Petroleum drill bit with automatic cooling function

Abstract

The utility model discloses a petroleum drill bit with an automatic cooling function, which comprises a drill bit main body, a plurality of broken stone matrixes and a plurality of cooling devices, wherein a plurality of broken stone matrixes are arrayed on the circumference of the bottom of the drill bit main body; the drill rod is connected with the drill bit main body; wherein the drill bit body is internally provided with a movable cavity, the movable cavity is internally provided with a second gear, and the second gear is driven by a driven driving mechanism; and a plurality of water injection channels communicated with the movable cavity are arrayed in the drill bit main body in the circumferential direction of the drill bit main body. According to the device, the rotatable rotary spray head can evenly spray cooling liquid to the bottom and the peripheral area of the drill bit body in the rotating process of the drill bit, local overheating is avoided, the temperature of all parts of the drill bit is kept relatively balanced, the abrasion and damage risks caused by high temperature of the drill bit are effectively reduced, and the service life of the drill bit is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of petroleum drill bit, and particularly relates to a petroleum drill bit with automatic cooling function. BACKGROUND

[0002] Petroleum drilling needs drill bit to break rock quickly and efficiently under various complex formation conditions to form a borehole. With petroleum exploration and development advancing to deeper and more complex formations, the rock breaking efficiency of drill bits is required to be higher and higher. Drill bits generate a large amount of heat under the friction with rock at high speed rotation and high pressure. If the heat cannot be dissipated in time, the temperature of the drill bit will rise sharply, affecting the rock breaking performance. The existing cooling liquid flow structure in the drill bit cannot realize uniform spray cooling of the drill bit. Due to the non-uniform cooling, the temperature difference of each part of the drill bit is large, which generates thermal stress. If the thermal stress is concentrated in some areas, the drill bit may have cracks. With the continuous drilling, the cracks will gradually expand, seriously affecting the structural strength and service life of the drill bit. SUMMARY

[0003] Therefore, the utility model provides a petroleum drill bit with automatic cooling function to solve the problems in the background.

[0004] To achieve the above object, the utility model provides the following technical scheme: a petroleum drill bit with automatic cooling function, comprising:

[0005] a drill bit main body, the bottom circumference of which is arrayed with a plurality of rock breaking matrixes;

[0006] and a drill rod connected with the drill bit main body;

[0007] wherein, an activity cavity is arranged in the drill bit main body, a gear two is arranged in the activity cavity, and the gear two is driven by a driven driving mechanism;

[0008] a plurality of water injection channels are arrayed along the circumferential direction of the drill bit main body and communicated with the activity cavity, an inner bearing sleeve is fixedly embedded in each water injection channel, a rotating rod is installed in each inner bearing sleeve, a rotating nozzle is fixedly connected to the bottom end of each rotating rod and rotatably installed in the slot at the bottom of the drill bit main body, a gear one is fixedly installed at the top end of each rotating rod, and each gear one is in meshing transmission with the gear two.

[0009] Further, as a preferred, the drill rod is composed of an inner tube, a driving tube and an outer tube, wherein the driving tube is rotatably arranged in the annular cavity composed of the inner tube and the outer tube, and the bottom end of the driving tube is fixedly connected with the drill bit main body.

[0010] Further, as a preferred, the driven driving mechanism comprises:

[0011] A transmission shaft is rotatably arranged in the drill head body, and a bottom end of the transmission shaft is fixedly connected with the gear two;

[0012] A clamping block is arranged in the inner tube and is fixedly connected with an inner limiting ring on an inner wall of the inner tube, and the clamping block is fixedly connected with a top end of the transmission shaft.

[0013] Further, as a preferred, the transmission shaft and each of the rotating rods adopt a hollow structure, so that the transmission shaft and each of the rotating rods can be communicated through a movable cavity.

[0014] Further, as a preferred, each of the rotating rods is arranged in an inclined manner, and an inclination angle is arranged as 5-20°.

[0015] Further, as a preferred, a plurality of polycrystalline diamonds uniformly distributed are fixedly embedded on the stone crushing matrix.

[0016] Further, as a preferred, each of the rotating nozzles is located between every adjacent two stone crushing matrices, a plurality of first jet ports are circumferentially arranged on an outer ring part of each of the rotating nozzles, and a plurality of second jet ports uniformly distributed are arranged on an inner ring part of each of the rotating nozzles.

[0017] Further, as a preferred, the second jet port adopts a straight port structure, and the first jet port adopts an outwardly inclined inclined port structure.

