CN213116176U - Impact-resistant PDC drill bit - Google Patents

Abstract

The utility model provides an impact-resistant PDC drill bit, which comprises a drill bit main body, wherein the top of the drill bit main body is respectively fixedly provided with a rubber cushion and an installation rod, the front surface of the installation rod is embedded with a bolt, the outer wall of the installation rod is embedded with a positioning groove, the outer wall of the positioning groove is fixedly provided with a gear strip, the top of the installation rod is embedded with a water inlet hole, the outer wall of the drill bit main body is embedded with a diversion groove, the bottom of the drill bit main body is respectively fixedly provided with a drill point, a buffer spring and a mounting groove, the inside of the drill bit main body is embedded with a wear-resistant layer, a thermal-insulating layer and a reinforcing rib, the inside of the reinforcing rib is embedded with a water inlet pipe, the bottom of the water inlet pipe is fixedly provided with a drain pipe, the inside of the mounting groove is movably connected with a connecting, the problem that the damage rate of the impact-resistant PDC drill bit is higher is solved through the arranged spring, the reinforcing ribs and the wear-resistant layer.

Description

Impact-resistant PDC drill bit

Technical Field

The utility model relates to a drill bit field especially relates to a PDC drill bit shocks resistance.

Background

Along with the increase of world energy demand, unconventional oil and gas resources such as dense gas with certain potential are increasingly paid high attention by various countries. The reservoir of the compact gas well region is mainly a complex sedimentary rock stratum, and the borehole trajectory of the compact gas well region is easy to change due to the pressure of the underground reservoir and drill cuttings. Meanwhile, in the long horizontal section of the tight gas horizontal well, the drilling parameters can be changed due to the reservoir pressure. The corresponding drilling costs, drilling techniques and processes, tool performance, and the ability to prevent and treat downhole complications are faced with challenges and challenges. Based on the research of the drilling construction scheme of the optimized compact gas well region, the risk is avoided, the construction cost is reduced, the most effective means of improving the drilling speed can be adopted, but the deep stratum drilling has the defects of high compaction strength and strong rock abrasiveness.

However, the wear rate of the conventional impact-resistant PDC drill bit is high in the using process, so that the conventional drill bit is inconvenient to use for a long time, and the conventional drill bit is easily damaged due to the influence of external factors in the using process, and the damage rate of the conventional drill bit is improved.

Therefore, there is a need to provide an impact resistant PDC bit that solves the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a PDC drill bit shocks resistance has solved the PDC drill bit spoilage that shocks resistance than higher and the drill bit is not convenient for carry out the problem of using for a long time.

In order to solve the technical problem, the utility model provides a shock-resistant PDC drill bit, which comprises a drill bit main body, wherein the top of the drill bit main body is respectively and fixedly provided with a rubber cushion and an installation rod, the front surface of the installation rod is embedded with a bolt, the outer wall of the installation rod is embedded with a positioning groove, the outer wall of the positioning groove is fixedly provided with a gear strip, the top of the installation rod is embedded with a water inlet hole, the outer wall of the drill bit main body is embedded with a diversion groove, the bottom of the drill bit main body is respectively and fixedly provided with a drill point, a buffer spring and a mounting groove, the interior of the drill bit main body is respectively embedded with a wear-resistant layer, a thermal-insulating layer and a reinforcing rib, the interior of the reinforcing rib is embedded with a water inlet pipe, the bottom of the water inlet pipe is fixedly provided with a drain pipe, the, and a bolt penetrates through the drill tip.

Preferably, the diversion trench is wholly spiral, the inner diameter of the diversion trench is equal to the outer diameter of the drill bit main body, and the diversion trench is embedded in the outer wall of the drill bit main body.

Preferably, the drain pipe is provided with two, two the drain pipe symmetry sets up the bottom at the inlet tube, the drain pipe imbeds in the drill bit main part.

Preferably, the positioning groove comprises a rack on the outer wall of the positioning groove, the inner diameter of the positioning groove is equal to the outer diameter of the rack, and the positioning groove is embedded in the installation rod.

Preferably, the drill tip comprises diamond at the bottom of the drill tip, the outer diameter of the top of the drill tip is equal to the outer diameter of the bottom of the drill bit body, and the drill tip is fixedly connected with the drill bit body through a bolt.

