Device for quickly locking and releasing safety slip and hydraulic drive type safety slip

Abstract

The utility model provides a device for quickly locking and releasing a safety slip and a hydraulic drive type safety slip, the device comprises a hydraulic source, a hydraulic cylinder, a hydraulic lock, a hydraulic locking pipeline, a hydraulic unlocking pipeline, a piston rod and a reversing valve, the hydraulic cylinder is connected with the piston rod, and the piston rod can penetrate through a slip connecting plate and lock the slip; a hydraulic lock is arranged on the hydraulic cylinder and is connected with the reversing valve through a hydraulic locking pipeline and a hydraulic unlocking pipeline which are arranged in parallel; the hydraulic source is connected with the reversing valve. The safety slip comprises the safety slip and the device for quickly locking and releasing the safety slip. The safety slip can ensure that the hydraulic power is not attenuated and the locking function is not invalid under the conditions of pressure drop of a hydraulic source, pipeline damage and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of machinery, and in particular to a device for quickly locking and releasing a safety slip and a hydraulically driven safety slip. Background Art

[0002] Safety slips are used in oil and gas drilling operations to prevent drill tools from slipping during make-up and break-out. They can be used to secure flat joint pipes and drill collars. The caliper diameter range can be changed by adjusting the number of rings in the die sleeve. Typically, a pneumatic pump drives a hydraulic cylinder to adjust the number of rings, locking or releasing the caliper. However, due to the high fluctuations in the pneumatic pump, overpressure or underpressure in the hydraulic cylinder can occur, requiring precise operator adjustments. During operation, a shut-off valve must be opened and closed to ensure the safety slip is locked. If any component leaks, the safety slip becomes inoperable, hindering drilling operations. Furthermore, using a pneumatic pump to drive a large and heavy pneumatic-hydraulic booster cylinder, which in turn drives the safety slip, results in a complex structure and operation. This prevents quick locking and releasing of the safety slip, hindering maintenance. Furthermore, if the device becomes damaged or fails during use, it cannot be quickly disassembled and replaced, hindering subsequent operations. Therefore, it is necessary to design a safety slip locking and releasing device that is simple in structure, can be locked and released quickly, and is easy to maintain.

[0003] The Chinese utility model patent with publication number "CN219012532U" and titled "A Safety Slip for Oil Drilling that is Easy to Disassemble" provides a detachable safety slip that can adapt to pipes of different diameters. The safety slip has an anti-slip sleeve embedded in the groove structure, which is fixed in the groove by tightening bolts. At the same time, a buffer spring and a tension spring are installed on the top. By pressing on the top, the vibration caused by work can be reduced, thereby improving stability. After the two slip sleeves are fixed by tightening nuts, they are reinforced by rotating the handle and the second locking sleeve. The structural stability is further improved by the block and the movable groove, and it is easy to disassemble. Different from the patent, the safety slip of this application has a simpler structure and can be locked and released quickly, which is more convenient for pipeline construction and maintenance. Utility Model Content

[0004] The present invention aims to address at least one of the above-mentioned deficiencies in the prior art. For example, one of the purposes of the present invention is to provide a device that enables safety slips to be quickly locked and released, and another purpose of the present invention is to provide a safety slip that can be quickly locked and released.

[0005] In order to achieve the above-mentioned objectives, the utility model provides, on the one hand, a device for quickly locking and releasing a safety slip, which may include a hydraulic source, a hydraulic cylinder, a hydraulic lock, a hydraulic locking pipeline, a hydraulic unlocking pipeline, a piston rod and a reversing valve, wherein the hydraulic cylinder is connected to the piston rod, and the piston rod can pass through the slip connecting plate and lock the slip; a hydraulic lock is provided on the hydraulic cylinder, and the hydraulic lock is connected to the reversing valve through a hydraulic locking pipeline and a hydraulic unlocking pipeline arranged in parallel; the hydraulic source is connected to the reversing valve.

