Safe coring device for coring construction

Abstract

The invention relates to the technical field of well drilling and coring, in particular to a safe coring device for coring construction, which is used for solving the problem that a core in a barrel is easy to rush out at the moment of detaching a core catcher assembly. A main hydraulic cylinder body is connected to the bottom of the supporting mechanism, a supporting piston is slidably connected into the main hydraulic cylinder body, and a rock core body is borne by the top of the supporting piston; when the main hydraulic cylinder body releases pressure, the rock core body pushes the supporting piston to move downwards under the gravity; when the core catcher seat is detached, the core body is located at the top of the supporting piston, and the core body pushes the supporting piston to move downwards under the action of gravity by controlling the pressure in the main hydraulic cylinder body and slowly releasing the pressure, so that slow core discharging is realized, and the problem that the core body in the cylinder is easily rushed out at the moment of detaching the core catcher assembly is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling coring, and particularly to a safety core extraction device for coring construction. Background Art

[0002] Drilling coring is the most direct means to obtain formation data. Technicians obtain formation rock samples through drilling coring, analyze the permeability, porosity and other rock physical property parameters of the formation, and then formulate a reasonable exploration and development plan.

[0003] At present, the core extraction operation of medium and long barrel drilling coring usually adopts the vertical core extraction method. When extracting the core, it is necessary to disassemble the core catcher assembly and then lift the inner barrel. Only after exposing part of the core can core extraction tools such as core tongs be used. Disassembling the core catcher assembly needs to be at a certain distance from the ground. At the moment when the disassembly is completed, the core catcher assembly falls off. At this time, the weight of the core in the barrel acts on the falling core catcher assembly. The core catcher assembly is prone to tipping due to the instantaneous force or slipping due to the influence of the ground, resulting in the core in the barrel rushing out, which is extremely likely to cause personal injury and core damage. After the core rushes out, it is not easy to complete the alignment and calibration, which has an adverse impact on the later inspection and the judgment of formation lithology. Summary of the Invention

[0004] The present invention provides a safety core extraction device for coring construction to solve the problem that the core in the barrel is prone to rush out when the core catcher assembly is disassembled instantaneously.

[0005] In order to alleviate the above technical problems, the technical solution provided by the present invention lies in:

[0006] A safety core extraction device for coring construction includes a support mechanism; a main liquid cylinder body is connected to the bottom of the support mechanism, a support piston is slidably connected inside the main liquid cylinder body, and a core body is received on the top of the support piston; when the main liquid cylinder body is depressurized, the core body is pushed by gravity to move the support piston downward.

[0007] Furthermore, a downward pull pipeline and an upward push pipeline are connected to the main liquid cylinder body; when pressurizing the main liquid cylinder body through the downward pull pipeline and opening the upward push pipeline, the support piston moves downward; when pressurizing the main liquid cylinder body through the upward push pipeline and opening the upward push pipeline, the support piston moves upward; when the upward push pipeline and the downward pull pipeline are opened simultaneously, the support piston can be pressed to move downward.

[0008] Furthermore, a groove is formed at the top of the support piston, and the core body is placed in the groove.

[0009] Furthermore, an adjusting screw is radially connected to the top of the support piston, and a downward pull slip is rotatably connected to the end of the adjusting screw. The downward pull slip is located in the groove; rotating the adjusting screw can make the downward pull slip approach or move away from the core body.

[0010] Further, the number of the lower slips and the adjusting screw rods is multiple; the multiple lower slips and the adjusting screw rods are circumferentially and evenly distributed on the top of the support piston.

[0011] Further, the support mechanism includes: a base; a bracket connected to the base; an upper support frame connected to the top of the bracket; a support plate connected to the upper support frame; and a suspension arm connected to the support plate.

[0012] Further, a fixing ring is connected to the middle of the upper support frame; a core inner barrel is inserted into the fixing ring, and the core body is located inside the core inner barrel.

[0013] Further, a plurality of push-pull hydraulic cylinders connected to the support plate are further included; a push-pull piston is slidably connected in each of the plurality of push-pull hydraulic cylinders; when the plurality of push-pull pistons extend out of the corresponding push-pull hydraulic cylinders, the core inner barrel or the core body can be clamped.

[0014] Further, a retraction pipeline and an ejection pipeline are connected to the push-pull hydraulic cylinder; when the retraction pipeline is opened and pressure is applied to the push-pull hydraulic cylinder through the ejection pipeline, the push-pull piston extends out of the push-pull hydraulic cylinder; when the ejection pipeline is opened and pressure is applied to the push-pull hydraulic cylinder through the retraction pipeline, the push-pull piston retracts into the push-pull hydraulic cylinder.

[0015] Further, a push-pull block is fixedly connected to the end of the push-pull piston, and a clamping slip is fixedly connected to the push-pull block.

[0016] The beneficial effects of the present invention are analyzed as follows:

[0017] The safety core discharging device for coring construction includes a support mechanism; a main hydraulic cylinder body is connected to the bottom of the support mechanism, a support piston is slidably connected inside the main hydraulic cylinder body, and the top of the support piston bears a core body; when the main hydraulic cylinder body is depressurized, the core body pushes the support piston to move downward under the action of gravity.

[0018] After the core claw seat is disassembled, the core body is located on the top of the support piston. By controlling the pressure in the main hydraulic cylinder body and slowly depressurizing, the core body pushes the support piston to move downward under the action of gravity, realizing slow core discharging, thereby solving the problem that the core body in the barrel is easily ejected instantaneously when the core claw assembly is disassembled. Description of the Drawings

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the related art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 Schematic diagram of the overall structure of the present invention;

[0021] Figure 2 Top view of the present invention.

[0022] Icon:

[0023] 100, support mechanism; 110, base; 120, bracket; 130, suspension arm; 140, upper support frame; 150, support plate; 200, core inner barrel; 210, core body; 220, fixing ring; 300, main liquid cylinder body; 310, downward pipeline; 320, upward pipeline; 330, support piston; 340, downward slip; 350, adjusting screw; 400, push-pull liquid cylinder; 410, retracting pipeline; 420, ejecting pipeline; 430, push-pull piston; 440, push-pull block; 450, clamping slip. Specific embodiments

[0024] The following will clearly and completely describe the technical solutions of the present invention with reference to the drawings. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0025] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Embodiment

[0028] As Figure 1 - Figure 2 shown, a safety core extraction device for coring construction includes a support mechanism 100; a main hydraulic cylinder body 300 is connected to the bottom of the support mechanism 100, a support piston 330 is slidably connected inside the main hydraulic cylinder body 300, and a core body 210 is received on the top of the support piston 330; when the main hydraulic cylinder body 300 is depressurized, the core body 210 is pushed by gravity to move the support piston 330 downward.

[0029] The working mechanism of the safety core extraction device for coring construction provided by this embodiment is as follows:

[0030] When the core gripper seat is disengaged, the core body 210 is on the top of the support piston 330. By controlling the pressure in the main hydraulic cylinder body 300 and slowly depressurizing, the core body 210 is pushed by gravity to move the support piston 330 downward, realizing slow core extraction, thereby solving the problem that the core body 210 in the barrel is likely to rush out instantaneously when the core gripper assembly is disassembled.

[0031] In an alternative embodiment of this embodiment, preferably:

[0032] A downward pull pipeline 310 and an upward push pipeline 320 are connected to the main hydraulic cylinder body 300; when pressurizing the main hydraulic cylinder body 300 through the downward pull pipeline 310 and opening the upward push pipeline 320, the support piston 330 moves downward; when pressurizing the main hydraulic cylinder body 300 through the upward push pipeline 320 and opening the upward push pipeline 320, the support piston 330 moves upward; when both the upward push pipeline 320 and the downward pull pipeline 310 are opened simultaneously, the support piston 330 can be pressed to move downward.

[0033] By precisely controlling the hydraulic pressure in the downward pull pipeline 310 and the upward push pipeline 320, precise control of the support piston 330 can be achieved. Before disassembling the core gripper assembly, the main hydraulic cylinder body 300 can be pressurized through the upward push pipeline 320 to move the support piston 330 upward, thereby stably supporting the core body 210, and this can avoid the core body 210 rushing out due to gravity during the disassembly process.

[0034] In an alternative embodiment of this embodiment, preferably:

[0035] The top of the support piston 330 is provided with a groove, and the core body 210 is placed in the groove.

[0036] When the core body 210 is placed in the groove, it can stay stably on the top of the support piston 330, avoiding sliding or shaking during the movement of the support piston 330. By placing the core body 210 in the groove, the stability of the core body 210 can be increased. The design and structure of the groove can provide support and fixation for the core body 210, preventing it from shaking or sliding during movement, thereby reducing the risk of the core body 210 breaking out.

[0037] In an alternative embodiment of the present example, preferably:

[0038] The top of the support piston 330 is radially connected with an adjusting screw 350. The end of the adjusting screw 350 is rotatably connected with a lower slip 340, and the lower slip 340 is located in the groove; rotating the adjusting screw 350 can make the lower slip 340 approach or move away from the core body 210.

[0039] Through the cooperation of the adjusting screw 350 and the lower slip 340, the position and stability of the core body 210 can be precisely adjusted. When it is necessary to disassemble the core gripper assembly, the lower slip 340 can be made to approach the core body 210 by rotating the adjusting screw 350, increasing the clamping force and stability of the core body 210, thereby reducing the risk of the core body 210 breaking out, and it can be adjusted according to the sizes and shapes of different core bodies 210. By adjusting the length of the adjusting screw 350 and the shapes and sizes of the lower slips 340, it can adapt to core bodies 210 of different sizes and shapes, ensuring good fit and stability.

