Petroleum drilling reaming device

Abstract

The utility model belongs to the technical field of oil exploitation, and particularly relates to an oil drilling reaming device which comprises a drilling pipe, a plurality of grooves are evenly formed in the side wall of the drilling pipe, two through grooves are formed in the side walls of the grooves in an up-and-down symmetry mode, two movable plates are arranged in each groove, the side walls of the opposite sides of the movable plates are hinged, and the through grooves are formed in the through grooves. A plurality of cutters are fixedly connected to the side walls of the movable plates, connecting plates are movably connected to the side walls of the sides, away from each other, of the movable plates, the connecting plates extend to an inner cavity of the drilling pipe, a threaded rod is rotationally connected to the inner cavity of the drilling pipe, threads on the side wall of the threaded rod are oppositely arranged in a vertically symmetrical mode, and two threaded sleeves are connected to the side wall of the threaded rod in a threaded mode; and the connecting plates are fixedly connected with the threaded sleeve. The cutter can stretch out in a triangular form, so that the cutter is stressed in a balanced manner, the stability is good, and the problems of damage and deformation in the reaming process are reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of oil extraction, and specifically relates to an oil drilling reaming device. Background Technique

[0002] Drilling reaming is a process of expanding the diameter of the wellbore to be larger than the original drilling hole diameter during the drilling process. This process is usually carried out in the later stage of drilling to meet further operation requirements, such as installing larger casing pipes, or providing space for specific formation testing and oil production equipment.

[0003] Currently, the general methods for reaming are usually to use reamers, special drill bits or dual-tube drilling techniques, etc. The reamer is used more frequently and can be directly installed on the drill string for use; however, in the existing reamers, the cutting tools generally extend from the drill string to expand the diameter of the wellbore. Although the purpose of reaming can be achieved, many cutting tools are arranged vertically or obliquely. Coupled with the complex underground geological conditions, the above-mentioned arrangement methods are prone to uneven stress, resulting in deformation and damage, reducing the reaming effect. Content of the Utility Model

[0004] The purpose of this utility model is to provide an oil drilling reaming device that can extend the cutting tools in the form of a triangle, making the stress balanced, with good stability, and reducing the problems of damage and deformation during reaming.

[0005] The technical solution adopted by this utility model is specifically as follows:

[0006] An oil drilling reaming device includes a drill pipe. A number of grooves are evenly opened on the side wall of the drill pipe. Two through grooves are symmetrically opened on the upper and lower sides of the side wall of the groove. Two movable plates are arranged in each groove. The opposite side walls of the movable plates are hinged. A number of cutting tools are fixedly connected to the side walls of the movable plates. The opposite side walls of the movable plates are movably connected to connecting plates. The connecting plates extend into the inner cavity of the drill pipe. A screw rod is rotatably connected to the inner cavity of the drill pipe. The threads on the side wall of the screw rod are symmetrically arranged in the opposite direction up and down. Two screw sleeves are threadedly connected to the side wall of the screw rod. The connecting plates are fixedly connected to the screw sleeves. A transmission component is arranged at the top of the screw rod. A counterweight is arranged in the inner cavity of the drill pipe.

[0007] The transmission component includes a first bevel gear fixedly connected to the top of the screw rod. A second bevel gear is meshed with the side wall of the first bevel gear. A rotating shaft is fixedly connected to the side wall of the second bevel gear. The rotating shaft is rotatably connected to the inner wall of the drill pipe. The other end of the rotating shaft is fixedly connected to a circular gear. A rack is combined with the rear side of the circular gear. A pressing plate is fixedly connected to the top of the rack. The counterweight is located above the pressing plate. A rebound component is arranged on the bottom surface of the pressing plate.

[0008] The rebound assembly is fixedly connected to the vertical rod on the bottom surface of the pressing plate. A limiting plate is fixedly connected to the inner wall of the drill pipe. The bottom end of the vertical rod penetrates through the limiting plate and is movably connected thereto. A spring is sleeved on the side wall of the vertical rod between the pressing plate and the limiting plate.

[0009] A steel wire is fixedly connected to the top surface of the counterweight.

[0010] Protective pads are fixedly connected to the side walls of the through grooves, and the other ends of the protective pads are fixedly connected to the connecting plate.

[0011] Protrusions are fixedly connected to the side walls of the grooves, and the protrusions are trapezoidally arranged.

