CN115711093A - Self-impact coring drill bit, coring drilling tool and manufacturing method thereof - Google Patents

Abstract

The application discloses self-impact coring bit, coring drilling tool and manufacturing method thereof, coring bit includes: the drill bit matrix is provided with a first through hole at the center and a second through hole, and the second through hole and the first through hole are arranged in parallel; the second through hole comprises a first part and a second part which are connected with each other, and the size of the hole of the first part is larger than that of the hole of the second part; the drill bit matrix is provided with connecting threads; a stopper head connected to one end of the first portion; an elastic member disposed within the first portion; one end of the elastic piece is abutted against the blocking head; and a hammer punch including a hammer head portion and a hammer body portion connected to each other; the hammer head portion is disposed within the first portion and the hammer body portion is disposed within the second portion; the other end of the elastic piece is abutted against the hammer cap part; when the elastic member is in a natural extension state, one end of the hammer body part extends out of the hole of the second part. The utility model provides a supplementary detritus of impact load can be provided to coring bit self, and the structure is simplified more.

Description

Self-impact coring drill bit, coring drilling tool and manufacturing method thereof

Technical Field

The application belongs to the technical field of drilling equipment, and particularly relates to a self-impact coring drill bit, a coring drilling tool and a manufacturing method of the self-impact coring drill bit.

Background

At present, in geological exploration, drilling and oil drilling, impactors (commonly known as down-the-hole hammers, hydraulic hammers or pneumatic hammers) are generally used together with mud pumps, drill rods and drill bits as tools for impacting and rotating crushed rocks. The working mechanism is that a periodic impact load is added on the basis of the rotary cutting of the rock to assist the rock crushing. However, since the drill bit of the impactor cannot provide an impact load, the impactor needs to input energy from the outside when the impactor starts to work normally, the energy is generally provided by a connected mud pump or air compressor, and the structure of the impactor is complex, the size of the impactor is large, and debugging and maintenance are complex due to the connection of the mud pump or the air compressor.

In addition, the conventional impactors are used to assist in breaking rock, and in order to ensure the normal operation of the impactors at the bottom of a hole (well), the adjustment work is carried out on the surface of the earth. The normal work of the hydraulic impactor requires strict requirements on pump pressure and pump amount, when the hydraulic impactor is used, the matched mud pump type is larger than that of normal construction, when the full-hole wet leakage drilling construction is carried out, normal work is difficult to carry out due to low pump pressure, part of workpieces of the impactor are high in price, and the use cost is high.

Disclosure of Invention

The application aims to provide a self-impact coring bit, a coring drilling tool and a manufacturing method of the self-impact coring bit and the coring drilling tool, and aims to solve the technical problems that the coring bit of an impactor in the prior art cannot provide impact load, and the impactor is complex in structure, large in size, complex in debugging and maintenance and high in equipment cost due to the fact that an energy input device needs to be additionally connected.

To achieve the above object, in a first aspect, the present application provides a self-impact coring bit, comprising:

the drill bit matrix is provided with a first through hole in the center, and a second through hole which is parallel to the first through hole is also arranged on the drill bit matrix; the second through hole comprises a first part and a second part which are connected with each other, and the size of the hole of the first part is larger than that of the hole of the second part; the drill bit matrix is provided with connecting threads;

a stopper head connected to one end of the first portion;

a resilient member disposed within the first portion; one end of the elastic piece is abutted against the blocking head; and the number of the first and second groups,

the impact hammer comprises a hammer head part and a hammer body part which are connected with each other; the hammer cap portion is disposed within the first portion and the hammer body portion is disposed within the second portion;

the other end of the elastic piece is abutted against the hammer cap part; when the elastic piece is in a natural extension state, one end of the hammer body part extends out of the hole of the second part.

The hammer cap part is arranged on the elastic part, the hammer cap part is arranged on the hammer cap part, and two sides of the gasket are respectively abutted against the elastic part and the hammer cap part.

Furthermore, the second through holes are formed in the drill bit matrix in a plurality, and the second through holes are arranged around the first through holes.

