Solidified cement slurry breaking and dismantling device

Abstract

The utility model relates to the technical field of cement test auxiliary tools, in particular to a consolidated cement slurry forcible entry device. The consolidated cement paste forcible entry device comprises a mounting frame, the mounting frame is provided with a supporting structure used for supporting a cement paste cup and a pushing mechanism used for applying pushing acting force to set cement, the pushing mechanism is located above the supporting structure, and the supporting structure is provided with a through hole allowing the set cement in the cement paste cup to pass through. The mounting frame is further provided with a crushing structure used for crushing set cement, and the crushing structure directly faces the through hole in the supporting structure and is not higher than the through hole. The set cement in the cement paste cup is pushed through the pushing mechanism, the set cement and the stirring paddle wrapped in the set cement are ejected out together, the set cement is crushed under the action of the upper pressure and the crushing structure in the ejection process, and therefore the stirring paddle can be crushed while the cement paste cup and the stirring paddle are not damaged. Solidified set cement is quickly and effectively removed from the cement slurry cup and is crushed, and the stirring paddle is taken out.

Description

Technical Field

[0001] The utility model relates to the technical field of cement test auxiliary tools, in particular to a consolidation cement slurry breaking device. Background Art

[0002] Well cementing is the operation of inserting casing into the well and injecting oil well cement into the annular space between the wellbore and the casing. Its main purpose is to isolate the oil layer, gas layer or water layer in the wellbore, protect the casing of the oil and gas well, increase the life of the oil and gas well and increase the oil and gas production. It is one of the important links in the drilling project of oil and gas wells. The thickening time of cement slurry, that is, the time it takes for the cement slurry to change from the initial consistency to the time when it cannot be pumped, is one of the main performance indicators of cement slurry, which is directly related to the smooth progress of the cementing construction process and the quality of cementing in the later stage. Therefore, it is necessary to reasonably adjust the thickening time of cement slurry according to the conditions such as the drilling depth and the bottom hole temperature to prevent the occurrence of early setting and non-setting of cement slurry during construction, which will lead to construction accidents or oil, gas, water channeling and other undesirable phenomena after construction, affecting the normal progress of oil and gas production. Therefore, it is necessary to test the thickening time of cement slurry before cementing construction to ensure that the thickening time of cement slurry meets the design requirements, so as to provide guarantee for cementing construction.

[0003] In the process of continuous hydration of water and cement to form hydrates, the cement slurry is initially fluid, and then as the hydration continues, the slurry aggregates and thickens until a gel is formed and the flow stops. The time required for the physical and chemical changes of cement hydration, coagulation and hardening is called the thickening time. After the cement slurry reaches the thickening time, it forms a solid. Especially in the high-temperature cement thickening test, the cement slurry often forms hard cement stone that solidifies the stirring paddle and the like in the cement slurry cup and cannot be taken out. At present, the commonly used method of breaking the cement stone solidified in the cement slurry cup is to manually knock the solidified cement stone together with the stirring paddle out of the cement slurry cup with a hammer, a screwdriver or other tools, and then smash the solidified cement stone with a hammer or the like to take out the stirring paddle. Due to the high hardness of the solidified cement stone, it is very easy to damage the cement slurry cup or the stirring paddle when knocking with a hammer, a screwdriver or other tools. At the same time, the splashing of cement stone fragments during knocking can easily cause personal injury and environmental pollution, which poses a safety hazard and environmental pollution problem.

[0004] The Chinese utility model patent with authorization announcement number CN204673542U discloses a high-temperature and high-pressure thickener cement slurry cup disassembly device, which includes a base, on which four vertical poles are fixedly installed to form a bracket, a support plate for supporting the cement slurry cup is provided in the middle of the bracket, and a limit plate for limiting the cement slurry cup from the upper side is provided on the top of the bracket. A hydraulic jack is provided on the base, and the cement stone in the cement slurry cup is pushed by the hydraulic jack to push the cement stone and the stirring paddle wrapped in the cement stone out of the cement slurry cup together, and then the cement stone is broken by knocking to remove the stirring paddle.

