CN219327509U - Self-impact coring bit and coring drilling tool - Google Patents

Abstract

The application discloses from impact coring bit and drilling tool that cores, this coring bit includes: the drill bit matrix is provided with a first through hole at the center, a second through hole is also arranged on the drill bit matrix, 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 first part is larger than that of the second part; a blocking 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 with the plugging head; the impact hammer comprises a hammer cap part and a hammer body part which are connected with each other; the hammer cap part is arranged in the first part, and the hammer body part is arranged in the second part; the other end of the elastic piece is abutted with 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 self-impact coring bit can provide impact load for assisting rock crushing, and the self-impact coring bit is simpler in structure and lower in equipment cost.

Description

Self-impact coring bit and coring drilling tool

Technical Field

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

Background

Currently, in geological exploration, drilling and petroleum drilling, a impactor (commonly known as a down-the-hole hammer, a hydraulic hammer or a pneumatic hammer) is generally used as a tool for impacting and rotating crushed rock by matching with a slurry pump, a drill rod and a drill bit. The working mechanism is to accumulate a periodic impact load to assist rock crushing on the basis of rotary rock cutting. However, since the impactor bit itself cannot provide impact load, the impactor needs to input energy from the outside when starting to work normally, and is generally provided by a connected slurry pump or air compressor, which results in complex structure, large volume and complex debugging and maintenance.

In addition, the conventional impactor assists the rock breaking tool, and in order to ensure that the rock breaking tool works normally at the bottom of a hole (well), the relevant debugging work is required to be carried out on the ground surface. The normal work of the hydraulic impactor needs to have strict requirements on the pump pressure and the pump quantity, when the hydraulic impactor is used, the matched type of the slurry pump is larger than that of normal construction, when the hydraulic impactor is used for full-hole wet leakage drilling construction, the hydraulic impactor is difficult to work normally due to low pump pressure, and part of workpieces of the impactor are high in price and high in use cost.

Disclosure of Invention

The utility model provides a from impact coring bit and drilling tool to the coring bit of the impacter in solving prior art itself can not provide impact load, needs the impacter structure complicacy that extra connection energy input device led to, the volume is great, debugging and maintenance are more complicated and the higher technical problem of equipment cost.

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

the drill bit matrix is provided with a first through hole at the center, and is also provided with 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 first part is larger than that of the second part;

a blocking 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 with the plugging head; the method comprises the steps of,

the impact hammer comprises a hammer cap part and a hammer body part which are connected with each other; the hammer cap portion is arranged in the first part, and the hammer body portion is arranged in the second part;

the other end of the elastic piece is abutted with 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.

Further, the novel hammer is characterized by further comprising a gasket, wherein the gasket is arranged between the elastic piece and the hammer cap, and two sides of the gasket are respectively abutted to the elastic piece and the hammer cap.

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

Further, an internal thread is arranged at one end of the first part, and the blocking head is in threaded connection with the internal thread.

Further, the drill bit matrix is provided with connecting threads, and the connecting threads are used for connecting the core barrel.

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

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

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

Further, the bottom water tank is provided with a plurality of bottom water tanks, and the plurality of bottom water tanks are arranged around the first through holes.

In a second aspect of the present application, there is also provided a coring bit including a self-percussive coring bit as set forth in any one of the preceding claims.

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

the utility model provides a from impact coring bit is through setting up elastic component and impact hammer in the drill bit matrix for the drill bit is in the drilling process, mutually supporting with the stratum that drills into, and self can provide impact load auxiliary rock crushing, need not energy input equipment such as extra connection slush pump, air compressor machine, makes the drilling tool structure of adopting the self impact coring bit of this application simplify more, reduce drilling tool whole volume, simplify the debugging and the maintenance operation of drilling tool simultaneously, and reduce equipment cost.

Drawings

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

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

FIG. 2 is a schematic 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 of a drilling process of a self-percussive coring bit according to an embodiment of the present application;

fig. 6 is a schematic diagram of a self-percussive coring bit according to an embodiment of the present application, in which a single ram is operated to generate a percussive load.

Wherein, each reference sign in the figure:

1. bit matrix, 2, plug, 3, elastic piece, 4, punch hammer, 5, gasket, 101, first through hole, 102, second through hole, 103, connecting screw thread, 104, inner water tank, 105, bottom water tank, 106, outer water tank, 401, hammer cap part, 402, hammer body part, 1021, first part, 1022, second part, 10211 and internal screw thread.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, 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 for purposes of illustration only and are not intended to limit the present application.

