Patent US3874196A successfully refreshed from Google Patents.
US3874196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary drive and joint breakout mechanism
Assignee: Gardner Denver Inc
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Filing: 1973-07-16
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Granted: 1975-04-01
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Expires: 1993-07-16
Abstract
Abstract A rotary table drive for a blasthole drill has a pair of roller elements pivotally mounted in a table bushing and engageable with cooperative longitudinal flat sided recesses formed on the exterior of a heavy walled cylindrical drill pipe to form the rotary drive connection with the drill stem. Multiple sections of the drill pipe may be used to make up a drill stem. A pulldown traverse frame mounted for longitudinal movement along the rig mast includes a rotary coupling member connected to the top end of a drill pipe section. The traverse frame also includes a drive transfer mechanism which is engageable with the rotary table for transferring the rotary drive effort from the table through the coupling member to the drill stem when the top end of a drill pipe section is passed downward through the table bushing. The drive transfer mechanism can be nonrotatably locked to provide for breakout of the threaded joint between a drill pipe section and the coupling member. A deck mounted wrench for engaging a toothed flange on the rotary table together with a power operated holding wrench is also used to breakout drill stem connections.
Inventors
- 👤 Robert W Hisey
- 👤 Larry E Halwas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:45
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/16; E21B19/167; E21B3/00; E21B3/02; E21B3/04; E21B7/00; E21B7/02; E21B7/021
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
174 words
A rotary drive arrangement for rotating a drill stem on an earth drilling rig comprising: a member disposed for rotation on said drilling rig and including an opening in which said drill stem is disposed for longitudinal movement with respect to said member; said drill stem comprising at least one elongated drill pipe section having a pair of opposed recesses in the outer wall surface of said drill pipe section, each recess forming a drive surface extending inward from the intersection of said recess with said outer wall surface generally toward the longitudinal axis of said drill pipe section, said drive surfaces extending longitudinally over a major portion of the length of said drill pipe section; and, a pair of drive rollers engageable with said drive surfaces for rotating said drill pipe section in response to the rotation of said member, said rollers being disposed on support members which are mounted on pivot means on said member so that said rollers may be pivotally moved into and out of engagement with said drive surfaces.
Claim 2
Dependent Claim
174 words
A rotary drive arrangement for rotating a drill stem on an earth drilling rig comprising: a member disposed for rotation on said drilling rig and including an opening in which said drill stem is disposed for longitudinal movement with respect to said member; said drill stem comprising at least one elongated drill pipe section having a pair of opposed recesses in the outer wall surface of said drill pipe section, each recess forming a drive surface extending inward from the intersection of said recess with said outer wall surface generally toward the longitudinal axis of said drill pipe section, said drive surfaces extending longitudinally over a major portion of the length of said drill pipe section; and, a pair of drive rollers engageable with said drive surfaces for rotating said drill pipe section in response to the rotation of said member, said rollers being disposed on support members which are mounted on pivot means on said member so that said rollers may be pivotally moved into and out of engagement with said drive surfaces.
Claim 3
Dependent Claim
209 words
A rotary drive arrangement for rotating a drill stem on an earth drilling rig comprising: a member disposed for rotation on said drilling rig and including an opening in which said drill stem is disposed for longitudinal movement with respect to said member; said drill stem comprising at least one elongated drill pipe section having a pair of opposed recesses in the outer wall surface of said drill pipe section, each recess forming a drive surface extending inward from the intersection of said recess with said outer wall surface generally toward the longitudinal axis of said drill pipe section, said drive surfaces being parallel and coplanar and extending longitudinally over a major portion of the length of said drill pipe section; and, a pair of drive rollers engageable with said drive surfaces for rotating said drill pipe section in response to the rotation of said member, said rollers including drive surfaces which are tapered with respect to the axis of rotation of said rollers and are engageable with the drive surfaces of said drill pipe section in such a way that surface portions of said recesses other than said drive surfaces are substantially prevented from engagement with said rollers when said rollers are rotatably driving said drill pipe section.
