CN214886875U

CN214886875U - Be used for shale gas to open and adopt combination formula PDC drill bit

Info

Publication number: CN214886875U
Application number: CN202121259180.7U
Authority: CN
Inventors: 周喜勇; 胡军; 邹大双
Original assignee: Wuhan Eastar Tool Co ltd
Current assignee: Wuhan Eastar Tool Co ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2021-11-26
Anticipated expiration: 2031-06-07

Abstract

The utility model discloses a be used for shale gas to open and adopt combination formula PDC drill bit, including the drill bit base member, upper portion fixedly connected with bearing plate in the drill bit base member, bearing plate top middle part fixedly connected with hydraulic stem, the hydraulic stem top all rotates and is connected with the connecting rod, the connecting rod top all rotates through first hinge and is connected with mud cleaning plate, drill bit base member bottom fixedly connected with collar, the cover is equipped with the adapter sleeve around the collar outside. The utility model discloses in, through extension hydraulic stem, drive the connecting rod and promote clear mud board and open to all around, make the detritus pushed away the drill bit periphery, reach the purpose of clearance drill bit mud bag, through snare with installing on the adapter sleeve top, be provided with the draw-in groove in the adapter sleeve, prevent effectively that the drill bit from taking place to rotate with the adapter sleeve in the course of the work, the adapter sleeve has two halves and passes through bolted connection, reaches the purpose of convenient installation when changing the drill bit, is worth wideling popularize.

Description

Be used for shale gas to open and adopt combination formula PDC drill bit

Technical Field

The utility model relates to a PDC drill bit technical field especially relates to a be used for shale gas exploitation to adopt combination formula PDC drill bit.

Background

PDC bits have the hardness and wear resistance of diamond, and the strength and impact toughness of cemented carbide, are excellent cutting tools and wear-resistant tool materials, and have been widely used in many fields such as metal and non-metal cutting tools, wood working tools, oil and gas bits, and the like.

PDC drill bit is at the course of the work, because the shale hydration dispersion in the stratum adsorbs and causes the drill bit mud package on the drill bit surface, can make the drill bit footage obviously slow down this moment, and the elapsed time increases, reduces drill bit work efficiency, because the drill bit contacts hard rock block for a long time, causes the drill bit wearing and tearing easily, consequently needs to change the drill bit, and traditional drill bit replacement process is loaded down with trivial details, and is inefficient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a combined PDC drill bit for shale gas exploitation.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a be used for shale gas to open and adopt combination formula PDC drill bit, includes the drill bit base member, all be provided with long wing around the drill bit base member top, drill bit base member top both sides evenly distributed has short wing, middle part fixedly connected with bearing board in the drill bit base member, bearing board top middle part fixedly connected with hydraulic stem, the hydraulic stem top is all rotated and is connected with the connecting rod, the connecting rod top is all rotated through first hinge and is connected with mud cleaning plate, drill bit base member bottom fixedly connected with installation circle, installation circle inner wall evenly distributed has the fixture block, the installation snare is established inside the adapter sleeve top, be provided with the packing ring between adapter sleeve and the installation circle, adapter sleeve both sides evenly distributed has the recess, the inside through connection of recess has the bolt.

As a further description of the above technical solution:

and cutting teeth are uniformly distributed on the surfaces of the long blade and the short blade.

As a further description of the above technical solution:

a chip groove is arranged between the blades.

As a further description of the above technical solution:

the bottom ends of the mud cleaning plates are rotatably connected with the bearing plate through second hinges.

As a further description of the above technical solution:

six connecting rods and six mud cleaning plates are arranged.

As a further description of the above technical solution:

clamping grooves are uniformly distributed in the top end of the connecting sleeve and are in sliding connection with the clamping blocks.

As a further description of the above technical solution:

the connecting sleeve is divided into two halves and is connected through a bolt.

As a further description of the above technical solution:

the bottom end of the connecting sleeve is provided with threads.

The utility model discloses following beneficial effect has:

1. the utility model discloses in, at first when the drill bit takes place the mud bag, through the hydraulic stem extension, drive the connecting rod and promote clear mud board and open, make the detritus that adheres to on the drill bit surface arrange the drill bit periphery, reach the purpose of clearance drill bit mud bag, mining efficiency with higher speed.

2. The utility model discloses in, through being provided with the installation circle in drill bit base member bottom, will install the snare and overlap on the adapter sleeve top, be provided with the draw-in groove in the adapter sleeve, prevent effectively that the drill bit from taking place to rotate with the adapter sleeve in the course of the work, the adapter sleeve has two halves and through bolted connection, the purpose of convenient installation when reaching the change drill bit, is worth wideling popularize.

Drawings

Fig. 1 is a front view of a combined PDC drill bit for shale gas exploitation according to the present invention;

fig. 2 is a side view of a combined PDC drill bit for shale gas production according to the present invention;

fig. 3 is a top view of a combined PDC drill bit for shale gas exploitation according to the present invention;

fig. 4 is a schematic diagram of a mud cleaning structure of the combined PDC drill bit for shale gas exploitation according to the present invention;

fig. 5 is the utility model provides a mounting ring structural schematic for shale gas exploitation combination formula PDC drill bit.

Illustration of the drawings:

1. a thread; 2. a groove; 3. a bolt; 4. a drill bit substrate; 5. a second hinge; 6. cutting teeth; 7. cleaning a mud plate; 8. a chip groove; 9. a support plate; 10. a gasket; 11. connecting sleeves; 12. a long blade; 13. short blade; 14. a connecting rod; 15. a hydraulic lever; 16. a first hinge; 17. installing a ring; 18. and (7) clamping blocks.

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.

Referring to fig. 1-5, the present invention provides an embodiment: a combined PDC drill bit for shale gas exploitation comprises a drill bit base body 4, long blades 12 are arranged on the front portion and the rear portion of the top end of the drill bit base body 4, short blades 13 are evenly distributed on the two sides of the top end of the drill bit base body 4, the long blades 12 are matched with the short blades 13 to enable cutting to be thorough, stress is even, a bearing plate 9 is fixedly connected to the middle portion in the drill bit base body 4, the bearing plate 9 is used for supporting a hydraulic rod 15, a hydraulic rod 15 is fixedly connected to the middle portion of the top end of the bearing plate 9, the volume of the hydraulic rod 15 is determined according to the size of a required drill bit, a connecting rod 14 is rotatably connected to the top end of the hydraulic rod 15, a mud cleaning plate 7 is rotatably connected to the top end of the connecting rod 14 through a first hinge 16, the hydraulic rod 15 is lifted to enable the connecting rod 14 connected with the mud cleaning plate 7 to disperse towards the periphery, rock debris gathered on the surface of the mud cleaning plate 7 is pushed to leave, the purpose of cleaning a mud pocket of the drill bit is achieved, a mounting ring 17 is fixedly connected to the bottom end of the drill bit base body 4, the mounting ring 17 is larger than the outer diameter of the drill bit base body 4, fixture blocks 18 are uniformly distributed on the inner wall of the mounting ring 17, the mounting ring 17 is sleeved inside the top end of the connecting sleeve 11, a gasket 10 is arranged between the connecting sleeve 11 and the mounting ring 17, grooves 2 are uniformly distributed on two sides of the connecting sleeve 11, bolts 3 are connected inside the grooves 2 in a penetrating mode, the bolts 3 are connected through the grooves 2, the protrusions of the connecting sleeve 11 can be reduced, scratches are prevented, and other objects are damaged.

The cutting teeth 6 are uniformly distributed on the surfaces of the long blades 12 and the short blades 13, the cutting teeth 6 are used for cutting shale to accelerate the penetration of a drill bit, a chip discharge groove 8 is formed between the blades, the drill bit penetrates into the shale, drilled rock debris is discharged from the chip discharge groove 8, the bottom ends of the mud cleaning plates 7 are rotatably connected with the bearing plate 9 through a second hinge 5, the mud cleaning plates 7 can rotate for a certain angle around the bearing plate 9, six connecting rods 14 and the mud cleaning plates 7 are provided, one connecting rod 14 is connected with one mud cleaning plate 7, the six connecting rods 14 and the mud cleaning plates 7 are distributed in a circular ring shape, the mud cleaning plate 7 is pushed to rotate by the movement of the connecting rod 14, clamping grooves are uniformly distributed in the top end of the connecting sleeve 11 and are in sliding connection with the clamping blocks 18, the clamping blocks 18 are inserted into the clamping grooves, the relative rotation between the drill bit base body 4 and the connecting sleeve 11 can be effectively prevented, the connection is more stable, the connecting sleeve 11 is divided into two halves and is connected through bolts 3, during installation, the two halves of the connecting sleeve 11 are clamped together, the top end of the connecting sleeve 11 is clamped with the main mounting ring 17, installation can be completed by screwing the bolt 3, the connecting structure is convenient and fast, connection is stable, the drill bit can be conveniently replaced, the bottom end of the connecting sleeve 11 is provided with the thread 1, and the connecting sleeve 11 can be installed on a proper connecting piece through the thread 1.

The working principle is as follows: in the use of combination formula PDC drill bit, when the balling bit takes place, through extension hydraulic stem 15, drive connecting rod 14 and promote clear mud board 7 and open all around, make the detritus and the balling attached to the drill bit surface push away the drill bit periphery, reach the purpose of clearance drill bit balling, shrink hydraulic stem 15, then clear mud board 7 can be withdrawed, continue to exploit, the efficiency of exploitation accelerates, through being provided with collar 17 in 4 bottoms of drill bit base member, overlap collar 17 on adapter sleeve 11 tops, be provided with the draw-in groove in adapter sleeve 11, prevent effectively that the drill bit from taking place to rotate with adapter sleeve 11 in the course of the work, adapter sleeve 11 has two halves and passes through bolt 3 and connect, reach the purpose of convenient installation when changing the drill bit, be worth wideling popularize.

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

1. A be used for shale gas exploitation combination formula PDC drill bit, includes drill bit base member (4), its characterized in that: the drill bit is characterized in that long blades (12) are arranged at the front and the back of the top end of the drill bit base body (4), short blades (13) are uniformly distributed on two sides of the top end of the drill bit base body (4), a bearing plate (9) is fixedly connected to the middle inside the drill bit base body (4), a hydraulic rod (15) is fixedly connected to the middle of the top end of the bearing plate (9), a connecting rod (14) is rotatably connected to the top end of the hydraulic rod (15), a mud cleaning plate (7) is rotatably connected to the top end of the connecting rod (14) through a first hinge (16), a mounting ring (17) is fixedly connected to the bottom end of the drill bit base body (4), clamping blocks (18) are uniformly distributed on the inner wall of the mounting ring (17), the mounting ring (17) is sleeved inside the top end of the connecting sleeve (11), a gasket (10) is arranged between the connecting sleeve (11) and the mounting ring (17), and grooves (2) are uniformly distributed on two sides of the connecting sleeve (11), the groove (2) is internally connected with a bolt (3) in a penetrating way.

2. The combined PDC drill bit for shale gas production according to claim 1, wherein: cutting teeth (6) are uniformly distributed on the surfaces of the long blade (12) and the short blade (13).

3. The combined PDC drill bit for shale gas production according to claim 1, wherein: and chip grooves (8) are formed between the blades.

4. The combined PDC drill bit for shale gas production according to claim 1, wherein: the bottom ends of the mud cleaning plates (7) are rotatably connected with the bearing plate (9) through second hinges (5).

5. The combined PDC drill bit for shale gas production according to claim 1, wherein: six connecting rods (14) and six mud removing plates (7) are arranged.

6. The combined PDC drill bit for shale gas production according to claim 1, wherein: clamping grooves are uniformly distributed in the top end of the connecting sleeve (11) and are in sliding connection with the clamping blocks (18).

7. The combined PDC drill bit for shale gas production according to claim 1, wherein: the connecting sleeve (11) is divided into two parts and is connected through a bolt (3).

8. The combined PDC drill bit for shale gas production according to claim 1, wherein: the bottom end of the connecting sleeve (11) is provided with a thread (1).