Water well drill rod centralizer

Abstract

The utility model discloses a water well drill rod centralizer which comprises a drill main rod and an operation display device, a drill bit is fixedly connected to the bottom of the drill main rod, and a centralizing assembly is arranged on the circumferential face of the drill main rod. The centralizing assembly comprises a connecting ring, a top plate, an upper connecting block, a front plate, a pressure sensor, an electric hydraulic rod, a top head, a wedge block, a bottom connecting block and a side plate, the connecting ring is fixedly connected with the circumferential surface of the drill main rod, and the top plate is fixedly connected with the circumferential surface of the connecting ring. By arranging the drill main rod, the drill bit and the centralizing assembly, the pressure sensor is arranged outside the centralizing assembly and can detect the pressure transmitted from the inner wall of a well hole, and the electric hydraulic rods, the ejector heads and the wedge blocks are arranged inside the centralizing assembly, so that when it is detected that the pressure of the inner wall is not uniform, the corresponding electric hydraulic rods can be adjusted; and the wedge block is pushed to further abut against or contract the contact force with the inner wall of the well hole, so that the effect of actively stabilizing the drill rod is achieved, and the perpendicularity of well drilling is improved.

Description

Technical Field

[0001] This utility model relates to the field of centralizers, and in particular to a centralizer for a water well drill pipe. Background Technology

[0002] Stabilizers, also known as centering devices, are tools used to stabilize downhole drilling tools and prevent deviation. They are connected to a section of the drill string near the larger diameter drill string and are used to stabilize the drilling direction. They are crucial tools in oil, gas, and geological exploration drilling to prevent well deviation changes. Centering devices are also frequently used during water well drilling to ensure the verticality of the well.

[0003] Existing stabilizers generally include spiral, straight-edged, and oblique straight-edged types, but their shapes are all fixed and can only perform passive stabilization, resulting in low initiative. When encountering excessively hard formations, the stabilization effect of the stabilizer on the drill bit is reduced, leading to low drilling verticality. Utility Model Content

[0004] The purpose of this utility model is to provide a water well drill pipe stabilizer. The stabilizer assembly is equipped with a pressure sensor on the outside to detect the pressure transmitted from the inner wall of the wellbore. The inside is equipped with an electric hydraulic rod, a top head, and a wedge. When uneven pressure is detected on the inner wall, the corresponding electric hydraulic rod can be adjusted to push the wedge to further tighten or contract the contact force with the inner wall of the wellbore, thereby playing a role in actively stabilizing the drill pipe and improving the verticality of drilling.

[0005] To achieve the above objectives, a water well drill pipe centralizer is provided, comprising: a main drill pipe and an operation display device. A drill bit is fixedly connected to the bottom of the main drill pipe. A centralizer assembly is provided on the circumferential surface of the main drill pipe. The centralizer assembly includes a connecting ring, a top plate, an upper connecting block, a front plate, a pressure sensor, an electro-hydraulic rod, a mandrel, a wedge, a bottom connecting block, and side plates. The connecting ring is fixedly connected to the circumferential surface of the main drill pipe. The top plate is fixedly connected to the circumferential surface of the connecting ring. The upper connecting block is fixedly connected to the bottom of the top plate. The front plate is fixedly connected to the bottom of the upper connecting block. A pressure sensor is fixedly connected to the front side wall of the front plate. An electro-hydraulic rod is fixedly connected to the bottom of the top plate. A mandrel is fixedly connected to the bottom of the electro-hydraulic rod. The mandrel is spherical. A wedge and a bottom connecting block are fixedly connected to the rear side wall of the front plate. Side plates are fixedly connected to the left and right side walls of the front plate.

[0006] According to the aforementioned water well drill pipe centralizer, the top plate, upper connecting block, front plate, bottom connecting block, and side plate form a closed box-shaped body, and the electro-hydraulic rod, top head, and wedge are all located inside the box-shaped body. This protects the internal structure.

[0007] According to the aforementioned water well drill pipe centralizer, four of each of the following components are provided: top plate, upper connecting block, front plate, pressure sensor, electro-hydraulic rod, top head, wedge block, and bottom connecting block, symmetrically distributed on the connecting ring; and eight of the following side plates are provided. This allows for active adjustment in multiple directions to ensure the verticality of the drill pipe during drilling.

