Method for operating a submersible pump

Abstract

A single tractor unit is provided for pulling a tractor, in which the tractor itself drives a plurality of hydraulic motors which control a crane unit, a coiled tubing injection unit, and the pumps and motors associated with a liquid nitrogen system which is used for injecting gaseous hydrogen into a workover well with coiled tubing. In an alternative mode, the liquid nitrogen system is replaced with one or more nitrogen generators which gather nitrogen from the earth's atmosphere to be pumped through the coiled tubing into the well being treated. Alternatively, the gaseous nitrogen source is one or more tanks of compressed nitrogen gas. Coiled tubing is described which embeds one or more stainless steel tubes for transporting gas, liquid or other fluids therethrough and also includes the use of one or more cords which are used to assist in maintaining the coiled tubing as having a circular cross-section, with such cords either being electrical or non-electrical in nature.

28 . A method for operating a submersible pump in fluids located in an earth borehole, comprising: 
 injecting a length of coiled tubing from a first location at or above the earth's surface to a second location in said borehole, wherein said coiled tubing is substantially circular in cross-section, and has embedded therein, at least one tube for transporting fluids from said first location to said second location and/or for pumping fluid from said second location to said first location, wherein the lower end of said coiled tubing is connected to said pump; and    pumping fluid from said second location to said first location    
     
     
         29 . The method according to  claim 28 , wherein said at least one tube comprises a first tube and a second tube.  
     
     
         30 . The method according to  claim 28 , wherein said length of coiled tubing also has at least one electrical line embedded therein running from said first location to said second location.  
     
     
         31 . The method according to  claim 30 , wherein said at least one electrical line comprises a first pair of electrical lines.