Hydraulic cable injector and method for cable deployment

A cable injector system, comprising:

• a cable;
• a hydraulic cable injector having a first end and a second end and including:
• a first stripper assembly positioned at the first end to receive the cable and provide a lower seal for the hydraulic cable injector at the first end;
• a first wye joint coupled to the first stripper assembly;
• a flow tube assembly operatively coupled to the first wye joint and having a flow tube that receives the cable after the cable extends through the first wye joint;
• a second wye joint coupled to the flow tube assembly;
• a second stripper assembly coupled to the second wye joint and providing an upper seal for the hydraulic cable injector;
• a third stripper assembly positioned at the second end and providing a tubing seal;
• and
• a separator interposing the second and third stripper assemblies and defining a central pathway that feeds the cable into the third stripper assembly from the second stripper assembly;
• a tubing coupled to the second end of the hydraulic cable injector to receive the cable from the third stripper assembly;
• a first fluid circuit for circulating a first fluid through the flow tube, wherein the lower and upper seals prevent the first fluid from migrating past the first and second stripper assemblies, respectively;
• and
• a second fluid circuit for circulating a second fluid through the tubing, wherein the tubing seal prevents the second fluid from migrating past the third stripper assembly and commingling with the first fluid.

A method, comprising:

• introducing a cable into a first end of a hydraulic cable injector, the hydraulic cable injector having a first stripper assembly positioned at the first end to receive the cable, a first wye joint coupled to the first stripper assembly, a flow tube assembly operatively coupled to the first wye joint, and a second wye joint coupled to the flow tube assembly, wherein the flow tube assembly has a flow tube that receives the cable after the cable extends through the first wye joint;
• circulating a first fluid through the flow tube via a first fluid circuit;
• preventing the first fluid from migrating past the first stripper assembly with a lower seal generated by the first stripper assembly at the first end;
• preventing the first fluid from migrating past the second stripper assembly with an upper seal generated by a second stripper assembly coupled to the second wye joint;
• injecting the cable into a tubing coupled to a second end of the hydraulic cable injector, the hydraulic cable injector having a third stripper assembly positioned at the second end;
• circulating a second fluid through the tubing via a second fluid circuit;
• and
• preventing the second fluid from migrating past the third stripper assembly and commingling with the first fluid with a tubing seal generated by the third stripper assembly.