Square pile construction method and equipment of a rotary drilling rig
US11891892B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2022 |
| Grant date | Feb 6, 2024 |
| Priority date | — |
| Expiry date | Aug 6, 2042 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/002
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A square pile construction method and equipment of a rotary drilling rig are disclosed. The square pile construction method includes: site leveling; surveying and setting out; creating concrete retaining wall of wellhead; putting the drilling rig in place; adjusting the verticality of the drilling rig; lead hole drilling; reamed hole drilling; square hole drilling; hole cleaning with round drill bit; and hole cleaning with square drill bit. The square pile construction method and rotary drilling rig can use equipment for square pile construction in the whole process. Three kinds of square pile drill bits and a square pile hole cleaning drill bit in cooperation with the square pile construction method, which further realizes the mechanization of the whole process of square pile construction, are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.