Boring or penetrating the earth – With signaling – indicating – testing or measuring – Indicating – testing or measuring a condition of the formation
Reexamination Certificate
2006-02-14
2006-02-14
Suchfield, George (Department: 3676)
Boring or penetrating the earth
With signaling, indicating, testing or measuring
Indicating, testing or measuring a condition of the formation
C073S152430, C166S292000, C166S294000, C175S040000, C175S064000, C175S072000, C507S127000, C507S129000, C507S137000, C507S138000, C507S145000
Reexamination Certificate
active
06997270
ABSTRACT:
A method is disclosed that affords improved stability to wellbores during drilling in argillaceous formations with water-based drilling fluids. The method comprises adding to the drilling fluid a compound of the invention having the capacity in water to generate a highly efficient membrane on argillaceous materials. The compound is soluble in the drilling fluid at least at the pH at which the compound is added to the drilling fluid or exists in the drilling fluid, but is insoluble in the water in the pores of the argillaceous formations, or at least at the pH of the water in such pores.
REFERENCES:
patent: 2481545 (1949-09-01), Wagner et al.
patent: 2726207 (1955-12-01), Healey
patent: 2789949 (1957-04-01), Scotty
patent: 2868726 (1959-01-01), Brukner et al.
patent: 2896915 (1959-07-01), Weiss et al.
patent: 3628615 (1971-12-01), Chenevert
patent: 3640343 (1972-02-01), Darley
patent: 5925598 (1999-07-01), Mody et al.
patent: 2004/0123985 (2004-07-01), Whitfill et al.
patent: WO 96 04349 (1996-02-01), None
L. Bailey, B. Craster, “New Insight into the Mechanisms of Shale Inhibition Using Water-Based Silicate Drilling Fluids,” IADC/SPE Paper 39401. Proceedings of the Drilling Conference, Dallas USA, Mar. 3-6, 1998, pp. 897-906, and particularly, p. 897, left-hand column and p. 906, right-hand column and also the Conclusions paragraph.
C.P. Tan, S.S. Rahman, “Integrated Approach to Drilling Fluid Optimisation for Efficient Shale Instability Management,” SPE Paper 48875, Proceedings of SPE International Oil and Gas Conference and Exhibition in ChinaBejing, Nov. 2-6, 1998, pp. 441-456, especially p. 442; Also, cited in the Applicants' specification.
Rui D et al., “Soluble-Silicate Mud Additives Inhibit Unstable Clays,” 94(14) Oil and Gas Journal 66-68, Pennwell Publishing Co., Tulsa, Oklahoma, Apr. 1, 1996. Alt.
Mody, F.K, et al, “A Borehole Stability Model to Couple the Mechanics & Chemistry of Drilling Fluid Interaction,” Proc. SPE/IADC Drilling Conf., Amsterdam, pp 473-490 (1993).
Van Oort, et al., “Manip. of Coupled Osmotic Flows for Stabilisation of Shales Exposed to Water-based Drilling Fluids,” Proc. 70th SPE Ann. Tech. Conf., Dallas, p 497-509 (1995).
Tan, C.P., et al., Managing Physico-Chemical Wellbore Instability in Shales with the Chemical Potential Mech, Proc. Asia Pacific Oil & Gas Conf., Adelaide, p 107-116 (1996).
Whilworth, T.M., et al., “Electrolyte-induced Solute Permeability Effects in Compacted Simectite Membranes,” Applied Geochemistry, 533-546 (1994).
Chanevert, M.E., et al., “Shale Swelling at Elevated Temperature and Pressure,” Proc. 33rd U.S. Rock Mechanics Symp., Santa Fe, pp. 869-878 (1992).
Tan, C.P., et al., “Effects of Swelling & Hydrational Stress in Shales on Wellbore Stability,” Asia Pacific Oil & Gas Conf., Kuala Lumpur, pp. 345-349 (1997).
Drummond Calum J.
Georgaklis George
Mody Fersheed K.
Pober Kenneth W.
Tan Chee P.
Commonwealth Scientific and Industrial Research Organisation
Halliburton Energy Service,s Inc.
Roddy Craig W.
Suchfield George
Tripp Karen B.
LandOfFree
Compounds and method for generating a highly efficient... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compounds and method for generating a highly efficient..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compounds and method for generating a highly efficient... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3712167