Drain hole drilling. [Method of plugging the primary wellbore and the part of the drain hole wellbore near the primary wellbore in order to recover liquid preferentially to gas]

Patent · Tue Mar 13 00:00:00 EST 1984

OSTI ID:6868840

Emery, L W

A method for enhancing the recovery of liquid products from a wellbore having at least one laterally extending drain hole wellbore extending therefrom, wherein a portion of the primary wellbore near the drain hole wellbore and a portion of the drain hole wellbore itself are completely filled with a hardenable material and the hardened material is then re-drilled leaving an outer layer of hardened material to line the primary wellbore and part of the drain hole wellbore so that gas cannot prematurely come into the primary wellbore, thereby enhancing liquid recovery by way of the unlined portion of the drain hole wellbore before any gas reaches the drain hole wellbore.

• Assignee: Atlantic Richfield Company
• Patent Number(s): US 4436165
• OSTI ID: 6868840
• Resource Relation: Patent File Date: Filed date 2 Sep 1982; Other Information: PAT-APPL-414212
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
OIL WELLS
DRAINAGE
ENHANCED RECOVERY
CEMENTING
CEMENTS
DRILLING
FLOW BLOCKAGE
GAS FLOW
LINING PROCESSES
NATURAL GAS WELLS
PLUGGING
BUILDING MATERIALS
FLUID FLOW
MATERIALS
RECOVERY
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing