Patent US5664606A successfully refreshed from Google Patents.
US5664606A
Expired / Lapsed
US
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Drill pipe having concave wrenching recesses
Assignee: Robbins TBM Inc
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Filing: 1995-06-07
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Granted: 1997-09-09
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Expires: 2015-06-07
Abstract
Abstract A drill pipe has a central axis and comprises a first end and a second end with a portion of the second end being substantially triangular in the lateral cross-section and having three faces. At least one concave wrench recess is located in each of the three faces of the substantially triangular portion of the second end. Each of the recesses has a surface with an axially extending center line. The center line is located a predetermined distance from the central axis, with this predetermined distance being less than the distance from the central axis of all other axial lines on the surface of the recess. Each of the recesses may be comprised of two adjoining planes having exterior surfaces, the cross-section of the two adjoining planes forming an angle of less than 180 degrees as measured between the exterior surfaces of the two adjoining planes. Alternatively, the recesses can be comprised of three adjoining planes. Finally, the recesses may be comprised of an arcuate segment.
Inventors
- 👤 Llewellan Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:17
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/042; E21B19/00; E21B19/16; E21B19/167
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
101 words
A drill pipe having a generally circular lateral cross-section and a central axis, and comprising: a first end; a second end, a portion of said second end being generally triangular in lateral cross-section and having three faces; and at least one concave wrench receiving recess in each of said three faces, each of said recesses having a surface with an axially extending center line thereon, said center line being located a predetermined distance from said central axis that is less than the distance from said central axis of the pipe to all other axial lines on said surface of said recess.
Claim 2
Dependent Claim
101 words
A drill pipe having a generally circular lateral cross-section and a central axis, and comprising: a first end; a second end, a portion of said second end being generally triangular in lateral cross-section and having three faces; and at least one concave wrench receiving recess in each of said three faces, each of said recesses having a surface with an axially extending center line thereon, said center line being located a predetermined distance from said central axis that is less than the distance from said central axis of the pipe to all other axial lines on said surface of said recess.
Claim 3
Dependent Claim
52 words
The drill pipe of claim 1 wherein said second end has a second portion being substantially triangular in lateral cross-section and having three faces, said second portion being axially spaced from said first portion, at least one concave wrench recess being present in each of said three faces of said second portion.
Claim 4
Dependent Claim
57 words
The drill pipe of claim 2 wherein each of said recesses has a surface with an axially extending center line thereon, said center line being located a predetermined distance from said central axis that is less than the distance from said central axis of the pipe to all other axial lines on said surface of said recess.
Claim 5
Dependent Claim
30 words
The drill pipe of claim 2 wherein said recesses on said portion of said second end are axially spaced from said recesses on said second portion of said second end.
Claim 6
Dependent Claim
36 words
The drill pipe of claim 1 wherein said second end has a portion being substantially triangular in lateral cross-section and has three faces with only one concave wrench recess located in each of said three faces.
Claim 7
Dependent Claim
57 words
The drill pipe of claim 5 wherein each of said recesses has a surface with an axially extending center line thereon, said center line being located a predetermined distance from said central axis that is less than the distance from said central axis of the pipe to all other axial lines on said surface of said recess.
Claim 8
Dependent Claim
52 words
The drill pipe of claim 5 wherein said second end has a second portion being substantially triangular in lateral cross-section and having three faces, said second portion being axially spaced from said first portion with only one concave wrench recess being present in each of said three faces of said second portion.
Claim 9
Dependent Claim
57 words
The drill pipe of claim 7 wherein each of said recesses has a surface with an axially extending center line thereon, said center line being located a predetermined distance from said central axis that is less than the distance from said central axis of the pipe to all other axial lines on said surface of said recess.
Claim 10
Dependent Claim
30 words
The drill pipe of claim 7 wherein said recesses on said portion of said second end are axially spaced from said recesses on said second portion of said first end.
Claim 11
Dependent Claim
46 words
The drill pipe of claim 1 wherein each of said recesses is comprised of two adjoining planes having exterior surfaces, the cross-section of said two adjoining planes forming an angle of less than 180 degrees as measured between said exterior surfaces of said two adjoining planes.
Claim 12
Dependent Claim
17 words
The drill pipe of claim 1 wherein each of said recesses is comprised of three adjoining planes.
