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An improved electrical pump is first provided for use in a wellbore. The pump comprises a stator and a stator housing, and an armature and an armature housing. The stator housing and the armature housing define concentrically nested tubular bodies. The armature housing is configured to permit produc

An improved electrical pump is first provided for use in a wellbore. The pump comprises a stator and a stator housing, and an armature and an armature housing. The stator housing and the armature housing define concentrically nested tubular bodies. The armature housing is configured to permit production fluids to flow therethrough. In one aspect, the stator and armature are assembled in connectible and interchangeable sections called “modules” that can be attached in series. In one aspect, the electrical operation of coils within the stator is protected from individual coil short-circuiting or failure by wiring them in parallel, rather than in series. In addition, each module may be wired in parallel. In this way, a failure of one stator module will not result in the failure of another stator module. In an embodiment of the present invention, the valves of the pump are capable of being retrieved by a wireline, without pulling the entire production string. A method for using a plurality of electrical pumps is also provided. The configuration of the electrical pumps allows multiple linear pumps to be placed in series with the production tubular member. Alternatively, a rotary pump design is provided which allows multiple rotary pumps to be placed in series with the production tubular member.

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1. An electrical pump for lifting fluids from a wellbore, the wellbore having a tubular member residing therein, the electrical pump comprising:a stator; an armature that linearly reciprocates relative to the stator; a pump housing for housing the pump, the pump housing having a flow path therethrou

