Patent ID: 11933169
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 0:
1. A well system, comprising:
a wellbore extending from a well surface location and penetrating a subterranean formation, the wellbore being filled with a wellbore fluid; and
a coring tool untethered from the well surface location and conveyable to a bottom of the wellbore under gravitational forces, the coring tool including:
an electronics section that includes a buoyant material that is buoyant in the wellbore fluid;
a coring section coupled to the electronics section and including a sidewall coring unit operable to penetrate an inner wall of the wellbore and thereby obtain a core sample; and
a weight section operatively coupled to the electronics and coring sections at a release mechanism,

wherein an elongated weight of the weight section overcomes buoyancy forces generated by the buoyant material in the wellbore fluid and engages the bottom of the wellbore to define a stand-off distance between the bottom of the wellbore and the sidewall coring unit, and
wherein activating the release mechanism detaches the weight section and allows the electronics and coring sections to float to the well surface location.