CN210105760U - Non-excavation combination formula PDC reaming bit - Google Patents

Abstract

The utility model discloses a non-excavation combined PDC expanding bit, which belongs to the technical field of drill bits and comprises a main shaft, a fixed disc and a plurality of expanding fins, wherein the fixed disc is sleeved outside the main shaft, the fixed disc is in interference fit or fixed connection with the main shaft, the plurality of expanding fins are circumferentially distributed around the main shaft, and the plurality of expanding fins are detachably connected with the main shaft and the fixed disc; each reaming wing sheet is provided with a plurality of cutting teeth; can all dismantle with main shaft and fixed disk through a plurality of reaming fins and be connected, or a plurality of reaming fins all can dismantle with the fixed disk and be connected, can reach the cutting teeth of renewal or reach the cutting teeth of changing different types through changing the reaming fin, can improve reaming efficiency on the one hand, on the other hand can only need to carry different reaming fins and can satisfy the demand in different stratums at the in-process of construction, greatly reduced construction cost.

Description

Non-excavation combination formula PDC reaming bit

Technical Field

The utility model belongs to the technical field of the reamer bit, concretely relates to non-excavation combination formula PDC reamer bit.

Background

Polycrystalline diamond compacts (pdc), which are polycrystalline diamond compacts, are a composite material formed of polycrystalline diamond (PCD) and a cemented carbide substrate. It has both high hardness and certain toughness and shock resistance of PCD, and is one important superhard cutter material. The drill bit made of the material has wide application in underground resource drilling and production engineering.

Most of the conventional PDC hole expanding drill bits are of a welding structure, each drill bit is relatively independent, and cutting teeth of the hole expanding drill bits cannot be replaced basically after being worn and can only be additionally welded; before welding, the original cutting teeth need to be ground flat, otherwise cutting is affected, and the construction period is prolonged; the existing other reamer bits have limitations when applied to engineering construction due to different structures, different types need to be prepared by a construction party according to different stratum conditions, and the reamer bits with different structures are multiple, so that the construction cost is greatly improved.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned problem that prior art exists, the utility model provides a non-excavation combination formula PDC reamer bit.

The utility model discloses the technical scheme who adopts does: a non-excavation combined PDC (polycrystalline diamond compact) reaming bit comprises a main shaft, a fixed disc and a plurality of reaming fins, wherein the fixed disc is sleeved outside the main shaft, the fixed disc is in interference fit or fixedly connected with the main shaft, the reaming fins are circumferentially distributed around the main shaft, and the reaming fins are detachably connected with the main shaft and the fixed disc; each reaming fin is provided with a plurality of cutting teeth.

The utility model discloses a theory of operation beneficial effect does: can all dismantle with main shaft and fixed disk through a plurality of reaming fins and be connected, or a plurality of reaming fins all can dismantle with the fixed disk and be connected, can reach the cutting teeth of renewal or reach the cutting teeth of changing different types through changing the reaming fin, can improve reaming efficiency on the one hand, on the other hand can only need to carry different reaming fins and can satisfy the demand in different stratums at the in-process of construction, greatly reduced construction cost.

Further defined, the plurality of reaming wings are all clamped with the fixed disk.

The utility model discloses a theory of operation beneficial effect does: the clamping mode does not need any other auxiliary parts, so that the cost can be reduced on one hand, and the parts can be prevented from being lost in the disassembling process on the other hand.

Further limit, a plurality of mud discharging holes are formed in the disc surface of the fixed disc.

The utility model discloses a theory of operation beneficial effect does: the mud discharging hole is used for assisting the discharge of mud, and the reamer bit is prevented from being blocked in the reaming process.

It is further defined that a plurality of said reamer wings are each connected to said main shaft by a bolt assembly.

The utility model discloses a theory of operation beneficial effect does: the bolt assembly connection has the characteristics of convenient disassembly and firm fixation.

Further define, it has a plurality of clip subassemblies to extend its axial direction integrated into one piece on the main shaft, can dismantle on every clip subassembly and be connected with one the reaming fin.

The utility model discloses a theory of operation beneficial effect does: the clamping piece assembly is used for clamping the reaming wing pieces, and the phenomenon that the reaming wing pieces shift in the using process is avoided.

Each clamping piece component consists of two clamping pieces which are arranged oppositely, and each clamping piece is fixedly connected with the main shaft; set up one between two clamping pieces the reaming fin, the reaming fin all is connected through bolt assembly with two clamping pieces.

Further inject, a plurality of first draw-in grooves have been seted up along its diameter direction on the fixed disk, the lower extreme card of each reaming fin is located one in the first draw-in groove.

Further limiting, a fixing plate is integrally formed at one end, close to the circle center of the fixed disc, of each first clamping groove, and the fixing plate is attached to the spindle;

the fixed plate is perpendicular to the disc surface of the fixed disc, the fixed plate deviates from a second clamping groove is formed in one side of the circle center of the fixed disc, and the second clamping groove is matched with the reaming fins.

The utility model discloses a theory of operation beneficial effect does: first draw-in groove and second draw-in groove all are used for the card to establish the reaming fin to further promote the stability of reaming fin installation.

Drawings

Fig. 1 is a schematic view of the structure of a viewing angle of the present invention;

fig. 2 is a schematic structural view of another viewing angle of the present invention;

FIG. 3 is a view in the direction of C in FIG. 2;

FIG. 4 is a schematic view of section A-A of FIG. 3;

FIG. 5 is a schematic structural view of a fixing disk;

in the figure: 1-a main shaft; 101-a clip; 2-fixing the disc; 201-mud discharging holes; 202-a first card slot; 203-fixing plate; 3-reaming wings; 4-cutting teeth.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be 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 according to specific situations by those skilled in the art.

In the description of the present invention, some structures or devices are not specifically described, and it is understood that there are structures or devices that can be implemented in the prior art.

Example 1

The technical scheme of the embodiment is as follows: a non-excavation combined PDC (polycrystalline diamond compact) reaming bit comprises a main shaft 1, a fixed disc 2 and a plurality of reaming fins 3, wherein the fixed disc 2 is sleeved outside the main shaft 1, the fixed disc 2 is in interference fit or fixed connection with the main shaft 1, the reaming fins 3 are circumferentially distributed around the main shaft 1, and the reaming fins 3 are detachably connected with the main shaft 1 and the fixed disc 2; each reaming fin 3 is provided with a plurality of cutting teeth 4.

And the reaming wings 3 are clamped with the fixed disc 2. A plurality of sludge discharge holes 201 are arranged on the disc surface of the fixed disc 2. The reaming wings 3 and the main shaft 1 are connected through bolt assemblies. The main shaft 1 is integrally formed with a plurality of clamping pieces 101 along the axial direction of the main shaft, and each clamping piece 101 is detachably connected with one reaming fin 3. Each clamping piece 101 component consists of two clamping pieces 101 which are oppositely arranged, and each clamping piece 101 is fixedly connected with the main shaft 1; set up one between two clamping pieces 101 reaming fin 3, reaming fin 3 all is connected through bolt assembly with two clamping pieces 101. A plurality of first clamping grooves 202 are formed in the fixed disc 2 along the diameter direction of the fixed disc, and the lower end of each hole expansion wing piece 3 is clamped in one first clamping groove 202. A fixing plate 203 is integrally formed at one end of each first clamping groove 202 close to the circle center of the fixed disk 2, and the fixing plate 203 is attached to the spindle 1; the fixed plate 203 is perpendicular to the disc surface of the fixed disc 2, a second clamping groove is formed in one side, deviating from the circle center of the fixed disc 2, of the fixed plate 203, and the second clamping groove is matched with the reaming fins 3.

