Boring or penetrating the earth – With signaling – indicating – testing or measuring – Measuring or indicating drilling fluid rate of flow
Patent
1984-02-23
1986-06-10
Novosad, Stephen J.
Boring or penetrating the earth
With signaling, indicating, testing or measuring
Measuring or indicating drilling fluid rate of flow
175320, 166242, E21B 4706, E21B 4910, E21B 1716
Patent
active
045937710
ABSTRACT:
An external gauge carrier for use in tubing-conveyed drill stem testing comprises a protective housing for locating and securing the pressure measuring and recording system. The gauge carrier may be manufactured from drill collar bar stock but provides a 1--1 interface with ordinary drill pipe, other measurement subs, perforating guns and the like; i.e., to the complete system it "looks" like a drill collar. The gauge measures and records drill stem bore pressure while providing "full bore" testing capabilities, i.e., the gauge carrier allows unimpeded wireline operation therethrough and causes essentially no pressure drop throughout its length. Special machining and gauge placement is required in order to provide the above capabilities and features while still maintaining sufficient wall thickness to ensure structural integrity. A unique system for protecting the relatively delicate gauges from damage due to shocks from pressure surges is also disclosed.
REFERENCES:
patent: 3225830 (1965-12-01), Livingston
patent: 3965978 (1976-06-01), Conley et al.
patent: 4105279 (1978-08-01), Glotin et al.
patent: 4183243 (1980-01-01), Patterson et al.
patent: 4190124 (1980-02-01), Terry
patent: 4428626 (1984-01-01), Blau et al.
patent: 4512402 (1985-04-01), Kompanek et al.
Bagnell David J.
Johnson, Jr. William E.
McClenny Carl O.
NL Sperry-Sun of Canada, Ltd.
Novosad Stephen J.
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