US20160010392A1 - Driving device for driving drill pipes and method for operating such a driving device - Google Patents

Driving device for driving drill pipes and method for operating such a driving device Download PDF

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Publication number
US20160010392A1
US20160010392A1 US14/772,367 US201414772367A US2016010392A1 US 20160010392 A1 US20160010392 A1 US 20160010392A1 US 201414772367 A US201414772367 A US 201414772367A US 2016010392 A1 US2016010392 A1 US 2016010392A1
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United States
Prior art keywords
hydraulic fluid
gearbox oil
hydraulic
heat exchanger
topdrive
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Abandoned
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US14/772,367
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English (en)
Inventor
Johannes Moss
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Bentec Drilling and Oilfield Systems GmbH
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Bentec Drilling and Oilfield Systems GmbH
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Assigned to BENTEC GMBH DRILLING & OILFIELD SYSTEMS reassignment BENTEC GMBH DRILLING & OILFIELD SYSTEMS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MOSS, JOHANNES
Publication of US20160010392A1 publication Critical patent/US20160010392A1/en
Abandoned legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B3/00—Rotary drilling
    • E21B3/02—Surface drives for rotary drilling
    • E21B3/022—Top drives
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B3/00—Rotary drilling
    • E21B3/02—Surface drives for rotary drilling
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0412—Cooling or heating; Control of temperature
    • F16H57/0413—Controlled cooling or heating of lubricant; Temperature control therefor

Definitions

  • the following invention relates to a drive device, hereafter identified in abbreviated form in accordance with standard technical terminology as a topdrive, for driving drill pipes for drilling boreholes in hydrocarbon deposits, e.g., petroleum or natural gas, or for exploiting geothermal energy.
  • a drive device hereafter identified in abbreviated form in accordance with standard technical terminology as a topdrive, for driving drill pipes for drilling boreholes in hydrocarbon deposits, e.g., petroleum or natural gas, or for exploiting geothermal energy.
  • Topdrives of this type are well known per se and comprise a gearbox by which the torque of a drive motor, also included in the topdrive, is transferred to the drill pipes.
  • gearbox for topdrives One aspect of the gearbox for topdrives that is well known is the fact that this drive must only be operated above a minimum temperature which is determined in particular by the type of gearbox oil. This minimum temperature is in the range, for example, of minus 20° C. When temperatures are below this minimum temperature the gearbox must first be warmed up until it reaches a specified minimum operating temperature. This minimum operating temperature, for example, is in the range of minus 15° C. A cold start procedure is provided to warm up the gearbox in this way.
  • One object of the invention is therefore to propose a drive device of the type referenced above, that is, a topdrive in which it is possible to heat the gearbox oil by another approach.
  • Another object of the invention is to provide a method for operating this type of topdrive.
  • the topdrive comprises a hydraulic unit including a pan for hydraulic fluid, in particular, hydraulic oil, in which pan hydraulic fluid is present in a topdrive that is ready to operate or is already operating.
  • the topdrive furthermore by the known approach comprises a gearbox with a gearbox oil pan in which gearbox oil is located in a topdrive that is ready to operate or is already operating.
  • a gearbox oil temperature value for the temperature of the gearbox oil in the gearbox oil pan can be measured by a temperature sensor identified with specific reference as a gearbox oil temperature sensor.
  • the hydraulic fluid can be circulated by the hydraulic unit through a pressure limiting valve included in the topdrive as a function of the gearbox oil temperature value.
  • the gearbox oil temperature value is below a specified or specifiable limit, i.e., a corresponding processing and logical operation linking the gearbox oil temperature value and the limit effected by a circuit or software is provided for this purpose and is automatically able to detect that a cold start procedure must be initiated before the topdrive is put into operation.
  • the cold start procedure that can also be initiated automatically by detecting this situation, that is, as a function of the gearbox oil temperature value, consists of having the hydraulic fluid circulated by the hydraulic unit through the pressure limiting valve. The thermal dissipation loss generated by the flow passing through the pressure limiting valve results in the hydraulic fluid being heated.
  • the hydraulic fluid thus heated can be passed by the hydraulic unit through a heat exchanger installed in the gearbox oil pan as a function of temperature and/or time.
  • Introduction of the heated hydraulic fluid into the heat exchanger can be effected as a function of temperature and/or time.
