Non-return drill rod for coal exploration

Abstract

The utility model discloses a non-return drill rod for coal exploration, which comprises a first non-return drill rod, the tail part of the first non-return drill rod is in threaded connection with a first connecting piece, and a second connecting piece is sleeved in the first connecting piece. When the non-return drill rod needs to be connected, the tail part of the first non-return drill rod is mounted on the first connecting piece in a threaded manner; then the head of a second non-return drill rod is connected to a second connecting piece in a threaded mode, then a worker pushes the clamping ring towards the first non-return drill rod with one hand, the second connecting piece is inserted into the first connecting piece with the other hand, the steel balls fall into the bearing groove in the insertion process, then the clamping ring is released, and the second non-return drill rod is inserted into the second connecting piece; the spring pushes the clamping ring to move towards the direction of the second connecting piece, so that the steel ball is limited in the bearing groove by the limiting ring, the connection of the first non-return drill rod and the second non-return drill rod is completed, the connection operation is simple and efficient, the non-return drill rods do not need to be in threaded connection during exploration every time, and the working efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of backstopping drill rod, especially to a backstopping drill rod for coal exploration. BACKGROUND

[0002] Drill rods are widely used in exploration holes and observation holes of mineral resources, and the environment of the drill rod is harsh when drilling, and the drill rod needs to withstand high temperature, high pressure, medium corrosion and high torque. When the drill rod is working, the drill bit needs to be provided with drilling fluid to reduce the temperature of the drill rod and the drill bit, provide power source for the drill bit, and improve the efficiency of the drill bit. When the drilling is stopped or the pressure of underground water is greater than the pressure of the drilling fluid, the pressure of the drilling fluid at the bottom of the well is greater than the liquid inlet pressure of the drilling fluid in the backstopping drill rod, and the drilling fluid will flow back in the drill rod. The backflow of the drilling fluid will cause damage to the impeller of the water supply pump of the drilling fluid. When the drill bit is still working, the drill bit cannot be sufficiently cooled, and works under high temperature adjustment, which burns out the drill bit. At the same time, the drill rod cannot be cooled under high-strength working adjustment, and is prone to deformation and breakage.

[0003] The utility model of a kind of coal exploration backstopping drill rod is disclosed in the utility model with publication No.

[0004] During coal exploration, several backstopping drill rods need to be connected. The backstopping drill rod connection of the utility model is connected by the head of the previous backstopping drill rod and the tail of the next backstopping drill rod. For coal exploration, a large number of backstopping drill rod connections are needed for each exploration. The threaded connection method is complicated to operate, time-consuming, and has low work efficiency. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a backstopping drill rod for coal exploration to solve the problem of a large number of backstopping drill rod connections needed for each exploration, complicated threaded connection method, time-consuming operation, and low work efficiency.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: A reverse drilling rod for coal exploration, first reverse drilling rod's tail part is connected on the first connecting piece, the first connecting piece is sleeved with the second connecting piece, the second connecting piece is away from the first connecting piece one end is connected with the head of second reverse drilling rod, the first connecting piece is sleeved with spring, the periphery of spring is provided with snap ring, the inner wall of snap ring is installed with limit ring, the inner wall of limit ring is in contact with the first connecting piece, a plurality of steel ball grooves are seted up on the first connecting piece, a plurality of steel ball grooves are all installed with steel ball, the second connecting piece is seted up with the receiving groove, and the position of receiving groove corresponds with steel ball.

[0007] Preferably, the first connecting piece is provided with an annular groove, the annular groove penetrates the end of the first connecting piece away from the first reverse drilling rod, and the position of the annular groove corresponds to the spring.

[0008] Preferably, the tail part of the first reverse drilling rod and the second reverse drilling rod is provided with a first connecting groove, the first connecting groove is provided with a first thread, and the end of the first connecting piece close to the first reverse drilling rod is provided with a threaded groove.

[0009] Preferably, the head of the first reverse drilling rod and the second reverse drilling rod is provided with a second threaded groove, and the end of the second connecting piece close to the second reverse drilling rod is provided with a second thread.

[0010] Preferably, the first connecting piece and the second connecting piece are provided with a second connecting groove, the two second connecting grooves are oppositely arranged, and the same sealing ring is rotatably connected to the two connecting grooves.

[0011] Preferably, the outer diameter length of the first reverse drilling rod and the second reverse drilling rod is same with the outer diameter length of the snap ring, and the end of the snap ring away from the first reverse drilling rod is in contact with the second reverse drilling rod.

[0012] Preferably, the tail part of the first reverse drilling rod and the second reverse drilling rod is provided with a sliding groove.

[0013] Preferably, the head of the first reverse drilling rod, the second reverse drilling rod and the first connecting piece are all clamped with a rubber pad.

[0014] The utility model has the advantages that:

[0015] The utility model discloses a kind of coal exploration reverse circulation drill pipes, including first reverse circulation drill pipe, first connecting piece, second connecting piece and second reverse circulation drill pipe, first reverse circulation drill pipe is connected with first connecting piece, and second reverse circulation drill pipe is connected with second connecting piece, first reverse circulation drill pipe and second reverse circulation drill pipe are connected by first connecting piece and second connecting piece. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A kind of coal exploration reverse circulation drill pipe's three-dimensional structure schematic diagram is proposed in the utility model;

[0017] Figure 2 A kind of coal exploration reverse circulation drill pipe's section structure schematic diagram is proposed in the utility model;

[0018] Figure 3 A kind of coal exploration reverse circulation drill pipe's A place enlarged structure schematic diagram is proposed in the utility model;

[0019] Figure 4 A kind of coal exploration reverse circulation drill pipe's B place enlarged structure schematic diagram is proposed in the utility model.

[0020] In the drawing: 1, first reverse circulation drill pipe;2, first connecting piece;3, second connecting piece;4, second reverse circulation drill pipe;5, spring;6, snap ring;7, limit ring;8, steel ball;9, steel ball groove;10, annular groove;11, sliding groove;12, first connecting groove;13, first thread;14, first thread groove;15, second thread groove;16, second thread;17, second connecting groove;18, sealing ring;19, receiving groove;20, rubber pad. DETAILED DESCRIPTION

[0021] The technical scheme in the utility model embodiment will be clearly and completely described below in conjunction with the drawings in the utility model embodiment, obviously, the described embodiment is only a part of the utility model embodiment, not all embodiments.

[0022] Specifically, one kind is to explore the non-return drill rod with coal, including first non-return drill rod 1, the tail of first non-return drill rod 1 is threadedly connected on first connecting piece 2, first connecting piece 2 is sleeved with second connecting piece 3 in, the end of second connecting piece 3 away from first connecting piece 2 is threadedly connected with the head of second non-return drill rod 4, spring 5 is sleeved on first connecting piece 2, the periphery of spring 5 is provided with snap ring 6, the inner wall of snap ring 6 is installed with limit ring 7, the inner wall of limit ring 7 is in contact with first connecting piece 2, a plurality of steel ball grooves 9 are formed in first connecting piece 2, a plurality of steel balls 8 are rotatably installed in a plurality of steel ball grooves 9, and a receiving groove 19 is formed in second connecting piece 3, and the position of the receiving groove 19 corresponds to the steel ball 8.

[0023] When the non-return drill rod needs to be connected, the tail of the first non-return drill rod 1 is threadedly connected on the first connecting piece 2, and then the head of the second non-return drill rod 2 is threadedly connected on the end of the second connecting piece 3 away from the first connecting piece 2. Then, the worker pushes the snap ring 6 towards the first non-return drill rod 1 with one hand, and inserts the second connecting piece 3 into the first connecting piece 2 with the other hand. During the insertion process, the steel ball 8 falls into the receiving groove 19. Then, the snap ring 6 is released, and the spring 5 pushes the snap ring 6 to move towards the second connecting piece 3, so that the limit ring 7 limits the steel ball 8 in the receiving groove 19. Thus, the connection of the first non-return drill rod 1 and the second non-return drill rod 4 is completed. This connection operation is simple and efficient, and there is no need to threadedly connect the non-return drill rod every time during exploration, which greatly improves the work efficiency.

[0024] Specifically, in the present embodiment, an annular groove 10 is formed in the first connecting piece 2, the annular groove 10 penetrates through the end of the first connecting piece 2 away from the first non-return drill rod 1, and the position of the annular groove 10 corresponds to the spring 5, so that the spring 5 can be sleeved between the first connecting piece 2 and the snap ring 6 through the annular groove 10.

[0025] Specifically, in the present embodiment, the tail of the first non-return drill rod 1 and the second non-return drill rod 4 is provided with a first connecting groove 12, the first connecting groove 12 is provided with a first thread 13, and the end of the first connecting piece 2 close to the first non-return drill rod 1 is provided with a threaded groove 14, so that the first non-return drill rod 1 can be threadedly connected on the first connecting piece 2 through the cooperation of the first thread 13 and the first threaded groove 14.

[0026] Specifically, in the present embodiment, the head of the first non-return drill rod 1 and the second non-return drill rod 4 is provided with a second threaded groove 15, and the end of the second connecting piece 3 close to the second non-return drill rod 4 is provided with a second thread 16, so that the second non-return drill rod 4 can be threadedly connected on the second connecting piece 4 through the cooperation of the second thread 16 and the second threaded groove 15.

[0027] Specifically, in the embodiment, the first connecting piece 2 and the second connecting piece 3 are both provided with a second connecting groove 17, the two second connecting grooves 17 are oppositely arranged, and the same sealing ring 18 is rollingly connected on the two second connecting grooves 17, so that the first connecting piece 2 and the second connecting piece 3 can form a sealed space under the joint action of the second connecting grooves 17 and the sealing ring 18, thereby preventing underground water from entering the first connecting piece 2 and the second connecting piece 3 through the gap between the first connecting piece 2 and the second connecting piece 3.

[0028] Specifically, in the embodiment, the outer diameter length of the first reverse prevention drill rod 1 and the second reverse prevention drill rod 4 is the same as the outer diameter length of the snap ring 6, and the end of the snap ring 6 away from the first reverse prevention drill rod 1 is in contact with the second reverse prevention drill rod 4. During the exploration of coal, when the connected reverse prevention drill rod is inserted into the soil, the snap ring 6 is abutted by the second reverse prevention drill rod 4, so that the snap ring 6 is not affected by the thrust of the soil, and the movement of the snap ring 6 to the second reverse prevention drill rod 4 is avoided, thereby avoiding the unstable connection of the first reverse prevention drill rod 1 and the second reverse prevention drill rod 4.

[0029] Specifically, in the embodiment, the tail part of the first reverse prevention drill rod 1 and the second reverse prevention drill rod 4 is provided with a sliding groove 11, so that the snap ring 6 can slide on the first reverse prevention drill rod 1 through the sliding groove 11.

[0030] Specifically, in the embodiment, the head part of the first reverse prevention drill rod 1 and the second reverse prevention drill rod 4 and the first connecting piece 2 are all clamped with a rubber pad 20, so that there is no gap between the first reverse prevention drill rod 1 and the first connecting piece 2 and between the second reverse prevention drill rod 4 and the second connecting piece 3, and underground water cannot enter the reverse prevention drill rod.

[0031] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A check drill pipe for coal exploration, comprising a first check drill pipe (1), characterized in that: The tail of the first non-reverse drill rod (1) is threadedly connected to the first connecting piece (2), the second connecting piece (3) is sleeved in the first connecting piece (2), the head of the second non-reverse drill rod (4) is threadedly connected to the end of the second connecting piece (3) away from the first connecting piece (2), the spring (5) is sleeved on the first connecting piece (2), the clasp ring (6) is arranged on the periphery of the spring (5), the limiting ring (7) is mounted on the inner wall of the clasp ring (6), the inner wall of the limiting ring (7) is in contact with the first connecting piece (2), a plurality of steel ball grooves (9) are formed in the first connecting piece (2), and the steel balls (8) are rollingly mounted in the steel ball grooves (9), and the receiving groove (19) is formed in the second connecting piece (3) and corresponds to the position of the steel ball (8).

2. A check valve drill rod for coal exploration as claimed in claim 1 wherein: The annular groove (10) is formed in the first connecting piece (2) and penetrates the end of the first connecting piece (2) away from the first non-reverse drill rod (1), and the annular groove (10) corresponds to the position of the spring (5).

3. A check valve drill rod for coal exploration as claimed in claim 1, wherein: The tail of the first non-reverse drill rod (1) and the second non-reverse drill rod (4) are provided with the first connecting groove (12), and the first threaded hole (13) is mounted on the first connecting groove (12).

4. The non-return drill rod for coal exploration according to claim 1, characterized in that: The head of the first non-reverse drill rod (1) and the second non-reverse drill rod (4) are provided with the second threaded groove (15), and the second threaded hole (16) is mounted on the end of the second connecting piece (3) close to the second non-reverse drill rod (4).

5. A check valve drill rod for coal exploration as claimed in claim 1, wherein: The second connecting grooves (17) are formed in the first connecting piece (2) and the second connecting piece (3), the two second connecting grooves (17) are oppositely arranged, and the same sealing ring (18) is rollingly connected to the two connecting grooves (17).

6. A check valve drill rod for coal exploration as claimed in claim 1, wherein: The outer diameter length of the first non-reverse drill rod (1) and the second non-reverse drill rod (4) is the same as the outer diameter length of the clasp ring (6), and the end of the clasp ring (6) away from the first non-reverse drill rod (1) is in contact with the second non-reverse drill rod (4).

7. A check valve drill rod for coal exploration as claimed in claim 1, wherein: The sliding grooves (11) are formed in the tail of the first non-reverse drill rod (1) and the second non-reverse drill rod (4).

8. A check valve drill rod for coal exploration as claimed in claim 1, wherein: The rubber pads (20) are clamped in the head of the first non-reverse drill rod (1), the second non-reverse drill rod (4) and the first connecting piece (2).

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