Integral Wear Pad for Drill Pipe Wear Protection
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Solution Overview
Problem
Standard weight drill pipes experience premature wear and failure during directional drilling due to bending and well bore contact, with existing wear pads being inefficient and requiring frequent maintenance, which slows down drilling operations and increases operational costs.
Innovation Solution
An integral wear pad is integrated into the drill pipe, centrally located or positioned between upsets, providing enhanced protection through a larger diameter and hardbanding layer, maintaining the mechanical properties of the drill pipe and reducing wear, while manufacturing methods include bonding and welding techniques to ensure concentric alignment and consistent metallurgical grain structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If clamp style wear pads are installed on the exterior surface of the drill pipe, then the drill pipe is protected from wear, but the wear pads tend to slip leaving target wear prone areas exposed and require frequent installation and maintenance
Solution Approach 1:
The wear pad is merged with the drill pipe body to form an integral structure. The wear pad is created by upsetting the drill pipe material itself, eliminating the need for separate clamp-style attachments. This integration ensures the wear pad cannot slip or become detached, and eliminates frequent installation and maintenance requirements.
Solution Approach 2:
The drill pipe material serves its own protective function by being upset to form the wear pad. The same material that constitutes the drill pipe body is transformed into a hardened protective layer, eliminating the need for external protective components and their associated installation and maintenance operations.
2Strength
If drill collars and intermediate weight members are used as transition components, then impact loads on the drill pipe are reduced, but the drill rig power consumption increases and flexibility is reduced
Solution Approach 1:
Instead of using heavier drill collars and intermediate weight members throughout the drill string, the wear pad provides localized reinforcement only at the specific location where wear occurs. The upset material creates a locally hardened region with increased wall thickness, providing impact load resistance precisely where needed without adding weight elsewhere in the system.
3Reliability
If sleeve-like wear pads are installed on the drill pipe, then wear protection is provided, but the installation and maintenance operations slow down drilling productivity
Solution Approach 1:
The wear pad is formed during the drill pipe manufacturing process itself, before the drill pipe is deployed to the well site. The upsetting process creates the protective wear pad as an integral part of the drill pipe body, eliminating the need for separate installation operations at the well site and thereby maintaining drilling productivity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The integral wear pad significantly extends the life of the drill pipe by reducing wear and maintenance needs, enhancing operational efficiency and safety, and maintaining the mechanical properties of standard weight drill pipes, thus reducing downtime and operational costs.
Implementation Method 1
The first and second upsets are integrally bonded to one another thereby yielding a single drill pipe having an integral wear pad
Implementation Method 2
an integral wear pad is integrated into the drill pipe, centrally located or positioned between upsets
Data Source
AI summary
The current invention provides a drill pipe of standard weight with an integral wear pad. The drill pipe with integral wear pad provides increased durability while retaining the strength, flexibility, lightweight, and other performance characteristics of standard weight drill pipe. The current invention also provides methods for making a standard weight drill pipe with integral wear pad.