CN215485902U

CN215485902U - Alloy wear-resistant drill rod for coal mining

Info

Publication number: CN215485902U
Application number: CN202121319856.7U
Authority: CN
Inventors: 卢兵; 卢晓凯
Original assignee: Lu Xiaokai
Current assignee: Lu Xiaokai
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2022-01-11
Anticipated expiration: 2031-06-15

Abstract

The utility model discloses an alloy wear-resistant drill rod for coal mining, which comprises a rod body, wherein a male nut head is arranged at one end of the rod body, a through cavity is arranged in the rod body, the through cavity penetrates through the male nut head, a sleeve is arranged in the male nut head and positioned on the outer side surface of the through cavity, the sleeve is communicated with the through cavity, a first external thread is arranged on the outer side surface of the sleeve, a first internal thread is arranged in the male nut head, a second external thread in threaded connection with the male nut head is arranged on the outer side surface of one end, away from the male nut head, of the rod body, a second internal thread in threaded connection with the sleeve is arranged on the inner side surface of one end, away from the male nut head, of the rod body, a plurality of through holes are uniformly distributed along the periphery of the inner side surface of the male nut head and positioned on the outer side surface of the sleeve, the through holes extend through the rod body and penetrate through the whole rod body, a connecting piece is arranged in the through holes, a male buckle and a female buckle matched with the male buckle are arranged at two ends of the connecting piece, and a spiral line bulge is arranged on the outer side surface of the rod body. The utility model has the advantages that: the hidden danger of fracture is reduced, and the connection is conveniently searched.

Description

Alloy wear-resistant drill rod for coal mining

Technical Field

The utility model relates to the technical field of coal mining, in particular to an alloy wear-resistant drill rod for coal mining.

Background

The drill rod is a steel pipe with threads at the tail part and is used for connecting surface equipment of a drilling machine and drilling and grinding equipment or a bottom hole device at the bottom end of a drilled well. The purpose of the drill pipe is to carry drilling mud to the drill bit and, together with the drill bit, raise, lower or rotate the bottom hole assembly. The drill pipe must be able to withstand large internal and external pressures, twists, bends and vibrations. In the process of oil and gas exploitation and extraction, the drill pipe can be used for multiple times. The drill rods are divided into a kelly, a drill rod and a weighted drill rod. The connection sequence is square drill rod (1), drill rod (n, determined by well depth), weighted drill rod (n, determined by drill tool combination design).

However, the drill rod is continuously contacted and rubbed with the well wall or the casing in the drilling process to generate abrasion, so that the drilling accidents such as drill rod breakage, tripping and the like are caused by the abrasion of the joint, after the accidents occur, the drilling work is delayed, and the broken drill rod and the broken drill bit need to be found out, which is very troublesome.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and provides an alloy wear-resistant drill rod for coal mining, which reduces the hidden danger of fracture and is convenient to connect and search.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows: the alloy wear-resistant drill rod for coal mining comprises a rod body, wherein one end of the rod body is provided with a male nut head, a through cavity is arranged in the rod body, the through cavity penetrates through the male nut head, a sleeve is arranged in the male nut head and positioned on the outer side surface of the through cavity and communicated with the through cavity, a first external thread is arranged on the outer side surface of the sleeve, a first internal thread is arranged in the male nut head, a second external thread in threaded connection with the male nut head is arranged on the outer side surface of one end, away from the male nut head, of the rod body, a second internal thread in threaded connection with the sleeve is arranged on the inner side surface of one end, away from the male nut head, of the rod body, a plurality of through holes are uniformly distributed on the inner side surface of the male nut head and positioned on the outer side surface of the sleeve along the circumference, the through holes extend through the rod body and penetrate through the whole rod body, a connecting piece is arranged in each through hole, and male and female buckles and mutually matched with buckles are arranged at the two ends of the connecting piece extending out of the through holes, the body of rod lateral surface is equipped with the spiral line arch, the bellied spiral diameter of spiral line is located to increase gradually from centre to both ends, the spiral diameter at the bellied both ends of spiral line is the same with public nut head external diameter.

