CN111622676A - Rock-entering drill bit of rotary drilling rig and rotary drilling rig - Google Patents

Abstract

The invention relates to the technical field of rotary drilling rigs, in particular to a rock drilling bit of a rotary drilling rig and a rotary drilling rig. The rock drilling bit of the rotary drilling rig provided by the present invention includes a drill barrel, a cutter and an annular cutter head, and the annular cutter head is provided with a hob, bucket teeth and a cutter. When contacting the rock, because the hob shaft can withstand a large radial pressure, the hob will generate a large pressure on the rock layer after being subjected to the radial pressure, and the rock will crack when pressed by the hob to achieve pre-breaking. The cones or picks continue to follow up, grinding, knocking and breaking the rock formation. Cracks have been generated due to the rolling of the hob, and the picks or cones can easily dive into the cracks of the rock formation, causing crushing and crushing of the rock formation. The follow-up of the bucket teeth mainly prevents the secondary grinding of the drill slag caused by the debris generated after the cutting of the cone and the pick. Wider application range and higher rock entry efficiency.

Description

A kind of rotary drilling rig into rock drill bit and rotary drilling rig

technical field

The invention relates to the technical field of rotary drilling rigs, in particular to a rock drilling bit of a rotary drilling rig and a rotary drilling rig.

Background technique

Rotary drilling rig is a kind of construction machinery for hole forming operation. Most of the digging drills use a single drill bit to break the stone. The commonly used drill bits include bucket tooth bits, pick bits and roller cone bits.

For construction in soft strata, the double bottom salvage bucket tooth bit is used for full-section cutting, and the drilling efficiency of full-section cutting in soft strata is high.

In the construction of pebble strata, the full-section cutting is carried out with a double-bottom sand bucket pick bit. When the boulder is constructed, the pick bucket drill is used for annular cutting, the pick is submerged and squeezed to crush the boulder, and the center drill slag is taken out by the double bottom sand bucket pick bit, and finally full-section cutting is realized. The main working principle of the pick is submerged crushing.

For rock construction, the roller cone bit is used to cut the rock formation in a circular shape. The rotation of the revolving cone of the drill bit grinds, knocks and breaks the rock. After the circular cutting is completed, the drill core is taken out. If the drill core cannot be taken out, a double bottom is required. The sand bucket pick bit makes full-section cutting of the drill core and takes out the drilling slag. The main working principle of the cone is to grind, knock and break the rock formation through the rotation of the revolving cone of the drill bit.

SUMMARY OF THE INVENTION

(1) The technical problem to be solved by the present invention is: the existing rotary drilling rig bit adopts a single tool; the annular cutting footage speed is slow and the construction efficiency is low during rock formation construction.

(2) Technical solutions

In order to solve the above technical problems, an embodiment of the present invention provides a rotary drilling rig into a rock drill bit, including a drill barrel, an annular cutter head and a cutter; the drill barrel is a cylindrical structure with a hollow cavity formed inside, and the One end of the drill barrel is provided with an end cover, the end cover is provided with a connecting part, the other end of the drill barrel is of an open structure, and the annular cutter head is arranged on the open end of the drill barrel; on the annular cutter head; the cutter comprises a hob, bucket teeth and a drill, the drill is a pick and/or a roller, and the hob is higher than the drill and the bucket tooth height

According to an embodiment of the present invention, at least one hob and at least one bucket tooth are arranged on the annular cutter head; a tool holder is arranged on the annular cutter head, and the hob is mounted on the cutter inside the rack.

According to an embodiment of the present invention, the drill bit is at least one cone set on the annular cutter head.

According to an embodiment of the present invention, the annular cutter head is provided with a plurality of hob cutters, a plurality of bucket teeth and a plurality of the tooth rollers; a plurality of the hob cutters, a plurality of the bucket teeth and a plurality of the The rollers are spaced and evenly distributed on the annular cutter head; the diameter of the cutting track of the rollers is larger than the outer diameter of the rotation track of the tool holder.

According to an embodiment of the present invention, the drill is at least one pick set on the annular cutter head.

According to an embodiment of the present invention, the annular cutter head is provided with a plurality of hob, a plurality of bucket teeth and a plurality of the picks; a plurality of the hob, a plurality of the bucket teeth and a plurality of the The picks are spaced and evenly distributed on the annular cutter head; the diameter of the cutting track of the picks is larger than the outer diameter of the rotation track of the tool holder.

According to an embodiment of the present invention, the drill bit includes at least one cone and at least one pick set on the annular cutter head.

According to an embodiment of the present invention, the annular cutter head is provided with a plurality of hob, a plurality of bucket teeth, a plurality of cones and a plurality of the picks; a plurality of the hob, a plurality of the The bucket teeth, the plurality of cones and the plurality of picks are spaced and evenly distributed on the annular cutter head; the diameters of the cutting tracks of the cones and the cutting tracks of the picks are larger than the rotation of the tool holder The outer diameter of the track.

According to an embodiment of the present invention, the outer wall of the drill barrel is provided with a helical sheet.

The present invention also provides a rotary drilling rig, including the rock drilling bit of the rotary drilling rig described in any of the above embodiments.

Beneficial effects of the present invention: the rotary drilling rig drill bit provided by the embodiment of the present invention includes an annular cutter head and a cutter, and the annular cutter head is provided with a hob, bucket teeth and drill cutters, and the cutter cutters are cones and picks One or both of them; for hard rock drilling operations, the hob first contacts the rock, because the hob shaft can withstand a large radial pressure, so the radial pre-broken, after the hob is subjected to radial pressure, the hob will face the rock formation. A larger pressure is generated, and the rock will crack when pressed by the hob to achieve pre-breakage. The cones or picks continue to follow up, and the rock formations are ground, knocked and broken through the revolution of the drill bit and the rotation of the cones or picks. Cracks have been generated due to the rolling of the hob, and the cones or picks can easily dive into the cracks of the rock formation, causing crushing and crushing of the rock formation. The follow-up of the bucket teeth is mainly to prevent the secondary grinding of drilling slag caused by the debris generated after the cutting of the cone and the pick. Compared with the single drill bit provided by the present application, the drill bit provided by the present application can be applied to the construction of rock formations with different geology, has a wider application range, and has a higher rock penetration efficiency.

Description of drawings

The advantages of the above and/or additional aspects of the present invention will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 is the perspective view of the rock drilling bit of the rotary drilling rig described in the first embodiment of the present invention;

Fig. 2 is the bottom view of the rock drilling bit of the rotary drilling rig described in the first embodiment of the present invention;

FIG. 3 is a side view of the rock drilling bit of the rotary drilling rig described in Embodiment 1 of the present invention;

Fig. 4 is the perspective view of the rotary drilling rig rock drilling bit described in the second embodiment of the present invention;

Fig. 5 is the bottom view of the rock drilling bit of the rotary drilling rig described in the second embodiment of the present invention;

FIG. 6 is a side view of the rock drilling bit of the rotary drilling rig according to the second embodiment of the present invention

Fig. 7 is the perspective view of the rotary drilling rig into the rock drill bit described in Embodiment 3 of the present invention;

Fig. 8 is the bottom view of the rock drilling bit of the rotary drilling rig described in Embodiment 3 of the present invention;

FIG. 9 is a side view of the rock drilling bit of the rotary drilling rig according to the third embodiment of the present invention.

The corresponding relationship between the reference numerals and component names in Figures 1 to 9 is:

1. Drill bit, 11, Drill barrel, 111, Hob, 112, Bucket tooth, 113, Pick tooth, 114, Cone, 115, Spiral piece, 116, End cover, 117, Connecting part, 118, Hollow cavity, 12. Ring cutter head.

Detailed ways

In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments may be combined with each other in the case of no conflict.

Example 1

As shown in FIG. 1 to FIG. 3 , the present embodiment provides a rotary drilling rig drilling bit 1 , which includes a drill barrel 11 , an annular cutter head 12 and a cutter; the drill barrel 11 is a hollow cavity 118 formed inside the drill barrel 11 . Cylindrical structure, one end of the drill barrel 11 is provided with an end cover 116, the end cover 116 is provided with a connecting portion 117, the end surface of the annular cutter head 12 is annular, and the annular cutter head 12 is connected to the other end of the drill barrel 11, and the cutter is arranged on the annular cutter head 12; /or cone 114, the height of the hob 111 is greater than the height of the drill and the bucket teeth 112

The rock drilling bit 1 of a rotary drilling rig provided by the embodiment of the present invention includes a drill barrel 11 , and an open end of the drill barrel 11 is provided with a hob 111 , bucket teeth 112 and a drill, and the drill is one of the cone 114 and the pick 113 . or two. For hard rock drilling operations, the hob 111 first contacts the rock. Because the shaft of the hob 111 can withstand a large radial pressure, it is pre-broken in the radial direction. If the rock formation is pressed by the hob 111, cracks will occur to achieve pre-breakage. The roller cone 114 continues to follow up, and through the revolution of the drill bit 1 and the rotation of the roller cone 114, the rock formation is ground, knocked and broken. The follow-up of the bucket teeth 112 is mainly to prevent the secondary grinding of drilling slag caused by the debris generated by the cone 114 and the pick 113 after cutting, and the bucket teeth 112 need to remove the cutting debris in the ring groove.

In this embodiment, the drill is a roller cone 114, that is, in this embodiment, the annular cutter head 12 is provided with a hob 111, bucket teeth 112 and a roller cone 114, wherein the hob 111, the bucket The teeth 112 and the cones 114 are each provided with at least one.

As shown in FIG. 1 to FIG. 3 , in this embodiment, a plurality of the hob 111 , the bucket teeth 112 and the rollers 114 are provided, and a plurality of the hob 111 , a plurality of the bucket teeth 112 and a plurality of The rollers 114 are spaced and evenly distributed on the annular cutter head 12 ; the diameter of the cutting track of the rollers 114 is larger than the outer diameter of the rotation track of the tool holder.

Preferably, as shown in the drawings, as shown in FIG. 1 , in this embodiment, the annular cutter head 12 is provided with four hob cutters 111 and six cones 114 , and the cones 114 are related to the annular cutter head 12 . The end face of the cutter head 12 is inclined, and the two cones 114 with opposite inclination directions form a set of cones 114 , and the axes of the two cones 114 in the set of cones 114 are related to the axis of the drill barrel 11 . Symmetrical; as shown in the figures and figures, there are two bucket teeth 112, two bucket teeth 112 are arranged symmetrically about the axis of the drill barrel 11, and at the same time, the hob 111 is provided with four, four The hobs 111 are arranged opposite to each other, and the central angle of two adjacent hobs 111 is 90°, that is, the four hobs 111 are spaced apart and evenly distributed on the end face of the annular cutter head 12 . The end face of the drill bit 1 is divided into four areas by the four hob cutters 111, and the number of the roller cones 114 is six, wherein two areas are provided with two roller cones 114, and the other two areas are provided with a tooth roller 114. The wheel 114 and one bucket tooth 112, the four pairs of cones 114 are symmetrically arranged in pairs, and the two cones 114 in the same cone 114 group are inclined in opposite directions, one of which is inclined in the forward direction, and the other is inclined in the opposite direction, adjacent to each other. The directions of inclination between the two cones 114 are also opposite.

Of course, in this embodiment, the number of the hob 111 , the cone 114 and the bucket teeth 112 is not limited to the above method. One cutter among the wheel 114 and the bucket teeth 112 is provided with only one cutter, and the other cutters are provided with multiple ones, or two cutters among the hob 111, the cone 114 and the bucket teeth 112 are provided with only one cutter, and the other cutter is provided with only one cutter. There are many, as long as the annular cutter head 12 can be provided with hob 111, cone 114 and bucket teeth 112, the design concept of the present invention can also be realized, which should belong to the protection scope of the present invention.

When working, the hob 111 first contacts the rock. Because the shaft of the hob 111 can withstand a large radial pressure, it is pre-broken in the radial direction. After the hob 111 is subjected to the radial pressure, the hob 111 will generate a large pressure on the rock formation, and the rock formation is affected by the hob. After 111 is pressed, cracks will occur to achieve pre-broken. The roller cone 114 continues to follow up, and the rock formation is ground, knocked and broken by the revolution of the drill bit 1 and the rotation of the roller cone 114 . The follow-up of the bucket teeth 112 mainly prevents the secondary grinding of drilling slag caused by the debris generated after the cutting of the cone 114 and the pick 113, and the bucket teeth 112 need to remove the cutting debris in the annular groove; The rock drill bit 1 can increase the efficiency of rock penetration, reduce the wear of the drill bit 1, and improve the service life of the drill bit 1. It is found through experiments that the drill bit 1 provided in this embodiment can improve 1-2 times compared with the existing single drill bit 1. construction efficiency.

As shown in the drawings, the outer wall of the drill barrel 11 is provided with a helical blade 115, after the bucket teeth 112 clean and remove the slag from the rock broken by the hob 111 and the roller cone 114.

As shown in FIG. 1 and FIG. 3 , one end of the drill barrel 11 is provided with an end cover 116 , and the end cover 116 is provided with a connecting portion 117 . The head is connected, the power head drives the drill rod to rotate, and the drill rod is connected with the connecting part 117 to drive the drill barrel 11 to rotate, thereby realizing the cutting and crushing operation of the rock by the cutter on the end face of the drill barrel 11 .

Embodiment 2

The technical solutions of this embodiment and the first embodiment are basically the same, the main difference is that the drill includes a pick 113, that is, in this embodiment, the drill is a pick 113, that is, in this embodiment, the ring The cutter head 12 is provided with a hob 111 , a bucket tooth 112 and a pick 113 , wherein at least one of the hob 111 , the bucket tooth 112 and the pick 113 is provided.

As shown in FIG. 4 to FIG. 6 , there are multiple hob cutters 111 , bucket teeth 112 and pick teeth 113 , and multiple hob cutters 111 , multiple bucket teeth 112 and multiple pick teeth are provided. 113 are spaced and evenly distributed on the annular cutter head 12; the diameter of the cutting track of the pick 113 is larger than the outer diameter of the rotation track of the tool holder.

Preferably, as shown in FIG. 4 to FIG. 6 , there are two bucket teeth 112 , and two bucket teeth 112 are arranged symmetrically about the axis of the drill barrel 11 , that is, the hob 111 is provided with six , the six said hob 111 are arranged opposite to each other, and the central angle of the adjacent two hob 111 is 60°, that is, the six said hob 111 are spaced and evenly distributed on the end face of the annular cutter disc 12, The picks appear in pairs, and the two picks 113 in the same pick 113 group are inclined in opposite directions, one of which is inclined inward, and the other is inclined outward, and the inclination direction between two adjacent picks 113 Also the opposite.

Of course, in this embodiment, the number of the hob 111 , the pick 113 and the bucket teeth 112 is not limited to the above method, as long as the annular cutter head 12 can be provided with three hob 111 , pick 113 and bucket teeth 112 This kind of tool can also realize the design idea of the present invention, which should belong to the protection scope of the present invention.

For hard rock drilling operations, the hob 111 first contacts the rock. Because the shaft of the hob 111 can withstand a large radial pressure, it is pre-broken in the radial direction. If the rock formation is pressed by the hob 111, cracks will occur to achieve pre-breakage. Cracks have been generated by the rolling of the hob 111, and the picks 113 can easily dive into the crevice of the rock formation, causing crushing and crushing of the rock formation. The follow-up of the bucket teeth 112 mainly prevents the debris generated after the cutting of the pick 113 from causing the secondary grinding of the drilling slag. The new rock drilling bit 1 of the rotary drilling rig provided in this embodiment can increase the rock penetration efficiency, reduce the wear of the drill bit 1, and improve the service life of the drill bit 1. It is found through experiments that the drill bit 1 provided in this embodiment is different from the existing single drill bit 1. In comparison, the construction efficiency can be improved by 1-2 times.

Embodiment 3

The technical solution of this embodiment is basically the same as that of the first embodiment. The main difference is that the drill includes a pick 113 and a cone 114. That is, in this embodiment, the annular cutter head 12 is provided with hob 111, Bucket teeth 112 , cones 114 and picks 113 .

Optionally, as shown in FIG. 7 to FIG. 9 , in this embodiment, there are multiple hob cutters 111 , bucket teeth 112 , pick teeth 113 and roller cones 114 , and a plurality of the hob cutters 111 , multiple The bucket teeth 112, the picks 113 and the cones 114 are spaced and evenly distributed on the annular cutter head 12; The outer diameter of the rotational trajectory of the tool holder.

Preferably, in this embodiment, two bucket teeth 112 are provided, four hob cutters 111 are provided, eight tooth rollers 114 are provided, and twelve pick teeth 113 are provided; As shown in FIG. 7 to FIG. 9 , the picks 113 are inclined with respect to the end face of the annular cutter head 12 , and two picks 113 with opposite inclination directions form a group of picks 113 , and the picks 113 The two picks 113 in the group are symmetrical with respect to the axis of the drill barrel 11; the cones 114 are inclined with respect to the end face of the annular cutter head 12, and the two cones 114 with opposite inclination directions A set of cones 114 is formed, and the two cones 114 in the set of cones 114 are symmetrical with respect to the axis of the drill barrel 11; as shown in FIG. 7 to FIG. 9 , the bucket teeth 112 are provided with two Two of the bucket teeth 112 are symmetrically arranged with respect to the axis of the drill barrel 11 , and four of the hob cutters 111 are provided, and the four hob cutters 111 are arranged opposite to each other, and two hob cutters are adjacent to each other. The central angle of 111 is 90°, that is, the four hob cutters 111 are spaced apart and evenly distributed on the end face of the annular cutter head 12. At this time, the end face of the drill bit 1 is divided into four areas by the four hob cutters 111, and The number of the rollers 114 is eight, the number of picks 113 is twelve, and the end face of the annular cutter head 12 is divided into four areas by the hob 111, and each area is provided with two teeth. The wheel 114 and the three said picks 113 are symmetrically arranged in two groups of four pairs of rollers 114, and the two rollers 114 in the same group of rollers 114 are inclined in opposite directions, one of which is inclined inward and the other is inclined outwardly. , the inclination directions between the two adjacent tooth rollers 114 are also opposite; the six pairs of picks 113 are symmetrically arranged in pairs, and the two picks 113 in the same group of picks 113 are inclined in opposite directions, and one of them is inclined inward , the other is inclined outward, and the inclination directions between two adjacent picks 113 are also opposite.

It should be noted that the bucket teeth 112 , hob cutters 111 , pick teeth 113 and cones 114 in this embodiment are not limited to the above-mentioned numbers, as long as the annular cutter head 12 is provided with bucket teeth 112 , hob cutters as above, 111. The pick 113 and the cone 114 can also realize the design idea of the present invention, which should belong to the protection scope of the present invention.

For hard rock drilling operations, the hob 111 first contacts the rock. Because the shaft of the hob 111 can withstand a large radial pressure, it is pre-broken in the radial direction. If the rock layer is pressed by the hob 111, cracks will occur and pre-breakage will be realized. The roller cone 114 continues to follow up, and through the revolution of the drill bit 1 and the rotation of the roller cone 114, the rock formation is ground, knocked and broken. Cracks have been generated by the rolling of the hob 111, and the picks 113 can easily dive into the crevice of the rock formation, causing crushing and crushing of the rock formation. The follow-up of the bucket teeth 112 is mainly to prevent the debris generated by the cone 114 and the pick 113 from cutting the secondary grinding of the drilling slag. The bucket teeth 112 need to remove the cutting debris in the ring groove and discharge the debris through the spiral sheet 115 of the cylinder wall. Chips; compared with the existing single drill bit 1, the drill bit 1 provided by the present application can be applied to the construction of rock formations with different geology, has a wider application range, and has a higher rock entry efficiency.

