Tension Frame for Riser Systems with Pre-installed Pressure Control
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Solution Overview
Problem
The installation and de-installation of pressure control equipment in tension frames for riser systems in hydrocarbon exploration and production is time-consuming and risky due to vertical relative motion between the tower and the riser, necessitating a solution for faster and more efficient operations.
Innovation Solution
A tension frame with pre-installed pressure control equipment units for both wire line and coiled tubing operations, allowing for quick activation and parking of either unit on either side of the riser center, reducing the need for frequent installation and de-installation on the surface flow tree.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pressure control equipment is installed on the surface flow tree during wire line and coiled tubing operations, then the operations can be performed, but the installation and de-installation process is time-consuming and risky due to vertical relative motion between the tower and the riser
Solution Approach 1:
The tension frame is equipped with pressure control equipment units that are pre-installed and parked in ready-to-use positions before operations begin. This preliminary preparation eliminates the need for time-consuming installation during actual wire line and coiled tubing operations, directly resolving the contradiction between operational capability and installation time.
2Ease of operation
If pressure control equipment is installed on the surface flow tree, then wire line and coiled tubing operations can be conducted, but the frequent installation and de-installation increases operational risk due to vertical relative motion
Solution Approach 1:
The tension frame serves as an intermediary structure that hosts multiple pressure control equipment units. This intermediary platform allows operations to be conducted without repeatedly installing and de-installing equipment on the surface flow tree, thereby reducing operational risks associated with vertical relative motion while maintaining ease of operation.
3Productivity
If pressure control equipment is pre-installed in the tension frame, then installation time is reduced, but the tension frame structure becomes more complex
Solution Approach 1:
The tension frame is designed with multi-functionality to host multiple pressure control equipment units simultaneously. This universal design allows the same structural platform to support different types of pressure control equipment for both wire line and coiled tubing operations, improving productivity while managing structural complexity through versatile, standardized mounting arrangements.
Data Source
AI summary
A tension frame (2) for its application in a riser system for hydrocarbon exploration and production. The tension frame is (2) installed on a well control unit (5) atop at least one riser (9) in said riser system. The frame is adapted to receive a pressure control unit and hold it in line with the centre of the riser. The tension frame (2) houses at least two pre-installed pressure control equipment units (3, 4) of which one at a time is adapted to be hold at an active position, in which the unit is in line with the centre of the riser, and the other is adapted to be kept in a parked position within the frame.