Drilling Wellhead With Integrated Casing Hanger for Faster Mounting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional wellhead equipment for offshore oil drilling has a complex structure and cumbersome mounting procedures, leading to high costs and reduced time efficiency in drilling and well completion operations.
Innovation Solution
A simplified wellhead equipment design featuring a two-layer casing structure with a high-pressure wellhead connected to a conductor string and a guide base plate, incorporating a casing hanger and first casing string, along with features like support steps, locking rings, and guide posts for enhanced stability and ease of assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional wellhead equipment with multiple casing hangers and sealing assemblies is used, then sealing and positioning functions are ensured, but device complexity and mounting procedure complexity increase
Solution Approach 1:
The patent combines multiple casing hangers (first-position and second-position casing hangers) into a single integrated casing hanger structure. The sealing assemblies are also merged into the wellhead body, eliminating the need for separate sealing components. This merging reduces device complexity while maintaining the sealing function through the integrated design.
Solution Approach 2:
The wellhead body is designed as a multi-functional component that integrates sealing, positioning, and support functions. The single casing hanger is designed to perform multiple roles including suspending casing strings, providing sealing surfaces, and positioning within the wellhead. This universality reduces the number of components needed while ensuring reliable sealing and positioning.
2Reliability
If conventional wellhead equipment with multiple casing hangers and sealing assemblies is used, then sealing and positioning functions are ensured, but mounting time and operating materials increase
Solution Approach 1:
By merging multiple casing hangers into a single integrated structure and incorporating sealing assemblies directly into the wellhead body, the number of components requiring assembly is reduced. This leads to fewer mounting steps, less handling of operating materials, and reduced mounting time while maintaining sealing reliability through the integrated design.
Solution Approach 2:
The sealing assemblies are pre-integrated into the wellhead body during manufacturing, eliminating the need for separate installation steps during field assembly. The single casing hanger is designed with pre-configured sealing surfaces and positioning features, allowing for quicker and more efficient mounting while ensuring proper sealing function.
3Manufacturing precision
If conventional wellhead equipment with multiple casing hangers is used, then positioning accuracy is ensured, but device complexity increases
Solution Approach 1:
The single casing hanger is designed as a multi-functional component that integrates positioning, sealing, and support functions. The wellhead body includes integrated positioning features and sealing surfaces that work together to achieve accurate positioning without requiring multiple separate hangers. This reduces structural complexity while maintaining positioning accuracy through the coordinated design of the integrated components.
Data Source
AI summary
Provided is a wellhead equipment for drilling including a wellhead, a conductor string, a guide base plate, a casing hanger and a first casing string. The guide base plate includes a base plate body and a mounting cylinder fixedly arranged in the base plate body, a top end of the wellhead is positioned above the mounting cylinder and provided with an interface part, a bottom end of the wellhead is positioned below the mounting cylinder, the conductor string is positioned below the wellhead, the conductor string is fixedly connected and communicated with the wellhead, a support ring fixedly clamped with the mounting cylinder sleeves an outer wall of a part, positioned in the mounting cylinder, of the wellhead, the casing hanger is clamped in the wellhead, the first casing string is positioned below the casing hanger, and the first casing string is fixedly connected with the casing hanger.