Embodiment 4

This embodiment provides a rotary drilling rig using the rotary drilling rig drilling bit 1 described in Embodiment 1, Embodiment 2 or Embodiment 3. The rotary drilling rig provided in this embodiment can be applied to soft ground, hard It is suitable for various working environments such as strata, and has high drilling efficiency and high core drilling efficiency.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, It is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installation", "communication" and "connection" should be understood in a broad sense unless otherwise expressly specified and limited. For example, it may be a fixed connection or a detachable connection. Connection, or integral connection; may be mechanical connection or electrical connection; may be direct communication, or indirect communication through an intermediate medium, and may be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations. Also, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (10)

1. a rotary drilling rig into a rock drill bit, is characterized in that: comprise drill pipe, annular cutter head and cutter; The drill barrel is a cylindrical structure with a hollow cavity formed inside, an end cover is provided on one end of the drill barrel, and a connecting portion is provided on the end cover, and the other end of the drill barrel is an open structure, and the drill barrel has an opening structure. The annular cutter head is arranged on the open end of the drill barrel; the cutter is arranged on the annular cutter head; The cutter comprises a hob, bucket teeth and a drill, the drill is a pick and/or a roller, and the height of the hob is greater than the height of the drill and the bucket. 2 . The rock drilling bit of a rotary drilling rig according to claim 1 , wherein at least one hob and at least one bucket tooth are provided on the annular cutter head; A tool holder, the hob is installed in the tool holder. 3 . The rock drilling bit of a rotary drilling rig according to claim 2 , wherein the drill bit is at least one cone set on the annular cutter head. 4 . 4 . The rock drilling bit of a rotary drilling rig according to claim 3 , wherein: the annular cutter head is provided with a plurality of hob, a plurality of bucket teeth and a plurality of the rollers; a plurality of the The hob, the plurality of bucket teeth and the plurality of rollers are spaced and evenly distributed on the annular cutter head; the diameter of the cutting track of the rollers is larger than the outer diameter of the rotation track of the tool holder. 5 . The rock drilling bit of a rotary drilling rig according to claim 2 , wherein the drill bit is at least one pick set on the annular cutter head. 6 . 6 . The rock drilling bit of a rotary drilling rig according to claim 5 , wherein the annular cutter head is provided with a plurality of hob cutters, a plurality of bucket teeth and a plurality of the picks; a plurality of the The hob, a plurality of the bucket teeth and the plurality of the picks are spaced and evenly distributed on the annular cutter head; the diameter of the cutting track of the picks is larger than the outer diameter of the rotation track of the tool holder. 7 . The rock drilling bit of a rotary drilling rig according to claim 2 , wherein the drill bit comprises at least one cone and at least one pick set on the annular cutter head. 8 . 8 . The rock drilling bit of a rotary drilling rig according to claim 7 , wherein the annular cutter head is provided with a plurality of hob cutters, a plurality of bucket teeth, a plurality of cones and a plurality of the pick teeth. 9 . ; A plurality of the hob, a plurality of the bucket teeth, a plurality of the cones and a plurality of the picks are spaced and evenly distributed on the annular cutter head; the cutting track of the cones and the The diameter of the cutting track of the pick is larger than the outer diameter of the rotation track of the tool holder. 9 . The rock drilling bit of a rotary drilling rig according to claim 1 , wherein the outer wall of the drill barrel is provided with a helical blade. 10 . 10. A rotary drilling rig, characterized in that it comprises the rock drilling bit of the rotary drilling rig according to any one of claims 1 to 9.

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