api drill pipe thread

api drill pipe thread

API 7 IF vs. REG vs. FH Threads - API (American Petroleum ...

Jun 14, 2005 · Briefly, I think API NC connections are regarded as teh 'base case' for most drill strings. The API NC thread form (the V-038R thread) is superior to Reg, FH and IF in fatigue resistance. API NC replaced a lot of other API connections such as API IF (which doesn't officially exist any more). However out of habit, lots of people still talk about 4-1/2 IF and so on (note that the NC thread IS NOT …

Connection selection is part of drill string design. A good source of information on drill string design is the TH Hill DS-1 standard, or any numb...1We still cut several more IF, Reg. and FH threads than we do NC in any given week, in a shop that primarily builds specialty wellhead equipment, wi...1Interesting. In API Spec 7, section 10.3 they list a table of equivalent connections. NC26= 2 3/8" IF, NC31= 2 7/8" IF, NC38= 3 1/2" IF, NC40=4 "...According to TH Hill, in 1968, the API took the most popular connections, gave all of them the better V-038R thread form which has smoother, more f...Good information again DrillerNic. That makes more sense now why they call them "equivalent". Thank YouNS-2 is available from Fearnley Procter Group in Houston and Aberdeen, 748600. NS-2 covers more than DS-1 and is part of the Drill string and we...Cheers MrSticky But it's interesting to get confirmaiton of what I've read about API numbered connections vs IF connections.....what happens to you...Nothing happens to your BHA design, most likely as your BHA will not usually have NC-50 - they will be provided by Schlum or Breakerfuse and they...Cnuk Generally you will not find anyone cutting actual IF connections any longer. The IF threadform was replaced by API in 1968 with the NC threa...3Just come across this thread - very useful, thanks! With all this talk of IF threads having worse fatigue resistance than NC, does anyone have the...1Difference between threads????Feb 14, 2008API NC50 Thread_ Connection performace See more results

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