Compared with the prior art, the utility model has the advantages that: the product of the utility model is connected through double screw threads, so that the connection is more stable, stress damage is not easy to generate, the spiral thread bulge is arranged on the outer side surface of the rod body, the connection transition effect with a male nut head can be realized, the wear resistance of the rod body can be increased, the spiral thread is also beneficial to being matched with the rotation and drilling underground, the friction of a well wall or a sleeve is reduced, the rod body can be connected together through the arranged connecting piece, if the rod body is broken, the whole drill rod and the drill bit cannot be broken and separated, the whole drilling equipment can be conveniently lifted out of a well, the maintenance is convenient, and the drilling equipment which needs manpower to exercise in Xuzhou is not needed.

As an improvement, the inner side surface of the male nut head is provided with a wear-resistant pad positioned on the outer side surface of the sleeve, so that the connection tightness between the upper drill rod and the lower drill rod is improved.

As the improvement, be equipped with the buffering space between first internal thread and the internal bottom surface of public nut head, be convenient for hold connecting piece, pin thread and box.

As the improvement, the connecting piece is a steel bar rope, and is firm and durable.

As an improvement, the outer side surface of the rod body and the inner side surface of the through hole are both provided with wear-resistant aluminum-silicon alloy layers which are wear-resistant.

As an improvement, the spiral thread bulges are at least two, and are parallel to each other, so that the more the wear resistance is, the higher the wear resistance is.

As an improvement, the thickness of the wear-resistant aluminum-silicon alloy layer on the inner side surface of the through hole is gradually increased from one end to the other end, the thicker end is positioned at the upper end of the well, and drilling fluid is poured in from the upper end, so that the flushing overlooking time of the drilling fluid can be prolonged a little, and the service life is prolonged.

Drawings

FIG. 1 is a schematic structural diagram of an alloy wear-resistant drill rod for coal mining according to the present invention.

FIG. 2 is a schematic structural diagram of the alloy wear-resistant drill rod for coal mining, which is connected with other rod bodies.

FIG. 3 is a schematic top view of an alloy wear-resistant drill pipe for coal mining according to the present invention.

As shown in the figure: 1. the body of rod, 2, the public nut head, 3, lead to the chamber, 4, sleeve, 5, first external screw thread, 6, first internal thread, 7, second external screw thread, 8, second internal thread, 9, through-hole, 10, connecting piece, 11, pin, 12, box, 13, the spiral line is protruding, 14, wear pad, 15, buffering space, 16, wear-resisting aluminium-silicon alloy layer.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

With reference to the attached

drawings

1, 2 and 3, an alloy wear-resistant drill rod for coal mining is provided, which comprises a rod body 1, wherein one end of the rod body 1 is provided with a male nut head 2, a through cavity 3 is arranged in the rod body 1, the through cavity 3 penetrates through the male nut head 2, a sleeve 4 is arranged in the male nut head 2 and positioned on the outer side surface of the through cavity 3, the sleeve 4 is communicated with the through cavity 3, the outer side surface of the sleeve 4 is provided with a first external thread 5, a first internal thread 6 is arranged in the male nut head 2, a second external thread 7 in threaded connection with the male nut head 2 is arranged on the outer side surface of one end of the rod body 1, which is far away from the male nut head 2, a second internal thread 8 in threaded connection with the sleeve 4 is arranged on the inner side surface of one end of the rod body 1, a plurality of through holes 9 are uniformly distributed on the outer side surface of the sleeve 4 along the circumference, the through holes 9 extend the rod body 1 and penetrate through the whole rod body 1, be equipped with connecting piece 10 in the through-hole 9, connecting piece 10 extends the both ends of through-hole 9 and is equipped with pin 11 and box 12 of mutually supporting the buckle, 1 lateral surface of the body of rod is equipped with the spiral line arch 13, the spiral diameter of spiral line arch 13 increases gradually from centre to both ends, the spiral diameter at the protruding 13 both ends of spiral line is the same with 2 external diameters of pin nut head.

And a wear-resistant pad 14 is arranged on the inner side surface of the male nut head 2 and on the outer side surface of the sleeve 4.

And a buffer gap 15 is arranged between the first internal thread 6 and the inner bottom surface of the male nut head 2.

The connecting piece 10 is a steel bar rope.

And wear-resistant aluminum-silicon alloy layers 16 are arranged on the outer side surface of the rod body 1 and the inner side surface of the through hole 9.

At least two spiral thread protrusions 13 are arranged, and the spiral thread protrusions 13 are parallel to each other.

The thickness of the wear-resistant aluminum-silicon alloy layer 16 on the inner side surface of the through hole 9 gradually increases from one end to the other end.

When the drilling rod is implemented specifically, an upper drilling rod and a lower drilling rod are connected through a male buckle 11 and a female buckle 12 of a connecting piece 10, and then are matched with each other through a first external thread 5, a first internal thread 6, a second external thread 7 and a second internal thread 8, so that the rod body 1 and an adjacent male nut head 2 are in threaded connection to form the drilling rod; the product of the utility model is connected through double screw threads, so that the connection is more stable, stress damage is not easy to generate, the spiral thread bulge 13 is arranged on the outer side surface of the rod body 1, the connection transition effect with the male nut head 2 can be realized, the wear resistance of the rod body 1 can be increased, the spiral thread is also beneficial to being matched with rotation and drilling underground, the friction of a well wall or a casing pipe is reduced, the rod body 1 can be connected together through the arranged connecting piece 10, if one rod body 1 is broken or a plurality of rod bodies are broken, the whole drill rod and the drill bit cannot be broken and separated, the whole drilling equipment can be conveniently lifted out of a well, the maintenance is convenient, and the drilling equipment which consumes manpower to remove slow exercise is not needed.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The wear-resisting alloy drill rod for coal mining is characterized in that: comprises a rod body (1), wherein one end of the rod body (1) is provided with a male nut head (2), a through cavity (3) is arranged in the rod body (1), the through cavity (3) runs through the male nut head (2), a sleeve (4) is arranged in the male nut head (2) and positioned on the outer side surface of the through cavity (3), the sleeve (4) is communicated with the through cavity (3), a first external thread (5) is arranged on the outer side surface of the sleeve (4), a first internal thread (6) is arranged in the male nut head (2), a second external thread (7) in threaded connection with the male nut head (2) is arranged on the outer side surface of one end of the rod body (1) far away from the male nut head (2), a second internal thread (8) in threaded connection with the sleeve (4) is arranged on the inner side surface of one end of the rod body (1), a plurality of through holes (9) are uniformly distributed on the outer side surface of the male nut head (2) and positioned on the sleeve (4), through-hole (9) extend the body of rod (1) and run through whole body of rod (1), be equipped with connecting piece (10) in through-hole (9), connecting piece (10) are extended the both ends of through-hole (9) and are equipped with pin thread (11) and box (12) of mutually supporting buckle, body of rod (1) lateral surface is equipped with the spiral line arch (13), the spiral diameter of spiral line arch (13) is located to increase gradually from centre to both ends, the spiral diameter at the protruding (13) both ends of spiral line is the same with pin nut head (2) outer diameter.

2. The wear-resistant alloy drill pipe for coal mining use of claim 1, wherein: and a wear-resistant pad (14) is arranged on the inner side surface of the male nut head (2) and on the outer side surface of the sleeve (4).

3. The wear-resistant alloy drill pipe for coal mining use of claim 1, wherein: a buffer gap (15) is arranged between the first internal thread (6) and the inner bottom surface of the male nut head (2).

4. The wear-resistant alloy drill pipe for coal mining use of claim 1, wherein: the connecting piece (10) is a steel bar rope.

5. The wear-resistant alloy drill pipe for coal mining use of claim 1, wherein: and wear-resistant aluminum-silicon alloy layers (16) are arranged on the outer side surface of the rod body (1) and the inner side surface of the through hole (9).

6. The wear-resistant alloy drill pipe for coal mining use of claim 1, wherein: the number of the spiral thread bulges (13) is at least two, and the spiral thread bulges (13) are parallel to each other.

7. The wear-resistant alloy drill pipe for coal mining use of claim 5, wherein: the thickness of the wear-resistant aluminum-silicon alloy layer (16) on the inner side surface of the through hole (9) is gradually increased from one end to the other end.