A new type of hooked scraper bit

Abstract

The present invention discloses a novel hook-type scraping bit, which comprises a support cylinder body. A tool rest is fixed at the bottom of the support cylinder body, and a plurality of hook-type tools are fixed on the tool rest. The hook-type tool comprises an arc-shaped tool bar and a scraping blade fixed to the inner side of one end of the tool bar, and the other end of the tool bar is fixed on the tool rest. The present invention can effectively reduce the phenomenon of bit balling, improve the drilling efficiency, shorten the construction period, save energy, enhance the company brand, and has certain social benefits. At the same time, it can effectively increase the tool life, reduce the construction cost, and has certain economic benefits.

Description

Technical Field

[0001] The invention relates to the field of drilling construction equipment, in particular to a novel curved hook type scraper drill bit. Background Art

[0002] In the drilling construction, when drilling into the clay layer, the clay is very easy to adhere to the surface of the drill bit and the tool, which frequently causes mud-covered drill. Due to the wrapping of clay drill cuttings, the drill bit tool cannot directly contact the rock layer, so the rock breaking efficiency is affected, resulting in a decrease in drilling efficiency; at the same time, mud-covered drill will prevent the mud from effectively cooling the tool in time, reducing the tool life. The mud-covered drill phenomenon during drilling construction seriously affects the drilling and well construction cycle, resulting in a large amount of time loss and waste of additional materials, greatly increasing the drilling cost. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a novel hook-type scraper drill bit which can effectively reduce the mud-encrusted drill phenomenon.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a new type of curved hook scraper drill bit, including a supporting cylinder, a tool holder is fixed at the bottom of the supporting cylinder, a plurality of curved hook type tools are fixed on the tool holder, the curved hook type tool includes an arc-shaped tool rod and a scraper fixed on the inner side of one end of the tool rod, and the other end of the tool rod is fixed on the tool holder.

[0005] Furthermore, a soil retaining plate is fixed to the outer side of the middle part of the tool rod of the hook-type tool.

[0006] Furthermore, the tool holder is designed in a frustum shape with a larger top and a smaller bottom, and a plurality of the hook-type cutting tools are radially arranged on the conical surface of the tool holder.

[0007] Furthermore, the hook-type tool also includes a tool rod seat, a limit block in an inverted L shape is provided on the outer side of the other end of the tool rod, a limit hole is opened on the tool rod seat, the tool rod seat abuts against the outer side of the other end of the tool rod, and the protruding part of the limit block is inserted into the limit hole, the tool rod seat and the tool rod are connected to each other by bolts, and the tool rod seat is fixed on the tool holder.

[0008] Furthermore, it also includes a fishtail knife group, which includes a support plate fixed at the bottom center of the support cylinder and with a V-shaped bottom edge, and a plurality of knife bodies fixed at intervals on the bottom edge of the support plate, and the support plate extends downward beyond each of the hook-type knives.

[0009] Furthermore, a plurality of edge cutters are fixed around the edges of the bottom of the supporting cylinder.

[0010] Further, an upper wear-resistant ring is provided around the outer periphery of the upper end of the support cylinder body, and a lower wear-resistant ring is provided around the outer periphery of the lower end of the support cylinder body.

[0011] Further, it further includes a central pipe sleeved inside the support cylinder body, and both the upper and lower ends of the central pipe extend beyond the support cylinder body.

[0012] Further, it further includes an air duct. The air duct is located above the support cylinder body. One end of the air duct is designed upward, and the other end of the air duct is communicated with the central pipe.

[0013] Further, it further includes a flange plate. The flange plate is fixed to the top of the support cylinder body through a plurality of wing plates.

[0014] The beneficial effects of the present invention are reflected in:

[0015] The present invention designs a hook-type tool to be cooperatively installed on a drill bit. During the drilling process, the clay drill cuttings move along the tool shank. Since the tool shank is not straight, the movement path of the clay drill cuttings gradually deviates from the tool shank, so that the clay drill cuttings are not easily continued to flow to and adhere to the tool shank, thereby realizing the separation of the argillaceous cuttings from the tool, not easily adhering to the tool, reducing the phenomenon of mud-packing the drill, and improving the drilling efficiency in the clay layer.

