Opening-closing type salvaging device for drilled pile drill bits

A salvage device and bored pile technology, which is applied in earth-moving drilling, wellbore/well components, etc., can solve problems such as time-consuming, eccentric inclination of the drill bit, serious in-hole accidents, etc., saving manpower and material resources, and being easy to operate. , the feasible effect of salvage operations

Inactive Publication Date: 2016-08-03
惠州市公路管理局 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing methods and equipment for salvaging drill bits often have certain defects. For example, using a crane to carry a hook to salvage is not only time-consuming, but the hook grabbing the drill belt or support plate will cause the bit to tilt eccen

Method used

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  • Opening-closing type salvaging device for drilled pile drill bits
  • Opening-closing type salvaging device for drilled pile drill bits
  • Opening-closing type salvaging device for drilled pile drill bits

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Embodiment Construction

[0029] The present invention will be described in further detail below according to accompanying drawing:

[0030] according to figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 It can be seen that a kind of retractable drill bit fishing device for bored piles is composed of a housing 1, a limit rod 2, an upper limit bolt 3, a lower limit bolt 4, a movable rod 5, a limit sliding sleeve 6, a guide sliding sleeve 7, and a connecting rod. Parts such as bar 8, go out bar window 9 are formed. It is characterized in that: the shell 1 is a thin-walled cylindrical conical tube composed of a cylindrical shape in the upper part and a conical shape in the lower part. The top surface of the shell 1 is circular, and a circular hole is opened at the center of the circle. The diameter of the round hole is the same as the outer diameter of the drill pipe. The limiting rod 2 passes through the circular hole at the top of the housing 1. The limiting rod 2 passes through...

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Abstract

The invention discloses an opening-closing type salvaging device for dilled pipe drill bits. A housing is a thin-wall cylindrical tapered barrel; a limiting rod passes through from a housing; an upper limiting bolt and a lower limiting bolt are welded on the limiting rod; four rod outlet windows are vertically formed in the side wall of the housing; two connecting rods are separately welded horizontally in two vertical inside centers of the rod outlet windows; guide slide sleeves are hinged between the two connecting rods in the rod outlet windows by taking the side wall as the center; a limiting slide sleeve is arranged between the upper limiting bolt and the lower limiting bolt of the limiting rod; movable rods are connected to the limiting slide sleeve in a manner of enabling a fixing rod to pass through a horizontal hole; the four movable rods on the limiting slide sleeve separately pass through four guide slide sleeves in corresponding directions to get out from the housing. The limiting slide sleeve upwards slides along the limiting rod, the movable rods are opened and the limiting slide sleeve downwards slides along the limiting rod, so that the movable rods are closed. The device realizes multi-angle all-around salvaging work for multiple drill bits in drilled holes and karst caves, and has great significance on improving the technical level of pile foundation construction.

Description

technical field [0001] The invention relates to the technical field of pile foundation construction in building and bridge engineering, in particular to an open-and-close drill bit salvage device for bored piles, which is suitable for handling accidents such as drill bit drop and drill pipe breakage in boreholes when drilling rigs are used for bored pile construction. bored pile drill bits for salvage. Background technique [0002] Bored piles are widely used in foundation construction projects such as municipal construction, highway bridges, high-rise buildings, docks and embankments. Drilling equipment is mainly circular drilling rigs and rotary drilling rigs. During the process of drilling piles, due to changes in geological conditions, poor quality of flange connections, unstable drilling rigs, swinging of drill bits, and negligence in human operation, etc., drills often occur. When the rod is detached, the drill pipe breaks and the drill bit falls off to the bottom of ...

Claims

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Application Information

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IPC IPC(8): E21B31/18
CPCE21B31/18
Inventor 巫惠斌黄云英陈善雄许锡昌戴张俊秦尚林姜领发余飞罗红明李剑
Owner 惠州市公路管理局
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