| 摘要 |
The invention relates to a method of positioning a pump in a well in order to create artificial lift. The method involves frictionally engaging a portion of the pump with a portion of the well, such that the pump is retained in a starting position. In order to progress the pump into the well, the pressure differential across the pump is increased, and then, when the pump is in a finishing position, the pressure differential across the pump is reduced such that the pump is once again retained in the finishing position by the frictional engagement between the pump and the well. A pump for use in the above method of deployment is also provided. |
| 主权项 |
1. A method and apparatus for positioning a turbine driven pump downhole within existing production tubing a well, the apparatus comprising at least an upper fluid aperture which allows fluid to pass therethrough,
a turbine arrangement which powers the pump, an impeller arrangement which facilitates the production of fluids from a fluid containing well when driven by the turbine arrangement, a mixing chamber provided between the turbine arrangement and the impeller arrangement, a connecting shaft which connects the turbine arrangement and the impeller arrangement, the connecting shaft comprising an internal fluid communicating channel which is in fluid communication with the upper fluid aperture, at least a fluid mixing aperture provided on the connecting shaft adjacent the mixing chamber, and a lower fluid aperture provided adjacent to the fluid mixing chamber, the lower fluid aperture selectively allowing fluid to pass therethrough such that a pump-in fluid flow path is provided and wherein the method comprises the steps of: pumping in fluid along the pump-in fluid flow path during pumping in of the apparatus into said production tubing, and wherein the method further comprises frictionally engaging a portion of the pump with a portion of the well the existing production tubing in order to define an upper production tubing annulus there above and a lower production tubing annulus there below such that the pump is retained in a starting position by said frictional engagement, and then, when it is desired to progress the pump into the well, selectively increasing a pressure differential across the pump in order to progress the pump into the well, and then, when the pump is in a finishing position, reducing the pressure differential across the pump such that the pump is retained in said finishing position by said frictional engagement between the pump and the well, and wherein when pumping the pump into the production tubing the pump-in fluid is passed along the pump-in fluid flow path from the upper annulus through the upper fluid aperture, along the fluid communicating channel of the connecting shaft, out of the fluid mixing aperture of the connecting shaft, into the mixing chamber, out of the lower fluid aperture and into the lower annulus for subsequent recirculation to the surface. |
