Extended Reach Anchor Mandrel Ramps for Slip Segments
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Solution Overview
Problem
Existing downhole anchor designs face challenges in achieving a slim profile for insertion while ensuring sufficient grip and load resistance in larger tubing, as the thin connecting segments are limited by the need to maintain a small cross-section for passage and must withstand tensile loads during extension.
Innovation Solution
The anchor design features a mandrel with extended ramps through apertures in slip segments, allowing for a longer ramp length and thicker slip segments without increasing the drift diameter, enabling greater radial extension and improved load resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the slip segments are made thinner to reduce the drift diameter for insertion, then the tool can pass through smaller tubing, but the segments become more susceptible to tensile failure during extension
Solution Approach 1:
The mandrel ramps extend through the slip segments in the radial dimension, creating a three-dimensional ramp structure that provides extended ride-out surface area. This allows the slips to extend further radially while maintaining sufficient material thickness in the connecting segments to withstand tensile loads during setting operations
2Strength
If the slip segments are made thicker to increase tensile load capacity, then the segments can withstand higher loads during extension, but the drift diameter increases preventing passage through smaller tubing
Solution Approach 1:
The extended ramps utilize the radial dimension by extending through the slip segments, allowing thicker segments with higher tensile capacity without increasing the axial drift diameter. The ramps provide extended ride-out surface area in the radial direction, enabling both increased strength and maintained compact profile for insertion
3Length of moving object
If the ramp length is extended to allow greater radial extension for improved grip, then the anchor can support larger tubulars, but the connecting segments experience increased tensile stress
Solution Approach 1:
The ramps extend through the slip segments in the radial dimension, creating a distributed stress path. This three-dimensional ramp structure allows longer ramp length for greater radial extension while the material continuity through the segments distributes and reduces peak tensile stresses during the extension process
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
This design minimizes the required drift dimension for insertion while enabling further extension and enhanced grip in larger tubulars, effectively supporting tools under tensile loads without segment failure.
Implementation Method 1
The slip segments have ramps adjacent the apertures and in the preferred embodiment ride out on a plurality of spaced ramps on the mandrel
Implementation Method 2
ramps 42 and 44 of mandrel 40. The actuation occurs by relative movement between the two
Data Source
AI summary
An anchor features a mandrel with ramps that extent through apertures in slip segments giving the slips a longer ramp to ride out on in a radial direction. The slip segments have ramps adjacent the apertures and in the preferred embodiment ride out on a plurality of spaced ramps on the mandrel.