Wellbore guide deflecting tool with controllable hole drift angle

Abstract

The utility model discloses a shaft guide deflecting tool with a controllable hole drift angle. The shaft guide deflecting tool is mainly composed of a shell, a motor, a threaded rod, a pull sleeve, a pull rod, a sliding groove crank and a steering cylinder. The motor is installed in a circular groove in the top of the shell and connected with the pull sleeve through a threaded rod, the pull sleeve is installed in an annular groove in the shell and connected with the two pull rods through pins I on the two sides, and the sliding groove crank is connected with the pull sleeve through the pull rods and installed between the steering cylinder and a baffle at the lower end of the shell through a pin shaft II. Pins II on the two sides of the steering cylinder are matched with sliding grooves in the lower ends of the sliding groove cranks. Rotation of the threaded rod is controlled by controlling the motor, rotation of the steering cylinder can be limited by changing the rotation angle of the sliding groove crank, and therefore control over the deflecting angle is achieved, the problem that a common deflecting tool can only conduct fixed-angle deflecting in the deflecting process is solved, and the deflecting tool further has the advantages of being simple in structure, reliable in performance and the like and is suitable for popularization and application. The method is especially suitable for horizontal well deflecting.

Description

Technical Field

[0001] The utility model relates to the field of deep-sea oil and gas and natural gas hydrate mining equipment, in particular to a wellbore guiding and deflecting tool capable of controlling the well inclination angle. Background Art

[0002] As one of the important technologies for oil exploration, directional drilling technology has been deeply studied and practiced. The so-called directional drilling is to control the drill bit to drill through the rock according to the designed track or geological guidance, and strive to drill safely and efficiently to the predetermined target underground. It is one of the indispensable main technologies for the efficient and green development of modern oil and gas fields. Through directional drilling, the development control radius of oil and gas fields can be effectively expanded based on the same operating platform. This is conducive to improving the economic benefits and mining efficiency of oil and gas fields, as well as reducing drilling costs, protecting the environment, and saving operating sites. Having a reliable deflection tool is very beneficial for directional drilling for the efficient development of deep-sea shallow oil and gas and natural gas hydrate resources.

[0003] However, existing wellbore guidance or pre-curved inclination tools can only perform inclination at a fixed angle, lack the function of accurately controlling the inclination angle, and cannot meet the purpose of efficient exploitation of oil, gas and natural gas hydrate resources in shallow seabed layers through multi-branch wells and directional wells.

[0004] Therefore, it is necessary to design a wellbore inclination angle controllable wellbore guiding and deflecting tool to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide a wellbore guiding and inclination tool which can control the well inclination angle, so as to solve the problem that the existing general inclination tools proposed in the above background technology can only perform inclination at a fixed angle, lack the function of accurately controlling the inclination angle, and cannot meet the purpose of efficient exploitation of oil and gas resources.

[0006] To achieve the above purpose, the utility model provides the following technical solutions: a well inclination angle controllable wellbore guide and deflection tool, which is mainly composed of a housing, a motor, a threaded rod, a pull sleeve, a pull rod, a chute crank and a steering cylinder, wherein the motor is installed in a circular groove at the top of the upper end of the housing, and the lower end of the motor is fixedly connected to the threaded rod, the threaded rod is threadedly connected to the threaded hole at the top of the upper end of the pull sleeve, the pull sleeve is installed in an annular groove inside the housing, and the pull sleeve is connected to two pull rods through pins Ⅰ on the left and right sides, respectively, the through hole Ⅱ at the upper end of the chute crank is connected to the through hole Ⅰ at the lower end of the pull rod through a pin shaft Ⅰ, and the chute crank is installed between the steering cylinder and the baffle Ⅰ at the lower end of the housing through a pin shaft Ⅱ. The pins Ⅱ on both sides of the steering cylinder match the chute at the lower end of the chute crank.

[0007] The top of the upper end of the shell is provided with a circular groove, the middle and upper end of the interior is provided with an inner baffle, the two sides of the lower end are respectively provided with baffles I and II, and one side of the middle and upper end is provided with a through groove.

[0008] The lower end of the motor is fixedly connected to the threaded rod, and the motor can drive the threaded rod to rotate.

[0009] The pull sleeve is provided with steps on both sides of the middle part, a concave surface and a pin I are provided on both sides of the lower end, and a connecting rod and a vertical threaded hole are provided on the upper end, and the threaded hole is threadedly connected with the lower end of the threaded rod.

[0010] The upper end of the slide crank is provided with a circular concave surface and a through hole II, the middle part is provided with a circular through hole, and the lower end is provided with an arc-shaped slide, and the overall structure is in a broken line shape.

[0011] Pins II are arranged on both sides of the middle part of the steering cylinder.

[0012] The beneficial effects of the utility model are:

[0013] (1) The utility model can control the rotation of the threaded rod by controlling the motor, thereby driving the axial movement of the pull sleeve, and then pull the slide crank through the pull rod to change its rotation angle, thereby limiting the rotation of the steering cylinder, which can achieve precise control of the inclination angle and is beneficial to the efficient exploitation of underground oil and gas resources.

[0014] (2) The utility model can slide in the slide groove of the slide groove crank by setting pins on both sides of the middle part of the steering cylinder. During the whole deflection process, no force is directly applied to the steering cylinder. Instead, a limiting force is applied to the steering cylinder after it rotates under the action of the continuous oil pipe and the drill bit to stop the rotation, thereby achieving the purpose of deflection. Compared with directly controlling the rotation of the steering cylinder with a motor, the utility model has better controllability and longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the appearance diagram of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the initial state of the utility model;

[0017] Figure 3 It is a schematic diagram of the structure of the utility model when it is working;

[0018] Figure 4 This is a schematic diagram of the shell structure of the utility model;

[0019] Figure 5 It is the matching diagram between the motor and the threaded rod of the utility model;

[0020] Figure 6 This is the appearance diagram of the pull sleeve of the utility model;

[0021] Figure 7 This is the appearance diagram of the pull rod of the utility model;

[0022] Figure 8 This is the appearance diagram of the slide crank of the utility model;

[0023] Fig. 9 This is a schematic diagram of the structure of the steering cylinder of the utility model;

[0024] In the figure, 1-housing, 2-motor, 3-threaded rod, 4-pull sleeve, 5-pull rod, 6-slide crank, 7-steering cylinder, 8-pin shaft I, 9-pin shaft II, 10-coiled oil pipe and drill bit, 101-through groove, 102-circular groove, 103-inner baffle, 104-annular groove, 105-baffle I, 106-circular through hole, 107-rectangular through groove, 108-baffle II, 40 1-threaded hole, 402-connecting rod, 403-pin I, 404-step, 405-through groove, 406-concave surface, 501-through hole, 502-circular concave surface, 503-through hole I, 601-through hole II, 602-circular concave surface, 603-circular through hole, 604-slide groove, 701-circular hole, 702-pin II, 703-circular channel, 704-arc surface. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings, and the protection scope of the utility model is not limited to the following description:

[0026] like Figure 1-Figure 9 As shown, a well inclination angle controllable wellbore guide and deflection tool is mainly composed of a housing 1, a motor 2, a threaded rod 3, a pull sleeve 4, a pull rod 5, a chute crank 6 and a steering cylinder 7, wherein the motor 2 is installed in a circular groove 102 at the top of the upper end of the housing 1, and the lower end of the motor 2 is fixedly connected to the threaded rod 3, the threaded rod 3 is threadedly connected to the threaded hole 401 at the top of the upper end of the pull sleeve 4, the pull sleeve 4 is installed in an annular groove 104 inside the housing 1, and the pull sleeve 4 is respectively connected to the two pull rods 5 through the pins Ⅰ403 on the left and right sides, the through hole Ⅱ601 at the upper end of the chute crank 6 is connected to the through hole Ⅰ503 at the lower end of the pull rod 5 through the pin shaft Ⅰ8, and the chute crank 6 is installed between the steering cylinder 7 and the baffle Ⅰ105 at the lower end of the housing 1 through the pin shaft Ⅱ8, and the pins Ⅱ702 on both sides of the steering cylinder 7 match the chute 604 at the lower end of the chute crank 6;

[0027] A circular groove 102 is provided at the top of the upper end of the housing 1, and an inner baffle 103 is provided at the middle and upper end thereof, which can prevent external sand from invading the annular groove 104 inside the housing 1 and affecting the normal operation of the threaded rod 3. Baffles I 105 and baffles II 108 are provided on both sides of the lower end, respectively, and a through groove 101 is provided on one side of the middle and upper end, which can provide space for the coiled tubing to be bent when it is lowered;