Furthermore, one end of the first part is provided with an internal thread, and the blocking head is in threaded connection with the internal thread.

Further, an inner water tank is further arranged on the inner wall of the drill bit matrix and is arranged along the axial direction of the drill bit matrix, and the inner water tank is communicated with the first through hole.

Furthermore, a bottom water tank is further arranged on the end face of the drill bit matrix and communicated with the first through hole.

Further, an outer water tank is arranged on the outer wall of the drill bit matrix and communicated with the bottom water tank.

Furthermore, the bottom water tank is provided with a plurality of bottom water tanks which are arranged around the first through hole.

In a second aspect of the present application, there is also provided a core drill comprising a self-impacting core drill bit as described in any one of the above.

In a third aspect of the present application, there is provided a method for manufacturing a self-impact coring bit, comprising the steps of:

respectively drilling a first part of holes and a second part of holes on a drill bit matrix along the axial direction of the drill bit matrix; the size of the apertures of the first portion is greater than the size of the apertures of the second portion; the hole of the first part and the hole of the second part are communicated to form a second through hole; the second through hole and the first through hole of the drill bit matrix are arranged in parallel;

installing a hammer into the second through hole, wherein a hammer cap part of the hammer is positioned in the first part, and a hammer body part of the hammer is positioned in the second part;

an elastic piece is arranged in the second through hole, and one end of the elastic piece is abutted against the hammer cap part;

and connecting a blocking head at one end of the first part, so that the other end of the elastic piece is abutted against the blocking head.

Compared with the prior art, the method has the following technical effects:

the utility model provides a self-impact coring bit is through setting up elastic component and impact hammer in the drill bit matrix for the drill bit is creeping into the in-process, mutually support with the stratum of creeping into, self can provide the supplementary detritus of impact load, need not additionally to connect energy input equipment such as slush pump, air compressor machine, make the drilling tool structure that adopts self-impact coring bit of this application simplify more, reduce the whole volume of drilling tool, simplify the debugging and the maintenance operation of drilling tool simultaneously, and reduce equipment cost.

The manufacturing method of the self-impact coring bit is simple, and all components are easy to assemble, so that later-stage maintenance and replacement are facilitated.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments or the prior art description will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings may be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic cross-sectional view of a self-impacting coring bit according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of the bit matrix of FIG. 1;

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a bottom view of FIG. 2;

FIG. 5 is a schematic diagram illustrating the operation of a self-impacting core bit during a drilling process according to an embodiment of the present disclosure;

fig. 6 is a schematic diagram of the impact load generated by the operation of a single hammer of a self-impacting core bit according to an embodiment of the present disclosure.

Wherein, in the figures, the respective reference numerals:

1. the drill bit comprises a drill bit matrix, 2, a plugging head, 3, an elastic piece, 4, a punching hammer, 5, a gasket, 101, a first through hole, 102, a second through hole, 103, a connecting thread, 104, an inner water tank, 105, a bottom water tank, 106, an outer water tank, 401, a hammer cap portion, 402, a hammer body portion, 1021, a first portion, 1022, a second portion, 10211 and an internal thread.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first," "second," "third," "fourth," and "fifth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first", "second", "third", "fourth", "fifth" may explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1-6, a self-impact core drill bit, a core drill and a method for manufacturing the same according to an embodiment of the present invention will now be described.

