David F Trahan

US Patent:

7855171, Dec 21, 2010

Filed:

Oct 16, 2008

Appl. No.:

12/288149

Inventors:

David O. Trahan - Lafayette LA, US

International Classification:

C11D 7/36
C11D 3/30

US Classification:

510188, 510247, 510222, 510228, 510288, 510363, 510401, 510431, 510435, 510436, 510467, 510480

Abstract:

The present invention comprises an iron complexing mixture and method of using same wherein beneficial performance and natural gas pipeline cleaning methods are employed. The synergistic improvement of combining two water-soluble metal complexing agents, THPS and IDS, prove to offer advantages in performance over the individual use of either chemical.

US Patent:

20070152191, Jul 5, 2007

Filed:

Dec 29, 2005

Appl. No.:

11/323838

Inventors:

David Trahan - Lafayette LA, US
Joseph Neathamer - Gretna LA, US

International Classification:

C09K 3/00

US Classification:

252388000

Abstract:

In general the current invention relates to corrosion inhibitors useful in water-based (aqueous) heat transfer fluids. More particularly, the present invention can be used for protecting ferrous and non-ferrous metal surfaces used in the construction of water-based (aqueous) heat transfer systems such as engine blocks and radiators. The invention particularly applies to a blend of corrosion inhibiting agents that can be added to water or water-glycol or other suitable liquid in a circulating or static heat transfer system to protect metal surfaces from corrosion attack. When used in an aqueous solution the unique blend of corrosion inhibiting agents provides flash corrosion protection of ferrous and non-ferrous surfaces during operation and after the treated aqueous fluid is drained away provides atmospheric corrosion protection of the ferrous and non-ferrous surfaces. The invention further relates to a variety of other practical and industrial applications such as engine coolant corrosion inhibition, dyno fluid corrosion inhibition, and metal working corrosion inhibition applications. The corrosion inhibitor includes several components 1) a dicarboxylic acid component comprising decanedoic and dodecanedoic and one or more C10-C12 dicarboxylic acids or salts of these acids, 2) an oxyalkylated carboxylate imidazoline preferably produced from carboxylate fatty acid and amine, 3) organophosphonic acid or amine salts of the organophosphonic acid and 4) a secondary or tertiary alkanolamine organic acid salting agent. The corrosion inhibitors of the present invention provide improved corrosion protection as compared to conventional inhibitors and provide surprisingly improved corrosion protection as compared to inhibitors containing only a single mono-carboxylic acid or blend of monocarboxylic and dicarboxylic acids or salts of these acids. The corrosion inhibitor of the present invention preferably contains no nitrite, nitrate, or silicate salts.

US Patent:

20110152153, Jun 23, 2011

Filed:

Dec 17, 2010

Appl. No.:

12/928777

Inventors:

David O. Trahan - Lafayette LA, US

International Classification:

C11D 7/60

US Classification:

510188

Abstract:

The present invention comprises an iron complexing mixture and method of using same wherein beneficial performance and natural gas pipeline cleaning methods are employed. The synergistic improvement of combining two water-soluble metal complexing agents, THPS and IDS, prove to offer advantages in performance over the individual use of either chemical.

US Patent:

50452193, Sep 3, 1991

Filed:

Nov 22, 1988

Appl. No.:

7/275201

Inventors:

David O. Trahan - Abbeville LA
Michael B. Faulk - Kaplan LA

Assignee:

Coastal Mud, Incorporated - Abbeville LA

International Classification:

C09K 702

US Classification:

252 851

Abstract:

The composition of matter and application thereof in the present invention relates to the application of a synthetic hydrocarbon compound, a polyalphaolefin liquid, blended in various concentrations with chemical oil and water emulsifiers, thinners and oil and water surface tension reducers, the concentration of polyalphaolefin liquid to that of the remaining portion of the blend being no less than 5%; blending the polyalphaolefin liquid and the emulsifiers in a blending tank containing water base drilling mud; circulating the blend of polyalphaolefin liquid and emulsifier with the water base drilling mud down hole, so that the blend of polyalphaolefin liquid emulsifier and water base drilling mud lubricates the drill string or reduces the differential pressure between the wall of the borehole and the drill string so that the drill string is free to rotate and drilling may be undertaken with less drag or torque. In another application, the polyalphaolefin blended with the emulsifier serves as a spotting fluid in order to unstick drill pipe that has become stuck.

US Patent:

48760170, Oct 24, 1989

Filed:

Jan 19, 1988

Appl. No.:

7/145149

Inventors:

David O. Trahan - Abbeville LA
Michael B. Faulk - Kaplan LA

International Classification:

C09K 706
C09K 702
E21B 3103

US Classification:

252 851

Abstract:

Composition of matter in the present invention relates to the application of a synthetic hydrocarbon compound, such as a polyalphalolefin, which may be combined with emulsifiers and thinners (functional additives), at a ratio of approximately 9:1, to serve as a downhole lubricant which is non-toxic and presents no destruction to marine life. In addition, the polyalphalolefin may be used at a higher ratio of the polyalphalolefin to functional additives, to function as a spotting fluid for the removal of lodged tools downhole, exhibiting the same non-toxic qualities as when it is utilized as a lubricant.

US Patent:

20220408743, Dec 29, 2022

Filed:

Jun 24, 2022

Appl. No.:

17/849208

Inventors:

David O. Trahan - Lafayette LA, US
Richard E. Trahan - Lafayette LA, US

International Classification:

A22C 29/02

Abstract:

A novel method for automated extraction of crawfish tail meat comprises placing cooked crawfish on a tray having a bottom slot, applying a downward pressure to the cooked crawfish, extending a rotating brush through the bottom slot to urge the cooked crawfish into a horizontally exposed position, extending a rotating blade through the bottom slot to an incision, then applying a vacuum force to the bottom slot simultaneous to an increase in the downward pressure, causing the cooked crawfish to bulge and the tail meat to be extracted through the slot, after which the carcass is ejected. A plurality of trays can either be rotated in a circular path or conveyed along a linear path above the various tools as cooked crawfish are loaded and carcasses are ejected.

US Patent:

20200399531, Dec 24, 2020

Filed:

Jan 22, 2019

Appl. No.:

16/963115

Inventors:

David O. TRAHAN - Lafayette LA, US
Jia Li - Lafayette LA, US

International Classification:

C09K 8/88
C09K 8/60
C09K 8/66
C09K 8/68
C09K 8/84

Abstract:

Systems and methods include using a fracture fluid downhole for fracturing a formation. The method includes providing an aqueous solution comprising dissolved solids at a certain ionic strength, and adding a proppant to create a fracture fluid. The method continues by adding a polymeric additive and a surfactant to the fracture fluid, wherein the polymeric additive comprises friction reducing capabilities that can be decreased by the ionic strength present in the fracture fluid (i.e., ionic strength originally found in the water). The addition of the polymeric additive and the surfactant to the fracture fluid creates an enhanced fracture fluid, wherein the surfactant increases the performance of the friction reducing capabilities of the polymeric additive in the enhanced fracture fluid, which provides a more efficient fracturing operation. The method concludes by pumping the enhanced fracture fluid downhole for a more efficient fracture of the formation.

US Patent:

20200254415, Aug 13, 2020

Filed:

Feb 7, 2020

Appl. No.:

16/785253

Inventors:

David O. Trahan - Lafayette LA, US
Srinivasan Ambatipati - Lafayette LA, US

International Classification:

B01J 10/00
B01J 4/00
B01J 19/00
C07C 29/152
B01D 3/06
B01D 5/00

Abstract:

A system and method of continuous production of methanol is disclosed utilizing enriched syngas and a homogenous liquid catalyst comprising an organo-nickel compound, an ether solvent, and an organic methoxide salt. The syngas is directed into a reaction chamber in such a way as to maximize the gas-liquid interface (e.g., an eductor nozzle or bubble column) while two condensers receive tail gas and reactant fluid from the reaction chamber, the latter after undergoing flash separation. Liquid catalyst is recovered and recycled back into the system via the second condenser.