Organic salt drilling fluid applicable to extended-reach wells
An extended-reach well, organic salt technology, applied in the field of organic salt drilling fluid, can solve the problems of poor rheology, poor sealing performance of organic salt drilling fluid, poor lubricity, etc., to reduce drill pipe friction and inhibit mud shale The effect of hydration, strong lubricating properties
Active Publication Date: 2016-07-13
BC P INC CHINA NAT PETROLEUM CORP +1
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The invention discloses an organic salt drilling fluid applicable to extended-reach wells.The organic salt drilling fluid comprises 1-4% of bentonite, 0.3-0.5% of sodium carbonate, 0.5-1% of sodium hydroxide, 0.3-1% of xanthan gum, 2-8% of filtrate reducer, 2-5% of nanometer plugging agent, 1-4% of plugging agent, 0.5-4% of lubricant, 40-60% of organic salt and 25-250% of inert weighting agent, wherein the nanometer plugging agent is formed by copolymerization of MAPOSS, N-isopropylacrylamide and acrylamide, the plugging agent is formed by copolymerization of N-isopropylacrylamide, acrylamide and N,N'-methylene diacrylamide, and the lubricant is formed by compounding of castor oil polyoxyethylene ether, polyethylene glycol and polyvinyl pyrrolidone.The organic salt drilling fluid applicable to the extended-reach wells has the advantages of excellent plugging performance, good lubricating property and rheological property and powerful rock debris carrying capability, thereby being particularly applicable to exploitation of the extended-reach wells.
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