Torsionally Rigid Support Cable Torque Absorption
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Solution Overview
Problem
Existing drilling devices face challenges in providing efficient and reliable torque support for rotary unions, often requiring bulky installations or additional costly components to prevent stator twisting, which can impede operations and increase expenses.
Innovation Solution
A torsionally rigid support cable is used as a torque support, with a rigid connecting element between the stator and the support cable, allowing the torque to be absorbed by the cable, eliminating the need for bulky direct connections and reducing operational hindrance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bulky rigid connection is used to support torque on the stator, then reliable torque support is achieved, but operational hindrance increases and installation space is consumed
Solution Approach 1:
The patent uses a flexible hose instead of a rigid connection to provide torque support for the stator. The hose is arranged between the stator and the drill rod, allowing it to flex and accommodate operational movements while still providing the necessary torque support. This flexible connection eliminates the need for bulky rigid structures, thereby reducing operational hindrance while maintaining reliable torque support.
2Device complexity
If a separate rotary drive and controller are added to compensate for stator twisting, then torque arm is omitted, but device complexity and expense increase
Solution Approach 1:
The patent employs a flexible hose connection between the stator and drill rod that inherently accommodates rotational movements and twisting without requiring additional active compensation systems. The flexibility of the hose allows the stator to maintain proper positioning while eliminating the need for complex rotary drives and controllers, thus reducing device complexity while preserving stator position stability.
3Reliability
If the torque arm is made rigid and firmly connected to the drill, then torque support is ensured, but installation space above the drill rod is required
Solution Approach 1:
The patent replaces the rigid torque arm with a flexible hose that can be routed through or alongside existing drill rod components. This flexible connection provides the necessary torque support without requiring additional installation space above the drill rod, as the hose can accommodate movements and positioning within the existing structural envelope.
4Reliability
If a torsionally rigid support cable is used as torque support, then reliable torque absorption is achieved, but the cable must maintain structural rigidity
Solution Approach 1:
The patent utilizes a flexible hose with inherent torsional rigidity properties that can absorb and transmit torque effectively. The hose construction incorporates materials or structural features that provide sufficient torsional resistance to support the stator while maintaining the flexibility needed for drilling operations, thus achieving reliable torque absorption without requiring excessive structural rigidity.
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
This solution ensures reliable torque support for the rotary union without significant operational hindrance, using a torsionally rigid support cable to absorb torque, thereby enhancing drilling efficiency and reducing costs by eliminating the need for additional complex torque support systems.
Implementation Method 1
the support cable is designed to be torsionally rigid and that a rigid connecting element is arranged as a torque support between the stator of the rotary feedthrough and the torsionally rigid support cable
Data Source
Figure 1
AI summary
The invention relates to a drilling device and a drilling method with a rotatably driven drill string (12) comprising an inner line (14), a support cable (30), a rotary joint arranged between the drill string and the support cable, which has a retaining element (22) connected to the support cable and a rotating element (24) connected to the rotatable drill string, a line (16), and a rotary feedthrough designed for transmitting fluid or data between the line and the inner line of the drill string, wherein the rotary feedthrough has a rotor (52) connected to the drill string and a non-rotating stator (54) to which the line is connected. According to the invention, the support cable is designed to be torsionally rigid, and a rigid connecting element (40) is arranged as a torque support between the stator of the rotary feedthrough and the torsionally rigid support cable.