Crawler-type anti-jamming PDC (polycrystalline diamond compact) bit

Abstract

The utility model discloses a crawler-type anti-jamming PDC drill bit which comprises a drill bit body, a crawler mechanism and PDC teeth, and the PDC teeth and the crawler mechanism are arranged on the drill bit body. The crawler belt mechanism comprises a plurality of crawler belt buckles, first crushing teeth, second crushing teeth, a one-way bearing and crawler belt wheels, the first crushing teeth and the second crushing teeth are arranged on the crawler belt buckles, the crawler belt buckles are connected with one another to form a closed loop, and the closed loop is arranged on the one-way bearing and the crawler belt wheels. The first crushing teeth and the second crushing teeth are arranged on the crawler belt buckles, the crawler belt buckles are connected with one another to form a closed loop, and the closed loop is arranged on the one-way bearing and the crawler wheel, so that the crawler belt mechanism can rotate only in the direction deviating from the drilling direction of the PDC drill bit and cannot rotate in the drilling direction. When rock debris blocks flow back along with drilling fluid, the rock debris blocks collide and impact with the first crushing teeth and the second crushing teeth, the generated impact force can serve as a power source for rotation of the crawler mechanism, and the first crushing teeth and the second crushing teeth can conduct secondary crushing on the rock debris blocks.

Description

Technical Field

[0001] This utility model belongs to the field of oil and gas drilling engineering, mining engineering or geological drilling technology, and specifically relates to a tracked anti-sticking PDC drill bit method. Background Technology

[0002] PDC drill bits are widely used in drilling engineering fields such as oil and gas exploration, coal, and agriculture. They mainly rely on composite plates to scrape and break rocks in the formation, and have been well promoted and applied in drilling soft to medium-hard formations.

[0003] However, PDC drill bits have particularly significant drawbacks when drilling into complex formations with alternating soft and hard rock. During rock breaking, the cutting teeth on the PDC drill bit inevitably wear due to the reaction force of the rock. However, the wear varies in different parts of the drill bit. The cutting teeth on the cutter wing crown and the outer cone are often the most severely worn, while the wear on the inner cone cutting teeth is almost negligible. This results in the inner cone teeth not being fully and effectively utilized, thus shortening the service life of the drill bit.

[0004] To improve drill bit life and ensure effective utilization of all cutting teeth, a tracked, wear-prone PDC drill bit with cyclic cutting function is proposed.

[0005] Chinese Patent Publication No. CN112761532A discloses a crawler-type wear-resistant PDC drill bit with cyclic cutting function, mainly composed of a drill bit base, a drill bit body, a crawler drive structure, and a dustproof plate. The drill bit body consists of a cutter blade base, a crawler wheel mounting component, a support shaft, and a drainage pipe. The crawler wheel mounting component consists of a crawler wheel axle and a baffle plate, and the crawler wheel mounting components are welded to the cutter blade base in an elliptical arrangement, with a number of m, where m>3. The crawler drive structure consists of cutting teeth, a track, a crawler wheel, and a pin shaft. The track consists of a rectangular plate and a long pin. The drill bit is composed of a shaft hole, a hollow thin plate, a short pin shaft hole, a V-belt, a rectangular block, a U-shaped groove, and an inclined thin plate. The track wheel is composed of a cylinder, a through hole, and a V-belt groove. The cutter blade base is an L-shaped hollow thick-walled structure, with n cutter blade bases arranged in a circular shape on the drill bit base, where n>3. The track drive structure consists of p tracks, q track wheels, and k pin shafts, where q>3, p>q, and k>p. The drill bit base is welded to the drill bit base, and the track drive structure is connected to the drill bit base through the shaft hole. A dustproof plate is welded to the support shaft of the drill bit base to prevent large pieces of rock cuttings from entering the interior of the track drive structure. However, the PDC drill bit in this patent has poor crushing performance and cannot effectively solve the problem of drill bit jamming in complex formations. Utility Model Content

[0006] The purpose of this invention is to solve the problems of existing technology and provide a tracked anti-sticking PDC drill bit. The track buckles are equipped with first and second breaking teeth, and several track buckles are interconnected to form a closed loop. This closed loop is mounted on a one-way bearing and a track wheel, ensuring that the track mechanism can only rotate in the direction away from the drilling direction of the PDC drill bit, and cannot rotate in the drilling direction. When rock cuttings are flushed back with the drilling fluid, the rock cuttings collide with the first and second breaking teeth. The resulting impact force serves as the power source for the rotation of the track mechanism, driving the track wheel to rotate unidirectionally. The first and second breaking teeth can then perform secondary crushing of the rock cuttings. Because the one-way bearing rotates in one direction, large rock cuttings fall back and collide with the track mechanism under the turbulent effect of drilling fluid, increasing the impact force of the fall and further breaking up the rock cuttings. Since the track wheel mechanism extends almost to the bottom of the drill bit body flow channel, it can also repeatedly break up the rock cuttings in the flow channel during the rotation of the drill bit, so that the broken rock cuttings are easier to return to the surface. This can effectively solve the problem of drill bit stuck in complex formations.

[0007] This utility model is achieved through the following technical solution:

[0008] A tracked anti-jamming PDC drill bit includes a drill bit body, a track mechanism, and PDC teeth. The PDC teeth and the track mechanism are disposed on the drill bit body. The track mechanism includes a plurality of track buckles, a first breaking tooth, a second breaking tooth, a one-way bearing, and a track wheel. The first breaking tooth and the second breaking tooth are disposed on the track buckles. The plurality of track buckles are connected to each other to form a closed loop, and the closed loop is disposed on the one-way bearing and the track wheel.

[0009] Preferably, the drill bit body is provided with several blades, a male tapered thread for connecting to the lower power connector, and a first nozzle.

[0010] Preferably, the drill bit body is provided with a track groove, and at least one second nozzle and bearing groove are provided on the track groove along the axial direction of the drill bit body.

[0011] Preferably, the angle between the axial direction of the second nozzle and the radial direction of the drill bit body is α, where 0° < α ≤ 20°.

[0012] Preferably, the track buckle is provided with a first breaking tooth hole, a second breaking tooth hole, a first pin hole, and a second pin hole.

[0013] Preferably, the first crushing tooth includes a main crushing tooth and a tooth ridge, and the first crushing tooth is fixedly installed in the first crushing tooth hole.

[0014] Preferably, the second crushing tooth is fixedly installed inside the second crushing tooth hole.

[0015] Preferably, the track buckles are connected in series to form a closed loop via pins, a first pin hole, and a second pin hole; the track wheel meshes with the tooth ridge and rotates; and the track mechanism is installed in the bearing slot via a one-way bearing.

[0016] Preferably, the main crushing tooth is a conical tooth or a spherical tooth.

[0017] Preferably, the second breaking tooth is a conical tooth or a spherical tooth.

[0018] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0019] This utility model provides a tracked anti-sticking PDC drill bit. The track buckles are equipped with first and second breaking teeth, and several track buckles are interconnected to form a closed loop. This closed loop is located on a one-way bearing and a track wheel, ensuring that the track mechanism can only rotate in the direction away from the drilling direction of the PDC drill bit, and cannot rotate in the drilling direction. When cuttings are flushed back with the drilling fluid, the cuttings collide with the first and second breaking teeth. The resulting impact force serves as the power source for the rotation of the track mechanism, driving the track wheel to rotate unidirectionally. The first and second breaking teeth can further break the cuttings. Because the one-way bearing rotates unidirectionally, large cuttings fall back and, under the turbulent effect of the drilling fluid, collide with the track mechanism, increasing the impact force and further breaking the cuttings. Since the track wheel mechanism extends almost to the bottom of the drill bit's flow channel, it can repeatedly break the cuttings within the flow channel during drill bit rotation, making it easier for the broken cuttings to be flushed back to the surface. This effectively solves the problem of stuck drill bits in complex formations. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the drill bit body in this utility model;

[0022] Figure 3 This is a full cross-sectional view of the drill bit body in this utility model;

[0023] Figure 4 This is a schematic diagram of the track mechanism in this utility model;

[0024] Figure 5 This is a schematic diagram of the track buckle structure in this utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the first crushing tooth in this utility model;

[0026] Wherein: 310, drill bit body; 311, cutter wing; 312, drill bit male tapered thread; 313, first nozzle; 314, track groove; 3141, second nozzle; 3142, bearing groove; 320, track mechanism; 321, track buckle; 3211, first crushing tooth hole; 3212, second crushing tooth hole; 3213, first pin hole; 3214, second pin hole; 322, first crushing tooth; 3221, main crushing tooth; 3222, wheel tooth ridge; 323, second crushing tooth; 324, one-way bearing; 325, track wheel; 330, PDC tooth. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the embodiments, but the implementation of the present invention is not limited thereto.

[0028] Example 1

[0029] like Figures 1-6 As shown, this embodiment provides a tracked anti-jamming PDC drill bit, including a drill bit body 310, a track mechanism 320, and PDC teeth 330. The PDC teeth 330 and the track mechanism 320 are disposed on the drill bit body 310. The track mechanism 320 includes a plurality of track buckles 321, a first breaking tooth 322, a second breaking tooth 323, a one-way bearing 324, and a track wheel 325. The first breaking tooth 322 and the second breaking tooth 323 are disposed on the track buckles 321. The plurality of track buckles 321 are connected to each other to form a closed loop, and the closed loop is disposed on the one-way bearing 324 and the track wheel 325.

[0030] Example 2

[0031] like Figures 1-6 As shown, this embodiment provides a tracked anti-jamming PDC drill bit, including a drill bit body 310, a track mechanism 320, and PDC teeth 330. The PDC teeth 330 and the track mechanism 320 are disposed on the drill bit body 310. The track mechanism 320 includes a plurality of track buckles 321, a first breaking tooth 322, a second breaking tooth 323, a one-way bearing 324, and a track wheel 325. The first breaking tooth 322 and the second breaking tooth 323 are disposed on the track buckles 321. The plurality of track buckles 321 are connected to each other to form a closed loop, and the closed loop is disposed on the one-way bearing 324 and the track wheel 325.

[0032] The drill bit body 310 is provided with several blades 311, a male tapered drill bit thread 312 connected to the lower power connector, and a first nozzle 313.

[0033] The drill bit body 310 is provided with a track groove 314, and at least one second nozzle 3141 and a bearing groove 3142 are provided on the track groove 314 along the axial direction of the drill bit body 310.

[0034] The angle between the axial direction of the second nozzle 3141 and the radial direction of the drill bit body 310 is α, where 0° < α ≤ 20°.

[0035] The track buckle 321 is provided with a first breaking tooth hole 3211, a second breaking tooth hole 3212, a first pin hole 3213 and a second pin hole 3214.

[0036] The first crushing tooth 322 includes a main crushing tooth 3221 and a tooth ridge 3222, and the first crushing tooth 322 is fixedly installed in the first crushing tooth hole 3211.

[0037] The second crushing tooth 323 is fixedly installed inside the second crushing tooth hole 3212.

[0038] The track buckles 321 are connected in series to form a closed loop via pins, first pin holes 3213 and second pin holes 3214. The track wheel 325 meshes with the tooth ridge 3222 and rotates. The track mechanism 320 is installed in the bearing slot 3142 via a one-way bearing 324.

[0039] The main crushing tooth 3221 is a conical tooth or a spherical tooth.

[0040] The second breaking tooth 323 is a conical tooth or a spherical tooth.

[0041] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0042] I. This utility model provides a tracked anti-sticking PDC drill bit. The track buckle 321 is equipped with a first breaking tooth 322 and a second breaking tooth 323. Several track buckles 321 are interconnected to form a closed loop, which is mounted on a one-way bearing 324 and a track wheel 325. This ensures that the track mechanism 320 can only rotate in the direction away from the drilling direction of the PDC drill bit, and cannot rotate in the drilling direction. When cuttings are flushed back with drilling fluid, the cuttings collide with the first breaking tooth 322 and the second breaking tooth 323. The resulting impact force serves as the power source for the rotation of the track mechanism 320, driving the track wheel 325 to rotate unidirectionally. The first breaking tooth 322 and the second breaking tooth 323 can then perform secondary crushing of the cuttings. Since the one-way bearing 324 rotates in one direction, large rock cuttings fall back and collide with the track mechanism 320 under the effect of drilling fluid turbulence, increasing the impact force of the fall and further breaking up the rock cuttings. Since the track wheel mechanism 325 extends almost to the bottom of the flow channel of the drill bit body 310, it can repeatedly break up the rock cuttings in the flow channel during the rotation of the drill bit, so that the broken rock cuttings are easier to return to the surface.

[0043] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A tracked anti-jamming PDC drill bit, characterized in that: The drill bit body (310), track mechanism (320) and PDC tooth (330) are provided on the drill bit body (310). The track mechanism (320) includes a plurality of track buckles (321), a first breaking tooth (322), a second breaking tooth (323), a one-way bearing (324) and a track wheel (325). The first breaking tooth (322) and the second breaking tooth (323) are provided on the track buckles (321). The plurality of track buckles (321) are connected to each other to form a closed loop, and the closed loop is provided on the one-way bearing (324) and the track wheel (325).

2. The drag bit of claim 1, wherein: The drill bit body (310) is provided with several blades (311), a drill bit male tapered thread (312) connected to the lower power connector (230), and a first nozzle (313).

3. A tracked anti-jamming PDC drill bit according to claim 2, characterized in that: The drill bit body (310) is provided with a track groove (314), and at least one second nozzle (3141) and a bearing groove (3142) are provided on the track groove (314) along the axial direction of the drill bit body (310).

4. The drag bit of claim 3, wherein: The angle between the axial direction of the second nozzle (3141) and the radial direction of the drill bit body (310) is α, where 0° < α ≤ 20°.

5. The drag bit of claim 4, wherein: The track buckle (321) is provided with a first breaking tooth hole (3211), a second breaking tooth hole (3212), a first pin hole (3213), and a second pin hole (3214).

6. A tracked anti-jamming PDC drill bit according to claim 5, characterized in that: The first crushing tooth (322) includes a main crushing tooth (3221) and a tooth ridge (3222), and the first crushing tooth (322) is fixedly installed in the first crushing tooth hole (3211).

7. A drag bit PDC drill bit according to claim 6, wherein: The second crushing tooth (323) is fixedly installed in the second crushing tooth hole (3212).

8. A tracked anti-jamming PDC drill bit according to claim 7, characterized in that: The track buckles (321) are connected in series to form a closed loop through pins, a first pin hole (3213) and a second pin hole (3214). The track wheel (325) meshes with the tooth ridge (3222) and rotates. The track mechanism (320) is installed in the bearing slot (3142) through a one-way bearing (324).

9. A tracked anti-jamming PDC drill bit according to claim 8, characterized in that: The main crushing tooth (3221) is a conical tooth or a spherical tooth.

10. A tracked anti-jamming PDC drill bit according to claim 9, characterized in that: The second breaking tooth (323) is a conical tooth or a spherical tooth.

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