Electrical power distribution method for a wireline tool string downhole

Abstract

The present invention relates to an electrical power distribution method for distributing power between two or more operating units of a wireline tool string downhole performing at least one operation. The electrical power distribution method comprises the steps of recording information ( 10 ) indicative of at least one operating condition ( 15 ) using one or more sensors comprised in the tool string, comparing the recorded information ( 20 ) to a set of predefined intervals ( 25 ) of the at least one operating condition ( 15 ), defining a power distribution ( 30 ) between the two or more operating units based on the comparison of the recorded information ( 20 ) and a predefined interval ( 25 ) of the at least one operating condition, classifying the set of predetermined intervals ( 27 ) in order to ensure a safe operation, such as classifying whether different operating units are classified as no risk, moderate risk or high risk, and controlling the electrical power distribution ( 40 ) of the operating units based on the definition of the power distribution and the classification of the set of predetermined intervals. Furthermore, the present invention relates to a wireline system for carrying out the method according to the invention.

1 . An electrical power distribution method for distributing power between two or more operating units of a wireline tool string downhole performing at least one operation, the method comprising the steps of:
 recording information indicative of at least one operating condition, using one or more sensors comprised in the tool string,   comparing the recorded information to a set of predefined intervals of the at least one operating condition,   defining a power distribution between the two or more operating units based on the comparison of the recorded information and the predefined interval of the at least one operating condition,   classifying the set of predefined intervals, in order to ensure a safe operation, such as classifying whether different predefined intervals are classified as no risk, moderate risk or high risk, and   controlling the electrical power distribution of the operating units based on the definition of the power distribution and the classification of the set of predefined intervals.   
     
     
         2 . An electrical power distribution method according to  claim 1 , wherein the step of comparing the recorded information comprises comparing the recorded information to at least one additional predefined interval. 
     
     
         3 . An electrical power distribution method according to  claim 1 , further comprising the step of:
 prioritising the operating conditions of the two or more operating units and basing the step of defining the appropriate electrical power distribution on the prioritisation of the operating conditions.   
     
     
         4 . An electrical power distribution method according to  claim 1 , wherein the steps of comparing of the recorded information, defining the appropriate electrical power distribution, and controlling the electrical power distribution of the wireline tool string are performed uphole at a surface. 
     
     
         5 . An electrical power distribution method according to  claim 1 , wherein the steps of comparing the recorded information, defining the appropriate electrical power distribution, and controlling the electrical power distribution are performed downhole in the wireline tool string. 
     
     
         6 . An electrical power distribution method according to  claim 1 , wherein the operating condition is a temperature, a pressure, a power, a vibration, a sound, a voltage, a current, a light, an angle, a velocity and/or a frequency. 
     
     
         7 . An electrical power distribution method according to  claim 1 , wherein the sensor is a temperature sensor, a pressure sensor, a wattmeter, an accelerometer, a microphone, a voltmeter, an ammeter, a light sensor, an angle measuring tool, a transducer, a laser and/or other sensors for measuring operating conditions downhole. 
     
     
         8 . An electrical power distribution method according to  claim 1 , wherein the operating unit is a downhole tractor, a milling tool, a cleaning tool, a stroker tool, a key tool, a capacitance tool, a laser tool, a laser, a computer, a sensor, processing unit, an electrical circuit and/or other operating units for downhole use. 
     
     
         9 . A wireline system for carrying out the method according to  claim 1 , wherein the wireline system comprises a power distribution unit, two or more operational units and two or more sensors for measuring operating conditions. 
     
     
         10 . A wireline system according to  claim 9 , wherein the operating unit is a downhole tractor, a milling tool, a cleaning tool, a stroker tool, a key tool, a capacitance tool, a laser tool, a laser, a computer, a sensor, processing unit and/or an electrical circuit. 
     
     
         11 . A wireline system according to  claim 9 , wherein the sensor is a temperature sensor, a pressure sensor, a wattmeter, an accelerometer, a microphone, a voltmeter, an ammeter, a light sensor, an angle measuring tool, a transducer and/or a laser.