Drilling hydraulic cathead limiting device and method
By designing a limit device in the hydraulic cat head, using the rotation number detection and the combination of the electromagnetic pressure relief valve, the problem of the hydraulic cat head drum being out of control is solved, and safe and reliable drilling operation is achieved.
Patent Information
- Application Number
- CN202311075789.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-24
- Publication Date
- 2025-02-25
AI Technical Summary
When the hydraulic cat head is working and running, the roller sometimes loses control and cannot be stopped, causing the roller to rotate continuously, causing safety hazards.
Design a drilling hydraulic cat head limit device, including a rotation number detection device, a controller and an electromagnetic pressure relief valve. By detecting the number of rotations of the drum, when the preset number of rotations is reached, the solenoid pressure relief valve is controlled to open, causing the hydraulic supply to stop, causing the drum to stop rotating.
It effectively solves the problem of hydraulic cat head roller rotating continuously, eliminates safety hazards, and ensures personnel and production safety.
Smart Images
Figure CN119507826A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of drilling equipment, in particular to a drilling hydraulic cathead limiting device and a limiting method. Background Art
[0002] The hydraulic cathead is one of the important equipment in drilling production. Its main task is to make the buckle when drilling. Some drill pipe joints are very tight due to the high temperature downhole, and the buckle cannot be removed, which affects the timeliness of drilling construction. At this time, the hydraulic cathead is used to make the drill pipe thread buckle, which can easily remove the thread buckle. However, the hydraulic cathead currently used has design defects. During operation, the rotation of the drum is sometimes out of control and the drum cannot be stopped, causing the drum to keep rotating, resulting in the B-type tongs tail rope being tightened or even broken, posing a safety hazard. Summary of the invention
[0003] The invention provides a drilling hydraulic cathead limiting device and limiting method, which are used to solve the problem that a hydraulic cathead fails and a roller keeps rotating.
[0004] The present invention provides a drilling hydraulic cathead limiting device, comprising a rotation number detection device, a controller and an electromagnetic pressure relief valve; the rotation number detection device is configured to detect the rotation number of a hydraulic cathead drum, and feeds back a signal to the controller when the rotation number of the drum reaches a preset number of rotations; the controller is respectively connected to the rotation number detection device and the electromagnetic pressure relief valve, and the controller is configured to control the opening and closing of the electromagnetic pressure relief valve according to the signal; the electromagnetic pressure relief valve is used to control the hydraulic supply of the hydraulic cathead.
[0005] In one embodiment, the electromagnetic pressure relief valve is installed between the oil supply line and the oil return line of the hydraulic cathead, and the controller is constructed to control the opening of the electromagnetic pressure relief valve when receiving a signal from the rotation number detection device, so that the hydraulic oil in the oil supply line can enter the oil return line through the electromagnetic pressure relief valve.
[0006] In one embodiment, the rotation number detection device includes a rotation number sensor and a rotation number counter connected to each other, the rotation number sensor is used to detect the rotation number of the roller of the hydraulic cathead; the rotation number counter is constructed to compare the rotation number of the roller with the preset number of rotations, and when the rotation number is greater than or equal to the preset number of rotations, a signal is fed back to the controller.
[0007] In one embodiment, the rotation number detection device is further connected to a rotation number setting device, and the rotation number setting device is used to set a preset number of rotations and feed back a signal to the rotation number detection device.
[0008] In one embodiment, it also includes a drum extension shaft, which is located outside the drum and fixedly installed on the rotating shaft of the drum, and the rotation number detection device is used to detect the rotation number of the drum extension shaft.
[0009] The present invention also provides a drilling hydraulic cathead limiting method, which detects the number of rotations of the hydraulic cathead drum. When the number of rotations of the drum reaches a preset number, the pressure supply pipeline of the hydraulic cathead stops providing hydraulic pressure to the hydraulic cathead, thereby stopping the rotation of the drum.
[0010] In one embodiment, making the pressure supply line of the hydraulic cathead stop supplying hydraulic pressure to the hydraulic cathead includes the following steps: connecting the oil supply line and the oil return line of the hydraulic cathead, so that the hydraulic oil in the oil supply line does not enter the hydraulic cathead but directly enters the oil return line, so that the pressure supply line stops supplying hydraulic pressure to the hydraulic cathead.
