Positioning cutting device

Abstract

The utility model discloses a positioning cutting device, which belongs to the technical field of petroleum drilling engineering, and comprises a base, a fixed seat is fixed at the bottom in the base, a limiting component is arranged above the fixed seat, slideways are respectively arranged on two sides of the base, the limiting component is connected in the slideways in a sliding manner, the limiting component comprises a positioning plate, and the positioning plate is fixed on the base. And a through hole is formed in the positioning plate. According to the positioning and cutting device, after the required size of the centralizer is determined, the distance between the mandrel and the positioning plate is adjusted by unscrewing the two fastening screws and moving the positioning plate, a single wing on the centralizer can penetrate through a through hole in the positioning plate, then cutting is conducted along the surface of the top of the positioning plate, and after one wing is cut, the centralizer is fixed through the positioning plate. Cutting work of the other three wings can be rapidly completed only by changing the deflection angle of the centering device, the centering device can be suitable for auxiliary cutting of various centering devices by changing the distance between the positioning plate and the mandrel, and the cutting precision is improved while the working intensity is relieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of petroleum drilling engineering, in particular to a positioning cutting device. Background Art

[0002] During the drilling process, especially in the drilling of complex wells such as horizontal wells, extended reach wells and branch wells, the well site personnel need to know various downhole parameters in real time, which are completed by the measurement while drilling (MWD) and logging while drilling (LWD) systems. The measurement while drilling and logging while drilling systems are composed of a downhole controller, various downhole parameter measuring instruments, a measurement while drilling information transmission system and a ground information receiving, processing and display system.

[0003] As the depth of the oil field continues to increase, the complexity of the formation is gradually increasing. During the drilling process, the impact of mud on the downhole parameter measuring instruments is getting bigger and bigger. In order to minimize the impact of mud impact on the downhole parameter measuring instruments, each logging instrument assembly is equipped with a centralizer. The centralizer is connected in series in the measuring instrument string, which greatly reduces the impact force transmitted to the logging instrument. In actual use, in order to meet the needs of drill collar water holes of different sizes, the four-wing centralizer adopts a residual design scheme during manufacturing. The centralizer is cut by the drilling site personnel before the instrument is lowered into the well. Due to the limitations of the drilling site environment and equipment, the sizes of the four-wing centralizers cut by the site personnel are quite different, and the ideal design goals cannot be achieved during use. In order to reduce the labor intensity of the site personnel and improve the use effect of the centralizer, a positioning cutting device is designed to solve the above problems. Utility Model Content

[0004] In order to overcome the above-mentioned defects, the utility model provides a positioning and cutting device, which solves the problem that in order to meet the needs of drill collar water holes of different sizes during actual use, the four-wing centralizer adopts a margin design scheme during manufacturing, and the centralizer is cut by the drilling site personnel before the instrument is lowered into the well. Due to the limitations of the drilling site environment and equipment, the sizes of the four-wing centralizers cut by the site personnel vary greatly.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a positioning cutting device, comprising a base, a fixed seat is fixed at the bottom of the base, a limit assembly is provided above the fixed seat, slideways are respectively provided on both sides of the base, the limit assembly is slidably connected in the slideways, the limit assembly comprises a positioning plate, a through hole is provided on the positioning plate, fastening screws are respectively installed on both sides of the positioning plate, and a plurality of positioning grooves are respectively provided on the base at the positions corresponding to the two fastening screws.

[0006] The fastening screw is clamped in one of the positioning grooves, a placement hole is opened in the middle of the fixing seat, a core shaft is arranged in the placement hole, one end of the core shaft is fixed to one side of the inner wall of the base, an adjustment component is arranged in the core shaft, and three support components are arranged outside the adjustment component.

[0007] As a further solution of the utility model: through holes are respectively opened on both sides of the inner wall of the placement hole, and the through holes correspond to the opening above the fixing seat.

[0008] As a further solution of the utility model: the adjustment assembly includes a bidirectional screw rod, the bidirectional screw rod is installed in the core shaft through two bearings, and one end of the bidirectional screw rod passes through the core shaft and is fixed with a turning handle.

[0009] As a further solution of the utility model: nuts are respectively threadedly connected to two sides of the bidirectional screw rod, and the ends of the support assembly are fixed on the two nuts.

[0010] As a further solution of the utility model: the support assembly includes a pressure plate, which is arc-shaped and has anti-slip grooves on the outer wall. The inner wall of the pressure plate is hinged with a connecting rod through a pin, and the other end of the connecting rod is hinged on a nut through a pin.

