Dopeless ® technology Quantifying the benefits Tomás Castiñeiras Dopeless® Technology Project Manager Julie Mathis Technical Sales Manager USA

2 Dopeless ® technology. Experienced. Efficient. Environmental. The coating is applied in a fully automatic process, assuring that the exact amount of the lubricant required by each connection is distributed in a controlled and uniform way on its surface. The process is carried out on dedicated production lines at Tenaris mills and facilities on four continents. Dopeless ® technology turns thread compounds obsolete and eliminates grease and cleaning solvents that are usually used during pre-running preparations. Dopeless ® technology is a dry, multifunctional coating applied to TenarisHydril premium connections in the mill.

3 Benefits of Dopeless ® technology Improved operational performance Time: Running times reduced in the order of 25% Reliability: Nearly 0 re-makeups and rejects Offshore Savings: 10% savings on total pipe cost Health, Safety and Environment: Zero discharge and minimal risk

4 Expanding production and service capabilities To meet the increasing demand for Dopeless ® technology, Tenaris has dedication production lines at its mills worldwide: –Campana, Argentina –Veracruz, Mexico –Cilegon, Indonesia –Dalmine, Italy –Zalau, Romania –Houston, USA **starting operations in July 2012 Dopeless ® technology production lines Dopeless ® technology accessories and repair units

5 Dopeless technology availability Blue ® Series, Wedge Series 500 TM, Wedge Series 600 TM and ER TM connections. Carbon, Chrome and CRA grades. Size range: 2 3/8 ” – 24 ½ ”.

6 Customer experience Customer: US Independent Operator Dopeless ® technology used in four: Deepwater Gulf of Mexico – High Cost environment. Wedge 523TM and Blue ® Dopeless ® connections. Increased efficiency. Offshore Equatorial Guinea – Landing string. Wedge 563 TM Dopeless ® connections coupled with production tubing in L80Cr13 Blue ® Dopeless ® connections. Reliability. Offshore Mediterranean Sea. Wedge 523 Dopeless ® connections with large ODs. Robustness and efficiency. Shales US – HT/HP environment. Wedge Series 563 TM Dopeless ® connections. Robust, reliable performance.

7 Extreme reliability in the Gulf of Mexico Zero rejects using integral Wedge 523™ and Wedge 521™ Dopeless ® connections in 9 onshore and offshore wells. Reliability Faster, more consistent make-up process saves time and money. Efficiency Less cleaning and handling operations make the rig safer. HSE

8 Case 1: Snohvit project, Norway Subsea gas well inside the Arctic circle Dope freezes in sub-zero temperatures Strict environmental regulations 100% Dopeless ® technology well 7 years of ongoing reliability, flawless performance

9 Relieving problems of formation damage Laboratory tests have shown the following: Dope is exuded inwards and outwards of the connection. A solution / suspension is formed. Tenaris demonstrated through lab analysis that these chemicals can create both skin damage and formation damage. Damage reaches a permeability reduction of up to 99% in some cases.

10 Relieving problems of formation damage

11 Relieving problems of formation damage Bidón 1 Bidón 5 Bidón 9 Bidón 2 Bidón 6 Bidón 10 Bidón 3 Bidón 7 Bidón 11 Bidón 4 Bidón 8 Bidón 12