Progressive cavity pump and its method of operation in a wellbore
A technology of screw pump and wellbore, which can be used in pump, pump control, earth-moving drilling, etc., and can solve problems such as cost
Active Publication Date: 2017-07-18
HUSKY OIL OPERATIONS
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- Application Information
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Problems solved by technology
This type of work tends to take the operator several hours at great expense and loss of production
Method used
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[0024] Directional terms such as "upper," "lower," "top," "bottom," "downhole," and "uphole" are used in the following description for relative reference purposes only, and are not intended to imply reference to the There will be no restrictions on how to position anything in the process, or how to install anything in a module or how to install anything in relation to the environment. Collectively, the terms "upper", "uphole" and "top" refer to that part of a structure when installed in a vertical wellbore that is closer to the surface than other parts of the structure, and the terms "lower", " "Downhole" and "bottom" refer to the portion of a structure that is further from the surface than other portions of the structure when installed in a vertical wellbore.
[0025] Embodiments of the invention described herein relate to a progressive cavity pump assembly and a method for operating the same in a wellbore. The progressive cavity pump assembly includes a stator and at least ...
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A method of operating a progressive cavity pump in a wellbore, comprising: installing a stator onto a string of tubing, and inserting the stator and the string of tubing into the wellbore, wherein the stator has at least first and second active stator section; a first phase of operation is then performed involving insertion of the first rotor into the tubing string until the first rotor is positioned at a selected downhole location, wherein the first rotor has a first active rotor section when the first When the rotor is in the selected downhole position, the first operative rotor section is aligned with the first operative stator section, and the first rotor is rotated relative to the stator such that the aligned first operative rotor section and the first operative stator section are aligned. The stator segments generate the pumping force. The method also includes a second stage of operation involving removing the first rotor from the wellbore and inserting the second rotor into the tubing string until the second rotor is positioned at a selected downhole location, wherein the second rotor has a second an active rotor section that, when the second rotor is in the selected downhole position, aligns the second active rotor section with the second active stator section and rotates the second rotor relative to the stator such that the aligned second The active rotor section and the second active stator section generate the pumping force.
Description
technical field [0001] The present invention generally relates to a progressive cavity pump and a method for operating the same in a wellbore, such as in an oil and gas wellbore. Background technique [0002] A progressive cavity pump, also commonly referred to as a Moineau pump, comprises two interfacing screw parts, a stator and a rotor. Typically, the stator includes a cylindrical metal casing attachable to a tubing string and an elastomeric helix and longitudinally extending cavity mounted to the interior of the metal casing. Typically, the rotor includes a metal helical rod attachable to a rod. As a general principle, the rotor has one helical order less than the stator, ie the rotor has helical order n and the stator has n+1 helical order. For example, when the rotor is a single helix with helix stage n=1, the stator has a double helix with helix stage n=2, and when the rotor is a double helix with n=2, the stator is a helix with n=3 Triple Helix, and more. In such...
Claims
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IPC IPC(8): F04C2/107E21B43/12F04C14/00
CPCE21B43/121F04C2/1071F04C13/008F04C2230/601F04C2230/70F04C2230/80F04C2230/60F04C2230/604
Inventor 斯蒂芬·巴伯
Owner HUSKY OIL OPERATIONS