[0011] As a further solution of the utility model: sliding holes are respectively opened at positions of the outer wall of the core shaft corresponding to the connecting rods, and the connecting rods penetrate and slide in the sliding holes.

[0012] Compared with the prior art, the beneficial effects of the utility model are: 1. The positioning and cutting device can position the four-wing centralizer by pushing the four-wing centralizer outside the core shaft and operating the adjustment assembly so that the three support assemblies support the inner wall of the centralizer. At this time, one wing at the top of the centralizer can pass through the opening at the top of the fixed seat. After determining the required size of the centralizer, the positioning plate can slide in the base by loosening the two fastening screws, thereby adjusting the distance between the core shaft and the positioning plate, and the single wing on the centralizer can pass through the through hole on the positioning plate, and then cutting is performed along the surface of the top of the positioning plate. After cutting one wing, it is only necessary to change the deflection angle of the centralizer to quickly complete the cutting of the other three wings. By changing the spacing between the positioning plate and the core shaft, it can be suitable for auxiliary cutting of various centralizers, reducing work intensity while improving cutting accuracy.

[0013] 2. The positioning and cutting device drives the bidirectional screw to rotate by turning the handle. During the rotation of the bidirectional screw, the two nuts can move closer to or farther away from each other. Since the two ends of the connecting rod are respectively hinged to the nut and the pressure plate through the pin shaft, the nut drives the connecting rod to deflect, so that the three pressure plates can move away from or closer to each other. Therefore, the positioning work of the stabilizers of different specifications can be satisfied by changing the position of the pressure plate, and it can ensure that the stabilizer is always in the center of the placement hole, which greatly improves the convenience of operation and makes the cutting device widely used. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0015] Figure 2 It is a structural schematic diagram of the core shaft and the adjustment component of the utility model.

[0016] Figure 3 It is a schematic diagram of the structure of the adjusting component and the supporting component of the utility model.

[0017] Figure 4 It is a structural schematic diagram of the mandrel of the utility model.

[0018] Figure 5 It is a structural schematic diagram of the limit assembly of the utility model.

[0019] In the figure: 1. base; 2. fixing seat; 3. limit assembly; 301. positioning plate; 302. through hole; 303. fastening screw; 4. slideway; 5. positioning groove; 6. placement hole; 7. core shaft; 8. adjustment assembly; 801. bidirectional screw rod; 802. nut; 803. turning handle; 9. support assembly; 901. pressure plate; 902. connecting rod; 10. sliding hole; 11. through hole. DETAILED DESCRIPTION

[0020] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0021] like Figure 1-5 As shown, the utility model provides a technical solution: a positioning and cutting device, including a base 1, a fixed seat 2 is fixed at the bottom of the base 1, a limit assembly 3 is provided above the fixed seat 2, slideways 4 are respectively provided on both sides of the base 1, the limit assembly 3 is slidably connected in the slideway 4, and the limit assembly 3 includes a positioning plate 301. Because the slideway 4 is provided, the slideway 4 plays a role of supporting and limiting the positioning plate 301, ensuring the stable vertical sliding of the positioning plate 301, and improving the stability of the positioning plate 301 in auxiliary cutting of the stabilizer.

[0022] A through hole 302 is formed on the positioning plate 301 , and fastening screws 303 are respectively installed on both sides of the positioning plate 301 . A plurality of positioning grooves 5 are respectively formed on the base 1 at positions corresponding to the two fastening screws 303 .

[0023] The fastening screw 303 is clamped in one of the positioning grooves 5, a placement hole 6 is opened in the middle of the fixing seat 2, and through holes 11 are opened on both sides of the inner wall of the placement hole 6. The through hole 302 corresponds to the opening above the fixing seat 2. Due to the through hole 11 and the opening above the fixing seat 2, the four wings of the stabilizer can be erected.

[0024] A core shaft 7 is provided in the placement hole 6, one end of the core shaft 7 is fixed to one side of the inner wall of the base 1, an adjustment component 8 is provided in the core shaft 7, the adjustment component 8 includes a bidirectional screw rod 801, the bidirectional screw rod 801 is installed in the core shaft 7 through two bearings, and one end of the bidirectional screw rod 801 passes through the core shaft 7 and is fixed with a turning handle 803.

[0025] Nuts 802 are threadedly connected on both sides of the bidirectional screw rod 801, and the ends of the support assembly 9 are fixed on the two nuts 802. Through the mutual cooperation between the nuts 802 and the bidirectional screw rod 801, the two nuts 802 can move synchronously during the rotation of the bidirectional screw rod 801, thereby improving the stability of the connection rod 902 on the nut 802 driving the pressure plate 901 to move.

[0026] The adjustment component 8 is provided with three support components 9 outside. The support component 9 includes a pressure plate 901. The pressure plate 901 is arc-shaped and has anti-slip grooves on the outer wall. The inner wall of the pressure plate 901 is hinged with a connecting rod 902 through a pin. The other end of the connecting rod 902 is hinged to the nut 802 through a pin. Since the outer wall of the pressure plate 901 is arc-shaped, the fit between the pressure plate 901 and the inner wall of the stabilizer is improved, the contact area is increased, and the stability of the positioning of the stabilizer is improved.

[0027] Sliding holes 10 are respectively opened on the outer wall of the core shaft 7 at the position corresponding to the connecting rod 902, and the connecting rod 902 slides through the sliding holes 10. Due to the provision of the sliding holes 10, the sliding holes 10 serve to limit the connecting rod 902, preventing the connecting rod 902 from deflecting during the movement, thereby ensuring that the connecting rod 902 stably supports the pressure plate 901.

[0028] The working principle of the utility model is as follows: when in use, the four-wing centralizer is pushed outside the core shaft 7, and the turning handle 803 is turned to drive the bidirectional screw rod 801 to rotate. During the rotation of the bidirectional screw rod 801, the two nuts 802 can approach each other, and the nuts 802 drive the connecting rod 902 to deflect, so that the two opposite connecting rods 902 can support the pressure plate 901, and the three pressure plates 901 are away from each other and support the inner wall of the centralizer. At this time, the four wings of the centralizer are respectively located at the upper and lower sides of the fixing seat 2 After the required size of the centralizer is determined, the two fastening screws 303 are loosened to allow the positioning plate 301 to slide freely, and the distance between the core shaft 7 and the positioning plate 301 is adjusted, and the single wing on the centralizer can pass through the through hole 302 on the positioning plate 301. Then, cutting is performed along the surface of the top of the positioning plate 301. After cutting one wing, the deflection angle of the centralizer is adjusted to allow the uncut wing to pass through the through hole 302 for further cutting. Similarly, the cutting work of multiple wings can be completed.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0030] The above describes in detail the preferred implementation of this patent, but this patent is not limited to the above implementation. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A positioning and cutting device, comprising a base (1), characterized in that: A fixing seat (2) is fixed at the bottom of the base (1), a limiting assembly (3) is provided above the fixing seat (2), slideways (4) are respectively provided on both sides of the base (1), the limiting assembly (3) is slidably connected in the slideways (4), the limiting assembly (3) comprises a positioning plate (301), a through hole (302) is provided on the positioning plate (301), fastening screws (303) are respectively installed on both sides of the positioning plate (301), and a plurality of positioning grooves (5) are respectively provided on the base (1) at positions corresponding to the two fastening screws (303); The fastening screw (303) is clamped in one of the positioning grooves (5); a placement hole (6) is provided in the middle of the fixing seat (2); a core shaft (7) is provided in the placement hole (6); one end of the core shaft (7) is fixed to one side of the inner wall of the base (1); an adjustment component (8) is provided in the core shaft (7); and three support components (9) are provided outside the adjustment component (8).

2. A positioning and cutting device according to claim 1, characterized in that: The inner wall of the placement hole (6) is provided with through holes (11) on both sides, and the through hole (302) corresponds to the opening above the fixing seat (2).

3. A positioning and cutting device according to claim 1, characterized in that: The adjustment assembly (8) comprises a bidirectional screw rod (801), the bidirectional screw rod (801) being mounted in the core shaft (7) via two bearings, and one end of the bidirectional screw rod (801) passes through the core shaft (7) and is fixed with a turning handle (803).

4. A positioning and cutting device according to claim 3, characterized in that: Nuts (802) are respectively threadedly connected on two sides of the bidirectional screw rod (801), and ends of the support assembly (9) are fixed on the two nuts (802).

5. A positioning and cutting device according to claim 4, characterized in that: The support assembly (9) comprises a pressing plate (901), the pressing plate (901) is of arc-shaped design and has anti-slip grooves on its outer wall, the inner wall of the pressing plate (901) is hinged with a connecting rod (902) via a pin, and the other end of the connecting rod (902) is hinged on a nut (802) via a pin.

6. A positioning and cutting device according to claim 5, characterized in that: Sliding holes (10) are respectively provided on the outer wall of the core shaft (7) at positions corresponding to the connecting rods (902), and the connecting rods (902) penetrate and slide in the sliding holes (10).

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