THERBAN /HNBR for the Energy Sector

Transcription

1 THERBAN /HNBR for the Energy Sector Victor Nasreddine*, Kevin Kulbaba, Susanna Lieber, hristian Müeller, Brian James, Larry hen, David Gerrard, Jim Goodson. *Speaker LANXESS, FAST/DI Seals USA, BAKER HUGHES USA 2012 RUBBER ON May 14-16, Oslo Norway

2 Overview HNBR Elastomer: Product & Properties Short term aging study: Fluid Aging: IRM903, DIESEL, STEAM H 2 S Resistance Rapid Gas Decompression in O 2 & N 2 Summary 2

3 Polymer Structure NBR vs HNBR H 2 NBR Poly(acrylonitrile-butadiene) H H 2 H H H 2 H 2 H a b H c N H 2 + Oil resistance - Aging behavior Unsaturation in the main chain poor chemical and temperature stability H 2 HNBR Hydrogenated Poly(acrylonitrilebutadiene) H 2 H N H 2 H 2 H 2 H 2 H 2 H a b c H 2 + Oil resistance + Aging behavior H 3 Hydrogenation required to reduce unsaturation. direct polymerization of 2 and AN not possible! 3

4 THERBAN Performance Features HNBR Ideal polymer for oil field applications High strength Abrasion resistance Good mechanical properties at elevated temperature Very good heat resistance Good low temperature properties Excellent resistance to lubricating oils with chemically aggressive additives Low permeability to vapors & gases Good resistance to ozone Good resistance to high energy radiation Low compression set Good resistance to crude oil even in the presence of hydrogen sulfide, amines, and corrosion inhibitors 4

5 Typical properties Service Temperature, ompound density, g/cc Hardness, Shore A Ultimate Tensile, MPa Elongation, % ompression set %, 70hrs/150 Tear Strength, kn/m < Rebound resilience, % 65 DIN Abrasion, mm to 165; > 180/short term

6 Effect of RDB (Residual Double bond) Level Fully Saturated Grades Peroxide ure Partially Saturated Grades Sulfur & Peroxide ure Hot Air Resistance Ozone Resistance Lower Heat Build-up Modulus Ultimate Elongation Tear Strength

7 Effect of AN ontent 34 % 39 % 49 % AN Oil Resistance Fuel Resistance Hardness Density Lower Gas Permeability Low Temp. Flexibility Elasticity

8 Outline of ompounds (H 2 S and RGD Testing) Variation in AN, RDB, ZnO, S vs P ure and Hardness ompound Name A B D / D E / E F / F AN (%) RDB (%) 0.9 max 0.9 max 0.9 max 0.9 max ZnO (phr) P: peroxide, S: sulfur P P P P P S Hardness: ompounds A-F have ca. 90 Shore A ompounds D, E and F have ca. 70 Shore A. 8

9 Physical Properties (90 Shore A) Tensile/10, PSI Elongation, % Young's Modulus/10, PSI M100/10, PSI A B D E F 34 % AN 39 % AN 39 % AN (ZnO) 43 % AN 43 % AN 43 % AN (S-ure) < 1 % RDB 5.5 % RDB 9

10 ompression Set Peroxide vs Sulfur Improved ompression Set with Peroxide and Anaerobic Aging ompound hrs 504hrs ompound hrs 504hrs Air ASTM#1 IRM903 0 Air ASTM#1 IRM % AN, 5.5 % RDB, Peroxide ure 43 % AN, 5.5 % RDB, Sulfur ure ASTM #1 and IRM 903 help to exclude air during testing 10

11 Oil Resistance vs Low Temperature Properties Higher AN will lead to an increase in Tg but reduced swelling Tg ( ) versus AN Volume Swell (%) vs AN 0,0-5,0-10, A B D E F hrs/150 IRM903 72hrs/80 DIESEL 72hrs/175 STEAM 15-15, ,0 5-25, ,0 A B D E F Higher swelling in steam for the S-cured compound 11

12 Fluid Resistance (Immersion 3 days) More hardening for S-ured ompound with Steam 8 hange in Hardness (pts) High AN reduces swelling/ softening of compounds

