Eccentric Screw Pump Axial Removal System
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing eccentric screw pumps installed in boreholes require costly and time-consuming uninstallation processes due to axial and radial anchoring, making removal and maintenance complicated.
Innovation Solution
A pump system with a detachable connection between the eccentric screw pump and motor, allowing axial movement and using connecting means for friction-locked or form-fit fixation, enabling simple and efficient removal by pulling the pump out of the borehole.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radial and axial anchoring is used to fix the eccentric screw pump in the borehole, then the pump stability and reliability are improved, but the device complexity and uninstallation difficulty increase
Solution Approach 1:
The pump system is divided into separable components: the motor assembly (with radial anchoring) remains fixed in the borehole, while the pump unit can be independently removed axially. This segmentation allows the pump to be stabilized during operation while enabling simple removal when needed, resolving the contradiction between stability and ease of uninstallation.
Solution Approach 2:
The anchoring system transitions from a static fixed connection to a dynamic system where the pump can be freely positioned axially during operation but can be easily extracted when required. The motor assembly provides radial stabilization while allowing axial movement, creating a dynamic balance between stability and removability.
2Ease of operation
If detachable connection between pump and motor is used, then the ease of operation and maintenance are improved, but the connection reliability may worsen
Solution Approach 1:
The system is segmented into a motor assembly and a pump unit with a detachable connection interface. This allows the pump to be easily removed for maintenance while the motor remains in place, improving ease of operation. The connection interface is designed to maintain reliability during operation through precise mechanical engagement.
Solution Approach 2:
A drive shaft or coupling mechanism serves as an intermediary between the motor and pump, providing a controlled detachable connection. This intermediary element ensures reliable power transmission during operation while allowing for easy disconnection when maintenance is needed, balancing connection reliability with ease of operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Facilitates straightforward and time-optimized removal of the eccentric screw pump from the borehole without releasing the connection to the motor, reducing installation and maintenance time and costs.
Implementation Method 1
the rotor is accommodated in the stator and moves eccentrically in the stator. Moving delivery spaces are formed between the stator and the rotor as a result of the motion of the rotor
Implementation Method 2
the rotor lies against an inner wall of the stator formed by elastic material, pressure being applied
Implementation Method 3
one or more connecting means, by means of which the eccentric screw pump is fixed in the riser or in the well pipe
Data Source
AI summary
A pump system and a method for pumping viscous or partially viscous media out of a borehole. The pump system includes a well pipe which is installed in the borehole and a motor which is coupled to an eccentric screw pump, the eccentric screw pump including one or more stators and one or more rotors which are received in the stator(s) so as to rotate eccentrically. One or more connection mechanisms fix the eccentric screw pump in the well pipe in a force-fitting and/or formfitting manner. For the purpose of removing the eccentric screw pump from the borehole, the eccentric screw pump is held by means of the one or more connection mechanisms with an axial freedom of movement.