Bridge Concentric Testing Instrument for High-Inclination Wells
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Solution Overview
Problem
Conventional eccentric stratified waterflooding processes face difficulties in testing and adjusting high-inclination wells due to challenges in dropping and pulling instruments, and existing concentric testing instruments lack directional functionality and accuracy for small single-layer waterflooding amounts.
Innovation Solution
A bridge concentric direct-reading testing and adjusting instrument with a cable head, supporting mechanism, inclination well sliding power mechanism, flowmeter, and adjusting actuator, which includes a power motor, spring, impact hammer, one-way clutch assembly, and adjustable arm to facilitate single-layer testing and orientation in high-inclination wells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional eccentric stratified waterflooding process is used, then the instrument can be dropped and pulled, but it is difficult to perform dropping and pulling of stopper and mating of in-well instruments
Solution Approach 1:
The patent inverts the conventional eccentric structure to a concentric structure, where the inner tubular column is centered within the outer tubular column. This inversion simplifies the dropping and pulling operations while enabling effective mating of in-well instruments through the concentric alignment of connection interfaces.
Solution Approach 2:
The patent introduces a bridge structure as an intermediary component that connects the inner and outer tubular columns. This bridge provides auxiliary flow passages and serves as a mating interface, facilitating the connection and operation of in-well instruments without requiring complex dropping and pulling procedures.
2Adaptability or versatility
If conventional concentric testing instrument is used, then the structure is simple, but it lacks directional function and cannot be effectively used in high-inclination wells
Solution Approach 1:
The patent incorporates a vibrating mechanism that enables the instrument to generate directional vibrations. This dynamic feature allows the instrument to orient itself and navigate effectively in high-inclination wells, transforming a static concentric structure into a dynamically adaptable system capable of directional control.
Solution Approach 2:
The patent designs the concentric instrument to perform multiple functions: it maintains the simple concentric structure for basic operation while adding a vibrating mechanism for directional control. This multi-functionality enables the same instrument to be effectively used in both vertical and high-inclination wells.
3Measurement precision
If diminishing method is used for testing, then single-layer flow rate can be tested, but the test error is unacceptable for small single-layer waterflooding amounts
Solution Approach 1:
The patent segments the flow measurement system into distinct inner and outer tubular columns with separate flow passages. This segmentation allows independent measurement of flow rates in different layers, enabling precise testing of small single-layer waterflooding amounts by isolating the specific layer flow without interference from other layers.
Solution Approach 2:
The patent replaces the indirect diminishing method with a direct measurement approach using flowmeters installed in the concentric tubular columns. This substitution of measurement methodology provides direct reading of flow rates, significantly improving measurement precision for small single-layer waterflooding amounts.
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
Enables precise single-layer testing and adjusting with orientation functionality, improving accuracy and adaptability for high-inclination waterflooding wells by facilitating the dropping and pulling of the instrument and enhancing the ability to test and adjust stratified waterflooding systems.
Implementation Method 1
an inclination well sliding power mechanism positioned below the pressure sensor, connected above the supporting mechanism, and including a power motor, a spring, an impact hammer and a one-way clutch assembly
Data Source
AI summary
A bridge concentric direct-reading testing and adjusting instrument, comprising a cable head connected to a pressure sensor; a supporting mechanism having a pair of supporting arms; a sliding power mechanism including a power motor, a spring, an impact hammer and a one-way clutch assembly, the impact hammer slidably connected to the power motor to be rotated along with rotation of the power motor, a lower end of the impact hammer detachably connected to the one-way clutch assembly, and the one-way clutch assembly connecting the supporting arms via a transmission assembly to control opening and closing of the supporting arms; a flowmeter; and an adjusting actuator including an adjusting motor, an adjusting connector and an adjusting arm, the adjusting arm used for adjusting a waterflooding flow rate through rotation of the adjusting arm.