13 Fluid Resistance (Immersion 3 days) 10% hange in Tensile, % 50% hange in Elongation, % 5% 40% 0% 30% 20% -5% 10% -10% 0% -15% -10% -20% -25% -20% -30% -40% -30% -50% 13

14 Hot air vs Nitrogen Aging Effects hange in Properties of 70 Shore A ompounds 20 ompound ompound Ult Tensile EB 10 Ult Tensile EB 0-10 Hardness 0-10 Hardness hrs, Air 504hrs, Air hrs, Air 504hrs, Air 168hrs, N2 168hrs, N hrs, N2 504hrs, N % AN, 5.5 % RDB, Peroxide ured 43 % AN, 5.5 % RDB, Sulfur ured Reduced aging effects under N 2 atmosphere 14

15 H 2 S Resistance Reaction with RDB may lead to crosslinking hemical Reactions with = are Possible: H 2 S + S SH Addition Reaction rosslinking Reaction an extend lifetime and upper temperature limits with HNBR 15

16 H 2 S Resistance Experimental Testing Procedure Five O-rings (214 type) of each compound were tested Gas mixture composed of: 5 % O 2 10% H 2 S 85% H 4 No liquid phase was present in the vessel The vessel was maintained at 150 and 10 MPa for 72 hours The pressure was then released at a very slow rate (avoid RGD) less than 0.15 MPa/min 16

17 H 2 S Resistance High AN and S-ure shows reduced H 2 S Resistance hg in H, pts hg in T, % hg in EB, % hg in Weight, % 34 A 39 B D 43 F P ure, < 1% RDB S ure 17

18 Rapid Gas Decompression Resistance (O 2 ) Experimental Testing Procedure Five O-rings of each of compounds A, D, and F were tested Vessel was filled with O 2 at 100, 12 MPa for 24 hours The pressure was released at a rate of 3.7 MPa/min to simulate explosive decompression test conditions. The O-rings of each compound were sectioned into two equal pieces and inspected under SEM with 50X magnification 18

19 Rapid Gas Decompression Resistance (O 2 ) Good Results (no defects observable) OMPOUND A OMPOUND D 34 AN, < 0.9 % RDB 43 AN, < 0.9 % RDB 19

20 Rapid Gas Decompression Resistance (O 2 ) Good Results (no defects observable) OMPOUND F 43 AN, sulfur cure All compounds show no defects, cracks, or damage at these conditions - very good resistance to rapid gas decompression 20

21 Rapid Gas Decompression Resistance (N 2 ) Experimental Testing Procedure / Results ASTM dumbbells of compounds A (34 % AN) and D (43 % AN) where tested in N 2 at 100, 7 MPa for 24 hours. The pressure was released at a rate of 3.7 MPa/min to simulate explosive decompression test conditions. Both compounds showed no evidence of blisters, porosity or defects. ompound AN (%) hg in Hardness, pts hg in Tensile, % hg in Elongation, % hg in volume, % A D

22 Summary Good Fluid Resistance and Rapid Gas Decompression Resistance Good high temperature aging properties for peroxide compounds Sulfur cured compounds show severe aging Reduced swelling with higher AN, but reduced low T flexibility Improved high temperature stability under Nitrogen Peroxide cured HNBR compounds display good H 2 S resistance: slight increase in aging (reduced EB) with higher AN contents All compounds displayed very good RGD properties when tested under O 2 and N 2 22

23 For more information please visit Thank you for your attention! Questions? This presentation contains certain forward-looking statements, including assumptions, opinions and views of the company or cited from third party sources. Various known and unknown risks, uncertainties and other factors could cause the actual results, financial position, development or performance of the company to differ materially from the estimations expressed or implied herein. The company does not guarantee that the assumptions underlying such forward looking statements are free from errors nor do they accept any responsibility for the future accuracy of the opinions expressed in this presentation or the actual occurrence of the forecasted developments. No representation or warranty (express or implied) is made as to, and no reliance should be placed on, any information, including projections, estimates, targets and opinions, contained herein, and no liability whatsoever is accepted as to any errors, omissions or misstatements contained herein, and, accordingly, none of the company or any of its parent or subsidiary undertakings or any of such person s officers, directors or employees accepts any liability whatsoever arising directly or indirectly from the use of this document. 23