Segmented V-Door Catwalk for Adjustable Pipe Handling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current automated pipe handling equipment for well servicing lacks the ability to vary the height of the V-door, leading to limitations in accommodating different well configurations and requiring manual crane operations, and existing grabbers fail to securely move 'slick pipe' along the catwalk.
Innovation Solution
A modular, automated pipe handling catwalk system with a V-door that can adjust height and a skate system equipped with a grabber head mechanism to securely handle and move pipes, allowing for variable height adjustments and secure pipe handling without the need for cranes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed V-door design is used, then the structure is simple and reliable, but the V-door height cannot be adjusted to accommodate different well configurations
Solution Approach 1:
The V-door is divided into multiple segments that can be independently positioned at different heights. Each segment can be adjusted vertically along the catwalk structure, allowing the V-door to accommodate different well configurations while maintaining structural integrity through modular design
Solution Approach 2:
The V-door transitions from a fixed structure to a dynamically adjustable structure. The segments can move vertically along guide tracks and be locked into position, providing adaptability for different work floor heights while maintaining stability during operation
2Adaptability or versatility
If telescoping tube designs are used to adjust V-door height, then height variability is achieved, but pipe size and weight restrictions occur and transition problems arise
Solution Approach 1:
Instead of using telescoping tubes that create transition problems, the V-door is segmented into discrete sections that move independently along separate guide tracks. This eliminates the nested tube transition issues while maintaining height adjustability
Solution Approach 2:
Guide tracks serve as intermediary structures that enable smooth vertical movement of V-door segments without direct tube-to-tube transitions. The guide tracks provide a reliable path for segment movement, eliminating the transition problems associated with telescoping designs
3Extent of automation
If the V-door is fixed in position at rig-up, then installation is simple, but crane equipment is required and manual labor increases
Solution Approach 1:
The V-door segments are designed to be self-positioning along the catwalk structure. During rig-up, segments can be independently installed and locked into position without requiring external crane assistance, enabling automated or manual positioning without heavy lifting equipment
Solution Approach 2:
The catwalk structure is pre-configured with guide tracks and mounting points that enable straightforward V-door segment installation. This preliminary preparation allows for simple, tool-free or minimal-tool positioning during rig-up without requiring complex positioning systems
4Force
If conventional grabbers are used to move slick pipe, then the system is simple, but sufficient clamping force cannot be achieved to overcome friction
Solution Approach 1:
The grabber mechanism incorporates a mechanical advantage system that multiplies the applied force. By using lever arms and linkage mechanisms, the system generates sufficient clamping force to overcome the friction of slick pipe without requiring excessively complex hydraulic or pneumatic systems
Solution Approach 2:
The grabber design replicates successful clamping mechanisms from other applications, adapting proven force-multiplication principles to the catwalk environment. This allows achievement of high clamping force through mechanically simple means rather than complex controlled systems
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
Enables flexible and efficient pipe handling across varying well configurations by allowing adjustable V-door heights and secure pipe movement, reducing manual labor and equipment requirements.
Implementation Method 1
the V-door can comprise a plurality of V-door segments sequentially and pivotally attached to each other wherein adjacent segments can pivot relative to one another when the V-door is extended from the catwalk up the V-door guide track
Implementation Method 2
Existing grabbers do not clamp the pipe between the skate v-plate with sufficient force to overcome the friction required to pull the pipe rearward
Data Source
AI summary
A pipe handling catwalk is provided for moving tubulars or pipe to and from a work floor of well drilling or service rigs. The catwalk includes a variable height V-door for guiding pipe to the work floor. The V-door is made of a series of sequential pivotally attached segments that can extend from, and retract into, the catwalk at an angle relative to the catwalk along a guide track disposed at an end of the catwalk.