Tubing-pulling systems

Abstract

It is an object of the invention to provide tubing-pulling system including: a hydraulic power unit including a power source and a hydraulic pump; a tubing-pulling unit; and a hydraulic hose adapted and configured to circulate hydraulic fluid pressurized by the hydraulic pump through the tubing-pulling unit. This object of the invention can have a variety of embodiments.

1 . A tubing-pulling system comprising:
 a hydraulic power unit comprising:
 a power source; and 
 a hydraulic pump; 
   a tubing-pulling unit; and   a hydraulic hose adapted and configured to circulate hydraulic fluid pressurized by the hydraulic pump through the tubing-pulling unit.   
     
     
         2 . The system of  claim 1 , wherein the power source is an internal combustion engine. 
     
     
         3 . The system of  claim 1 , wherein the power source is an electric motor. 
     
     
         4 . The system of  claim 1 , wherein the power source is mounted on a wheeled cart. 
     
     
         5 . The system of  claim 1 , wherein the tubing-pulling unit is removably couplable to the power source. 
     
     
         6 . The system of  claim 5 , wherein upon removable coupling of the tubing-pulling unit to the power source, a handle of the tubing-pulling unit is at least about 30″ from a base of a Wheel of the wheeled cart. 
     
     
         7 . The system of  claim 1 , wherein the hydraulic power unit further comprises:
 one or more foot pedals adapted and configured to control flow of hydraulic fluid to the tubing-pulling unit.   
     
     
         8 . The system of  claim 1 , wherein the tubing-pulling unit further comprises:
 at least one casing clamp adapted and configured press against a surface of a well casing.   
     
     
         9 . The system of  claim 8 , wherein the at least one casing clamp is adapted to press against an interior surface of the well casing. 
     
     
         10 . The system of  claim 9 , wherein the at least one casing clamp includes a light source. 
     
     
         11 . The system of  claim 10 , wherein the light source is adapted and configured to illuminate a pitless adapter within the well casing. 
     
     
         12 . The system of  claim 10 , wherein the light source is adapted and configured to illuminate at least four feet of the well casing. 
     
     
         13 . The system of  claim 10 , wherein the light source is a plurality of light-emitting diodes. 
     
     
         14 . The system of  claim 9 , wherein the at least one casing clamp has a curved outer surface. 
     
     
         15 . The system of  claim 1 , wherein the tubing-pulling unit further comprises:
 a plurality of wheels adapted and configured to grip a length of tubing and rotate to pull the length of tubing.   
     
     
         16 . The system of  claim 15 , wherein the plurality of wheels are airless wheels. 
     
     
         17 . The system of  claim 15 , wherein the plurality of wheels each define a single circumferential groove. 
     
     
         18 . The system of  claim 15 , wherein the plurality of wheels each define two circumferential grooves. 
     
     
         19 . The system of  claim 15 , wherein the tubing-pulling unit further comprises:
 one or more pistons adapted and configured to press the plurality of wheels against the length of tubing.   
     
     
         20 . The system of  claim 15 , wherein the tubing-pulling unit further comprises:
 one or more accumulators in communication with the pistons and adapted and configured to temporarily relieve excess pressure when a well component having a larger diameter than the length of tubing passes between the plurality of wheels.   
     
     
         21 . The system of  claim 15 , further comprising:
 a controller adapted and configured to control a rotational speed of the plurality of Wheels.   
     
     
         22 . The system of  claim 21 , wherein the controller is adapted and configured to control the rotational speed of the plurality of the wheels to be between about 1 RPM and 72 RPM. 
     
     
         23 . The system of  claim 1 , wherein the system is capable of generating at least 675 pounds of lifting force.