Explanation of Doubtful Points of API Round Thread Casing and Coupling Thread Standoff

Yu Fu; Zun Yi Wei; Xiao Liang Bai; Na Feng; Jian Wu; Yu Feng Ai

doi:10.4028/www.scientific.net/AMM.241-244.444

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 241-244Explanation of Doubtful Points of API Round Thread...

Explanation of Doubtful Points of API Round Thread Casing and Coupling Thread Standoff

Abstract:

This article introduces briefly the design feature of thread gauges used in the inspection of API round thread casing and coupling thread standoff, and expounds some questions relating to the extending amount, the positive and negative sign of standoff P and P1, the thread number of hand tight standoff A and the revising of short round thread standoff, which may be ignored easily in the control and inspection of the casing and coupling standoff. The article also gives the right inspecting procedure of the round thread casing and coupling thread to avoid erroneous judgement in the course of standoff inspection.

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Periodical:

Applied Mechanics and Materials (Volumes 241-244)

Pages:

444-448

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.241-244.444

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Cite this paper

Online since:

December 2012

Authors:

Yu Fu*, Zun Yi Wei, Xiao Liang Bai, Na Feng, Jian Wu, Yu Feng Ai

Keywords:

Casing Coupling, Gauge, Inspection, Round Thread Casing, Standoff

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* - Corresponding Author

References

[1] American Petroleum Institute1API SPECIFICATION STANDARD 5B, Specification for Threading, Gaug ing and Thread Inspection of Casing , Tubing and Line Pipe Threads. (1996).

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[2] American Petroleum Institute. API RECOMMENDED PRACTICE 5B1( RP 5B1). (1993).

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[3] American Petroleum Institute. API RECOMMENDED PRACTICE 5C1( RP 5C1). (1994).

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[4] American Petroleum Institute. API SPECIFICATION 5CT, Specification for Casing and Tubing. (1995).

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