The Drift is a fundamental and indispensable drilling tool designed to verify the internal diameter and ensure the passage integrity of downhole pipes such as casing, tubing, and drill pipe. As a critical quality control drilling tool, the Drift guarantees that the internal bore meets specified standards, preventing costly delays and potential failures during the running of subsequent, more complex drilling tool assemblies.
Drift for Casings: Types and Applications
Casing Drift tools are primarily available in two robust types, each serving as a specialized drilling tool for specific operational needs:
Sub Type Drift: This versatile drilling tool is manufactured with threads on both the top and bottom ends. The top end is directly connected to the drill string, which provides the force to push the Drift through the pipe. The standby bottom thread enhances the functionality of this drilling tool, allowing for extensions or adaptations, making it a reliable choice for various drifting scenarios.
Bail Type Drift: This configuration of the Drift drilling tool comprises a gauge plate and a connecting rod. Its design is optimized for efficiency and is commonly used with other drilling tool strings for a streamlined operation.
Specific Use Case: Ground-Based Inspection
The Double Bail Drift for tubing or drill pipe is a drilling tool typically used on the ground. The Drift diameter gauge itself features a long cylindrical body with sucker rod threads on both ends for easy connection. In this standard practice, the"drifting"process—pushing the Drift through the pipe to check for obstructions—is done manually, providing a quick and effective go/no-go gauge check before the pipe is run into the wellbore. This essential Drift procedure ensures that every joint of pipe is clear and within tolerance, safeguarding the entire drilling tool string from downhole complications.
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