US3719237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubing tong hydraulic drive system
Assignee: Jackson Memorial Hospital
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Filing: 1971-06-21
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Granted: 1973-03-06
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Expires: 1991-06-21
Abstract
Abstract A power tong combination having a tong head for threaded pipe adapted to be driven in opposite pipe gripping and turning directions by a driving system which (1) drives only a first motor at a preselected torque and at high speed in the direction to connect threaded pipe: (2) jointly drives the first motor and a second motor to produce increased yet controlled torque to finally make up a pipe joint, and (3) jointly drives both motors to provide high torque to break out a pipe joint and then drives only the first motor to provide less torque and high speed to rapidly disconnect the pipe joint whereby the pipe gripping means remains engaged with pipe during the foregoing changes in speed and torque.
Inventors
- 👤 H Flick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:09
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/16
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
232 words
A power tong combination having rotatable pipe gripping means, a first hydraulic motor with means connected to rotate said pipe gripping means in either direction, a second hydraulic motor with clutch means cooperating to rotate said pipe gripping means in either direction only when said second motor is actuated, and fluid valviNg means connected to said first motor and said second motor and adapted for connection to a source of hydraulic fluid under pressure, said valving means comprising: a fist control valve means connected for conducting hydraulic fluid to drive said first motor in either direction, first hydraulic pressure control means cooperating with said first control valve means to control the pressure of hydraulic fluid conducted to rotate said first motor in a first direction and thereby regulate the torque produced by said first motor only in said first direction, a second control valve means connected to direct hydraulic fluid to drive said second motor jointly with said first motor to produce torque in addition to the torque produced by said first motor, second hydraulic pressure control means cooperating with said second control valve and said first hydraulic pressure control means to adjust said first hydraulic pressure control means when hydraulic pressure is directed to rotate said first motor and said second motor in said first direction and thereby regulate the cummulative torque produced by said motors only in said first direction.
Claim 2
Dependent Claim
232 words
A power tong combination having rotatable pipe gripping means, a first hydraulic motor with means connected to rotate said pipe gripping means in either direction, a second hydraulic motor with clutch means cooperating to rotate said pipe gripping means in either direction only when said second motor is actuated, and fluid valviNg means connected to said first motor and said second motor and adapted for connection to a source of hydraulic fluid under pressure, said valving means comprising: a fist control valve means connected for conducting hydraulic fluid to drive said first motor in either direction, first hydraulic pressure control means cooperating with said first control valve means to control the pressure of hydraulic fluid conducted to rotate said first motor in a first direction and thereby regulate the torque produced by said first motor only in said first direction, a second control valve means connected to direct hydraulic fluid to drive said second motor jointly with said first motor to produce torque in addition to the torque produced by said first motor, second hydraulic pressure control means cooperating with said second control valve and said first hydraulic pressure control means to adjust said first hydraulic pressure control means when hydraulic pressure is directed to rotate said first motor and said second motor in said first direction and thereby regulate the cummulative torque produced by said motors only in said first direction.
Claim 3
Dependent Claim
232 words
A power tong combination having rotatable pipe gripping means, a first hydraulic motor with means connected to rotate said pipe gripping means in either direction, a second hydraulic motor with clutch means cooperating to rotate said pipe gripping means in either direction only when said second motor is actuated, and fluid valviNg means connected to said first motor and said second motor and adapted for connection to a source of hydraulic fluid under pressure, said valving means comprising: a fist control valve means connected for conducting hydraulic fluid to drive said first motor in either direction, first hydraulic pressure control means cooperating with said first control valve means to control the pressure of hydraulic fluid conducted to rotate said first motor in a first direction and thereby regulate the torque produced by said first motor only in said first direction, a second control valve means connected to direct hydraulic fluid to drive said second motor jointly with said first motor to produce torque in addition to the torque produced by said first motor, second hydraulic pressure control means cooperating with said second control valve and said first hydraulic pressure control means to adjust said first hydraulic pressure control means when hydraulic pressure is directed to rotate said first motor and said second motor in said first direction and thereby regulate the cummulative torque produced by said motors only in said first direction.
Claim 4
Dependent Claim
232 words
A power tong combination having rotatable pipe gripping means, a first hydraulic motor with means connected to rotate said pipe gripping means in either direction, a second hydraulic motor with clutch means cooperating to rotate said pipe gripping means in either direction only when said second motor is actuated, and fluid valviNg means connected to said first motor and said second motor and adapted for connection to a source of hydraulic fluid under pressure, said valving means comprising: a fist control valve means connected for conducting hydraulic fluid to drive said first motor in either direction, first hydraulic pressure control means cooperating with said first control valve means to control the pressure of hydraulic fluid conducted to rotate said first motor in a first direction and thereby regulate the torque produced by said first motor only in said first direction, a second control valve means connected to direct hydraulic fluid to drive said second motor jointly with said first motor to produce torque in addition to the torque produced by said first motor, second hydraulic pressure control means cooperating with said second control valve and said first hydraulic pressure control means to adjust said first hydraulic pressure control means when hydraulic pressure is directed to rotate said first motor and said second motor in said first direction and thereby regulate the cummulative torque produced by said motors only in said first direction.
