CN220101191U - Front and rear tooth blade type coring bit - Google Patents

Abstract

The utility model relates to a front and rear tooth blade type coring bit, which belongs to the technical field of bits and comprises a bit body, wherein the bit body is arranged on a power device, blades are arranged at one end of the bit body, each blade comprises a first cutting tooth and a second cutting tooth which are arranged in a front-rear staggered manner, and grooves for assisting cutting are formed in the blades; according to the utility model, the first cutting teeth and the second cutting teeth which are arranged in a rear staggered way can be used for increasing the distance between the cutting surfaces of the teeth, reducing the influence on the compaction effect of adjacent teeth in the cutting process of the cutting teeth in the stratum, thereby achieving the purpose of high-efficiency cutting, improving the core acquisition speed of the coring bit, avoiding the mutual influence caused by the too small distance between the adjacent teeth in the cutting process of the teeth, and avoiding the situation that the length of the first cutting teeth does not exceed the end surface of the blade to cause the leakage of the first cutting teeth and the cutting cannot be performed because the grooves are used for assisting the cutting of the first cutting teeth which are positioned at the front end of the blade and are provided with rear teeth.

Description

Front and rear tooth blade type coring bit

Technical Field

The utility model relates to the technical field of drill bits, in particular to a front and rear tooth blade type core drill bit.

Background

At present, oil and gas exploration and development are changed from conventional oil and gas reservoirs to low-permeability and unconventional oil and gas reservoirs, and the oil and gas exploration and development are advanced from shallow layers to deep layers and ultra-deep layers, so that the drilling difficulty is increased. As the drilling depth increases, the finer the constituent particles of the formation rock, the greater its plasticity. When the drill meets deep plastic stratum, the problems that cutting teeth are difficult to eat and the mechanical drilling speed is difficult to improve can occur. Taking a shale oil well in a victory oil field as an example, the mechanical drilling speed of a traditional coring bit is generally lower than 1m/h, and the length of the coring bit is unequal from 300 meters to 1000 meters due to the design of a large section of coring section, so that the coring bit faces the dilemma of 1-2 months of operation duration.

For many current drill designs, the coring bit adopts a conventional tooth distribution method, and has a certain improvement effect on the mechanical drilling speed by matching with axe-shaped teeth, sharp teeth and the like, but is not obvious.

In order to solve the above-mentioned problems, a drill bit has been commercially available which adopts a concave cutting tooth as a crown cutting tooth of a coring bit, but the drill bit does not actually improve the interaction between the cutting teeth, but only improves the cutting of a single tooth.

Disclosure of Invention

The embodiment of the utility model provides a front and rear tooth blade type coring bit, which aims to solve the problem that adjacent cutting teeth in the bit can be mutually influenced in the related art.

The embodiment of the utility model provides a front and rear tooth blade type coring bit, which comprises

The drill bit body is arranged on the power device.

The blade, the blade sets up in the one end of drill bit body, the blade includes first cutting tooth and the second cutting tooth of the crisscross arrangement in front and back.

And the blade is also provided with a groove for assisting cutting.

In some embodiments, the blades are circumferentially distributed on the end face of the bit body.

In some embodiments, the first cutting teeth and the second cutting teeth are all a plurality of, and the first cutting teeth and the second cutting teeth are arranged in a staggered manner.

In some embodiments, the first cutting tooth is a back cutting tooth and the second cutting tooth is a front cutting tooth.

The grooves are used for assisting the first cutting teeth in cutting some embodiments, water holes are formed in the drill bit body, and the water holes are formed between every two blades.

In some embodiments, the groove is formed in the front end of the blade.

In some embodiments, the drill bit body is further provided with a water hole, and the water hole is arranged between every two blades.

In some embodiments, the water holes may be used to connect nozzles.

In some embodiments, the water holes may also be through holes.

In some embodiments, the first and second cutting teeth may be non-planar or planar.

In some embodiments, the first cutting tooth and the second cutting tooth are each diamond compacts.

The embodiment of the utility model provides a front and rear tooth blade type coring bit, which increases the interval between tooth cutting surfaces by virtue of first cutting teeth and second cutting teeth which are arranged in a front-rear staggered way, reduces the influence on the compaction effect of adjacent teeth in the cutting process of the cutting teeth in a stratum, thereby achieving the purpose of high-efficiency cutting, improving the core acquisition speed of the coring bit, and avoiding the mutual influence caused by the too small interval between the adjacent teeth in the cutting process of the teeth.

The groove is used for being located the blade front end and for the supplementary cutting of the first cutting tooth of rear-mounted tooth, avoids first cutting tooth's length not exceeding the terminal surface of blade and makes it unable to spill, leads to unable cutting.

Drawings

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

FIG. 1 is a schematic top view of an embodiment of the present utility model;

fig. 2 is a schematic diagram of a front view structure according to an embodiment of the present utility model.

101. A bit body; 102. a blade; 103. a water hole; 104. a first cutting tooth; 105. a second cutting tooth; 106. a groove.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The embodiment of the utility model provides a front and rear tooth blade type coring bit which can solve the problem that adjacent cutting teeth in the bit can be mutually influenced.

Referring to FIGS. 1-2, embodiments of the present utility model provide a front and rear tooth blade coring bit, comprising

Bit body 101, blades 102, and flutes 106.

Wherein, the drill bit body 101 is installed on a power device, so that the drill bit body 101 drives the blades 102 to rotate for core drilling and coring.

Wherein blades 102 are disposed at one end of bit body 101.

The blade 102 comprises first cutting teeth 104 and second cutting teeth 105 which are arranged in a staggered mode in the front-back mode, compaction interference generated when adjacent cutting teeth eat a stratum is reduced through the first cutting teeth 104 and the second cutting teeth 105 which are arranged in the staggered mode in the front-back mode, the purpose of efficient cutting is achieved, the core acquisition speed of a core bit is improved, the first cutting teeth 104 are rear-mounted teeth, and the second cutting teeth 105 are front-mounted teeth.

The groove 106 is used for assisting cutting of the first cutting tooth 104, which is a rear tooth and is located at the front end of the blade 102, so as to avoid that the length of the first cutting tooth 104 does not exceed the end face of the blade 102, so that the first cutting tooth cannot leak out, and cutting cannot be performed.

In this embodiment, 3-10 blades 102 may be circumferentially distributed on the end face of the drill bit body 101, as shown in fig. 1, five blades 102 are installed on the drill bit body 101 in this embodiment, and equally spaced circumferentially distributed on the end face of the drill bit body 101, so that the drill bit drives the blades 102 to cut at multiple angles, and the cutting range is uniform.

In this embodiment, the groove 106 is formed at the front end of the blade 102, so that the first cutting tooth 104 of the rear tooth leaks out.

The width of the groove 106 can be 12cm-22cm, the depth of the groove 106 can be 3cm-12cm, and before the tooth cavity is processed, the front end of the blade 102 of the first cutting tooth 104 is provided with the groove 106 with the maximum width of 15mm, and the depth of the groove 106 is 5-7mm correspondingly, so that the tooth surface of the first cutting tooth 104 is level with the front end of the blade 102.

In this embodiment, the first cutting tooth 104 and the second cutting tooth 105 may be referred to as non-planar teeth or planar teeth, and multiple tooth shapes may cope with different excavation types, so as to improve cutting efficiency, avoid the situation that the bit adopts the concave cutting tooth as the crown cutting tooth of the coring bit, only improve cutting of a single tooth, and not actually improve interaction among the cutting teeth.

In this embodiment, the first cutting tooth 104 and the second cutting tooth 105 are both diamond compacts, and by using the diamond compacts as the materials of the first cutting tooth 104 and the second cutting tooth 105, the life of the first cutting tooth 104 and the second cutting tooth 105 is increased and the drilling efficiency is improved.

In some alternative embodiments, as shown in fig. 1-2, the first cutting teeth 104 and the second cutting teeth 105 are provided with a plurality of first cutting teeth 104 and second cutting teeth 105, the first cutting teeth 104 and the second cutting teeth 105 are arranged in a front-back staggered manner, the front end shape of the corresponding blade 102 is also wavy according to the arrangement of the first cutting teeth 104 and the second cutting teeth 105, the first cutting teeth 104 are rear teeth positioned at the rear side, the second cutting teeth 105 are front teeth positioned at the front side, the first cutting teeth 104 and the second cutting teeth 105 cover the whole bottom of the well from inside to outside, the distance between the cutting surfaces of the teeth is increased, the influence on the compaction effect of adjacent teeth in the cutting process of the cutting teeth in the stratum is reduced, so that the purpose of efficient cutting is achieved, the core acquisition speed of the coring bit is improved, and the mutual influence caused by the too small distance between the adjacent teeth in the cutting process of the teeth is avoided.