[0006] In one or more exemplary embodiments of one aspect of the present invention, the hydraulic source may include a hydraulic pump, an oil inlet pipeline and an oil return pipeline, and the hydraulic pump is connected to the reversing valve through the oil inlet pipeline and the oil return pipeline arranged in parallel.

[0007] In one or more exemplary embodiments of an aspect of the present invention, the hydraulic pump may include an implement hydraulic station.

[0008] In one or more exemplary embodiments of an aspect of the present invention, the reversing valve may include a manual reversing valve.

[0009] In one or more exemplary embodiments of one aspect of the present invention, a connecting sleeve may be provided at one end of the piston rod, and the connecting sleeve is detachably connected to the piston rod.

[0010] In one or more exemplary embodiments of one aspect of the present invention, a latch may be provided on the connecting sleeve.

[0011] In one or more exemplary embodiments of one aspect of the present invention, a piston rod protective cover may be provided on the rod body on the side of the piston rod close to the hydraulic cylinder.

[0012] In one or more exemplary embodiments of one aspect of the present invention, a press sleeve may be provided on the piston rod body, and the press sleeve is located on a side close to the piston rod protective sleeve.

[0013] On the other hand, the present invention provides a hydraulically driven safety slip, which may include a safety slip and a device for quickly locking and releasing the safety slip as described above, wherein the piston rod passes through one end of the safety slip and is fixed to the other end of the safety slip.

[0014] In one or more exemplary embodiments of another aspect of the present invention, one end of the piston rod can pass through a slip plate and be locked with another slip plate.

[0015] Compared with the prior art, the beneficial effects of the present invention include at least one of the following:

[0016] (1) The device for quickly locking and releasing the safety slips provided by the utility model can directly utilize the hydraulic station already present at the drilling site for hydraulic power supply, thereby achieving a stable power effect, and has a relatively simple structure and is easy to maintain;

[0017] (2) The device for quickly locking and releasing the safety slip provided by the present invention is provided with a hydraulic lock, which can ensure that the hydraulic power does not decay and the locking function does not fail in the event of a hydraulic source pressure drop or pipeline damage, thereby avoiding the serious consequences caused by the safety slip not being able to work normally due to overpressure or loss of pressure;

[0018] (3) The safety slip provided by the utility model is easy to operate and can quickly realize both locking and releasing functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects and / or features of the present invention will become more apparent from the following description in conjunction with the accompanying drawings, in which:

[0020] Figure 1 A schematic diagram of the overall structure of a safety slip of an exemplary embodiment is shown.

[0021] Description of main reference numerals:

[0022] 1-Hydraulic pump, 2-Oil return line, 3-Oil inlet line, 4-Reversing valve, 5-Hydraulic locking line, 6-Hydraulic unlocking line, 7-Hydraulic lock, 8-Cylinder, 9-Piston rod protection sleeve, 10-Pressure sleeve, 11-Slip connecting plate, 12-Piston rod, 13-Connecting sleeve, 14-Latch, 15-Safety slip. DETAILED DESCRIPTION

[0023] Hereinafter, a device for quickly locking and releasing safety slips and a hydraulically driven safety slip of the present invention will be described in detail with reference to exemplary embodiments.

[0024] In the description of this application, it should be understood that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense, for example, to mean a fixed connection, a detachable connection, or an integral connection; a direct connection, an indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0025] First Exemplary Embodiment

[0026] This exemplary embodiment provides a device for quickly locking and releasing safety slips.

[0027] In this exemplary embodiment, the device for quickly locking and releasing the safety slip primarily includes a hydraulic source, a hydraulic cylinder, a hydraulic lock, a hydraulic locking line, a hydraulic unlocking line, a piston rod, and a reversing valve. The hydraulic source is connected to the reversing valve, which in turn is connected to the hydraulic locking line and the hydraulic unlocking line. Specifically, the reversing valve may have two ports at the locations where the hydraulic locking line and the hydraulic unlocking line are connected. The ends of the hydraulic unlocking line and the hydraulic locking line, which are in the same direction, are each connected to a corresponding port to connect to the reversing valve. The reversing valve may include a manual reversing valve. The hydraulic cylinder is connected to the hydraulic unlocking line and the reversing valve via the hydraulic locking line, thereby connecting to the hydraulic source. The hydraulic cylinder is connected to the piston rod. A hydraulic lock is provided on the hydraulic cylinder, which is connected to the hydraulic locking line and the hydraulic unlocking line. Specifically, the ends of the hydraulic locking line and the hydraulic unlocking line, which are in the same direction, are connected to the hydraulic lock. The hydraulic lock effectively ensures that hydraulic power is not attenuated and the locking function is not lost in the event of a hydraulic source pressure drop or pipeline damage, thus preventing the serious consequences of safety slips not functioning properly due to overpressure or loss of pressure. To lock the safety slips, the reversing valve is operated, and the hydraulic source pumps hydraulic oil into the cylinder, pushing the piston rod. To release the safety slips, the reversing valve is reversed, causing the piston rod to move in the opposite direction, releasing the safety slips.

[0028] In this exemplary embodiment, the hydraulic source may include a hydraulic pump, an oil return line, and an oil inlet line. The oil return line and the oil inlet line are connected to the hydraulic pump, and a reversing valve is connected to the oil return line and the oil inlet line. The reversing valve may be provided with two additional ports at the location where the oil return line and the oil inlet line are connected. The oil inlet line and the oil return line are connected to the reversing valve via the ports.

[0029] In this exemplary embodiment, a connecting sleeve may be provided at one end of the piston rod, specifically, the piston rod locking slip. The piston rod and the connecting sleeve are detachably connected. If the piston rod or hydraulic locking line fails, the piston rod and the connecting sleeve can be detached to quickly disengage the piston rod from the safety slip. The safety slip can then be manually restored to its locking and release functions, or a functioning piston rod or hydraulic control assembly can be replaced.

[0030] In this exemplary embodiment, a pin is provided on the connecting sleeve, and the safety slip can be rotatably connected to the connecting sleeve through the pin, so that the safety slip can be adjusted when being buckled up or down to adapt to the pipe diameter.

[0031] In this exemplary embodiment, a piston rod protective sleeve may be mounted on the piston rod near the cylinder. This sleeve protects the piston rod from contaminants such as mud, ensuring a secure seal. Furthermore, a compression sleeve may be mounted on the piston rod near the piston rod protective sleeve. This sleeve transmits the locking force of the piston rod to the safety slip body, thereby locking the tubing string.

[0032] In this exemplary embodiment, the hydraulic pump may include a machine hydraulic station, which is equipped with a pressure regulating valve. The pressure regulating valve has the function of adjusting the supply pressure. During on-site construction, the hydraulic oil pressure can be set in advance, and the hydraulic cylinder can be connected to the machine hydraulic station through a quick connector. The machine hydraulic station can provide a stable power source for the hydraulic cylinder.

[0033] Second Exemplary Embodiment

[0034] The present exemplary embodiment provides a hydraulically driven safety slip.

[0035] Figure 1 The schematic diagram of the overall structure of the safety slip of an exemplary embodiment is shown below. Figure 1 The hydraulically driven safety slips of this exemplary embodiment will be described.

[0036] In this exemplary embodiment, Figure 1 As shown in , the safety slips (hydraulic driven safety slips) mainly include safety slips and the device for quickly locking and releasing the safety slips as described in the first exemplary embodiment above.

[0037] The device for quickly locking and releasing the safety slips primarily includes a hydraulic source, a cylinder 8, a hydraulic lock 7, a hydraulic locking line 5, a hydraulic unlocking line 6, a piston rod 12, and a reversing valve 4. The hydraulic source is connected to the reversing valve 4, which in turn is connected to the hydraulic locking line 5 and the hydraulic unlocking line 6. Specifically, the reversing valve 4 may have two ports at the locations where the hydraulic locking line 5 and the hydraulic unlocking line 6 are connected. The hydraulic unlocking line 6 and the hydraulic locking line 5 are each connected to a corresponding port to connect to the reversing valve 4. The cylinder 8 is connected to the hydraulic unlocking line 6 and the reversing valve 4 via the hydraulic locking line 5, thereby connecting to the hydraulic source. The cylinder 8 is connected to the piston rod 12. The hydraulic lock 7 is mounted on the cylinder 8, which is connected to the hydraulic locking line 5 and the hydraulic unlocking line 6. The hydraulic lock 7 effectively ensures that hydraulic power is not attenuated and the locking function is not lost in the event of a hydraulic source pressure drop or pipeline damage, thereby preventing the serious consequences of safety slips not functioning properly due to overpressure or loss of pressure. To lock the safety slips 15, the reversing valve 4 is operated, and the hydraulic source pumps hydraulic oil into the cylinder 8, pushing the piston rod 12. To release the safety slips 15, the reversing valve 4 is reversed, causing the piston rod 12 to move in the opposite direction, releasing the safety slips 15.

[0038] In this exemplary embodiment, Figure 1As shown in FIG, the hydraulic source may include a hydraulic pump 1, an oil return line 2, and an oil inlet line 3. The oil return line 2 and the oil inlet line 3 are connected to the hydraulic pump 1, and a reversing valve 4 is connected to the oil return line 2 and the oil inlet line 3. Here, the reversing valve 4 may further be provided with two ports at the position where the oil return line 2 and the oil inlet line 3 are connected. The oil inlet line 3 and the oil return line 2 are connected to the reversing valve 4 through these two ports.

[0039] In this exemplary embodiment, Figure 1 As shown in FIG, a connecting sleeve 13 may be provided at one end of the piston rod 12, that is, a connecting sleeve 13 is provided at one end of the piston rod 12 locking slip. The piston rod 12 and the connecting sleeve 13 are detachably connected. When the piston rod 12 or a component such as the hydraulic locking pipeline 5 fails, the piston rod 12 and the connecting sleeve 13 can be detached to quickly disengage the piston rod 12 from the safety slip 15. After disengagement, the safety slip 15 can be manually operated to restore the locking and releasing functions, or a normally functioning piston rod or hydraulic control component can be replaced.

[0040] In this exemplary embodiment, Figure 1 As shown in FIG, a latch 14 is provided on the connecting sleeve 13, and the safety slip 15 can be rotatably connected to the connecting sleeve 13 through the latch 14, so that the safety slip 15 can be adjusted when buckled up or down to adapt to the pipe diameter.

[0041] In this exemplary embodiment, Figure 1 As shown in FIG, a piston rod protective sleeve 9 may be mounted on the piston rod 12 near the hydraulic cylinder 8. This sleeve protects the piston rod 12 from contaminants such as mud, ensuring its sealing performance. Furthermore, a compression sleeve 10 may be mounted on the piston rod 12 near the piston rod protective sleeve 9. This sleeve transmits the locking force of the piston rod 12 to the safety slip 15, thereby locking the tubing string.

[0042] In this exemplary embodiment, Figure 1 As shown in FIG, the piston rod 12 passes through the slip plate 11 at one end of the safety slip and is secured to the slip plate 11 at the other end of the safety slip 15. Specifically, the slip plate 11 at the other end of the safety slip 15 is secured to the connecting sleeve 13 via a latch 14. The piston rod 12 passes through the slip plate 11 at one end of the safety slip 15 and is secured to the connecting sleeve 13, thereby securing the piston rod 12 to the slip plate 11 at the other end of the safety slip 15.