Claim 5
Dependent Claim
111 words
A power tong combination as defined in claim 1 and including mechanical linkage means cooperating with said first valve and said second valve to cause said second valve to be actuated after actuation of said first valve to direct hydraulic fluid to first drive said first motor then subsequently drive both said motors in said first direction and also to cause both said first valve and said second valve to be concurrently actuated then subsequently cause said second valve to be deactuated while said first valve continues to be actuated to direct hydraulic fluid to first drive both said motors then subsequently drive only said first motor in a second direction.
Claim 6
Dependent Claim
176 words
A power tong combination having rotatable pipe gripping means, a first hydraulic motor with means connected to rotate said pipe gripping means in either direction, a second hydraulic motor with clutch means cooperating to rotate said pipe gripping means in either direction only when said second motor is actuated, and fluid valving means connected to said first motor and said second motor and adapted for connection to a source of hydraulic fluid under pressure, said valving means comprising: a first control valve means connected for conducting hydraulic fluid to drive said first motor in either direction, first hydraulic pressure control means cooperating with said first control valve means to control the pressure of hydraulic fluid conducted to rotate said first motor in a first direction and thereby regulate the torque produced by said first motor only in said first direction, a second control valve means connected to direct hydraulic fluid to drive said second motor jointly with said first motor to produce torque in addition to the torque produced by said first motor in either direction.
Claim 7
Dependent Claim
176 words
A power tong combination having rotatable pipe gripping means, a first hydraulic motor with means connected to rotate said pipe gripping means in either direction, a second hydraulic motor with clutch means cooperating to rotate said pipe gripping means in either direction only when said second motor is actuated, and fluid valving means connected to said first motor and said second motor and adapted for connection to a source of hydraulic fluid under pressure, said valving means comprising: a first control valve means connected for conducting hydraulic fluid to drive said first motor in either direction, first hydraulic pressure control means cooperating with said first control valve means to control the pressure of hydraulic fluid conducted to rotate said first motor in a first direction and thereby regulate the torque produced by said first motor only in said first direction, a second control valve means connected to direct hydraulic fluid to drive said second motor jointly with said first motor to produce torque in addition to the torque produced by said first motor in either direction.
Claim 8
Dependent Claim
108 words
The power tong combination of claim 3 including mechanical linkage means cooperating with said first valve and said second valve to cause said second valve to be actuated after actuation of said first valve to direct hydraulic fluid to first drive said first motor then subsequently drive both said motors in said first direction and also to cause both said first valve and said second valve to be concurrently actuated then subsequently cause said second valve to be deactuated while said first valve continues to be actuated to direct hydraulic fluid to first drive both said motors then subsequently drive only said first motor in a second direction.
Claim 9
Dependent Claim
230 words
A power tong combination having rotatable pipe gripping means, a first hydraulic motor with means connected to rotate said pipe gripping means in either direction, a second hydraulic motor with clutch means cooperating to rotate said pipe gripping means in either direction only when said second motor is actuated, and fluid valving means connected to said first motor and said second motor and adapted for connection to a source of hydraulic fluid under pRessure, said valving means comprising: a first control valve means connected for conducting hydraulic fluid to drive said first motor in either direction, a second control valve means connected to direct hydraulic fluid to drive said second motor jointly with said first motor to produce torque in addition to the torque produced by said first motor, and mechanical linkage means cooperating with said first valve and said second valve to cause said second valve to be actuated after actuation of said first valve to direct hydraulic fluid to first drive said first motor then subsequently drive both said motors in said first direction and also to cause both said first valve and said second valve to be concurrently actuated then subsequently cause said second valve to be deactuated while said first valve continues to be actuated to direct hydraulic fluid to first drive both said motors then subsequently drive only said first motor in a second direction.
Claim 10
Dependent Claim
230 words
A power tong combination having rotatable pipe gripping means, a first hydraulic motor with means connected to rotate said pipe gripping means in either direction, a second hydraulic motor with clutch means cooperating to rotate said pipe gripping means in either direction only when said second motor is actuated, and fluid valving means connected to said first motor and said second motor and adapted for connection to a source of hydraulic fluid under pRessure, said valving means comprising: a first control valve means connected for conducting hydraulic fluid to drive said first motor in either direction, a second control valve means connected to direct hydraulic fluid to drive said second motor jointly with said first motor to produce torque in addition to the torque produced by said first motor, and mechanical linkage means cooperating with said first valve and said second valve to cause said second valve to be actuated after actuation of said first valve to direct hydraulic fluid to first drive said first motor then subsequently drive both said motors in said first direction and also to cause both said first valve and said second valve to be concurrently actuated then subsequently cause said second valve to be deactuated while said first valve continues to be actuated to direct hydraulic fluid to first drive both said motors then subsequently drive only said first motor in a second direction.
Claim 11
Dependent Claim
232 words
A hydraulic power system adapted to actuate a power tong having a reversibly rotatably pipe gripping means, comprising: a first reversible hydraulic motor adapted to be rotatably connected directly to drive said pipe gripping means, a second reversible hydraulic motor adapted to be rotatably connected to said pipe gripping means through an overrunning, self-energizing clutch means, and valving means connected to said first motor and said second motor and adapted for connection to a source of hydraulic fluid under pressure, said valving means including a first control valve means connected for conducting said hydraulic fluid to drive said first motor in either direction, first hydraulic pressure control means connected with said first control valve means and both said motors for controlling the pressure of said hydraulic fluid conducted to rotate said motors in a first direction only to regulate the torque produced thereby, a second control valve means connected for conducting said hydraulic fluid to drive said second motor in either direction jointly with said first motor to produce torque in addition to torque produced by said first motor, second hydraulic control means connected with said second control valve and said first pressure control means to adjust said first pressure control means when hydraulic fluid is directed by said valves for rotating both said motors in said first direction to regulate the cummulative torque produced by said motors in said first direction.
Claim 12
Dependent Claim
232 words
A hydraulic power system adapted to actuate a power tong having a reversibly rotatably pipe gripping means, comprising: a first reversible hydraulic motor adapted to be rotatably connected directly to drive said pipe gripping means, a second reversible hydraulic motor adapted to be rotatably connected to said pipe gripping means through an overrunning, self-energizing clutch means, and valving means connected to said first motor and said second motor and adapted for connection to a source of hydraulic fluid under pressure, said valving means including a first control valve means connected for conducting said hydraulic fluid to drive said first motor in either direction, first hydraulic pressure control means connected with said first control valve means and both said motors for controlling the pressure of said hydraulic fluid conducted to rotate said motors in a first direction only to regulate the torque produced thereby, a second control valve means connected for conducting said hydraulic fluid to drive said second motor in either direction jointly with said first motor to produce torque in addition to torque produced by said first motor, second hydraulic control means connected with said second control valve and said first pressure control means to adjust said first pressure control means when hydraulic fluid is directed by said valves for rotating both said motors in said first direction to regulate the cummulative torque produced by said motors in said first direction.
Claim 13
Dependent Claim
111 words
A hydraulic power system as defined in claim 6 and including mechanical linkage means cooperating with said first valve and said second valve to cause said second valve to be actuated after actuation of said first valve to direct hydraulic fluid to first drive said first motor then subsequently drive both said motors in said first direction and also to cause both said first valve and said second valve to be concurrently actuated then subsequently caused said second valve to be deactuated while said first valve continues to be actuated to direct hydraulic fluid to first drive both said motors then subsequently drive only said first motor in a second direction.
Claim 14
Dependent Claim
179 words
A hydraulic power system adapted to actuate a power tong having a reversibly rotatable pipe gripping means, comprising: a first reversible hydraulic motor adapted to be rotatably connected directly to drive said pipe gripping means, a second reversible hydraulic motor adapted to be rotatably connected to said pipe gripping means through an overrunning, self-energizing clutch means, and valving means connected to said first motor and said second motor and adapted for connection to a source of hydraulic fluid under pressure, said valving means including a first control valve means connected for conducting said hydraulic fluid to drive said first motor in either direction, first hydraulic pressure control means connected with said first control valve means and both said motors for controlling the pressure of said hydraulic fluid conducted to rotate said motors in a first direction only to regulate tHe torque produced thereby, a second control valve means connected for conducting said hydraulic fluid to drive said second motor in either direction jointly with said first motor to produce torque in addition to torque produced by said first motor.
Claim 15
Dependent Claim
179 words
A hydraulic power system adapted to actuate a power tong having a reversibly rotatable pipe gripping means, comprising: a first reversible hydraulic motor adapted to be rotatably connected directly to drive said pipe gripping means, a second reversible hydraulic motor adapted to be rotatably connected to said pipe gripping means through an overrunning, self-energizing clutch means, and valving means connected to said first motor and said second motor and adapted for connection to a source of hydraulic fluid under pressure, said valving means including a first control valve means connected for conducting said hydraulic fluid to drive said first motor in either direction, first hydraulic pressure control means connected with said first control valve means and both said motors for controlling the pressure of said hydraulic fluid conducted to rotate said motors in a first direction only to regulate tHe torque produced thereby, a second control valve means connected for conducting said hydraulic fluid to drive said second motor in either direction jointly with said first motor to produce torque in addition to torque produced by said first motor.
Claim 16
Dependent Claim
111 words
A hydraulic power system as defined in claim 8 and including mechanical linkage means cooperating with said first valve and said second valve to cause said second valve to be actuated after actuation of said first valve to direct hydraulic fluid to first drive said first motor then subsequently drive both said motors in said first direction and also to cause both said first valve and said second valve to be concurrently actuated then subsequently cause said second valve to be deactuated while said first valve continues to be actuated to direct hydraulic fluid to first drive both said motors then subsequently drive only said first motor in a second direction.
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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |