FIELD: gas-and-oil extraction industry.
SUBSTANCE: the downhole pump unit is intended for use in oil and gas extraction industry and may be used, for example, both in the capacity of water-raising unit and for extraction of the stratum liquids at operation and development of boreholes. The downhole pump unit contains a spinning tubing, a production tubing and a multiple-start screw pump, which casing is fixed on the production tubing. The helical surface of the multiple-start gyrator mechanism of the screw pump is made with the following kinematic ratio i chosen from 2/3 up to 11/12 and with a ratio of a step to effective diameter of the helical surface - within the range from 6 up to 12. The invention allows to raise efficiency and to increase service life of the downhole pump unit.
EFFECT: the invention ensures increased efficiency and service life of the downhole pump unit.
4 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| SUBMERGED PUMPING UNIT | 2000 |
|
RU2170367C1 |
| SUBMERSIBLE PUMPING UNIT | 2003 |
|
RU2247264C2 |
| DEVICE FOR PROPORTION SUPPLY OF CHEMICAL REAGENT TO WELL | 2000 |
|
RU2171364C1 |
| MULTISTART HELICAL ROTOR PUMP | 0 |
|
SU1286814A1 |
| SURFACE DRIVE OF SUBMERSIBLE SCREW PUMP | 1998 |
|
RU2145678C1 |
| SUBMERGED SCREW PUMP SURFACE DRIVE | 2000 |
|
RU2170368C1 |
| HELICAL GYRATOR HYDRAULIC MACHINE | 2000 |
|
RU2191294C2 |
| SURFACE DRIVE OF SUBMERSIBLE SCREW PUMP | 2003 |
|
RU2253753C1 |
| 0 |
|
SU1778367A1 | |
| APPARATUS FOR ASSEMBLING AND CENTERING TUBES FOR WELDING | 1998 |
|
RU2145537C1 |