  • this introduction can be effected whenever the hydraulic fluid has reached a specified temperature.
  • this introduction can be effected whenever the circulation of the hydraulic fluid through the pressure limiting valve has been effected at least for a specified or specifiable period of time and it can be assumed that the hydraulic fluid has undergone a rise in temperature necessary to heat the gearbox oil.
  • a provision is made whereby the hydraulic unit is activated automatically as a function of the gearbox oil temperature value to circulate the hydraulic fluid through the pressure limiting valve and whereby the hydraulic fluid is passed automatically as a function of temperature and/or time through a heat exchanger installed in the gearbox oil pan.
  • the above-referenced object of the invention is also achieved by a control device to control the operating method of the topdrive that performs the cold start procedure, which device functions according to the method described here and below, and for this purpose comprises means to implement the method.
  • the invention is preferably implemented in software; it can just as well, however, be implemented in hardware, or in both software and hardware.
  • the invention is thus also a computer program comprising program code instructions that can be executed by a computer, but is also a storage medium comprising this computer program—in other words a computer program product comprising program coding means, and finally also a control device, in the storage medium of which this computer program is loaded or can be loaded as means to implement the method.
  • the advantage of the invention is the fact that components and units are used to heat the gearbox oil that are already included in the topdrive—specifically, the hydraulic unit and the pressure limiting valve.
  • Another advantage is the fact that the action of heating the gearbox oil proposed here only requires the operation of the hydraulic unit.
  • the hydraulic unit can be very easily operated by an emergency power unit. Heating the gearbox oil as proposed here is thus independent of any line voltage which is sometimes not available or is not available at a sufficient level of stability. Since components and units are being used to heat the gearbox oil that are already in any case included in the topdrive, no additional installation space is required in the region of the topdrive.
  • the (additionally required) heat exchanger is located within the volumetric space of the gearbox oil pan, the geometry and outer dimensions of which do not require any modification, with the result that the heat exchanger located in the gearbox oil pan also does not require any additional installation space.
  • this device or drive comprises a temperature sensor that is identified for purposes of differentiation as a hydraulic fluid temperature sensor.
  • This hydraulic fluid temperature sensor enables a hydraulic fluid temperature value to be measured for a hydraulic fluid temperature in the pan of the hydraulic unit. The hydraulic fluid can then be passed by the hydraulic unit through the heat exchanger that is installed in the gearbox oil pan as determined by this hydraulic fluid temperature value.
  • An automatic and temperature-dependent introduction of the hydraulic fluid into the heat exchanger is thus possible based on the hydraulic fluid temperature value obtained by the hydraulic fluid temperature sensor.
  • the point of reaching a threshold value is monitored relative to the hydraulic fluid temperature value. Sufficient heating of the hydraulic fluid is recognized as soon as this threshold value has been reached.
  • the heated hydraulic fluid can now be passed to the heat exchanger, thereby allowing heat to be transferred there to the gearbox oil surrounding the heat exchanger.
  • a directional control valve is disposed between the hydraulic unit and the heat exchanger in the flow direction of the hydraulic fluid.
  • the directional control valve enables the hydraulic fluid to be automatically passed either to the pressure limiting valve or to the heat exchanger. It is possible to divert or divide the hydraulic fluid flow depending on the location of the directional control valve (upstream from the directional control valve or downstream from the directional control valve).
  • the directional control valve can be used to pass the hydraulic fluid either exclusively through the pressure limiting valve or exclusively through the heat exchanger.
  • a first hydraulic branch including the pressure limiting valve and a second hydraulic branch including the heat exchanger respectively connect to the heat exchanger.
  • the first hydraulic branch or the second hydraulic branch is active depending on the position of the directional control valve.
  • the directional control valve is located downstream from the pressure limiting valve, only the hydraulic branch through the pressure limiting valve is active when the directional control valve is closed. If the directional control valve is open, the hydraulic branch through the pressure limiting valve remains unaffected by this and continues to be active. The flow of hydraulic fluid divides, part of it following the first hydraulic branch through the pressure limiting valve and part of it following the second hydraulic branch with the open directional control valve and the heat exchanger that is connected thereto.
  • This type of directional control valve is thus both an efficient and simultaneously simple means of implementing a first hydraulic cycle in which a thermal dissipation loss can be generated by the pressure limiting valve located there, thereby heating the hydraulic fluid and simultaneously implementing a second hydraulic cycle in which a sufficiently heated hydraulic fluid can be passed to a heat exchanger in the gearbox oil pan in order to heat the gearbox oil there.
