US3650338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary bit guide
Assignee: Individual
•
Filing: 1970-05-25
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Granted: 1972-03-21
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Expires: 1990-05-25
Abstract
Abstract A device for controlling the directional deviation of a well bore. An outer member is concentrically spaced around a mandrel which is connectable at opposite ends to form part of a drill string, the outer member having longitudinal ribs extending from its outer surface to frictionally engage the walls of the well bore and thereby restrict rotation of the outer member in the well bore. A first set of deformable pressure chambers which preferably comprise part of a rotary pump are located between the outer member and the mandrel. A second set of deformable pressure chambers, located between the outer member and the mandrel, communicate via fluid passageways with the first set of pressure chambers. A fulcrum means is located between and in contact with said outer member and said mandrel whereby when fluid is transferred from the first set of chambers to the second set of chambers thereby causing the second set of chambers to apply a force against the mandrel in a lateral direction, the mandrel can pivot relative to the outer member.
Inventors
- 👤 Branch M Mcneely Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:37
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/04; E21B7/06; E21B7/062
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
178 words
An apparatus for controlling the directional deviation of a well bore comprising a mandrel adapted to be made a part of a drill string having a bit attached thereto for rotation therewith in said bore, an outer member in surrounding spaced relation to said mandrel, means to maintain said outer member substantially stationary against rotation in said bore, means forming first and second sets of deformable pressure chambers located between said outer member and said mandrel, said first and second sets of chambers being axially displaced from each other, fulcrum means located between and in contact with said outer member and said mandrel whereby said mandrel can pivot relative to said outer member, and means for transferring fluid from said first set of pressure chambers to said second set of preSsure chambers, said second set of chambers being circumferentially positioned about said mandrel to apply a force to move said mandrel and accordingly said string in a predetermined lateral direction when fluid is transferred under pressure from said first set of chambers to said second set of chambers.
Claim 2
Independent Claim
178 words
An apparatus for controlling the directional deviation of a well bore comprising a mandrel adapted to be made a part of a drill string having a bit attached thereto for rotation therewith in said bore, an outer member in surrounding spaced relation to said mandrel, means to maintain said outer member substantially stationary against rotation in said bore, means forming first and second sets of deformable pressure chambers located between said outer member and said mandrel, said first and second sets of chambers being axially displaced from each other, fulcrum means located between and in contact with said outer member and said mandrel whereby said mandrel can pivot relative to said outer member, and means for transferring fluid from said first set of pressure chambers to said second set of preSsure chambers, said second set of chambers being circumferentially positioned about said mandrel to apply a force to move said mandrel and accordingly said string in a predetermined lateral direction when fluid is transferred under pressure from said first set of chambers to said second set of chambers.
Claim 3
Dependent Claim
36 words
The apparatus of claim 1 wherein said means to maintain said outer member stationary in said well bore comprises a plurality of circumferentially disposed longitudinally extending ribs attached to the outer surface of said outer member.
Claim 4
Dependent Claim
49 words
The apparatus of claim 1 wherein said means forming said first set of deformable pressure chambers comprises a resilient sleeve surrounding said mandrel, said resilient sleeve having a plurality of circumferentially disposed longitudinally extending recesses on the outer surface thereof, said longitudinal recesses being generally parallel to said mandrel.
Claim 5
Dependent Claim
49 words
The apparatus of claim 1 wherein said means forming said second set of said deformable pressure chambers comprises a resilient sleeve sealingly engaged with said outer member along circumferentially spaced and longitudinally extending positions thereby forming a plurality of longitudinal chambers between said outer member and said resilient sleeve.
Claim 6
Dependent Claim
14 words
The apparatus of claim 1 wherein said fulcrum means comprises a swivel bearing assembly.
Claim 7
Dependent Claim
28 words
The apparatus of claim 5 wherein said swivel bearing assembly comprises a rigid annular sleeve secured to said mandrel and a seating means mounted on said outer member.
Claim 8
Dependent Claim
36 words
The apparatus of claim 1 wherein said means for transferring fluid from said first set of pressure chambers to said second set of pressure chambers includes a plurality of longitudinally extending passageways in said outer member.
Claim 9
Dependent Claim
27 words
The apparatus of claim 1 wherein said means for transferring said fluid includes a rotary pump means of which said first set of chambers form a part.
Claim 10
Dependent Claim
21 words
The apparatus of claim 8 wherein said first set of pressure chambers comprise the rotating element in said rotary pump means.
Claim 11
Dependent Claim
30 words
The apparatus of claim 9 wherein said means for transferring said fluid includes means for transferring said fluid into a preselected chamber in said second set of deformable pressure chambers.
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) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |