Formation fluid sampling tools and methods utilizing chemical heating
First Claim
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1. A tool for expediting the downhole sampling of hydrocarbons of a formation traversed by a borehole, the tool comprising:
- a first chamber carrying a first reactant;
a second chamber separate from said first chamber and carrying a second reactant, said first reactant and second reactant chosen to generate an exothermic chemical reaction when in contact with each other;
a first port coupled to said first chamber and said second chamber; and
an injector coupled to said first port, said injector injecting heated injection fluid generated by causing said first reactant and said second reactant to react in an exothermic chemical reaction while in said tool through said first port and into one of the borehole or the formation.
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Abstract
A formation fluid sampling tool is provided with reactants which are carried downhole and which are combined in order to generate heat energy which is applied to the formation adjacent the borehole. By applying heat energy to the formation, the formation fluids are heated, thereby increasing mobility, and fluid sampling is expedited.
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Citations
34 Claims
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1. A tool for expediting the downhole sampling of hydrocarbons of a formation traversed by a borehole, the tool comprising:
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a first chamber carrying a first reactant; a second chamber separate from said first chamber and carrying a second reactant, said first reactant and second reactant chosen to generate an exothermic chemical reaction when in contact with each other; a first port coupled to said first chamber and said second chamber; and an injector coupled to said first port, said injector injecting heated injection fluid generated by causing said first reactant and said second reactant to react in an exothermic chemical reaction while in said tool through said first port and into one of the borehole or the formation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A tool for expediting the downhole sampling of hydrocarbons of a formation traversed by a borehole, the tool comprising:
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a first chamber carrying a first fluid reactant; a second chamber separate from said first chamber and carrying a second fluid reactant, said first fluid reactant and second fluid reactant chosen to generate an exothermic chemical reaction when in contact with each other; a mixer coupled to said first chamber and said second chamber which mixes said first reactant and said second reactant, wherein said mixer is located in one of said first chamber or said second chamber; and a first port coupled to said first chamber and said second chamber; and an injector coupled to said first chamber, said second chamber and said first port, said injector injecting said first fluid reactant and said second fluid reactant into one of the borehole or the formation. - View Dependent Claims (33)
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34. A downhole device for expediting the downhole sampling of hydrocarbons of a formation traversed by a borehole, the downhole device comprising:
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a first chamber carrying a first fluid reactant; a second chamber separate from said first chamber and carrying a second fluid reactant, said first fluid reactant and second fluid reactant chosen to generate an exothermic chemical reaction when in contact with each other; a third chamber coupled to said first chamber and said second chamber and containing a third reactant, wherein said first reactants comprises water, said second reactant comprises a chemical which when reacted with water will generate an acid solution, and said third reactant comprises a base; and a first port coupled to said first chamber and said second chamber; and an injector coupled to said first chamber, said second chamber and said first port, said injector injecting said first fluid reactant and said second fluid reactant into one of the borehole or the formation.
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Specification