  • a flow control valve (throttle valve) is disposed in the flow direction of the hydraulic fluid between the hydraulic unit and the heat exchanger.
  • the volumetric flow to the heat exchanger that is provided by the hydraulic unit can be adjusted by the flow control valve.
  • the flow control valve thus enables adjustments to be made as to the level at which the hydraulic fluid should continue to generate heat by further circulating the hydraulic fluid, and as to the level at which heating of the gearbox oil should be effected by introducing the hydraulic fluid into the heat exchanger.
  • another pressure limiting valve can be provided in the flow direction of the hydraulic fluid between the hydraulic unit and the heat exchanger. This limits the effective pressure of the hydraulic fluid to the extent that the fluid can be passed without any risk to the heat exchanger.
  • One particularly capable form that has been found for the heat exchanger is a so-called finned tube since, as is well known, this tube has an even significantly greater surface area when compared with a tube rolled up in the shape of a coil and through which the hydraulic fluid flows, and thereby ensures an especially effective transfer of heat to the gearbox oil surrounding the heat exchanger/finned tube.
  • this drive device includes a gearbox oil temperature sensor to detect the gearbox oil temperature of the gearbox oil in the gearbox oil pan whereby the hydraulic unit is automatically activated to circulate the hydraulic fluid through the pressure limiting valve at a gearbox oil temperature value below a specified or specifiable temperature limit (for example, minus 20° C.). Circulation of the hydraulic fluid and thus heating of the hydraulic fluid are effected automatically, but also only as required based on this monitoring of the gearbox oil temperature value.
  • gearbox oil temperature value detected as the parameter for the gearbox oil temperature is below the temperature limit, a situation is recognized which requires a cold start procedure before starting up the topdrive.
  • Recognizing the requirement for this cold start procedure and initiating this cold start procedure by circulating the hydraulic fluid through the pressure limiting valve can be effected automatically by implementing appropriate processing and logical operation linking the gearbox oil temperature value and the temperature limit by means of a dedicated circuit or software.
  • automatic circulation of the hydraulic fluid through the pressure limiting valve is effected as a function of the gearbox oil temperature value.
  • Detection of the temperature of the hydraulic fluid in the form of a hydraulic fluid temperature value and the comparison thereof with a temperature threshold value is an efficient and simple means of performing an automatic and temperature-dependent introduction of hydraulic fluid into the heat exchanger that is installed in the gearbox oil pan.
  • One possible temperature for the temperature threshold value for example, is a temperature of +40° C.
  • Sufficient heating of the hydraulic fluid is detected when the hydraulic fluid temperature value reaches this temperature or the relevant temperature threshold value.
  • the heat energy absorbed from the hydraulic fluid can be transferred to the gearbox oil in order to heat it.
  • the hydraulic fluid flow is passed to the heat exchanger or at least also to the heat exchanger, and for this purpose a path is enabled for the hydraulic fluid to move from the hydraulic unit to the heat exchanger.
  • this drive device which includes a directional control valve disposed upstream from the pressure limiting valve between the hydraulic unit and the heat exchanger, whereby the hydraulic fluid flow is switched between a first path through the pressure limiting valve and a second path through the heat exchanger by automatically activating the directional control valve.
  • the directional control valve and the appropriate activation thereof is a simple and efficient means of opening a path for the hydraulic fluid from the hydraulic unit to the heat exchanger.
  • the directional control valve passes the hydraulic fluid flow exclusively either through the pressure limiting valve (to heat the hydraulic fluid) or to the heat exchanger (to transfer heat to the gearbox oil).
  • this drive device which unlike the above-described device includes a directional control valve between the hydraulic unit and the heat exchanger downstream from the pressure limiting valve instead of upstream from the pressure limiting valve, whereby the hydraulic fluid flow is switched by automatically activating the directional control valve between a first path through the pressure limiting valve and a second path that at least also includes the heat exchanger.
  • the directional control valve and the appropriate activation thereof is in this embodiment thus also a simple and efficient means of opening a path for the hydraulic fluid from the hydraulic unit to the heat exchanger.
