CN218934344U - Arc-shaped rib gas drainage and slag discharge drill pipe - Google Patents

Abstract

The utility model relates to a circular arc-shaped rib gas pumping and discharging slag drill rod, wherein a concave arc-shaped flow guide surface for breaking and discharging drilling slag is axially arranged between any two circular arc-shaped ribs on a circular arc-shaped rib drill rod body, and the concave arc-shaped flow guide surface and the circular arc-shaped ribs are uniformly distributed at intervals in the circumferential direction. The rotating radiuses of the plurality of concave arc-shaped flow guiding surfaces are the same. The concave arc-shaped guide surfaces which are uniformly distributed in the circumferential direction are arranged on the drill rod body, after drilling slag is formed, the drilling slag is smashed by the concave arc-shaped guide surfaces in the rotating process of the drill rod, and then discharged outwards from gaps between the concave arc-shaped guide surfaces and the inner wall of the drill hole, so that the slag discharging effect is greatly enhanced.

Description

Arc-shaped rib gas drainage and slag discharge drill pipe

technical field

The utility model relates to an arc-shaped convex rib gas drainage and slag discharge drill pipe.

Background technique

In the mining process of high-gas coal mines, gas drainage must be carried out first, and drill pipes must be used in the process of gas drainage. In general, round drill pipes are used. In this way, the slag generated during the drilling process is not easy to be discharged as soon as possible, which not only affects the drilling efficiency, but also easily deviates. If a prismatic drill pipe is used, the thin-walled pipe needs to be stretched and deformed. It is polygonal, faster to drill than round drill pipe, straight to drill, and easy to discharge slag, but it needs to reprocess the nut joint and bolt joint to weld with the rod body, so the drill pipe is easy to break at the welded part during use. In order to increase the strength of the bolt connection part, there are also prismatic drill pipes in the industry that process the connection part of the drill pipe into a cylindrical joint. In this way, although the strength of the bolt connection part is improved, due to the obstruction of the cylindrical connection part, slag discharge is caused. Not smooth. How to save costs, reduce the difficulty of handling, increase the strength of the rod body, and smooth slag discharge is a major problem for gas drainage drill pipes at present.

Contents of the invention

The purpose of the utility model is to provide a circular-arc convex edge gas drainage and slag discharge drill pipe which can increase the drilling efficiency and realize smooth slag discharge.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a circular arc convex rib gas pumping and slag discharge drill pipe, comprising a circular arc convex rib drill pipe body, the circular arc convex rib drill pipe body A concave arc-shaped diversion surface for breaking and discharging drilling slag is arranged axially between any two arc-shaped ribs, and the circumferential interval between the concave arc-shaped diversion surface and the arc-shaped ribs is evenly distributed .

For the arc-shaped convex rib gas drainage and slag discharge drill pipe, the number of the concave arc-shaped diversion surfaces is 2-4, and the radius of rotation of the plurality of concave arc-shaped diversion surfaces is the same.

Owing to adopting above-mentioned technical scheme, the beneficial effect of the utility model is:

The drill pipe body is provided with a plurality of concave arc-shaped diversion surfaces evenly distributed in the circumferential direction, and the rotation radii of the plurality of concave arc-shaped diversion surfaces are the same. After the drilling slag is formed, during the rotation of the drill pipe, the concave arc-shaped diversion surface breaks up the drill slag, and then it is discharged from the gap between the concave arc-shaped diversion surface and the inner wall of the borehole. The diversion surface is set as a concave arc surface , greatly enhanced the slag removal effect.

Additional advantages, objects and features of the invention will be set forth in part in the ensuing description. And to some extent, it will be obvious to those skilled in the art based on the investigation and research below, or can be taught from the practice of the present utility model. The objectives and other advantages of the utility model can be realized and obtained by the structure particularly pointed out in the following description, claims, and accompanying drawings.

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

Description of drawings

Fig. 1 is the front schematic diagram of the utility model embodiment 1

Figure 2 is a schematic cross-sectional view along the A direction in Figure 1

Fig. 3 is the sectional schematic diagram of the utility model embodiment 2

Fig. 4 is the sectional schematic diagram of the utility model embodiment 3

Marks in the figure: 1-arc-shaped convex rib drill pipe body 2-arc-shaped convex rib 3-concave arc-shaped diversion surface

Detailed ways

As shown in Figures 1 and 2, an arc-shaped ribbed gas pumping and slagging drill pipe includes a circular-arc-shaped ribbed drill-pipe body 1, and any two A concave arc-shaped diversion surface 3 for crushing and discharging drill slag is arranged axially between the arc-shaped convex ribs 2, and the circumferential distance between the concave arc-shaped diversion surface 3 and the arc-shaped convex rib 2 is uniform. distributed.

The number of the concave arc-shaped flow guiding surfaces 3 is 2-4, and the rotation radii of the multiple concave arc-shaped flow guiding surfaces are the same. Generally, three concave arc-shaped guide surfaces 3 have the best effect.

As shown in FIG. 3 , as an embodiment, there are two concave arc-shaped guide surfaces 3 .

As shown in FIG. 4 , as another embodiment, there are four concave arc-shaped guide surfaces 3 .

Since the utility model processes the concave arc-shaped flow guide surface on the drill rod, the drilling slag generated during the drilling process can be easily broken and discharged along the concave arc-shaped flow guide surface. Effectively improve the drilling efficiency.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model without limitation, other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the utility model, as long as they do not depart from the technical solution of the utility model The spirit and scope should be included in the claims of the present utility model.

Claims (2)

1. A circular-arc-shaped convex-rib gas drainage and slagging drill pipe, comprising a circular-arc-shaped convex-rib drill-pipe body (1), characterized in that: any arc-shaped convex-rib drill pipe body (1) A concave arc-shaped diversion surface (3) for crushing and discharging drill slag is axially provided between the two arc-shaped ribs, and the concave arc-shaped diversion surface (3) and the arc-shaped rib ( 2) The circumferential intervals are evenly distributed. 2. According to claim 1, the arc-shaped ribbed gas pumping and slag discharge drill pipe is characterized in that: the number of said concave arc-shaped diversion surfaces (3) is 2-4, at most The radius of rotation of the two concave arc guide surfaces (3) is the same.

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