[0008] According to the aforementioned water well drill pipe centralizer, the upper connecting block, bottom connecting block, and side plate are all made of highly elastic, wear-resistant plastic material. This allows for deformation during operation.

[0009] According to the aforementioned water well drill pipe centralizer, the wedge is located below the mandrel. When the electro-hydraulic rod pushes the mandrel downward, it can compress the wedge, thereby tilting the front plate.

[0010] According to the aforementioned water well drill pipe centralizer, there are two centralizer components, which are distributed vertically on the main drill pipe.

[0011] According to the aforementioned water well drill pipe centralizer, both the electro-hydraulic rod and the pressure sensor are electrically connected to an operation display device. The operation display device can control the electro-hydraulic rod and receive pressure information transmitted from the pressure sensor, thereby facilitating the understanding of the pressure between the centralizer and the wellbore.

[0012] The above solution has the following advantages: by setting up a drill rod, drill bit and centering assembly, the centering assembly is equipped with a pressure sensor on the outside to detect the pressure transmitted from the inner wall of the wellbore, and an electric hydraulic rod, a top head and a wedge inside. When uneven pressure is detected on the inner wall, the corresponding electric hydraulic rod can be adjusted to push the wedge to further tighten or contract the contact force with the inner wall of the wellbore, thereby playing a role in actively stabilizing the drill rod and improving the verticality of drilling.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is a front view of a water well drill pipe stabilizer according to the present invention;

[0016] Figure 2 This is a schematic diagram of the straightening component structure of a water well drill pipe straightener according to the present invention;

[0017] Figure 3 This is a schematic cross-sectional view of the straightening component of a water well drill pipe straightener according to the present invention.

[0018] Figure 4This is a top view of a water well drill pipe straightener according to the present invention.

[0019] Legend:

[0020] 1. Drill rod; 2. Drill bit; 3. Straightening assembly; 301. Connecting ring; 302. Top plate; 303. Upper connecting block; 304. Front plate; 305. Pressure sensor; 306. Electro-hydraulic rod; 307. Top head; 308. Wedge block; 309. Bottom connecting block; 310. Side plate. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] Reference Figure 1-4This utility model discloses a water well drill pipe straightener, comprising: a main drill pipe 1 and an operation display device (not shown in the figure). A drill bit 2 is fixedly connected to the bottom of the main drill pipe 1. A straightener assembly 3 is provided on the circumferential surface of the main drill pipe 1. There are two straightener assemblies 3, which are distributed vertically on the main drill pipe 1. The straightener assembly 3 includes a connecting ring 301, a top plate 302, an upper connecting block 303, a front plate 304, a pressure sensor 305, an electro-hydraulic rod 306, a top head 307, a wedge block 308, a bottom connecting block 309, and a side plate 310. The connecting ring 301 is fixedly connected to the circumferential surface of the drill rod 1. A top plate 302 is fixedly connected to the circumferential surface of the connecting ring 301. An upper connecting block 303 is fixedly connected to the bottom of the top plate 302. A front plate 304 is fixedly connected to the bottom of the upper connecting block 303. A pressure sensor 305 is fixedly connected to the front side wall of the front plate 304. The pressure sensor 305 can detect the interaction force between the front plate 304 and the well wall during drilling. An electro-hydraulic rod 306 is fixedly connected to the bottom of the top plate 302. A top head 3 is fixedly connected to the bottom of the electro-hydraulic rod 306. 07. The mandrel 307 is spherical. A wedge 308 and a bottom connecting block 309 are fixedly connected to the rear side wall of the front plate 304. The wedge 308 is located below the mandrel 307, and the bottom connecting block 309 is used to stabilize the bottom of the front plate 304. When the force detected by the pressure sensor 305 is abnormal, the electro-hydraulic rod 306 corresponding to the pressure sensor 305 can be adjusted to push the mandrel 307 downward, thereby squeezing the wedge 308 and moving the wedge 308 away from the connecting ring 301, thus tilting the front plate 304 and making the bottom of the front plate 304 more closely fit the well wall. This reaction acts on the drill string 1, keeping it vertical and improving the verticality of the drilling. Side plates 310 are fixedly connected to the left and right side walls of the front plate 304. The number of top plate 302, upper connecting block 303, front plate 304, pressure sensor 305, electric hydraulic rod 306, top head 307, wedge block 308 and bottom connecting block 309 are all four, and they are symmetrically distributed on the connecting ring 301. The number of side plates 310 is eight. The four pressure sensors 305 detect the forces in four directions, which can achieve better detection effect.

[0023] The top plate 302, upper connecting block 303, front plate 304, bottom connecting block 309, and side plate 310 form a closed box-shaped body. The electro-hydraulic rod 306, top head 307, and wedge block 308 are all located inside the box-shaped body. The upper connecting block 303, bottom connecting block 309, and side plate 310 are all made of highly elastic and wear-resistant plastic material. When the wedge block 308 is squeezed, the upper connecting block 303, bottom connecting block 309, and side plate 310 all deform, thereby tilting the front plate 304. The electro-hydraulic rod 306 and pressure sensor 305 are electrically connected to the operation display device. The electro-hydraulic rod 306 and pressure sensor 305 are connected to the operation display device through a rotary joint, which does not affect signal transmission. The operation display device can control the electro-hydraulic rod 306 and receive the pressure information transmitted back by the pressure sensor 305, thereby facilitating the understanding of the pressure between the centralizer and the well wall.

[0024] Working principle: During drilling, both the drill bit 2 and the centering assembly 3 are deeply embedded below the ground. When the pressure sensor 305 detects an abnormal force, the electric hydraulic rod 306 corresponding to the pressure sensor 305 can be adjusted to push the top head 307 downward, thereby squeezing the wedge block 308 and moving the wedge block 308 away from the connecting ring 301. This causes the front plate 304 to tilt, and the bottom of the front plate 304 to be closer to the well wall. This reaction acts on the drill string 1, allowing the drill string 1 to actively maintain verticality and improve the verticality of the drilling. During the tilting of the front plate 304, the upper connecting block 303, the bottom connecting block 309, and the side plate 310 all deform, coordinating with the tilting of the bottom of the front plate 304.

[0025] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A water well drill pipe centralizer comprising: The utility model provides a drill main rod (1) and operating display device, its characterized in be, the bottom fixed connection of drill main rod (1) has drill bit (2), the circumferential surface of drill main rod (1) is provided with centralizing assembly (3), centralizing assembly (3) includes connecting ring (301), roof (302), upper connecting block (303), front plate (304), pressure sensor (305), electric hydraulic rod (306), top head (307), wedge (308), bottom connecting block (309) and side plate (310), connecting ring (301) is fixedly connected with the circumferential surface of drill main rod (1), the circumferential surface of connecting ring (301) is fixedly connected with roof (302), the bottom fixed connection of roof (302) has upper connecting block (303), the bottom fixed connection of upper connecting block (303) has front plate (304), the front side wall of front plate (304) is fixedly connected with pressure sensor (305), the bottom fixed connection of roof (302) has electric hydraulic rod (306), the bottom fixed connection of electric hydraulic rod (306) has top head (307), top head (307) is spherical, the rear side wall of front plate (304) is fixedly connected with wedge (308) and bottom connecting block (309), the left and right side walls of front plate (304) are fixedly connected with side plate (310).

2. A water well drill pipe centralizer according to claim 1, characterized in that, The roof (302), upper connecting block (303), front plate (304), bottom connecting block (309) and side plate (310) form a closed box, and the electric hydraulic rod (306), top head (307) and wedge (308) are located inside the box.

3. A water well drill pipe centralizer according to claim 1, characterized in that, The number of the roof (302), upper connecting block (303), front plate (304), pressure sensor (305), electric hydraulic rod (306), top head (307), wedge (308) and bottom connecting block (309) is four, and they are symmetrically distributed on the connecting ring (301), and the number of the side plate (310) is eight.

4. A water well drill pipe centralizer according to claim 1, characterized in that, The upper connecting block (303), bottom connecting block (309) and side plate (310) are made of high-elastic wear-resistant plastic material.

5. A wellbore drill pipe centralizer according to claim 1, wherein, The wedge (308) is located below the top head (307).

6. A wellbore drill pipe centralizer according to claim 1, wherein, The number of the centralizing assembly (3) is two, and they are distributed on the drill main rod (1) in an up-down manner.

7. A wellbore drill pipe centralizer according to claim 1 wherein, The electric hydraulic rod (306) and pressure sensor (305) are electrically connected with the operating display device.

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