[0018] Compared with the prior art, the above-mentioned technology has the following beneficial effects:

[0019] In the device, the driven driving mechanism indirectly drives each rotating nozzle to rotate, since the drill head body rotates with the driving tube, that is, both are relatively static, and the inner tube and the transmission shaft are always in a fixed state, so when the drill head body rotates, the transmission shaft rotates relative to the drill head body, and the gear two rotates (relative to the drill head body), thereby driving each gear one, so that the rotating rod drives the rotating nozzle to rotate relative to the drill head body. On the one hand, the rotating nozzle can make the cooling liquid fully contact with the surface of the drill head, increase the heat dissipation area and the heat dissipation efficiency, and timely take away a large amount of heat generated in the rock breaking process of the drill head, so as to prevent the performance of the drill head from being reduced due to overheating.

[0020] On the other hand, through the rotating water, a lubricating liquid film can be formed between the drill bit cutting edge and the rock, the cutting resistance is reduced, the drill bit torque is reduced, the drill bit rotation is more smooth, the energy consumption is reduced, and the rock breaking efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1It is a three-dimensional structure schematic view of a petroleum drill bit with automatic cooling function;

[0022] Figure 2 It is an internal structure schematic view of a petroleum drill bit with automatic cooling function;

[0023] Figure 3 It is Figure 2 It is an enlarged schematic view of part A in the figure;

[0024] Figure 4 It is an internal structure schematic view of a drill bit main body in a petroleum drill bit with automatic cooling function;

[0025] Figure 5 It is Figure 4 It is an enlarged schematic view of part B in the figure.

[0026] In the figure: 1, drill rod; 2, drill bit main body; 3, stone crushing matrix; 4, movable cavity; 5, transmission shaft piece; 101, inner tube; 102, driving tube; 103, outer tube; 104, inner limiting ring; 6, clamping block; 7, gear two; 8, inner bearing sleeve; 9, rotating rod; 10, gear one; 11, rotating nozzle; 12, first jet port; 13, second jet port. DETAILED DESCRIPTION

[0027] In combination with the drawings in the embodiments of the utility model, the technical scheme of the embodiments of the utility model will be described clearly and completely below.

[0028] Embodiment: please refer to the drawings of the utility model Figures 1-5 The utility model provides a technical scheme: a petroleum drill bit with automatic cooling function, which comprises:

[0029] The drill bit main body 2 has a plurality of stone crushing matrices 3 arranged in the circumferential direction at the bottom;

[0030] And the drill rod 1 is connected with the drill bit main body 2;

[0031] The drill bit main body 2 is provided with a movable cavity 4, the movable cavity 4 is provided with gear two 7, and the gear two 7 is driven by a driven driving mechanism;

[0032] The drill bit main body 2 is provided with a plurality of water injection channels communicated with the movable cavity 4 along the circumferential direction, each water injection channel is fixedly embedded with an inner bearing sleeve 8, each inner bearing sleeve 8 is installed with a rotating rod 9, the bottom end of each rotating rod 9 is fixedly connected with a rotating nozzle 11, the rotating nozzle 11 is rotatably installed in the slot at the bottom of the drill bit main body 2, the top end of each rotating rod 9 is fixedly installed with gear one 10, and each gear one 10 is engaged with gear two 7 for transmission;

[0033] Specifically, the rotatable rotating nozzle 11 can uniformly spray the cooling liquid on the bottom and the peripheral area of the drill bit body 2 during the rotation of the drill bit, avoid local overheating, keep the temperature of each part of the drill bit relatively balanced, effectively reduce the wear and damage risk of the drill bit due to high temperature, and prolong the service life of the drill bit.

[0034] In the embodiment, the drill rod 1 is composed of an inner tube 101, a driving tube 102 and an outer tube 103, wherein the driving tube 102 is rotatably arranged in the annular cavity composed of the inner tube 101 and the outer tube 103, and the bottom end of the driving tube 102 is fixedly connected with the drill bit body 2.

[0035] That is, the inner tube 101 and the outer tube 103 are in a static state, and the driving tube 102 is driven by the driving device to drive the drill bit body to rotate at a high speed.

[0036] In the embodiment, the driven driving mechanism comprises:

[0037] a transmission shaft 5 rotatably arranged in the drill bit body 2, the bottom end of the transmission shaft 5 being fixedly connected with the gear two 7;

[0038] and a clamping block 6 arranged in the inner tube 101 and fixedly connected with the inner limiting ring 104 on the inner wall of the inner tube 101, and the top end of the clamping block 6 being fixedly connected with the transmission shaft 5;

[0039] Specifically, since the drill bit body 2 rotates with the driving tube, that is, the two are relatively static, and the inner tube 101 and the transmission shaft 5 are always in a fixed state, when the drill bit body 2 rotates, the transmission shaft 5 rotates relative to the drill bit body, so the gear two 7 rotates (relative to the drill bit body), and in turn drives each gear one 10, so that the rotating rod 9 drives the rotating nozzle to rotate relative to the drill bit body. On the one hand, the rotating nozzle can make the cooling liquid fully contact with the surface of the drill bit, increase the heat dissipation area and heat dissipation efficiency, and timely take away a large amount of heat generated in the rock breaking process of the drill bit, so as to prevent the performance of the drill bit from being reduced due to overheating.

