US3765494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circulating sleeve
Assignee: Sperry Sun Well Surveying Co
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Filing: 1972-04-21
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Granted: 1973-10-16
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Expires: 1992-04-21
Abstract
Abstract In a drilling system, a subassembly provides a means for seating an instrument housing in the drill string during a drilling operation and for permitting a normal flow of drilling fluids around the instrument housing. The seat also provides means for orienting the instrument housing in a predetermined position relative to a portion of the drill system.
Inventors
- 👤 F Kielman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:21
CPC Classifications
E; E21; E21B; E21B17/00; E21B23/00; E21B23/02; E21B47/00; E21B47/01
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
In a drilling system utilizing a hollow conduit for carrying a drilling fluid means for seating an instrument housing within the conduit while performing a drilling operation, which means includes: a seat formed within the bore of said conduit, a sleeve sized for reception within the bore of said conduit, shoulder means on one end of said sleeve for providing a mating reception of said sleeve within said seat, said shoulder means being sized for close fitting reception within said conduit, a plurality of longitudinal ribs on said sleeve extending above said shoulder means and key means extending inwardly from said sleeve for orienting an instrument housing.
Claim 2
Dependent Claim
107 words
In a drilling system utilizing a hollow conduit for carrying a drilling fluid means for seating an instrument housing within the conduit while performing a drilling operation, which means includes: a seat formed within the bore of said conduit, a sleeve sized for reception within the bore of said conduit, shoulder means on one end of said sleeve for providing a mating reception of said sleeve within said seat, said shoulder means being sized for close fitting reception within said conduit, a plurality of longitudinal ribs on said sleeve extending above said shoulder means and key means extending inwardly from said sleeve for orienting an instrument housing.
Claim 3
Dependent Claim
24 words
The apparatus of claim 1 and further including a transverse opening extending through one of said ribs and sleeve for receiving said key means.
Claim 4
Dependent Claim
19 words
The apparatus of claim 1 and further including means of locking said sleeve against relative movement with said conduit.
Claim 5
Dependent Claim
42 words
The apparatus of claim 3 wherein said locking means extends through the wall of said conduit and further including seal means on said shoulder arranged to be positioned above and below said locking means when said sleeve is seated in said conduit.
Claim 6
Dependent Claim
149 words
A circulating sleeve for seating and orienting an instrument housing within the bore of a drill pipe during a drilling operation and arranged to permit the flow of fluids through the drill pipe when an instrument housing is positioned therein, comprising: a sleeve for reception within the bore of the pipe, and having a cylindrical portion with longitudinal ribs formed thereon for engaging the bore of the pipe and maintain said cylindrical portion in a spaced position from said bore; a shoulder formed on said sleeve for engaging a seat in the pipe; key means extending from the wall of said cylindrical portion into its bore for engaging a portion of the instrument housing to orient the housing with respect to said sleeve; and means on said sleeve for receiving a member extending from the wall of the pipe for holding said sleeve against rotation relative to the pipe.
Claim 7
Dependent Claim
149 words
A circulating sleeve for seating and orienting an instrument housing within the bore of a drill pipe during a drilling operation and arranged to permit the flow of fluids through the drill pipe when an instrument housing is positioned therein, comprising: a sleeve for reception within the bore of the pipe, and having a cylindrical portion with longitudinal ribs formed thereon for engaging the bore of the pipe and maintain said cylindrical portion in a spaced position from said bore; a shoulder formed on said sleeve for engaging a seat in the pipe; key means extending from the wall of said cylindrical portion into its bore for engaging a portion of the instrument housing to orient the housing with respect to said sleeve; and means on said sleeve for receiving a member extending from the wall of the pipe for holding said sleeve against rotation relative to the pipe.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |