US3659655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feed controlling method and system
Assignee: Ingersoll Rand Co
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Filing: 1970-06-02
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Granted: 1972-05-02
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Expires: 1990-06-02
Abstract
Abstract A drilling head and drill string is fed, or the feed is restrained, by a hydraulic-fluid-actuated piston. Hydraulic lines supplying and evacuating hydraulic fluid to and from the piston have gauges connected thereto to signal pressure conditions, in psi, at the piston. Scales calibrated in pounds are mounted adjacent to the gauges to signal, per machine and drill string and their characteristics, as well as the characteristics of the material being drilled, a proper correspondence between actual bit weight and an optimum feed pressure of fluid pressure assistance or restraint. A valve controls the hydraulic fluid supply and evacuation, selectively, to effect a holding back of the drill string, when its dead weight less the system''s internal resistance would produce excessive bit weight, a pulling down of the drill string when its dead weight less the system''s internal resistance would yield inadequate bit weight or pressure monitoring on a level just to offset the system''s internal resistance when the drill string weight alone would produce the optimum bit weight (i.e., zero hold-back). The gauges and scale advise the operator of the operational feed status that he might determine the requirements for holding back or pulling down the drill string. Valving at a fluid reservoir insures maintenance of a constant compensating pressure to one side of the piston at all times. This constant pressure, when minimum hold-back pressure is applied, provides a low pressure pull-down force to counteract the system''s internal resistance so zero hold-back can exist. (The system''s internal resistance is the sum of various stationary mechanical frictions and the minimum obtainable holdback pressure all acting against the development of a down motion of the drill string.) The compensating pressure also prevents possible cavitation.
Inventors
- 👤 Laszlo Gyongyosi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:01
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/086
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
153 words
A feed controlling system, for drilling machines having drill rod depending from a drilling head which is supported by, and movable relative to, a drill tower, and given motor means, having opposed fluid-reacting surfaces, coupled to the drilling head for effecting movement thereof comprising: at least a first fluid supply and pump means for supplying pressured fluid to said motor means; a fluid reservoir; and means for selectively communicating said fluid supply and pump means and said reservoir, respectively, with said opposed surfaces to fluid-pressure one of said surfaces and to evacuate pressured fluid from another of said surfaces; wherein said latter means includes means for indicating the level of fluid pressure subsisting on at least one of said surfaces; and graduated scale means, mounted in adjacency to said pressure indicating means, having weight indicia thereon in graduations to signal, in cooperation with said indicating means, an optimum feed condition for the system.
Claim 2
Dependent Claim
153 words
A feed controlling system, for drilling machines having drill rod depending from a drilling head which is supported by, and movable relative to, a drill tower, and given motor means, having opposed fluid-reacting surfaces, coupled to the drilling head for effecting movement thereof comprising: at least a first fluid supply and pump means for supplying pressured fluid to said motor means; a fluid reservoir; and means for selectively communicating said fluid supply and pump means and said reservoir, respectively, with said opposed surfaces to fluid-pressure one of said surfaces and to evacuate pressured fluid from another of said surfaces; wherein said latter means includes means for indicating the level of fluid pressure subsisting on at least one of said surfaces; and graduated scale means, mounted in adjacency to said pressure indicating means, having weight indicia thereon in graduations to signal, in cooperation with said indicating means, an optimum feed condition for the system.
Claim 3
Dependent Claim
34 words
A feed controlling system, according to claim 1, further including: means throughconnected with said reservoir automatically operative always to maintain not less than a prescribed level of supply of pressured-fluid to said motor means.
Claim 4
Dependent Claim
31 words
A feed controlling system, according to claim 2, wherein: said communicating means including adjustable valve means for selectively controlling the communication of said fluid supply and pump means with said surfaces.
Claim 5
Dependent Claim
33 words
A feed controlling system, according to claim 1, further including: means throughconnecting with said reservoir automatically operative always to maintain not less than a prescribed level of fluid pressure to said motor means.
Claim 6
Dependent Claim
34 words
A feed controlling system, according to claim 4, wherein: said pressured fluid maintaining means includes valving means automatically responsive to a given fluid pressure level to halt evacuation of fluid from said motor means.
Claim 7
Dependent Claim
51 words
A feed controlling system, according to claim 5, wherein: said pressured fluid maintaining means further includes a second fluid supply and pump means, for supplying pressured fluid to ancillary motor means; and said valving means includes means for through-connecting said second fluid supply and pump means with said given motor means.
