MYNOV is a single sign-on solution.
Access multiple NOV applications and services with one login.
Register here Sign in
Description
The tables in the specifications tab summarize possible issues encountered in the field and suggest actions to troubleshoot these issues.
If you are unsuccessful in identifying the root cause of the connection issue, contact your Grant Prideco representative.
Specifications
High Breakout Torque
Possible Root Cause | Action |
Bad positioning of tongs on break-out (gripping thin section of box) | Ensure that tong-free area on box connection is respected |
False breakout torque reading (torquing equipment calibration) | Ensure torquing equipment is calibrated |
Downhole makeup (downhole dynamics, likely combined with improper makeup) |
|
Insufficient torque applied during run-in-hole |
|
Suspected connection damage | Get inspection company to confirm |
Downhole makeup search technique
If downhole makeup is suspected, place punch marks on the pin and box after initial makeup next to the sealing shoulders when running-in-hole. With downhole makeup, the position of the punch marks will change on pull-out-of-hole (¼ in. move is indicative of downhole makeup).
Downhole makeup can cause:
- Compressed/belled box counterbores
- Compressed/flared pin noses
Low Breakout Torque
Possible Root Cause | Action |
False makeup torque (torquing equipment calibration, gripping thin section of box) |
|
False breakout torque reading (torquing equipment calibration, iron roughneck not capable of giving breakout torque reading) |
|
Downhole dynamics (likely combined with improper makeup) |
|
Damaged Sealing Shoulders
Possible Root Cause | Action |
Pitting: lack of protection by thread compound, no application on sealing shoulders |
|
Galling: lack of thread compound application, contamination of thread compound |
|
Micro-washout: insufficient pressure on shoulders, presence of contaminant, out-of-length connection |
|
Damaged Thread/Galling/Pitting
Possible Root Cause | Action |
Pitting: lack of protection by thread compound (compound breaking by drilling/completion fluid) |
|
Galling: lack of thread compound application, contamination of thread compound |
|
Washout
Possible Root Cause | Action |
Connection washout |
|
Related Products
Running and Handling for Drill Stem Products
Best practices for running and handling to properly care for and maintain your Grant Prideco drill…
Care and Maintenance of Rotary-Shouldered Connections
Get more out of your drill string by properly maintaining your Grant Prideco drill stem products.
Corrosion Control
Reduce the likelihood of corrosion damage to your drill string.
Interfacing with Rig Tools
Best practices for using drill stem products with rig tools
Making-Up Connections
Recommendations for making-up drill stem components
Picking Up New Pipe and BHA Components
Best practices for picking up new Grant Prideco pipe and bottomhole assembly (BHA) components
Thread Compound Application
Protect your drill stem connections with thread compound.
Grant Prideco Licensee Network
Supporting our customers is our highest priority. Our expansive network of licensed repair…
Grant Prideco Technical Resources
Supporting our customers is our highest priority, and we look forward to partnering with you today…
Related Tools
Grant Prideco Licensee Locator
Our licensed repair facilities provide 24/7 service and technical support around the globe for…
Grant Prideco Connection Library
Access the most up-to-date technical documents and brochures for our Grant Prideco products.
Grant Prideco Performance Calculator
The Grant Prideco Performance Calculator enables you to generate performance specifications for…