Saudi Arabian Oil Company

Amjad Alsharaawi

Richard Mark Pye

Zahrah Al Marhoon

Ala Edeen Herzallah

A method includes setting a primary plug within a wellbore flowpath defined through a radially innermost casing string of a plurality of concentric casing strings, operating a laser milling tool within the wellbore flowpath to discharge a laser beam into the wellbore flowpath to thereby mill a window through the radially innermost casing string and radially outward towards a radially innermost cement column of a plurality of respective cement columns surrounding each of the concentric casing strings, discharging an abrasive fluid from an abrasive jetting tool into the wellbore flowpath and cleaning out the radially innermost cement column to expand the window radially, flowing a secondary plug material into the window and the wellbore flowpath above the primary plug, solidifying the secondary plug material to form a solidified secondary plug within the window, and drilling out the solidified secondary plug to restore the wellbore flowpath through the solidified secondary plug.

Laser milling system for concentric casing string cement repair

A wellbore system includes a drill string extending into a main wellbore and an untethered cutting tool disposed within the drill string. The untethered cutting tool includes at least one cutting element operable to sever the drill string such that an upper portion of the drill string may be withdrawn from the wellbore. A sidetrack tool is integrally coupled to an upper end of the untethered cutting tool. The sidetrack tool may include at least one of a whipstock, a whipstock latch, and a cement plug cup. The sidetrack tool may facilitate drilling a sidetrack wellbore by limiting the number of trips into the main wellbore.

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Dhahran, Saudi Arabia

Amjad Alsharaawi