Well filling and plug drilling integrated drill bit

Abstract

The utility model discloses a well filling and drilling plug integrated drill bit which comprises a drill bit body. The blades are arranged on the drill bit body, cutting teeth are arranged on the blades, and rear row teeth and gauge protection teeth are arranged on the lower portions of the blades. Three drill bit water holes are formed in the position, close to the crown, of the drill bit body, and the inner diameter of each drill bit water hole ranges from 30 mm to 40 mm. And a flow channel extends from the crown part of the drill bit body to the lower part of the drill bit body at the position where the drill bit body is matched with the corresponding drill bit water hole. According to the integrated drill bit, the drilling efficiency can be effectively improved, the borehole size is optimized, the operation cost is reduced, the operation safety is improved, and the integrated drill bit is more suitable for complex stratums.

Description

Technical Field

[0001] The utility model relates to the technical field of well drilling, in particular to a well filling and drilling plug integrated drill bit. Background Art

[0002] At present, in the oil drilling industry, there is a breathing effect after well leakage, and the plugging agent is discharged or mixed. If the plugging effect is not good, the number of plugging or well filling will increase, resulting in multiple drilling trips. Therefore, plugging operations must be carried out frequently.

[0003] At present, conventional plugging operations use roller drill bits. After the plugging operation is completed, the drill needs to be pulled out and replaced with a PDC drill bit for drilling. Frequent pulling out and drilling seriously restricts the drilling cycle.

[0004] During the drilling process, leakage and blockage are common problems, which not only affect drilling efficiency, but also pose a threat to the working environment and personnel safety.

[0005] Therefore, based on the above technical problems, technicians in this field urgently need to develop an integrated drill bit for well filling and drilling. Utility Model Content

[0006] The purpose of the utility model is to provide a well filling drill plug integrated drill bit, which realizes the design requirements of high efficiency, safety and integration of drilling operations, and can bring higher efficiency, better safety and longer service life to drilling operations.

[0007] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0008] The utility model discloses a well filling and drilling plug integrated drill bit, which comprises:

[0009] a drill bit body; and

[0010] A plurality of blades are arranged on the drill body, wherein the blades are provided with cutting teeth, and the lower portion of the blades is provided with rear row teeth and gauge teeth;

[0011] The drill body has three drill water holes near the crown, and the inner diameter of the drill water holes ranges from 30mm to 40mm;

[0012] A flow channel extends from the crown of the drill bit body to the lower part of the drill bit body at the position where the drill bit body cooperates with the corresponding drill bit water hole.

[0013] Furthermore, the blade is divided into a blade upper structure located on the upper part of the drill body and a gauge portion formed on the lower part of the blade upper structure;

[0014] The blade upper structure is divided into a crown, an outer cone and an inner cone, and the side surface of the blade upper structure is provided with cutting teeth, and the cutting teeth are plane teeth;

[0015] The side surface of the gauge maintaining portion is provided with rear row teeth, and the surface of the gauge maintaining portion is provided with gauge maintaining teeth.

[0016] Furthermore, the arrangement angle of the cutting teeth is 13°-16.5°.

[0017] Furthermore, there is a height difference between the cutting teeth and the rear row teeth, and the rear row teeth are arranged at a height 1.5 mm higher than the cutting teeth.

[0018] Furthermore, the cutting teeth are made of 1613 composite sheets; the rear row teeth and gauge teeth are made of 1308 composite sheets.

[0019] Furthermore, the drill body is made of 4145H alloy steel.

[0020] In the above technical solution, the utility model provides a well filling and drilling plug integrated drill bit, which has the following beneficial effects:

[0021] The integrated drill bit of the utility model can effectively improve drilling efficiency, optimize wellbore size, reduce operation costs, and improve operation safety. The integrated drill bit is more suitable for complex formations. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 This is a structural schematic diagram of a well filling and drilling plug integrated drill bit disclosed in an embodiment of the present application.

[0024] Description of reference numerals:

[0025] 1. Drill bit body; 2. Blade;

[0026] 201. Outer cone part; 202. Inner cone part; 203. Diameter protecting part;

[0027] 301, cutting teeth; 302, rear teeth; 303, gauge teeth;

[0028] 401. Drill bit water hole; 402. Flow channel. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] See also Figure 1 As shown;

[0031] This embodiment discloses a well filling drill plug integrated drill bit, the integrated drill bit comprising:

[0032] Drill bit body 1; and

[0033] A plurality of blades 2 are arranged on the drill body 1, wherein the blades 2 are provided with cutting teeth 301, and the lower portion of the blades 2 is provided with rear teeth 302 and gauge teeth 303;

[0034] The drill body 1 has three drill water holes 401 near the crown, and the inner diameter of the drill water holes 401 ranges from 30mm to 40mm.

[0035] A flow channel 402 extends from the crown of the drill bit body 1 to the lower part of the drill bit body 1 at the position where the drill bit body 1 cooperates with the corresponding drill bit water hole 401 .

[0036] Specifically, this embodiment discloses an integrated drill bit for well filling and plugging. In drilling operations, well filling and plugging are two important links. Traditional well filling and plugging operations often require the use of different equipment and tools, which not only increases operation time and cost, but may also affect operation efficiency and quality. Therefore, this embodiment discloses an integrated drill bit that simultaneously realizes the functions of well filling and plugging. The drill bit of this embodiment includes a drill bit body 1 and a plurality of blades 2, wherein the blades 2 are provided with a plurality of cutting teeth 301 and a rear row of teeth 302. In order to improve the efficiency of well filling and plugging, this embodiment optimizes the drill bit water hole 401, adopts an ultra-large inner diameter design, optimizes the water hole angle, and improves the strength of the inner wall of the water hole. In addition, the width of the traditional flow channel is widened by 25 mm, and the processing chamber improves the smoothness of the flow channel 402 to maximize the efficiency of returning cuttings.

[0037] Preferably, the blade wing 2 of this embodiment is divided into a blade wing upper structure located on the upper part of the drill bit body 1 and a gauge portion 203 formed at the lower part of the blade wing upper structure; wherein the blade wing upper structure is divided into a crown portion, an outer cone portion 201 and an inner cone portion 202, and a cutting tooth 301 is provided on the side surface of the blade wing upper structure, and the cutting tooth 301 is a flat tooth;

[0038] The side surface of the gauge-keeping portion 203 is provided with rear-row teeth 302 , and the surface of the gauge-keeping portion 203 is provided with gauge-keeping teeth 303 .

[0039] During design, the cutting teeth 301 of this embodiment are arranged at an angle of 13°-16.5°. The cutting teeth 301 of this embodiment utilize flat teeth, and the angle of the cutting teeth 301 is optimized, adjusting the angle to 13°-16.5°. Furthermore, rear-row teeth 302 are added. Specifically, there is a height difference between the cutting teeth 301 and the rear-row teeth 302, with the rear-row teeth 302 arranged 1.5mm higher than the cutting teeth 301. This increases the drill bit's abrasion resistance and prolongs its service life.

[0040] Preferably, the cutting teeth 301 of this embodiment adopt 1613 composite sheets; the rear teeth 302 and the gauge teeth 303 adopt 1308 composite sheets.

[0041] Preferably, the drill bit body 1 of this embodiment is made of 4145H alloy steel. The use of reinforced 4145H alloy steel increases the strength of the drill bit by 7% compared to ordinary PDC drill bits.

[0042] Drilling and plugging take into account the mud backflow suction test, and simulate the water power test through a transparent mold. During the pump stop and lifting period, cement slurry and other media will not flow back into the water eye and will not produce a suction effect.

[0043] The inner cone 202 of this embodiment uses a high-density tooth arrangement to prevent the occurrence of core-cutting when drilling into abrasive formations. The crown and outer cone 201 use a medium tooth density to ensure the mechanical penetration rate while maximizing the service life of the drill bit.

[0044] The integrated drill bit of this embodiment effectively improves drilling efficiency. In the traditional drilling process, the drill bit and the drill plug often need to be operated separately, which not only increases the cost but also increases the operation time. The integrated drill bit of this embodiment can complete the tasks of the drill bit and the drill plug at the same time during the drilling process, thereby greatly improving the drilling efficiency.

[0045] The integrated drill bit of this embodiment optimizes the wellbore quality, can effectively cut rock, and reduces burrs and irregular shapes in the wellbore, thereby optimizing the wellbore quality, which helps to improve the quality and efficiency of subsequent operations such as casing running and cementing.

[0046] The integrated drill bit of this embodiment reduces operating costs by reducing the number of times the drill bit and drilling tools need to be replaced, and reducing labor and equipment costs. At the same time, since the number of operating steps and tools is reduced, the difficulty of maintenance and management is also reduced, further reducing overall operating costs.

[0047] The integrated drill bit of this embodiment improves operational safety. It adapts to multiple leak plugging working conditions and surrounding environments, and can promptly detect and address potential safety hazards, thereby helping to reduce operational risks and improve operational safety.

[0048] The integrated drill bit of this embodiment is adaptable to complex formations and is optimized for different types of rocks and formations. It can better meet the drilling needs of complex formations. Whether it is soft rock or hard rock, the drill bit can provide stable and efficient drilling performance.

[0049] In the above technical solution, the utility model provides a well filling and drilling plug integrated drill bit, which has the following beneficial effects:

[0050] The integrated drill bit of the utility model can effectively improve drilling efficiency, optimize wellbore size, reduce operation costs, and improve operation safety. The integrated drill bit is more suitable for complex formations.

[0051] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A well filling and drilling plug integrated drill bit, characterized in that: The integrated drill bit includes: a drill bit body (1); and A plurality of blades (2) are arranged on the drill body (1), wherein the blades (2) are provided with cutting teeth (301), and the lower portion of the blades (2) is provided with rear row teeth (302) and gauge teeth (303); The drill bit body (1) has three drill bit water holes (401) near the crown, and the inner diameter of the drill bit water holes (401) ranges from 30 mm to 40 mm; A flow channel (402) extends from the crown of the drill bit body (1) to the lower part of the drill bit body (1) at a position where the drill bit body (1) cooperates with the corresponding drill bit water hole (401).

2. The well filling and drilling plug integrated drill bit according to claim 1, characterized in that: The blade (2) is divided into a blade upper structure located on the upper part of the drill body (1) and a gauge portion (203) formed on the lower part of the blade upper structure; The blade upper structure is divided into a crown, an outer cone (201) and an inner cone (202), and a side surface of the blade upper structure is provided with cutting teeth (301), and the cutting teeth (301) are plane teeth; The side surface of the gauge-keeping portion (203) is provided with rear-row teeth (302), and the surface of the gauge-keeping portion (203) is provided with gauge-keeping teeth (303).

3. The well filling and drilling plug integrated drill bit according to claim 2, characterized in that: The arrangement angle of the cutting teeth (301) is 13°-16.5°.

4. The well filling and drilling plug integrated drill bit according to claim 2, characterized in that: The cutting teeth (301) and the rear row teeth (302) have a height difference, and the rear row teeth (302) are arranged at a height 1.5 mm higher than the cutting teeth (301).

5. The well filling and drilling plug integrated drill bit according to claim 2, characterized in that: The cutting teeth (301) are made of 1613 composite sheets; the rear row teeth (302) and the gauge teeth (303) are made of 1308 composite sheets.

6. The well filling and drilling plug integrated drill bit according to claim 1, characterized in that: The drill bit body (1) is made of 4145H alloy steel.

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