Claim 13
Dependent Claim
17 words
The drill pipe of claim 1 wherein each of said recesses is comprised of an arcuate segment.
Claim 14
Dependent Claim
116 words
A drill pipe having a generally circular lateral cross-section and a central axis, and comprising: a first end; a second end, two axially spaced portions of said second end each being generally triangular in lateral cross-section and having three faces; and at least one concave wrench receiving recess in each of said three faces of each of said two axially spaced portions of said second end, each of said recesses having a surface with an axially extending center line thereon, said center line being located a predetermined distance from said central axis that is less than the distance from said central axis of the pipe to all other axial lines on said surface of said recess.
Claim 15
Dependent Claim
116 words
A drill pipe having a generally circular lateral cross-section and a central axis, and comprising: a first end; a second end, two axially spaced portions of said second end each being generally triangular in lateral cross-section and having three faces; and at least one concave wrench receiving recess in each of said three faces of each of said two axially spaced portions of said second end, each of said recesses having a surface with an axially extending center line thereon, said center line being located a predetermined distance from said central axis that is less than the distance from said central axis of the pipe to all other axial lines on said surface of said recess.
Claim 16
Dependent Claim
37 words
The drill pipe of claim 13 wherein said second end has a portion being substantially triangular in lateral cross-section and has three faces with only one concave wrench recess is located in each of said three faces.
Claim 17
Dependent Claim
57 words
The drill pipe of claim 14 wherein each of said recesses has a surface with an axially extending center line thereon, said center line being located a predetermined distance from said central axis that is less than the distance from said central axis of the pipe to all other axial lines on said surface of said recess.
Claim 18
Dependent Claim
52 words
The drill pipe of claim 14 wherein said second end has a second portion being substantially triangular in lateral cross-section and having three faces, said second portion being axially spaced from said first portion, and only one concave wrench recess being present in each of said three faces of said second portion.
Claim 19
Dependent Claim
57 words
The drill pipe of claim 16 wherein each of said recesses has a surface with an axially extending center line thereon, said center line being located a predetermined distance from said central axis that is less than the distance from said central axis of the pipe to all other axial lines on said surface of said recess.
Claim 20
Dependent Claim
30 words
The drill pipe of claim 16 wherein said recesses on said portion of said second end are axially spaced from said recesses on said second portion of said first end.
Claim 21
Dependent Claim
46 words
The drill pipe of claim 13 wherein each of said recesses is comprised of two adjoining planes having exterior surfaces, the cross-section of said two adjoining planes forming an angle of less than 180 degrees as measured between said exterior surfaces of said two adjoining planes.
Claim 22
Dependent Claim
17 words
The drill pipe of claim 13 wherein each of said recesses is comprised of three adjoining planes.
Claim 23
Dependent Claim
17 words
The drill pipe of claim 13 wherein each of said recesses is comprised of an arcuate segment.
Claim 24
Dependent Claim
101 words
A drill pipe having a generally circular lateral cross-section and a central axis, and comprising: a first end; a second end, a portion of said second end being generally triangular in lateral cross-section and having three faces; and at least one concave wrench receiving recess in each of said three faces, each of said recesses having two adjoining planes that intersect at an axially extending center line of said recess, each having an exterior surface, the cross-section of said two adjoining planes forming an angle of less than 180 degrees as measured between said exterior surfaces of said two adjoining planes.
Claim 25
Dependent Claim
101 words
A drill pipe having a generally circular lateral cross-section and a central axis, and comprising: a first end; a second end, a portion of said second end being generally triangular in lateral cross-section and having three faces; and at least one concave wrench receiving recess in each of said three faces, each of said recesses having two adjoining planes that intersect at an axially extending center line of said recess, each having an exterior surface, the cross-section of said two adjoining planes forming an angle of less than 180 degrees as measured between said exterior surfaces of said two adjoining planes.
Claim 26
Dependent Claim
52 words
The drill pipe of claim 22 wherein said second end has a second portion being substantially triangular in lateral cross-section and having three faces, said second portion being axially spaced from said first portion, at least one concave wrench recess being present in each of said three faces of said second portion.
Claim 27
Dependent Claim
46 words
The drill pipe of claim 23 wherein each of said recesses has two adjoining planes each having an exterior surface, the cross-section of said two adjoining planes forming an angle of less than 180 degrees as measured between said exterior surfaces of said two adjoining planes.
