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7th Annual Sucker Rod Pumping Workshop
Renaissance Hotel Oklahoma City, Oklahoma
September 27 - 30, 2011
Polished Rod Failure Prevention Justin Green, Sales Application Engineer Harbison Fischer
Polished Rod Failure Prevention
THE POLISHED ROD CARRIES THE ENTIRE WEIGHT OF THE ROD STRING PLUS THE FLUID LOAD AND THE DYNAMIC LOADS. • These loads do not cause the failures. • Polished Rod Failures are fatigue type breaks
due to improper installation.
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Polished Rod Failure Prevention
THIS PAPER WILL SHOW THERE ARE MORE ITEMS THAT CAN CAUSE POLISHED ROD PARTING INCREASING YOUR FAILURE FREQUENCY THAN:
ROD PUMP OR,
TUBING FAILURES
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Polished Rod Failure Prevention
THE NUMBER ONE CAUSE OF POLISHED ROD FAILURES IS: • ALIGNMENT
•COST OF REPAIRING THE FAILURE • PRODUCTION LOSS
• CORROSION DAMAGE WHILE DOWN • FIBERGLASS RODS or OTHER DOWNHOLE
EQUIPMENT MAY BE DAMAGED Sept. 27 - 30, 2011 2011 Sucker Rod Pumping Workshop 4
Polished Rod Failure Prevention
• PUMPING UNIT ALIGNMENT PUMPING UNIT IS TOO FAR FORWARD
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Polished Rod Failure Prevention
PUMPING UNIT IS: RIGHT OR LEFT OF THE HOLE
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Polished Rod Failure Prevention
BRIDLE INSTALLED INCORRECTLY
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Polished Rod Failure Prevention
OTHER ITEMS THAT CAN CAUSE BREAKS • HORSE’S HEAD INSTALLED WRONG AFTER
WELL SERVICE. TOP OF CARRIER BAR WORN.
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Polished Rod Failure Prevention
OTHER ITEMS THAT CAUSE BREAKS
• OVER OR UNDER TORQUE ON CLAMP BOLTS
HOW MUCH TORQUE ARE YOU SUPPOSED TO BE USING?
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Polished Rod Failure Prevention
• 220 POUNDS ON A 24” WRENCH HANDLE GIVES
YOU 450 POUNDS OF TORQUE!
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Polished Rod Failure Prevention
• IT’S BEST TO USE A TORQUE WRENCH! • COMPANIES THAT HAVE FURNISHED TORQUE
WRENCHES HAVE LOWERED THEIR PR FAILURES.
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Polished Rod Failure Prevention
MORE ITEMS THAT CAUSE BREAKS: • SUCKER ROD BOX ON POLISHED ROD PIN. • THE POLISHED ROD DOES NOT HAVE A
SHOULDER LIKE A SUCKER ROD DOES. • THERE IS A 9 DEGREE TAPER AT THE BACK OF
THE THREAD ON THE PR FOR THE PR COUPLING TO MAKE UP ON.
• THIS MATCHES THE 9 DEGREE TAPER ON THE POLISHED ROD COUPLING.
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Polished Rod Failure Prevention
POLISHED ROD COUPLING • ALWAYS USE A COUPLING DESIGNED FOR A
POLISHED ROD! • SUB-COUPLINGS OR COMBINATION
COUPLINGS ARE OK. • API SPEC 11B 7.2.1.3 CALLS FOR ALL SUB
COUPLINGS MANUFACTURED FOR CONNECTING DIFFERENT SIZES OF SUCKER RODS WILL HAVE A POLISHED ROD THREAD.
• LOOK FOR THE PR STAMP.
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Polished Rod Failure Prevention
POLISHED ROD COUPLING
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Polished Rod Failure Prevention
Clamping on spray metal coated polished rod.
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Polished Rod Failure Prevention
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CLAMP
STUFFING BOX
CARRIER BAR
POLISHED ROD SHOWNOUT OF ALIGNMENT
SPIRIT LEVEL PROPERLY ALIGNED(USE A 3 T0 4 FOOT LONG LEVEL)
UNIT IS OUT OF ALIGNMENT
MOVE UNIT TO CORRECTALIGNMENT
HARBISON-FISCHER901 NORTH CROWLEY ROAD-CROWLEY, TEXAS 76036-3798 / P.O. BOX 2477-FORT WORTH, TEXAS 76113-2477PHONE: (817)297-2211
MWM 2/99
Polished Rod Failure Prevention
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CENTER LINE
MIALINEDARRIER BAR
TOO FAR FORWARDN UNUN V N
0
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Copyright
Rights to this presentation are owned by the company(ies) and/or author(s) listed on the title page. By submitting this presentation to the Sucker Rod Pumping Workshop, they grant to the Workshop, the Artificial Lift Research and Development Council (ALRDC), and the Southwestern Petroleum Short Course (SWPSC), rights to:
– Display the presentation at the Workshop. – Place it on the www.alrdc.com web site, with access to the site to be as
directed by the Workshop Steering Committee. – Place it on a CD for distribution and/or sale as directed by the Workshop
Steering Committee.
Other use of this presentation is prohibited without the expressed written permission of the author(s). The owner company(ies) and/or author(s) may publish this material in other journals or magazines if they refer to the Sucker Rod Pumping Workshop where it was first presented.
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Disclaimer The following disclaimer shall be included as the last page of a Technical Presentation or Continuing Education Course. A similar disclaimer is included on the front page of the Sucker Rod Pumping Web Site. The Artificial Lift Research and Development Council and its officers and trustees, and the Sucker Rod Pumping Workshop Steering Committee members, and their supporting organizations and companies (here-in-after referred to as the Sponsoring Organizations), and the author(s) of this Technical Presentation or Continuing Education Training Course and their company(ies), provide this presentation and/or training material at the Sucker Rod Pumping Workshop "as is" without any warranty of any kind, express or implied, as to the accuracy of the information or the products or services referred to by any presenter (in so far as such warranties may be excluded under any relevant law) and these members and their companies will not be liable for unlawful actions and any losses or damage that may result from use of any presentation as a consequence of any inaccuracies in, or any omission from, the information which therein may be contained. The views, opinions, and conclusions expressed in these presentations and/or training materials are those of the author and not necessarily those of the Sponsoring Organizations. The author is solely responsible for the content of the materials. The Sponsoring Organizations cannot and do not warrant the accuracy of these documents beyond the source documents, although we do make every attempt to work from authoritative sources. The Sponsoring Organizations provide these presentations and/or training materials as a service. The Sponsoring Organizations make no representations or warranties, express or implied, with respect to the presentations and/or training materials, or any part thereof, including any warrantees of title, non-infringement of copyright or patent rights of others, merchantability, or fitness or suitability for any purpose.