The self-impact coring bit comprises a bit matrix 1, a plugging head 2, an elastic part 3 and a punch hammer 4. A first through hole 101 is formed in the center of the drill bit matrix 1, a second through hole 102 is further formed in the drill bit matrix 1, and the second through hole 102 and the first through hole 101 are arranged in parallel, namely the central axis of the second through hole 102 is parallel to the central axis of the first through hole 101; the second through hole 102 includes a first portion 1021 and a second portion 1022 connected to each other, the size of the hole of the first portion 1021 being larger than the size of the hole of the second portion 1022; the drill bit matrix 1 is provided with connecting threads 103, and the connecting threads 103 are used for connecting the rock core pipe. The blocking head 2 is connected to one end of the first part 1021, and is used for blocking one end of the second through hole 102 and preventing components arranged in the second through hole 102 from falling out of the end part of the second through hole 102; the elastic member 3 is disposed within the first portion 1021; one end of the elastic piece 3 is abutted against the plugging head 2; the impact hammer 4 includes a hammer cap portion 401 and a hammer body portion 402 connected to each other; the hammer cap portion 401 is disposed within the first portion 1021, and the hammer body portion 402 is disposed within the second portion 1022; the other end of the elastic member 3 abuts against the hammer cap 401; when the elastic member 3 is in the natural extension state, one end of the hammer 402 protrudes out of the hole of the second part 1022.

The specific meaning of the embodiment of the present application that the size of the hole of the first portion 1021 is larger than that of the hole of the second portion 1022 is: if the second through hole 102 is a circular hole, that is, both the first portion 1021 and the second portion 1022 are circular holes, the hole diameter of the first portion 1021 is larger than that of the second portion 1022; if at least one of the first portion 1021 and the second portion 1022 is a non-circular hole, such as a square hole, a hexagonal hole, etc., a projection of the hole of the second portion 1022 is within a projection of the hole of the first portion 1021. In general, the second through hole 102 of the embodiment of the present application needs to satisfy that the projection of the hole of the second portion 1022 is within the projection of the hole of the first portion 1021. The shapes of the first through hole 101 and the second through hole 102 in the embodiment of the present application are not limited, and the first through hole 101 and the second through hole 102 in the embodiment of the present application are illustrated by taking a circular hole as an example.

In the embodiment of the present application, an internal thread 10211 is provided at an upper end of the first portion 1021, an external thread matching with the internal thread 10211 is provided on the plug 2, and one end of the plug 2 is screwed into the hole of the first portion 1021.

The shape and the size of the hammer 4 of the embodiment of the present application are adapted to the shape and the size of the second through hole 102, the cap 401 of the hammer 4 is just clamped in the first portion 1021, the body 402 is just clamped in the second portion 1022, and the cap 401 cannot enter the second portion 1022, so that the hammer 4 can freely move upward in the second through hole 102, but the downward movement is limited.

In the embodiment of the present application, a spring may be used as the elastic member 3, and other members capable of elastically deforming may also be used.

Fig. 5 and 6 show schematic views of the working state of a self-impact coring bit according to an embodiment of the present application. Before the drilling operation starts, the elastic element 3 is in a natural straightening state, and the lower end of the impact hammer 4 extends out of the second through hole 102, as shown in fig. 4; after the drilling operation starts, when the bottom end surface of the drill bit matrix 1 is in the drilling rotation process and the bottom of the drill bit matrix meets stratum rock blocks with uneven surfaces, the protruded stratum rock blocks can enable the protruded impact hammers 4 to inwards extrude the elastic members 3 along the second through holes 102, the elastic members 3 are upwards compressed and enable the impact hammers 4 to be lifted at the same time, after the drill bit matrix 1 rotates for a certain angle, the extrusion of the stratum rock blocks on the lower end surface of the impact hammers 4 disappears, the impact hammers 4 can downwards move under the action of the elastic force of the elastic members 3, the height of the impact hammers 4 is rapidly changed to provide impact loads to assist rock breaking, and a schematic diagram of the impact loads generated when a single impact hammer 4 works is shown in fig. 6.

The self-impact coring bit provided by the embodiment of the application is characterized in that the elastic part 3 and the impact hammer 4 are arranged in the bit matrix 1, so that the bit is matched with a drilled stratum in the drilling process, the bit can provide impact load to assist rock crushing, and energy input equipment such as a slurry pump and an air compressor is not required to be additionally connected.

Further, the self-impact coring bit of the embodiment of the application further comprises a gasket 5, the gasket 5 is arranged between the elastic part 3 and the hammer cap portion 401, and two sides of the gasket 5 are respectively abutted against the elastic part 3 and the hammer cap portion 401. The resilient member 3 and the hammer cap 401 are spaced apart by a spacer 5 to mitigate impact wear between the contacting parts.

Further, the second through hole 102 of the embodiment of the present application is provided in plurality on the bit carcass 1, and the plurality of second through holes 102 are provided around the first through hole 101. The plurality of second through holes 102 may be uniformly and symmetrically disposed on the lower end surface of the drill bit matrix 1, in the embodiment of the present application, a total of 8 second through holes 102 are disposed, and each second through hole 102 is provided therein with the plugging head 2, the elastic member 3, and the punch 4 in the same manner as described above, and accordingly, 8 punch 4 are assembled. Thus, the drill bit has 8 punching hammers 4 in the circumferential direction, and in the drilling rotation process, the 8 punching hammers 4 in the 8 second through holes 102 generate impact load continuously, so that the drilling efficiency is improved.

Further, the connecting thread 103 may be disposed on an inner wall of the drill bit matrix 1, or may be disposed on an outer wall of the drill bit matrix 1, and the connecting thread 103 of the embodiment of the present application is disposed on the outer wall of the drill bit matrix 1, and in operation, the drill bit matrix 1 is connected to the core barrel through the connecting thread 103, and then is connected to a drill rod of a drilling machine.

Further, the inner wall of the drill bit matrix 1 of the embodiment of the present application is further provided with an inner water tank 104, the inner water tank 104 is arranged along the axial direction of the drill bit matrix 1, and the inner water tank 104 is communicated with the first through hole 101. When the drill bit drills, drilling fluid is supplied to the head of the drill bit through the inner water tank 104, so that the drill bit in work is cooled and protected.

Further, a bottom water tank 105 is further arranged on the lower end face of the drill bit matrix 1 of the embodiment of the application, and the bottom water tank 105 is communicated with the first through hole 101. The drilling fluid entering through the inner water tank 104 can flow around the drill bit quickly through the bottom water tank 105 to cool the drill bit more quickly. The bottom water tank 105 may be provided in plural, and the plural bottom water tanks 105 are provided around the first through hole 101 on the lower end face of the bit carcass 1. The bottom water tank 105 of the embodiment of the present application is provided with 8, and 8 bottom water tanks 105 and 8 second through holes 102 are arranged at intervals.

Further, still be equipped with outer basin 106 on the outer wall of drill bit matrix 1 of this application embodiment, outer basin 106 is linked together with end basin 105, can further accelerate the speed that drilling fluid flows around to the drill bit through setting up outer basin 106, cools down the drill bit fast.

In addition, the inner water tank 104 and the outer water tank 106 of the embodiment of the application can also effectively reduce or even avoid the drill jamming phenomenon caused by rock debris generated in the drilling process of the drill bit.

In a second aspect of the embodiments of the present application, there is also provided a core drill including the self-impact core drill described above. The coring drill tool of the embodiment of the application adopts the self-impact coring drill bit of the embodiment of the application, so that the structure of the coring drill tool is simplified and the whole volume of the drilling tool is reduced, and meanwhile, the debugging and maintenance operation of the drilling tool are simplified, and the equipment cost is reduced.

In a third aspect of the embodiments of the present application, there is also provided a method for manufacturing a self-impact coring bit, including the following steps:

(1) Drilling a hole of the first portion 1021 and a hole of the second portion 1022 respectively on the bit matrix 1 in the axial direction of the bit matrix 1; the size of the holes of the first part 1021 is larger than the size of the holes of the second part 1022; the hole of the first part 1021 is communicated with the hole of the second part 1022 to form a second through hole 102; the second through hole 102 is arranged in parallel with the first through hole 101 of the bit matrix 1;

(2) The hammer 4 is loaded into the second through hole 102, the hammer cap part 401 of the hammer 4 is positioned in the first part 1021, and the hammer body 402 of the hammer 4 is positioned in the second part 1022;

(3) The elastic member 3 is fitted into the second through hole 102, and one end of the elastic member 3 abuts against the hammer cap portion 401;

(4) The plug 2 is connected to one end of the first portion 1021, and the other end of the elastic member 3 is abutted against the plug 2.

In addition, in the manufacturing process, after the hammer 4 is installed, the gasket 5 can be installed, so that the hammer cap part 401 of the hammer 4 is abutted against the lower side of the gasket 5; then the elastic member 3 is installed so that the upper side of the gasket 5 abuts against the lower side of the elastic member 3; finally, the plug 2 is screwed into the hole of the first part 1021 such that the upper end of the elastic member 3 abuts against the lower side of the plug 2.

It is also possible to uniformly cut off 8 bottom water grooves 105 in a circumferential ring shape on the lower end surface of the bit matrix 1, wherein one bottom water groove 105 cuts off one inner water groove 104 and one outer water groove 106 in the axial direction of the bit matrix 1 on the inside and the outside, respectively.

When the drill bit matrix 1 is used, the drill bit matrix 1 is connected with the upper rock core tube and the drill rod through the connecting threads 103 on the outer wall of the drill bit matrix, and the drill bit matrix is assembled on a drilling machine.

The manufacturing method of the self-impact coring bit is simple, and all components are easy to assemble, so that later maintenance and replacement are facilitated.

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A self-impacting coring bit, comprising:

the drill bit matrix is provided with a first through hole in the center and a second through hole in parallel with the first through hole; the second through hole comprises a first part and a second part which are connected with each other, and the size of the hole of the first part is larger than that of the hole of the second part; the drill bit matrix is provided with connecting threads;

a stopper head connected to one end of the first portion;

a resilient member disposed within the first portion; one end of the elastic piece is abutted against the blocking head; and (c) a second step of,

a hammer ram comprising a ram portion and a ram portion connected to each other; the hammer cap portion is disposed within the first portion and the hammer body portion is disposed within the second portion;

the other end of the elastic piece is abutted against the hammer cap part; when the elastic member is in a natural extension state, one end of the hammer body extends out of the hole of the second part.

2. The self-impact coring bit of claim 1, further comprising a spacer disposed between the resilient member and the hammer cap portion, wherein two sides of the spacer abut the resilient member and the hammer cap portion, respectively.

3. The self-percussive coring bit of claim 1, wherein the second through-hole is provided in plurality in the bit matrix, the plurality of second through-holes being disposed around the first through-hole.

4. A self-impacting coring bit according to claim 1, wherein the first portion has an internal thread at one end thereof, and wherein the plug head is threadably connected to the internal thread.

5. The self-impact coring bit of any one of claims 1-4, wherein the inner wall of the bit body is further provided with an inner water channel, the inner water channel is arranged along the axial direction of the bit body, and the inner water channel is communicated with the first through hole.

6. The self-impact coring bit of claim 5, wherein a bottom water trough is further provided on the end surface of the bit matrix, the bottom water trough being in communication with the first through hole.

7. The self-impact coring bit of claim 6, wherein an outer water channel is further provided on an outer wall of the bit matrix, the outer water channel being in communication with the bottom water channel.

8. A self-impact coring bit as set forth in claim 7 wherein said bottom water trough is provided in plurality, a plurality of said bottom water troughs being disposed around said first through hole.

9. A core drill, characterized in that it comprises a self-percussion core drill bit according to any one of claims 1 to 8.

10. A method of making a self-piercing coring bit as set forth in any of claims 1-8, comprising the steps of:

respectively drilling a first part of holes and a second part of holes on a drill bit matrix along the axial direction of the drill bit matrix; the size of the pores of the first portion is greater than the size of the pores of the second portion; the hole of the first part and the hole of the second part are communicated to form a second through hole; the second through hole and the first through hole of the drill bit matrix are arranged in parallel;

installing a punch hammer into the second through hole, wherein a hammer cap part of the punch hammer is positioned in the first part, and a hammer body part of the punch hammer is positioned in the second part;

an elastic piece is arranged in the second through hole, and one end of the elastic piece is abutted against the hammer cap part;

and connecting a blocking head at one end of the first part, so that the other end of the elastic part is abutted against the blocking head.

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