US3942824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well tool protector
Assignee: GUIDECO Corp
•
Filing: 1973-11-12
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Granted: 1976-03-09
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Expires: 1993-11-12
Abstract
Abstract A protector for well tools such as drill pipe tubing, and the like, which is positionable about a joint of a drill pipe or tubing and which is moved into pre-determined position on the box-half of a tool joint by the pin-half of the tool joint as it is moved into telescoped and threaded engagement with the box-half.
Inventors
- 👤 Donald E. Sable
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:26
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1042; Y; Y10; Y10S; Y10S285/00; Y10S285/908
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
179 words
A protector for a well tool joint formed of a pin-half on one section of an elongate well tool having an annular external shoulder and a reduced threaded end portion and a box-half on another elongate section of the well tool having a threaded bore for receiving the reduced threaded end portion and an external annular shoulder facing the external shoulder of the pin-half when said halves are connected, said protector including: a rigid single piece cylindrical member having an internal annular flange at one end; and internal resilient compression means in said cylindrical member extending longitudinally relative to said cylindrical member at least half the length thereof and compressible against said cylindrical member when said protector is positioned on one of said joint halves, said flange being positioned between and engageable with said external shoulders of said joint halves and rotatable relative to said joint halves when said protector is positioned on said one of said joint halves for limiting longitudinal movement of said protector relative to said joint halves and permitting rotation of said protector relative thereto.
Claim 2
Dependent Claim
179 words
A protector for a well tool joint formed of a pin-half on one section of an elongate well tool having an annular external shoulder and a reduced threaded end portion and a box-half on another elongate section of the well tool having a threaded bore for receiving the reduced threaded end portion and an external annular shoulder facing the external shoulder of the pin-half when said halves are connected, said protector including: a rigid single piece cylindrical member having an internal annular flange at one end; and internal resilient compression means in said cylindrical member extending longitudinally relative to said cylindrical member at least half the length thereof and compressible against said cylindrical member when said protector is positioned on one of said joint halves, said flange being positioned between and engageable with said external shoulders of said joint halves and rotatable relative to said joint halves when said protector is positioned on said one of said joint halves for limiting longitudinal movement of said protector relative to said joint halves and permitting rotation of said protector relative thereto.
Claim 3
Dependent Claim
19 words
The protector of claim 1, and resilient means on the exterior of said cylindrical member extending radially outwardly therefrom.
Claim 4
Dependent Claim
40 words
The protector of claim 1, wherein said compression means comprise a plurality of longitudinal circumferentially spaced compression members whose diametrically opposed inner surfaces are spaced apart a distance smaller than the external diameter of said one of said joint halves.
Claim 5
Dependent Claim
22 words
The protector of claim 3, wherein said spaced members have inwardly and longitudinally convergent surfaces at their ends remote from said flange.
Claim 6
Dependent Claim
31 words
The protector of claim 4, wherein said compression members are compressed between said cylindrical member and said one joint half when said protector is telescoped longitudinally over said one joint half.
Claim 7
Dependent Claim
18 words
The protector of claim 5, wherein said compression members have ends adjacent said flange spaced from said flange.
Claim 8
Dependent Claim
31 words
The protector of claim 3, wherein said compression members are compressed between said cylindrical member and said one joint half when said protector is telescoped longitudinally over said one joint half.
Claim 9
Dependent Claim
56 words
The protector of claim 1, wherein said compression means comprises a cylindrical expander of smaller internal diameter than the external diameter of said one of said joint halves; and resilient compression members between said cylindrical member and said expander, said expander being radially expanded when said protector is positioned on said one of said joint halves.
Claim 10
Dependent Claim
145 words
The protector of claim 1, wherein said compression means include an inner cylindrical member, said first mentioned cylindrical member and said inner member having respectively internal and external annular compression flanges; and a resilient substance between said members and said compression flanges, said inner member having an internal flange engageable with the external shoulder of said one of said joint halves to limit telescopical movement of said inner member on said one of said joint halves; said substance being compressed to cause said protector member to forcibly engage said one of said joint halves when telescopical movement of said inner member on said one of said joint halves is arrested and the flange of said first mentioned cylindrical member is engaged by the external shoulder of said other of said joint halves and moves said first mentioned cylindrical member longitudinally relative to said inner member.
Claim 11
Dependent Claim
30 words
The protector of claim 9, wherein said inner member is provided with a plurality of spaced apertures through which said resilient substance may be compressed against said one half joint.
Claim 12
Dependent Claim
32 words
The protector of claim 1 wherein said compression means permit rotation of said tool joint relative to said protector when force tending to hold said protector against rotation exceeds a predetermined value.
Claim 13
Dependent Claim
15 words
The protector of claim 1, and a tubular body extending outwardly of said cylindrical member.
Claim 14
Dependent Claim
14 words
The protector of claim 12, wherein said body is integral with said cylindrical member.
Claim 15
Dependent Claim
18 words
The protector of claim 7; wherein said compression members have ends adjacent said flange spaced from said flange.
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) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |