Integrated ESP Tubing with Embedded Cable for Oil Production
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional oil production methods using submersible pumps and steel pipes face challenges such as difficult cable deployment, high labor costs, and tubing damage due to cable shifting and low space utilization between the coiled tubing and casing.
Innovation Solution
A novel tubing design featuring an inner pipe wrapped with a steel belt, multiple power and grounding conductors with insulating layers, and a protective steel wire mesh, along with a method for extruding and coiling the tubing to ensure stability and safety, combining the tubing and cabling for improved efficiency and safety in oil production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cable is fixed on coiled tubing during deployment, then power transmission to the submersible pump is enabled, but the cable shifts during operation causing tubing damage and reduced space utilization
Solution Approach 1:
The patent combines the cable and tubing into a single integrated structure where the cable is embedded within the tubing wall rather than being separately fixed on the tubing. This merging eliminates the relative motion between cable and tubing that causes shifting and damage, while maintaining power transmission functionality.
Solution Approach 2:
The cable is nested within the tubing structure, with the cable positioned inside a cable protective layer that is part of the tubing wall. This nested arrangement prevents the cable from shifting during operation while maintaining proper spacing and protection.
2Productivity
If traditional steel pipes are used for oil production, then oil transportation is achieved, but the submersible pump requires regular lifting for cleaning and the pipeline is difficult to install and turn
Solution Approach 1:
The tubing structure serves multiple functions simultaneously: it provides mechanical support for the submersible pump, contains and protects the power cable, enables oil production, and facilitates easy deployment and retrieval. This multi-functionality eliminates the need for separate cable and tubing components, simplifying operations.
3Volume of moving object
If coiled tubing is used with separate cable, then space utilization between tubing and casing is reduced, but the cable and tubing can be deployed separately
Solution Approach 1:
By merging the cable and tubing into a single integrated structure, the patent reduces the overall volume occupied by both components compared to deploying them separately. The integrated design allows the cable to occupy the space within the tubing wall rather than requiring additional annular space between the tubing and casing.
Data Source
AI summary
A tubing for an electric submersible pump (ESP) for oil production. Cables are wrapped outside a first outer sheath at equal intervals; an inner side of the cable is covered with an insulating layer; an inner side of the insulating layer is covered with an aluminum tape; and a conductor is nested inside the aluminum tape. The inner pipe is combined with the cable to meet the oil production requirement of a coiled tubing (CT) and solve a power transmission problem of the submersible pump. The first outer sheath and a second outer sheath ensure that the tubing has a high bearing capacity and stability inside. A first steel belt and a second steel belt ensure a high resistance to pulling and deformation inside the tubing in use.