Baker Hughes Corporation

Phillip R Wilbourn

Don C Cox

Larry Verl Dalrymple

David H Neuroth

Thomson H Wallace

Charles C Collie

Leonard M Plummer

A reinforcing interface between the stator and its housing in a progressing cavity pump is created from ribs extending inwardly into the stator from the housing inner wall that can be longitudinally oriented or spirally oriented. Alternatively, the housing wall can have grooves into the inner wall that are made more bulbous further into the housing wall from the groove inlets so that when filled with stator material a long and continuous grip is obtained with either the wall groove embodiment or the internal rib embodiment.

Stator to housing lock in a progressing cavity pump

A method for manufacturing an electrical cable provides an electrical cable suitable for use in heating wells. An elastomeric jacket is extruded over insulated conductors. A stainless steel plate is rolled around the jacket to form a cylindrical coiled tubing having a seam. The seam is welded, then the tubing is swaged down to a lesser diameter to cause the tubing to frictionally grip the jacket. A recess maybe formed in the jacket adjacent the seam to avoid heat damage from the welding process.

Heater cable and method for manufacturing

A method for manufacturing an electrical cable provides an electrical cable suitable for use in heating wells. An elastomeric jacket is extruded over insulated conductors. A stainless steel plate is rolled around the jacket to form a cylindrical coiled tubing having a seam. The seam is welded, then the tubing is swaged down to a lesser diameter to cause the tubing to frictionally grip the jacket. A recess may be formed in the jacket adjacent the seam to avoid heat damage from the welding process.

A method of heating gas being produced in a well reduces condensate occurring in the well. A cable assembly having at least one insulated conductor is deployed into the well while the well is still live. Electrical power is applied to the conductor to cause heat to be generated. Gas is allowed up past the cable assembly and out the wellhead. The heat retards condensation, which creates frictional losses in the gas flow.

Live well heater cable

An electric submersible pump is provided having a pothead connector for use to connect a downhole cable to an electric motor of the submersible pump. The pothead connector has a tubular housing having an upper and a lower end. The downhole cable has electrical conductors which are separately covered by insulation layers. Lead sheaths separately extend around each of the insulation layers to encase each of the electrical conductors. The downhole cable extends through the rearward end and into the tubular housing, and then is electrical connected to the electric motor through the lower end of the tubular housing. An insulating block is provided in the lower end of the tubular housing for separating electrical conductors in alignment for mating with a connector mounted to the electric motor. A conductor pin is secured to the insulating block and to each of the conductors. The conductor pin abuts against an internal shoulder within a bore of the insulating block. An insulating sleeve, which slides over each conductor pin and into the bore of the insulating block, is threadedly connected to the insulating block urging the conductor pin against the internal shoulder. A lead based alloy solder seal and epoxy layers are disposed within the tubular housing, intermediately between the rearward and lower ends.

Conductor assembly for pothead connector

An electrical cable has helically attached bristles for supporting the electrical cable when pulled through a string of coiled tubing to connect to an electrical submersible pump. The electrical cable and helically attached bristles have a circumscribed diameter greater than the inner diameter of the coiled tubing. The bristles deflect in a direction opposite the direction of pulling the electrical cable so that they grip the wall of the coiled tubing. The bristles apply a resistive frictional force to the wall of the coiled tubing, thereby transferring the weight of the electrical cable to the coiled tubing.

Growing community of inventors

Claremore, OK, United States of America

Phillip R Wilbourn