This document summarizes the experience and accomplishments of a chemical engineer with expertise in elastomer formulation, manufacturing, and analysis. Some key points: - The engineer has many years of experience in the oil and gas industry developing rubber products for power sections, pump stators, and tank/pipe lining applications. - Past roles include engineering manager developing new products, conducting failure analysis, designing rubber testing, and developing cement recipes using LORD components. - The document describes work done in 2014-15 consulting for Seepex pump, where the engineer tested different rubber compositions, adhesives, and bonding processes and recommended LORD products to replace an unsuccessful existing system. Testing showed the new system achieved better adhesion and durability

1. Bringing a savvy BS Chemical Engineer with years of
experience of Elastomer/Rubber formulation,
manufacturing, and analysis to “Fit for Use”.
Oil and Gas experience with products for Power-Section
and Pump Stators, as well as Tank and Pipe Lining
applications.
1

2. Key Accomplishments
 2014-15, Materials & Process Consultant for Seepex Pump.
 Recommended LORD products and designed testing
requirements for Mr. Jeff Means of LORD.
 Replaced Thixon/Rohm & Hass system, discussed later.
2

3.  2009-11, Engineering Manager, Roper Pumps,
DuraTorque product and patent development, rubber
formulary, rubber to metal bonding, FMEA, & rubber
lab acquisition & commissioning. Installed testing for
bond retention, reducing field failures.
3

4. 4
 1999-06, Seven patent submittals for Innovative
Printing Blanket design using adhesives for bonding
rubber to metal, and plastic sleeves. Cement recipes
using LORD components for Coated Fabrics business.

5.  1995-96, Director of Technology/Operations, Tank
Lining, failure analysis of bonding field failures.
 From Michigan to Texas, to Bangkok Thailand.
5

6.  1993-95, R&D Manager, R&M, rubber lab design,
acquisition & commissioning. Installed testing for
bond retention reducing field failures.
6

7.  First of it kind, Serial #2. Copied by other companies.
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8. Continued education over the years.
8

9. SEEPEX Oil Field Stators for DRILEX
 Early 2014, SEEPEX sold DRILEX on their interest in
providing stators for their mud-motor business, to
replace stators from Roper Pumps.
 Several initial trials with rubber recipes from Trostel,
and Hexpol proved unsuccessful while bonding the
rubber with A Thixon / Rohm & Hass system.
 Stators failed early in the field and later on
dynamometer performance testing.
9

10. Kamran Mirza of SEEPEX requests help.
 July 2014, I traveled to SEEPEX to review their issues,
process, and materials.
 Tube sand blasting and phosphating are done off-site at two
different vendors.
 Adhesive coating application was found not to be consistent.
Thicknesses varied beyond and below specified levels.
 Vendor rubber recipes, physical and chemical testing
revealed these to be inadequate to perform for mud motor
stators from my experience.
10

11. Rubber Physical and Chemical Tests
11
Tensile Elongation (%)
Tensile Stress (psi)
0
500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
4,500
5,000
688080
Trostel
1830K
NBR
1831K
XHNBR
C07924-1
JK NBR
C07925-1
JK HNBR
Tensile Elongation (%) 286 256 403 471 509
Tensile Stress (psi) 1,830 2,515 4,674 3,377 4,382
TensileinPSIandElongationin
%
Original Tensile and Elongation

12. 12
0
2
4
6
8
10
12
14
16
18
20
688080
Trostel
1830K NBR 1831K
XHNBR
C07924-1
JK NBR
C07925-1 JK
HNBR
DI Water @ 190 F, 4 days 2.4 1 0.4 3.7 1.2
Brine 3% @ 190 F, 4 days 0.9 0.3 0.4 1.4 0.6
Diesel @ 190 F, 4 days 8.3 4.4 16.5 2.6 2.4
Diesel @ 275 F, 4 day 8.9 5.3 19.5 3.6 4.9
%VolumeIncrease
% Swells in DI Water, Brine, and Diesel

13. 13
0
50
100
150
200
250
688080 Trostel 1830K NBR 1831K XHNBR C07924-1 JK
NBR
C07925-1 JK
HNBR
Abrasion Value (mm3) 218 124 36 95 66
AbrasionLoss
Abrasion Value (mm3)

14. 14
0
50
100
150
200
250
300
688080
Trostel
1830K NBR 1831K
XHNBR
C07924-1 JK
NBR
C07925-1 JK
HNBR
AdhesiveStrengthinlbs
688080 Trostel 1830K NBR 1831K XHNBR
C07924-1 JK
NBR
C07925-1 JK
HNBR
Chemlok 207/6450 0 168 274 147 150
Thixon 67 0 0 0 0
Tear Strength (N/mm) 30 40 46 44 47
LORD LSR 1401180 Adhesion Oct, 2014 cure 275F, 320F XHNBR

