Non-explosive CO2-based perforation tool for oil and gas downhole operations
AssigneeSaudi Arabian Oil Company
InventorsKhalid R. Alnoaimi, Khalid M. Alruwaili
Life of this patent
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Abstract
Methods and systems for perforating a downhole formation which include attaching a CO2 perforating device to a wireline, where the CO2 perforating device may include one or more CO2 filled perforating units. The methods and systems may further include disposing the CO2 perforating device at a depth within a wellbore and detonating the one or more CO2 filled perforating units to perforate one or more surfaces selected from the group consisting of the wellbore casing, cement, and the downhole formation.
Claims20
A method for perforating a downhole formation comprising:
- attaching a CO2 perforating device to a wireline, wherein the CO2 perforating device consists of an electrical charge and one or more insulated CO2 liquid filled perforating units, and the one or more insulated CO2 liquid filled perforating units each comprise a body section and one or more burst discs along the body section, wherein the one or more burst discs are configured to burst in a burst pressure range of 30,000 psia to 40,000 psia;
- disposing the CO2 perforating device at a depth within a wellbore while maintaining the CO2 liquid, as a liquid, at a temperature of less than 30° C.;
- and
- detonating the one or more insulated CO2 liquid filled perforating units via heating of the CO2 liquid with the electrical charge to the burst pressure of the burst discs to perforate one or more surfaces selected from the group consisting of the wellbore casing, cement, and the downhole formation.
A method for perforating a downhole formation, comprising:
- disposing a well tool in a wellbore, the well tool consisting of an electrical charge and one or more insulated vessels filled with carbon dioxide liquid, while maintaining the carbon dioxide liquid, as a liquid, at a temperature of less than 30° C.;
- heating the carbon dioxide liquid via the electrical charge within the one or more insulated vessels to form high pressure carbon dioxide having a burst pressure in a range of 30,000 psia to 40,000 psia;
- rupturing burst discs that are configured to burst with the high pressure carbon dioxide;
- and
- after the rupturing ruptures the burst discs, discharging the high pressure carbon dioxide via one or more directional outlets associated with each of the one or more insulated vessels to perforate the downhole formation.
A system for perforating a downhole formation, comprising:
- a well tool disposed on a wireline, the well tool consisting of:
- one or more insulated vessels filled with carbon dioxide liquid;
- one or more directional outlets associated with each of the one or more insulated vessels;
- an electrical charge generation device configured to heat the carbon dioxide liquid to form a high pressure carbon dioxide having a burst pressure in a range of 30,000 psia to 40,000 psia;
- one or more burst discs associated with each of the one or more insulated vessels configured to rupture at the burst pressure in the range of 30,000 psia to 40,000 psia and discharge the high pressure carbon dioxide through the one or more directional outlets;
- and
- an actuation mechanism configured to activate the electrical charge generation device,
- wherein the well tool disposed on the wireline is disposed in a wellbore while maintaining the carbon dioxide liquid, as a liquid, at a temperature of less than 30° C.
Dependencies are inferred from the claim text.