[0016] The present invention can improve the drilling efficiency, shorten the construction period, save energy, enhance the company brand, and has certain social benefits. At the same time, it can effectively increase the tool life, reduce the construction cost, and has certain economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of an embodiment of the present invention.

[0018] Figure 2 is a schematic structural diagram of the hook-type tool in an embodiment of the present invention.

[0019] The labels of each component in the drawings are: 1 support cylinder body, 11 tool holder, 12 upper wear-resistant ring, 13 lower wear-resistant ring, 14 wing plate, 2 hook-type tool, 21 tool shank, 22 scraper, 23 retaining plate, 24 tool shank seat, 25 limiting hole, 26 limiting block, 27 bolt, 3 fishtail cutter group, 31 support plate, 32 cutter body, 4 side cutter, 5 central pipe, 6 air duct, 7 flange plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0022] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, "a plurality" means more than two. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0023] See Figure 1 and Figure 2 。

[0024] The novel hook-type scraping bit of the present invention includes a support cylinder 1. A tool holder 11 is fixed at the bottom of the support cylinder 1. A plurality of hook-type tools 2 are fixed on the tool holder 11. The hook-type tool 2 includes an arc-shaped tool bar 21 and a scraping blade 22 fixed to the inner side of one end of the tool bar 21. The other end of the tool bar 21 is fixed on the tool holder 11.

[0025] The present invention designs a hook-type tool to be cooperatively installed on the drill bit. During the drilling process, the clay drill cuttings move along the tool bar. Since the tool bar is not straight, the movement path of the clay drill cuttings gradually deviates from the tool bar, so that the clay drill cuttings are not easily continued to flow to and adhere to the tool bar, thereby realizing the separation of the muddy rock cuttings from the tool, not easily adhering to the tool, reducing the phenomenon of mud caking on the drill bit, and improving the drilling efficiency in the clay layer.

[0026] In one embodiment, the tool rest 11 is designed in a frustum shape with a larger upper part and a smaller lower part, and a plurality of the hook-shaped cutters 2 are radially arranged on the conical surface of the tool rest. Conventional tool rests are mostly plate-shaped, while in the present invention, the tool rest is redesigned into a frustum shape, greatly reducing the surface area of the tool rest, thereby reducing the probability of adhesion between clay drill cuttings and the tool rest and improving the drilling efficiency in the clay layer.

[0027] In one embodiment, a retaining plate 23 is fixedly arranged on the outer side of the middle part of the tool shank 21 of the hook-shaped cutter 2. During drilling, the cut clay drill cuttings will move along the arc of the tool shank to reach the retaining plate, and under the action of the retaining plate, the muddy rock cuttings will be separated from the scraper, thereby further improving the effect of separating clay drill cuttings.

[0028] In one embodiment, a tool shank seat 24 is further included. A limiting block 26 in an inverted L shape is arranged on the outer side of the other end of the tool shank 21. A limiting hole 25 is formed in the tool shank seat 24. The tool shank seat 24 abuts against the outer side of the other end of the tool shank 21, and the protruding part of the limiting block 26 is clamped into the limiting hole 25. The tool shank seat 24 and the tool shank 21 are connected to each other by a bolt 27, and the tool shank seat 24 is fixed on the tool rest 11. With such a design, when it is necessary to remove the cutter, the bolt can be removed, and the tool shank can be separated from the tool shank seat, thereby facilitating the later maintenance of the cutter. And under the limiting action of the limiting hole and the limiting block, the installation of the cutter is more stable and reliable.

[0029] In one embodiment, a fishtail cutter group 3 is further included. The fishtail cutter group 3 includes a support plate 31 with a V-shaped bottom edge fixed at the center of the bottom of the support cylinder 1 and a plurality of cutter bodies 32 fixedly arranged at intervals on the bottom edge of the support plate 31, and the support plate 31 extends downward beyond each of the hook-shaped cutters 2. During the drilling process, the fishtail cutter can cut the rock formation surface in advance, destroy the integrity of the rock formation, reduce the strength, and is beneficial to rapid drilling.

[0030] In one embodiment, a plurality of side cutters 4 are further fixedly arranged on the four peripheral edges of the bottom of the support cylinder 1. The side cutters are used for cutting the wellbore wall edge.

[0031] In one embodiment, a top wear-resistant ring 12 is arranged around the outer periphery of the upper end of the support cylinder 1, and a bottom wear-resistant ring 13 is arranged around the outer periphery of the lower end of the support cylinder 1. To increase the wear resistance of the support cylinder and improve the service life.

[0032] In one embodiment, a central pipe 5 sleeved in the support cylinder 1 is further included, and both the upper and lower ends of the central pipe 5 extend beyond the support cylinder 1. The central pipe is used for mud reflux.

[0033] In one embodiment, it further includes an air duct 6 which is located above the support cylinder body 1. One end of the air duct 6 is designed to face upward, and the other end of the air duct 6 is communicated with the central pipe 5. The air duct is used to input high-pressure gas to the working face, thereby increasing the pressure and causing the mud to flow back.

[0034] In one embodiment, it further includes a flange 7 which is fixed to the top of the support cylinder body 1 by a plurality of wing plates 14. With such a design, the drill bit can be connected and fixed to other required devices through the flange, and the practicability is better.

[0035] It should be understood that the examples and embodiments described herein are only for illustration and are not intended to limit the present invention. Those skilled in the art can make various modifications or changes according to it. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A new type of hook-shaped scraping bit, comprising a support cylinder body, wherein a tool rest is fixed at the bottom of the support cylinder body, and is characterized in that: A plurality of hook-shaped cutters are fixed on the tool rest. The hook-shaped cutter includes an arc-shaped cutter bar and a scraping cutter fixed on the inner side of one end of the cutter bar. The other end of the cutter bar is fixed on the tool rest; The tool rest is designed as a frustum of a cone with a larger top and a smaller bottom. A plurality of the hook-shaped cutters are radially arranged on the conical surface of the tool rest; A soil retaining plate is fixed on the outer side of the middle part of the cutter bar of the hook-shaped cutter; A plurality of side cutters are further fixed on the peripheral edge of the bottom of the support cylinder body; It further includes a cutter bar seat. A reverse L-shaped limiting block is arranged on the outer side of the other end of the cutter bar. A limiting hole is formed in the cutter bar seat. The cutter bar seat abuts against the outer side of the other end of the cutter bar, and the protruding part of the limiting block is clamped into the limiting hole. The cutter bar seat and the cutter bar are connected to each other by bolts, and the cutter bar seat is fixed on the tool rest; It further includes a fish tail cutter group. The fish tail cutter group includes a support plate fixed at the center of the bottom of the support cylinder body and having a V-shaped bottom edge, and a plurality of cutter bodies are fixedly arranged at intervals on the bottom edge of the support plate, and the support plate extends downward beyond each of the hook-shaped cutters.

2. The novel hook-type scraping bit according to claim 1, wherein: An upper wear-resistant ring is arranged on the outer periphery of the upper end of the support cylinder body, and a lower wear-resistant ring is arranged on the outer periphery of the lower end of the support cylinder body.

3. The novel hook-type scraping drill bit according to claim 1 or 2, characterized in that: It further includes a central pipe sleeved in the support cylinder body, and both the upper and lower ends of the central pipe extend beyond the support cylinder body.

4. The novel hooked scraper bit according to claim 3, wherein: It further includes an air duct. The air duct is located above the support cylinder body. One end of the air duct is designed upward, and the other end of the air duct is communicated with the central pipe.

5. The novel hook-type scraping drill bit according to claim 1 or 2, characterized in that: It further includes a flange plate. The flange plate is fixed on the top of the support cylinder body through a plurality of wing plates.

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