Preferably, the spring is located between the drill bit main body and the drill tip, the spring is uniformly arranged at the bottom of the drill bit main body, and the spring is fixedly connected with the drill bit main body.

Preferably, the diamonds are uniformly distributed at the bottom of the drill tip, the diamonds are uniformly arranged into a circle center, and the diamonds are fixedly connected with the drill tip.

Compared with the prior art, the utility model provides a pair of PDC drill bit shocks resistance has following beneficial effect:

the utility model provides an impact-resistant PDC drill bit, the problem that the damage rate of the impact-resistant PDC drill bit is higher is solved through the arranged spring, the reinforcing rib and the wear-resistant layer, in the process of drilling the drill bit, the drill point at the bottom of the drill bit main body is firstly pressed by the drilling surface to push the connecting rod at the top to move towards the inner side of the mounting groove, in the process, the filling cotton in the mounting groove is compressed under stress to fill the gap between the connecting rod and the mounting groove, thereby being beneficial to improving the tightness between the connecting rod and the mounting groove and reducing the probability of angular deviation of the drill point, meanwhile, the spring at the bottom of the drill bit main body is compressed under stress to buffer the pressure of the drill point, thereby being beneficial to reducing the pressure of the drill bit main body, the wear-resistant layer is arranged at the outer side of the drill bit main body, the hardness of the wear-, can effectual reduction drill bit main part's rate of wear, the wearing layer can be simultaneously through surperficial guiding gutter will creep into the top that drill bit main part was guided fast to earth and rubble that the in-process produced, reduce the side pressure that drill bit main part received, the strengthening rib sets up inside drill bit main part, and the toughness of strengthening rib and the ability of anti bearing are stronger, thereby can effectively improve the drill bit main part and bear external pressure, be favorable to reducing the cracked probability of drill bit main part, this drill bit passes through mutually supporting of each structure, can improve holistic intensity of drill bit main part and wear resistance, thereby the effectual spoilage that has reduced this drill bit.

The utility model provides a shock-resistant PDC drill bit, adopt the inlet tube, drill point and insulating layer that set up, solved the problem that this shock-resistant PDC drill bit is not convenient for long-time use, when the drill bit normally works, the drill bit main part can take place violent friction with the probing face, produce a large amount of heat, can fill water to the inlet opening at installation pole top through the external connecting tube at this moment, make external cold water loop through the inlet tube and the drain pipe of drill bit main part inside and discharge to the outside of drill bit main part, the cold water of emission not only can reduce the high temperature that the violent friction of drill bit main part produced fast, also can lubricate the drill bit main part surface simultaneously, reduce the frictional force that the drill bit main part surface received, be favorable to reducing the rate of wearing and tearing of drill bit main part, thereby improve the live time of this drill bit, the drain pipe is provided with two, also can prevent simultaneously because the too much phenomenon that makes the drilling too moist thereby leading to the drilling collapse of drain pipe exhaust cold water, the insulating layer sets up inside drill bit main part, can be with the high temperature isolated drill bit main part outside that produces among the drilling process, be favorable to reducing the probability that this high temperature leads to the inside crackle that produces of drill bit main part with the inside cold water interact of inlet tube, the drill point passes through the bolt fastening in drill bit main part bottom, and bolted connection's mode is fairly simple, can make things convenient for the quick replacement work when great wearing and tearing or damage appear at the drill point, thereby be convenient for the drill bit main part to use for a long time.

Drawings

FIG. 1 is a schematic structural view of a preferred embodiment of an impact resistant PDC drill bit provided by the present invention;

FIG. 2 is an internal cross-sectional view of the drill of the present invention;

fig. 3 is an enlarged schematic view of fig. a according to the present invention.

Reference numbers in the figures: 1. a drill bit body; 101. a wear layer; 102. a thermal insulation layer; 103. reinforcing ribs; 104. a water inlet pipe; 1041. a drain pipe; 105. a spring; 106. mounting grooves; 1061. filling cotton; 2. a diversion trench; 3. drilling a tip; 301. diamond; 302. a connecting rod; 303. a bolt; 4. a bolt; 5. positioning a groove; 6. a water inlet hole; 7. a gear rack; 8. a rubber pad; 9. and (5) installing a rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the technical scheme in the utility model, all other embodiments that ordinary skilled person in the art obtained under the prerequisite of not making the creative work all belong to the scope of the utility model protection.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, 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 in specific cases to those skilled in the art.

Referring to fig. 1, fig. 2 and fig. 3, wherein fig. 1 is a schematic structural diagram of a preferred embodiment of an impact-resistant PDC drill bit according to the present invention; FIG. 2 is an internal cross-sectional view of the drill of the present invention; fig. 3 is an enlarged schematic view of fig. a according to the present invention. An impact-resistant PDC drill bit comprises a drill bit main body 1, wherein the top of the drill bit main body 1 is respectively fixedly provided with a rubber cushion 8 and an installation rod 9, the front surface of the installation rod 9 is embedded with a bolt 4, the outer wall of the installation rod 9 is embedded with a positioning groove 5, the outer wall of the positioning groove 5 is fixedly provided with a gear strip 7, the top of the installation rod 9 is embedded with a water inlet hole 6, the outer wall of the drill bit main body 1 is embedded with a diversion groove 2, the bottom of the drill bit main body 1 is respectively fixedly provided with a drill point 3, a buffer spring 105 and a mounting groove 106, the inside of the drill bit main body 1 is respectively embedded with a wear-resistant layer 101, a thermal-insulating layer 102 and a reinforcing rib 103, the inside of the reinforcing rib 103 is embedded with a water inlet pipe 104, the bottom of the water inlet pipe 104 is fixedly provided with a drain pipe 1041, the drill tip 3 has a bolt 303 inserted therein.

Further, the diversion trench 2 is wholly 'spiral', the inner diameter of the diversion trench 2 is equal to the outer diameter of the drill bit main body 1, the diversion trench 2 is embedded into the outer wall of the drill bit main body 1, soil and gravels generated in the drilling process are rapidly guided to the top of the drill bit main body 1 through the diversion trench 2, and the side pressure of the drill bit main body 1 is reduced.

Further, the number of the drain pipes 1041 is two, the two drain pipes 1041 are symmetrically arranged at the bottom of the water inlet pipe 104, the drain pipes 1041 are embedded in the drill bit body 1, and cold water in the water inlet pipe 104 can be uniformly discharged to the outer side of the drill bit body 1 through the drain pipes 1041, so that the temperature of the drill bit body 1 is reduced.

Further, constant head tank 5 includes the rack gear 7 of constant head tank 5 outer wall, and the internal diameter size of constant head tank 5 equals the external diameter size of rack gear 7, and constant head tank 5 imbeds on installation pole 9, can conveniently install drill bit main part 1 on the rig fast through constant head tank 5.

Further, the drill point 3 includes diamond 301 of drill point 3 bottom, and the top external diameter of drill point 3 equals the external diameter of drill bit main part 1 bottom, and drill point 3 passes through bolt 303 and drill bit main part 1 fixed connection, and drill point 3 can carry out the installation of self, dismantlement work through bolt 303 fast to improve the convenience of changing drill point 3.

Further, the spring 105 is located between the drill bit body 1 and the drill tip 3, the spring 105 is uniformly arranged at the bottom of the drill bit body 1, the spring 105 is fixedly connected with the drill bit body 1, and the spring 105 is compressed by stress and can buffer the pressure applied to the drill tip 3, so that the pressure applied to the drill bit body 1 can be reduced.

Further, the diamonds 301 are uniformly distributed at the bottom of the drill tip 3, the diamonds 301 are uniformly arranged to form a circle center, the diamonds 301 are fixedly connected with the drill tip 3, and the diamonds 301 can enhance the drilling capability of the drill bit and reduce the abrasion rate of the drill tip 3 through the characteristic of high strength.