It will be understood that when an element is referred to as being "mounted" 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 is to be understood that the terms "length," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting 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 a relative importance or implying a number of technical features being indicated. Thus, a feature defining "first", "second", "third", "fourth", "fifth" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Referring to fig. 1-6, a self-percussive coring bit and a coring tool according to embodiments of the present application will now be described.

A self-percussive coring bit of an embodiment of the present application includes a bit body 1, a bulkhead 2, an elastic member 3, and a hammer ram 4. The center of the drill bit matrix 1 is provided with a first through hole 101, the drill bit matrix 1 is also provided with a second through hole 102, 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 first portion 1021 being larger than the size of the second portion 1022; the blocking head 2 is connected to one end of the first portion 1021, and is used for blocking one end of the second through hole 102, so as to prevent the component arranged in the second through hole 102 from falling out of the end of the second through hole 102; the elastic member 3 is provided in the first portion 1021; one end of the elastic piece 3 is abutted with the plugging head 2; the impact hammer 4 comprises a hammer cap part 401 and a hammer body part 402 which are connected with each other; the hammer cap 401 is disposed within the first portion 1021 and the hammer body 402 is disposed within the second portion 1022; the other end of the elastic piece 3 is abutted with the hammer cap part 401; when the elastic member 3 is in a natural extension state, one end of the hammer body 402 protrudes out of the hole of the second part 1022.

The specific meaning of "the size of the hole of the first portion 1021 is larger than the size of the hole of the second portion 1022" in the embodiment of the present application is: if the second through hole 102 is a circular hole, that is, the first portion 1021 and the second portion 1022 are both circular holes, the hole diameter of the first member 1021 is larger than the hole diameter of the second portion 1022; if at least one of the first portion 1021 and the second portion 1022 is a non-circular aperture, such as a square aperture, a hexagonal aperture, etc., then the projection of the aperture of the second portion 1022 is within the projection of the aperture of the first portion 1021. Generally, the second through hole 102 of the present embodiment needs to satisfy that the projection of the hole of the second portion 1022 thereof 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 described by taking circular holes as examples.

The plugging head 2 of the embodiment of the present application may be plugged at one end of the hole of the first portion 1021 in a welding or bonding manner, in the embodiment of the present application, an internal thread 10211 is disposed at the upper end of the first portion 1021, an external thread matched with the internal thread 10211 is disposed on the plugging head 2, and one end of the plugging head 2 is screwed into the hole of the first portion 1021.

The shape and size of the impact hammer 4 are matched with the shape and size of the second through hole 102, the hammer cap 401 of the impact hammer 4 is just clamped in the first part 1021, the hammer body 402 is just clamped in the second part 1022, and the hammer cap 401 cannot enter the second part 1022, so that the impact hammer 4 can freely move upwards in the second through hole 102, but downward movement is limited.

The embodiment of the present application may use a spring as the elastic member 3, or may use other members capable of being elastically deformed.

The working state schematic diagrams of the self-impact coring bit according to the embodiment of the present application are shown in fig. 5 and 6. Before the drilling work starts, the elastic piece 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 work starts, when the bottom of the lower end face of the drill bit matrix 1 meets stratum rock blocks with uneven surfaces in the drilling rotation process, the protruding stratum rock blocks can press the protruding impact hammer 4 inwards to extrude the elastic piece 3 along the second through hole 102, the elastic piece 3 is compressed upwards, meanwhile, the impact hammer 4 is lifted in height, after the drill bit matrix 1 rotates for a certain angle, the extrusion of the stratum rock blocks received by the lower end face of the impact hammer 4 disappears, the impact hammer 4 moves downwards under the elastic action of the elastic piece 3, the height of the impact hammer 4 changes rapidly, impact load is provided to assist broken rock, and a schematic diagram of impact load generated when the single impact hammer 4 works is shown in fig. 6.

According to the self-impact coring bit, the elastic piece 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, impact load auxiliary rock crushing can be provided by the self, and energy input equipment such as a slurry pump and an air compressor are not required to be additionally connected.

Further, the self-impact coring bit according to the embodiment of the present application further includes a spacer 5, where the spacer 5 is disposed between the elastic member 3 and the hammer cap 401, and two sides of the spacer 5 are respectively abutted against the elastic member 3 and the hammer cap 401. The elastic member 3 and the hammer cap 401 are spaced apart by the spacer 5 to alleviate impact wear between the contact members.

Further, a plurality of second through holes 102 are provided on the bit body 1, and a 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 arranged on the lower end surface of the drill bit matrix 1, in this embodiment, 8 second through holes 102 are arranged in total, and each second through hole 102 is provided with a blocking head 2, an elastic member 3 and a punch 4 in the same manner as described above, and accordingly, 8 punches 4 are assembled. In this way, 8 impact hammers 4 are circumferentially arranged on the drill bit, and in the drilling rotation process, 8 impact hammers 4 in 8 second through holes 102 are continuously circulated to generate impact load, so that the drilling efficiency is improved.

Further, the drill bit matrix 1 in the embodiment of the present application is provided with a connecting thread 103, and the connecting thread 103 is used for connecting the core barrel. The connecting thread 103 can be arranged on the inner wall of the drill bit matrix 1 and also can be arranged on the outer wall of the drill bit matrix 1, and the connecting thread 103 in the embodiment of the application is arranged on the outer wall of the drill bit matrix 1, and when in operation, the drill bit matrix 1 is connected with a core barrel through the connecting thread 103, and then is connected to a drill rod of a drilling machine.

Further, an inner water groove 104 is further formed in the inner wall of the drill bit matrix 1, the inner water groove 104 is arranged along the axial direction of the drill bit matrix 1, and the inner water groove 104 is communicated with the first through hole 101. When the drill bit performs drilling operation, drilling fluid is supplied to the drill bit head through the inner water tank 104 so as to cool and protect the drill bit in operation.

Further, a bottom water groove 105 is further provided on the lower end surface of the drill bit matrix 1 in the embodiment of the present application, and the bottom water groove 105 is communicated with the first through hole 101. Drilling fluid entering through the inner water tank 104 can flow around the drill bit rapidly through the bottom water tank 105 so as to cool the drill bit more rapidly. The plurality of the ground water grooves 105 may be provided, and the plurality of ground water grooves 105 may be provided around the first through hole 101 on the lower end surface of the bit body 1. The bottom water tank 105 of the embodiment of the application is provided with 8, 8 bottom water tanks 105 and 8 second through holes 102 at intervals.

Further, the outer wall of the drill bit matrix 1 is further provided with the outer water tank 106, the outer water tank 106 is communicated with the bottom water tank 105, and the speed of drilling fluid flowing to the periphery of the drill bit can be further accelerated by arranging the outer water tank 106, so that the drill bit is cooled rapidly.

In addition, the inner water tank 104 and the outer water tank 106 in the embodiment of the application can effectively reduce or even avoid the jamming phenomenon caused by rock fragments 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 coring bit including the self-percussive coring bit described above. The self-impact coring bit of the embodiment of the application is adopted in the coring drilling tool, so that the structure is simplified, the whole volume of the drilling tool is reduced, meanwhile, the debugging and maintenance operations of the drilling tool are simplified, and the equipment cost is reduced.

The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not thereby to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (9)

1. A self-percussive coring bit, comprising:

the drill bit matrix is provided with a first through hole at the center, and is also provided with 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 first part is larger than that of the second part;

a blocking 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 with the plugging head; the method comprises the steps of,

the impact hammer comprises a hammer cap part and a hammer body part which are connected with each other; the hammer cap portion is arranged in the first part, and the hammer body portion is arranged in the second part;

the other end of the elastic piece is abutted with 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.

2. The self-percussive coring bit of claim 1 further comprising a spacer disposed between the resilient member and the hammer cap, wherein two sides of the spacer are respectively in abutment with the resilient member and the hammer cap.

3. A self-percussive coring bit as set forth in claim 1 wherein said second through-holes are provided in plurality on said bit body, a plurality of said second through-holes being disposed around said first through-holes.

4. A self-percussive coring bit as recited in claim 1, wherein an end of the first portion is provided with internal threads, and wherein the plug is threadably coupled to the internal threads.

5. A self-percussive coring bit as in any one of claims 1-4 wherein an inner water groove is further provided on an inner wall of said bit body, said inner water groove being disposed axially of said bit body, said inner water groove being in communication with said first through hole.

6. The self-percussive coring bit of claim 5, wherein a bottom water groove is further provided on the end face of the bit body, the bottom water groove being in communication with the first through hole.

7. The self-percussive coring bit of claim 6 wherein an outer wall of the bit body is further provided with an outer water trough, the outer water trough being in communication with the bottom water trough.

8. The self-percussive coring bit of claim 6, wherein a plurality of said bottom water grooves are provided, a plurality of said bottom water grooves being disposed around said first throughbore.

9. A coring drilling tool comprising a self-percussive coring bit as claimed in any one of claims 1 to 8.

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