[0053] Example one
[0054] figure 1 A cross-sectional view of the drill bit provided in this example, figure 2 for figure 1 In the cross-sectional view of A-A, image 3 A first bottom surface structure of the drill bit provided in this embodiment, Figure 4 A second bottom surface structure of the drill bit provided in this embodiment, the combination of the following Figure 1 ~ 4 Specifically, the specific embodiment of the present embodiment will be specifically described.
[0055] This embodiment provides a drill bit, including a drill body 100, a swirling nozzle 200, and a plurality of radial nozzles 300, a mainstream passage 101 having a liquid flow flow in a drill bore body 100, and a plurality of radial nozzle 300 along the drill body 100. The circumferential direction is disposed in the outer edge of the drill body 100, and the radial nozzle 300 is in communication with the main runway 101, and the plurality of radial nozzles 300 are injective in a plurality of tangential direction of the same circle, and the swirl nozzle 200 is in communication with the main runner 101. The swirl nozzle 200 is eccentricly disposed at the bottom of the drill body 100.
[0056] Specifically, the drill body 100 may be any suitable shape and structure, and may, for example, be a cylindrical shape, or a circular stage, of course, may also be other suitable shapes suitable for use within the tube. Preferably, the drill body 100 is a cylindrical shape, and the cylindrical drill body 100 is smaller when rotating around the central axis, thereby making the drill body 100 with a faster rotational speed.
[0057] The mainstream passage 101 having a liquid flow is formed in the drill body 100, the shape and structure of the main flow channel 101, the present embodiment does not specifically define, such as the cross section of the main runway 101 may be circular, or may be elliptical, mainstream The road 101 can be an isometric flow, or may vary the flow channel, in one example, such as figure 1 As shown, the mainstream is composed of two towers, the diameter of the first trine near the drill body 100 is greater than the diameter of the second region away from the drill body 100 into the liquid port. The mainstream 101 can be disposed coaxially with the drill body 100, or may be a non-concealed setting.
[0058] The swirl nozzle 200 is in communication with the main runway 100. The swirl nozzle 200 provided in this embodiment may be any suitable shape and structure, and may be, for example, a cylindrical shape or image 3 The inner wall of the swirl nozzle may be a cylindrical shape or a conical shape may be a cylindrical shape.
[0059] In one example, such as figure 1 As shown, the mainstream passage 101 is inserted with the drill body 100, and the swirl nozzle 200 communicates with the main flow channel 101 by the first communication passage 102, and the first communication passage 102 includes a first connection section and a second linkage section, the first connection section. Vertical is parallel to the main runway 101 perpendicular to the main runner 101. The liquid nozzle 200 can be located figure 1 In the second connection section shown, that is, the swirl nozzle is located inside the second linkage; or the liquid opening of the swirl nozzle 200 can also be located outside the second communication section, that is, part of the swirl nozzle 200 is located in the second communication. During the paragraph; the swirl nozzle 200 is fixed to the second linkage section, for example by a threaded connection, or can also be passed.
[0060] In this example, the eccentric setting of the swirl nozzle 200 is realized by the first connection section and the second connection section. Of course, the structure of the first communication passage 102 is not limited to the structure provided in the present embodiment, for example, the first communication passage 102 may also be a linear conduit, between the central axis of the first communication passage 102 and the central axis of the main track 101 having a clip. The angle is less than 90 °, and may be 30 °, or may be 20 °.
[0061] In another example, the mainstream 101 is not coaxially disposed with the drill body 100, that is, the main runway 101 itself is provided in the drill body 100, and can be mounted directly in the mainstream channel.
[0062] The swirl nozzle 200 provided in this embodiment can be image 3 1 shown, or may be multiple, for example, 3, or may be 5. Alternatively, when the swirl nozzle 200 is plural, the swirl nozzle 200 can be uniformly disposed about the axis of the drill body 100, for example Figure 4 When the swirl nozzle 200 is 3, the center of the triangle formed by the three swirl nozzles 200 is located on the axis of the drill body 100; or when the swirl nozzle 200 is 4, four swirl nozzles 200 The center of the formed square is located on the axis of the drill body 100.
[0063] In the present embodiment, the plurality of radial nozzles 300 are disposed along the outer edge of the drill body 100 along the circumferential direction of the drill body 100. The main runway 101 extends in its radial direction to form a plurality of second communication passages 104, and the plurality of radial nozzles 300 passes figure 2 The plurality of second communication passages 104 shown are in communication with the main runway 101, and the axis of the second communication passage 104 is 90 ° angle to the axis of the radial nozzle 300 such that the radial nozzle 300 is ejected in the tangent direction of the circle The drill body 100 is rotated.
[0064] Specifically, the radial nozzle 300 can be any suitable shape, and may be, for example, a cylindrical shape, or may be a square column shape, and the inner wall of the radial nozzle can be formed. figure 2 The cone shown, or may also form a cylindrical shape, the structure of the radial nozzle 300 is not specifically defined, as long as the injection function can be realized.
[0065] In one example, the drill body 100 is a cylindrical shape, and in the side wall of the drill body 100 is formed along the circumferential direction. figure 2 The plurality of sector recess 103 mounted in the radial head 300. The length of the sector groove 103 is not specifically defined, which can extend along the axial direction of the drill body 100 to the bottom surface of the drill body 100, or may extend along the axial direction of the drill body 100 to the bottom surface of the drill body body 100. In a specific example, if figure 2 As shown, the radial nozzle 300 is inserted within the side wall of the sector groove 103, and the radial nozzle 300 is in the same plane and the side wall of the sector groove 103 is located at the same plane; in another example, the radial nozzle 300 is located Inside the sector groove 103, the inlet port of the radial nozzle 300 is fixed to the side wall of the sector groove 103.
[0066] In another example, the radial nozzle 300 further includes a right angle elbow, one end of the right angle elbow fixed to the radial nozzle 300, the other end of the right angle elbow is fixed within the second communication passage 104, radial nozzle 300 A right angle elbow is in communication with the second communication passage 104 such that the radial nozzle 300 is ejected in the tangent direction.
[0067] The plurality of radial nozzles 300 provided in this embodiment can be uniformly disposed along the outer edge of the drill body 100, for example, when the radial nozzle 300 is 3, the second communication passage 104 cooperated with the radial nozzle 300 is also 3 And the angle between the three second communication channels is 120 °; for example, when the radial nozzle 300 is 4, such as figure 2 As shown, the angle between the second communication passages 104 mounted in the radial nozzle 300 is 90 °.
[0068] Here is the mode of operation of the drill bit provided by the present embodiment:
[0069] The drilling apparatus is incorporated into the vicinity of the gray sand consolidation layer, and the high-speed drilling fluid is injected into the tube, and the drilling fluid injected from the plurality of radial nozzles is injected in the tangential direction of the same circle to drive the drill body wind around the central axis. The drilling fluid emitted by the eccentric set of swirling nozzles form a tapered, and the drill body is rotated while rotating, and the tapered drilling fluid is rotated about the central axis of the drill bit, thereby covering the jug of the sleeve of the jacket. Further, the obstruction from the cross section is cleaned. As the drill body is continuously decentralized, the cone drilling fluid is cleaned out of the sleeve, and the drilling fluid ejected from the radial nozzle is further further. Clean the closing objects near the wall to complete the entire cleaning process.
[0070] The drill bit provided in this embodiment is inserted by providing an eccentric swirl nozzle at the bottom of the drill body and the swirling nozzle and the main flow in the drill body, and the outer side of the drill body is provided in the circumferential direction and radial nozzle and radial direction The nozzle is in communication with the main flow, and the plurality of radial nozzles are ejected in a plurality of tangential directions of the same circle, thereby driving the drill bit to rotate, so that the spray range of the drill bit covers the entire cross section of the sleeve, that is, from a swirling nozzle injection The injection surface formed by the liquid can be covered by all the casing cross section, so the drill bit provided in this example can clean all the closures in the sleeve, and does not affect the inner diameter of the sleeve, thereby making the wells produced normally.