Drilling Tool Thread Profile for Radial Component Housing
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Solution Overview
Problem
Conventional drilling tools require increased length to accommodate multiple components, leading to higher manufacturing and transport costs due to the linear arrangement of components in collars, which is inefficient and costly.
Innovation Solution
The drilling tool incorporates a unique internal thread design in the first collar, increasing its inner diameter to house more components in a shorter length, while maintaining structural integrity, and includes a pressure sleeve and torque sleeve to protect sensitive components and optimize component placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If components are arranged linearly along the length of the collar, then each component can be housed sequentially, but the overall length of the drilling tool increases
Solution Approach 1:
The patent transitions from a one-dimensional linear arrangement of components along the collar length to a two-dimensional radial arrangement within the collar's cross-sectional area. The unique internal thread profile creates enlarged radial spaces at the collar ends, allowing components to be positioned in the radial dimension rather than extending the tool axially, thus increasing component capacity without increasing overall length.
2Adaptability or versatility
If the collar length is increased to accommodate more components, then component housing capacity increases, but manufacturing and transport costs increase
Solution Approach 1:
The patent modifies the geometric parameters of the internal thread profile, specifically using a smaller thread pitch and optimized root radius to create enlarged radial spaces within the existing collar length. This parameter optimization allows the same collar length to house more components by better utilizing the available cross-sectional area, avoiding the need to manufacture longer collars and thereby reducing manufacturing and transport costs.
3Volume of stationary object
If a unique internal thread design with smaller pitch is used, then inner diameter is increased to house more components, but thread strength may be compromised
Solution Approach 1:
The patent applies different geometric characteristics to different parts of the thread profile. The thread has a smaller pitch in the major portion to increase inner diameter volume for component housing, while maintaining an optimized root radius at critical stress points to preserve thread strength. This local differentiation of geometric qualities allows simultaneous achievement of increased capacity and maintained structural integrity.
Solution Approach 2:
The patent optimizes specific parameters of the thread profile including the root radius and pitch distribution. By increasing the root radius at critical locations and carefully selecting the pitch value, the design achieves larger inner diameter volume while compensating for potential strength losses from the smaller pitch, thereby maintaining thread strength despite the modified geometry.
Data Source
AI summary
A drilling tool for use in a wellbore comprises a first collar having a first bore extending from a first send to a second end and an internal thread disposed on the bore at the second end. The drilling tool also comprises a second collar having a second bore extending from a third end to a fourth end and an external thread disposed on the third end. The third end is coupled to the second end of the first collar. A first set of components is housed within the first bore and a second set of components is housed on a sidewall of the second collar formed between the second bore and an outer surface of the second collar.