Apparatus for operating a gas and oil producing well

Patent · Tue Jul 02 00:00:00 EDT 1985

OSTI ID:6359271

Wynn, S R

Apparatus is disclosed for automatically operating a gas and oil producing well of the plunger lift type, including a comparator for comparing casing and tubing pressures, a device for opening the gas delivery valve when the difference between casing and tubing pressure is less than a selected minimum value, a device for closing the gas discharge valve when casing pressure falls below a selected casing bleed value, an arrival sensor switch for initially closing the fluid discharge valve when the plunger reaches the upper end of the tubing, and a device for reopening the fluid discharge valve at the end of a given downtime period in the event that the level of oil in the tubing produces a pressure difference greater than the given minimum differential value, and the casing pressure is greater than lift pressure. The gas discharge valve is closed if the pressure difference exceeds a selected maximum value, or if the casing pressure falls below a selected casing bleed value. The fluid discharge valve is closed if tubing pressure exceeds a maximum safe value. In the event that the plunger does not reach the upper end of the tubing during a selected uptime period, a lockout indication is presented on a visual display device, and the well is held shut-in until the well differential is forced down to the maximum differential setting of the device. When this occurs, the device will automatically unlock and normal cycling will resume.

• Assignee: EDB-86-000564
• Patent Number(s): US 4526228
• OSTI ID: 6359271
• Resource Relation: Patent File Date: Filed date 18 Jan 1983; Other Information: PAT-APPL-459000
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
NATURAL GAS WELLS
CONTROL SYSTEMS
OIL WELLS
AUTOMATION
COMPARATOR CIRCUITS
VALVES
WELL RECOVERY EQUIPMENT
CONTROL EQUIPMENT
ELECTRONIC CIRCUITS
EQUIPMENT
FIELD PRODUCTION EQUIPMENT
FLOW REGULATORS
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing