Device for preventing shearing flashboard of blowout preventer from being closed by mistake

Abstract

The utility model discloses a device for preventing a shearing flashboard of a blowout preventer from being closed by mistake, which comprises a sensor component arranged at a wellhead and used for monitoring the condition of a drilling tool in a well, and a telescopic rod component arranged at an operating handle of the shearing flashboard of the blowout preventer and used for locking the operating handle, the sensor assembly is electrically connected with the telescopic rod assembly. According to the utility model, the situation that the misoperation of the shut-in device shear flashboard can only be avoided through personnel experience and daily consciousness training in the past is changed, specifically, the sensor assembly is used for monitoring the condition of a drilling tool in a well and generating a signal to control the action of the telescopic rod assembly, so that the locking and unlocking of the shut-in device shear flashboard operation handle in a remote control room are realized; therefore, the effect of preventing misoperation is achieved, and the safety of a drilling tool and equipment is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of wellhead equipment safety in oilfield drilling operations, and in particular relates to a device for preventing a shear gate of a well sealer from being mistakenly closed. Background Art

[0002] With the rapid development of the oil drilling industry, it is crucial to ensure the safety of oil drilling operations, reduce accident risks, and protect the lives and property of personnel. It is difficult to ensure that there will be no mistakes by relying solely on the operation and awareness of personnel, so more automated safety equipment is needed as a guarantee.

[0003] The shear gate of the well sealer is an important well control equipment at the wellhead. The function of the shear gate is to forcibly cut the drill pipe in the well in an emergency situation (such as uncontrolled blowout, blowout fire, etc.) to achieve the purpose of sealing the well. However, the shear gate is often misoperated during normal well control exercises. Once the shear gate is misoperated, it will cause serious accidents such as drilling tools falling into the well and equipment damage, which is difficult to deal with later. Therefore, how to prevent the misoperation of the shear gate is an urgent problem to be solved. Utility Model Content

[0004] The utility model provides a device for preventing the shear gate of a well sealer from being closed by mistake, so as to achieve the purpose of preventing drilling tool accidents or other more serious accidents caused by mistaken operation when there are drilling tools in the well.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a device for preventing the accidental closure of the shear gate of a wellbore sealer, comprising a sensor assembly arranged at the wellhead for monitoring the condition of the drilling tool in the well, and a telescopic rod assembly arranged at the operating handle of the shear gate of the wellbore sealer for locking the operating handle, wherein the sensor assembly is electrically connected to the telescopic rod assembly.

[0006] As a limitation of the present utility model, the telescopic rod assembly includes a support, a telescopic rod mounted on the support, and a solenoid valve for controlling the movement of the telescopic rod;

[0007] The operating handle is provided with a limiting hole;

[0008] The working end of the telescopic rod faces the limiting hole and can extend into the limiting hole to lock the operating handle.

[0009] As a further limitation of the present invention, the solenoid valve is electrically connected to the sensor assembly via a signal encoder.

[0010] As a further limitation of the present invention, an emergency switch is also included for directly controlling the solenoid valve.

[0011] As a further limitation of the present invention, the emergency switch includes a driller console solenoid valve forced switch, a remote control room solenoid valve forced switch and an auxiliary console solenoid valve forced switch.

[0012] As another limitation of the present invention, at least one set of the sensor assembly is arranged at the wellhead, each set includes an infrared transmitter, an infrared receiver and a reflective plate, and the reflective plate is arranged radially opposite to the infrared transmitter and the infrared receiver along the wellhead.

[0013] As a further limitation of the present invention, two sets of the sensor components are arranged at the wellhead at intervals in the upper and lower directions, and the two sets of the sensor components are staggered by 90 degrees in the circumferential direction of the wellhead.

[0014] As a further limitation of the present invention, two sets of the sensor components are arranged below the drilling floor, and the two sets of the sensor components are spaced 15 cm apart from top to bottom.

[0015] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0016] (1) The utility model changes the previous situation where the accidental operation of the shear gate of the well sealer can only be avoided through personnel experience and daily awareness training. Specifically, the sensor component monitors the drilling tool situation in the well, generates a signal to control the movement of the telescopic rod component, and realizes the locking and unlocking of the shear gate operating handle of the well sealer in the remote control room, thereby achieving the effect of preventing accidental operation and ensuring the safety of drilling tools and equipment.

[0017] (2) The utility model is provided with a forced switch on the driller's console, the remote control room and the auxiliary console. In an emergency or when a connection failure occurs between the sensor assembly and the telescopic rod assembly, the forced switch can be used to unlock the operating handle.

[0018] (3) The utility model sets two staggered sets of sensor assemblies at the wellhead. The solenoid valve can be controlled to work to unlock the operating handle only when the two sets of sensor assemblies receive signals at the same time. This arrangement can eliminate the influence of the drilling tool not being centered on the monitoring accuracy of a single set of sensor assemblies. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Figure 1 It is a principle diagram of an embodiment of the utility model;

[0021] In the figure: 1. Wellhead; 2. Reflection plate; 3. Infrared transmitter; 4. Infrared receiver; 5. Support; 6. Telescopic rod; 7. Operating handle; 8. Three-position four-way valve. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and understand the present invention, and are not used to limit the present invention.

[0023] When there is a drilling tool in the well, the embodiment can automatically lock the operating handle 7 of the shear gate of the well plugging device to ensure that it will not be operated by mistake, and in an emergency, the operating handle 7 can be unlocked with just one step. Figure 1 As shown, this embodiment includes a sensor assembly, a telescopic rod assembly and an emergency switch.

[0024] At least one sensor assembly is arranged at the wellhead 1 where the shear gate of the well plugging device is installed, and is used to detect the status of the drilling tools in the well. Each sensor assembly includes an infrared transmitter 3, an infrared receiver 4 and a reflector 2. Among them, the infrared transmitter 3 and the infrared receiver 4 are fixed on the same side of the wellhead 1; the reflector 2 is fixed on the opposite side, and is arranged radially opposite to the infrared transmitter 3 and the infrared receiver 4 along the wellhead 1. When working, the infrared rays emitted by the infrared transmitter 3 are reflected by the reflector 2 and received by the infrared receiver 4.

[0025] Furthermore, the sensor assembly is arranged below the drilling table of the wellhead 1. Specifically, two brackets are welded below the drilling table and are radially opposite to each other along the wellhead 1, a reflector plate 2 is installed on one of the brackets, and an infrared transmitter 3 and an infrared receiver 4 are installed on the other bracket.

[0026] In order to eliminate the influence of the drilling tool misalignment on the monitoring accuracy of a single set of sensor components, two sets of sensor components are arranged at the wellhead 1 in this embodiment, such as Figure 1 As shown, the two sets of sensor assemblies are staggered 90 degrees in the circumferential direction of the wellhead 1. In addition, the two sets of sensor assemblies are arranged in an upper and lower interval along the well depth direction to prevent signal interference between the two sets of instruments. In this embodiment, the upper and lower height difference of the two sets of sensor assemblies is 15 cm.

[0027] The telescopic rod assembly is arranged at the shear gate operating handle 7 of the well sealing device in the remote control room, and is electrically connected to the above-mentioned sensor assembly. After receiving the signal of the sensor assembly, it performs corresponding actions to lock or unlock the operating handle 7. Figure 1 As shown, the telescopic rod assembly includes a support 5, a telescopic rod 6 mounted on the support 5, and a solenoid valve for controlling the movement of the telescopic rod 6. The telescopic rod 6 is a hydraulic telescopic rod 6 or a pneumatic telescopic rod 6, and the movement output end is its working end. In this embodiment, the telescopic rod 6 is a hydraulic telescopic rod 6.

[0028] It should be noted that the operating handle 7 of the shear gate of the well plugging device is a handle of a three-position four-way valve 8, and a limit hole is provided on the handle. The telescopic rod 6 is horizontally assembled on the support 5, and the working end faces the limit hole of the operating handle 7. The working end of the telescopic rod 6 can be extended into the limit hole to achieve locking of the operating handle 7.

[0029] The solenoid valve is an existing structure, including a solenoid valve body mounted on the hydraulic pipeline of the telescopic rod 6 and a solenoid valve switch connected to the solenoid valve body. Of course, the solenoid valve is also equipped with a corresponding power supply and circuit switch. Figure 1 As shown, in this embodiment, the electromagnetic valve switch is electrically connected to the above-mentioned sensor assembly through a signal encoder. In addition, the above-mentioned two sets of sensor assemblies form a series control on the electromagnetic valve switch through the signal encoder.

[0030] During operation, if the two sets of sensor assemblies do not detect the presence of drilling tools in the well, the two sets of sensor assemblies transmit signals to the signal encoder at the same time, the signal encoder works to turn on the solenoid valve switch, the solenoid valve works, the working end of the telescopic rod 6 is retracted, and the operating handle 7 is unlocked;

[0031] If one of the sensor assemblies detects the presence of drilling tools in the well, or if both sensor assemblies detect the presence of drilling tools in the well, the solenoid valve switch cannot be opened through the signal encoder, the solenoid valve is in a closed state, the working end of the telescopic rod 6 is always in an extended state, and is located in the limit hole of the operating handle 7, thereby locking the operating handle 7.

[0032] More specifically, in this embodiment, emergency switches for directly manually controlling the solenoid valve are provided at the driller's room, the remote control room and the auxiliary control console, including the driller's console solenoid valve forced switch, the remote control room solenoid valve forced switch and the auxiliary control console solenoid valve forced switch, which can control the solenoid valve separately. When the control system fails or in an emergency, the solenoid valve switch can be turned on by the emergency switch to make the solenoid valve work, the working end of the telescopic rod 6 is retracted, and the operating handle 7 is unlocked.

[0033] It should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A device for preventing the shear gate of a well plug from being accidentally closed, characterized in that: It comprises a sensor assembly arranged at the wellhead for monitoring the status of the drilling tool in the well, and a telescopic rod assembly arranged at the operating handle of the shear gate of the well plugging device for locking the operating handle. The sensor assembly is electrically connected to the telescopic rod assembly.

2. A device for preventing the shear gate of a well plugging device from being accidentally closed according to claim 1, characterized in that: The telescopic rod assembly includes a support, a telescopic rod mounted on the support, and a solenoid valve for controlling the movement of the telescopic rod; The operating handle is provided with a limiting hole; The working end of the telescopic rod faces the limiting hole and can extend into the limiting hole to lock the operating handle.

3. A device for preventing the shear gate of a well plugging device from being accidentally closed according to claim 2, characterized in that: The solenoid valve is electrically connected to the sensor assembly via a signal encoder.

4. A device for preventing the shear gate of a well plugging device from being mistakenly closed according to claim 2 or 3, characterized in that: Also included is an emergency switch for directly controlling the solenoid valve.

5. A device for preventing the shear gate of a well plugging device from being accidentally closed according to claim 4, characterized in that: The emergency switch includes a driller console solenoid valve forced switch, a remote control room solenoid valve forced switch and an auxiliary console solenoid valve forced switch.

6. A device for preventing the shear gate of a well plugging device from being accidentally closed according to any one of claims 1 to 3 and 5, characterized in that: At least one set of the sensor assembly is arranged at the wellhead, each set includes an infrared transmitter, an infrared receiver and a reflective plate, and the reflective plate is arranged opposite to the infrared transmitter and the infrared receiver along the wellhead radial direction.

7. A device for preventing the shear gate of a well plugging device from being accidentally closed according to claim 6, characterized in that: Two sets of the sensor components are arranged at intervals in the upper and lower parts at the wellhead, and the two sets of the sensor components are staggered by 90 degrees in the circumferential direction of the wellhead.

8. The device for preventing the shear gate of a well plugging device from being accidentally closed according to claim 7, characterized in that: Two sets of the sensor assemblies are arranged below the drilling floor, and the two sets of the sensor assemblies are spaced 15 cm apart from each other.

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