Station switching mechanism for oil well coring

Abstract

The utility model relates to the field of oil exploration, in particular to a station switching mechanism for oil well coring, which comprises a shell, a logging and sampling power component used for drilling and sampling the side wall of an oil well is arranged on one side inside the shell, and a plurality of coring barrels arranged in an array mode are arranged on the lower side of the logging and sampling power component. A first clamping pin on a telescopic arm is clamped into a clamping groove, corresponding to the first clamping pin, in a coring barrel assembly, so that the coring barrel assembly moves towards one side along with the telescopic arm pushed by a hydraulic cylinder, and when a next coring barrel moves to the lower side of a logging sampling power assembly, a V-shaped inclined plane of a second clamping pin is pushed through an extrusion inclined plane on a guide rod; when the telescopic arm moves towards the other side, the coring cylinder assembly is prevented from moving along with the telescopic arm, and then switching of coring cylinders on the lower side of the whole logging sampling power assembly is completed.

Description

Technical Field

[0001] This utility model relates to the field of petroleum exploration, and in particular to a workstation switching mechanism for oil well coring. Background Technology

[0002] When drilling oil wells, it is necessary to drill holes in the well sidewalls to extract the corresponding soil. The composition of the soil is then used to determine whether the well contains oil. However, the existing squeeze coring device is relatively small in size and has limited internal space. Therefore, it is inconvenient to change the coring position when sampling the well sidewalls. Utility Model Content

[0003] The purpose of this invention is to provide a workstation switching mechanism for oil well coring in order to solve the above-mentioned problems.

[0004] This utility model achieves the above objectives through the following technical solutions:

[0005] A work station switching mechanism for oil well coring includes a housing, a logging sampling power assembly for drilling and sampling the oil well sidewall is provided on one side inside the housing, a plurality of coring cylinders are arranged in an array below the logging sampling power assembly, and a work station pushing assembly for switching the positions of the plurality of coring cylinders and a transposition assembly for placing the plurality of coring cylinders.

[0006] The transposition assembly includes a core-retrieving cylinder assembly, which has multiple placement holes for placing core-retrieving cylinders at its center and multiple slots on its front and rear sides.

[0007] The pushing component includes a hydraulic cylinder. A U-shaped feeding frame is fixed to the telescopic end of the hydraulic cylinder. The feeding frame consists of a telescopic arm and guide rods. Two symmetrical guide rods are fixed to one end of the telescopic arm. A sliding rod is fixed to one end of each guide rod. A positioning frame is provided between the two guide rods. Limiting grooves for sliding of the guide rods are fixed on both the front and rear sides of the positioning frame. A limiting sleeve for limiting the sliding rod is provided on one side of the limiting groove. The positioning frame has slots perpendicular to the limiting grooves on both the front and rear sides. A second locking pin is provided in the slot. A V-shaped inclined surface is provided on the side of the second locking pin near the guide rod. A pressing inclined surface for pushing the V-shaped inclined surface is provided on the side of the guide rod near the second locking pin. A square hole is provided at the connection position between the guide rod and the telescopic arm. A limiting pin is provided in the square hole. A first locking pin is rotatably connected to the outside of the limiting pin. A torsion spring for pushing the first locking pin into the locking groove is provided in the middle position.

[0008] Preferably, the positioning frame has two vertically distributed limiting frames fixed at the slot opening.

[0009] Preferably, the positioning frame has a C-shaped structure, and the core tube assembly is slidably connected to the positioning frame, and the positioning frame is connected to the outer shell by screws.

[0010] Preferably, each card slot is located between two adjacent placement holes.

[0011] Preferably, the limiting sleeve is fixedly connected to the positioning frame, and the slot is located on the other side of the limiting sleeve.

[0012] Preferably, a spring is provided on the side of the limiting frame near the second locking pin, and the two springs are located on the upper and lower sides of the V-shaped inclined surface, respectively.

[0013] The advantages compared to existing technologies are as follows:

[0014] The first locking pin on the telescopic arm engages with the corresponding slot on the core sampler assembly, allowing the core sampler assembly to move to one side along with the telescopic arm driven by the hydraulic cylinder. When the next core sampler moves to the underside of the logging and sampling power assembly, the compression ramp on the guide rod pushes the V-shaped ramp of the second locking pin, causing the second locking pin to engage with the slot of the moved core sampler assembly. This prevents the core sampler assembly from moving with the telescopic arm as it moves to the other side, thus completing the switching of the core sampler under the logging and sampling power assembly. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the working position switching mechanism for oil well coring according to the present invention;

[0017] Figure 2 This is a cross-sectional view of a workstation switching mechanism for oil well coring according to the present invention;

[0018] Figure 3 This is a schematic diagram of the hydraulic cylinder structure of the work station switching mechanism for oil well coring described in this utility model;

[0019] Figure 4 This is a diagram showing the fit between the core cylinder assembly and the positioning frame of the workstation switching mechanism for oil well core sampling described in this utility model;

[0020] Figure 5 This is a diagram showing the engagement of the second locking pin and the core cylinder assembly in a workstation switching mechanism for oil well coring according to this utility model.

