Sealed Well Cellar Fluid Leakage Prevention
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Solution Overview
Problem
Conventional well cellars often leak fluids such as lubricants, drilling mud, and oil, leading to soil and water pollution, which requires costly remediation before a well can be capped.
Innovation Solution
A sealed well cellar system with a planar base, vertically extending side walls, and sealing mechanisms between the base, side walls, and conductor pipe to prevent fluid flow, along with features like a beveled or scalloped riser for structural integrity and anti-buoyancy measures to prevent floatation, and provisions for auxiliary equipment and sacrificial anodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional well cellar designs are used, then structural support is provided, but fluid leakage occurs causing soil and water pollution
Solution Approach 1:
The patent combines multiple sealing mechanisms (gaskets, seals, and structural design) into an integrated well cellar system that prevents fluid leakage at all interfaces, including between the well cellar and surrounding soil, thereby eliminating pollution while maintaining structural reliability
Solution Approach 2:
The patent introduces sealing elements such as gaskets and sealant materials as intermediary components between the well cellar structure and the surrounding environment, which mediate the interface to prevent fluid escape and protect against soil and water contamination
2Reliability
If seal means are added between side members and base, then fluid flow is prevented, but device complexity increases
Solution Approach 1:
The patent employs flexible gaskets and sealant films as thin-film sealing solutions that conform to the interfaces between side members and base, providing reliable fluid containment without requiring complex mechanical sealing structures
Solution Approach 2:
The patent modifies the physical parameters of the sealing materials (such as using compressible or adaptable sealants) to achieve effective sealing through material property optimization rather than through complex geometric or structural designs
3Reliability
If attachment between base and conductor pipe is made, then fluid flow is prevented, but structural integrity requirements increase
Solution Approach 1:
The patent merges the sealing function and structural attachment function into a single integrated connection system between the base and conductor pipe, where the seal means also serve as the attachment mechanism, thereby preventing fluid flow while maintaining structural integrity without requiring separate components
Data Source
AI summary
A well cellar system includes a substantially planar base plate, the base defining an aperture sized to receive a conductor pipe. The planar base plate is an integral structural member which, in conjunction with the seal between the base plate and the wall and the riser and the conductor, are sufficiently robust to support the weight of the conductor pipe and its auxiliary equipment. The sealed well cellar is afforded with a laterally extending flange which serves as an anti-buoyancy anchor. A anti-buoyancy port allows the upward floatation pressure to be balanced out by water pressure within the cellar during placement to avoid floatation. A sacrificial anode housing is provided with a removable lid and holes for allowing passage of electrolyte. Although the preferred embodiments of sealed well cellars are metal and plastic, a cementaceous embodiment is also envisioned.