Active safety protection device for tripping tubular column of workover rig

Abstract

An active safety protection device for tripping a tubular column of a workover rig belongs to the safety production technology of oil field workover rigs, overcomes the defects in the prior art, and comprises a pressure sensor, an A / D sampling chip, a main chip, a keyboard, an LED display screen and a safety module, the pressure sensor is connected with the A / D sampling chip, the A / D sampling chip is connected with the main chip, and the main chip is connected with the keyboard. The keyboard, the LED display screen and the safety module are connected with the main chip; the safety module comprises an emergency braking device, an engine throttle disconnecting device, a roller clutch disconnecting device and an audible and visual alarm.

Description

Technical Field

[0001] The invention relates to a safe production technology for an oilfield workover rig, in particular to an active safety protection device for tripping and running a pipe string of the workover rig. Background Art

[0002] A workover rig is one of the most important pieces of equipment in underground operations. When operating a workover rig to lift a tubing string, the overhanging weight of the tubing string can rise abnormally due to well conditions. Failure to detect this in time can lead to tubing jamming, severe equipment damage, or even casualties.

[0003] When running the tubing string, especially when running large-diameter tools, the annulus between the casing and the tool is small. If the casing is deformed or scaled and waxed, the tubing string may not be detected in time and may become blocked or stuck, resulting in serious engineering accidents. To date, no similar patented technology has been found.

[0004] Therefore, it is of great significance to develop an active safety protection device for lifting and lowering the tubing string of a workover rig, which can perform active safety protection when there is an abnormality in the lifting and lowering of the tubing string, prevent the accident from becoming complicated, and achieve intrinsic safety. Summary of the Invention

[0005] The purpose of the present invention is to provide an active safety protection device for lifting and lowering the tubing of a well repair rig using active safety protection technology when the tubing hanging weight is abnormal. The device overcomes the shortcomings of the prior art. The purpose of the present invention is achieved as follows: the device includes a pressure sensor, an A / D sampling chip, a main chip, a keyboard, an LED display, and a safety module. The pressure sensor is connected to the A / D sampling chip, the A / D sampling chip is connected to the main chip, and the keyboard, LED display, and safety module are connected to the main chip.

[0006] The safety module includes: emergency brake device, engine throttle disconnect device, roller clutch disconnect device, and sound and light alarm.

[0007] The application method of the active protection device for safe tripping of pipe string includes the following steps: Step 1: Set the pipe string warning value Fq1 to 20Kn and the pipe string critical protection value Fq2 to 30Kn.

[0008] Set the numerical duration Tq1=2s, and set the numerical duration Tq2=1s.

[0009] The calculation formula of the fluctuation value Fq is: Fq (Kn) = current hanging weight of the string - actual hanging weight of the string.

[0010] Step 2: Set the lower string warning value Fx1 to 20Kn, set the upper string critical protection value Fx2 to 30Kn, set the value duration Tx1 to 3s, and set the value duration Tx2 to 2s.

[0011] Step 3: Set the duration T1 to 5s.

[0012] The calculation formula of the fluctuation value Fx is: Fx (Kn) = actual hanging weight of the string - current hanging weight of the string.

[0013] If Fq≤Fq1 and the duration is less than Tq1, the safety module has no output state. The hanging weight of the string is within the normal floating range.

[0014] If Fq≤Fq1 and the holding time is ≥Tq1 and the duration is <T1, the safety module output state is an audible and visual alarm, reminding personnel to pay attention to the abnormal hanging weight of the pipe string and slow down the construction.

[0015] If Fq≤Fq1 and the duration is ≥T1, the safety module outputs an emergency brake state, disconnecting the engine throttle and the drum clutch, and sounding an audible and visual alarm. Active safety protection is implemented when the string hanging weight is abnormal to prevent safety accidents.

[0016] If Fq1<Fq≤Fq2 and the duration ≤Tq2, the hanging weight of the string is within the normal floating range.

[0017] If Fq1<Fq<Fq2 and the duration ≤Tq1, the safety module outputs an audible and visual alarm to remind personnel to pay attention to the abnormal hanging weight of the pipe string and to slow down construction.

[0018] If Fq ≥ Fq2 and the duration ≥ Tq2, the safety module outputs an emergency brake state, disconnects the engine throttle and the drum clutch, and sounds an audible and visual alarm. Active safety protection is implemented to prevent accidents caused by abnormal hanging weight of the pipe string.

[0019] If Fx≤Fx1 and the duration is less than Tx1, the safety module has no output state. The hanging weight of the string is within the normal floating range.

[0020] If Fx1≤Fx1 and Tx1≤duration<T1, the safety module outputs an audible and visual alarm to remind personnel to pay attention to the abnormal hanging weight of the pipe string and to slow down construction.

[0021] If Fx≤Fx1 and the duration is ≥T1, the safety module outputs an emergency brake state, disconnecting the engine throttle and the drum clutch, and sounding an audible and visual alarm. Active safety protection is implemented when the string hanging weight is abnormal to prevent safety accidents.

[0022] If Fx1<Fx≤Fx2 and the duration ≤Tx2, the hanging weight of the string is within the normal floating range.

[0023] If Fx1<Fx<Fx2 and the duration ≤Tx1, the safety module outputs an audible and visual alarm to remind personnel to pay attention to the abnormal hanging weight of the pipe string and to slow down construction.

