Patent · US Active

Multiple stage mechanical drift tool

US8061053B2 · kind B2 · utility

6Cited by

4References

20Claims

0Family size

Assignee

SCHLUMBERGER TECHNOLOGY CORPORATION · US

Inventor

Peter Gillan · Denend, GB

Key dates

Filing date	Apr 17, 2009
Grant date	Nov 22, 2011
Priority date	—
Expiry date	Jun 26, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49826
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A downhole tool for measuring a diameter of a borehole that includes a mandrel and a collet is disclosed. The collet is disposed about the mandrel that includes a tapered surface formed on an outside surface of the mandrel that increases in diameter across a portion of the mandrel. The collet includes deflectable arm portions with a borehole engagement portion that are adapted to engage the borehole. The borehole engagement portions in-turn may then engage the tapered surface or the steps of the mandrel, such that the collet can move with respect to the mandrel. With this movement of the collet, the outer diameter of the collet may progressively decrease, thereby also decreasing the outer diameter of the downhole tool.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.