  • the first path for the hydraulic fluid through the pressure limiting valve is always open when the directional control valve is located downstream from the pressure limiting valve. Activating the directional control valve to open the path for the hydraulic fluid through the heat exchanger thus results in the hydraulic fluid flow being divided between the first path (through the pressure limiting valve) and the second path (through the heat exchanger).
  • the advantage here is that the hydraulic fluid flowing along the first path continues to be heated as is the case with the exclusive circulation through the pressure limiting valve, with the result that the heat continuing to be absorbed from the hydraulic fluid is available continuously for transfer to the gearbox oil.
  • the advantage of the invention and embodiments thereof also entails specifically the fact that there is a reliable expectation of producing a transferable heat output of 2 kW to 3 kW due to the heating of the hydraulic fluid and the circulation thereof through the pressure limiting valve.
  • the gearbox oil of a topdrive that is offered by the applicant and identified as TD-500-HT can be heated from ⁇ 40° C. to approximately ⁇ 15° C. within about an hour.
  • This heating of the gearbox oil as part of a cold start procedure—or maintenance of gearbox oil heat— is only possible by means of the auxiliary drives that can be readily supplied with power by an emergency power unit, specifically here the hydraulic unit.
  • a “hydraulic gearbox oil heating” that essentially eliminates the need for additional functional units associated with the topdrive, specifically since the hydraulic unit and the pressure limiting valve by means of which the hydraulic fluid is circulated for heating purposes are already included in the topdrive.
  • Other means instead of a temperature sensor are possible for determining/detecting/calculating/estimating a temperature value—for example, a mathematical model that enables the relevant temperature value to be determined/calculated/and/or estimated based on other parameters, in particular, parameters detected at the topdrive, for example, based on an ambient temperature and a period of operation.
  • What then replaces the gearbox oil temperature sensor and/or hydraulic fluid temperature sensor is an appropriate means of determining/detecting/calculating/estimating—collectively referenced as “determining” without abandoning the wider general applicability of meaning—the gearbox oil temperature or the hydraulic fluid temperature.
  • FIG. 1 depicts a section of a drilling rig comprising a mast and a so-called topdrive of the type known per se which can move therein, such as that for employing a device for manipulating drill pipe elements;
  • FIG. 2 is a view of a topdrive including additional details, specifically a hydraulic unit and a gearbox housing;
  • FIG. 3 is a hydraulic diagram comprising a first and a second hydraulic cycle for hydraulic fluid conveyed by the hydraulic unit;
  • FIG. 4 is an enlarged view of the gearbox housing of the topdrive in FIG. 2 , comprising a heat exchanger that is installed therein and functions to transfer heat to gearbox oil located in the gearbox housing, which heat exchanger in turn has hydraulic fluid flowing through it that has been heated by the hydraulic unit; and
  • FIG. 5 is the hydraulic diagram of FIG. 3 together with a control device that is provided and intended to receive measurement data from and send control signals to individual units included in the hydraulic diagram.
  • FIG. 1 depicts as part of a drilling rig a mast 10 including a possible embodiment of an associated substructure 12 .
  • a so-called monkey board 14 is located here on mast 10 , which monkey board is provided in the manner known per se for the upright, that is, vertical mounting of drill pipe elements.
  • a so-called topdrive 16 is installed in the manner known per se in mast 10 , which topdrive is provided during operation to lower and lift the drill pipes (not shown; indicated only by broken lines) and to rotate the drill pipes so as to perform the drilling operation.
  • Topdrive 16 is thus a drive device to drive drill pipes when drilling boreholes in hydrocarbon deposits or for exploiting geothermal energy.
  • the term topdrive is a typically used technical term identifying this type of drive device. This term is used accordingly here and below.
  • the term topdrive is used here specifically also as the abbreviated form for the otherwise possible designation of this type of drive device in the form of drive device to drive drill pipes when drilling boreholes in hydrocarbon deposits or for the exploitation of geothermal energy.
  • Topdrive 16 is suspended in mast 10 on a roller block 18 .
  • Roller block 18 and a crown block 20 located in the area of a mast crown 20 function together like a pulley block.
  • a cable (not shown) runs from crown block 20 for vertical movement of topdrive 16 to a lifting apparatus provided in the area of the drill rig.
  • Topdrive 16 is held in mast 10 by guide rails 22 for vertical movement that can be actuated by the lifting apparatus.
  • topdrive 16 The diagram in FIG. 2 reveals an embodiment of a topdrive 16 including additional details.
