Tubing-conveyed external gauge carriers

Details Tubing-conveyed external gauge carriers Tubing-conveyed external gauge carriers

E - Fixed Constructions

21

B

166/3

E21B 49/08 (2006.01) E21B 47/01 (2006.01) E21B 47/06 (2006.01)

Patent

CA 1201057

- 12 - Abstract of the Disclosure 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 measure- ment 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.

446863

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