[0005] Although the existing cement slurry cup disassembly device can use a driving mechanism such as a hydraulic jack to push the cement stone together with the stirring paddle wrapped in the cement stone out of the cement slurry cup when in use, avoiding damage to the cement slurry cup caused by manual knocking of the cement stone, after the cement stone is pushed out, the worker still needs to use a tool to knock the cement stone to break it before taking out the stirring paddle. When knocking manually, there are still problems of damaging the stirring paddle and splashing of cement stone fragments, causing safety hazards and environmental pollution. In addition, the cement stone and the stirring paddle are first pushed out of the cement slurry cup together, and then the cement stone is manually broken to take out the stirring paddle. The whole process is time-consuming, troublesome to disassemble, and inefficient. Utility Model Content

[0006] The utility model aims to provide a cement slurry breaking device to solve the problem that the existing cement slurry cup disassembly device still needs to manually break the cement stone to remove the stirring paddle after the cement stone and the stirring paddle are pushed out of the cement slurry cup together, which causes damage to the stirring paddle and low disassembly efficiency.

[0007] In order to achieve the above purpose, the utility model of the consolidation cement slurry demolition device adopts the following technical scheme:

[0008] A consolidated cement slurry breaking device comprises a mounting frame, on which a supporting structure for supporting a cement slurry cup and a pushing mechanism for applying a pushing force to cement stone in the cement slurry cup are provided, the pushing mechanism being located above the supporting structure, the supporting structure being provided with a through hole for cement stone in the cement slurry cup to pass downward when pushed, the mounting frame being further provided with a crushing structure for crushing the cement stone, the crushing structure being directly opposite to the through hole on the supporting structure and not higher than the through hole.

[0009] Furthermore, the crushing structure is located below the through hole.

[0010] Furthermore, a collector for collecting cement stone fragments is provided on the mounting frame below the supporting structure, and the crushing structure is arranged in the collector.

[0011] Furthermore, the top of the collector abuts against the bottom of the supporting structure.

[0012] Furthermore, the crushing structure is a crushing cone.

[0013] Furthermore, four crushing cones are provided and arranged in a cross shape, and an escape space for evading the blades of the stirring paddle is formed between adjacent crushing cones.

[0014] Furthermore, the support structure is provided with a limiting structure for limiting the cement slurry cup in the circumferential direction.

[0015] Furthermore, two slurry cup clamps are provided on the support structure, and the two slurry cup clamps are arranged opposite to each other on the same circumference. Each slurry cup clamp has a clamping surface for clamping and cooperating with the outer wall of the cement slurry cup, and the two slurry cup clamps together constitute the limiting structure.

[0016] Furthermore, the pushing mechanism includes a hydraulic booster and a pressure head installed at the output end of the hydraulic booster, and the pressure head has a pressing surface for pressing and matching with the end surface of the cement stone.

[0017] Furthermore, the middle part of the top pressure surface has an avoidance groove or avoidance hole for avoiding the bottom of the stirring paddle.

[0018] Beneficial effects: The utility model consolidated cement slurry breaking device is improved on the basis of the existing cement slurry cup disassembly device, and the pushing mechanism is arranged above the supporting structure, and a through hole is arranged on the supporting structure for the cement stone in the cement slurry cup to pass downward, and a crushing structure is arranged on the mounting frame, and the crushing structure is directly opposite to the through hole on the supporting structure and is not higher than the through hole. After the cement slurry cup is inverted on the supporting structure, the angle of the cement slurry cup can be adjusted so that the crushing mechanism avoids the blade of the stirring paddle, and then the cement stone in the cement slurry cup is pushed by the pushing mechanism to push out the cement stone together with the stirring paddle wrapped in the cement stone. During the ejection process, the crushing structure contacts the cement stone, and the cement stone is crushed under the action of the upper pressure and the crushing structure, so that the consolidated cement stone can be quickly and effectively removed from the cement slurry cup and crushed, and the stirring paddle can be taken out without damaging the cement slurry cup and the stirring paddle. The cement stone is crushed while being pushed out of the cement slurry cup, and it is no longer necessary to crush the cement stone manually, thereby greatly improving the disassembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of an embodiment of the consolidated cement slurry demolition device of the utility model in use;

[0020] In the figure: 1. base; 2. bracket; 3. hydraulic booster; 4. pressure head; 401. avoidance groove; 5. slurry cup holder; 6. support plate; 601. through hole; 7. collector; 8. crushing cone; 9. cement slurry cup; 10. cement stone; 11. stirring paddle; 12. manual pressurizing handle. DETAILED DESCRIPTION

[0021] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0022] The scheme principle of the consolidated cement slurry breaking device of the utility model is as follows: a supporting structure and a pushing mechanism are arranged on a mounting frame, the pushing mechanism is located above the supporting structure, a through hole is arranged on the supporting structure for cement stone in the cement slurry cup to pass downward, and a crushing structure is arranged on the mounting frame at a position directly opposite to the through hole on the supporting structure. When in use, the cement slurry cup is inverted on the supporting structure so that the crushing mechanism avoids the blades of the stirring paddle, the cement stone in the cement slurry cup can be pushed by the pushing mechanism, and the cement stone together with the stirring paddle wrapped in the cement stone can be ejected. During the ejection process, the crushing structure contacts the cement stone, and the cement stone is crushed under the action of the upper pressure and the crushing structure, thereby realizing that the consolidated cement stone can be quickly and effectively removed from the cement slurry cup and crushed and the stirring paddle can be taken out without damaging the cement slurry cup and the stirring paddle.

[0023] Embodiment of the utility model of the consolidation cement slurry breaking device:

[0024] like Figure 1 As shown, the cement slurry breaking device includes a mounting frame, which includes a base 1 and a bracket 2 fixedly mounted on the base 1. The bracket 2 is a rectangular frame. A supporting structure for supporting the cement slurry cup 9 is provided inside the bracket 2. The supporting structure is specifically a horizontally arranged support plate 6. The support plate 6 is fixedly mounted on the bracket 2. A through hole 601 is provided in the middle of the support plate 6 for the cement stone 10 in the cement slurry cup 9 to pass downward. The through hole 601 is a circular hole, and the aperture of the through hole 601 is equal to the inner diameter of the cement slurry cup 9. Of course, the aperture of the through hole can also be larger than the inner diameter of the cement slurry cup 9 and smaller than the outer diameter of the cement slurry cup 9, so as to ensure that the cement slurry cup 9 can be supported on the support plate 6 and the cement stone 10 in the cement slurry cup 9 can smoothly pass through the through hole on the support plate 6. A pushing mechanism is provided on the top of the bracket 2, and the pushing mechanism is used to apply a pushing force to the cement stone 10 in the cement slurry cup 9 to push the cement stone 10 out of the cement slurry cup 9. The upper end of the bracket 2 has a central hole, the pushing portion of the pushing mechanism is directly opposite to the central hole, and the radial dimension of the pushing portion is smaller than the aperture of the central hole.

[0025] The jacking mechanism specifically includes a hydraulic booster 3 and a pressure head 4 installed at the output end of the hydraulic booster 3. The pressure head 4 constitutes the jacking part of the jacking mechanism, and the pressure head 4 has a jacking surface for jacking with the end face of the cement stone 10. The pressure head 4 is circular, and the radial dimension of the pressure head 4 is smaller than the inner diameter of the cement slurry cup 9, so as to ensure that the pressure head 4 can form a jacking fit with the cement stone 10 in the cement slurry cup 9 without causing damage to the cement slurry cup 9. The hydraulic booster 3 is a mature existing technology. The hydraulic booster 3 is used as a driving component to facilitate the control of the jacking speed and thus the jacking effect. The pressure head 4 is installed at the output end of the hydraulic booster 3, and the size and shape of the pressure head 4 are designed. By pressing the cement stone 10 with the pressure head 4, it can be further ensured that the pressure head 4 and the end face of the cement stone 10 have a large jacking contact area, and a relatively uniform jacking force is applied to the end face of the cement stone 10, thereby ensuring that the cement stone 10 is smoothly pushed out of the cement slurry cup 9. The central axis of the pressure head 4 is in line with the central axis of the through hole 601 on the support plate 6, which can effectively prevent the cement stone 10 from being pressed eccentrically and damaging the cement slurry cup 9 during the demolition process.

[0026] The mounting frame is also provided with a crushing structure for crushing the cement stone 10. The crushing structure is a crushing cone 8. There are four crushing cones 8 arranged in a cross shape. An escape space for the paddles of the stirring paddle is formed between adjacent crushing cones 8 to prevent the paddles from being damaged during the demolition process. The crushing structure is directly opposite to the through hole 601 on the supporting structure and is not higher than the through hole 601. When the cement stone 10 is pushed downward, the crushing structure contacts the cement stone 10 and crushes it. In a preferred embodiment, Figure 1 As shown in the figure, the crushing structure is located below the through hole 601 on the supporting structure, and the crushing structure is at a distance from the cement stone 10, so that it can be ensured that the cement stone 10 is pushed out for a distance before contacting the crushing structure. When the cement stone 10 contacts the crushing structure, the surrounding area is not restricted by the cement slurry cup 9, the crushing effect is better, and the cement slurry cup 9 can be better protected.

[0027] A collector 7 for collecting cement stone fragments is provided on the mounting frame below the supporting structure, and a crushing structure is arranged in the collector 7. During the ejection process of the cement stone 10, the crushing structure contacts the cement stone 10 to crush it, and the crushed cement stone fragments are collected in the collector 7, which can prevent the cement stone fragments from splashing and causing safety hazards and environmental pollution. The top of the collector 7 is in contact with the bottom of the supporting structure. On the one hand, there is no gap between the top of the collector 7 and the bottom of the supporting structure, which completely prevents the cement stone fragments from splashing outside the collector 7 and ensures that all the cement stone fragments fall into the collector 7; on the other hand, the collector 7 can play a certain supporting role on the supporting structure, making the supporting structure more stable and supporting the cement slurry cup 9 more reliable.

[0028] In order to place the cement slurry cup 9 more stably on the support structure and prevent the cement slurry cup 9 from moving on the bracket 2 during the pushing process, a limiting structure for limiting the cement slurry cup 9 in the circumferential direction is also provided on the support structure. Two slurry cup clamps 5 protruding from the support plate 6 are provided on the upper part of the support structure, i.e., the support plate 6. The two slurry cup clamps 5 are arranged relatively on the same circumference. Each slurry cup clamp 5 has a clamping surface for clamping and cooperating with the outer wall surface of the cement slurry cup 9. The two slurry cup clamps 5 clamp the cement slurry cup 9 in the circumferential direction together, thereby limiting the cement slurry cup 9 in the circumferential direction, so that the cement slurry cup 9 cannot be displaced or moved on the bracket 2. The two slurry cup clamps 5 together constitute a limiting structure.

[0029] After the top cover and the bottom cover of the cement slurry cup 9 are removed, the bottom of the stirring paddle 11 is exposed from the cement slurry cup 9, that is, protruding from the end surface of the cement stone 10. In order to prevent the exposed part of the stirring paddle 11 from being compressed and deformed when the pressure head 4 presses the end surface of the cement stone 10, an avoidance groove 401 for avoiding the bottom of the stirring paddle is provided in the middle of the pressing surface of the pressure head 4. The pressure head 4 does not contact the stirring paddle 11, so it will not cause damage to the stirring paddle 11. Of course, in other embodiments, an axially through avoidance hole can also be provided in the middle of the pressure head to avoid the bottom of the stirring paddle.

[0030] When breaking the consolidated cement slurry, firstly, the cement slurry cup 9 is inverted on the support plate 6, and the cement slurry cup 9 is clamped in the two slurry cup clamps 5. The angle of the cement slurry cup 9 is adjusted so that the crushing cone 8 is directly opposite to the cement consolidation part and effectively avoids the blade of the stirring paddle 11. The blade at the upper part of the stirring paddle 11 has a small tip part (not shown in the figure) that exposes the cement stone 10. The crushing cone 8 avoids the small tip part of the blade and its vicinity to effectively avoid the blade. Then, the manual pressure handle 10 is used to control the hydraulic booster 3, so that the hydraulic booster 3 drives the pressure head 4 to move downward and push the consolidated cement stone 10 downward to separate from the cement slurry cup 9. The cement stone 10 pushed out of the cement slurry cup 9 is crushed under the upper pressure and the crushing cone, and the cement stone fragments are collected in the collector 7. It can be achieved that the consolidated cement stone 10 is quickly and effectively removed from the cement slurry cup 9 and the stirring paddle 11 without damaging the cement slurry cup 9 and the stirring paddle 11. There is no need to manually crush the cement stone 10, thus avoiding the potential safety hazard and environmental pollution caused by splashing of cement stone fragments, and greatly improving the disassembly efficiency.

[0031] The consolidated cement slurry breaking device of the utility model has reasonable structural design, small size, easy operation and the like, and can quickly and effectively break the consolidated cement stone and collect and process it in a centralized manner while preventing the cement slurry cup and the stirring paddle from being damaged.

[0032] In other embodiments of the consolidated cement slurry breaking device, the top of the crushing cone can also be extended into the through hole on the supporting structure. At this time, there is a small distance between the crushing cone and the cement stone in the cement slurry cup, and the cement stone contacts the crushing cone after being pushed out a short distance.

[0033] In other embodiments of the consolidated cement slurry breaking device, the collector may not be provided, and the crushing cone may be directly installed on the base.

[0034] In other embodiments of the consolidated cement slurry breaking device, a small distance may be provided between the top of the collector and the bottom of the supporting structure so that the two do not contact each other.

[0035] In other embodiments of the cement slurry breaking device, the breaking structure may use a breaking nail in addition to a breaking cone. The breaking cone may be provided in one, two, three, etc. When there are more than two breaking cones, an escape space should be formed between adjacent breaking cones to allow the blades of the stirring paddle to escape.

[0036] In other embodiments of the consolidated cement slurry breaking device, more than three limit screws can be installed on the supporting structure, all of which are evenly distributed on the same circumference. The diameter of the circle surrounded by all the limit screws is slightly larger than the outer diameter of the cement slurry cup so as to limit the cement slurry cup from the circumferential direction.

[0037] In other embodiments of the consolidated cement slurry demolition device, the hydraulic booster may also be replaced by a driving mechanism such as a jack or a hydraulic cylinder.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cement slurry breaking device, comprising a mounting frame, on which a supporting structure for supporting a cement slurry cup and a pushing mechanism for applying a pushing force to cement stone in the cement slurry cup are provided, characterized in that: The pushing mechanism is located above the supporting structure. The supporting structure is provided with a through hole for the cement stone in the cement slurry cup to pass downward when being pushed. The mounting frame is also provided with a crushing structure for crushing the cement stone. The crushing structure is directly opposite to the through hole on the supporting structure and is not higher than the through hole.

2. The consolidated cement slurry breaking device according to claim 1 is characterized in that: The crushing structure is located below the through hole.

3. The device for breaking cement slurry according to claim 1, characterized in that: A collector for collecting cement stone fragments is arranged on the mounting frame below the supporting structure, and the crushing structure is arranged in the collector.

4. The device for breaking the cement slurry according to claim 3 is characterized in that: The top of the collector abuts against the bottom of the support structure.

5. The device for breaking cement slurry according to any one of claims 1 to 4, characterized in that: The crushing structure is a crushing cone.

6. The device for breaking the cement slurry according to claim 5, characterized in that: The crushing cones are provided with four and arranged in a cross shape, and an escape space for evading the blades of the stirring paddle is formed between adjacent crushing cones.

7. The device for breaking the cement slurry according to claim 1, characterized in that: The support structure is provided with a limiting structure for limiting the cement slurry cup in the circumferential direction.

8. The device for breaking the cement slurry according to claim 7, characterized in that: The support structure is provided with two slurry cup clamps, which are arranged opposite to each other on the same circumference. Each slurry cup clamp has a clamping surface for clamping and cooperating with the outer wall of the cement slurry cup. The two slurry cup clamps together constitute the limiting structure.

9. The device for breaking the cement slurry according to claim 1, characterized in that: The pushing mechanism comprises a hydraulic booster and a pressure head installed at the output end of the hydraulic booster, wherein the pressure head has a pressing surface for pressing and matching with the end surface of the cement stone.

10. The device for breaking solidified cement slurry according to claim 9, characterized in that: The middle part of the top pressure surface is provided with an avoidance groove or avoidance hole for avoiding the bottom of the stirring paddle.

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