Patent US3598187A successfully refreshed from Google Patents.
US3598187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbodrill
Assignee: Entreprise de Recherches et dActivites Petrolieres SA
•
Filing: 1970-05-07
•
Granted: 1971-08-10
•
Expires: 1990-05-07
Abstract
Abstract A turbodrill in which the hydraulic power unit consists of a rotor which is centered within a cylindrical stator by an axial thrust bearing, the forces exerted on said axial thrust bearing being balanced irrespective of the nature of the formation by virtue of two systems of vanes separated by a baffle for reversing the direction of flow of the driving fluid. Since the entire quantity of fluid passes successively through the two sets of vanes in opposite directions, the axial thrust forces are balanced on the thrust bearing which centers the rotor irrespective of the variations in loss of load on the drilling head.
Inventors
- 👤 Jean Mothre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:20
CPC Classifications
E; E21; E21B; E21B4/00; E21B4/02; Y; Y10; Y10S; Y10S415/00; Y10S415/903
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
A turbodrill driven by the drilling fluid itself and comprising a cylindrical stator, a rotor within the interior of said stator, an axial thrust bearing for centering said rotor within the stator, two sets of stationary vanes carried by the stator, two sets of moving vanes carried by the rotor and each engaged within one of the sets of vanes of the stator, a baffle for reversing the direction of flow of the fluid between the two sets of vanes and for guiding the flow of the total Quantity of fluid successively through the two sets of vanes and a removable drilling head rotatably coupled only to the rotor and traversed by the fluid which has already passed through said two sets of vanes.
Claim 2
Dependent Claim
124 words
A turbodrill driven by the drilling fluid itself and comprising a cylindrical stator, a rotor within the interior of said stator, an axial thrust bearing for centering said rotor within the stator, two sets of stationary vanes carried by the stator, two sets of moving vanes carried by the rotor and each engaged within one of the sets of vanes of the stator, a baffle for reversing the direction of flow of the fluid between the two sets of vanes and for guiding the flow of the total Quantity of fluid successively through the two sets of vanes and a removable drilling head rotatably coupled only to the rotor and traversed by the fluid which has already passed through said two sets of vanes.
Claim 3
Dependent Claim
32 words
A turbodrill according to claim 1, wherein the number of vanes of each set is such that the resultant axial thrust of the power unit on the axial thrust bearing is zero.
Claim 4
Dependent Claim
43 words
A turbodrill according to claim 1 wherein the first set of vanes is fixed between the rotor and a sleeve which is coaxial with the stator and which defines a U-shaped passageway for the flow of fluid between said rotor and said stator.
Claim 5
Dependent Claim
43 words
A turbodrill according to claim 3, wherein the rotor is pierced by an axial duct for the admission of the fluid and by lateral outlets which are curved in the direction of the first set of vanes or specifically of the U-shaped passageway.
Claim 6
Dependent Claim
25 words
A turbodrill according to claim 1, wherein the space between the sleeve and the stator is adapted to communicate with the second set of vanes.
Claim 7
Dependent Claim
43 words
A turbodrill according to claim 1, wherein the drilling head comprises a rotary shaft having an extension in the form of a splined endpiece disposed in interengaged relation with longitudinal grooves of a recess which is bored in the extremity of the rotor.
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |