Wireline Cable Collet Enclosure for Wellbore Friction Protection
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Solution Overview
Problem
Cables, particularly wireline cables, experience significant friction and damage within non-straight wellbores due to interactions with casing and subterranean formations, leading to cable degradation, breakage, and damage to the wellbore environment, resulting in high costs and operational delays.
Innovation Solution
A cable protection apparatus comprising a collet with a radially compressible body and an enclosure that can be adjusted between engaged and disengaged positions to apply compressive force, protecting the cable by minimizing friction and wear during operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a wireline cable is used in non-straight wellbores, then the cable can reach distant or horizontally drilled locations, but the cable experiences high friction and damage from interactions with casing and subterranean formations
Solution Approach 1:
A protective apparatus acts as an intermediary between the wireline cable and the wellbore environment. The apparatus includes a collet with gripping elements that engage the cable, and an enclosure with a protective surface that interfaces with the wellbore. This mediator protects the cable from direct contact with damaging surfaces while enabling the cable to function in extended wellbore configurations.
Solution Approach 2:
The protective apparatus provides beforehand cushioning by positioning the collet and enclosure around the cable before it encounters damaging wellbore conditions. The enclosure absorbs impacts and friction forces that would otherwise directly affect the cable, preventing damage in advance during cable deployment and retrieval operations.
2Ease of operation
If the cable is pulled through non-smooth portions of the wellbore, then the cable can be retrieved or tools placed, but the friction causes cable degradation and potential breakage
Solution Approach 1:
The protective apparatus serves as an intermediary that enables cable retrieval operations while protecting cable integrity. The enclosure provides a smooth external surface that reduces friction during retrieval, while the collet securely engages the cable to prevent damage during pulling operations through non-smooth wellbore portions.
Solution Approach 2:
The protective apparatus employs flexible components including the radially compressible collet body and the enclosure structure. These flexible elements can deform to navigate non-straight wellbore paths while maintaining cable engagement and protection, allowing the apparatus to accommodate wellbore curvature without compromising cable integrity during retrieval.
3Object-affected harmful factors
If a protective apparatus is added to the cable, then cable damage is reduced, but the device complexity and installation time increase
Solution Approach 1:
The protective apparatus is segmented into distinct functional components: a collet with multiple gripping elements, an enclosure with protective surface, and an adjustment mechanism. This segmentation allows each component to perform its specific function efficiently while enabling modular assembly and installation on the cable without requiring complete replacement of the cable system.
Solution Approach 2:
The collet body is designed with radial compressibility, allowing it to dynamically adjust between expanded and compressed states. This dynamic characteristic enables the collet to be installed over the cable in an expanded state, then compressed to secure the cable, providing adaptive protection that responds to operational conditions while maintaining manageable device complexity.
4Strength
If the collet body is radially compressible, then the cable can be securely engaged, but the manufacturing precision requirements increase
Solution Approach 1:
The collet body's radial compressibility allows it to change its dimensional parameters between expanded and compressed states. This parameter change capability enables the collet to achieve secure cable engagement through controlled compression while accommodating normal manufacturing tolerances during production, as the compressible design provides a range of acceptable dimensions rather than requiring exact precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The apparatus effectively reduces cable wear and damage, minimizes operational disruptions, and protects wellbore components by absorbing impacts, adhering to industry standards and ensuring compliance with minimal installation and uninstallation times.
Implementation Method 1
the collet body is radially compressible along the collet length... where the enclosure body applies a compressive force via the receiving chamber sufficient to put the collet body in the compressed state
Implementation Method 2
The apparatus effectively reduces cable wear and damage, minimizes operational disruptions, and protects wellbore components by absorbing impacts
Data Source
AI summary
A cable protection apparatus can include a collet having a collet body and a collet bore, where the collet bore traverses through the collet body along its length, where the collet body is radially compressible along the collet length, where the collet bore has a reduced diameter when the collet body is compressed. The cable protection apparatus can also include an enclosure having an enclosure body, an enclosure bore, an enclosure channel, and an adjustment feature, where the enclosure bore traverses through the enclosure body along its length, where the enclosure channel traverses a thickness of the enclosure body to the enclosure bore along the enclosure length, where the enclosure bore traverses a receiving chamber disposed within the enclosure body, where the receiving chamber is configured to receive the collet, where the adjustment feature manipulates the enclosure body to apply a force to compress the collet body.