In this embodiment, the first cutting tooth 104 is a rear cutting tooth, the second cutting tooth 105 is a front cutting tooth, and in this embodiment, as shown in fig. 1, the diameters of the first cutting tooth 104 and the second cutting tooth 105 are 13mm, and the diameters of the first cutting tooth 104 and the second cutting tooth 105 are different and can be used for different ground environment construction.

The grooves 106 are used for assisting the cutting of the first cutting teeth 104, the first cutting teeth 104 are leaked through the arrangement of the grooves 106, and the situation that the first cutting teeth 104 cannot contact the stratum for cutting due to the fact that the tooth surfaces of the first cutting teeth 104 are lower than the end surfaces of the blades 102 is avoided.

Because the first cutting teeth 104 are rear teeth, the positions of the first cutting teeth 104 relative to the second cutting teeth 105 are shifted backwards by 5-7mm, so that the first cutting teeth 104 and the second cutting teeth 105 are staggered, and the tooth surfaces of the first cutting teeth 104 which are shifted backwards cannot be flush with the front ends of the blades 102 due to the arrangement of the grooves 106, so that the first cutting teeth 104 cannot touch the stratum and cannot cut.

In some alternative embodiments, referring to fig. 1-2, a water hole 103 is further formed on the drill bit body 101, and a water hole 103 is disposed between each two blades 102, and water flows through the water hole 103, so as to cool the first cutting teeth 104 and the second cutting teeth 105, and carry rock debris upwards, thereby assisting the cutting operation.

In this embodiment, the water hole 103 may be used to connect with a nozzle, and the water flow may be adjusted to be directed to a specified angle position for spraying through the spraying direction of the nozzle, so as to improve the working efficiency of the water flow.

In this embodiment, the water hole 103 may be a through hole, so that water flows directly through the water hole 103 to perform water outflow.

The working principle and the working process of the utility model are as follows:

when the drill bit is used for drilling into the stratum, the first cutting teeth 104 and the second cutting teeth 105 are driven by the drill bit body 101 to rotate, and when the first cutting teeth 104 and the second cutting teeth 105 which are staggered are used for cutting and rotating, the distance between tooth cutting surfaces is increased, the influence on the compaction action of adjacent teeth in the cutting process of the first cutting teeth 104 and the second cutting teeth 105 in the plastic stratum is reduced, so that the purpose of efficient cutting is achieved, and the core acquisition speed of the coring drill bit is improved.

In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that in the present utility model, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is only a specific embodiment of the utility model to enable those skilled in the art to understand or practice the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A front and rear tooth blade coring bit, comprising:

a bit body (101), the bit body (101) being mounted on a power device;

the cutter blade (102), the cutter blade (102) is arranged at one end of the drill bit body (101), and the cutter blade (102) comprises first cutting teeth (104) and second cutting teeth (105) which are arranged in a staggered mode front and back;

the blade (102) is also provided with a groove (106) for assisting cutting.

2. The front and rear tooth blade core bit as defined in claim 1, wherein:

the blades (102) are circumferentially distributed on the end face of the drill bit body (101).

3. The front and rear tooth blade core bit as defined in claim 1, wherein:

the first cutting teeth (104) and the second cutting teeth (105) are all in a plurality, and the first cutting teeth (104) and the second cutting teeth (105) are arranged in a front-back staggered mode.

4. A front and rear tooth blade core bit as defined in claim 3, wherein:

the first cutting teeth (104) are rear cutting teeth, and the second cutting teeth (105) are front cutting teeth;

the recess (106) is used to assist the first cutting tooth (104) in cutting.

5. The front and rear tooth blade core bit as defined in claim 1, wherein:

the groove (106) is formed at the front end of the blade (102).

6. The front and rear tooth blade core bit as defined in claim 1, wherein:

the drill bit is characterized in that a water hole (103) is further formed in the drill bit body (101), and the water hole (103) is formed between every two blades (102).

7. The front and rear tooth blade core bit as defined in claim 6, wherein:

the water holes (103) can be used for connecting nozzles.

8. The front and rear tooth blade core bit as defined in claim 6, wherein:

the water hole (103) can also be a through hole.

9. The front and rear tooth blade core bit as defined in claim 1, wherein:

the first cutting tooth (104) and the second cutting tooth (105) may be non-planar or planar.

10. The front and rear tooth blade core bit as defined in claim 1, wherein:

the first cutting teeth (104) and the second cutting teeth (105) are diamond composite sheets.