[0021] Figure 6 This is a partial cross-sectional view of the V-shaped inclined plane and the extrusion inclined plane of the work position switching mechanism for oil well coring described in this utility model;

[0022] Figure 7 This is a schematic diagram of the positioning frame structure of the workstation switching mechanism for oil well coring described in this utility model;

[0023] Figure 8 This is a diagram showing the second locking pin and guide rod mating of a workstation switching mechanism for oil well coring according to this utility model;

[0024] Figure 9 This is a schematic diagram of the guide rod structure of the workstation switching mechanism for oil well coring described in this utility model.

[0025] The annotations in the attached figures are explained as follows:

[0026] 1. Outer shell; 21. Hydraulic cylinder; 22. Telescopic arm; 23. Guide rod; 231. Extrusion ramp; 24. Positioning frame; 25. Limiting sleeve; 26. Limiting frame; 27. Limiting pin; 28. First locking pin; 29. ​​Second locking pin; 291. V-shaped ramp; 31. Core tube assembly; 32. Slot; 4. Logging and sampling power assembly; 5. Core tube. Detailed Implementation

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The present invention will be further described below with reference to the accompanying drawings:

[0029] like Figures 1-9 As shown, a work station switching mechanism for oil well coring includes a housing 1. A logging sampling power assembly 4 for drilling and sampling the oil well sidewall is provided on one side of the housing 1. Multiple coring cylinders 5 are arranged in an array on the lower side of the logging sampling power assembly 4. The mechanism also includes a work station pushing assembly for switching the positions of the multiple coring cylinders 5 and a switching assembly for placing the multiple coring cylinders 5.

[0030] In this embodiment: the transposition component includes a core sampler assembly 31. The core sampler assembly 31 has a plurality of placement holes for placing core samples 5 at its center position, and a plurality of slots 32 are provided on the front and rear sides of the core sampler assembly 31. Each slot 32 is located between two adjacent placement holes. The core sampler assembly 31 is used to place the plurality of core samples 5, and the core sampler assembly 31 is moved to place the core samples 5 one by one on the lower side of the logging sampling power assembly 4.

[0031] In this embodiment: the pushing component includes a hydraulic cylinder 21, and a U-shaped feeding frame is fixed to the telescopic end of the hydraulic cylinder 21. The feeding frame consists of a telescopic arm 22 and guide rods 23. Two symmetrical guide rods 23 are fixed to one end of the telescopic arm 22. A sliding rod is fixed to one end of each guide rod 23. A positioning frame 24 is provided between the two guide rods 23. Limiting grooves for sliding of the guide rods 23 are fixed on both the front and rear sides of the positioning frame 24. A limiting sleeve 25 for limiting the sliding rod is provided on one side of the limiting groove. The positioning frame 24 has slots perpendicular to the limiting grooves on both the front and rear sides, and the slots are provided with second locking pins 29. A V-shaped opening is provided on the side of the second locking pin 29 near the guide rod 23. The guide rod 23 has a pressing slope 231 on the side near the second locking pin 29 for pushing the V-shaped slope 291. A square hole is opened at the connection position between the guide rod 23 and the telescopic arm 22, and a limiting pin 27 is provided in the square hole. A first locking pin 28 is rotatably connected to the outside of the limiting pin 27. A torsion spring is provided in the middle of the first locking pin 28 for pushing it to fit into the locking groove 32. The positioning frame 24 is located at the groove opening and has two vertically distributed limiting frames 26. The positioning frame 24 has a C-shaped structure, and the core tube assembly 31 is slidably connected to the positioning frame 24. The positioning frame 24 is connected to the outer shell 1 by screws. The limiting sleeve 25 is fixedly connected to the positioning frame 24. On the other side of the limiting sleeve 25, the limiting frame 26 is provided with a spring near the second locking pin 29, and the two springs are located on the upper and lower sides of the V-shaped inclined surface 291 respectively. The telescopic part of the hydraulic cylinder 21 pushes the telescopic arm 22 to move to one side. At this time, the first locking pin 28 is locked in the corresponding slot 32 on the core tube assembly 31. Then, the telescopic arm 22 pushes the core tube assembly 31 to move on one side inside the positioning frame 24. At this time, the second locking pin 29 will move away from the core tube assembly 31 along the slot, and then the second locking pin 29 will disengage from the corresponding slot 32. At the same time, the spring between the limiting frame 26 and the second locking pin 29 begins to compress. As the core sampler 5 is about to enter below the logging and sampling power assembly 4, the movement of the telescopic arm 22 will push the two guide rods 23 to move synchronously. At this time, the squeezing inclined surface 231 on the guide rod 23 will push the V-shaped inclined surface 291 on the second locking pin 29, causing the second locking pin 29 to move closer to the core sampler assembly 31. Then, the second locking pin 29 will begin to engage with the next locking slot 32. When the next core sampler 5 is completely below the logging and sampling power assembly 4, the second locking pin 29 will engage with the squeezing inclined surface 231 and the V-shaped inclined surface 291 to lock into the next locking slot 32, thereby locking the moved core sampler assembly 31.

