CN217055076U

CN217055076U - Novel three-wing rib type polycrystalline diamond compact coring bit

Info

Publication number: CN217055076U
Application number: CN202123421969.0U
Authority: CN
Inventors: 孟祥森; 梁治国
Original assignee: Nuke Industry No216 Brigade
Current assignee: Nuke Industry No216 Brigade
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-07-26
Anticipated expiration: 2031-12-31

Abstract

The utility model relates to the technical field of drilling tools, in particular to a novel three-wing rib type polycrystalline diamond compact coring bit, which comprises a rib body, a blade body, a bit body and a water gap; the bit body is a thin-wall hollow cylinder, and the three groups of the blade bodies are uniformly distributed on the front end face of the crown of the bit body and form an included angle of 120 degrees with each other; the three groups of rib bodies are distributed at the connecting part of the blade body and the outer side of the bit body. The utility model has simple structure, reasonable design and convenient manufacture, adopts three groups of blades, a plurality of groups of cutting teeth and the special design of the blades and the water gap, can effectively prevent the passivation of the drill bit mud bag and improve the drilling efficiency; the rib body is added, so that the problem of the strength of the blade caused by the reduction of the number of the blades is effectively solved, the service life of the drill bit is prolonged, the drilling efficiency is improved, and the drilling cost is saved.

Description

Novel three-wing rib type polycrystalline diamond compact coring bit

Technical Field

The utility model relates to a drilling tool technical field, concretely relates to novel three wing rib formula polycrystalline diamond compact coring bit.

Background

Polycrystalline diamond compact bits are a common drilling tool in the industries of oil drilling, geological drilling and the like. The polycrystalline diamond compact which is sharp, high in wear resistance and capable of being self-sharpened is used as a cutting element, and volume damage can be caused to a rock stratum under low drilling pressure, so that the drilling speed is remarkably increased.

In the drilling process, the polycrystalline diamond compact bit has the high performance advantages of high drilling speed, low drilling pressure, high footage and the like, and the application of the polycrystalline diamond compact bit in the drilling engineering can reduce the energy consumption in the drilling process, accelerate the hole forming speed and effectively improve the economic benefit of the drilling engineering. The quality of polycrystalline diamond compact drill bit guarantees its root that can effectively exert effect, and polycrystalline diamond compact drill bit's quality is closely relevant with its self structure, material and preparation technology, and current a series of polycrystalline diamond compact drill bits can only be used for softer shale stratum because of the influence of quality factors such as its self material and structure for polycrystalline diamond compact drill bit's application and popularization receive the hindrance.

The polycrystalline diamond compact bit in the prior art has a limited application range, and when the drill encounters a plastic mudstone stratum with good cementation and compactness, the cutting tool has insufficient impact strength due to the structural problem of the bit, and is continuously impacted in the tripping and normal drilling processes, so that the cutting tool is cracked, and the service life of the bit is shortened. Meanwhile, mud in the stratum is easily adsorbed on the cutting tool, so that the cutting tool is passivated, the contact pressure of the cutting tool and the rock is far less than the hardness of the rock, the drill bit is difficult to cut into the rock, the rock crusher of the drill bit is changed from volume crushing into surface crushing, the drilling speed is reduced, the core sampling rate is reduced, the drilling operation period is prolonged, and the drilling cost is increased.

Disclosure of Invention

In view of the above problem, the utility model provides a novel three wing rib formula polycrystalline diamond compact coring bit has rational in infrastructure, stability is high, make convenient structural feature, and it is good still to have impact resistance, prevents that the cutting from having the mud bag passivation, can provide higher rock contact pressure and the effectual technical feature of coring.

The utility model discloses a following technical scheme realizes:

a novel three-wing rib type polycrystalline diamond compact coring bit comprises a rib body, a blade body, a bit body and a water gap;

the drill bit body is a thin-wall hollow cylinder;

the three groups of rib bodies are distributed at the connecting part of the blade body and the outer side of the bit body;

the cutter wing bodies are distributed on the front end face of the bit body crown uniformly and form an included angle of 120 degrees with each other; the front end surface of the blade body is brazed with main cutting teeth, and the inner end surface is brazed with inner gauge teeth.

The cutting surfaces of the main cutting teeth and a plane perpendicular to the axis of the bit body form a preset angle.

The front end face of the rib body is brazed with auxiliary cutting teeth and reinforced cutting teeth, and the outer end face is brazed with outer gauge protection teeth.

The cutting surfaces of the auxiliary cutting teeth and the plane vertical to the axis of the drill bit body form a preset angle, and the cutting surfaces of the reinforced cutting teeth are parallel to the axis of the drill bit body.

The inner gauge tooth and the outer gauge tooth are in a long strip shape and are parallel to the axis of the drill bit body.

The water gap is triangular, the opening direction points to the front end face of the adjacent blade wing body, and fluid is guided to wash and purify the front end face of the blade wing body.

The main cutting teeth, the auxiliary cutting teeth and the reinforced cutting teeth are made of circular-sheet type, half-sheet type, pointed-tooth type or ridge type polycrystalline diamond composite sheets.

The inner gauge teeth and the outer gauge teeth are made of hard alloy strips.

The utility model discloses have following advantage and beneficial effect:

1. the utility model provides a three wing physical stamina is guaranteeing as far as under the drill bit gyration steady circumstances, reduces the area of contact of drill bit cutting utensil and rock as far as to increase the contact pressure of drill bit cutting utensil and rock, make the rock produce the volume breakage, promote detritus efficiency.

2. The rib body can share the impact force on the blades in the drilling process under the condition of reducing the blades of the drill bit, ensure the impact strength of each blade, protect the cutting teeth from the phenomena of fracture, delamination, tooth breakage and the like, and prolong the service life of the drill bit.

3. Three evenly distributed water gaps have the angle inclined to the corresponding blade, and drilling fluid jet flow can be guided to the cutting surface of the blade body during drilling, so that rock debris stripped by the blade body is pushed to be quickly separated, and cutting tool mud bags are prevented from being passivated, so that the drilling speed is increased.

4. The utility model discloses the drill bit is provided with multiunit polycrystalline diamond compact cutting teeth, inside and outside gauge protection cutting teeth, can effectively disperse the power that creeps into in-process stratum and act on the drill bit, makes the power that single cutting tooth bore littleer, is applicable to multiple sedimentary rock stratum.

5. The utility model has simple structure, reasonable design and convenient manufacture, adopts three groups of blades, a plurality of groups of cutting teeth and the special design of the blades and the water gap, can effectively prevent the passivation of the drill bit mud bag and improve the drilling efficiency; the rib body is added, so that the problem of the strength of the blade caused by the reduction of the number of the blades is effectively solved, the service life of the drill bit is prolonged, the drilling efficiency is improved, and the drilling cost is saved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a top view of the present invention;

FIG. 2 is a front view of the present invention;

the reference numerals are explained below:

the cutting tool comprises a rib body 1, a cutter wing body 2, a drill body 3, a water gap 4, an inner gauge protection tooth 5, an outer gauge protection tooth 6, a main cutting tooth 7, an auxiliary cutting tooth 8 and a reinforced cutting tooth 9.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

A novel three-wing rib type polycrystalline diamond compact coring bit comprises a rib body 1, a blade body 2, a bit body 3 and a water gap 4;

the drill bit body 3 is a thin-wall hollow cylinder;

the three groups of rib bodies 1 are distributed at the connecting part of the blade body 2 and the outer side of the bit body 3;

the blade bodies 2 are uniformly distributed on the front end face of the crown of the bit body 3 and form an included angle of 120 degrees with each other;

the front end face of the blade body 2 is brazed with main cutting teeth 7, and the inner end face is brazed with inner gauge protection teeth 5.

The cutting faces of the primary cutting teeth 7 are all at a predetermined angle to a plane perpendicular to the axis of the bit body 3.

