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Coiled tubing friction reducer
Abstract
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A tubing friction reducer (32) is mounted on a length of tubing within a bore hole. The friction reducer (32) comprises a cylindrical body (34) having a first section and a second section hingedly secured (40) around an exterior surface of the coiled tubing (18), the cylindrical body (34) having an outside diameter of an adjacent bore surface. A plurality of ball bearings (88) are positioned on and extending outwardly from the cylindrical body (34) extending in a generally axial direction along the cylindrical body (34) for the purpose of reducing friction between the coiled tubing (18) and the bore surface generated upon contact between the coiled tubing (18) and the bore surface.
Retaining mechanisms such as collapse springs (92) are included for securing the ball bearings (88) to the cylindrical body (34). The tubing friction reducers (32) are placed along the tubing (18) at intervals to either minimize injector force or prevent buckling and tubing failure due to wear.
Retaining mechanisms such as collapse springs (92) are included for securing the ball bearings (88) to the cylindrical body (34). The tubing friction reducers (32) are placed along the tubing (18) at intervals to either minimize injector force or prevent buckling and tubing failure due to wear.
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machine-classified
cpc-machine-classified
fterm-machine-classified
fterm-family-classified
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CA2231651A1
Canada
Laid-open patent application
- Other languages
French - Inventor
R. Ernst Krueger N. Bruce Moore -
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. - WWT International Inc
Worldwide applications
1996
US
GB
AU
WO
CA
Application number: US08/713,024
Filing date: 1996-09-12
Legal status: Expired - Lifetime
Application number: GB9805025A
Filing date: 1996-09-26
Legal status: Expired - Fee Related
Application number: AU71678/96A
Filing date: 1996-09-26
Legal status: Abandoned
Application number: PCT/US1996/015399
Filing date: 1996-09-26
Legal status: Application Filing
Application number: CA002231651A
Filing date: 1996-09-26
Legal status: Expired - Fee Related
Application CA002231651A events
A timeline of key events for this patent application, including priority claims,
publications, legal status, reassignments, and litigation.
Google has not performed a legal analysis and makes no representation as to the accuracy or completeness of the events listed.
Google has not performed a legal analysis and makes no representation as to the accuracy or completeness of the events listed.
1996-09-26
1997-04-03
2002-03-26
Application granted
2002-03-26
2016-09-26
Anticipated expiration
Status
Expired - Fee Related
Description
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Patent Citations (12)
Publication number
Priority date
Publication date
Assignee
Title
Family To Family Citations
* Cited by examiner, † Cited by third party
Cited By (48)
Publication number
Priority date
Publication date
Assignee
Title
Family To Family Citations
* Cited by examiner, † Cited by third party, ‡ Family to family citation
Similar Documents
Publication
Publication Date
Title
Priority And Related Applications
Applications Claiming Priority (5)
Application
Filing date
Title
US437495P
1995-09-27
US60/004,374
1995-09-27
US08/713,024
1996-09-12
Legal Events
Date
Code
Title
Description
1998-03-11
EEER
Examination request
2012-09-26
MKLA
Lapsed
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