Method for Recovering Hydrocarbons from Subterranean Formations

a technology of hydrocarbon recovery and subterranean formations, applied in the direction of fluid removal, borehole/well accessories, insulation, etc., to achieve the effect of limiting the damage potential of surface water zones, and minimizing damage to near surface water zones

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a technology of hydrocarbon recovery and subterranean formations, applied in the direction of fluid removal, borehole/well accessories, insulation, etc., to achieve the effect of limiting the damage potential of surface water zones, and minimizing damage to near surface water zones

US20060175061A1Inactive Publication Date: 2006-08-10CRICHLOW HENRY B

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[0125] Referring now to the drawings wherein like reference numerals designate corresponding elements throughout all the figures and referring in particular to FIG. 1. an improved method for extracting hydrocarbons according to an example embodiment of the invention includes a wellbore 1 consisting of three primary sections. As shown in steps 100, 101, 102, in FIG. 13 and in FIG. 1, a downward section 6, a lateral section 7 and an upward section 8 are drilled with conventional oilfield equipment. The downward section 6 has an entry wellhead 4 and is more or less vertically drilled depending on the nature of the recovery operations. Within the scope of this description a horizontal well or horizontal well section means a well or well section, which is substantially at or close to horizontal inclination. The horizontal or lateral section 7 is drilled in the producing oil formation 23, which is a porous medium containing oil, gas and water in the pore spaces. The upward section 8 is a...

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Abstract

Recovery of viscous hydrocarbon from subterranean formations is assisted by using a plurality of novel U-tube type wells, each with dual wellheads, a moveable wellbore packer, a lateral section with a concentric communication zone and with sequential injection production perforations in which heat is injected into the proximal perforations and hot oil and produced fluids are produced from the distal perforations, the whole process being controlled by modulating the production flow where the wellbore fluids are controlled to act as a hydraulic seal to limit bypass of injected fluids. The injection-production displacement process moves axially along the wellbore in a sequential manner as hydrocarbon volumes are depleted by injected fluid displacement of oil and oil and water production.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application claims priority from provisional application 60 / 712,289 filed Aug. 30, 2005 and Disclosure Document 521,535 by Dr. Henry Crichlow.INTRODUCTION [0002] This invention relates generally to a new technology application and a new type of oil well for recovery of viscous hydrocarbons from subterranean oil bearing formations. The technology involves the novel use and application of equipment and techniques in which horizontal wells are drilled from the surface down to and across an oil bearing formation and back up to the surface, in a manner similar to that of drilling under a river crossing when laying pipelines across country. This new type of horizontal well is called a Uniwell™ because it has two surface wellheads one at each end of the axis of the horizontal system. Either wellhead can be used for either injection or production as needed by the operator. [0003] The technology is a new application using some elements of a...

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Application Information

Patent Timeline

10 Aug 2006

Publication

US20060175061A1

IPC: E21B43/24

CPC: E21B43/2406; E21B43/2408; E21B43/305

Inventors: CRICHLOW, HENRY B.