meshing with said external thread, and an internal left-hand thread on said running tool meshing with said external thread.
Claim 20
Dependent Claim
166 words
In well bore casing apparatus: an outer body having a seat therein; an inner body for suspending a tubular string in a well bore and movable into engagement with said seat; passage means for allowing fluid flow between said inner and outer bodies; a seal structure disposed initially in a lower position on said inner body with said passage means open when said inner body engages said seat; first means for mounting said seal structure on the exterior of said inner body for upward movement of said seal structure along said inner body to a position closing said passage means; a running tool connectable to a running string; second means above said first means for releasably connecting said running tool to the exterior of said inner body; and third means for releasably connecting said running tool to said seal structure, whereby manipulation of said running tool releases said second means and elevates said seal structure along said inner body to its position closing said passage means.
Claim 21
Dependent Claim
166 words
In well bore casing apparatus: an outer body having a seat therein; an inner body for suspending a tubular string in a well bore and movable into engagement with said seat; passage means for allowing fluid flow between said inner and outer bodies; a seal structure disposed initially in a lower position on said inner body with said passage means open when said inner body engages said seat; first means for mounting said seal structure on the exterior of said inner body for upward movement of said seal structure along said inner body to a position closing said passage means; a running tool connectable to a running string; second means above said first means for releasably connecting said running tool to the exterior of said inner body; and third means for releasably connecting said running tool to said seal structure, whereby manipulation of said running tool releases said second means and elevates said seal structure along said inner body to its position closing said passage means.
Claim 22
Dependent Claim
51 words
In apparatus as defined in claim 17; said first means comprising a threaded connection between said seal structure and inner body; said third means transmitting rotation of said running tool to said seal structure to thread said seal structure upwardly along said inner body to its position closing said passage means.
Claim 23
Dependent Claim
22 words
In apparatus as defined in claim 17; wherein said second means comprises a threaded connection between said running tool and inner body.
Claim 24
Dependent Claim
46 words
In apparatus as defined in claim 17; wherein said first and second means comprise an external thread on said inner body, an internal thread on said seal structure meshing with said external thread, and an internal thread on said running tool meshing with said external thread.
Claim 25
Dependent Claim
86 words
In apparatus as defined in claim 17; said passage means comprising first port means in said inner body, second port means in said seal structure communicable with said first port means when said seal structure is in said lower position on said inner body; said seal structure comprising seal means below said second port means and located initially below said first port means and movable to a position above said first port means upon elevation of said seal structure to a position closing said passage means.
Claim 26
Dependent Claim
125 words
In apparatus as defined in claim 17; wherein said first and second means comprise an external thread on said inner body, an internal thread on said seal structure meshing with said external thread, and an internal thread on said running tool meshing with said external thread; said passage means comprising first port means in said inner body, second port means in said seal structure communicable with said first port means when said seal structure is in said lower position on said inner body; said seal structure comprising seal means below said second port means and located initially below said first port means and movable to a position above said first port means upon elevation of said seal structure to a position closing said passage means.
Claim 27
Dependent Claim
49 words
In apparatus as defined in claim 17; wherein said first and second means comprise an external left-hand thread on said inner body, an internal left-hand thread on said seal structure meshing with said external thread, and an internal left-hand thread on said running tool meshing with said external thread.
Claim 28
Dependent Claim
128 words
In apparatus as defined in claim 17; wherein said first and second means comprise an external left-hand thread on said inner body, an internal left-hand thread on said seal structure meshing with said external thread, and an internal left-hand thread on said running tool meshing with said external thread; said passage means comprising first port means in said inner body, second port means in said seal structure communicable with said first port means when said seal structure is in said lower position on said inner body; said seal structure comprising seal means below said second port means and located initially below said first port means and movable to a position above said first port means upon elevation of said seal structure to a position closing said passage means.
Claim 29
Dependent Claim
28 words
In apparatus as defined in claim 1; a tubing hanger in said inner body; and means for securing said tubing hanger to the exterior of said inner body.
Claim 30
Dependent Claim
46 words
In apparatus as defined in claim 1; wherein said second means comprises a threaded connection between said running tool and inner body; a tubing hanger in said inner body; and means for securing said tubing hanger to the upper body threaded portion of said threaded connection.
Claim 31
Dependent Claim
112 words
In well bore casing apparatus: an outer body having a seat therein; an inner body for supporting a tubular string in a well bore and movable into engagement with said seat; passage means for allowing fluid flow between said inner and outer bodies; a seal structure on said inner body; means for connecting said seal structure to the exterior of said inner body for movement of said seal structure along said body to a position closing said passage means; a tubing hanger seated in said inner body; and coupling means connected to the exterior of said inner body and engaging said tubing hanger for securing said tubing hanger to said inner body.
Claim 32
Dependent Claim
112 words
In well bore casing apparatus: an outer body having a seat therein; an inner body for supporting a tubular string in a well bore and movable into engagement with said seat; passage means for allowing fluid flow between said inner and outer bodies; a seal structure on said inner body; means for connecting said seal structure to the exterior of said inner body for movement of said seal structure along said body to a position closing said passage means; a tubing hanger seated in said inner body; and coupling means connected to the exterior of said inner body and engaging said tubing hanger for securing said tubing hanger to said inner body.
Claim 33
Dependent Claim
39 words
In apparatus as defined in claim 27; said connecting means comprising a threaded connection between said seal structure and exterior of said inner body; said coupling means being connected to the inner body threaded portion of said threaded connection.
Claim 34
Dependent Claim
166 words
In well bore casing apparatus: an outer body having a seat therein; an inner body for supporting a tubular string in a well bore and movable into engagement with said seat; passage means for allowing fluid flow between said inner and outer bodies; a seal structure on said inner body; means for connecting said seal structure to the exterior of said inner body for movement of said seal structure along said body to a position closing said passage means; a tubing haNger in said inner body; and coupling means connected to the exterior of said inner body for securing said tubing hanger to said inner body; said connecting means comprising a threaded connection between said seal structure and exterior of said inner body, the upper portion of the external thread of said threaded connection on said inner body being exposed when said seal structure is in its position closing said passage means; said coupling means being threadedly connected to said exposed thread on said inner body.
Claim 35
Dependent Claim
166 words
In well bore casing apparatus: an outer body having a seat therein; an inner body for supporting a tubular string in a well bore and movable into engagement with said seat; passage means for allowing fluid flow between said inner and outer bodies; a seal structure on said inner body; means for connecting said seal structure to the exterior of said inner body for movement of said seal structure along said body to a position closing said passage means; a tubing haNger in said inner body; and coupling means connected to the exterior of said inner body for securing said tubing hanger to said inner body; said connecting means comprising a threaded connection between said seal structure and exterior of said inner body, the upper portion of the external thread of said threaded connection on said inner body being exposed when said seal structure is in its position closing said passage means; said coupling means being threadedly connected to said exposed thread on said inner body.
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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |