(12) United States Patent (10) Patent N0.2 US 8,673,825 B2 Rayborn, Sr
US008673825B2 (12) United States Patent (10) Patent N0.2 US 8,673,825 B2 Rayborn, Sr. et a]. (45) Date of Patent: *Mar. 18, 2014 (54) DRILLING FLUID ADDITIVE WITH LOW (58) Field of Classi?cation Search FREEZING POINT None See application ?le for complete search history. (75) Inventors: Jerry Rayborn, Sr., Franklinton, LA (US); Dan M. DeLaRosa, Coral Springs, (56) References Cited FL (Us) US. PATENT DOCUMENTS (73) Assignee: Mudmasters Group, LLC, NeW 2,771,138 A “H956 Beeson Or1eanS,LA (Us) 3,960,832 A 6/1976 Kang 3,979,303 A 9/1976 Kang ( * ) Notice: Subject to any disclaimer, the term of this 4,186,025 A 1/1980 Kang patent is extended or adjusted under 35 2 1?; 80X , , 9X USC' 1540’) by 0 days' 4,375,512 A 3/1983 Rickman This patent is subject to a terminal dis- 4,393,089 A 7/1983 COX laimer 4,456,714 A 6/1984 COX C ' 4,464,410 A 8/1984 COX 4,468,334 A 8/1984 COX (21) Appl.No.: 13/507,065 4,483,782 A 11/1984 Cox 4,483,848 A 11/1984 COX (22) Filed: Jun. 1, 2012 4,506,044 A 3/1985 CoX 5,106,517 A * 4/1992 Sheu et a1. .................. .. 507/110 . 5,110,484 A 5/1992 Shou (65) Prior Publication Data 5,330,005 A 7/l994 Card Us 2012/0289435 A1 Nov. 15,2012 5439055 A 8/1995 Card 5,501,275 A 3/1996 Card _ _ 5,882,713 A 3/1999 Eskins Related US.
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