Method of using shaped compressed pellets in treating a well
First Claim
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1. A method of inhibiting or controlling the rate of release of a well treatment agent in a well during production of fluids from the well, the method comprising:
- (a) introducing into the well a shaped pellet produced by compressing a mixture into a desired shape, the mixture comprising a (i) binder and (ii) a composite of a well treatment agent adsorbed onto a water-insoluble adsorbent wherein the surface area of the adsorbent of the well treating composite is between from about 1 m2/g to about 100 m2/g and wherein the binder holds the composite together during compression of the mixture; and
(b) releasing the adsorbed well treatment agent from the composite into produced fluids within the well.
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Abstract
Shaped particulates which have been compressed from a composite of a well treatment agent and adsorbent in a matrix may be introduced into horizontal or deviated oil or gas wells. The well treatment agent of the shaped pellets may be used to prevent and/or control the formation of deposits in a production well.
72 Citations
25 Claims
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1. A method of inhibiting or controlling the rate of release of a well treatment agent in a well during production of fluids from the well, the method comprising:
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(a) introducing into the well a shaped pellet produced by compressing a mixture into a desired shape, the mixture comprising a (i) binder and (ii) a composite of a well treatment agent adsorbed onto a water-insoluble adsorbent wherein the surface area of the adsorbent of the well treating composite is between from about 1 m2/g to about 100 m2/g and wherein the binder holds the composite together during compression of the mixture; and (b) releasing the adsorbed well treatment agent from the composite into produced fluids within the well. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method of inhibiting or controlling the formation of unwanted deposits in a deviated well by:
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(a) introducing into tubing within the well a shaped pellet produced by compressing a mixture into a desired shape, the mixture comprising a binder and a composite of a well treatment agent adsorbed onto a water-insoluble adsorbent wherein the surface area of the adsorbent is between from about 1 m2/g to about 100 m2/g and further wherein the binder holds the composite together during compression of the mixture; (b) flowing the shaped pellet over obstructions within the tubing and deviations in the well into a targeted area in the well where deposits are undesired and where hydrocarbons within the well are unable to flow; and (c) continuously releasing from the shaped pellet the well treatment agent in the targeted area. - View Dependent Claims (23)
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24. A method of inhibiting or controlling the formation of unwanted deposits in a producing well by:
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(a) introducing into tubing within the well a receptacle containing a spherical pellet of a mixture of (i) a binder and (ii) a composite of a well treatment agent adsorbed onto a water-insoluble adsorbent wherein the surface area of the adsorbent is between from about 1 m2/g to about 100 m2/g, the spherical pellet having been prepared by compressing the mixture into a sphere wherein, during compressing the binder holds the composite together; (b) lowering the receptacle to a targeted area in the well where deposits are undesired; and (c) continuously releasing from the adsorbent the well treatment agent in the targeted area, wherein the amount of well treatment agent released from the adsorbent into the well is from about 0.05 to about 5 weight percent based on the total weight of produced fluid. - View Dependent Claims (25)
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Specification