Descaling drill bit applied to geothermal well or oilfield producing well

Abstract

The utility model discloses a descaling drill bit applied to a geothermal well or an oil field producing well, and particularly relates to the technical field of oil field exploitation equipment, the descaling drill bit comprises a rod body assembled with a drilling tool, one side of the rod body is provided with a movable groove, the inside of the movable groove is rotatably connected with a switching roller, and the two ends of the switching roller are provided with head bodies; fixing covers are hinged to the upper side and the lower side of the outer surface of the movable groove correspondingly, and a plurality of fastening holes are formed in the opposite sides of the two fixing cover plates correspondingly. According to the descaling drill bit applied to the geothermal well or the oil field producing well, in actual work, the two head bodies of different sizes are assembled with the two ends of the switching roller, switching can be conducted between the two head bodies of different sizes and the two fixed cover plates can be turned over only by rotating the switching roller, and therefore the descaling drill bit can be used for descaling the geothermal well or the oil field producing well. And bolts are sequentially inserted into the overlapped fastening holes to fix the switched switching rollers, so that the time required for replacing the head bodies with different sizes can be effectively shortened, and the efficiency of cleaning dirt on the well wall is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of oilfield extraction equipment technology, specifically to a descaling drill bit used in geothermal wells or oilfield production wells. Background Technology

[0002] In areas of abnormal calcium and magnesium ion concentration in oilfield production systems or medium-deep geothermal well systems, scale will form on the well wall during normal production. Over time, the scale will significantly reduce the diameter of the wellbore, thus affecting production. As a result, drilling tools will be used to rotate the descaling drill bit to remove the scale from the well wall.

[0003] A search revealed, for example, a utility model with publication number CN217380500U, which discloses a descaling drill bit for use in geothermal wells or oilfield production wells. This drill bit includes a drill rod and a drill bit connected together. A sleeve is provided outside the drill rod, with its outer diameter matching the inner diameter of the well wall. The bottom end of the sleeve has serrations. The sleeve rotates synchronously with the drill rod and the drill bit. The drill bit of this utility model has a relatively fixed size. Therefore, when a different size drill bit is needed, the currently used drill bit must be disassembled and a new drill bit installed. This process is time-consuming, reducing the efficiency of removing scale from the well wall. Therefore, to address these shortcomings, the inventor proposes a descaling drill bit for use in geothermal wells or oilfield production wells. Utility Model Content

[0004] Therefore, this utility model provides a descaling drill bit for use in geothermal wells or oilfield production wells, to solve the problem that it takes a long time to replace descaling drill bits of different sizes in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A descaling drill bit for use in geothermal wells or oilfield production wells includes a rod body assembled with a drill string. A movable groove is provided on one side of the rod body, and a switching roller is rotatably connected inside the movable groove. Both ends of the switching roller are provided with head bodies. Fixed cover plates are hinged to the upper and lower sides of the outer surface of the movable groove, and multiple fastening holes are provided on the opposite side of the two fixed cover plates.

[0007] Preferably, both ends of the switching roller are provided with insertion holes, and the upper and lower sides of the mounting holes are provided with mounting holes. A plug is fixedly installed on one side of the head body, and a connection hole is provided on the upper side of the outer surface of the plug.

[0008] Preferably, the dimensions of both mounting holes are the same as the dimensions of the connecting holes.

[0009] Preferably, two contraction holes are provided on the upper and lower sides of the outer surface of the switching roller, and a first spring is fixedly installed inside each of the four contraction holes. A limit head is fixedly installed on the end of each of the four first springs near the opening of the contraction hole, and a limit hole is provided on the upper and lower sides of the interior of the movable groove.

[0010] Preferably, two telescopic sleeves are fixedly installed on both sides of the outer surface of the rod, and a second spring is fixedly installed inside each of the four telescopic sleeves. A connecting rod is fixedly installed at the end of each of the four second springs near the opening of the telescopic sleeve, and two scrapers are fixedly installed at the ends of the four connecting rods away from the second springs.

[0011] Preferably, the cross-sectional shape of both fixed cover plates is arc-shaped.

[0012] This utility model has the following advantages:

[0013] This utility model discloses a descaling drill bit for use in geothermal wells or oilfield production wells. By setting a switching roller, in actual operation, the insertion hole is inserted into the insertion hole, and the bolt is inserted into the overlapping mounting hole and connecting hole, thereby assembling two different sized head bodies with the two ends of the switching roller. After use, when it is necessary to change to a different sized head body, simply rotate the switching roller to switch between the two different sized head bodies. Flip the two fixing cover plates and insert the bolts into the overlapping fastening holes to fix the switched switching roller. This can effectively reduce the time required to change to different sized head bodies and effectively improve the efficiency of removing scale from the well wall. Attached Figure Description

[0014] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0015] The structures, proportions, sizes, etc. disclosed in this specification are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0016] Figure 1 This is an overall structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the switching roller structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the insert block structure of this utility model;

[0019] Figure 4 This is a cross-sectional view of the switching roller of this utility model;

[0020] Figure 5 This is a cross-sectional view of the telescopic sleeve of this utility model.

[0021] In the diagram: 1. Rod body; 101. Switching roller; 102. Movable groove; 103. Fixed cover plate; 104. Fastening hole; 105. Head body; 1011. Insertion hole; 1012. Mounting hole; 1051. Insert block; 1052. Connecting hole; 1021. Retraction hole; 1022. First spring; 1023. Limiting head; 1024. Limiting hole; 1031. Telescopic sleeve; 1032. Second spring; 1033. Connecting rod; 1034. Scraper. Detailed Implementation

[0022] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] This utility model discloses a descaling drill bit applicable to geothermal wells or oilfield production wells, such as Figure 1-5 As shown, the rod body 1 is assembled with the drill bit. The drill bit can drive the rod body 1 to rotate. The drill bit is existing technology, so it will not be described in detail here. A movable groove 102 is provided on one side of the rod body 1, and a switching roller 101 is rotatably connected inside the movable groove 102. The switching roller 101 can rotate inside the movable groove 102.

[0024] Both ends of the switching roller 101 are provided with head bodies 105. When the switching roller 101 rotates, it can be used to switch between two head bodies 105 of different sizes. The upper and lower sides of the outer surface of the movable groove 102 are hinged with fixed cover plates 103, and multiple fastening holes 104 are opened on the opposite side of the two fixed cover plates 103. When the switching roller 101 rotates, the two fixed cover plates 103 are rotated to bring the two fixed cover plates 103 closer to each other. Then, bolts are inserted into the overlapping fastening holes 104 in sequence, and nuts are used to fix the two contacting fixed cover plates 103, thereby fixing the rotating switching roller 101.

[0025] Both fixed cover plates 103 have arc-shaped cross sections, so that when the two fixed cover plates 103 approach each other and come into contact, the two fixed cover plates 103 can better fit the outer surface of the rod body 1.

[0026] Both ends of the switching roller 101 are provided with insertion holes 1011, and the upper and lower sides of the mounting hole 1012 are also provided with mounting holes 1012. A plug block 1051 is fixedly installed on one side of the head body 105, and a connecting hole 1052 is provided on the upper side of the outer surface of the plug block 1051. Since the size of the two mounting holes 1012 is the same as the size of the connecting hole 1052, when the plug block 1051 is inserted into the insertion hole 1011, the two mounting holes 1012 will coincide with the connecting hole 1052. Then, the bolt is inserted into the coincident mounting holes 1012 and connecting holes 1052, and with the nut, the head body 105 and the switching roller 101 can be assembled so that two head bodies 105 of different sizes can be installed as needed before use.

[0027] Two contraction holes 1021 are opened on the upper and lower sides of the outer surface of the switching roller 101, and a first spring 1022 is fixedly installed inside each of the four contraction holes 1021. A limit head 1023 is fixedly installed on one end of each of the four first springs 1022 near the opening of the contraction hole 1021. When the limit head 1023 moves into the interior of the contraction hole 1021, it will squeeze the first spring 1022. Limit holes 1024 are opened on the upper and lower sides of the interior of the movable groove 102. After the switching roller 101 completes a 180-degree rotation, two of the limit heads 1023 will be inserted into the two limit holes 1024.

[0028] Two telescopic sleeves 1031 are fixedly installed on both sides of the outer surface of the rod body 1, and a second spring 1032 is fixedly installed inside each of the four telescopic sleeves 1031. A connecting rod 1033 is fixedly installed at one end of each of the four second springs 1032 near the opening of the telescopic sleeve 1031, and two scrapers 1034 are fixedly installed at the other end of each of the four connecting rods 1033 away from the second springs 1032. When the rod body 1 is in use, the second springs 1032 will cause the scrapers 1034 to contact the well wall and rotate the drill bit to drive the rod body 1 to rotate, so as to cooperate with the head body 105 to remove dirt from the well wall.

[0029] The working principle of this utility model is as follows: Insert the insertion hole 1011 into the insertion hole 1011, and insert the bolt into the overlapping mounting hole 1012 and connecting hole 1052 to assemble the two ends of the head body 105 of different sizes with the switching roller 101. Then, assemble the rod body 1 with the drill bit. Then, the drill bit drives the rod body 1 to rotate, thereby driving the head body 105 to rotate to remove the scale on the well wall. When it is necessary to switch between different sizes of head body 105, simply rotate the switching roller 101 to switch between the two different sizes of head body 105. Flip the two fixing cover plates 103 and insert the bolts into the overlapping fastening holes 104 in sequence to fix the switched switching roller 101.

[0030] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A descaling drill bit for use in geothermal wells or oilfield production wells, comprising a rod body (1) assembled with drill strings, characterized in that: A movable groove (102) is provided on one side of the rod (1), and a switching roller (101) is rotatably connected inside the movable groove (102). Both ends of the switching roller (101) are provided with head bodies (105). Fixed cover plates (103) are hinged to the upper and lower sides of the outer surface of the movable groove (102), and multiple fastening holes (104) are provided on the opposite side of the two fixed cover plates (103).

2. The descaling drill bit for geothermal wells or oilfield production wells according to claim 1, characterized in that: Both ends of the switching roller (101) are provided with insertion holes (1011), and the upper and lower sides of the mounting hole (1012) are provided with mounting holes (1012). A plug (1051) is fixedly installed on one side of the head body (105), and a connection hole (1052) is provided on the upper side of the outer surface of the plug (1051).

3. The descaling drill bit for use in geothermal wells or oilfield production wells according to claim 2, characterized in that; The dimensions of both mounting holes (1012) are the same as those of the connecting hole (1052).

4. The descaling drill bit for geothermal wells or oilfield production wells according to claim 1, characterized in that: The switching roller (101) has two contraction holes (1021) on both the upper and lower sides of its outer surface, and a first spring (1022) is fixedly installed inside each of the four contraction holes (1021). A limit head (1023) is fixedly installed at one end of each of the four first springs (1022) near the opening of the contraction hole (1021). Limit holes (1024) are opened on both the upper and lower sides of the interior of the movable groove (102).

5. The descaling drill bit for geothermal wells or oilfield production wells according to claim 1, characterized in that: Two telescopic sleeves (1031) are fixedly installed on both sides of the outer surface of the rod (1), and a second spring (1032) is fixedly installed inside each of the four telescopic sleeves (1031). A connecting rod (1033) is fixedly installed at the end of each of the four second springs (1032) near the opening of the telescopic sleeve (1031), and two scrapers (1034) are fixedly installed at the end of each of the four connecting rods (1033) away from the second spring (1032).

6. The descaling drill bit for use in geothermal wells or oilfield production wells according to claim 1, characterized in that: Both of the fixed cover plates (103) have an arc-shaped cross-section.

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