CA2059594A1 - Pipe Coupling - Google Patents

Pipe Coupling

Info

Publication number
CA2059594A1
CA2059594A1 CA 2059594 CA2059594A CA2059594A1 CA 2059594 A1 CA2059594 A1 CA 2059594A1 CA 2059594 CA2059594 CA 2059594 CA 2059594 A CA2059594 A CA 2059594A CA 2059594 A1 CA2059594 A1 CA 2059594A1
Authority
CA
Canada
Prior art keywords
sealing
component
coupling
slope
load
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA 2059594
Other languages
French (fr)
Other versions
CA2059594C (en
Inventor
Thomas Layton Blose
David Lloyd Britten
Kevin James Humphreys
Trent Michael Victor Kaiser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Evraz Inc NA Canada
Original Assignee
Ipsco Inc Canada
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US07/770,566 external-priority patent/US5330239A/en
Application filed by Ipsco Inc Canada filed Critical Ipsco Inc Canada
Publication of CA2059594A1 publication Critical patent/CA2059594A1/en
Application granted granted Critical
Publication of CA2059594C publication Critical patent/CA2059594C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Earth Drilling (AREA)

Abstract

A pipe coupling or connection comprises a female coupling component and a mating male coupling component. Each component is matingly threaded for coupling engagement, and each is provided with an adjacent frusto-conical sealing surface. The sealing surface is provided with a controlled surface roughness, viz. very shallow fine surface variations, preferably formed as microgrooves at a pitch small relative to the pitch of the threads. The slope of the frusto-conical surface of the sealing area of the male component is slightly mismatched with that of the sealing area of the female component to simulate the bearing force vs. axial distance characteristic of shrunk-fit circular cylindrical sealing surfaces. The slight mismatch enables the sealing pressure to be above a design minimum throughout the entire sealing area yet higher at each end of the sealing area.
As the coupling is assembled, thread interference in the vicinity of the sealing surface lags the occurrence of interference between the sealing surfaces. Load threads are provided with negatively inclined load flank faces. The slope of the load thread pitch line of the male element is slightly steeper than the slope of the load thread pitch line of the female element.
CA 2059594 1991-10-03 1992-01-17 Pipe coupling Expired - Lifetime CA2059594C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/770,566 1991-10-03
US07/770,566 US5330239A (en) 1990-01-19 1991-10-03 Pipe coupling

Publications (2)

Publication Number Publication Date
CA2059594A1 true CA2059594A1 (en) 1993-04-04
CA2059594C CA2059594C (en) 1995-06-27

Family

ID=25088999

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2059594 Expired - Lifetime CA2059594C (en) 1991-10-03 1992-01-17 Pipe coupling

Country Status (1)

Country Link
CA (1) CA2059594C (en)

Also Published As

Publication number Publication date
CA2059594C (en) 1995-06-27

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