Hydraulic junk retriever

Patent · Tue Apr 18 04:00:00 EST 1978

OSTI ID:6523335

Burge, E V

A hydraulic junk retriever has a tubular mandrel for connection with a drill pipe and rotatably suspending an elongate cylindrical housing within a well bore. A flow passage in the upper end of the housing communicates with bore of the mandrel and has ports extending outward at a tangent to the cylindrical interior of the passage for jetting drilling fluid tangentially into the well bore so as to impart rotation to the housing and centrifugal force to the drilling fluid. The tangential discharge ports are downwardly inclined to direct the fluid to the bottom of the well bore. A downward opening barrel is provided by the lower portion of the housing for receiving the swirling fluid from the well-bore bottom and its upper end communicates with the well bore to permit upward reverse circulation of the fluid through the barrel which has means above its lower end to trap large debris therein. The barrel has cutting teeth at its lower end to loosen debris embedded in the well bore bottom, annular magnets within the barrel for attracting ferromagnetic debris, and means within the upper end of the barrel for screening the upward reverse circulation of fluid. Internal upright vanes in the lower portion of the barrel create a vortex by rotation of the housing so as to draw debris into the barrel from the well-bore bottom, and the cutting teeth may form lower extremities of the vanes. (9 claims)

• Assignee: EDB-83-059371
• Patent Number(s): US 4084636
• OSTI ID: 6523335
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
CIRCULATING SYSTEMS
DESIGN
DRILLING EQUIPMENT
DRILLING FLUIDS
EQUIPMENT
FLUID MECHANICS
FLUIDS
HYDRAULICS
MECHANICS