Method of using shaped compressed pellets in well treatment operations
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 by:
- (a) introducing into the well a shaped compressed pellet of a binder and a well treatment composite, the well treatment composite comprising a well treatment agent and calcined porous metal oxide wherein the porosity and permeability of the calcined porous metal oxide is such that the well treatment agent is adsorbed onto the porous metal oxide or into the interstitial spaces of the porous metal oxide, the shaped compressed pellet prepared by (i) calcining a porous metal oxide, (ii) adsorbing the well treatment agent onto the calcined porous metal oxide or into the interstitial spaces of the calcined porous metal oxide to form the well treatment composite, (iii) adding a binder to the well treatment composite, and then (iv) compressing the binder and well treatment composite into a desired shape; and
(b) releasing the well treatment agent from the compressed pellet into the well.
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Abstract
A shaped compressed pellet formed from a composite of a well treatment agent adsorbed onto a calcined porous metal oxide or into the interstitial spaces of the calcined porous metal oxide may be introduced into an oil or gas producing well. The well treatment agent of the shaped compressed pellet may be used to prevent and/or control the formation of deposits in the well.
97 Citations
23 Claims
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1. A method of inhibiting or controlling the rate of release of a well treatment agent in a well by:
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(a) introducing into the well a shaped compressed pellet of a binder and a well treatment composite, the well treatment composite comprising a well treatment agent and calcined porous metal oxide wherein the porosity and permeability of the calcined porous metal oxide is such that the well treatment agent is adsorbed onto the porous metal oxide or into the interstitial spaces of the porous metal oxide, the shaped compressed pellet prepared by (i) calcining a porous metal oxide, (ii) adsorbing the well treatment agent onto the calcined porous metal oxide or into the interstitial spaces of the calcined porous metal oxide to form the well treatment composite, (iii) adding a binder to the well treatment composite, and then (iv) compressing the binder and well treatment composite into a desired shape; and (b) releasing the well treatment agent from the compressed pellet into the well. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of inhibiting or controlling the rate of release of a well treatment agent in a well comprising:
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(a) placing into a receptacle a shaped compressed pellet of a binder and a composite of a well treatment agent adsorbed onto a water-insoluble adsorbent or into interstitial spaces of the adsorbent;
the shaped compressed pellet prepared by (i) adsorbing the well treatment agent onto the water-insoluble adsorbent or into the interstitial spaces of a porous metal oxide to form the well treatment composite, (iii) adding a binder to the well treatment composite, and then (iv) compressing the binder and well treatment composite into a desired shape; and(b) affixing the receptacle to the bottom of a bottom hole electric submersible pump by hanging the receptacle from the bottom of the bottom hole electric submersible pump; (c) lowering the bottom hole electric submersible pump with the affixed receptacle into the well; and (d) continuously releasing the well treatment agent from the water-insoluble adsorbent. - View Dependent Claims (18, 19, 20)
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21. A method of inhibiting or controlling the formation of unwanted deposits in a deviated well by:
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(a) introducing into tubing in the well a shaped compressed pellet of a binder and a well treatment composite comprising a well treatment agent and calcined porous metal oxide wherein the porosity and permeability of the calcined porous metal oxide is such that the well treatment agent is adsorbed onto the calcined porous metal oxide or into the interstitial spaces of the calcined porous metal oxide and wherein the shaped compressed pellet is produced by (i) preparing a well treatment composite by adsorbing onto the calcined porous metal oxide or into the interstitial spaces of the calcined porous metal oxide the well treatment agent;
(ii) mixing the well treatment composite with a binder; and
(iii) compressing the well treatment composite and binder;(b) flowing the shaped compressed pellet over obstructions within the tubing and deviations in the well into a targeted area in the well where unwanted deposits are undesired; and (c) continuously releasing the well treatment agent from the shaped compressed pellet into the targeted area. - View Dependent Claims (22, 23)
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Specification