Angle deviation tool

Patent · Tue Apr 07 04:00:00 EDT 1987

OSTI ID:6825272

Schoeffler, W N

This patent describes a drilling assembly usable downhole on fluid conducting drill strings, situated in earth boreholes for selecting straight hole or directional drilling configuration of the downhole assembly by manipulation, at the earth surface, of drilling fluid flow controls. An apparatus is described comprising: (a) a body with an upper end with connector means to attach to the upwardly continuing drill string, and a lower end with means to attach to the downwardly continuing drill string, and at least one fluid conducting channel to conduct fluid between the portions of the continuing drill string, each end of the body having an independent longitudinal centerline; and (b) control selector means within the body in communication with the channel responsive to a first preselected number of increases, greater than a preselected amount, of the fluid flow rate through the channel to produce a first output signal, and responsive to a second preselected number of increases, greater than a preselected amount, of the fluid flow rate through the channel to produce a second output signal.

• Assignee: Petro-Design, Inc., Youngsville, LA
• Patent Number(s): US 4655299
• OSTI ID: 6825272
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
BOREHOLES
CAVITIES
CONDUCTOR DEVICES
CONNECTORS
DIRECTIONAL DRILLING
DRILL BITS
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
DRILLING FLUIDS
ELECTRICAL EQUIPMENT
EQUIPMENT
FASTENERS
FLOW RATE
FLUID FLOW
FLUIDS
OIL WELLS
PIPES
SIGNALS
WELLS