[0043] The locking process of the hydraulically driven safety slips of the present invention may include: assembling the hydraulically driven safety slips, operating the reversing valve, and using a hydraulic pump to pump hydraulic oil into the cylinder to drive the piston rod to move, and the contraction of the piston rod drives the safety slips to lock. In particular, when the hydraulic source fails and / or the pipeline ruptures, resulting in other failures, the hydraulic lock can cause the piston rod to be in a retracted state, ensuring that the safety slips are locked. Furthermore, when the safety slips need to be released, the reversing valve can be operated in reverse to change the direction of movement of the piston rod, and the extension of the piston rod can drive the release of the safety slips. Similarly, when the hydraulic source fails, because a hydraulic lock is provided, the hydraulic lock can keep the piston rod in an extended state, ensuring that the safety slips are always in a released state.

[0044] In summary, the advantages of the present invention may include at least one of the following:

[0045] (1) The device for quickly locking and releasing the safety slip provided by the utility model can quickly realize the functions of releasing and locking the safety slip;

[0046] (2) The device for quickly locking and releasing the safety slips provided by the present invention is equipped with a reversing valve, which can quickly achieve both locking and releasing functions;

[0047] (3) The safety slip provided by the present invention is detachably connected to the device for quickly locking and releasing the safety slip. When components such as the piston rod or the hydraulic locking pipeline fail, the safety slip can be quickly separated from the piston rod for maintenance.

[0048] Although the above description of a device for quickly locking and releasing a safety slip and a hydraulically driven safety slip of the present invention has been provided in conjunction with exemplary embodiments, it should be clear to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope defined by the claims.

Claims

1. A device for quickly locking and releasing safety slips, characterized in that: The device includes a hydraulic source, a hydraulic cylinder, a hydraulic lock, a hydraulic locking pipeline, a hydraulic unlocking pipeline, a piston rod and a reversing valve, wherein: The hydraulic cylinder is connected to the piston rod, which can pass through the slip connecting plate and lock the slip; a hydraulic lock is provided on the hydraulic cylinder, and the hydraulic lock is connected to the reversing valve through a hydraulic locking pipeline and a hydraulic unlocking pipeline arranged in parallel; the hydraulic source is connected to the reversing valve.

2. The device for quickly locking and releasing safety slips according to claim 1, characterized in that: The hydraulic source includes a hydraulic pump, an oil inlet pipeline and an oil return pipeline. The hydraulic pump is connected to the reversing valve through the oil inlet pipeline and the oil return pipeline arranged in parallel.

3. The device for quickly locking and releasing safety slips according to claim 2, characterized in that: The hydraulic pump comprises an implement hydraulic station.

4. The device for quickly locking and releasing safety slips according to claim 1, characterized in that: The reversing valve includes a manual reversing valve.

5. The device for quickly locking and releasing safety slips according to claim 1, characterized in that: A connecting sleeve is provided at one end of the piston rod, and the connecting sleeve is detachably connected to the piston rod.

6. The device for quickly locking and releasing safety slips according to claim 5, characterized in that: The connecting sleeve is provided with a latch.

7. The device for quickly locking and releasing safety slips according to claim 1, characterized in that: A piston rod protective sleeve is sleeved on the rod body of the piston rod close to the hydraulic cylinder.

8. The device for quickly locking and releasing safety slips according to claim 7, characterized in that: A pressing sleeve is sleeved on the piston rod body, and the pressing sleeve is located on a side close to the piston rod protective sleeve.

9. A hydraulically driven safety slip, characterized in that: The hydraulically driven safety slip comprises a safety slip and a device for quickly locking and releasing the safety slip as claimed in any one of claims 1 to 8, and the piston rod passes through one end of the safety slip and is fixed to the other end of the safety slip.

10. The hydraulically driven safety slip according to claim 9, characterized in that: One end of the piston rod passes through a slip connecting plate and is locked with another slip connecting plate.

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