Introducing Dopeless Coating Technology

Tue, 01/22/2013 - 13:07

Liquid-based lubricants have traditionally been applied to casing and tubing connections in the mill for storage and again manually with a brush in the field to make up connections. Tenaris has developed Dopeless technology, a dry, multifunctional coating applied in a controlled industrial process that assures the exact amount of lubricant is evenly applied to each connection. Dopeless technology provides lubrication for multiple make and breaks, avoiding corrosion and offering rig-ready pipes. “Dopeless connections are able to withstand even the most demanding operating conditions, such as offshore, Arctic, desert, shale, and jungle environments. More than two million meters of pipe with Dopeless connections have been run worldwide in more than 30 countries. Investments have been made to introduce dedicated production lines at our facilities, accessory and repair units on four continents. The benefits of our dope-free technology have been proven in different drilling applications for more than a decade,” says Tomás Castiñeiras, Tenaris’s Dopeless technology project manager.

Tenaris recently inaugurated a new, dedicated Dopeless coating line at its mill in Veracruz in order to cut time to market. This line has the production capacity to supply oil and gas customers operating in the Gulf of Mexico. “With Dopeless technology, pipes arrive rig-ready, avoiding the need to transport the materials to cleaning or preparation areas for dope replacement before delivery to the rig. By simplifying handling and installation procedures, less manpower is required. This is an added value in terms of safety and time reduction, especially for offshore operations in the Gulf of Mexico. In Mexico, Dopeless technology has been used successfully in offshore and onshore operations with positive results and very good feedback from operators and drilling companies,” says Luis Conde, Tenaris Technical Sales Manager Mexico.

Tenaris Tamsa expects Dopeless technology to continue growing throughout North America as offshore operators recognize its impact on string installation reliability, rig time efficiency, well productivity and HSE. The following four case studies demonstrate the benefits gained in these areas.


A major operator in the US used Dopeless connections successfully in a deepwater well in the Gulf of Mexico. In 6,000 feet of water, Dopeless technology ran flawlessly, avoiding re-makeups and rejects. In addition, the absence of threading and running compounds minimized the impact on the environment and ensured cleaner and safer working conditions.


In Eastern Siberia, temperatures consistently remain below zero. In this Arctic environment thread compounds freeze to the connection threads, inhibiting the possibility of removing the protectors. Given the harsh environment, the customer was looking to drill a large number of wells in a short period of time, making operational efficiency a necessity. Dopeless technology renders thread compounds superfluous making operations simpler and cleaner. Connections with the proprietary dry coating performed flawlessly in this difficult climate, with zero rejects and increased efficiency. Compared with doped connections, Dopeless technology produced more than a 25% running time savings.


A major operator experienced formation damage caused by dope in an onshore gas carbonate reservoir. The problem affected every well in the field and many remedial actions were taken to remove the contamination in the formation. The operator decided to use Blue Dopeless connections to ensure smoother downhole operations and prevent further formation damage caused by the dope. An estimated US$100,000 would have been lost if the operator had not switched to Dopeless technology.


An important oil and gas customer was drilling in a delicate habitat, home to numerous indigenous communities and rich biodiversity. In this setting, it was necessary to protect the environment, avoiding the release of potentially hazardous chemicals while cleaning, making up or breaking out pipe. The company decided to use 100% Dopeless coating on all casing, tubing and liner strings, making it the first eco-well in a jungle environment. The adoption of Dopeless technology also meant that no storage or running compounds were needed.