Composite shock absorber for polycrystalline diamond compact bit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 9, 2023
Grant Date -
Nov 25, 2021
app pub date -
Jul 16, 2021
filing date -
May 22, 2020
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention relates to a composite shock absorber for a polycrystalline diamond compact bit, comprising a drilling tool body having a water inlet, an impact body having a water outlet and forming a shock absorption cavity, a disc spring group having an annular pressing sleeve, a cylindrical torsion bar spring which has an external thread and a spline, is connected to the drilling tool body through threads and extended into an impactor and connected thereto through the spline, and the annular pressing sleeve, wherein bit vibration impact force is transmitted therebetween through a torsion transmission joint, and a bearing group is arranged between the lower end surface of the annular pressing sleeve and an annular step of the impact body. The composite shock absorber can weaken damage of the slippage effect to polycrystalline diamond compact cutting teeth, absorb axial vibration from a drill stem and prolong the service life of the bit.
First Claim
Other Claims data not available
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International Classification(s)
- 2021 Application Filing Year
- F16F Class
- 604 Applications Filed
- 306 Patents Issued To-Date
- 50.67 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- F16F Class
- 0 % this patent is cited more than
- 2 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Nov 9, 2026 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Nov 9, 2030 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Nov 9, 2034 |
