Method and apparatus for high speed measurement of oilfield tubular diameter and ovality
US5867275A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 1997 |
| Grant date | Feb 2, 1999 |
| Priority date | — |
| Expiry date | May 5, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/105
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A test apparatus 10 for testing the diameter of oilfield tubulars having various nominal diameters includes a machine frame 12 for successively receiving the axially movable tubulars, and upper and lower radially opposing carriages 16 and 18 each movable relative to the machine frame. First and second light generating sources 24 and 26 are each mounted on a respective carriage and transmit a wide light beam directed to intersect radially opposing sides in the oilfield tubular, such that the width of each light beams is reduced by engagement with the tubular. First and second light detectors 28 and 30 are each mounted on the carriages and are positioned for detecting the position of the reduced width light beams relative to the carriages and generating test signals in response thereto. Computer 32 is provided for receiving test signals from the sensors and generating a tubular diameter test measurement in response thereto. The test apparatus includes upper and lower optical shutters 52 and 54 each mounted on the carriages and movable from an active standardization check position to an inactive position. Each shutter has an opening therein for transmitting a preselected reduced width…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.