15. 15
0
50
100
150
200
250
Primary
Adhesion in
lbs
average
failure mode
%R
Boiling
Water lbs
adhesion
average
failure mode
%R
Hot
Adhesion
Tear in lbs
@ 350F
average
failure mode
%R
C07925-1 JK HNBR 246 100 205 50 72 100
1831 K XHNBR 195 98 197 57 47 92
C07924-1 JK NBR 192 98 172 63 40 100
Adhesioninlbs,FailureModein%RubberRetention
LORD TSR 0012376 350F Cure, Aug. 2010

16. LSR 1401180 Nov. 2014
16
C07924-1 JK NBR
C07925-1 JK HNBR
1830K NBR
1831K XHNBR
0
50
100
150
200
250
300
lbspulland%coverage
207/6450
275°F
R% CP%
207/259
275°F
R% CP% 207/6450
325°F
R% CP%
207/259
325°F
R% CP%
C07924-1 JK NBR 168 96 4 148 100 0 146 93 7 130 100 0
C07925-1 JK HNBR 110 47 3 93 13 1 113 93 7 124 100 0
1830K NBR 158 98 2 152 100 0 174 97 3 150 100 0
1831K XHNBR 0 0 0 0 0 0 187 82 18 253 97 3
Primary Adhesion Two Systems Two Cures

17. 17
C07924-1 JK NBR
C07925-1 JK HNBR
1830K NBR
1831K XHNBR
0
50
100
150
200
250
300
blspulland%coverage
207/6450
275°F
R% CP%
207/259
275°F
R% CP% 207/6450
325°F
R% CP%
207/259
325°F
R% CP%
C07924-1 JK NBR 189 95 5 154 98 2 173 97 3 161 100 0
C07925-1 JK HNBR 148 88 12 189 0 0 160 83 17 196 98 2
1830K NBR 178 100 0 162 100 0 179 100 0 170 100 0
1831K XHNBR 0 0 0 0 0 0 216 90 10 254 87 8
24 Hour Heat Age @ 300F Two Systems Two Cures

18. 18
C07924-1 JK NBR
C07925-1 JK HNBR
1830K NBR
1831K XHNBR
0
20
40
60
80
100
120
140
160
lbspulland%coverage
207/6450
275°F
R% CP%
207/259
275°F
R% CP% 207/6450
325°F
R% CP%
207/259
325°F
R% CP%
C07924-1 JK NBR 0 100 0 0 67 0 0 100 0 0 100 0
C07925-1 JK HNBR 0 100 0 0 0 0 109 92 3 0 95 5
1830K NBR 0 100 0 0 100 0 0 100 0 0 100 0
1831K XHNBR 0 0 0 0 0 0 13 10 30 148 95 5
24 Hour Boiling Water Stressed Two Systems Two Cures

19. 19
0
50
100
150
200
250
Primary
Adhesion in
lbs
average
failure mode
%R
Boiling
Water lbs
adhesion
average
failure mode
%R
Hot
Adhesion
Tear in lbs
@ 350F
average
failure mode
%R
C07925-1 JK HNBR 246 100 205 50 72 100
1831 K XHNBR 195 98 197 57 47 92
C07924-1 JK NBR 192 98 172 63 40 100
Adhesioninlbs,FailureModein%RubberRetention
LORD TSR 0012376 350F Cure, Aug. 2010

20. 20
C07924-1 JK NBR
C07925-1 JK HNBR
1830K NBR
1831K XHNBR
0
20
40
60
80
100
120
140
160
lbspulland%coverage
207/6450
275°F
RC% CP%
207/259
275°F
RC% CP% 207/6450
275°F
RC% CP%
207/259
275°F
RC% CP%
C07924-1 JK NBR 47 100 0 40 90 10 24 100 0 88 100 0
C07925-1 JK HNBR 22 0 77 87 100 0 30 0 87 85 100 0
1830K NBR 37 0 93 37 85 0 37 0 100 42 33 0
1831K XHNBR 0 0 0 0 0 0 150 0 17 74 100 0
12 Hour Autoclave @ 300F Unstressed

21. Summary to Date
 Three cures temperatures were evaluated. The higher
the better.
 Two systems were evaluated. It appears that 207/259
provides the best adhesion under various
environmental conditions.
 SEEPEX is selling stators to DRILEX using JK NBR and
207/6450 adhesive. These have passed stall and
performance dynamometer testing and field service.
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