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Centralizer and drill rod and engineering machine applying same

A technology for construction machinery and drill pipes, which is applied in the fields of construction machinery, drill pipe structures, and righting devices, and can solve problems such as insufficient drilling accuracy, hole inclination, and large telescopic travel of drill pipes.

Inactive Publication Date: 2014-03-19
BEIJING SANY HEAVY MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, along with it, there are still some problems in the field construction process. For example, with the continuous lengthening of the pile hole depth required in the project, the telescopic stroke of the drill pipe is also increasing. When the drill pipe is extended to a certain length Because there are no reliable righting devices on the upper sections of the drill pipe, the drilling accuracy is often insufficient, which makes the problem of hole inclination become increasingly prominent
If there is a problem of drilling deviation on the construction site, it will not only seriously affect the normal construction progress, but also consume materials and labor

Method used

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  • Centralizer and drill rod and engineering machine applying same
  • Centralizer and drill rod and engineering machine applying same

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Embodiment Construction

[0017] The following will be combined with the preferred embodiment of the present invention figure 1 and figure 2 , The technical solutions in the embodiments of the present invention are clearly and completely described.

[0018] The present invention provides a drill rod structure 100, which is used in construction machinery such as rotary drilling rigs. The drill rod structure 100 includes a drill rod, a chuck 3 and a centralizing device. The drill rod structure 100 in the preferred embodiment of the present invention includes four drill rods, namely a first drill rod 11, a second drill rod 12, a third drill rod 13, and a fourth drill rod 14. The four drill rods Socket them together in turn.

[0019] The first drill rod 11 is the outer rod of the drill rod structure 100. The first drill rod 11 has an open end, and a peripheral wall 110 adjacent to the open end is provided with three clamping grooves 111. The clamping grooves 111 are used to fix the centralizer 5.

[0020] Th...

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Abstract

The invention provides a centralizer applied to a drill rod. The drill rod comprises an outer rod and a core rod fixed in the outer rod in a telescopic way. The centralizer comprises centralizing rings fixed on the outer rod and the core rod, and the diameters of the centralizing rings are equal. The centralizing rings butt against the inner wall of a pile hole to centralize the drill rod, therefore the deflection of the drill rod can be prevented and the pore-forming accuracy can be improved.

Description

Technical field [0001] The invention relates to a centralizing device, a drill rod structure and engineering machinery using the drill rod. Background technique [0002] With the vigorous construction of infrastructure such as highways and high-speed railways in my country, rotary drilling rigs have been rapidly developed and widely used. However, there are still some problems in the on-site construction process. For example, as the pile hole depth required in the project continues to increase, the telescopic stroke of the drill rod becomes larger and larger. When the drill rod is extended to a certain length Because there is no reliable centralizing device on the upper few rods of the drill pipe, the drilling accuracy is often insufficient, which makes the problem of the oblique hole increasingly prominent. If the drilling deflection problem occurs at the construction site, it will not only seriously affect the normal construction schedule, but also consume materials. [0003] T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/10E21B19/10
Inventor 水俊峰冯建伟
Owner BEIJING SANY HEAVY MASCH CO LTD
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