US4187061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary helical fluid motor with deformable sleeve for deep drilling tool
Assignee: Norton Christensen Inc
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Filing: 1978-04-27
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Granted: 1980-02-05
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Expires: 1998-04-27
Abstract
Abstract A progressing cavity fluid motor for driving a drill bit for deep drilling tools is described. Such a motor is mounted on a drill string and is powered by a fluid such as drilling mud. The pump includes a housing, a stator with female helical threads within the housing and a rotor with male helical threads mounted inside of the stator. The drill bit is connected to the rotor. In the present invention the rotor has a threaded surface which is formed of an elastically deformable sleeve supported by a carrier shaft. The sleeve is mounted on the carrier shaft in such a manner as to prevent rotation between the two so that the sleeve drives the shaft by positive engagement between these two elements. Means are arranged for introducing a pressure inside of the elastically deformable sleeve for expanding the sleeve radially outwardly. This pressure is greater than the fluid pressure existing in the working cavity between the facing surfaces of the male and female threads and preferably changes as a function of the working pressure in the drilling mud.
Inventors
- 👤 Rainer Jurgens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:39
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/0042; E; E21; E21B; E21B4/00; E21B4/02; F04C2/00; F04C2/08; F04C2/082; F04C2/084; F04C2/10; F04C2/107; F04C2/1071; F04C2/1073
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
165 words
In a progressing cavity fluid motor for driving a drill bit for deep drilling tools adapted to be mounted on a drill string and powered by a fluid such as drilling mud, said motor including a housing, a first driving surface with female helical threads mounted within and secured to the housing, a second driving surface with male threads inserted within the first driving surface, said surfaces being mounted for relative rotation, one of said surfaces being arranged to be connected to rotate a drill bit, the improvement wherein the second driving surface is formed of an elastically deformable sleeve supported by a carrier shaft, means for preventing rotary motion between said elastically deformable sleeve and the carrier shaft, and means for introducing a pressure medium inside of the elastically deformable sleeve to provide a pressure for expanding said sleeve radially outwardly, said pressure being greater than the fluid pressure existing in the working cavity between the facing surfaces of the male and female threads.
Claim 2
Dependent Claim
165 words
In a progressing cavity fluid motor for driving a drill bit for deep drilling tools adapted to be mounted on a drill string and powered by a fluid such as drilling mud, said motor including a housing, a first driving surface with female helical threads mounted within and secured to the housing, a second driving surface with male threads inserted within the first driving surface, said surfaces being mounted for relative rotation, one of said surfaces being arranged to be connected to rotate a drill bit, the improvement wherein the second driving surface is formed of an elastically deformable sleeve supported by a carrier shaft, means for preventing rotary motion between said elastically deformable sleeve and the carrier shaft, and means for introducing a pressure medium inside of the elastically deformable sleeve to provide a pressure for expanding said sleeve radially outwardly, said pressure being greater than the fluid pressure existing in the working cavity between the facing surfaces of the male and female threads.
Claim 3
Dependent Claim
145 words
In a progressing cavity fluid motor for driving a drill bit for deep drilling tools adapted to be mounted on a drill string and powered by a fluid such as drilling mud, said motor including a housing, a stator with female helical threads within the housing, a rotor with male helical threads inserted within the stator and mounted to rotate a drill bit, the improvement wherein the rotor has a threaded surface which is formed of an elastically deformable sleeve supported by a carrier shaft, means for preventing rotary movement between said elastically deformable sleeve and the carrier shaft, and means for introducing a pressure medium inside of the elastically deformable sleeve to provide a pressure for expanding said sleeve radially outwardly, said pressure being greater than the fluid pressure existing in the working cavity between the facing surfaces of the male and female threads.
Claim 4
Dependent Claim
145 words
In a progressing cavity fluid motor for driving a drill bit for deep drilling tools adapted to be mounted on a drill string and powered by a fluid such as drilling mud, said motor including a housing, a stator with female helical threads within the housing, a rotor with male helical threads inserted within the stator and mounted to rotate a drill bit, the improvement wherein the rotor has a threaded surface which is formed of an elastically deformable sleeve supported by a carrier shaft, means for preventing rotary movement between said elastically deformable sleeve and the carrier shaft, and means for introducing a pressure medium inside of the elastically deformable sleeve to provide a pressure for expanding said sleeve radially outwardly, said pressure being greater than the fluid pressure existing in the working cavity between the facing surfaces of the male and female threads.
Claim 5
Dependent Claim
30 words
A motor according to claim 2 wherein the means for preventing rotary movement between the sleeve and the carrier shaft comprises interengaging flutes and ribs on the sleeve and shaft.
Claim 6
Dependent Claim
28 words
A motor according to claim 2 wherein the means for preventing rotary movement between the sleeve and the carrier shaft comprises interengaging threads on the sleeve and shaft.
Claim 7
Dependent Claim
17 words
A motor according to claim 2 wherein the sleeve is reinforced by a reinforcing member bonded thereto.
Claim 8
Dependent Claim
16 words
A motor according to claim 5 wherein the reinforcing member is a tube supporting the sleeve.
Claim 9
Dependent Claim
15 words
A motor according to claim 5 wherein the reinforcing member is imbedded in the sleeve.
Claim 10
Dependent Claim
28 words
A motor according to claim 5 wherein the reinforcing member is imbedded in the sleeve and has a pattern essentially conforming to the helical surface of the sleeve.
Claim 11
Dependent Claim
27 words
A motor according to claim 2 wherein said pressure introducing means includes channel means communicating with an area at the high fluid pressure side of the motor.
Claim 12
Dependent Claim
39 words
A motor according to claim 9 wherein a restrictor is provided above the motor to create a fluid pressure drop at the entrance to the motor and the channel means communicates with the high pressure side of the restrictor.
Claim 13
Dependent Claim
22 words
A motor according to claim 9 wherein a plurality of radial channels distribute the pressure medium to the inside of the sleeve.
Claim 14
Dependent Claim
14 words
A motor according to claim 9 having a bypass valve in the channel means.
Claim 15
Dependent Claim
15 words
A motor according to claim 9 wherein the channel means includes a pressure multiplying means.
Claim 16
Dependent Claim
24 words
A motor according to claim 9 wherein the channel means includes movable means for transmitting high pressure to a fluid in the channel means.
Claim 17
Dependent Claim
16 words
A motor according to claim 2 wherein it is connected in series to another similar motor.
Claim 18
Dependent Claim
19 words
A multi-motor arrangement of claim 15 wherein each motor rotor is supported by means of a separate axial bearing.
Claim 19
Dependent Claim
17 words
A motor according to claim 16 in which the axial bearings are displaceable in a radial direction.
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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) | 1983-02-04 | 1983-08-06 | 1984-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-04 | 1987-08-06 | 1988-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-04 | 1991-08-06 | 1992-02-05 | $7700.00 | Window Closed / Lapsed |