Driving device for driving drill pipes and method for operating such a driving device
a driving device and drill pipe technology, applied in drilling machines and methods, conveyors, belts/chains/gearrings, etc., can solve the problems of insufficient stable line voltage, large space required for electrically operated heating with the necessary heating performance, and inability to provide stable line voltage. , to achieve the effect of sufficient stability and convenient operation
Inactive Publication Date: 2016-01-14
BENTEC DRILLING & OILFIELD SYST
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Benefits of technology
The invention relates to a drive device, specifically a topdrive, for use in oil drilling operations. The technical effect of the invention is that it provides a more efficient way to heat the gearbox oil in the topdrive. The heating process only requires the operation of the hydraulic unit, which is easily operated even by an emergency power unit. Additionally, the heating can be done without needing any additional installation space, as the components and units used for heating are already included in the topdrive. The heat exchanger is located within the gearbox oil pan, and its dimensions do not require any modification to the pan. The invention also includes the use of a hydraulic fluid temperature sensor to automatically introduce the hydraulic fluid into the heat exchanger based on the temperature sensor reading, allowing for efficient heat transfer to the gearbox oil. A directional control valve is also included to decide which direction the hydraulic fluid should flow to, either to the pressure limiting valve or the heat exchanger.
Problems solved by technology
This type of line voltage and, in particular, stable line voltage is not always available at locations where drilling rigs—and along with these the topdrives included therein—are operated.
Regardless of this factor, a possible electrically-operated heating with the necessary heating performance requires a substantial amount of space.
Method used
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[0044]The diagram in 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 d...
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The invention relates to a so-called topdrive (16) in the form of a device to drive drill pipes and to a method for operating this drive, in which means are provided to heat the gearbox oil (46) used by the topdrive (16), which means can also be supplied by an emergency power unit and comprise a hydraulic unit (28) and a pressure limiting valve (40) of the topdrive (16), wherein hydraulic fluid (36) is circulated through the pressure limiting valve (40) to heat the gearbox oil (46) by the hydraulic unit (28), and the heat energy thus generated is transferred through a heat exchanger (48) through which the hydraulic fluid (36) flows to the gearbox oil (46).
Description
BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]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.[0003]2. Description of the Related Art[0004]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.[0005]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 temperat...
Claims
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IPC IPC(8): E21B3/02E21B7/00
CPCE21B7/00E21B3/02F16H57/0413E21B3/022
Inventor MOSS, JOHANNES
Owner BENTEC DRILLING & OILFIELD SYST