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1.发明授权公开(公告)号：US11827837B2
公开(公告)日：2023-11-28
申请号：US16373137
申请日：2019-04-02
Inventor： Abdelmjeed Mohamed , Salaheldin Elkatatny , Mohamed Mahmoud
CPC classification number: C09K8/18 , C09K8/16 , C09K2208/34
Abstract: An drilling mud composition is described, which includes an aqueous base fluid, a viscosifier, and a weighting material. The drilling mud composition also includes an anti-sagging agent that comprises a dimethylamino methyl ester, such as methyl 5-(dimethylamino)-2-methyl-5-oxopentanoate. The anti-sagging agent may be used to prevent barite sagging, where barite is used as a weighting material. Small amounts of the anti-sagging agent may be used to maintain a low sag factor while drilling, and without causing unwanted increases in viscosity. The anti-sagging agent is effective for both vertical and inclined wellbores.
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2.发明申请公开(公告)号：US20200317981A1
公开(公告)日：2020-10-08
申请号：US16373137
申请日：2019-04-02
Inventor： Abdelmjeed Mohamed , Salaheldin Elkatatny , Mohamed Mahmoud
Abstract: An drilling mud composition is described, which includes an aqueous base fluid, a viscosifier, and a weighting material. The drilling mud composition also includes an anti-sagging agent that comprises a dimethylamino methyl ester, such as methyl 5-(dimethylamino)-2-methyl-5-oxopentanoate. The anti-sagging agent may be used to prevent barite sagging, where barite is used as a weighting material. Small amounts of the anti-sagging agent may be used to maintain a low sag factor while drilling, and without causing unwanted increases in viscosity. The anti-sagging agent is effective for both vertical and inclined wellbores.
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Patent Agency Ranking
公开(公告)号：US12173225B2
公开(公告)日：2024-12-24
申请号：US18489296
申请日：2023-10-18
Inventor： Abdelmjeed Mohamed , Salaheldin Elkatatny , Mohamed Mahmoud
Abstract: An drilling mud composition is described, which includes an aqueous base fluid, a viscosifier, and a weighting material The drilling mud composition also includes an anti-sagging agent that comprises a dimethylamino methyl ester, such as methyl 5-(dimethylamino)-2-methyl-5-oxopentanoate. The anti-sagging agent may be used to prevent barite sagging, where barite is used as a weighting material. Small amounts of the anti-sagging agent may be used to maintain a low sag factor while drilling, and without causing unwanted increases in viscosity. The anti-sagging agent is effective for both vertical and inclined wellbores.
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公开(公告)号：US11447395B2
公开(公告)日：2022-09-20
申请号：US16146141
申请日：2018-09-28
Inventor： Abdelmjeed Mohamed , Mohamed Mahmoud , Salaheldin Elkatatny , Abdullah Sultan
Abstract: Method of converting calcium bentonite to sodium bentonite that is suitable for use as drilling mud or a cement additive. The method comprises preparing a suspension comprising sea water and calcium bentonite at a pH in the range of 8-11, and continuously heating and stirring the suspension for a time in the range of 12 hours to 36 hours. Additives such as soda ash and sodium salt of ethylenediamineteraraacetc acid (EDTA) may be added to the suspension to improve the properties of the product sodium bentonite.
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公开(公告)号：US11781054B1
公开(公告)日：2023-10-10
申请号：US17874756
申请日：2022-07-27
Inventor： Salaheldin Elkatatny , Salem Basfar , Abdelmjeed Mohamed
CPC classification number: C09K8/16 , C09K8/145 , C09K2208/18
Abstract: A drilling fluid formulation is provided, which includes an aqueous base fluid, a synthetic modified phyllosilicate as an anti-sagging additive, an inorganic base, and a weighting agent (e.g. barite). The synthetic modified phyllosilicate contains a clay material (e.g. smectite) and a metal selected from ruthenium, rhodium, palladium, osmium, iridium, and platinum. The synthetic modified phyllosilicate is effective in preventing barite sagging as demonstrated by low sag factor when drilling at elevated temperatures. Rheology properties of the drilling fluid including gel strength, yield point, plastic viscosity, and storage modulus are also specified.
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公开(公告)号：US11414589B2
公开(公告)日：2022-08-16
申请号：US16749418
申请日：2020-01-22
Inventor： Salaheldin Elkatatny , Abdelmjeed Mohamed , Salem Basfer
Abstract: A method of removing calcium carbonate-containing oil-based filter cake from a wellbore involving contacting the calcium carbonate-containing oil-based filter cake with a biodegradable acid solution of water, hydrochloric acid, formic acid, citric acid, a surfactant, and a glycol ether mutual solvent. The method is performed at a pressure of 200 to 400 psi and a temperature of 50 to 125° C. The method removes calcium carbonate-containing oil-based filter cake made of a water-in-oil emulsion, calcium carbonate, a primary emulsifier, a secondary emulsifier, a contamination treatment agent, a viscosity control agent, a filtration control agent. The method meets industry standard steel corrosion rates of less than 0.049 lb/ft2 per day. Also disclosed is a biodegradable acid solution of water, hydrochloric acid, formic acid, citric acid, a surfactant, and a glycol ether mutual solvent that meets OECD 301B thresholds for ready biodegradability.
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公开(公告)号：US20210222050A1
公开(公告)日：2021-07-22
申请号：US16749418
申请日：2020-01-22
Inventor： Salaheldin Elkatatny , Abdelmjeed Mohamed , Salem Basfer
Abstract: A method of removing calcium carbonate-containing oil-based filter cake from a wellbore involving contacting the calcium carbonate-containing oil-based filter cake with a biodegradable acid solution of water, hydrochloric acid, formic acid, citric acid, a surfactant, and a glycol ether mutual solvent. The method is performed at a pressure of 200 to 400 psi and a temperature of 50 to 125° C. The method removes calcium carbonate-containing oil-based filter cake made of a water-in-oil emulsion, calcium carbonate, a primary emulsifier, a secondary emulsifier, a contamination treatment agent, a viscosity control agent, a filtration control agent. The method meets industry standard steel corrosion rates of less than 0.049 lb/ft2 per day. Also disclosed is a biodegradable acid solution of water, hydrochloric acid, formic acid, citric acid, a surfactant, and a glycol ether mutual solvent that meets OECD 301B thresholds for ready biodegradability.
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