  • a drive unit 24 in the form of an electric motor
  • a gearbox housing 26 including a gearbox (not shown) located therein that appropriately changes the rotational speed and the torque of drive unit 24 so that the drill pipes can be driven appropriately during the drilling action
  • a hydraulic unit 28 that, for example, supplies the operating pressure to hydraulically move so-called drill pipe bails 30 .
  • An oil sump 32 is created inside a bottom section of gearbox housing 26 . This is where portions of the gearbox oil used for the gearbox are located.
  • FIG. 3 is a schematic simplified view of the above-mentioned details of topdrive 16 ( FIG. 2 ) in the form of a hydraulic diagram.
  • the lower section of the diagram shows hydraulic unit 28 .
  • a pan 34 for hydraulic fluid 36 is included in hydraulic unit 28 , hydraulic fluid being located in the pan of topdrive 16 when the drive is ready to operate or in operation.
  • hydraulic unit 28 furthermore includes a hydraulic pump 38 provided to convey hydraulic fluid 36 together with a motor to operate the pump, a pressure limiting valve 40 , and a temperature sensor 42 .
  • Temperature sensor 42 measures a temperature of hydraulic fluid 36 (hydraulic fluid temperature). This temperature sensor is thus also identified as hydraulic fluid temperature sensor 42 .
  • Hydraulic fluid temperature sensor 42 supplies a hydraulic fluid temperature value T 1 as the hydraulic fluid temperature or as a parameter for the hydraulic fluid temperature.
  • FIG. 3 The hydraulic diagram of FIG. 3 in the region of hydraulic unit 28 illustrates how hydraulic fluid 36 can be circulated through pressure limiting valve 40 by hydraulic unit 28 —specifically by hydraulic pump 38 included therein. Hydraulic fluid 36 is conveyed from pan 34 and then discharged from the outlet of pressure limiting valve 40 into pan 34 . This creates a circuit for hydraulic fluid 36 .
  • This circuit is identified as the first circuit, or in abbreviated form as the first cycle, to differentiate it from another circuit that is described below.
  • pressure limiting valve 40 When hydraulic fluid 36 is circulated in the first cycle through pressure limiting valve 40 , heating of hydraulic fluid 36 is effected (hydraulic heating) by means of the thermal dissipation loss generated in pressure limiting valve 40 .
  • Pressure limiting valve 40 is part of hydraulic unit 28 .
  • Hydraulic unit 28 in turn is part of topdrive 16 . This justifies the designation of pressure limiting valve 40 and hydraulic unit 28 as parts of topdrive 16 , that is, as being comprised by topdrive 16 .
  • the top area of the diagram in FIG. 3 shows a gearbox oil pan 44 located in gearbox oil housing 26 of topdrive 16 .
  • gearbox oil 46 is located in gearbox oil pan 44 , the oil—just as for hydraulic fluid 36 —is shown only by the surface of a fluid level provided as an example.
  • Heat exchanger 48 is located in a lower section of gearbox oil pan 44 , that is, at the level of oil sump 32 ( FIG. 2 ).
  • a temperature sensor 50 is furthermore located in gearbox housing 26 .
  • This temperature sensor 50 measures a temperature of the gearbox oil (gearbox oil temperature) in the area of oil sump 32 . For purposes of differentiation this temperature sensor 50 is also identified as gearbox oil temperature sensor 50 . Gearbox oil temperature sensor 50 supplies a gearbox oil temperature value T 2 as a parameter for the gearbox oil temperature.
  • Heat exchanger 48 is part of a second hydraulic cycle starting from hydraulic unit 28 , where the first hydraulic cycle—as described above—is created inside hydraulic unit 28 and is active when hydraulic fluid 36 is circulated through pressure limiting valve 40 . Included in second hydraulic unit 28 are: a flow control valve 52 , pressure limiting valve 54 , directional control valve 56 , and another pressure limiting valve 58 provided to protect heat exchanger 48 .
  • FIG. 4 shows partially cutaway gearbox housing 26 , thereby providing a view of the interior thereof, and gearbox oil pan 44 provided there together with oil sump 32 in a lower section of gearbox oil pan 44 .
  • Heat exchanger 48 is disposed in gearbox oil pan 44 in the area of oil sump 32 , the heat exchanger being shown in the form of two tubular coils.