The front end surface of the rib body 1 is brazed with an auxiliary cutting tooth 8 and a reinforced cutting tooth 9, and the outer end surface is brazed with an outer gauge protection tooth 6.

The cutting surfaces of the auxiliary cutting teeth 8 and a plane perpendicular to the axis of the bit body 3 form a preset angle, and the cutting surfaces of the reinforced cutting teeth 9 and the axis of the bit body 3 are parallel.

The inner gauge teeth 5 and the outer gauge teeth 6 are strip-shaped and are parallel to the axis of the bit body 3.

The water gap 4 is triangular, the opening direction points to the front end face of the adjacent blade body 2, and fluid is guided to wash and purify the front end face of the blade body 2.

The main cutting teeth 7, the auxiliary cutting teeth 8 and the reinforced cutting teeth 9 are made of a disc type, a half-disc type, a cusp type or a ridge type polycrystalline diamond compact.

The inner gauge teeth 5 and the outer gauge teeth 6 are made of hard alloy strips.

A certain geological team is firstly adopted in the Pascal basin-like region the utility model discloses the rock core drilling work of about 500 meters has been carried out. According to the technical data of about 20 times of statistics, adopt the utility model discloses afterwards, it is 0.61 hours, average time of return footage is 4.71m, average pure boring hour efficiency can reach 7.8m/h, average rock core rate of taking is 97.76% to bore average time of return. Contrast traditional polycrystalline diamond compact piece coring bit and bore 0.5 ~ 2.5m/h in the pure of fine and close plasticity mudstone hour efficiency, the utility model discloses pure efficiency promotes about 3 times in the hour.

Claims

1. The utility model provides a novel three wing rib formula polycrystalline diamond compact coring bit which characterized in that: comprises a rib body (1), a blade body (2), a bit body (3) and a water gap (4); the drill bit body (3) is a thin-wall hollow cylinder; the three groups of rib bodies (1) are distributed at the connecting part of the blade body (2) and the outer side of the bit body (3); the cutter wing bodies (2) are distributed on the front end face of the crown of the bit body (3) uniformly and form an included angle of 120 degrees with each other; the front end face of the blade body (2) is brazed with main cutting teeth (7), and the inner end face is brazed with inner gauge protection teeth (5).

2. The novel tri-wing rib type polycrystalline diamond compact coring bit according to claim 1, wherein: the cutting surfaces of the main cutting teeth (7) form a preset angle with a plane vertical to the axis of the drill bit body (3).

3. The novel tri-wing rib type polycrystalline diamond compact coring bit according to claim 1, wherein: the front end surface of the rib body (1) is brazed with an auxiliary cutting tooth (8) and a reinforced cutting tooth (9), and the outer end surface is brazed with an outer gauge protection tooth (6).

4. The novel tri-wing rib type polycrystalline diamond compact coring bit according to claim 3, wherein: the cutting surfaces of the auxiliary cutting teeth (8) and a plane perpendicular to the axis of the bit body (3) form a preset angle, and the cutting surfaces of the reinforced cutting teeth (9) are parallel to the axis of the bit body (3).

5. The novel tri-wing rib type polycrystalline diamond compact coring bit according to claim 1, wherein: the inner gauge teeth (5) and the outer gauge teeth (6) are long-strip-shaped and are parallel to the axis of the bit body (3).

6. The novel three-wing rib type polycrystalline diamond compact coring bit according to claim 1, wherein: the water gap (4) is triangular, the opening direction points to the front end face of the adjacent blade body (2), and fluid is guided to wash and purify the front end face of the blade body (2).

7. The novel tri-wing rib type polycrystalline diamond compact coring bit according to any one of claims 2-4, wherein: the main cutting teeth (7), the auxiliary cutting teeth (8) and the reinforced cutting teeth (9) are made of a disc type, a half-disc type, a cusp type or a ridge type polycrystalline diamond compact.

8. The novel three-wing rib type polycrystalline diamond compact coring bit according to claim 5, wherein: the inner gauge teeth (5) and the outer gauge teeth (6) are made of hard alloy strips.