[0028] The lower end of the motor 2 is fixedly connected to the threaded rod 3, and the motor 2 can drive the threaded rod 3 to rotate, which is conducive to more accurate control of the deflection angle;

[0029] Steps 404 are provided on both sides of the middle of the pull sleeve 4, concave surfaces 406 and pins Ⅰ 403 are provided on both sides of the lower end, and a connecting rod 402 and a vertical threaded hole 401 are provided on the upper end. The threaded hole 401 is threadedly connected to the lower end of the threaded rod 3, and the rotation of the threaded rod 3 can drive the pull sleeve 4 to move axially;

[0030] The upper end of the slide crank 6 is provided with a circular concave surface 602 and a through hole II 601, the middle is provided with a circular through hole 603, and the lower end is provided with an arc-shaped slide 604. The overall structure is in a broken line shape, so as to better control the rotation angle of the slide crank 6.

[0031] The working process of the present invention is as follows:

[0032] Initial state: Figure 2 , the pull sleeve 4 is at the uppermost position of the annular groove 104, and the steering cylinder 7 is vertically downward. The pins II 702 on both sides of the steering cylinder 7 are in the slide groove 604 of the slide groove crank 6, and the pins II 702 are close to one side edge of the slide groove 604, and the motor 2 is in a stopped state.

[0033] The process of setting the inclination angle: the motor 2 drives the threaded rod 3 to rotate, and the threaded rod 3 drives the pull sleeve 4 to move axially downward. At the same time, the pull rod 5 connected to the pull sleeve 4 pulls the slide crank 6 to rotate. When the slide crank 6 rotates to a certain angle, the motor 2 stops rotating, such as Figure 1 As shown in the middle right picture.

[0034] Deflection process: After the deflection angle is set, the coiled tubing and the drill bit 10 are lowered. Since the coiled tubing has the characteristics of flexibility, when the drill bit and the coiled tubing 10 are lowered into the steering cylinder 7, the coiled tubing bends and the steering cylinder begins to rotate. However, since the pins II 702 on both sides of the steering cylinder 7 are restricted by the slide groove 604 of the slide groove crank 6, the steering cylinder will stop rotating after rotating a certain angle, such as Figure 3 As shown, the forward direction of the drill bit has a certain deviation from the tool axis to achieve the purpose of deflection.

[0035] When the angle needs to be changed again to create inclination, just restore the device to its initial state and repeat the above steps.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that this patent can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A wellbore guiding and deflecting tool capable of controlling the well inclination angle, mainly comprising a housing (1), a motor (2), a threaded rod (3), a pull sleeve (4), a pull rod (5), a slide crank (6), a steering cylinder (7), a pin shaft I (8) and a pin shaft II (9), characterized in that: The upper top of the shell (1) is provided with a circular groove (102), the middle and upper end of the interior is provided with an inner baffle (103), the lower ends are provided with baffles I (105) and baffles II (108), and one side of the middle and upper end is provided with a through groove (101); the motor (2) is installed in the circular groove (102) at the upper top of the shell (1), and the lower end of the motor (2) is fixedly connected to the threaded rod (3); steps (404) are provided on both sides of the middle of the pull sleeve, concave surfaces (406) and pins I (403) are provided on both sides of the lower end, a connecting rod (402) and a vertical threaded hole (401) are provided at the upper end, the pull sleeve (4) is installed in the annular groove (104) inside the shell (1), and the pull sleeve (4) is connected to the two pull rods (5) through the pins I (403) on the left and right sides; the threaded rod (3) and the upper top of the pull sleeve (4) are connected to each other. The threaded hole (401) is threadedly connected; the upper end of the slide crank (6) is provided with a circular concave surface (602) and a through hole II (601), the middle part is provided with a circular through hole (603), and the lower end is provided with an arc-shaped slide (604). The overall structure is in a broken line shape. The slide crank (6) is installed between the steering cylinder (7) and the baffle I (105) at the lower end of the housing (1) through the pin II (9), and the upper end of the slide crank (6) The through hole II (601) is connected to the through hole I (503) at the lower end of the pull rod (5) through the pin shaft I (8); pins II (702) are provided on both sides of the middle part of the steering cylinder, and the steering cylinder is installed between the baffle I (105) and the baffle II (108) at the lower end of the shell through the pin shaft II (9), and the pins II (702) on both sides of the steering cylinder (7) cooperate with the slide groove (604) at the lower end of the slide groove crank (6).

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