US3766992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for automatic regulation of the running speed of a drilling turbine through elastic accumulator means
Assignee: IFP Energies nouvelles
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Filing: 1971-12-02
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Granted: 1973-10-23
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Expires: 1991-12-02
Abstract
Abstract Device for automatic regulation of the running speed of a drilling turbine, adapted to compensate for a drop in the pressure power of the drilling fluid through the turbine by an opposite variation of the flow rate of said fluid through the turbine, comprising a tank of elastically expansible volume whereinto is applied the pressure of the drilling fluid, said tank being placed upstream with respect to the turbine, in the vicinity thereof and acting as a flow regulating means.
Inventors
- 👤 W Tiraspolsky
- 👤 M Flamand
- 👤 R Reynard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:52
CPC Classifications
F; F16; F16H; F16H39/00; F16H39/02; E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B21/00; E21B4/00; E21B4/02; F15; F15B; F15B1/00; F15B1/02; F15B1/04; F15B1/08; F15B1/10; F15B1/16; F15B2201/00; F15B2201/20; F15B2201/205; F15B2201/21; F15B2201/30; F15B2201/315; F15B2201/32; Y; Y10; Y10S; Y10S415/00; Y10S415/903
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
165 words
A device for the automatic regulation of the running speed of a hydraulic drilling turbine suspended from the lower end of a drill string, adapted to compensate for a variation of the motive pressure drop of the hydraulic drilling fluid through the turbine by an opposite variation of the flow rate of said fluid through the turbine, said device comprising a tank having at least one deformable wall, said tank defining a volume which varies as a function of the difference between the respective pressures applied on each side of said deformable wall, said tank being directly connected, at one end to the turbine inlet and, at the other end, to the lower end of the drill string, so that the hydraulic drilling fluid flows from the drill string to the turbine through said tank, the inner wall of which is subjected to the drilling fluid pressure, said tank being placed upstream the turbine, in the vicinity thereof and acting as a flow regulating capacity.
Claim 2
Independent Claim
165 words
A device for the automatic regulation of the running speed of a hydraulic drilling turbine suspended from the lower end of a drill string, adapted to compensate for a variation of the motive pressure drop of the hydraulic drilling fluid through the turbine by an opposite variation of the flow rate of said fluid through the turbine, said device comprising a tank having at least one deformable wall, said tank defining a volume which varies as a function of the difference between the respective pressures applied on each side of said deformable wall, said tank being directly connected, at one end to the turbine inlet and, at the other end, to the lower end of the drill string, so that the hydraulic drilling fluid flows from the drill string to the turbine through said tank, the inner wall of which is subjected to the drilling fluid pressure, said tank being placed upstream the turbine, in the vicinity thereof and acting as a flow regulating capacity.
Claim 3
Dependent Claim
66 words
A device according to claim 1, wherein said tank is formed of at least one deformable sleeve and in which the mechanical continuity of the drill string is performed by means of a rigid tube of an inner diameter greater than the external diameter of said sleeve and surrounding the latter, said rigid tube connecting the lower end of the drill string to the turbine inlet.
Claim 4
Dependent Claim
135 words
A device according to claim 2, wherein the wall of said rigid tube is provided with at least one orifice so as to apply the pressure prevailing in the annular space between the drill string and the wall of the bore hole to the external wall of said sleeve, the internal wall of which is subjected to the pressure of the drilling fluid prevailing inside the drill string, so that a pressure change, resulting in a corresponding change of the sleeve internal volume and producing a variation in the hydraulic fluid flow rate through the turbine, be accompanied with a change in the volume of said annular space, said volume change being of the same absolute value but opposite to the variation of the sleeve internal volume, and thus adapted to said flow rate change.
Claim 5
Dependent Claim
12 words
A device according to claim 2, wherein said deformable sleeve is elastic.
Claim 6
Dependent Claim
15 words
A device according to claim 4, wherein said deformable sleeve is made of reinforced elastomer.
Claim 7
Dependent Claim
26 words
A device according to claim 4, wherein said sleeve is fastened at both ends to said rigid tube achieving the mechanical continuity of the drill string.
Claim 8
Dependent Claim
29 words
A device according to claim 4, wherein at least one end of said sleeve may slide tightly along said rigid tube achieving the mechanical continuity of the drill string.
Claim 9
Dependent Claim
65 words
A device according to claim 2, wherein said tank is formed of at least two coaxial elastic sleeves so that the deformation of a first sleeve be limited by abutment of said sleeve against a second sleeve surrounding the first one, said abutment resulting in the transmission to said second sleeve of only a fraction of the drilling fluid pressure prevailing inside said first sleeve.
Claim 10
Dependent Claim
120 words
A device according to claim 2, wherein said sleeve is formed of at least one armature comprising elongated elements arranged in at least one helical winding, the turns of which are inclined with respect to the sleeve axis by an acute angle Alpha smaller than the equilibrium acute angle theta defined by the relationship tan2 theta 2, and of a sealing member arranged between the turns of said helical winding, said sleeve being secured at one of its ends to said rigid tube connecting the lower end of the drill string to the turbine inlet and further comprising elastic means connecting its other end to said rigid tube, said sleeve being deformable against the antagonistic action of said elastic means.
Claim 11
Dependent Claim
12 words
A device according to claim 9, wherein said elastic means are prestressed.
Claim 12
Dependent Claim
15 words
A device according to claim 9, wherein said elastic means consists of a helical spring.
Claim 13
Dependent Claim
31 words
A device according to claim 9, wherein said sealing means consists of an elastomer sheath in contact with at least one of the internal and external surfaces of said helical winding.
Claim 14
Dependent Claim
48 words
A device according to claim 9, wherein, in the absence of stress, applied to the helical winding, the turns of the helical winding are inclined with respect to the sleeve axis by an angle substantially equal to the acute angle Alpha defined by the relationship tan2 Alpha 2/7.
References Cited (Backward Citations)
US2734462A
Cited
US2838073A
Cited
US2958821A
Cited
US2958511A
Cited
US3394733A
Cited
US3370544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |