Jet device for use in wells

• US 4,197,910 A
• Filed: 03/31/1978
• Issued: 04/15/1980
• Est. Priority Date: 03/31/1978
• Status: Expired due to Term

• Current Assignee: Chevron Research Company (Chevron Corp.)
• Original Assignee: Chevron Research Company (Chevron Corp.)
• Inventors: Hutchison, Stanley O.
• Primary Examiner(s): Pate, III, William F.
• Application Number:
  US05/892,442
• Time in Patent Office: 746 Days
• Field of Search: 166/222, 166/223, 166/173, 175/422, 134/166 C, 134/167 C, 134/168 C, 134/169 C
• US Class Current: 166/223
• CPC Class Codes: E21B 37/08 cleaning in situ of down-hole filters, screens, e.g. casing perforations, or gravel packs E21B37/06 takes precedence
• CPC Class Codes: E21B 41/0078 Nozzles used in boreholes drilling by liquid or gas jets E21B7/18; drill bits with nozzles E21B10/60; perforators using direct fluid action E21B43/114; obtaining a slurry of minerals using nozzles E21B43/29

Abstract

Apparatus for jet-cleaning wells having different-diameter casing strings, which apparatus includes an elongated member for running into the well, and a movable member having a jet body for forming a jet connected to the elongated member, which movable member moves out against the casing string responsive to application of jetting liquid between the movable member and the elongated member.

Claims

1. Apparatus for use in cleaning wells comprising an elongated member adapted to be run into a well to a location where cleaning is desired, a stationary member connected to said elongated member, a movable member slidably connected to said stationary member for movement perpendicular to centerline of said elongated member in response to liquid pressure applied between said movable member and said stationary member, a jet body having a central jet-forming opening for forming a jet of liquid connected to said movable member, passageway means in said movable member forming liquid communication to said jet-forming opening and to a location between said movable member and said stationary member, a liquid inlet port providing liquid communication into said passageway means from outside said movable member and said stationary member, and at least one wheel member rotatably mounted on said movable member, said wheel member having an axis of rotation parallel to the axis of elongation of said elongated member and perpendicular to said stationary member and having sufficient diameter to extend beyond said movable member and said jet body so as to be engageable against a well liner and to provide jet stand-off therefrom.

2. Apparatus for use in cleaning slots in a well liner comprising an elongated member adapted to be run into a well to a location where cleaning is desired, a statutory shaft member connected to said elongated member and having a free end extending perpendicular thereto, a movable member having a central opening through a portion of its length fitting over the free end of said shaft in slidable liquid-tight relationship therewith, a jet body having a central jet-forming opening therethrough for forming a jet of liquid connected to said movable member, a passageway formed in the interior of said movable member to provide liquid communication between the jet-forming opening in said jet body and the free end of said shaft through said central opening, a liquid inlet port in said movable member providing liquid communication into said passageway from outside said movable member, and at least one wheel member rotatably mounted on said movable member, said wheel member having an axis of rotation parallel to the axis of elongation of said elongated member and perpendicular to said stationary shaft member and having sufficient diameter to extend beyond said movable member and said jet body so as to be engageable against a well liner and to provide for jet stand-off therefrom.

3. The apparatus of claim 2 further characterized in that said elongated member is a tubular element having a cut-out portion in which said stationary member is connected and into which said movable member may be recessed.

4. The apparatus of claim 3 further characterized by a source of pressurized liquid and a conduit connecting said source of pressureized liquid with said liquid inlet port.

5. Apparatus for use in cleaning slots in a well liner comprising an elongated member adapted to be run into a well to a location where cleaning is desired, a shaft member connected to said elongated member and having a free end extending perpendicular thereto, a movable member having a central opening through a portion of its length fitting over the free end of said shaft in slidable liquid-tight relationship therewith, a pair of jet bodies each having a central jet-forming opening therethrough for forming a jet of liquid connected in spaced-apart relationship to said movable member, a passageway formed in the interior of said movable member to provide liquid communication between the jet-forming openings in said jet bodies and in the free end of said shaft through said central opening, a liquid inlet port in said movable member providing liquid communication into said passageway from outside said movable member, a pair of spaced-apart wheel members rotatably mounted on said movable member, said wheel members having a common axis of rotation perpendicular to said shaft member and having sufficient diameter to extend beyond said movable member and said jet bodies so as to be engageable against a well liner to provide for jet standoff therefrom, at least a pair of spaced-apart guide posts connected to said elongated member and having an end extending at right angles therefrom, a sleeve member slidingly connected to each of said guide posts and fixedly connected to said movable member and a limit flange connected to the end of each of said guide posts for engaging said collars to limit movement of said movable member.

6. The apparatus of claim 5 further characterized in that said elongated member is a tubular element having a cut-out portion in which said stationary member is connected and into which said movable member may be recessed.

7. The apparatus of claim 6 further characterized by a source of pressurized liquid and a conduit connecting said source of pressurized liquid with said liquid inlet port.