Wellhead Hanger Seal Assembly for Cementing Flow Control

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing wellhead systems face inefficiencies in casing installation operations, particularly in managing fluid flow during cementing and sealing processes, which can be time-consuming and costly.

Innovation Solution

Incorporating a hanger with passages that are selectively sealed by a movable seal assembly, allowing fluid flow during cementing operations and blocking it afterward, integrated with the hanger and seal assembly run together into the wellhead housing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a hanger is installed in a wellhead housing, then casing support is achieved, but fluid flow management during cementing and sealing becomes complex and time-consuming

Engineering Contradiction:

Improvecasing supportVSAvoidfluid flow management time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The seal assembly is integrated with the hanger body, combining the casing support function and fluid sealing function into a single unified component. The seal assembly includes sealing surfaces and passages formed directly in the hanger, eliminating the need for separate sealing devices and reducing operational steps.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The seal assembly is designed to move between a retracted position (allowing fluid flow during cementing) and an extended position (blocking fluid flow after cementing). This dynamic movement enables the same structure to serve different functions at different operational stages, reducing time loss.

Inventive Principle:

Principle #15Dynamics

2Reliability

If separate sealing operations are performed after cementing, then fluid flow is blocked, but operational time and costs increase

Engineering Contradiction:

Improvefluid flow controlVSAvoidoperational efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The seal assembly is pre-configured within the hanger structure with sealing surfaces and passages already in place. The seal assembly can be moved to the extended position to block fluid flow immediately after cementing without requiring additional sealing operations, equipment, or time.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The seal assembly serves multiple functions: it provides fluid sealing during cementing operations, blocks fluid flow after cementing, and maintains structural integrity of the hanger. This multi-functionality eliminates the need for separate sealing devices and operations.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12473792B2Systems and methods for cementing casing and sealing a hanger in a wellhead housing

Publication Date: 2025.11.18 CAMERSON INT CORP

AI summary

A wellhead system includes a wellhead housing and a hanger configured to support a casing within the wellhead housing. The hanger includes one or more passages formed through the hanger. The wellhead system also includes a seal assembly configured to move relative to the hanger to selectively enable a flow of fluid across the hanger via the one or more passages. The hanger, the seal assembly, and a lock ring may be run together into the wellhead housing.