Claim 4
Dependent Claim
209 words
A rotary drive arrangement for rotating a drill stem on an earth drilling rig comprising: a member disposed for rotation on said drilling rig and including an opening in which said drill stem is disposed for longitudinal movement with respect to said member; said drill stem comprising at least one elongated drill pipe section having a pair of opposed recesses in the outer wall surface of said drill pipe section, each recess forming a drive surface extending inward from the intersection of said recess with said outer wall surface generally toward the longitudinal axis of said drill pipe section, said drive surfaces being parallel and coplanar and extending longitudinally over a major portion of the length of said drill pipe section; and, a pair of drive rollers engageable with said drive surfaces for rotating said drill pipe section in response to the rotation of said member, said rollers including drive surfaces which are tapered with respect to the axis of rotation of said rollers and are engageable with the drive surfaces of said drill pipe section in such a way that surface portions of said recesses other than said drive surfaces are substantially prevented from engagement with said rollers when said rollers are rotatably driving said drill pipe section.
Claim 5
Dependent Claim
165 words
A rotary drive arrangement for rotating a drill stem on an earth drilling rig comprising: a member disposed for rotation on said drilling rig and including an opening in which said drill stem is disposed for longitudinal movement with respect to said member; said drill stem comprising at least one elongated drill pipe section having recesses in the outer wall surface thereof, each recess forming a drive surface extending inward from the intersection of said recess with said outer wall surface generally toward the longitudinal axis of said drill pipe section, said drive surfaces extending longitudinally over a major portion of the length of said drill pipe section; and, drive means engageable with said drive surfaces for rotating said drill pipe section in response to the rotation of said member, said drive means being disposed on support members which are mounted on pivot means on said member so that said drive means may be pivotally moved into and out of engagement with said drive surfaces.
Claim 6
Dependent Claim
165 words
A rotary drive arrangement for rotating a drill stem on an earth drilling rig comprising: a member disposed for rotation on said drilling rig and including an opening in which said drill stem is disposed for longitudinal movement with respect to said member; said drill stem comprising at least one elongated drill pipe section having recesses in the outer wall surface thereof, each recess forming a drive surface extending inward from the intersection of said recess with said outer wall surface generally toward the longitudinal axis of said drill pipe section, said drive surfaces extending longitudinally over a major portion of the length of said drill pipe section; and, drive means engageable with said drive surfaces for rotating said drill pipe section in response to the rotation of said member, said drive means being disposed on support members which are mounted on pivot means on said member so that said drive means may be pivotally moved into and out of engagement with said drive surfaces.
Claim 7
Dependent Claim
87 words
The invention set forth in claim 3 wherein: said pivot means for mounting said support members on said member are disposed on said member further from the longitudinal axis of said drill pipe section than the point of engagement of said drive means with said drive surfaces on said drill pipe section so that in response to said drive means forcibly engaging asid drill pipe section a force couple is formed which tends to pivot said drive means toward said longitudinal axis of said drill pipe section.
Claim 8
Dependent Claim
30 words
The invention set forth in claim 3 together with: biasing means on said member engaged with said support members for biasing said drive means into said opening in said member.
Claim 9
Dependent Claim
35 words
The invention set forth in claim 5 together with: stop means on said support members for engaging cooperating stop means on said member for limiting the pivotal movement of said drive means into said opening.
Claim 10
Dependent Claim
84 words
The invention set forth in claim 1 wherein: said pivot means for mounting said support members on said member are disposed on said member further from the longitudinal axis of said drill pipe section than the point of engagement of said rollers with said drive surfaces on said drill pipe section so that in response to said rollers forcibly engaging said drill pipe section a force couple is formed which tends to pivot said rollers toward said longitudinal axis of said drill pipe section.
Claim 11
Dependent Claim
29 words
The invention set forth in claim 1 together with: biasing means on said member engaged with said support members for biasing said rollers into said opening in said member.
Claim 12
Dependent Claim
34 words
The invention set forth in claim 8 together with: stop means on said support members for engaging cooperating stop means on said member for limiting the pivotal movement of said rollers into said opening.
Claim 13
Dependent Claim
44 words
The invention set forth in claim 3 wherein: said rotary drive arrangement comprises a rotary table having a housing supporting a rotatable table member, and said member comprises a bushing removably fitted on said table member to be rotatably driven by said table member.
References Cited (Backward Citations)
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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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |