Granted Patent
B2
US 12,655,341 · App. 17/545,867 · Granted Jun 16, 2026
Two component low density gel for the protection of electrical components from corrosion in oil and gas wells
Assignee:
Saudi Arabian Oil Company
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Abstract
Methods for making a low-density gel or composite in a wellbore are provided. An exemplary method includes injecting a sealer component including a low-density material into the wellbore, allowing the sealer component to float to the top of an oil column, injecting an activator component including another low-density material into the wellbore, allowing the activator component to float to the top of the oil column and contact the sealer component, and contacting the sealer component and the activator component to form a gel.
Claims (20)
1 . A method for making a low-density gel in a wellbore, comprising:
injecting a sealer component comprising a low-density material into the wellbore, wherein the sealer component has a density that is about 1 to about 5 kg/m 3 less than the density of oil present in the wellbore;
after the injecting the sealer component, allowing the sealer component to float to the top of an oil column;
after the allowing the sealer component to float to the top of the oil column, injecting an activator component comprising another low-density material into the wellbore, wherein the activator component has a density that is about 3 to about 10 kg/m 3 less than the density of the oil;
after the injecting the activator component, allowing the activator component to float to the top of the oil column and contact the sealer component; and
contacting the sealer component and the activator component to form a gel.
2 . The method of claim 1 , wherein a density of both the sealer component and the activator component is less than 790 kg/m 3 .
3 . The method of claim 1 , wherein at least one of the sealer component or the activator component further comprises a foaming surfactant.
4 . The method of claim 3 , wherein the foaming surfactant comprises one or more of sodium dodecyl sulfate, cocamidopropyl hydroxysultaine, a primary alcohol ethoxylate (PAE) surfactant, an alkylphenol ethoxylate (APE) surfactant, a secondary alcohol ethoxylate (SAE), a nonylphenol ethoxylate (NPE), an octylphenol ethoxylate (OPE), or an ethylene oxide/propylene oxide (EO/PO) copolymer.
5 . The method of claim 1 , wherein the sealer component comprises a crosslinkable polymer, and wherein the activator component comprises a crosslinker.
6 . The method of claim 5 , wherein the crosslinkable polymer comprises one or more of guar, hydroxypropyl guar (HPG), carboxymethyl guar (CMG), carboxymethyl hydroxypropyl guar (CMHPG), polyacrylamide or copolymers thereof, hydroxyethyl cellulose, and hydroxypropyl cellulose.
7 . The method of claim 1 , wherein the sealer component comprises a curable resin, and wherein the activator component comprises a curing agent.
8 . The method of claim 7 , wherein the curable resin comprises one or more of an epoxy resin, a phenolic resin, or a furan resin.
9 . The method of claim 1 , wherein the low-density material comprises rigid spheres.
10 . The method of claim 9 , wherein the rigid spheres comprise microbubbles.
11 . The method of claim 10 , wherein the microbubbles are glass microbubbles.
12 . The method of claim 1 , wherein the sealer component comprises colloidal nanosilica and the activator component comprises a diglycidyl ether.
13 . The method of claim 1 , wherein the sealer component comprises colloidal nanosilica and the activator component comprises a salt or acid with a pH of less than 7.
14 . The method of claim 1 , comprising allowing the sealer component to surround an electric component at the top of the oil column.
15 . The method of claim 14 , comprising forming the gel to form around the electric component.
Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Dec 10, 2021
From: ALISSA, FAISAL MOHAMMED; KALGAONKAR, RAJENDRA ARUNKUMAR
To: SAUDI ARABIAN OIL COMPANY
Reel/Frame 058357/0110 →
Continuity (1)
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