Integrated Subsea Pig Launcher for Jumper-Free Remote Launching
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Solution Overview
Problem
Existing subsea pig launcher systems are complex and require additional infrastructure, such as separate foundations and jumper arrangements, which complicates frequent utility pig launches for wax deposit removal and monitoring in hydrocarbon pipelines.
Innovation Solution
A simplified remotely operated pig launcher system that connects directly to existing production manifold systems, utilizing existing control and injection systems, eliminating the need for additional jumpers or flying leads, and includes a tubular pig housing with kicker valves and a subsea control module for efficient pig launching and retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simplified remotely operated pig launcher is used, then device complexity is reduced, but pig launching capability may be compromised
Solution Approach 1:
The patent combines the pig launcher with the production manifold by integrating the kicker valve assembly directly into the manifold structure. The kicker valves are mounted on the manifold body, and the pig launcher housing is positioned to utilize the manifold's existing fluid pathways and structural support, eliminating the need for a separate standalone launcher module while maintaining full pig launching functionality.
Solution Approach 2:
The production manifold is designed to serve dual functions: its primary function for fluid distribution and its secondary function as an integrated pig launcher. The kicker valves, originally intended for fluid injection, are utilized to launch pigs into the pipeline. This multi-functional design allows the same hardware structure to perform both production and pigging operations without requiring dedicated separate systems.
2Adaptability or versatility
If additional jumper arrangements and foundations are installed, then pig launching functionality is enhanced, but installation complexity and cost increase
Solution Approach 1:
The patent merges the pig launcher functionality with the existing production manifold structure. The kicker valves are mounted directly on the manifold body, and the launcher housing utilizes the manifold's structural framework. This integration eliminates the need for separate jumper arrangements and independent foundation structures, as the manifold itself serves as both the production facility and the pig launching platform.
Solution Approach 2:
The production manifold provides self-service by utilizing its own existing infrastructure (fluid pathways, structural support, mounting points) to enable pig launching functionality. The manifold's internal geometry and existing valve arrangements are leveraged to launch pigs without requiring external auxiliary systems or additional infrastructure installations.
3Ease of operation
If kicker valves and control pipes are integrated into the manifold, then ease of operation is improved, but manufacturing complexity increases
Solution Approach 1:
The control pipes for the kicker valves are integrated directly into the manifold's fluid distribution network. The same fluid pathways that serve production functions are utilized to deliver control fluid to the kicker valves. This merging of control infrastructure with production infrastructure simplifies operation by using existing manifolds and fluid systems rather than requiring separate dedicated control piping for pig launching.
Solution Approach 2:
The manifold's fluid distribution system serves multiple functions: it distributes production fluids to various lines and simultaneously provides control fluid to the kicker valves for pig launching. The existing valve actuators and fluid pathways are utilized for dual purposes, reducing the need for separate control systems while maintaining ease of operation through the manifold's centralized control architecture.
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 frequent and efficient use of utility pigs for wax deposit removal and monitoring without additional infrastructure, allowing for direct connection to existing systems and simplified maintenance and operation.
Implementation Method 1
Each kicker valve (2) comprises a control pressure inlet (42) and a flow inlet (22). A kicker valve control pipe (4) is connected to the control pressure inlet (42) on each of the kicker valves (2) and to a kicker system connector (3).
Data Source
AI summary
The present invention concerns a pig launcher comprising a tubular pig housing holding several pigs in line. A main connector is connectable to a fluid flow line at an end of the tubular pig housing. A kicker valve is provided for each pig and includes a control pressure inlet, a flow inlet and a flow outlet. A kicker valve control pipe is connected each of the kicker valves and to a kicker system connector. A kicker header is connected to the flow inlet of each of the kicker valves. A kicker branch pipe is connected between each of the kicker valves and the kicker branch pipe inlet for each of the number of pigs.