[0040] In an alternative embodiment of the present example, preferably:

[0041] The number of the lower slips 340 and the adjusting screws 350 is multiple; the multiple lower slips 340 and adjusting screws 350 are circumferentially and evenly distributed on the top of the support piston 330.

[0042] The design of the multiple lower slips 340 and adjusting screws 350 can provide more uniform support and clamping force, reducing the shaking and sliding of the core body 210 during movement. Through the synergistic effect of the multiple lower slips 340 and adjusting screws 350, the position and stability of the core body 210 can be more precisely controlled, thereby reducing the risk of the core body 210 breaking out.

[0043] Regarding the support mechanism 100, specifically:

[0044] The support mechanism 100 includes: a base 110; a bracket 120 connected to the base 110; an upper support frame 140 connected to the top of the bracket 120; a support plate 150 connected to the upper support frame 140; and a suspension arm 130 connected to the support plate 150.

[0045] The support mechanism 100 is the foundation of the entire device. Through the combined action of the base 110, the bracket 120, the upper support frame 140, and the support plate 150, it ensures that the device can be stably supported and operated in various working environments.

[0046] In an alternative embodiment of the present example, a more preferred option is:

[0047] A fixed ring 220 is connected to the middle of the upper support frame 140; a core barrel 200 is inserted through the fixed ring 220, and the core body 210 is located inside the core barrel 200.

[0048] As a part of the upper support frame 140, the fixed ring 220 can provide stable support for the core barrel 200. By inserting the core barrel 200 into the fixed ring 220, the position and stability of the core barrel 200 on the support mechanism 100 can be ensured. At the same time, the core body 210 is located inside the core barrel 200. Through the support and fixation of the core barrel 200, the control and protection of the core can be further enhanced. In addition, through the design of the upper support frame 140 and the fixed ring 220, it is also convenient for the operator to perform subsequent disassembly and removal work. The position and structure of the upper support frame 140 and the fixed ring 220 enable the operator to easily access the core barrel 200 and the core body 210 for relevant operations and adjustments.

[0049] In an alternative embodiment of the present example, a more preferred option is:

[0050] It further includes a plurality of push-pull hydraulic cylinders 400 connected to the support plate 150; a push-pull piston 430 is slidably connected inside each of the plurality of push-pull hydraulic cylinders 400; when the plurality of push-pull pistons 430 extend out of the corresponding push-pull hydraulic cylinders 400, they can clamp the core barrel 200 or the core body 210.

[0051] By the extension of the push-pull piston 430, the clamping and fixation of the core barrel 200 and the core body 210 can be achieved. This helps to reduce the shaking or sliding of the core barrel 200 and the core body 210 caused by vibration, impact, or other factors during the core sampling construction process, thereby reducing the risk of the core body 210 breaking out. In addition, the design of the plurality of push-pull hydraulic cylinders 400 also provides greater flexibility and adaptability. According to different core sampling requirements and operation requirements, the extension length and clamping force of the push-pull piston 430 can be adjusted to adapt to core barrels 200 and core bodies 210 of different sizes and shapes.

[0052] In an alternative embodiment of the present invention, preferably:

[0053] A retraction pipeline 410 and an ejection pipeline 420 are connected to the push-pull hydraulic cylinder 400. When the retraction pipeline 410 is opened and pressure is applied to the push-pull hydraulic cylinder 400 through the ejection pipeline 420, the push-pull piston 430 extends out of the push-pull hydraulic cylinder 400. When the ejection pipeline 420 is opened and pressure is applied to the push-pull hydraulic cylinder 400 through the retraction pipeline 410, the push-pull piston 430 retracts into the push-pull hydraulic cylinder 400.

[0054] When the retraction pipeline 410 is opened and pressure is applied to the push-pull hydraulic cylinder 400 through the ejection pipeline 420, the push-pull piston 430 will extend out of the push-pull hydraulic cylinder 400. This design enables the operator to precisely control the extension and retraction of the push-pull piston 430 by controlling the pressure applied to the retraction pipeline 410 and the ejection pipeline 420, thereby realizing the clamping and release of the core barrel 200 and the core body 210.

[0055] In an alternative embodiment of the present invention, preferably:

[0056] A push-pull block 440 is fixedly connected to the end of the push-pull piston 430, and a clamping jaw 450 is fixedly connected to the push-pull block 440.

[0057] As an intermediate component connecting the push-pull piston 430 and the clamping jaw 450, the push-pull block 440 plays a role in transmitting thrust and pulling force. When the push-pull piston 430 extends or retracts, the push-pull block 440 will move accordingly, thereby driving the clamping jaw 450 to perform clamping or release operations. The clamping jaw 450 is a component that directly contacts the core barrel 200 or the core body 210. Its shape and size can be customized according to the characteristics of the core barrel 200 and the core body 210 to ensure good fit and clamping stability. Through the clamping action of the clamping jaw 450, the control and stability of the core barrel 200 and the core body 210 can be further increased, preventing them from shaking or sliding during the coring operation. The coordinated action of the push-pull piston 430, the push-pull block 440, and the clamping jaw 450 can achieve precise clamping and control of the core barrel 200 and the core body 210, which will help improve the safety and efficiency of the coring operation, ensure the smooth progress of the operation process, and reduce the risk of core ejection.

[0058] When a core jamming occurs, the core body 210 cannot move downward. At this time, compressed air is injected into the ejection pipeline 420, the push-pull piston 430 pushes the push-pull block 440 to extend, and the clamping slip 450 clamps the core barrel 200; compressed air is injected into the upward push pipeline 320 to push the support piston 330 to rise, the downward pull slip 340 clamps the core body 210, and the adjusting screw 350 firmly holds the downward pull slip 340 around the core body 210. At this time, compressed air is injected into the downward pull pipeline 310 to push the support piston 330 to move downward, and the core body 210 is forcibly pulled out from the core barrel 200 to achieve core ejection.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. Safety core extraction device for coring construction, including a support mechanism (100), characterized in that ； The bottom of the support mechanism (100) is connected to a main hydraulic cylinder body (300). A support piston (330) is slidably connected inside the main hydraulic cylinder body (300), and the top of the support piston (330) bears a core body (210). When the main hydraulic cylinder body (300) is depressurized, the core body (210) is pushed by gravity to move the support piston (330) downward.

2. The safe core extraction device for coring construction according to claim 1, wherein; A downward pull pipeline (310) and an upward push pipeline (320) are connected to the main hydraulic cylinder body (300); When pressurizing the main hydraulic cylinder body (300) through the downward pull pipeline (310) and opening the upward push pipeline (320), the support piston (330) moves downward; When pressurizing the main hydraulic cylinder body (300) through the upward push pipeline (320) and opening the upward push pipeline (320), the support piston (330) moves upward; When the upward push pipeline (320) and the downward pull pipeline (310) are opened simultaneously, the support piston (330) can be pressed to move downward.

3. The safety core extraction device for coring construction according to claim 2, It is characterized in that; A groove is formed at the top of the support piston (330), and the core body (210) is placed in the groove.

4. The safety core extraction device for coring construction according to claim 3, It is characterized in that; A regulating screw (350) is radially connected to the top of the support piston (330). The end of the regulating screw (350) is rotatably connected to a downward pull slip (340), and the downward pull slip (340) is located in the groove; Rotating the regulating screw (350) can make the downward pull slip (340) approach or move away from the core body (210).

5. The safety core extraction device for coring construction according to claim 4, It is characterized in that; The number of the downward pull slips (340) and the regulating screws (350) is multiple; The multiple downward pull slips (340) and the regulating screws (350) are circumferentially and uniformly distributed on the top of the support piston (330).

6. The safety core extraction device for coring construction according to claim 1, wherein ； The support mechanism (100) includes: A base (110); A bracket (120) connected to the base (110); An upper support frame (140) connected to the top of the bracket (120); A support plate (150) connected to the upper support frame (140); A suspension arm (130) connected to the support plate (150).

7. The safety core extraction device for coring construction according to claim 6, characterized in that ； A fixing ring (220) is connected to the middle of the upper support frame (140); A core barrel (200) is inserted into the fixing ring (220), and the core body (210) is located inside the core barrel (200).

8. The safety core extraction device for coring construction according to claim 7, characterized in that ； It further includes a plurality of push-pull hydraulic cylinders (400) connected to the support plate (150); A push-pull piston (430) is slidably connected inside each of the plurality of push-pull hydraulic cylinders (400); When the plurality of push-pull pistons (430) extend out of the corresponding push-pull hydraulic cylinders (400), they can clamp the core barrel (200) or the core body (210).

9. The safe core extraction device for coring construction according to claim 8, wherein; A retraction pipeline (410) and an ejection pipeline (420) are connected to the push-pull hydraulic cylinder (400); When the recovery pipeline (410) is opened and pressure is applied to the push-pull hydraulic cylinder (400) through the ejection pipeline (420), the push-pull piston (430) extends out of the push-pull hydraulic cylinder (400); When the ejection pipeline (420) is opened and pressure is applied to the push-pull hydraulic cylinder (400) through the recovery pipeline (410), the push-pull piston (430) retracts into the push-pull hydraulic cylinder (400).

10. The safety core extraction device for coring construction according to claim 9, wherein; A push-pull block (440) is fixedly connected to the end of the push-pull piston (430), and a clamping slip (450) is fixedly connected to the push-pull block (440).

Images