Gauge protection section shackle type ultra-short PDC (Polycrystalline Diamond Compact) drill bit

Abstract

The utility model relates to the technical field of gasoline drilling and production, in particular to a gauge protection section shackle type ultra-short PDC drill bit which comprises a drill bit body, common gauge protection sections, shackle gauge protection sections, gauge protection teeth, a cutting assembly and an ultra-short connector, a plurality of common gauge protection sections and two shackle gauge protection sections are fixedly arranged on the outer side of the drill bit body, and the two shackle gauge protection sections are symmetrically installed. Gauge protection teeth are arranged on the common gauge protection sections and the shackle gauge protection sections, a cutting assembly is arranged on the drill bit body and corresponds to the common gauge protection sections and the two shackle gauge protection sections in position, the ultra-short connector is fixedly connected with the drill bit body and located at the bottom of the drill bit body, and shackle grooves are designed in the gauge protection faces of the shackle gauge protection sections. Therefore, a shackle groove is removed at the short joint position, the drill bit is installed through the ultra-short joint, the conventional regulation that the shackle groove needs to be formed is met, and the effect that well track guiding is more accurate can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of gasoline drilling technology, and in particular to an ultra-short PDC drill bit with a diameter-preserving section uncoupling method. Background Technology

[0002] PDC drill bits are designed for precise wellbore trajectory guidance, ensuring normal drilling and assembly / disassembly under existing drilling engineering standards.

[0003] In order to facilitate normal assembly and disassembly, existing PDC drill bits must have a shackle groove in their structure. The shackle groove is located on the sub, and the width of the shackle groove limits the minimum sub length. However, in modern drilling, in order to accurately guide the wellbore trajectory, the drill bits generally require the sub length to be as short as possible.

[0004] Therefore, there is an urgent need for an ultra-short body PDC drill bit with a diameter-maintaining uncoupling method, which can greatly shorten the sub section length and comply with normal drilling procedures. At the same time, it reconciles the contradiction between the sub section length and the shackle groove width limit, which is conducive to the need for precise wellbore trajectory guidance. Utility Model Content

[0005] The purpose of this invention is to provide an ultra-short PDC drill bit with a diameter-maintaining section uncoupling method, which solves the problem that existing PDC drill bits must have an uncoupling groove in their structure, which is set on the short section. However, the width of the uncoupling groove limits the minimum length of the short section, affecting the accurate guidance of the wellbore trajectory.

[0006] To achieve the above objectives, this utility model provides an ultra-short body PDC drill bit with a gauge-maintaining section uncoupling mechanism, comprising a drill bit body, a standard gauge-maintaining section, an uncoupling gauge-maintaining section, gauge-maintaining teeth, a cutting assembly, and an ultra-short connector. Multiple standard gauge-maintaining sections and two uncoupling gauge-maintaining sections are fixedly arranged on the outer side of the drill bit body. The two uncoupling gauge-maintaining sections are symmetrically installed. Both the standard gauge-maintaining sections and the uncoupling gauge-maintaining sections are provided with gauge-maintaining teeth. The cutting assembly is provided on the drill bit body and corresponds to the positions of the multiple standard gauge-maintaining sections and the two uncoupling gauge-maintaining sections. The ultra-short connector is fixedly connected to the drill bit body and located at the bottom of the drill bit body.

[0007] The uncoupling and gauge-preserving section has an uncoupling groove, which is located on the side of the uncoupling and gauge-preserving end away from the drill bit body.

[0008] The cutting assembly includes a first blade, a second blade, and cutting teeth. There are three first blades, which are evenly spaced and fixedly installed on the drill body. There are three second blades, which are located between two of the first blades. The cutting teeth are installed on the first blades and the second blades.

[0009] The ultra-short connector includes a short connector and a drill bit connector. The short connector is fixedly connected to the drill bit body and is located at the bottom of the drill bit body. The drill bit connector is fixedly connected to the short connector and is located at the bottom of the short connector.

[0010] The ultra-short connector has a flow hole, which is disposed on the ultra-short connector and extends through the short connector and the drill bit connector.

[0011] This utility model discloses an ultra-short PDC drill bit with a caliper-maintaining section uncoupling mechanism. By setting the caliper-maintaining section uncoupling on the drill bit body, and designing the uncoupling groove at the caliper-maintaining surface of the caliper-maintaining section, the uncoupling groove is removed at the short-connection position, allowing the drill bit to be installed using the ultra-short connector. This not only complies with the conventional procedure that requires the uncoupling groove, but also makes the wellbore trajectory guidance more accurate. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0013] Figure 1 This is a top view of the ultra-short body PDC drill bit with the diameter-preserving section uncoupling method of this utility model.

[0014] Figure 2 This is a front view of the ultra-short body PDC drill bit with the diameter-preserving section uncoupling method of this utility model.

[0015] Figure 3 This is a bottom view of the ultra-short PDC drill bit with the diameter-preserving section uncoupling method of this utility model.

[0016] In the figure: 1-Drill bit body, 2-Ordinary gauge protection section, 3-Shackle gauge protection section, 31-Shackle groove, 4-Gauge protection tooth, 5-Cutting assembly, 51-First cutter wing, 52-Second cutter wing, 53-Cutting tooth, 6-Ultra-short connector, 61-Short connector, 62-Drill bit connector, 63-Flow hole. Detailed Implementation

[0017] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0018] Please see Figures 1 to 3 ,in Figure 1 This is a top view of the ultra-short body PDC drill bit with diameter-maintaining section uncoupling method of this utility model. Figure 2 This is a front view of the ultra-short body PDC drill bit with a diameter-maintaining section uncoupling method according to this utility model. Figure 3This is a bottom view of the ultra-short PDC drill bit with the diameter-preserving section uncoupling method of this utility model.

[0019] This utility model discloses an ultra-short PDC drill bit with a gauge-maintaining section and a gauge-maintaining section uncoupling mechanism: a drill bit body 1, a standard gauge-maintaining section 2, a gauge-maintaining section uncoupling 3, gauge-maintaining teeth 4, a cutting assembly 5, and an ultra-short connector 6. The gauge-maintaining section 3 has a gauge-maintaining groove 31. The cutting assembly 5 includes a first blade 51, a second blade 52, and cutting teeth 53. The ultra-short connector 6 includes a short connector 61 and a drill bit connector 62, and the ultra-short connector 6 has a flow hole 63. This solution solves the problem that existing PDC drill bits must have a gauge-maintaining groove 31, which is located on the short section. However, the width of the gauge-maintaining groove 31 limits the minimum short section length, affecting the accurate guidance of the wellbore trajectory. It can be understood that the aforementioned solution, by designing the gauge-maintaining surface of the gauge-maintaining section 3, eliminates the gauge-maintaining groove 31 at the short connector location, allowing the drill bit to be installed using the ultra-short connector 6. This not only complies with the conventional requirement of having a gauge-maintaining groove 31 but also improves the accuracy of the wellbore trajectory guidance.

[0020] In this embodiment, a plurality of ordinary gauge-keeping sections 2 and two uncoupling gauge-keeping sections 3 are fixedly provided on the outer side of the drill bit body 1. The two uncoupling gauge-keeping sections 3 are symmetrically installed. The ordinary gauge-keeping sections 2 and the uncoupling gauge-keeping sections 3 are provided with gauge-keeping teeth 4. The cutting assembly 5 is provided on the drill bit body 1 and corresponds to the positions of the plurality of ordinary gauge-keeping sections 2 and the two uncoupling gauge-keeping sections 3. The ultra-short connector 6 is fixedly connected to the drill bit body 1 and is located at the bottom of the drill bit body 1. The uncoupling groove 31 is provided on the side of the uncoupling gauge-keeping section 3 away from the drill bit body 1. The cutting assembly 5 is mounted on the top of the upper end of the drill bit body 1. The cutting assembly 5 makes uniform contact with the bottom rock to achieve omnidirectional drilling. Multiple standard gauge sections 2 and two uncoupling gauge sections 3 are evenly distributed on the outer side of the drill bit body 1. The two uncoupling gauge sections 3 are symmetrically arranged, and each uncoupling gauge section 3 has an uncoupling groove 31. The uncoupling groove 31 facilitates the disassembly of the drill bit, and the drill bit structure must have the uncoupling groove 31. By placing the uncoupling groove 31 on the drill bit body 1, the overall length of the drill bit can be shortened. The ultra-short connector 6 is fixedly installed on the drill bit body 1 to achieve drilling... The installation of the drill bit, with the ultra-short connector 6 set at the minimum short section length, can improve the guiding accuracy of the wellbore trajectory. Furthermore, the gauge protection teeth 4 are provided on both the ordinary gauge protection section 2 and the shackle gauge protection section 3, increasing their wear resistance and ensuring that the final wellbore diameter does not shrink. Therefore, by setting the shackle gauge protection section 3 on the drill bit body 1, and designing the shackle groove 31 at the gauge protection surface of the shackle gauge protection section 3, the shackle groove 31 is removed at the short connection position, allowing the drill bit to be installed using the ultra-short connector 6. This not only complies with the conventional requirement to have the shackle groove 31, but also makes the wellbore trajectory guidance more accurate.

[0021] The drill bit body 1 has three first cutting wings 51, which are evenly spaced and fixedly mounted on the drill bit body 1. It also has three second cutting wings 52, each located between two of the first cutting wings 51. Cutting teeth 53 are mounted on both the first and second cutting wings 51. The three first cutting wings 51 are evenly distributed on the drill bit body 1 with the center of the drill bit body 1 as the origin. The three second cutting wings 52 are respectively positioned between the gaps of the three first cutting wings 51. Cutting teeth 53 are fixedly mounted on both the first and second cutting wings 51, forming a radial distribution. This ensures that when the drill bit body 1 rotates, the cutting teeth 53 can evenly contact the bottom rock, achieving omnidirectional drilling.

[0022] Secondly, the short connector 61 is fixedly connected to the drill bit body 1 and located at the bottom of the drill bit body 1; the drill bit connector 62 is fixedly connected to the short connector 61 and located at the bottom of the short connector 61; the flow hole is provided on the ultra-short connector 6 and penetrates the short connector 61 and the drill bit connector 62. Compared with the existing short connector position, the short connector 61 eliminates the shackle groove 31, greatly shortening the short connector length and making the wellbore trajectory guidance more accurate. The drill bit connector 62 is welded to the short connector 61 or integrally formed for the installation and connection of the PDC drill bit. The flow hole is provided for the flow of drilling fluid into the drill bit body 1.

[0023] When using the ultra-short PDC drill bit with a caliper-protecting section uncoupling method according to this utility model, the caliper-protecting section 3 is set on the drill bit body 1, and the uncoupling groove 31 is designed at the caliper-protecting surface of the caliper-protecting section 3. Thus, the uncoupling groove 31 is removed at the short connection position, so that the drill bit can be installed using the ultra-short connector 6. This not only complies with the conventional procedure that the uncoupling groove 31 must be provided, but also makes the wellbore trajectory guidance more accurate.

[0024] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A short-body PDC drill bit with a diameter-preserving section uncoupling method, characterized in that, The drill bit body includes a standard gauge section, a shackle gauge section, gauge-keeping teeth, a cutting assembly, and an ultra-short connector. Multiple standard gauge sections and two shackle gauge sections are fixedly mounted on the outer side of the drill bit body. The two shackle gauge sections are symmetrically installed. Gauge-keeping teeth are provided on both the standard gauge section and the shackle gauge section. The cutting assembly is mounted on the drill bit body and corresponds to the positions of the multiple standard gauge sections and the two shackle gauge sections. The ultra-short connector is fixedly connected to the drill bit body and located at the bottom of the drill bit body.

2. The ultra-short body PDC drill bit with uncoupling method for diameter preservation section as described in claim 1, characterized in that, The uncoupling and gauge-maintaining section has an uncoupling groove, which is located on the side of the uncoupling and gauge-maintaining end away from the drill bit body.

3. The ultra-short body PDC drill bit with uncoupling method for diameter preservation section as described in claim 1, characterized in that, The cutting assembly includes a first blade, a second blade, and cutting teeth. There are three first blades, which are evenly spaced and fixedly mounted on the drill body. There are three second blades, which are located between two of the first blades. The cutting teeth are mounted on the first blades and the second blades.

4. The ultra-short body PDC drill bit with uncoupling method for diameter preservation section as described in claim 1, characterized in that, The ultra-short connector includes a short connector and a drill bit connector. The short connector is fixedly connected to the drill bit body and is located at the bottom of the drill bit body. The drill bit connector is fixedly connected to the short connector and is located at the bottom of the short connector.

5. The ultra-short body PDC drill bit with uncoupling method for diameter preservation section as described in claim 4, characterized in that, The ultra-short connector has a flow hole, which is disposed on the ultra-short connector and extends through the short connector and the drill bit connector.

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