WELL SCREEN ASSEMBLY

• Main Author: SETTERBERG, JOHN RICHARD, JR
• Format: Patent
• Language: English; French
• Published: 11.06.2013
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

A method and apparatus for assembling a wellscreen (50) onto a perforated base pipe (52) are provided. The wellscreen defines a tubular body which is suitable for subterranean use in oil, gas, and water wells. In accordance with the present invention, the wellscreen first defines a perforated base pipe having termination members (66) at its opposite ends. Disposed on each termination member is a continuous helical, step-tiered surface (72). The helical surface serves as a support surface for a layer of filtering material (74) which is rolled around the base pipe. The filtering material is pre-cut to a correct diameter and bias to match the diameters and bias of the spiralling termination support surfaces. The filtering material is connected to the rings to form a substantial seal on the opposite ends. A protective, perforated outer shroud is optionally disposed around the filtering media as well.