Method and apparatus for coiled tubing inspection
First Claim
1. Apparatus for testing of continuous tubing at a well site adjacent to a well bore, comprising:
- an elongate housing securely supported between a source of continuous tubing and the well bore to receive the tubing therethrough;
first and second resilient sealing means secured on opposite ends of said elongate housing and each receiving said continuous tubing therethrough in sealed manner;
an acoustic energy test array having generally cylindrical form being disposed in alignment between said first and second resilient sealing means to receive the continuous tubing axially;
plural, equi-spaced, circumferentially placed acoustic energy sensors disposed in radial alignment around said test array and being operative for determining the degree of ovality of said continuous tubing;
compartmentation means within said elongate housing having couplant fluid input and output and extending through said test array and between said first and second resilient sealing means to surround said continuous tubing; and
couplant fluid continually flowing through said compartmentation means.
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Accused Products
Abstract
An inspection head for continuous acoustic energy inspection of coiled tubing consisting of a generally cylindrical test head for receiving the tubing longitudinally therethrough while being sealed on each end to maintain fluid couplant circulation. A cylindrical test array is disposed within the head to receive the tubing while directing a plurality of radially aligned compressional wave acoustic sensors and single in-line, angularly oriented shear wave acoustic sensors. Analysis of the various signal returns enables derivation of ovality, inside wall pitting, outside wall pitting, wall thickness, and transverse and/or longitudinal flaws.
61 Citations
31 Claims
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1. Apparatus for testing of continuous tubing at a well site adjacent to a well bore, comprising:
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an elongate housing securely supported between a source of continuous tubing and the well bore to receive the tubing therethrough; first and second resilient sealing means secured on opposite ends of said elongate housing and each receiving said continuous tubing therethrough in sealed manner; an acoustic energy test array having generally cylindrical form being disposed in alignment between said first and second resilient sealing means to receive the continuous tubing axially; plural, equi-spaced, circumferentially placed acoustic energy sensors disposed in radial alignment around said test array and being operative for determining the degree of ovality of said continuous tubing; compartmentation means within said elongate housing having couplant fluid input and output and extending through said test array and between said first and second resilient sealing means to surround said continuous tubing; and couplant fluid continually flowing through said compartmentation means. - View Dependent Claims (5, 6, 7, 9, 12)
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2. Apparatus as set forth in claim which is further characterized to include:
a second acoustic energy sensor disposed in said test array as directed radially but at a longitudinal angle of approximately 55°
to the axis of said test array for determining pitting of an outside surface of said continuous tubing.- View Dependent Claims (4, 10)
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3. Apparatus as set forth in claim which is further characterized to include:
a third acoustic energy sensor disposed in said test array as directed radially but at a longitudinal angle of approximately 70°
to the axis of said test array for determining pitting of an inside surface of said continuous tubing.
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8. Apparatus as set forth in claim which is further characterized to include:
first and second pairs of spaced rollers each mounted adjacent the respective first and second sealing means in contact with and directing said continuous tubing. - View Dependent Claims (11)
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13. Apparatus for on-site testing of continuous tubing when fed from a spool source to a well bore, comprising:
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a housing assembly adapted for enclosure around said continuous tubing; first and second resilient seals disposed on opposite sides of said housing assembly and in alignment to receive the continuous tubing therethrough; fluid-tight first compartmentation means enveloping said continuous tubing and extending between said seals, a portion of said first compartmentation means being formed as a generally cylindrical test array frame disposed coaxially with said continuous tubing passing therethrough; a plurality of acoustic sensors seated about the circumference of said test array frame and directed in radial alignment toward said continuous tubing; a fluid couplant maintained within said first compartmentation means; a plurality of pulser-preamp circuits connected to control respective acoustic sensors and provide a signal output; and means for processing the signal output and determining the degree of ovality of said continuous tubing. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method for testing of continuous tubing at a well bore, comprising the steps of:
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intercepting the continuous tubing between a reel source and the point of entry into the well bore; maintaining a fluid couplant envelope at said point of interception as said continuous tubing moves therethrough; effecting plural acoustic sensor operation within said fluid couplant envelope to determine any variations between orthogonal diameters of said tubing; and indicating said variations between orthogonal diameters as a degree of ovality of said tubing. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31)
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Specification