[0032] Working principle: In use, the logging sampling power unit 4 first pushes the core cylinder 5 on its lower side to extend out of the outer shell 1, thereby performing core sampling on the sidewall of the oil well.

[0033] After core retrieval is completed, the torsion spring on the limiting pin 27 will cause the first locking pin 28 to engage in the corresponding slot 32. Then, the telescopic part of the hydraulic cylinder 21 will push the telescopic arm 22 to move to one side. The telescopic arm 22 will push the core retrieval cylinder assembly 31 to move to one side inside the positioning frame 24. At this time, the second locking pin 29 will move away from the core retrieval cylinder assembly 31 along the slot. Then, the second locking pin 29 will disengage from the corresponding slot 32. At the same time, the spring between the limiting frame 26 and the second locking pin 29 will begin to compress.

[0034] When the next core sampler 5 is about to enter the area below the logging and sampling power assembly 4, the movement of the telescopic arm 22 will push the two guide rods 23 to move synchronously. At this time, the extrusion slope 231 on the guide rod 23 will push the V-shaped slope 291 on the second locking pin 29, which will then cause the second locking pin 29 to move closer to the core sampler assembly 31, and then begin to cooperate with the next locking slot 32.

[0035] When the next core tube 5 is fully inserted below the logging sampling power assembly 4, the second locking pin 29 will engage with the extrusion inclined surface 231 and the V-shaped inclined surface 291 to lock into the next locking groove 32, thereby locking the moved core tube assembly 31.

[0036] Subsequently, the hydraulic cylinder 21 begins to drive the telescopic arm 22 and the guide rod 23 to move in the opposite direction. The pressing slope 231 on the guide rod 23 will disengage from the pressing of the V-shaped slope 291. Then, the second locking pin 29 will continue to engage with the slot 32 of the core-retrieving cylinder assembly 31 under the action of the spring, preventing the core-retrieving cylinder assembly 31 from moving with the telescopic arm 22. At the same time, the first locking pin 28 will flip away from the core-retrieving cylinder assembly 31 with the limiting pin 27 as the center, thereby allowing the first locking pin 28 to disengage from the locking of the slot 32. When the telescopic arm 22 moves to the initial position, the first locking pin 28 will re-engage into the next slot 32 under the action of the torsion spring.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A workstation switching mechanism for oil well coring, comprising a housing (1), wherein a logging sampling power assembly (4) for drilling and sampling the oil well sidewall is provided on one side of the housing (1), and a plurality of core cylinders (5) arranged in an array are provided on the lower side of the logging sampling power assembly (4), characterized in that: It also includes a station pushing component for switching the positions of multiple core-taking cylinders (5) and a transposition component for placing multiple core-taking cylinders (5); The replacement component includes a core-taking cylinder assembly (31), which has multiple placement holes for placing the core-taking cylinder (5) at its center, and multiple slots (32) on its front and rear sides. The pushing component includes a hydraulic cylinder (21), and a U-shaped feeding frame is fixed to the telescopic end of the hydraulic cylinder (21). The feeding frame consists of a telescopic arm (22) and guide rods (23). Two symmetrical guide rods (23) are fixed to one end of the telescopic arm (22), and a sliding rod is fixed to one end of each of the two guide rods (23). A positioning frame (24) is provided between the two guide rods (23). Limiting grooves for sliding of the guide rods (23) are fixed on both the front and rear sides of the positioning frame (24). A limiting sleeve (25) for limiting the sliding rod is provided on one side of the limiting groove. A perpendicular limit sleeve (25) is opened on both the front and rear sides of the positioning frame (24). The slot has a groove opening, and the groove opening is provided with a second locking pin (29). The second locking pin (29) has a V-shaped inclined surface (291) on the side near the guide rod (23). The guide rod (23) has a pressing inclined surface (231) for pushing the V-shaped inclined surface (291) on the side near the second locking pin (29). The guide rod (23) has a square hole at the connection position with the telescopic arm (22), and a limiting pin (27) is provided in the square hole. The limiting pin (27) is rotatably connected to a first locking pin (28) on the outside. The first locking pin (28) has a torsion spring in the middle position for pushing it to fit into the slot (32).

2. The work station switching mechanism for oil well coring according to claim 1, characterized in that: The positioning frame (24) has two vertically distributed limiting frames (26) fixed at the slot opening.

3. The work station switching mechanism for oil well coring according to claim 1, characterized in that: The positioning frame (24) has a C-shaped structure, and the core tube assembly (31) is slidably connected to the positioning frame (24). The positioning frame (24) is connected to the outer shell (1) by screws.

4. The work station switching mechanism for oil well coring according to claim 1, characterized in that: Each of the slots (32) is located between two adjacent placement holes.

5. The work station switching mechanism for oil well coring according to claim 1, characterized in that: The limiting sleeve (25) is fixedly connected to the positioning frame (24), and the slot is located on the other side of the limiting sleeve (25).

6. The work station switching mechanism for oil well coring according to claim 2, characterized in that: The limiting frame (26) is provided with a spring on the side near the second locking pin (29), and the two springs are located on the upper and lower sides of the V-shaped inclined surface (291), respectively.

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