CN213743316U - Large-diameter rope coring tool for coal bed gas well - Google Patents

Abstract

The utility model discloses a large-diameter rope coring tool for coal bed gas wells, which comprises a coring bit, wherein the top surface of the coring bit is provided with a drill tooth, one end of the drill tooth is provided with a positioning block, and one end of the positioning block is spliced with the coring bit through a positioning groove; the utility model discloses in, in stretching into the constant head tank that coring bit terminal surface corresponds the setting respectively through the locating piece with a plurality of brill teeth, make a plurality of brill teeth around distributing about the coring bit terminal surface, and through with holding ring and coring bit nested connection, then the constant head tank that extends to the coring bit through the depressed groove that fastening bolt runs through the holding ring outer lane, make fastening bolt's one end and the screw hole threaded connection on locating piece surface, the locking that the tooth was bored in the realization is fixed, adopt this kind of mode, make coring bit and the separation of brill tooth, be favorable to boring the dismantlement and the change of tooth, thereby avoid the condition that traditional integral type coring bit need change whole drill bit after serious wearing and tearing, thereby reduce the maintenance cost of coring bit.

Description

Large-diameter rope coring tool for coal bed gas well

Technical Field

The utility model relates to an oil and natural gas drilling engineering technical field especially relates to a coal bed gas well major diameter rope coring tool.

Background

Coal bed gas coring is one of important means for evaluating coal bed gas reserves, coal bed physical properties and fluid properties in coal beds, and has important guiding significance for reasonable development and exploitation of coal bed gas. The core-obtaining speed of the coal bed gas is high, so that the coal sample is kept in an original state as much as possible, and the loss of the coal bed gas is reduced. Based on the characteristics of coal bed gas coring, the coal bed gas coring tool generally adopts a rope type coring tool with short coring period and high coring speed.

When the coring bit of the large-diameter wire coring tool for the existing coal bed gas well is used, the coring bit is taken as a main drilling hole extending component of the wire coring tool, so that the drilling teeth of the coring bit are seriously abraded during operation, the whole coring bit is generally required to be directly replaced, and the investment cost is increased for the use of the coal bed gas coring tool.

Therefore, the large-diameter rope coring tool for the coal bed gas well has the advantage of being convenient for replacing the drill teeth of the coring bit, and further solves the problems in the background technology.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a large-diameter rope coring tool for a coal bed gas well.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a coal bed gas well major diameter rope coring tool, includes the coring bit, the top surface of coring bit is provided with bores the tooth, and the one end of boring the tooth is provided with the locating piece, the one end of locating piece is passed through the constant head tank and is pegged graft with the coring bit, and the surface of locating piece sets up threaded hole, the surperficial nested connection of coring bit has the holding ring, and the outer lane of holding ring sets up the depressed groove, be provided with fastening bolt in the depressed groove, and fastening bolt's one end runs through coring bit and screw hole threaded connection.

As a further description of the above technical solution: the drilling teeth are arranged in a plurality of numbers, the drilling teeth are distributed around the coring drill bit, and a plurality of positioning grooves are formed in the end face of the coring drill bit corresponding to the drilling teeth.

As a further description of the above technical solution: the cross-section of holding ring is isosceles trapezoid structure, and the outer lane of holding ring encircles and has seted up a plurality of depressed grooves.

As a further description of the above technical solution: the side of the coring bit is communicated with the positioning groove and is provided with a yielding hole.

As a further description of the above technical solution: the inner side surfaces of the plurality of concave grooves are provided with through holes corresponding to the fastening bolts.

As a further description of the above technical solution: the whole drilling tooth is of a fan-shaped structure, and the drilling tooth is made of diamond materials.

The utility model discloses following beneficial effect has:

in the utility model, the coring bit structure which is convenient for replacing the drill teeth is formed by adopting the coring bit, the positioning groove, the positioning ring, the fastening bolt, the drill teeth, the positioning block, the threaded hole and the concave groove, the positioning blocks of the plurality of drill teeth respectively extend into the positioning grooves correspondingly arranged on the end surface of the coring bit, so that the plurality of drill teeth are distributed around the end surface of the coring bit, and the positioning rings are connected with the coring bit in a nested way, then the fastening bolt penetrates through the concave groove of the outer ring of the positioning ring and extends to the positioning groove of the coring bit, one end of the fastening bolt is enabled to be in threaded connection with the threaded hole on the surface of the positioning block, the locking and fixing of the drill tooth are realized, the coring bit is separated from the drill tooth by adopting the mode, the disassembly and the replacement of the drill tooth are facilitated, thereby avoid the condition that traditional integral type coring bit need be changed whole drill bit after serious wearing and tearing to reduce coring bit's maintenance cost.

Drawings

Fig. 1 is a schematic structural view of a coring bit of a large-diameter rope coring tool for a coal bed gas well according to the present invention;

fig. 2 is a top view of a large diameter wireline coring tool for a coal bed gas well according to the present invention;

fig. 3 is the utility model discloses a coal bed gas well major diameter rope coring tool's bores tooth structural schematic.

Illustration of the drawings:

1. a coring bit; 2. positioning a groove; 3. a positioning ring; 4. fastening a bolt; 5. drilling teeth; 6. positioning blocks; 7. a threaded hole; 8. a recessed groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

According to the utility model discloses an embodiment provides a coal bed gas well major diameter rope coring tool.

Referring now to the drawings and the detailed description, as shown in fig. 1-3, a large-diameter rope coring tool for coal bed gas wells according to an embodiment of the present invention comprises a coring bit 1, wherein a drilling tooth 5 is disposed on the top surface of the coring bit 1, a positioning block 6 is disposed at one end of the drilling tooth 5, one end of the positioning block 6 is inserted into the coring bit 1 through a positioning groove 2, a threaded hole 7 is formed on the surface of the positioning block 6, a positioning ring 3 is nested on the surface of the coring bit 1, a recessed groove 8 is formed on the outer ring of the positioning ring 3, a fastening bolt 4 is disposed in the recessed groove 8, one end of the fastening bolt 4 penetrates through the coring bit 1 and is in threaded connection with the threaded hole 7, the positioning blocks 6 of a plurality of the drilling teeth 5 are respectively inserted into the positioning grooves 2 correspondingly disposed on the end surface of the coring bit 1, so as to cause the plurality of the drilling teeth 5 to be distributed around the end surface of the coring bit 1, the positioning ring 3 is connected with the coring bit 1 in a nested manner, then the fastening bolt 4 penetrates through the concave groove 8 of the outer ring of the positioning ring 3 and extends to the positioning groove 2 of the coring bit 1, one end of the fastening bolt 4 is enabled to be in threaded connection with the threaded hole 7 on the surface of the positioning block 6, locking and fixing of the drill tooth 5 are achieved, when the drill tooth 5 needs to be disassembled, one end of the fastening bolt 4 is enabled to be separated from the threaded hole 7 of the positioning block 6 by unlocking the fastening bolt 4 on the positioning ring 3, disassembly and replacement of the drill tooth 5 are facilitated, and therefore the situation that the whole drill bit needs to be replaced after the traditional integrated coring bit 1 is seriously worn is avoided, and the maintenance cost of the coring bit 1 is reduced;

in one embodiment, the drilling teeth 5 are provided in a plurality, and the plurality of drilling teeth 5 are distributed around the core bit 1, and the end surface of the core bit 1 is provided with a plurality of positioning grooves 2 corresponding to the drilling teeth 5, so that the plurality of drilling teeth 5 can be conveniently installed and fixed through the plurality of positioning grooves 2.

In one embodiment, the cross section of the positioning ring 3 is of an isosceles trapezoid structure, the outer ring of the positioning ring 3 is surrounded by a plurality of concave grooves 8, and the positioning ring 3 is of the isosceles trapezoid structure through the cross section, so that the matching degree of the positioning ring 3 and the coring bit 1 after installation is better, and the drilling smoothness of the coring bit 1 is guaranteed.

In one embodiment, the side of the coring bit 1 penetrates through the positioning groove 2 to form a yielding hole, and the fastening bolt 4 can conveniently extend into the positioning groove 2 through the yielding hole.

In one embodiment, the inner side surfaces of the plurality of concave grooves 8 are provided with through holes corresponding to the fastening bolts 4, so that the fastening bolts 4 can conveniently penetrate through the positioning ring 3 through the through holes, and the fixing of the drill teeth 5 is facilitated.

In one embodiment, the whole drilling teeth 5 are of a fan-shaped structure, the drilling teeth 5 are made of diamond, and the structural strength of the core bit 1 can be improved through the drilling teeth 5 made of diamond, so that the service life of the bit is guaranteed.

The working principle is as follows:

when in use, the positioning blocks 6 of the plurality of drill teeth 5 respectively extend into the positioning grooves 2 correspondingly arranged on the end surface of the coring bit 1, so that the plurality of drill teeth 5 are circularly distributed relative to the end surface of the coring bit 1, and the positioning ring 3 is nested with the coring bit 1, then the fastening bolt 4 penetrates through a concave groove 8 of the outer ring of the positioning ring 3 and extends to the positioning groove 2 of the coring bit 1, so that one end of the fastening bolt 4 is in threaded connection with a threaded hole 7 on the surface of the positioning block 6, the locking and fixing of the drill teeth 5 are realized, when the drill tooth 5 needs to be disassembled, one end of the fastening bolt 4 is separated from the threaded hole 7 of the positioning block 6 by unlocking the fastening bolt 4 on the positioning ring 3, which is beneficial to the disassembly and replacement of the drill tooth 5, thereby avoid the condition that needs to change whole drill bit after 1 serious wear of traditional integral type coring bit to reduce coring bit 1's maintenance cost.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims (6)

1. The utility model provides a coal bed gas well major diameter rope coring tool, includes coring bit (1), its characterized in that: the top surface of coring bit (1) is provided with bores tooth (5), and the one end of boring tooth (5) is provided with locating piece (6), the one end of locating piece (6) is passed through constant head tank (2) and is pegged graft with coring bit (1), and threaded hole (7) have been seted up on the surface of locating piece (6), the surperficial nested connection of coring bit (1) has holding ring (3), and the outer lane of holding ring (3) has seted up depressed groove (8), be provided with fastening bolt (4) in depressed groove (8), and the one end of fastening bolt (4) runs through coring bit (1) and threaded hole (7) threaded connection.

2. The coal bed gas well large diameter wireline coring tool of claim 1, wherein: the drilling teeth (5) are arranged in a plurality of numbers, the drilling teeth (5) are distributed around the coring bit (1), and a plurality of positioning grooves (2) are formed in the end face of the coring bit (1) corresponding to the drilling teeth (5).

3. The coal bed gas well large diameter wireline coring tool of claim 1, wherein: the cross-section of holding ring (3) is isosceles trapezoid structure, and the outer lane of holding ring (3) encircles and has seted up a plurality of depressed grooves (8).

4. The coal bed gas well large diameter wireline coring tool of claim 1, wherein: the side surface of the coring bit (1) is communicated with the positioning groove (2) and is provided with a yielding hole.

5. The coal bed gas well large diameter wireline coring tool of claim 3, wherein: the inner side surfaces of the plurality of concave grooves (8) are provided with through holes corresponding to the fastening bolts (4).

6. The coal bed gas well large diameter wireline coring tool of claim 1, wherein: the drilling teeth (5) are of a fan-shaped structure integrally, and the drilling teeth (5) are made of diamond materials.

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