As shown in fig. 1 to 4, in the present embodiment, the main shaft 1 is a solid cylindrical structure, and the outer surface of the main shaft 1 is smooth; the fixed disk 2 is of a circular structure, 3 sludge discharge holes 201 are formed in the disk surface of the fixed disk 2, and the 3 sludge discharge holes 201 are communicated to form a large sludge discharge through hole; 3 clamping grooves are formed in the disc surface of the fixed disc 2, the number of the reaming fins 3 is 3, the reaming fins are distributed along the circumferential direction of the main shaft 1, the distance between any two of the 3 reaming fins 3 is equal, the reaming fins 3 are of arc-shaped structures, one end, close to the main shaft 1, of each arc-shaped structure is far away from the fixed disc 2, the number of the cutting teeth 4 is 10, and all the cutting teeth 4 are welded on the arc-shaped edges of the reaming fins 3; extend its axial direction fixedly connected with 3 clamping piece 101 subassemblies on main shaft 1, every clamping piece 101 subassembly all includes the clamping piece 101 of two relative settings, is provided with one between the clamping piece 101 of two relative settings reaming fin 3, reaming fin 3 realizes detachable through bolt assembly and the clamping piece 101 of two relative settings and is connected, specifically does: the two oppositely arranged clamping pieces 101 and the reaming wing pieces 3 are respectively provided with 3 through holes; one through hole on the two oppositely arranged clamping pieces 101 and one through hole on the reaming fin 3 are on the same straight line, and a bolt is arranged through the three through holes on the same straight line, and one end of the bolt is in threaded connection with a nut to form a connecting structure; three first draw-in grooves 202 have been seted up on fixed disk 2, each first draw-in groove 202 and one 3 joints of reaming fin specifically are: the lower end of the reaming wing piece 3 is clamped in the first clamping groove 202; a fixing plate 203 is integrally formed at one end, close to the circle center of the fixed disk 2, of the first clamping groove 202, the fixing plate 203 is of an L-shaped structure, the horizontal side of the L-shaped structure and one end, close to the circle center of the fixed disk 2, of the first clamping groove 202 are integrally formed, and the vertical sides of the three L-shaped structures are on the same circle and are attached to the spindle 1; a second clamping groove is formed in one side, deviating from the main shaft 1, of the vertical edge of the L-shaped structure, the reaming wing pieces 3 face the main shaft 1, protruding blocks are formed on the surface of the main shaft in a protruding mode, and the protruding blocks are clamped in the second clamping groove.

The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.

Claims (8)

1. A non-excavation combined PDC (polycrystalline diamond compact) reaming bit is characterized by comprising a main shaft, a fixed disc and a plurality of reaming fins, wherein the fixed disc is sleeved outside the main shaft, the fixed disc is in interference fit or fixedly connected with the main shaft, the reaming fins are distributed around the circumference of the main shaft, and the reaming fins are detachably connected with the main shaft and the fixed disc; each reaming fin is provided with a plurality of cutting teeth.

2. The trenchless assembled PDC reamer bit of claim 1, wherein each of the plurality of reamer wings is snap-fit to the retaining disk.

3. The trenchless combined PDC reaming bit as claimed in claim 1 or 2, wherein a plurality of mud discharging holes are formed on the disc surface of the fixed disc.

4. The trenchless assembled PDC reamer bit of claim 1, wherein the plurality of reamer wings and the main shaft are each connected by a bolt assembly.

5. The trenchless assembled PDC reamer bit of claim 4, wherein the main shaft is integrally formed with a plurality of clip assemblies along an axial direction thereof, each clip assembly having one of the reamer wings detachably attached thereto.

6. The trenchless assembled PDC reamer bit of claim 5, wherein each of the clip assemblies is comprised of two oppositely disposed clips, each clip being fixedly attached to the main shaft; set up one between two clamping pieces the reaming fin, the reaming fin all is connected through bolt assembly with two clamping pieces.

7. The trenchless combined PDC reamer bit of claim 2, wherein the fixed disk is provided with a plurality of first engaging grooves along a diameter direction thereof, and a lower end of each of the reamer wings is engaged with one of the first engaging grooves.

8. The trenchless combined PDC reamer bit of claim 7, wherein a fixing plate is integrally formed at one end of each first clamping groove close to the center of the fixed disc, and the fixing plate is attached to the main shaft;

the fixed plate is perpendicular to the disc surface of the fixed disc, the fixed plate deviates from a second clamping groove is formed in one side of the circle center of the fixed disc, and the second clamping groove is matched with the reaming fins.

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