  • the two tubular coils are interconnected so that the above-mentioned second hydraulic cycle comprises the two tubular coils.
  • the coiled tubes or individual coiled tubes or more than two coiled tubes shown can be implemented as so-called finned tubes in order to enlarge the effective surface area.
  • hydraulic fluid 36 conveyed by hydraulic unit 28 flows into heat exchanger 48 at in-flow side 60 , then leaves heat exchanger 48 and thus gearbox housing 26 on a return side 62 .
  • FIG. 5 is a partial repeat of the illustration in FIG. 3 . Not all of the reference numerals are repeated so as not to diminish the clarity of FIG. 5 . For this reason reference is made to the illustration of FIG. 3 .
  • FIG. 5 otherwise is a schematically simplified control device 64 as an example of means to implement the method described here and below.
  • Control device 64 comprises, for example, in an approach known per se a processing unit, not shown, in the form of or analogous to a microprocessor and a storage medium, also not shown, that can be loaded with a control program that is executed when control device 64 is operating by the processing unit thereof
  • control device 64 The functionality implemented in the control program and the defined functionality of control device 64 , which can alternatively also be realized by conventional means, that is, in hardware, is summarized as follows:
  • Control device 64 measures at least gearbox oil temperature value T 2 supplied by gearbox oil temperature sensor 50 .
  • Hydraulic unit 28 is activated to circulate hydraulic fluid 36 through pressure limiting valve 40 as a function of gearbox oil temperature value T 2 .
  • the gearbox oil temperature correlation can be implemented here by comparing gearbox oil temperature value T 2 with a specified or specifiable temperature limit, and by activating hydraulic unit 28 to circulate hydraulic fluid 36 through pressure limiting valve 40 whenever gearbox oil temperature value T 2 is below the temperature limit.
  • the temperature limit can be implemented as the content of a memory location of control device 64 .
  • the temperature limit can thus be specified but at the same time can be adapted to the specific conditions, that is, for example, to the gearbox oil and the viscosity thereof
  • a temperature limit is minus 20° C.
  • control device 64 functions to have hydraulic fluid 36 passed through heat exchanger 48 installed in gearbox oil pan 44 as a function of temperature and/or time.
  • directional control valve 56 is activated which in the configuration shown in FIG. 3 and FIG. 5 in the open state opens the cycle and thus the path for hydraulic fluid 36 into heat exchanger 48 , while the first cycle through pressure limiting valve 40 remains active.
  • Flow control valve 52 functions here to divide the volumetric flow of hydraulic fluid 36 between the first and the second cycle.
  • control device 64 The above-described detection of measured values by control device 64 and the activation of individual units effected by control device 64 are illustrated by arrows in the diagram of FIG. 5 .
  • the paths of action thus shown are implemented in practice as wire connections through which the measured values can be received and control signals can be sent.
  • control device 64 effects a time-dependent introduction of hydraulic fluid 36 into heat exchanger 48
  • control device 64 includes a timer that is started with the start of circulation of hydraulic fluid 36 through pressure limiting valve 40 , and during the sequence generates a signal, on the basis of which control device 64 generates the signal to activate directional control valve 65 to open the second cycle for hydraulic fluid 36 .
  • the timer can be implemented by the well-known approach as a decrementing or incrementing counter.
  • the start and the target value of this counter can be specified as content of a memory location of control device 64 .
  • the relevant value used is thus an empirical value that can be adapted to the specific conditions.
  • control device 64 manages a plurality of these values from which a user selects a value appropriate to the given situation based on hydraulic fluid 36 is used, the delivery volume of hydraulic unit 28 , that is, for example, twenty liters per minute, and the pressure at which pressure limiting valve 40 limits/reduces the pressure of hydraulic fluid 36 , in other words, for example, 210 bar.
  • the values managed by control device 64 can then, for example, be organized in a multi-dimensional matrix, and an appropriate time value is selected from a specified value or selection of individual parameters. This approach achieves the goal of eliminating the need to measure the hydraulic fluid temperature, and hydraulic fluid temperature sensor 42 that is otherwise provided to measure the hydraulic fluid temperature can accordingly be eliminated.
  • control device 64 measures hydraulic fluid temperature value T 1 supplied by hydraulic fluid temperature sensor 42 at least when hydraulic fluid 36 is circulated through pressure limiting valve 40 , then compares this value with a specified or specifiable temperature threshold value.