[0012] The technical effects achieved by this utility model are as follows:

[0013] Through the mutual cooperation among the drill pipe, the movable plate, the cutter, the screw rod, the counterweight, and the transmission assembly, etc., in the process of expansion, the counterweight can be directly controlled to fall through the steel wire, and the cutter can be pushed out by the gravity of the counterweight to realize the reaming treatment of the wellbore. Moreover, the two-side cutters are arranged in a triangular pattern, which can effectively improve the stability during expansion and reduce the probability of deformation and damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a perspective view of an embodiment of this utility model;

[0015] Figure 2 is a schematic cross-sectional structure view of an embodiment of this utility model;

[0016] Figure 3 is a schematic structure view of the movable plate of an embodiment of this utility model;

[0017] Figure 4 is an enlarged view at A in an embodiment of this utility model Figure 2 ;

[0018] Figure 5 is an enlarged view at B in an embodiment of this utility model Figure 2 ;

[0019] In the drawings, the list of components represented by each reference numeral is as follows:

[0020] 1, drill pipe; 2, groove; 3, through groove; 4, movable plate; 5, cutter; 6, connecting plate; 7, screw sleeve; 8, screw rod; 9, first bevel gear; 10, second bevel gear; 11, rotating shaft; 12, circular gear; 13, rack; 14, pressing plate; 15, vertical rod; 16, spring; 17, limiting plate; 18, counterweight; 19, steel wire; 20, protective pad; 21, protrusion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the purpose and advantages of this utility model clearer and more understandable, the following specifically describes this utility model in combination with embodiments. It should be understood that the following text only describes one or several specific implementation manners of this utility model, and does not strictly limit the scope of protection of the specific claims of this utility model.

[0022] As Figures 1 - 5 shown, an oil drilling reaming device includes a drill pipe 1. A plurality of grooves 2 are evenly formed in the side wall of the drill pipe 1. Two through grooves 3 are symmetrically formed in the upper and lower sides of the side wall of the groove 2. Two movable plates 4 are arranged in each groove 2. One side walls of the movable plates 4 are hinged. A plurality of cutters 5 are fixedly connected to the side walls of the movable plates 4. Connecting plates 6 are movably connected to the side walls of the movable plates 4 away from each other. The connecting plates 6 extend into the inner cavity of the drill pipe 1. A screw rod 8 is rotatably connected to the inner cavity of the drill pipe 1. The threads on the side wall of the screw rod 8 are symmetrically arranged in the opposite direction up and down. Two nuts 7 are threadedly connected to the side wall of the screw rod 8. The connecting plates 6 are fixedly connected to the nuts 7. A transmission assembly is arranged at the top end of the screw rod 8. A counterweight 18 is arranged in the inner cavity of the drill pipe 1. A steel wire 19 is fixedly connected to the top surface of the counterweight 18.

[0023] Among them, the weight of the counterweight 18 can be selected according to the pressure in the drill pipe 1. In the initial state, the counterweight 18 can be pulled by the steel wire 19. One end of the steel wire 19 can extend outside the drill pipe 1 or be connected to an external control facility to realize the control of the counterweight 18. Due to the gravity of the counterweight 18, there will be no shaking or instability during the reaming process.

[0024] As Figure 2 and Figure 5 shown, the transmission assembly includes a first bevel gear 9 fixedly connected to the top end of the screw rod 8. A second bevel gear 10 is meshed with the side wall of the first bevel gear 9. A rotating shaft 11 is fixedly connected to the side wall of the second bevel gear 10. The rotating shaft 11 is rotatably connected to the inner wall of the drill pipe 1. A circular gear 12 is fixedly connected to the other end of the rotating shaft 11. A rack 13 is combined with the rear side of the circular gear 12. A pressing plate 14 is fixedly connected to the top end of the rack 13. The counterweight 18 is located above the pressing plate 14. A spring-back assembly is arranged on the bottom surface of the pressing plate 14.

[0025] Specifically, by adopting gravity as the driving method, it solves the problems that traditional methods need to use electric facilities as the driving, which are prone to damage and short circuits, and the drawn wires also need to be protected separately, with poor practicability.

[0026] As Figure 2 and Figure 5As shown in the figure, the rebounding component is fixedly connected to the vertical rod 15 on the bottom surface of the pressing plate 14. A limiting plate 17 is fixedly connected to the inner wall of the drill pipe 1. The bottom end of the vertical rod 15 penetrates through the limiting plate 17 and is movably connected thereto. A spring 16 is sleeved on the side wall of the vertical rod 15 between the pressing plate 14 and the limiting plate 17. By providing the rebounding component, when the counterweight 18 is taken out, the spring 16 can be used to reset the cutting tool 5, achieving the purpose of conveniently retracting the cutting tool 5.

