Artificial lift well apparatus
AssigneeMacco Oil Tool Company, Inc.
InventorRobert W. Dinning
Life of this patent
Estimating the term…
Abstract
Artificial lift apparatus for use in a well having an outer pipe string for flow of a first fluid and an inner pipe string for flow of a second fluid. The apparatus may comprise a tubular receiver for connection in the inner pipe string and having ports for providing communication between the inner and outer pipe string. The receiver may include an inner tubular member and a concentrically surrounding outer tubular member defining an annular passageway therebetween through which at least a portion of the first fluid flow may pass. The apparatus may also include a well tool adapted for movement through the inner pipe string for engagement with the receiver inner tubular member and being provided with at least one valve for controlling fluid flow between the inner and outer pipe strings through the ports.
Claims25
Apparatus for use in a well having an outer pipe string for flow of a first fluid and an inner pipe string for flow of a second fluid, comprising in combination:
- receiver means adapted for connection in said inner pipe string and having port means providing communication between said inner and outer pipe strings;
- and a well tool adapted for movement through said inner pipe string into sealing engagement with said receiver means, said well tool having valve means for controlling fluid flow between said inner and outer pipe strings through said port means;
- said receiver means including first tubular means adapted for reception of said well tool and through which said fluid communication between said inner and outer pipe string is established, and second tubular means concentrically surrounding said first tubular means and laterally spaced therefrom to define an annular passageway therebetween that communicates with said first tubular means above and below the sealing engagement of said well tool with said receiver means and through which at least a portion of said second fluid flow may by-pass said well tool.
Receiver means adapted for receiving well tools at predetermined locations in a pipe string extending into a well, said receiver means comprising:
- first tubular means having means at its ends for connecting said receiver means in said pipe string in fluid communication therewith;
- latch detent means within said first tubular means for selectively stopping and latching a tool therein;
- port means in said receiver means for communicating the bore of said first tubular means with the exterior of said receiver means;
- an upper seal surface on the wall of said bore above said port means and a lower seal surface on the wall of said bore below said port means and second tubular means surrounding said first tubular means and providing an annular passageway therebetween, one end of said passageway being in fluid communication with said first tubular means above said upper seal surface and the other end of said passageway being in fluid communication with said first tubular means below said lower seal surface.
Dependencies are inferred from the claim text.