CA2160400A1 - Well rod, centralizer and centralizer stop interfaces with wear reducing surface - Google Patents

Well rod, centralizer and centralizer stop interfaces with wear reducing surface

Info

Publication number
CA2160400A1
CA2160400A1 CA 2160400 CA2160400A CA2160400A1 CA 2160400 A1 CA2160400 A1 CA 2160400A1 CA 2160400 CA2160400 CA 2160400 CA 2160400 A CA2160400 A CA 2160400A CA 2160400 A1 CA2160400 A1 CA 2160400A1
Authority
CA
Canada
Prior art keywords
centralizer
hardness
rod
centralizers
stops
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 2160400
Other languages
French (fr)
Other versions
CA2160400C (en
Inventor
Andrew Squires
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.)
Robbins and Myers Energy Systems LP
Original Assignee
Enterra Patco Oilfield Products Ltd
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 US08/528,334 external-priority patent/US5692562A/en
Application filed by Enterra Patco Oilfield Products Ltd filed Critical Enterra Patco Oilfield Products Ltd
Publication of CA2160400A1 publication Critical patent/CA2160400A1/en
Application granted granted Critical
Publication of CA2160400C publication Critical patent/CA2160400C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Sliding-Contact Bearings (AREA)
  • Earth Drilling (AREA)

Abstract

Improved wear interface surfaces on well rod centralizers and centralizes stops. Well apparatus includes a rotary tool in a string of tubing extending into a well hole in the earth and a rod extending to the ground surface through such tubing which is drivingly connected to the tool. Centralizers are used on the rod and are located between a pair of centralizes stops. The stops and centralizers associated therewith having wear interface surfaces and at least one of the wear interface surfaces which abut one another having a material thereon of a hardness in the range of 7 to 10 in Mohs scale of hardness and thereby having a hardness greater than the hardness of abrasive materials likely, during use, to pass through said tubing.
CA 2160400 1995-09-14 1995-10-12 Well rod, centralizer and centralizer stop interfaces with wear reducing surface Expired - Fee Related CA2160400C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/528,334 1995-09-14
US08/528,334 US5692562A (en) 1995-04-13 1995-09-14 Well rod, centralizer and centralizer stop interfaces with wear reducing surface

Publications (2)

Publication Number Publication Date
CA2160400A1 true CA2160400A1 (en) 1997-03-15
CA2160400C CA2160400C (en) 2005-08-16

Family

ID=24105251

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2160400 Expired - Fee Related CA2160400C (en) 1995-09-14 1995-10-12 Well rod, centralizer and centralizer stop interfaces with wear reducing surface

Country Status (1)

Country Link
CA (1) CA2160400C (en)

Also Published As

Publication number Publication date
CA2160400C (en) 2005-08-16

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed