CN107191142A - The drilling tool and its application method of a kind of four wings alloy bit - Google Patents

Abstract

The invention relates to a drilling tool of a four-wing alloy drill bit and a method for using the same, comprising an annular fixing seat, the inner part of the threaded connection part of the lower opening of the annular fixing seat is hollow and has a concave thread for connecting a drill pipe, and the four-wing The wing alloy drill bit is provided with a drill bevel edge, and the drill bevel edge is composed of a cutting edge and an octagonal alloy welding hole, and the octagonal alloy welding holes are evenly distributed on the cutting edge. The four-wing alloy drill bit is provided with octagonal alloy teeth, and the shape of the octagonal alloy teeth is an octagonal prism with a 25° incision. The four-wing alloy drill bit is provided with alloy wedge-shaped teeth. The shape of the alloy wedge-shaped teeth is a combination of a cone and a cylinder, and the top of the cone is wedge-shaped. The advantage of the present invention is that: the drilling tool is provided with four inclined-plane cutting edges of the drill bit, and the cutting edge is provided with octagonal alloy teeth, and the upper mouth of the octagonal alloy teeth faces the earth-facing surface uniformly, and at the same time, an alloy wedge-shaped tooth is arranged on the top, which enhances the penetration of the drill bit. The efficiency of the rock greatly enhances its durability, reduces the mechanical loss rate, and reduces the production cost.

Description

Drilling tool of a four-wing alloy drill bit and its application method

technical field

The invention relates to the technical field of engineering construction, in particular to a drilling tool for a four-wing alloy drill bit.

Background technique

With the rapid development of our economy, the continuous expansion of the city scale, and the continuous strengthening of the use of underground space, there are more and more deep foundation pit projects and geotechnical projects. Drilling tools for rock drilling are widely used in today's market because of their convenient construction, high speed, and no need for a large amount of labor. However, because the three-lobe drill bit is made of ordinary steel, it has poor wear resistance and a very high wear rate. It can only be constructed in general soil areas and cannot be drilled into rocks. It is necessary to replace the DTH hammer to continue construction operations. However, the down-the-hole vertical cannot be applied in general soil, and the down-the-hole hammer vibrates greatly during deep hole operation, and the soil layer behind the drill bit is easy to collapse, causing the down-the-hole hammer to be buried in the hole. It can only be combined with casing construction at the same time. The construction process is complicated, the mechanical loss rate is high, and the cost is relatively high. Therefore, in order to promote the need to speed up the on-site construction progress and reduce the construction cost, it is particularly important to find a more convenient construction method.

Contents of the invention

The invention mainly solves the problems of high loss, high cost, complicated procedures, low efficiency and inability to cope with some rock-soil uncertainties caused by traditional drilling tools in soil-rock combination geology, and provides A convenient, high-efficiency, low-cost and durable four-wing alloy drill bit.

In order to achieve the above purpose, a drilling tool for a four-wing alloy drill bit is designed, which includes an annular fixing seat. The inside of the part is hollow and has concave threads for connecting drill pipes.

The four-wing alloy drill bit is provided with a drill bevel edge, and the drill bevel edge is composed of a cutting edge and octagonal alloy welding holes, and the octagonal alloy welding holes are evenly distributed on the cutting edge.

The four-wing alloy drill bit is provided with octagonal alloy teeth, and the shape of the octagonal alloy teeth is an octagonal prism with a 25° incision.

The four-wing alloy drill bit is provided with alloy wedge-shaped teeth, and the shape of the alloy wedge-shaped teeth is a combination of a cone and a cylinder, and the top of the cone is wedge-shaped.

Compared with the prior art, the patent of the present invention has the cutting principle that the cutting principle of the present invention is to gnaw and break the rock mass like teeth through several alloy tooth heads, and inject clean water through the water injection hole at the end of the ring-shaped fixing seat to lubricate and reduce drag and The temperature is lowered, the overall shape is conical, the contact surface of the cutting rock mass is large, the cutting speed is fast, and it is suitable for drilling with a large diameter. , The upper mouth of the octagonal alloy tooth is consistent with the face of the soil, and an alloy wedge-shaped tooth is set on the top, which enhances the efficiency of the drill bit into the rock, greatly enhances its durability, reduces the mechanical loss rate, and reduces the production cost.

Description of drawings

Figure 1 is a schematic plan view of the present invention.

Figure 2 is a top view of the present invention.

In the picture: 1. Octagonal alloy tooth 2. Ring holder 3. Alloy wedge tooth 4. Drill bevel edge.

detailed description

The present invention will be further described below in conjunction with accompanying drawing, and the structure and principle of this drill bit are very clear to those skilled in the art. It should be understood that the specific examples described here are only used to explain the present invention, not to limit the present invention.

See Figure 1 and Figure 2, the four-wing alloy drill bit includes four pieces of drill beveled edges welded to the upper connection part of the ring-shaped fixing seat, and the inner threaded connection part of the lower port is connected to the drill pipe. Partial. The octagonal alloy teeth welding holes are evenly distributed on the central axis of each drill bit, and the octagonal alloy teeth are installed in the welding holes. At the same time, the upper mouth of the octagonal alloy teeth faces the facing soil surface to enhance the rock penetration efficiency of the drill bit. The alloy wedge-shaped teeth are inlaid at the intersection positions of the upper and lower edges of the four drill bit bevels.

The use process of this drilling tool is as follows:

1. Hanging drilling tools: choose the drilling tools matching the drill pipe according to the type of drilling rig;

2. The drilling rig is in place: the drilling rig moves to the hole position, the working platform is adjusted to a horizontal state, and the support frame remains stable;

3. Install the four-wing alloy drill bit: connect and fix the internal thread connection part of the lower mouth of the four-wing alloy drill bit with the top of the drill pipe;

4. Rock entry operation: Align the tip of the four-wing alloy drill bit with the marked mark, and then carry out the drilling operation, and continuously increase the installation of drill pipes during the operation to ensure that the hole depth reaches the design value;

5. Hole finishing and rod closing: After the hole depth reaches the design value, the drill pipe is withdrawn one by one until the four-wing alloy drill bit leaves the hole, the drilling process is completed, and the down-the-hole drilling machine moves to the next marked point.

Claims (7)

1. a kind of drilling tool of four wings alloy bit, including anistree carbide button（1）, annular fixed seat（2）, alloy chisel teeth（3）, bore Head inclined-plane sword（4）, it is characterised in that described annular fixed seat（2）By annular connecting portion suitable for reading, under intraoral threaded joints with And the symmetrical otch in middle part is constituted, intraoral threaded joints jointed rod, the annular suitable for reading of annular fixed seat under annular fixed seat Four drill bit inclined-plane swords are welded at connecting portion（4）, drill bit inclined-plane sword（4）With annular fixed seat（2）Centered on adjacent point in 90 ° of axle Cloth, four described drill bit inclined-plane swords（4）Every drill bit inclined-plane sword radian is in 90 °, every drill bit inclined-plane sword（4）Cutting edge it is uniform The anistree carbide button of some of distribution, anistree carbide button（1）Crown suitable for reading is consistent towards meeting native face, and four drill bit inclined-plane swords are intersecting One alloy chisel teeth is set at blade tip.

2. a kind of drilling tool of four wings alloy bit as claimed in claim 1, it is characterised in that annular fixed seat（2）Lower mouth The inside of threaded joints is used for jointed rod for screw thread hollow and in a concave shape.

3. a kind of drilling tool of four wings alloy bit as claimed in claim 1, it is characterised in that drill bit inclined-plane sword is by cutting edge And anistree alloy welding hole is constituted, and is uniformly distributed anistree alloy welding hole on cutting edge, every drill bit inclined-plane sword cutting edge is with axis Anistree carbide button welding hole is uniformly distributed, anistree carbide button is arranged in welding hole.

4. a kind of drilling tool of four wings alloy bit as claimed in claim 3, it is characterised in that described anistree carbide button with It is evenly distributed on away from 11.5mm under drill bit inclined-plane sword cutting edge, top carbide button outer back gauge 8mm suitable for reading, the outer back gauge of afterbody carbide button Mouth 11mm.

5. a kind of drilling tool of four wings alloy bit as claimed in claim 4, it is characterised in that the anistree alloy tooth outline is Eight prisms are suitable for reading into 25 ° of otch.

6. a kind of drilling tool of four wings alloy bit as claimed in claim 1, it is characterised in that described alloy chisel teeth welding At four drill bit inclined-plane sword blade tips, end sets alloy chisel teeth, and alloy wedge shape tooth outline combines shape with cylinder in circular cone, circle Bore suitable for reading wedge shaped.

7. a kind of a kind of application method of the drilling tool of four wings alloy bit as claimed in claim 1, it is characterised in that this drilling tool It is as follows using flow：

（1）Poise drilling tool：According to rig type selecting and the supporting drilling tool of drilling rod；

（2）Rig is in place：Drilling-machine shifter is to the hole position, and workbench is adjusted to horizontality, and support frame keeps stable；

（3）Four wing alloy bits are installed：Intraoral threaded joints under four wing alloy bits are connected with drilling rod top；

（4）Enter rock operation：The tip of four wing alloy bits is directed at ready-made mark, perforate operation is then carried out, in operation not Drilling rod is installed in disconnected increase ensures that hole depth reaches design load；Utilize cutting principle, i.e., by several carbide button heads, similar tooth one Sample carries out the broken rock that bites to rock mass, and drag reduction and cooling are lubricated by the water injection hole injected clear water of annular fixed seat end, whole Body is tapered, and the contact surface for cutting rock mass is big, and cutting speed is fast, it is adaptable to which the larger drilling in aperture, this drilling tool is provided with four Drill bit inclined-plane sword, cutting edge is provided with anistree carbide button, and anistree carbide button is suitable for reading consistent towards native face is met, while top is provided with one Alloy chisel teeth, enhances the efficiency that drill bit enters rock；

（5）Pore-forming is put away sports equipment：Hole depth is reached after design load, and drilling rod is exited until four wing alloy bits leave aperture, drillman section by section Sequence is completed, and down-the-hole drill is moved to next mark point position.