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US 11,306,555 B2Granted
Drill pipe with dissolvable layer
AssigneeSaudi Arabian Oil Company
InventorIbrahim Abdullah Althowiqeb
Life of this patent
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Abstract
Presented herein are apparatus and methods that alleviate incidence of stuck pipes in downhole environments. In some embodiments, the apparatus and methods described herein include a drill pipe for drilling operations including: a dissolvable layer deposited on a portion of an outer surface of the drill pipe; and a tunnel connected to the dissolvable layer.
Claims22
A drill pipe for drilling operations, the drill pipe comprising:
- a top portion;
- a bottom portion;
- a center portion disposed between the top portion and the bottom portion;
- a dissolvable layer deposited on an outer surface of the center portion;
- and
- a tunnel extending longitudinally along the length of the center portion and fluidly connecting the top portion to the dissolvable layer,
- wherein the tunnel is disposed on the outer surface of the drill pipe, and within the
- dissolvable layer, so that the tunnel is in contact with the dissolvable layer.
5 more elements
A method for alleviating incidence of stuck pipe events, the method comprising:
- deploying a drill pipe in a downhole environment, the drill pipe comprising:
- a dissolvable layer deposited on a portion of an outer surface of the drill pipe, the dissolvable layer comprising CaCO3;
- and
- a tunnel connected to the dissolvable layer,
- initiating a drilling process;
- stopping the drilling process;
- and
- dissolving the dissolvable layer by supplying a dissolving solution through the tunnel, the
- dissolving solution comprising hydrochloric acid (HCl),
- wherein carbon dioxide (CO2) gas is released as a result of dissolving the dissolvable layer, thereby increasing the pressure within the downhole environment, and
- wherein the drill pipe becomes unstuck without having to deploy any tooling in the downhole environment.
8 more elements
Dependencies are inferred from the claim text.