  • the temperature threshold value is implemented, in particular, as content of a memory location of control device 64 .
  • the temperature threshold value is thus specifiable, but can also be adapted to relevant conditions, such as, for example, the volumetric conditions of hydraulic fluid 36 and gearbox oil 46 , and/or as a parameter for the transfer of heat at heat exchanger 48 to gearbox oil 46 .
  • One possible threshold value for example, is a value of +40° C. Whenever hydraulic fluid temperature value T 1 reaches or exceeds the relevant temperature threshold value, hydraulic fluid 36 that is then sufficiently heated is passed through heat exchanger 48 installed in gearbox oil pan 44 . To this end control device 64 activates directional control valve 56 , as described above.
  • This type of hydraulic gearbox oil heating remains active until at least one specified minimum operating temperature has been reached for gearbox oil 46 .
  • control device 64 monitors gearbox oil temperature value T 2 continuously or at regular intervals following the initial activation of circulating hydraulic fluid 36 through pressure limiting valve 40 . Once gearbox oil temperature value T 2 has reached or exceeded the specified minimum operating temperature of gearbox oil 46 , the hydraulic gearbox oil heating can be deactivated. The hydraulic gearbox oil heating again becomes active automatically under the control of control device 64 if gearbox oil temperature value T 2 falls below the specified minimum operating temperature, or the at the latest whenever gearbox oil temperature value T 2 falls below the minimum temperature.
  • the hydraulic gearbox oil heating that is, the method for the operating topdrive 16 described here can be started automatically whereby control device 64 continuously monitors gearbox oil temperature value T 2 and the hydraulic gearbox oil heating is activated if the minimum operating temperature or the minimum temperature at least falls below a given level. Activation of the hydraulic gearbox oil heating can also be effected by an approach wherein gearbox oil temperature value T 2 is evaluated as described above in connection with a manual or automatic activation of topdrive 16 , and the hydraulic gearbox oil heating is activated as necessary. Activation of topdrive 16 is then delayed or prevented by control device 64 until at least the minimum operating temperature has been reached.
  • Heating of gearbox oil 46 can also be effected using other heat sources independently of the above-described hydraulic gearbox oil heating.
  • Gearbox oil 46 and/or hydraulic fluid 36 can then function as a heat-sink for heat generated at other locations.
  • a switchable heat exchanger or separate heat exchanger can be provided for this purpose in gearbox oil pan 44 and/or pan 34 for hydraulic fluid 36 , hot steam being introduced, for example, to dissipate heat from an external heat source.
  • topdrive 16 is described in the form of a device to drive drill pipes, and a method is described to operate the drive in which means are provided to heat gearbox oil 46 used by topdrive 16 , which means can be supplied by an emergency power unit, and comprise hydraulic unit 28 and pressure limiting valve 40 of topdrive 16 , wherein hydraulic fluid 36 is circulated by hydraulic unit 28 through pressure limiting valve 40 to heat gearbox oil 46 , and the heat energy thus generated is transferred to gearbox oil 46 through heat exchanger 48 through which hydraulic fluid 36 flows.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
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  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Fluid-Pressure Circuits (AREA)
  • General Details Of Gearings (AREA)
  • Earth Drilling (AREA)
  • Drilling And Boring (AREA)
US14/772,367 2013-03-05 2014-03-03 Driving device for driving drill pipes and method for operating such a driving device Abandoned US20160010392A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102013203756.2A DE102013203756A1 (de) 2013-03-05 2013-03-05 Antriebsvorrichtung zum Antrieb von Bohrgestänge und Verfahren zum Betrieb einer solchen Antriebsvorrichtung
DE102013203756.2 2013-03-05
PCT/EP2014/054020 WO2014135475A2 (de) 2013-03-05 2014-03-03 Antriebsvorrichtung zum Antrieb von Bohrgestänge und Verfahren zum Betrieb einer solchen Antriebsvorrichtung

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EP (1) EP2880240B1 (pl)
DE (1) DE102013203756A1 (pl)
EA (1) EA029121B1 (pl)
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DE102013203756A1 (de) 2014-09-11
EP2880240B1 (de) 2020-03-04
PL2880240T3 (pl) 2020-09-21
WO2014135475A2 (de) 2014-09-12
WO2014135475A3 (de) 2014-12-31

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