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.
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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.
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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.
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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.
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6. 1993-95, R&D Manager, R&M, rubber lab design,
acquisition & commissioning. Installed testing for
bond retention reducing field failures.
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7. First of it kind, Serial #2. Copied by other companies.
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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.
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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.
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11. Rubber Physical and Chemical Tests
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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
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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