[0027] As Figure 4 shown in the figure, protective pads 20 are fixedly connected to the side walls of the through grooves 3, and the other ends of the protective pads 20 are fixedly connected to the connecting plate 6. During the expansion process, it can effectively prevent the gravel particles in the wellbore from entering the inside of the drill pipe 1, playing a role of shielding and preventing the particles from jamming other structures such as the screw rod 8.

[0028] As Figure 2 shown in the figure, convex blocks 21 are fixedly connected to the side walls of the grooves 2, and the convex blocks 21 are trapezoid-shaped. The convex blocks 21 are used to shield the two side movable plates 4, so that the movable plates 4 are in a slightly outwardly inclined state in the initial state, facilitating rapid deformation when driven by the screw rod 8.

[0029] The working principle of this utility model is as follows: When it is necessary to extend the cutting tool 5 for reaming, first loosen the steel wire 19 so that the counterweight 18 presses on the pressing plate 14. The gravity of the counterweight 18 drives the rack 13 to move downward, and at the same time the spring 16 is compressed. The circular rack 13 meshes with the circular gear 12 to drive the rotating shaft 11 to rotate. The rotating shaft 11 drives the second bevel gear 10 to rotate. The second bevel gear 10 meshes with the first bevel gear 9 to drive the screw rod 8 to rotate. The screw rod 8 drives the relative movement of the screw sleeve 7. The screw rod 8 moves relative to the connecting plate 6, so that the movable plates 4 open in an isosceles triangle and extend outward to ream the wellbore. And the two side cutting tools 5 are distributed in a triangle, having good stability and not being easily deformed and damaged.

[0030] The above is only the preferred embodiment of this utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of this utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of this utility model. The structures, devices and operation methods not specifically described and explained in this utility model, without special instructions and limitations, are implemented according to the conventional means in this field.

Claims

1. An oil drilling reaming device, characterized in that: It includes a drill pipe (1), several grooves (2) are evenly formed on the side wall of the drill pipe (1), two through grooves (3) are symmetrically formed on the upper and lower sides of the side wall of the groove (2), two movable plates (4) are arranged in each groove (2), one side wall of the opposite sides of the movable plates (4) is hinged, several cutters (5) are fixedly connected to the side walls of the movable plates (4), connecting plates (6) are movably connected to the side walls of the movable plates (4) far away from each other, the connecting plates (6) extend into the inner cavity of the drill pipe (1), a screw rod (8) is rotatably connected to the inner cavity of the drill pipe (1), the threads on the side wall of the screw rod (8) are symmetrically arranged in opposite directions up and down, two screw sleeves (7) are threadedly connected to the side wall of the screw rod (8), the connecting plates (6) are fixedly connected to the screw sleeves (7), a transmission assembly is arranged at the top end of the screw rod (8), and a counterweight block (18) is arranged in the inner cavity of the drill pipe (1).

2. The oil drilling reaming device according to claim 1, characterized in that: The transmission assembly includes a first bevel gear (9) fixedly connected to the top end of the screw rod (8), a second bevel gear (10) is meshed with the side wall of the first bevel gear (9), a rotating shaft (11) is fixedly connected to the side wall of the second bevel gear (10), the rotating shaft (11) is rotatably connected to the inner wall of the drill pipe (1), a circular gear (12) is fixedly connected to the other end of the rotating shaft (11), a rack (13) is combined with the rear side of the circular gear (12), a pressing plate (14) is fixedly connected to the top end of the rack (13), the counterweight block (18) is located above the pressing plate (14), and a rebound assembly is arranged on the bottom surface of the pressing plate (14).

3. The oil drilling reaming device according to claim 2, wherein: The rebound assembly is a vertical rod (15) fixedly connected to the bottom surface of the pressing plate (14), a limiting plate (17) is fixedly connected to the inner wall of the drill pipe (1), the bottom end of the vertical rod (15) penetrates through the limiting plate (17) and is movably connected to the limiting plate (17), and a spring (16) is sleeved on the side wall of the vertical rod (15) between the pressing plate (14) and the limiting plate (17).

4. The hole enlarging device for oil drilling according to claim 1, characterized in that: A steel wire (19) is fixedly connected to the top surface of the counterweight block (18).

5. The reaming device for oil drilling according to claim 1, characterized in that: Protective pads (20) are fixedly connected to the side walls of the through grooves (3), and the other ends of the protective pads (20) are fixedly connected to the connecting plates (6).

6. The oil drilling reaming device according to claim 1, characterized in that: Protrusions (21) are fixedly connected to the side walls of the grooves (2), and the protrusions (21) are trapezoid-shaped.

Images