Mouse-Hole Davit Arm Base for Wellhead Access Constraints

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Solution Overview

Problem

Davit arms used in oil and gas operations face challenges in being positioned close to wellheads due to spatial constraints, necessitating a solution to facilitate their use in more advantageous locations.

Innovation Solution

A davit arm base with a base plate and sleeve designed to fit into a mouse hole, allowing secure support for the davit arm near the wellhead, comprising a sleeve and base plate with adjustable dimensions to fit various hole sizes and including mounting holes for davit base mounts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a davit arm is positioned close to the wellhead, then operational efficiency and safety are improved, but spatial constraints and installation difficulty increase

Engineering Contradiction:

Improveoperational efficiencyVSAvoidinstallation difficulty

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The davit arm base is divided into two main segments: a base plate for surface mounting and a sleeve for insertion into the mouse hole. This segmentation allows the base to be installed in a constrained space near the wellhead while maintaining structural integrity and load-bearing capacity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The sleeve is designed to be inserted into and nested within the mouse hole, which is a small access opening near the wellhead. This nesting approach allows the davit arm base to occupy minimal space while still providing a stable mounting position close to the wellhead, thereby improving operational efficiency without requiring additional installation space.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Adaptability or versatility

If the sleeve dimensions are customized to fit specific mouse hole sizes, then adaptability is improved, but manufacturing complexity increases

Engineering Contradiction:

Improvefit to various hole sizesVSAvoidmanufacturing complexity

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The sleeve is designed with adjustable dimensional parameters including length, outer diameter, and inner diameter. These parameters can be modified to match specific mouse hole dimensions while maintaining the overall structural design and functionality of the davit arm base, allowing adaptation to various wellhead configurations without requiring complete redesign.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20260015208A1Davit arm base and method of using the same

Publication Date: 2026.01.15 PETRO MECHANICAL SERVICES LLC

AI summary

A davit arm base for supporting a davit arm. The davit arm base includes a base plate for securing a davit base mount thereto and a sleeve extending from the base plate for extending down into a mouse hole for an oil and gas well. A method that includes the step of sliding a sleeve of a davit arm base into a mouse hole and supporting a davit arm with via a base plate of the davit arm base.