Method for treatment of drill cuttings
The present invention pertains to a process for treating drill cuttings. The process involves mixing the drill cuttings with an aqueous emulsion comprising one or more oil-liquid membranes surrounding a nano scale compound comprising iron, magnesium, or both. The weight ratio of emulsion to water is from about 1:150 to about 1:3000 and the volume ratio of water to drill cuttings is from about 40:60 to about 70:30. The treated drill cuttings can then be removed.
1. A process for treating drill cuttings from an oil or gas operation wherein the process comprises:
mixing the drill cuttings with an aqueous emulsion comprising one or more oil-liquid membranes surrounding a nano scale compound comprising iron, magnesium, or both wherein the weight ratio of emulsion to water in the aqueous emulsion is from about 1:150 to about 1:3000 and wherein the volume ratio of water to drill cuttings is from about 40:60 to about 70:30; and
removing the treated drill cuttings.
2. The process of claim 1 which further comprises removing at least a substantial portion of any floating hydrocarbons.
3. The process of claim 1 wherein the mixing is conducted such that the drill cuttings are not subjected to air.
4. The process of claim 1 wherein the time of contacting and mixing is from about 1 minute to about 30 minutes.
5. The process of claim 1 wherein the process further comprises supplying an oxidizing agent to the during or subsequent to removing of the treated drill cuttings.
6. The process of claim 5 wherein the oxidizing agent is oxygen.
7. The process of claim 6 wherein the oxygen is supplied by applying a feed of air, ozone, peroxide, or other oxygen containing gas.
8. The process of claim 5 wherein the oxidizing agent is selected from the group consisting of metal salts of chromates, dichromates, chlorates, perchlorates, and nitrates, perborates; perchloric acid; hydrogen peroxide; salts of hypochlorite, permanganate, and peroxide; sodium permanganate; chromium trioxide; halane; nitric acid; ammonium dichromate; potassium chlorate; calcium hypochlorite; sodium chlorate; perchloric acid; sodium chlorite; potassium bromate; ammonium perchlorate; ammonium pernitrate; potassium superoxide; and mixtures thereof.
9. The process of claim 1 wherein the process is conducted on a continuous basis.
10. The process of claim 1 wherein the process is conducted on a batch basis.
11. The process of claim 1 wherein the treated drill cuttings comprise less than about 300 ppm chlorides.
12. The process of claim 1 which further comprises treating said removed hydrocarbons to form a dry filter cake.
13. The process of claim 12 which further comprises injecting said dry filter cake into a salt water disposal well.