Abstract: A method of hanging a cable within a coiled tubing string includes the steps of determining a length of coiled tubing required within a well having a wellhead; determining a length of a cable required within the coiled tubing, the cable having a structural component along the length of the cable sufficient to support the weight of the cable; cutting the tubing string and installing a hanger sub in the coiled tubing string toward the wellhead attachment section relative to the downhole end, the hanger sub comprising an inner shoulder that extends radially into the hanger sub and defines an opening; and attaching an outer shoulder to the cable and inserting the cable into the coiled tubing string until the outer shoulder of the cable engages the inner shoulder of the hanger sub such that the inner shoulder positions the cable below the outer shoulder.

Abstract: A method of hanging a cable within a coiled tubing string includes the steps of determining a length of coiled tubing required within a well having a wellhead; determining a length of a cable required within the coiled tubing, the cable having a structural component along the length of the cable sufficient to support the weight of the cable; cutting the tubing string and installing a hanger sub in the coiled tubing string toward, the wellhead attachment section relative to the downhole end, the hanger sub comprising an inner shoulder that extends radially into the hanger sub and defines an opening; and attaching an outer shoulder to the cable and inserting the cable into the coiled tubing string until the outer shoulder of the cable engages the inner shoulder of the hanger sub such that the inner shoulder positions the cable below the outer shoulder.

Abstract: An optical sensor apparatus illuminates nested optical cavities by a broadband light source, such as a tunable laser. A composite interference signal is obtained from light reflected from the nested optical cavities, partial interference spectra are recovered from the composite interference signal, cavity depths are measured based on the partial interference spectra, and electrical signals are provided based on the final measured cavity depths.

Abstract: A method of installing a coiled tubing string having a plurality of external assemblies includes injecting the coiled tubing string into a well with a coiled tubing injector, when a first external assembly on the coiled tubing string reaches the coiled tubing injector, transferring support of the coiled tubing from the coiled tubing injector to a coiled tubing snubber located below the coiled tubing injector, opening the coiled tubing injector to an extent sufficient to allow passage of the first external assembly thereby, and actuating the coiled tubing snubber to move the first external assembly past the coiled tubing injector. The first external assembly has an outside diameter that is larger than an outside diameter of the coiled tubing string.

Abstract: A fluid delivery system for an inverted electric submersible pump (ESP), where the ESP has a motor section positioned above a pump section in a production path of a hydrocarbon well. The system has a supply of fluid connected to the motor section of the ESP by a supply line and a positive displacement pump that pumps fluid through the supply line to the ESP. A valve is connected between the positive displacement pump and the ESP. The valve is in an open state when the positive displacement pump is pumping fluid. A bypass line is connected in parallel to the positive displacement pump and connected between the normally closed valve and the supply of fluid, the bypass line having a check valve that permits the flow of fluid from the supply of fluid to the ESP.

Abstract: A method of hanging a cable within a coiled tubing string includes the steps of determining a length of coiled tubing required within a well having a wellhead; determining a length of a cable required within the coiled tubing, the cable having a structural component along the length of the cable sufficient to support the weight of the cable; cutting the tubing string and installing a hanger sub in the coiled tubing string toward, the wellhead attachment section relative to the downhole end, the hanger sub comprising an inner shoulder that extends radially into the hanger sub and defines an opening; and attaching an outer shoulder to the cable and inserting the cable into the coiled tubing string until the outer shoulder of the cable engages the inner shoulder of the hanger sub such that the inner shoulder positions the cable below the outer shoulder.

Abstract: An optical sensor apparatus illuminates nested optical cavities by a broadband light source, such as a tunable laser. A composite interference signal is obtained from light reflected from the nested optical cavities, partial interference spectra are recovered from the composite interference signal, cavity depths are measured based on the partial interference spectra, and electrical signals are provided based on the final measured cavity depths.

Abstract: A method of servicing an electric submersible pump in a well with a positive wellhead pressure includes providing production tubing in the well casing, a coil tubing string within the production tubing having an electric submersible pump at a downhole end of the coil tubing string, and a pump-receiving housing above the injection port of the wellhead. With the injection port sealed and the pump-receiving housing opened, the electric submersible pump may be inserted or removed from the pump-receiving housing. With the pump-receiving housing closed and the injection port opened, the electric submersible pump may be moved to or from the production tubing in the well.

Abstract: A splice for splicing opposed ends of mineral insulated cable, where each mineral insulated cable has a jacket surrounding a conductor, and mineral insulation insulating the conductor from the jacket, where the mineral insulation is recessed from the end of each mineral insulated cable, such that a length of conductor is exposed. The splice has an insulating sleeve disposed over a portion of the exposed length of each conductor, the insulating sleeve being positioned immediately adjacent to the mineral insulation. A sealant seals the insulating sleeve to the mineral insulation. A connector electrically connects the conductors at a point between the respective insulating sleeves. A cover covers the ends of the mineral insulated cables.

Abstract: A method of servicing an electric submersible pump in a well with a positive wellhead pressure includes providing production tubing in the well casing, a coil tubing string within the production tubing having an electric submersible pump at a downhole end of the coil tubing string, and a pump-receiving housing above the injection port of the wellhead. With the injection port sealed and the pump-receiving housing opened, the electric submersible pump may be inserted or removed from the pump-receiving housing. With the pump-receiving housing closed and the injection port opened, the electric submersible pump may be moved to or from the production tubing in the well.

Abstract: An apparatus for measuring downhole pressure includes a plurality of conductors within a mineral insulated cable, a pressure sensor attached to at least two of the conductors, and a thermocouple embedded in the mineral insulated cable. The pressure sensor generates a signal that is dependent upon pressure. The thermocouple is rated for temperatures greater than 150° C. The thermocouple generates a signal that is dependent upon temperature.

Abstract: A method of preventing hydrogen darkening of optic fiber, which includes a step of providing a protective barrier of hydrogen free flowing gas around the optic fiber, such that the flowing gas sweeps away hydrogen.

Abstract: A product consisting of a plurality of thermocouple cables braided or wound and covered with protective armour, thereby forming a braided bundle. The product is used in accordance with a method involving a further step of inserting the braided bundle into a well.

Abstract: A method of preventing hydrogen darkening of optic fibre, which includes a step of providing a protective barrier of hydrogen free flowing gas around the optic fibre, such that the flowing gas sweeps away hydrogen.

Abstract: A product consisting of a plurality of thermocouple cables braided or wound and covered with protective armour, thereby forming a braided bundle. The product is used in accordance with a method involving a further step of inserting the braided bundle into a well.