Claim 8
Dependent Claim
148 words
A feed controlling system, according to claim 4, wherein: said fluid communicating means includes a first conduit means, for conducting pressure fluid therethrough, having first and second terminal sections, said first terminal section thereof opening on one of said surfaces, and said second terminal section thereof opening on said first fluid supply and pump means; a second conduit means, for conducting pressured fluid therethrough, having both a given and an other terminal sectiOn, said given terminal section thereof opening on the other of said surfaces, and the other terminal section thereof opening on said reservoir; and valve means interposed between said first and second sections and also between said given and other terminal sections for accommodating fluid communication therebetween, respectively, for interrupting fluid communication therebetween, and for throughcommunicating said second terminal section with said given terminal section and said first terminal section with said other terminal section, respectively.
Claim 9
Dependent Claim
15 words
A feed controlling system, according to claim 7, wherein: said valve means is selectively operative.
Claim 10
Dependent Claim
29 words
A feed controlling system, according to claim 7, wherein: said indicating means comprise at least one fluid-pressure gauge in operative fluid-communication with at least one of said conduit means.
Claim 11
Dependent Claim
31 words
A feed controlling system, according to claim 1, wherein: said communicating means include adjustable valve means for selectively controlling the communication of said fluid supply and pump means with said surfaces.
Claim 12
Independent Claim
179 words
A method of feed control, for drilling machines having drill rod depending from a drilling head which is supported by, and movable relative to, a drill tower, and a given fluid-actuable motor means, having opposed fluid-reacting surfaces, coupled to the drilling head for effecting movement thereof, comprising the steps of: supplying a pressured fluid for actuation of said motor means; supplying a reservoir for receipt of fluid from said motor means; directing the supplied, pressured fluid, selectively, to one of said surfaces, and communicating another of said surfaces with the supplied reservoir; measuring the pressures of supplied fluid subsisting at said motor means; noting a correlation of the measured fluid pressures at said motor means, which effect perceptible movements of said drilling head and said drill rod, with the actual weights of said drilling head and drill rod of varying lengths; and setting out weight-representative indicia, on a scale, to be able to correlate such movement-effective measured fluid pressures, per drilling head and drill rod weights, to said scale for reference purposes in effecting optimum feed per actual weights.
Claim 13
Independent Claim
179 words
A method of feed control, for drilling machines having drill rod depending from a drilling head which is supported by, and movable relative to, a drill tower, and a given fluid-actuable motor means, having opposed fluid-reacting surfaces, coupled to the drilling head for effecting movement thereof, comprising the steps of: supplying a pressured fluid for actuation of said motor means; supplying a reservoir for receipt of fluid from said motor means; directing the supplied, pressured fluid, selectively, to one of said surfaces, and communicating another of said surfaces with the supplied reservoir; measuring the pressures of supplied fluid subsisting at said motor means; noting a correlation of the measured fluid pressures at said motor means, which effect perceptible movements of said drilling head and said drill rod, with the actual weights of said drilling head and drill rod of varying lengths; and setting out weight-representative indicia, on a scale, to be able to correlate such movement-effective measured fluid pressures, per drilling head and drill rod weights, to said scale for reference purposes in effecting optimum feed per actual weights.
Claim 14
Dependent Claim
38 words
A method of feed control for drilling machines, according to claim 11, wherein: said fluid supplying step includes the step of always maintaining not less than a prescribed level of supply of pressured fluid to said motor means.
Claim 15
Dependent Claim
106 words
A method of feed control for drilling machines, according to claim 11, further including the step of regulating the pressure of fluid supplied to said one surface, to limit the pressure to a value correlated to the actual weight of said drilling head and drill rod of a given length, when such actual weight alone will produce an optimum feed, to increase the pressure to a value which will produce an optimum feed when such actual weight is insufficient to do so, and to reduce the pressure to a value which will produce an optimum feed when such actual weight is too excessive to do so.
Claim 16
Dependent Claim
69 words
A method of feed control for drilling machines, according to claim 13, wherein: said pressures-measuring step comprises supplying a visual indication of pressure measurements; and further includes the step of juxtapositioning said scale with said visual indications so as to be able to determine the amount of pressure regulation effected and to be effected, for said drilling head and drill rods of varying lengths, to achieve said optimum feed.
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |