Halogen well sidetracking windowing drilling device

Abstract

The utility model discloses a bittern well sidetracking windowing drilling device, and belongs to the technical field of drilling equipment. A bittern well sidetrack drilling windowing drilling device comprises a windowing structure and a deflecting structure corresponding to the windowing structure, the windowing structure and the deflecting structure are connected through a shear pin, a guiding inclined face is arranged on the top of the deflecting structure, a containing groove is formed in the guiding inclined face, and the containing groove is communicated with the windowing structure. The shear pin is connected with the bottom face of the containing groove through a first connecting face, and the shear pin is connected with the windowing structure through a second connecting face. The device has the advantages that the shear pin is prevented from influencing the advancing of the drill rod in the subsequent drilling process, and the damage risk of the drill rod and the windowing milling cone is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling equipment, in particular to a brine well side-drilling window drilling device. Background Art

[0002] In mining drilling and workover projects, to reduce production costs, damaged or abandoned wells are often used to extend the wellbore to other oil layers or other intervals by drilling a window inside the casing. This allows the wellbore to continue production. This sidetracking process is widely used in the drilling of oil and brine wells.

[0003] The traditional side drilling windowing process involves first lowering the whipstock to a predetermined position in the well, securing the whipstock, re-drilling, using the whipstock to guide the window milling cone, creating a window on the casing sidewall, and finally drilling again, using the drill bit to continue drilling at the windowed location. Considering that the aforementioned process requires multiple drilling operations, which seriously impacts construction progress, patents with application numbers 2011200788492 and 2023102673359 both propose a method for connecting the window milling cone and the whipstock via shear pins. This allows the whipstock to be secured and the side windowing completed with only a single drilling operation. Consequently, this construction process has become the most commonly used side drilling windowing method.

[0004] Then, the shear pins are an important structure connecting the milling cone and the whipstock. After the whipstock is fixed, the milling cone applies torque to break the shear pins, thereby disconnecting the milling cone and the whipstock. However, the current shear pins are mainly various bolt structures. After the shear pins are broken from the milling cone, they are still fixed on the surface of the whipstock, affecting the subsequent advancement of the drill pipe. Utility Model Content

[0005] The utility model aims to solve the problem in the prior art that the shear nails will affect the continued advancement of the drill rod after being twisted off, and proposes a brine well side drilling window drilling device.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A brine well side drilling window drilling device includes a window structure and a deflection structure corresponding to the window structure, the window structure and the deflection structure are connected by shear nails, the top of the deflection structure is provided with a guide slope, the guide slope is provided with a receiving groove, the shear nails are connected to the bottom surface of the receiving groove by a first connecting surface, and the shear nails are connected to the window structure by a second connecting surface.

[0008] Furthermore, a first arc surface is provided on a side of the first connecting surface close to the rotation direction of the window structure.

[0009] Furthermore, a second curved surface is provided on a side of the second connecting surface away from the rotation direction of the window structure.

[0010] Furthermore, a support block corresponding to the second arc surface is provided on the guide inclined surface, and the support block is fixedly connected to the guide inclined surface.

[0011] Furthermore, the shear nails are located at the top of the receiving groove, the groove depth of the receiving groove gradually increases from top to bottom, and the groove depth value of the bottom of the receiving groove is greater than the thickness value of the shear nails.

[0012] Furthermore, the longitudinal length of the contact surface between the shear pins and the window structure and the beveling structure is greater than the transverse length.

[0013] Furthermore, the window opening structure includes a drill rod and a window opening milling cone installed at the end of the drill rod, and the shear nail is connected to the window opening milling cone.

[0014] Compared with the prior art, the present invention provides a brine well side-drilling window drilling device, which has the following beneficial effects:

[0015] The utility model relates to a brine well side drilling window drilling device. When in use, the window structure drives the inclined structure to extend into a predetermined position inside the brine well. After the inclined structure is controlled to be fixed in the brine well, the window structure is rotated. The window structure twists the shear nail away from one end of the window structure by torsion. Then, when the window structure continues to drive the shear nail to rotate, it hits the side wall of the receiving groove, and the shear nail is broken from the window structure. The shear nail falls into the receiving groove, thereby preventing the shear nail from affecting the progress of the drill rod during the subsequent drilling process and reducing the risk of damage to the drill rod and the window milling cone.

[0016] Other advantages, objectives and features of the present invention will be described in the following description to some extent; and will be apparent to those skilled in the art based on an examination of the following; or may be taught from the practice of the present invention to some extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the main cross-sectional effect of the whipstock body of the present invention;

[0019] Figure 3 This is a schematic diagram of the connection effect between the drill bit and the shear nail of the utility model;

[0020] Figure 4 For the utility model Figure 3 Schematic diagram of the magnified effect of the structure of part A;

[0021] Figure 5This is a three-dimensional schematic diagram of the shear nail structure of the utility model;

[0022] Figure 6 This is a schematic diagram of the whipstock main structure from the right front perspective of the present invention;

[0023] Figure 7 For the utility model Figure 6 Schematic diagram of the magnified effect of the structure of part B;

[0024] Figure 8 This is a schematic diagram of the whipstock main structure from the right side of the present invention;

[0025] Figure 9 This is a schematic diagram of the whipstock main structure from the right rear perspective of the present invention;

[0026] Figure 10 For the utility model Figure 9 Schematic diagram of the magnified effect of the structure of part C in the middle.

[0027] In the picture:

[0028] 1. Window structure; 101. Window milling cone; 102. Drill rod; 2. Inclination structure; 201. Inclination device body; 202. Guide slope; 203. Receiving groove; 204. Support block; 3. Shear pins; 301. First connecting surface; 302. First arc surface; 303. Second connecting surface; 304. Second arc surface. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] Reference Figure 1-10 The utility model is a brine well side drilling window drilling device, including a window structure 1 and an inclination structure 2 corresponding to the window structure 1. The window structure 1 includes a drill rod 102 and a window milling cone 101 installed at the end of the drill rod 102. The window milling cone 101 is driven by the drill rod 102 to drill holes and open windows on the side wall of the brine well.

[0031] The window opening structure 1 and the inclination structure 2 are connected by shear nails 3. The inclination structure 2 includes a whipstock body 201. The whipstock body 201 is tightened and fixed in the brine well at a predetermined position through its own structure. A guide slope 202 is processed on the top of the whipstock body 201. The guide slope 202 is an arc-shaped slope, which is used to guide the window opening milling cone 101 to point to the side wall of the brine well.

[0032] A receiving groove 203 is processed on the guide inclined surface 202, and the shearing nail 3 is connected to the bottom surface of the receiving groove 203 through a first connecting surface 301. Most of the structure of the shearing nail 3 is located in the receiving groove 203, and the shearing nail 3 is connected to the window structure 1 through a second connecting surface 303, that is, the two ends of the shearing nail 3 are respectively connected to the bottom surface of the receiving groove 203 and the outer side wall of the window milling cone 101 of the window structure 1.

[0033] A first arc surface 302 is processed on the side of the first connecting surface 301 close to the rotation direction of the window structure 1. The first arc surface 302 is used to reduce the connection length between the first connecting surface 301 and the receiving groove 203 in the rotation direction of the window milling cone 101, so as to facilitate the window milling cone 101 to twist off the shear nail 3 through the first connecting surface 301 when rotating.

[0034] A second arc surface 304 is processed on the side of the second connecting surface 303 away from the rotation direction of the window structure 1. The second arc surface 304 is used to reduce the connection length between the second connecting surface 303 and the window milling cone 101 in the rotation direction of the window milling cone 101, so as to facilitate twisting off the shear nail 3 through the second connecting surface 303 when the window milling cone 101 rotates.

[0035] A support block 204 corresponding to the second arc surface 304 is welded on the guide bevel 202, and the support block 204 is fixedly connected to the guide bevel 202. The end face of the support block 204 close to the second arc surface 304 is a concave surface, and the second arc surface 304 is a convex surface. The concave surface on the support block 204 corresponds to the convex surface on the second arc surface 304, and is used to fit the second arc surface 304, and to support the groove gap between the second arc surface 304 and the window milling cone 101.

[0036] When the window milling cone 101 just starts to rotate, the support of the support block 204 at the second arc surface 304 can prevent the shear nail 3 from bending toward the groove gap between the second arc surface 304 and the window milling cone 101, thereby preventing the shear nail 3 from breaking from the second connecting surface 303.

[0037] However, due to the lack of support at the first arc surface 302 at the first connecting surface 301 , when a torsion occurs along the circumferential direction of the window milling cone 101 , the shear nail 3 is more likely to break from the first connecting surface 301 connected to the bottom surface of the receiving groove 203 .

[0038] The shear nail 3 is located at the top of the receiving groove 203. The depth of the receiving groove 203 gradually increases from top to bottom. The depth of the bottom of the receiving groove 203 is greater than the thickness of the shear nail 3. When the shear nail 3 is completely twisted off, it will fall into the handle 203. And because the depth of the bottom of the receiving groove 203 is greater than the thickness (radial length) of the shear nail 3, the shear nail 3 can be effectively prevented from leaking out of the receiving groove 203, thereby avoiding obstruction of the drilling action of the drill rod 102.

[0039] The longitudinal length of the contact surface between the shearing nail 3 and the window structure 1 and the deflecting structure 2 is greater than the transverse length, so that the force strength of the shearing nail 3 and the window structure 1 and the deflecting structure 2 in the longitudinal direction (the longitudinal direction is the axial direction of the drill pipe 102) is greater than the force strength of the shearing nail 3 and the window structure 1 and the deflecting structure 2 in the transverse direction (the transverse direction is the circumferential direction of the window milling cone 101, that is, the rotation direction), thereby satisfying the window structure 1 driving the deflecting structure 2 to fall in the brine well through the shearing nail 3, and at the same time, the shearing nail 3 can be twisted off during rotation.

[0040] Working principle: The window milling cone 101 is driven by the drill rod 102, and the window milling cone 101 drives the inclination structure 2 to extend into the predetermined position inside the brine well through the shear nail 3. After the control of the inclination device body 201 is fixed in the brine well, the window structure 1 is rotated, and the window milling cone 101 twists off the shear nail 3 from the first connecting surface 301 through torque, and then the window milling cone 101 continues to rotate and drives the shear nail 3. When the shear nail 3 hits the side wall of the receiving groove 203, the shear nail 3 and the window milling cone 101 are broken from the second connecting surface 303, and the shear nail 3 falls into the receiving groove 203. The window milling cone 101, driven by the drill rod 102, drills and opens the window along the guide inclined surface 202 toward the side wall of the brine well.

[0041] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0043] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A brine well side-drilling window drilling device, comprising a window structure (1) and a deflection structure (2) corresponding to the window structure (1), wherein the window structure (1) and the deflection structure (2) are connected via shear nails (3), and characterized in that: A guiding slope (202) is provided at the top of the deflection structure (2), a receiving groove (203) is provided on the guiding slope (202), the shearing pin (3) is connected to the bottom surface of the receiving groove (203) via a first connecting surface (301), and the shearing pin (3) is connected to the window structure (1) via a second connecting surface (303).

2. A brine well side-drilling window drilling device according to claim 1, characterized in that: A first arc surface (302) is provided on the side of the first connecting surface (301) close to the rotation direction of the window structure (1).

3. A brine well side-drilling window drilling device according to claim 1, characterized in that: A second curved surface (304) is provided on the side of the second connecting surface (303) away from the rotation direction of the window structure (1).

4. A brine well side-drilling window drilling device according to claim 3, characterized in that: A support block (204) corresponding to the second arc surface (304) is provided on the guide inclined surface (202), and the support block (204) is fixedly connected to the guide inclined surface (202).

5. The brine well side-drilling window drilling device according to claim 1, characterized in that: The shear nail (3) is located at the top of the receiving groove (203), the groove depth of the receiving groove (203) gradually increases from top to bottom, and the groove depth value at the bottom of the receiving groove (203) is greater than the thickness value of the shear nail (3).

6. A brine well side-drilling window drilling device according to claim 5, characterized in that: The longitudinal length of the contact surface between the shear pins (3) and the window opening structure (1) and the deflection structure (2) is greater than the transverse length.

7. The brine well side-drilling window drilling device according to claim 1, characterized in that: The window opening structure (1) comprises a drill rod (102) and a window opening milling cone (101) installed at the end of the drill rod (102), and the shear nail (3) is connected to the window opening milling cone (101).

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