The utility model provides a pair of PDC drill bit shocks resistance's theory of operation as follows:

in the process of drilling, the drill point 3 at the bottom of the drill main body 1 is firstly stressed by the pressure of the drilling surface to push the connecting rod 302 at the top to move towards the inner side of the mounting groove 106, in the process, the spring 105 at the bottom of the drill main body 1 is also stressed and compressed to buffer the pressure on the drill point 3, so that the pressure on the drill main body 1 is reduced, the wear-resistant layer 101 is arranged at the outer side of the drill main body 1, the hardness of the wear-resistant layer 101 is higher, the wear-resistant performance is stronger, the wear rate of the drill main body 1 can be effectively reduced, meanwhile, the wear-resistant layer 101 can rapidly guide the soil and the gravels generated in the drilling process to the top of the drill main body 1 through the diversion grooves 2 on the surface, the side pressure on the drill main body 1 is reduced, the reinforcing ribs 103 are arranged inside the drill main body 1, and the toughness and the bearing capacity of the reinforcing ribs 103 are stronger, the pressure, the probability that the drill bit body 1 is broken is favorably reduced, when the drill bit works normally, the drill bit body 1 can have violent friction with a drilling surface, a large amount of heat is generated, water can be filled into the water inlet hole 6 at the top of the mounting rod 9 through an external connecting pipeline, external cold water is made to sequentially pass through the water inlet pipe 104 and the water outlet pipe 1041 inside the drill bit body 1 and is discharged to the outer side of the drill bit body 1, the discharged cold water can quickly reduce the high temperature generated by the violent friction of the drill bit body 1, meanwhile, the surface of the drill bit body 1 can be lubricated, and the friction force received by the surface of the drill bit body.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims (7)

1. An impact resistant PDC drill bit, comprising a bit body (1), characterized in that: the drill bit comprises a drill bit body (1), wherein the top of the drill bit body (1) is fixedly provided with a rubber cushion (8) and an installation rod (9) respectively, the front of the installation rod (9) is embedded with a bolt (4), the outer wall of the installation rod (9) is embedded with a positioning groove (5), the outer wall of the positioning groove (5) is fixedly provided with a gear strip (7), the top of the installation rod (9) is embedded with a water inlet hole (6), the outer wall of the drill bit body (1) is embedded with a diversion groove (2), the bottom of the drill bit body (1) is fixedly provided with a drill point (3), a buffer spring (105) and a mounting groove (106) respectively, the inside of the drill bit body (1) is embedded with a wear-resistant layer (101), a heat-insulating layer (102) and a reinforcing rib (103) respectively, the inside of the reinforcing rib (103) is embedded with a water inlet, the inside swing joint of mounting groove (106) has connecting rod (302), the fixed cotton packing (1061) that is provided with of inner wall of mounting groove (106), the fixed diamond (301) that is provided with in bottom of drill point (3), the inside of drill point (3) is run through there is bolt (303).

2. An impact-resistant PDC drill bit according to claim 1, wherein the guide grooves (2) are entirely 'spiral', the inner diameter of the guide grooves (2) is equal to the outer diameter of the drill bit body (1), and the guide grooves (2) are embedded in the outer wall of the drill bit body (1).

3. An impact-resistant PDC drill bit according to claim 1, wherein the drain pipe (1041) is provided in two, the two drain pipes (1041) are symmetrically arranged at the bottom of the water inlet pipe (104), and the drain pipes (1041) are embedded in the drill bit body (1).

4. An impact-resistant PDC drill bit according to claim 1, wherein the positioning slot (5) comprises a rack (7) of outer walls of the positioning slot (5), an inner diameter dimension of the positioning slot (5) being equal to an outer diameter dimension of the rack (7), the positioning slot (5) being embedded in the mounting rod (9).

5. An impact-resistant PDC drill bit according to claim 1, characterized in that the drill tip (3) comprises diamonds (301) at the bottom of the drill tip (3), the outer diameter of the top of the drill tip (3) is equal to the outer diameter of the bottom of the drill bit body (1), and the drill tip (3) is fixedly connected with the drill bit body (1) through bolts (303).

6. An impact-resistant PDC drill bit according to claim 1, wherein the spring (105) is located at a position between the bit body (1) and the drill tip (3), the spring (105) uniformly arranges the bottom of the bit body (1), and the spring (105) is fixedly connected with the bit body (1).

7. An impact-resistant PDC drill bit as claimed in claim 1, characterized in that the diamonds (301) are evenly distributed at the bottom of the drill tip (3), the diamonds (301) are evenly arranged in a "circle center", and the diamonds (301) are fixedly connected with the drill tip (3).

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