1. An electrical pump for lifting fluids from a wellbore, the wellbore having a tubular member residing therein, the electrical pump comprising:a stator; an armature that linearly reciprocates relative to the stator; a pump housing for housing the pump, the pump housing having a flow path therethrough; wherein the pump is operatively connected to the armature and is reciprocated with the armature; a traveling valve that reciprocates; a standing valve that does not reciprocate; and wherein the pump is configured with multiple fishing necks to allow for the traveling valve and the standing valve to be separately retrievable from the wellbore. 2. The electrical pump of claim 1, wherein the pump is attached to the armature.3. The electrical pump of claim 1, wherein the armature comprises a modular construction of armature modules.4. The electrical pump of claim 3, wherein the armature modules are wired in parallel.5. The electrical pump of claim 1, wherein the stator comprises a modular construction of stator modules.6. The electrical pump of claim 5, wherein the stator modules are wired in parallel.7. The electrical pump of claim 1, wherein the electrical pump is a positive displacement pump.8. The electrical pump of claim 1, wherein the relative reciprocation is controlled by a controller.9. The electrical pump of claim 8, wherein the controller controls at least a portion of the armature.10. The electrical pump of claim 8, wherein the controller controls at least a portion of the stator.11. The electrical pump of claim 8, wherein the controller is programmable.12. The electrical pump of claim 1, wherein the flow path comprises an inner bore.13. The electrical pump of claim 1, wherein:the electrical pump is a positive displacement pump; the armature comprises a modular construction of armature modules, the armature modules reciprocating together within the stator; and the stator comprises a modular construction of stator modules. 14. The electrical pump of claim 13, wherein the reciprocation of the armature modules is controlled by a controller.15. The electrical pump of claim 5, wherein the pump housing comprises a stator housing for supporting the stator modules, the stator housing having a first end and a second end, the first end being connected to the tubular member.16. The electrical pump of claim 3, wherein the pump housing comprises an armature housing for supporting the armature modules, the armature housing having a first end, a second end, and an inner bore therethrough.17. The electrical pump of claim 16, further comprising:a pump inlet connected to the stator housing proximal to the second end of the stator housing; and a pump outlet connected to the armature housing proximal to the second end of the armature housing, and being reciprocated by the armature housing. 18. An electrical pump for lifting fluids from a wellbore, the wellbore having a tubular member residing therein, the electrical pump comprising:a stator; an armature that linearly reciprocates relative to the stator; an stator housing for supporting the stator, the stator housing having a first end and a second end, the first end being connected to the tubular member; an armature housing for supporting the armature, the armature housing having a first end, a second end, and an inner bore therethrough; a pump inlet connected to the stator housing proximal to the second end of the stator housing; a pump outlet connected to the armature housing proximal to the second end of the armature housing, and being reciprocated by the armature housing; and wherein the pump is configured with multiple fishing necks to allow for the pump inlet and the pump outlet to be separately retrievable from the wellbore. 19. The electrical pump of claim 18, wherein the electrical pump is a positive displacement pump.20. The electrical pump of claim 19, wherein:the stator generates an oscillating magnetic field in response to direct current pulses that are cyclically switched in order to reverse polarity of the magnetic field; and the armature reciprocates within the stator in response to the oscillating magnetic field of the stator. 21. The electrical pump of claim 19, wherein:the pump inlet comprises an inlet port housing, and a standing valve within the inlet port housing; and the pump outlet comprises an outlet port housing, and a traveling valve within the outlet port housing. 22. The electrical pump of claim 18, wherein the armature housing and the connected pump outlet may be removed from the tubular member without pulling the tubular member from the wellbore.23. The electrical pump of claim 22, further comprising a fishing neck connected to the first end of the armature housing.24. The electrical pump of claim 18, wherein the armature housing and the connected pump outlet may be removed from the tubular member without pulling the stator housing and the connected pump inlet from the wellbore.25. The electrical pump of claim 18, wherein the pump inlet may be removed from the stator housing without removing the stator housing from the wellbore.26. The electrical pump of claim 21, wherein the inlet port housing comprises an upper end having a fishing neck, and a second end housing the inlet port check valve.27. The electrical pump of claim 25, wherein:the stator generates an oscillating magnetic field in response to direct current pulses that are cyclically switched; and the armature reciprocates within the stator in response to the oscillating magnetic field of the stator. 28. The electrical pump of claim 26, further comprising a latching assembly for unlatching the inlet port housing from the stator housing, the latching assembly comprising:a series of radially disposed locking segments, each locking segment having a vertical member and a horizontal member, the vertical member configured to be received within a locking segment recess within the stator housing when the locking segments are in their latched position, and the horizontal member configured to be received within an inlet port housing recess when the locking segments are in their unlatched position; at least one unlatching biasing member around the locking segments to bias the locking segments in their unlatched position; a lock segment latching member radially disposed about the inlet port housing intermediate the fishing neck of the inlet port housing and the lower end of the inlet port housing; and a plurality of lock segment biasing members radially connected to the lock segment latching member for biasing the locking segments outward in their latched position, the biasing force of the lock segment biasing members being greater than the biasing force of the unlatching biasing member. 29. The electrical pump of claim 28 wherein:the lock segment latching member further comprises a fishing neck for receiving a spear on a fishing tool; and the plurality of lock segment biasing members release from the locking segments when the lock segment latching member is raised by a fishing tool. 30. The electrical pump of claim 20, wherein the stator defines a plurality of stator modules, each stator module comprising a series of coils for generating the oscillating magnetic field and a stator housing portion.31. The electrical pump of claim 30, wherein each of the plurality of stator modules is electrically wired with a power source in parallel such that a failure of one of the stator modules does not produce a failure of another of the stator modules.32. The electrical pump of claim 30, wherein each of the stator modules is multiplexed such that each of the stator modules is capable of being selectively activated.33. The electrical pump of claim 31, wherein the armature defines a plurality of armature modules, each armature module comprising a series of magnets having a polarity and an armature housing portion, the polarities of the magnets being arranged to cause linear reciprocation of the armature modules and armature housing in response to the oscillating magnetic field of the stator coils.34. An electrical pump for lifting fluids from a wellbore, the wellbore having a tubular member residing therein, and the tubular member having a fluid flow path therethrough, the electrical pump comprising:an electric motor portion, the electric motor portion having a fluid flow path therethrough; a pump portion operatively connected to the electric motor portion, the pump portion being in fluid communication with the fluid flow path of the tubular member and also being in fluid communication with the fluid flow path of the electric motor portion; wherein the pump portion comprises a traveling valve and a standing valve, whereby the pump portion is configured with multiple fishing necks to allow the valves to be separately retrievable from the wellbore. 35. An electrical pump for lifting fluids from a wellbore, the wellbore having a tubular member residing therein, the electrical pump comprising:a stator; an armature that linearly reciprocates relative to the stator; an stator housing for supporting the stator, the stator housing having a first end and a second end, the first end being connected to the tubular member; an armature housing for supporting the armature, the armature housing having a first end, a second end, and an inner bore therethrough; a pump inlet connected to the stator housing proximal to the second end of the stator housing; a pump outlet connected to the armature housing proximal to the second end of the armature housing, and being reciprocated by the armature housing; wherein the electrical pump is a positive displacement pump; wherein the pump inlet comprises an inlet port housing, and a standing valve within the inlet port housing; wherein the pump outlet comprises an outlet port housing, and a traveling valve within the outlet port housing; wherein the inlet port housing comprises an upper end having a fishing neck, and a second end housing the inlet port check valve; and a latching assembly for unlatching the inlet port housing from the stator housing, the latching assembly comprising: a series of radially disposed locking segments, each locking segment having a vertical member and a horizontal member, the vertical member configured to be received within a locking segment recess within the stator housing when the locking segments are in their latched position, and the horizontal member configured to be received within an inlet port housing recess when the locking segments are in their unlatched position; at least one unlatching biasing member around the locking segments to bias the locking segments in their unlatched position; a lock segment latching member radially disposed about the inlet port housing intermediate the fishing neck of the inlet port housing and the lower end of the inlet port housing; and a plurality of lock segment biasing members radially connected to the lock segment latching member for biasing the locking segments outward in their latched position, the biasing force of the lock segment biasing members being greater than the biasing force of the unlatching biasing member. 36. The electrical pump of claim 35 wherein:the lock segment latching member further comprises a fishing neck for receiving a spear on a fishing tool; and the plurality of lock segment biasing members release from the locking segments when the lock segment latching member is raised by a fishing tool.