Abstract: A coiled tubing apparatus is described for use in wellbore operations. The apparatus includes a coiled tubing strand that may be deployed into a wellbore to convey a tool to a subterranean location. A signal cable extends through the coiled tubing strand to facilitate communication between a data acquisition unit at a surface location and the subterranean tool. Upper and lower detector elements are operably associated with the signal cable to detect forces applied to the signal cable at lower and upper ends of the signal cable. The operator may employ forces to adopt corrective measures to ensure the signal cable does not become damaged or loose communication with either the downhole tool or the data acquisition unit. Since the coiled tubing strand and the signal cable may experience elongation at different rates, forces are applied to the signal cable that could jeopardize the wellbore operation if not managed.

Abstract: Methods for installing a signal cable through a coiled tubing strand include installing a front end bullet at a leading end of the signal cable and dissolvable bullets at intermediate locations along the signal cable. A pushing fluid is injected into the coiled tubing strand to apply a drive force to both the front end bullet and the dissolvable bullets to thereby advance the signal cable through the coiled tubing strand. Once the front end bullet passes through the coiled tubing strand, the front end bullet may be removed, and a solvent fluid is injected to remove the dissolvable bullets inside coiled tubing strand. The dissolvable bullets permit the pushing fluid to greater drag forces to advance the signal cable, while reducing the friction generated between the signal cable and an inner wall of the coiled tubing strand that usually act in a direction opposite the drag forces.

Abstract: A system for determining characteristics of a fracture can include electromagnetic sensors and a pressure sensor. The electromagnetic sensors can be positioned in a wellbore having a perforation to determine an amount of flow traversing the perforation into a fracture zone. The electromagnetic sensors can include a first electromagnetic sensor positioned in a first segment of the wellbore that is closer than the perforation to a surface of the wellbore. The electromagnetic sensors can also include a second electromagnetic sensor that is positioned in a second segment of the wellbore that is farther than the perforation from the surface of the wellbore. The pressure sensor can be positioned in the wellbore for detecting a pressure wave generated by the flow. The pressure wave and the amount of the flow traversing the perforation can be used to determine a characteristic of a fracture in the fracture zone.

Abstract: A coiled tubing apparatus is described for use in wellbore operations. The apparatus includes a coiled tubing strand that may be deployed into a wellbore to convey a tool to a subterranean location. A signal cable extends through the coiled tubing strand to facilitate communication between a data acquisition unit at a surface location and the subterranean tool. Upper and lower detector elements are operably associated with the signal cable to detect forces applied to the signal cable at lower and upper ends of the signal cable. The operator may employ forces to adopt corrective measures to ensure the signal cable does not become damaged or loose communication with either the downhole tool or the data acquisition unit. Since the coiled tubing strand and the signal cable may experience elongation at different rates, forces are applied to the signal cable that could jeopardize the wellbore operation if not managed.

Abstract: A hydraulic cable injector includes a first stripper assembly positioned at a first end of the hydraulic cable injector to receive a cable and provide a lower seal. A first wye joint is coupled to the first stripper assembly, and a flow tube assembly is operatively coupled to the first wye joint. A second wye joint is coupled to the flow tube assembly, and a second stripper assembly is coupled to the second wye joint and proves an upper seal. A third stripper assembly is positioned at a second end of the hydraulic cable injector for injecting the cable into a tubing and providing a tubing seal. A separator interposes the second and third stripper assemblies and defines a central pathway to feed the cable into the third stripper assembly from the second stripper assembly.

Abstract: A hydraulic cable injector includes a first stripper assembly positioned at a first end of the hydraulic cable injector to receive a cable and provide a lower seal. A first wye joint is coupled to the first stripper assembly, and a flow tube assembly is operatively coupled to the first wye joint. A second wye joint is coupled to the flow tube assembly, and a second stripper assembly is coupled to the second wye joint and proves an upper seal. A third stripper assembly is positioned at a second end of the hydraulic cable injector for injecting the cable into a tubing and providing a tubing seal. A separator interposes the second and third stripper assemblies and defines a central pathway to feed the cable into the third stripper assembly from the second stripper assembly.