[0040] On the other hand, by rotating the water, a lubricating liquid film can be formed between the drill bit cutting edge and the rock, the cutting resistance is reduced, the torque of the drill bit is reduced, the rotation of the drill bit is smoother, the energy consumption is reduced, and the rock breaking efficiency is improved.

[0041] In the embodiment, the transmission shaft 5 and each rotating rod 9 adopt a hollow structure, so that the transmission shaft 5 and each rotating rod 9 can be communicated through the movable cavity 4.

[0042] In the embodiment, each rotating rod 9 is arranged obliquely, and the inclination angle is set to 5-20°.

[0043] In the embodiment, a plurality of polycrystalline diamonds uniformly distributed are fixedly embedded on the stone matrix 3.

[0044] In the embodiment, each rotating nozzle 11 is located between every two adjacent stone matrixes 3, and the outer ring part of each rotating nozzle 11 is circumferentially arranged with a plurality of first jet ports 12, and the inner ring part of each rotating nozzle 11 is provided with a plurality of uniformly distributed second jet ports 13.

[0045] In the embodiment, the second jet port 13 adopts a straight port structure, and the first jet port 12 adopts an outwardly inclined inclined port structure, so as to increase the spraying range of the rotating nozzle and improve the contact rate of the cooling liquid with the surface of the drill bit.

[0046] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An oil drill bit with an automatic cooling function, characterized in that, It includes: The drill bit body (2) has a plurality of rock breaking matrixes (3) in the bottom circumferential array; And the drill rod (1) is connected with the drill bit body (2); Wherein, the movable cavity (4) is arranged in the drill bit body (2), the gear two (7) is arranged in the movable cavity (4), and the gear two (7) is driven by the driven driving mechanism; The drill bit body (2) has a plurality of water injection channels which are communicated with the movable cavity (4) and are arranged along the circumferential direction, each inner bearing sleeve (8) is fixedly embedded in each water injection channel, each rotating rod (9) is installed in each inner bearing sleeve (8), the bottom end of each rotating rod (9) is fixedly connected with the rotating nozzle (11), the rotating nozzle (11) is rotatably installed in the slot at the bottom of the drill bit body (2), the top end of each rotating rod (9) is fixedly installed with the gear one (10), and each gear one (10) is engaged with the gear two (7).

2. The oil drill bit having an automatic cooling function according to claim 1, wherein: The drill rod (1) is composed of an inner tube (101), a driving tube (102) and an outer tube (103), wherein the driving tube (102) is rotatably arranged in the annular cavity formed by the inner tube (101) and the outer tube (103), and the bottom end of the driving tube (102) is fixedly connected with the drill bit body (2).

3. The oil drill bit having an automatic cooling function according to claim 2, wherein: The driven driving mechanism includes: The transmission shaft (5) is rotatably arranged in the drill bit body (2), the bottom end of the transmission shaft (5) is fixedly connected with the gear two (7); And the clamping block (6) is arranged in the inner tube (101) and fixedly connected with the inner limiting ring (104) on the inner wall of the inner tube (101), and the clamping block (6) is fixedly connected with the top end of the transmission shaft (5).

4. The oil drill bit having an automatic cooling function according to claim 3, wherein: The transmission shaft (5) and each rotating rod (9) adopt a hollow structure, so that the transmission shaft (5) and each rotating rod (9) can be communicated through the movable cavity (4).

5. The petroleum drill bit having an automatic cooling function according to claim 1, wherein: Each rotating rod (9) is arranged obliquely, and the inclination angle is 5-20°.

6. The oil drill bit having an automatic cooling function according to claim 1, wherein: A plurality of uniformly distributed polycrystalline diamonds are fixedly embedded on the rock breaking matrix (3).

7. The petroleum drill bit having an automatic cooling function according to claim 1, wherein: Each rotating nozzle (11) is located between every two adjacent rock breaking matrixes (3), a plurality of first jet ports (12) are arranged in the circumferential array of the outer ring part of each rotating nozzle (11), and a plurality of uniformly distributed second jet ports (13) are arranged in the inner ring part of each rotating nozzle (11).

8. The oil drill bit having an automatic cooling function according to claim 7, wherein: The second jet port (13) adopts a straight port structure, and the first jet port (12) adopts an outwardly inclined inclined port structure.

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