[0011] In one embodiment, an electromagnetic pressure relief valve is installed between the oil supply line and the oil return line of the hydraulic cathead. When the number of rotations of the drum reaches a preset number of rotations, the electromagnetic pressure relief valve is controlled to open, and the hydraulic oil in the oil supply line enters the oil return line through the electromagnetic pressure relief valve, thereby causing the pressure supply line to stop providing hydraulic pressure to the hydraulic cathead.
[0012] In one embodiment, the number of rotations of the roller of the hydraulic cathead is detected by a rotation sensor, and the number of rotations of the roller is compared with the preset number of rotations by a rotation counter. When the number of rotations is greater than or equal to the preset number of rotations, the rotation counter feeds back a signal to a controller, and the controller controls the opening of the electromagnetic pressure relief valve after receiving the signal.
[0013] In one embodiment, detecting the number of rotations of the hydraulic cathead drum includes the following steps: fixing a drum extension shaft on the rotating shaft of the drum so that the drum extension shaft is located outside the drum, and obtaining the number of rotations of the drum by detecting the number of rotations of the drum extension shaft.
[0014] Compared with the prior art, the drilling hydraulic cathead limiting method has the advantage that, by detecting the number of revolutions of the hydraulic cathead drum, when the number of revolutions of the drum reaches a preset number, the pressure supply pipeline of the hydraulic cathead stops supplying hydraulic pressure to the hydraulic cathead, and the drum stops rotating, thereby solving the problem that the drum keeps rotating when the hydraulic cathead fails, eliminating safety hazards, and ensuring personnel and safe production. The drilling hydraulic cathead limiting device provided by the present invention has a simple structure and is easy to operate. Before use, it only needs to pre-set the preset number of revolutions of the drum to solve the problem that the drum keeps rotating when the hydraulic cathead fails, eliminating safety hazards, and ensuring personnel and safe production. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Hereinafter, the present invention will be described in more detail based on embodiments and with reference to the accompanying drawings.
[0016] Figure 1 2 is a schematic diagram of the three-dimensional structure of a drilling hydraulic cathead limiting device in an embodiment of the present invention;
[0017] Figure 2 2 is a schematic diagram of the structure of the drilling hydraulic cathead limiting device in a top view according to an embodiment of the present invention;
[0018] Figure 3 It is a flow chart of a drilling hydraulic cathead limiting method in an embodiment of the present invention.
[0019] Reference numerals:
[0020] 1. Roller extension shaft; 2. Turns setting device; 3. Turns counter; 4. Turns sensor; 5. Controller; 6. Solenoid pressure relief valve; 7. Oil supply pipeline; 8. Oil return pipeline. DETAILED DESCRIPTION
[0021] The present invention will be further described below in conjunction with the accompanying drawings.
[0022] Embodiment 1
[0023] like Figure 1 , Figure 2 As shown, the present invention provides a drilling hydraulic cathead limit device including a circle number setting device 2, a rotation circle number detection device, a controller 5 and an electromagnetic pressure relief valve 6.
[0024] The number of revolutions setting device 2 is used to set the number of revolutions of the hydraulic cathead drum (i.e., to set the preset number of revolutions), and to feed back a signal to the number of revolutions detection device. When the hydraulic cathead is used to make a hole breakout, the tension value applied to the drill pipe joint is related to the number of revolutions of the hydraulic cathead drum; the preset number of revolutions in the drilling hydraulic cathead limit device can be determined according to the tension value reached when the drill pipe joint is broken out during drilling. When the breakout reaches the tension value, the drill pipe joint is broken out and the action is completed.
[0025] In some embodiments, in order to facilitate the detection of the number of rotations of the drum, a drum extension shaft 1 is provided on the outside of the drum, and the drum extension shaft 1 is fixedly mounted on the rotating shaft of the drum. The drum extension shaft 1 is coaxially arranged with the rotating shaft of the drum and rotates synchronously. The number of rotations of the drum is obtained by detecting the number of rotations of the drum extension shaft 1.
[0026] The rotation number detection device is used to detect the rotation number of the hydraulic cathead drum. Specifically, the rotation number detection device mainly consists of two parts: a rotation number sensor 4 and a rotation number counter 3. Among them, the rotation number sensor 4 is used to detect the rotation number of the hydraulic cathead drum, and feed back the signal corresponding to the rotation number of the drum to the rotation number counter 3; the rotation number counter 3 is connected to the rotation number sensor 4 and the rotation number setting device 2 respectively, and the rotation number counter 3 is used to compare the rotation number of the drum with the preset number of rotations. When the rotation number of the drum is greater than or equal to the preset number of rotations, the rotation number counter 3 outputs a signal to the controller. When the drum extension shaft 1 is fixedly installed on the rotating shaft of the drum, the rotation number sensor 4 is installed on the side of the drum extension shaft 1, and the rotation number of the drum is obtained by detecting the rotation number of the drum extension shaft 1, and a signal is output externally when the rotation number of the drum reaches the preset number of rotations.
[0027] The controller 5 is connected to the electromagnetic pressure relief valve 6 and the rotation number counter 3 in the rotation number detection device. When the controller 5 receives the signal from the rotation number counter 3, the controller 5 quickly transmits the signal to the electromagnetic pressure relief valve 6.
[0028] The electromagnetic pressure relief valve 6 is used to control the hydraulic supply of the hydraulic cathead. In some embodiments, the electromagnetic pressure relief valve 6 is installed between the oil supply line 7 and the oil return line 8 of the hydraulic cathead. When the electromagnetic pressure relief valve 6 is closed, the hydraulic oil in the oil supply line 7 provides oil pressure to the hydraulic cathead; and when the electromagnetic pressure relief valve 6 receives a signal from the controller 5, the electromagnetic pressure relief valve 6 opens quickly to connect the oil supply line 7 and the oil return line 8 of the hydraulic cathead. The hydraulic oil in the oil supply line 7 does not enter the hydraulic cathead but directly enters the oil return line 8 through the electromagnetic pressure relief valve 6 and returns to the hydraulic station tank, so that the pressure supply line stops providing hydraulic pressure to the hydraulic cathead, thereby stopping the rotation of the roller of the hydraulic cathead.
[0029] Embodiment 2
[0030] The invention provides a drilling hydraulic cathead limiting method, which detects the number of rotations of a hydraulic cathead drum. When the number of rotations of the drum reaches a preset number, the pressure supply pipeline of the hydraulic cathead stops providing hydraulic pressure to the hydraulic cathead, thereby stopping the rotation of the drum.
[0031] like Figure 3 As shown, the specific steps of the drilling hydraulic cathead limiting method include:
[0032] 1) Check the number of revolutions of the hydraulic cathead drum
[0033] Specifically, the number of revolutions of the drum of the hydraulic cathead is detected by the revolution sensor 4, and a signal corresponding to the number of revolutions of the drum is fed back to the revolution counter 3; in order to facilitate the detection of the number of revolutions of the drum, a drum extension shaft 1 can be arranged outside the drum, the drum extension shaft 1 is fixedly mounted on the rotating shaft of the drum, the drum extension shaft 1 is coaxially arranged with the rotating shaft of the drum and rotates synchronously, the revolution detection device is used to detect the number of revolutions of the drum extension shaft 1, and the number of revolutions of the drum is obtained by detecting the number of revolutions of the drum extension shaft 1;
[0034] 2) Determine whether the number of rotations of the drum reaches the preset number of rotations
[0035] Specifically, the number of revolutions of the drum during operation is compared with the preset number of revolutions through the revolution counter 3. When the number of revolutions is greater than or equal to the preset number of revolutions, it is determined that the number of revolutions of the drum has reached the preset number of revolutions. Before the positioning device works, the preset number of revolutions can be set and displayed through the revolution setting device 2 connected to the revolution counter 3. The preset number of revolutions can be determined according to the tension value reached when the drill pipe joint is unfastened during drilling.
[0036] 3) When the drum rotates to the preset number of times, the pressure supply pipeline of the hydraulic cathead stops supplying hydraulic pressure to the hydraulic cathead, thereby stopping the drum from rotating.
[0037] The supply of hydraulic pressure of the hydraulic cathead is controlled by the controller 5 and the electromagnetic pressure relief valve 6. Specifically, the electromagnetic pressure relief valve 6 is installed between the oil supply pipeline 7 and the oil return pipeline 8 of the hydraulic cathead, and the opening and closing of the electromagnetic pressure relief valve 6 is controlled by the controller 5. When the number of revolutions of the drum reaches the preset number of revolutions, the revolution counter 3 feeds back a signal to the controller 5. After the controller 5 receives the signal fed back by the revolution counter 3, the controller 5 quickly transmits the signal to the electromagnetic pressure relief valve 6. When the electromagnetic pressure relief valve 6 receives the signal from the controller 5, the electromagnetic pressure relief valve 6 quickly opens, so that the oil supply pipeline 7 and the oil return pipeline 8 of the hydraulic cathead are connected. The hydraulic oil in the oil supply pipeline 7 does not enter the hydraulic cathead but directly enters the oil return pipeline 8 through the electromagnetic pressure relief valve 6, and returns to the hydraulic station tank, so that the pressure supply pipeline stops providing hydraulic pressure to the hydraulic cathead. The hydraulic cathead has no pressure supply, and the drum stops rotating quickly, eliminating safety hazards and achieving the purpose of safe operation.
[0038] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A drilling hydraulic cathead limit device, characterized in that: It includes a rotation number detection device, a controller and an electromagnetic pressure relief valve; the rotation number detection device is constructed to detect the rotation number of the hydraulic cathead roller, and feedback a signal to the controller when the rotation number of the roller reaches a preset number of circles; the controller is respectively connected to the rotation number detection device and the electromagnetic pressure relief valve, and the controller is constructed to control the opening and closing of the electromagnetic pressure relief valve according to the signal; the electromagnetic pressure relief valve is used to control the hydraulic supply of the hydraulic cathead.
2. The drilling hydraulic cathead limiting device according to claim 1, characterized in that: The electromagnetic pressure relief valve is installed between the oil supply pipeline and the oil return pipeline of the hydraulic cathead. The controller is constructed to control the opening of the electromagnetic pressure relief valve when receiving a signal from the rotation number detection device, so that the hydraulic oil in the oil supply pipeline can enter the oil return pipeline through the electromagnetic pressure relief valve.
3. The drilling hydraulic cathead limiting device according to claim 1, characterized in that: The rotation number detection device includes a rotation number sensor and a rotation number counter connected to each other. The rotation number sensor is used to detect the rotation number of the roller of the hydraulic cathead; the rotation number counter is constructed to compare the rotation number of the roller with the preset number of rotations, and when the rotation number is greater than or equal to the preset number of rotations, a signal is fed back to the controller.
4. The drilling hydraulic cathead limiting device according to claim 1, characterized in that: The rotation number detection device is also connected to a rotation number setting device, and the rotation number setting device is used to set a preset number of rotations and feed back a signal to the rotation number detection device.
5. The drilling hydraulic cathead limiting device according to any one of claims 1 to 4, characterized in that: It also includes a roller extension shaft, which is located outside the roller and fixedly installed on the rotating shaft of the roller. The rotation number detection device is used to detect the rotation number of the roller extension shaft.
6. A drilling hydraulic cathead limiting method, characterized in that: The number of revolutions of the hydraulic cathead drum is detected. When the number of revolutions of the drum reaches a preset number, the pressure supply pipeline of the hydraulic cathead stops supplying hydraulic pressure to the hydraulic cathead, thereby stopping the rotation of the drum.
7. The drilling hydraulic cathead limiting method according to claim 6, characterized in that: The method stops the pressure supply pipeline of the hydraulic cathead from providing hydraulic pressure to the hydraulic cathead, comprising the following steps: connecting the oil supply pipeline and the oil return pipeline of the hydraulic cathead, so that the hydraulic oil in the oil supply pipeline does not enter the hydraulic cathead but directly enters the oil return pipeline, so that the pressure supply pipeline stops providing hydraulic pressure to the hydraulic cathead.
8. The drilling hydraulic cathead limiting method according to claim 6 or 7, characterized in that: An electromagnetic pressure relief valve is installed between the oil supply pipeline and the oil return pipeline of the hydraulic cathead. When the number of rotations of the drum reaches a preset number, the electromagnetic pressure relief valve is controlled to open, and the hydraulic oil in the oil supply pipeline enters the oil return pipeline through the electromagnetic pressure relief valve, thereby causing the pressure supply pipeline to stop providing hydraulic pressure to the hydraulic cathead.
9. The drilling hydraulic cathead limiting method according to claim 8, characterized in that: The number of rotations of the roller of the hydraulic cathead is detected by a rotation sensor, and the number of rotations of the roller is compared with the preset number of rotations by a rotation counter. When the number of rotations is greater than or equal to the preset number of rotations, the rotation counter feeds back a signal to the controller, and the controller controls the opening of the electromagnetic pressure relief valve after receiving the signal.
10. The drilling hydraulic cathead limiting method according to claim 6, characterized in that: Detect the number of revolutions of the hydraulic cathead drum. The method comprises the following steps: fixing a roller extension shaft on the rotating shaft of the roller so that the roller extension shaft is located outside the roller, and obtaining the number of rotations of the roller by detecting the number of rotations of the roller extension shaft.