Subsurface pumping installation for handling viscous or sand-laden fluids
AssigneeUnited States Steel Corporation
InventorWalter S. Secrist
Life of this patent
Estimating the term…
Abstract
A subsurface pumping installation for handling viscous or sand-laden fluids. The installation includes parallel power and production tubing strings, a pump located at the bottom of the power tubing string, and a crossover which affords communication between the pump and the production tubing string. Diluent is conducted to the well through the power tubing string. A portion of the diluent is conducted to the pump barrel below the plunger, where it serves to exclude well fluid from the plunger. Another portion may be conducted through a bypass tube to a mixing chamber below the pump, where it mixes with well fluid.
Claims16
In a subsurface pumping installation which includes:
- parallel power and production tubing strings;
- a pump barrel at the lower end of said power tubing string;
- sucker rods extending down said power tubing string;
- a plunger movable up and down within said barrel;
- means connecting said plunger with said sucker rods;
- a crossover affording communication between said pump barrel and said production tubing string;
- said power tubing string being adapted to carry diluent from the surface into a well;
- means for transmitting at least a portion of the diluent to said barrel beneath said plunger and thence to said crossover;
- and
- valves for admitting well fluid to said crossover and discharging it therefrom on opposite movements of said plunger;
- said production tubing string being adapted to carry a mixture of well fluid and diluent to the surface;
- the improvement comprising:
- a landing shoe attached to one of said tubing strings at the lower end thereof;
- means carried by the other of said tubing strings at the lower end thereof stabbed and locked in said landing shoe;
- said landing shoe having upper edges which slope downwardly toward the central axis of said other tubing string to guide said last-named means into the landing shoe as said other tubing string is lowered;
- and
- tubular means connecting said crossover and said landing shoe.
In subsurface pumping installation which includes:
- parallel power and production tubing strings;
- a pump barrel at the lower end of said power tubing string;
- sucker rods extending down said power tubing string;
- a plunger movable up and down within said barrel;
- means connecting said plunger with said sucker rods;
- a crossover affording communication between said pump barrel and said production tubing string;
- said power tubing string being adapted to carry diluent from the surface into a well;
- means for transmitting at least a portion of the diluent to said barrel beneath said plunger and thence to said crossover;
- and
- valves for admitting well fluid to said crossover and discharging it therefrom on opposite movements of said plunger;
- said production tubing string being adapted to carry a mixture of well fluid and diluent to the surface;
- the improvement comprising:
- a landing shoe attached to one of said tubing strings at the lower end thereof;
- a mandrel carried by the other of said tubing strings at the lower end thereof and stabbed and locked in said landing shoe;
- packing rings and lobes on said mandrel;
- said landing shoe having cutouts for receiving said lobes as said mandrel is stabbed in the landing shoe, and undercut segments circumferentially aligned with said cutouts receiving said lobes on rotation of said mandrel to lock the mandrel in the landing shoe;
- and
- tubular means connecting said crossover and said landing shoe.
In a subsurface pumping installation which includes parallel power and production tubing strings, a pump barrel at the lower end of said power tubing string, sucker rods extending down said power tubing string, a plunger movable up and down within said barrel, means connecting said plunger with said sucker rods, and a crossover affording communication between said pump barrel and said production tubing string, said power tubing string being adapted to carry diluent from the surface into a well, said production tubing string being adapted to carry a mixture of well fluid and diluent to the surface, the improvements comprising:
- said connecting means and said plunger having a passage for receiving diluent from said power tubing string;
- said plunger having a segment in its upper portion making close clearance with said barrel and at least one segment below said first-named segment making a greater clearance with said barrel;
- said plunger having restricted ports affording communication between said passage and its outer circumference in the segment making greater clearance to introduce diluent to said barrel beneath said plunger and exclude well fluid therefrom;
- means below said barrel for mixing diluent with well fluid;
- a landing shoe attached to one of said tubing strings at the lower end thereof at a level above said pump barrel;
- means carried by the other of said tubing strings at the lower end thereof stabbed and locked in said landing shoe;
- said landing shoe having upper edges which slope downwardly forming the outline of a cone, the apex of which lies on the central axis of the tubing string which carries the means stabbed and locked in said landiing shoe;
- and
- a production tubing extension connecting said landing shoe and said crossover.
In a subsurface pumping installation which includes parallel power and production tubing strings, a pump barrel at the lower end of said power tubing string, sucker rods extending down said power tubing string, a plunger movable up and down within said barrel, means connecting said plunger with said sucker rods, and a crossover affording communication between said pump barrel and said production tubing string, said power tubing string being adapted to carry diluent from the surface into a well, said production tubing string being adapted to carry a mixture of well fluid and diluent to the surface, the improvements comprising:
- said connecting means and said plunger having a passage for receiving diluent from said power tubing string;
- said plunger having a segment in its upper portion making close clearance with said barrel and at least one segment below said first-named segment making a greater clearance with said barrel;
- said plunger having restricted ports affording communication between said passage and its outer circumference in the segment making greater clearance to introduce diluent to said barrel beneath said plunger and exclude well fluid therefrom;
- means below said barrel for mixing diluent with well fluid;
- a landing shoe attached to one of said tubing strings at the lower end thereof at a level aove said pump barrel;
- a mandrel attached to the other of said tubing strings at the lower end thereof stabbed and locked in said landing shoe;
- packing rings and lobes on said mandrel;
- said landing shoe having cutouts for receiving said lobes as said mandrel is stabbed in the landing shoe and undercut segments circumferentially aligned with said cutouts receiving said lobes on rotation of said mandrel to lock the mandrel in the landing shoe;
- and
- a production tubing extension connecting said landing shoe and said crossover.
In a subsurface pumping installation which includes parallel power and production tubing strings, a pump barrel at the lower end of said power tubing string, sucker rods extending down said power tubing string, a plunger movable up and down within said barrel, means connecting said plunger with said sucker rods, and a crossover affording communication between said pump barrel and said production tubing string, said power tubing string being adapted to carry diluent from the surface into a well, said production tubing string being adapted to carry a mixture of well fluid and diluent to the surface, the improvement comprising:
- means for transmitting at least a portion of the diluent to said pump barrel beneath said plunger;
- means below said plunger for mixing diluent and well fluid;
- a landing shoe connected with one of said tubing strings and receiving the lower end of the other of said tubing strings;
- said landing shoe having upper edges which slope downwardly forming the outline of a cone, the apex of which lies on the central axis of the tubing string received therein.
Dependencies are inferred from the claim text.