Claim 28
Dependent Claim
30 words
The drill pipe of claim 23 wherein said recesses on said portion of said second end are axially spaced from said recesses on said second portion of said second end.
Claim 29
Dependent Claim
38 words
The drill pipe of claim 22 wherein said second end has a portion being substantially triangular in lateral cross-section and has three faces, and at least one concave wrench recess is located in each of said three faces.
Claim 30
Dependent Claim
46 words
The drill pipe of claim 26 wherein each of said recesses has two adjoining planes each having an exterior surface, the cross-section of said two adjoining planes forming an angle of less than 180 degrees as measured between said exterior surfaces of said two adjoining planes.
Claim 31
Dependent Claim
52 words
The drill pipe of claim 26 wherein said second end has a second portion being substantially triangular in lateral cross-section and having three faces, said second portion being axially spaced from said first portion, at least one concave wrench recess being present in each of said three faces of said second portion.
Claim 32
Dependent Claim
46 words
The drill pipe of claim 28 wherein each of said recesses has two adjoining planes each having an exterior surface, the cross-section of said two adjoining planes forming an angle of less than 180 degrees as measured between said exterior surfaces of said two adjoining planes.
Claim 33
Dependent Claim
30 words
The drill pipe of claim 28 wherein said recesses on said portion of said second end are axially spaced from said recesses on said second portion of said first end.
Claim 34
Dependent Claim
17 words
The drill pipe of claim 22 wherein each of said recesses is comprised of three adjoining planes.
Claim 35
Dependent Claim
17 words
The drill pipe of claim 22 wherein each of said recesses is comprised of an arcuate segment.
Claim 36
Dependent Claim
116 words
A drill pipe having a generally circular lateral cross-section and a central axis, and comprising: a first end; a second end, two axially spaced portions of said second end each being generally triangular in lateral cross-section and having three faces; and at least one concave wrench receiving recess in each of said three faces of each of said two axially spaced portions of said second end, each of said recesses having two adjoining planes each having an exterior surface, the cross-section of said two adjoining planes that intersect at an axially extending center line of said recess, forming an angle of less than 180 degrees as measured between said exterior surfaces of said two adjoining planes.
Claim 37
Dependent Claim
116 words
A drill pipe having a generally circular lateral cross-section and a central axis, and comprising: a first end; a second end, two axially spaced portions of said second end each being generally triangular in lateral cross-section and having three faces; and at least one concave wrench receiving recess in each of said three faces of each of said two axially spaced portions of said second end, each of said recesses having two adjoining planes each having an exterior surface, the cross-section of said two adjoining planes that intersect at an axially extending center line of said recess, forming an angle of less than 180 degrees as measured between said exterior surfaces of said two adjoining planes.
Claim 38
Dependent Claim
38 words
The drill pipe of claim 33 wherein said second end has a portion being substantially triangular in lateral cross-section and has three faces, and at least one concave wrench recess is located in each of said three faces.
Claim 39
Dependent Claim
46 words
The drill pipe of claim 34 wherein each of said recesses has two adjoining planes each having an exterior surface, the cross-section of said two adjoining planes forming an angle of less than 180 degrees as measured between said exterior surfaces of said two adjoining planes.
Claim 40
Dependent Claim
52 words
The drill pipe of claim 34 wherein said second end has a second portion being substantially triangular in lateral cross-section and having three faces, said second portion being axially spaced from said first portion, at least one concave wrench recess being present in each of said three faces of said second portion.
Claim 41
Dependent Claim
46 words
The drill pipe of claim 36 wherein each of said recesses has two adjoining planes each having an exterior surface, the cross-section of said two adjoining planes forming an angle of less than 180 degrees as measured between said exterior surfaces of said two adjoining planes.
Claim 42
Dependent Claim
30 words
The drill pipe of claim 36 wherein said recesses on said portion of said second end are axially spaced from said recesses on said second portion of said first end.
Claim 43
Dependent Claim
17 words
The drill pipe of claim 33 wherein each of said recesses is comprised of three adjoining planes.
Claim 44
Dependent Claim
17 words
The drill pipe of claim 33 wherein each of said recesses is comprised of an arcuate segment.
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) | 2000-09-08 | 2001-03-10 | 2001-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-09-08 | 2005-03-10 | 2005-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-09-08 | 2009-03-10 | 2009-09-09 | $7700.00 | Window Closed / Lapsed |