[0024] If Fx ≥ Fx2 and the duration ≥ Tx2, the safety module outputs an emergency brake state, disconnecting the engine throttle and the drum clutch, and sounding an audible and visual alarm. Active safety protection is implemented to prevent accidents caused by abnormal hanging weight of the pipe string.

[0025] The present invention can monitor the hanging weight of the pipe column in real time during the construction process, and take active safety protection and alarm when the hanging weight is abnormal, so as to achieve intrinsic safety, improve production efficiency and prevent accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of the present invention.

[0027] Figure 2 It is a data processing diagram of the present invention. DETAILED DESCRIPTION

[0028] like Figure 1 As shown, the active safety protection device for string tripping of the present invention comprises a pressure sensor 1, an A / D sampling chip 2, a main chip 3, a keyboard 4, an LED display 5, and a safety module 6. The pressure sensor 1 is connected to the A / D sampling chip 2, which is connected to the main chip 3. The keyboard 4, LED display 5, and safety module 6 are also connected to the main chip 3.

[0029] The present invention installs a pressure sensor at the oil outlet of the hydraulic tensioner of the workover rig, digitally processes the changes in the hanging weight of the pipe string through the main chip, and intelligently analyzes the changes in the hanging weight of the pipe string, so as to timely discover abnormal problems of the pipe string and ensure construction safety.

[0030] The sampling frequency of the pressure sensor in the present invention is once every 0.1s, which can be modified according to actual conditions and is not limited to a sampling frequency of 0.1s.

[0031] When the tubing is being lifted in and out of the well, if the tubing hanging weight collected by the main chip suddenly changes from 0 to >0, and the value fluctuation range is ≤5Kn, the middle value of the five average segments in the 1s time period is taken, and the average value is calculated to be ≥ the previous average value, and saved in the actual tubing hanging weight array of the chip.

[0032] Step 1: Set the pipe string warning value Fq1 to 20Kn, set the pipe string critical protection value Fq2 to 30Kn, set the value duration Tq1 to 2s, and set the value duration Tq2 to 1s.

[0033] The calculation formula of the fluctuation value Fq is: Fq (Kn) = current hanging weight of the string - actual hanging weight of the string.

[0034] Step 2: Set the lower string warning value Fx1 to 20Kn, set the upper string critical protection value Fx2 to 30Kn, set the value duration Tx1 to 3s, and set the value duration Tx2 to 2s.

[0035] Step 3: Set the duration T1 to 5s. The calculation formula for the fluctuation value Fx is: Fx (Kn) = actual hanging weight of the string - current hanging weight of the string.

[0036] If Fq≤Fq1 and the duration is less than Tq1, the safety module has no output state. The hanging weight of the string is within the normal floating range.

[0037] If Fq≤Fq1 and the holding time is ≥Tq1 and the duration is <T1, the safety module output state is an audible and visual alarm, reminding personnel to pay attention to the abnormal hanging weight of the pipe string and slow down the construction.

[0038] If Fq≤Fq1 and the duration is ≥T1, the safety module outputs an emergency brake state, disconnecting the engine throttle and the drum clutch, and sounding an audible and visual alarm. Active safety protection is implemented when the string hanging weight is abnormal to prevent safety accidents.

[0039] If Fq1<Fq≤Fq2 and the duration ≤Tq2, the hanging weight of the string is within the normal floating range.

[0040] If Fq1<Fq<Fq2 and the duration ≤Tq1, the safety module outputs an audible and visual alarm to remind personnel to pay attention to the abnormal hanging weight of the pipe string and to slow down construction.

[0041] If Fq ≥ Fq2 and the duration ≥ Tq2, the safety module outputs an emergency brake state, disconnects the engine throttle and the drum clutch, and sounds an audible and visual alarm. Active safety protection is implemented to prevent accidents caused by abnormal hanging weight of the pipe string.

[0042] If Fx≤Fx1 and the duration is less than Tx1, the safety module has no output state. The hanging weight of the string is within the normal floating range.

[0043] If Fx1≤Fx1 and Tx1≤duration<T1, the safety module outputs an audible and visual alarm to remind personnel to pay attention to the abnormal hanging weight of the pipe string and to slow down construction.

[0044] If Fx≤Fx1 and the duration is ≥T1, the safety module outputs an emergency brake state, disconnecting the engine throttle and the drum clutch, and sounding an audible and visual alarm. Active safety protection is implemented when the string hanging weight is abnormal to prevent safety accidents.

[0045] If Fx1<Fx≤Fx2 and the duration ≤Tx2, the hanging weight of the string is within the normal floating range.

[0046] If Fx1<Fx<Fx2 and the duration ≤Tx1, the safety module outputs an audible and visual alarm to remind personnel to pay attention to the abnormal hanging weight of the pipe string and to slow down construction.

[0047] If Fx ≥ Fx2 and the duration ≥ Tx2, the safety module outputs an emergency brake state, disconnecting the engine throttle and the drum clutch, and sounding an audible and visual alarm. Active safety protection is implemented to prevent accidents caused by abnormal hanging weight of the pipe string.

[0048] In the present invention, Fq1, Fq2, Fx1, Fx2, Tq1, Tx1, and T1 can be modified according to actual conditions and are not limited to 2 groups, and multiple groups can be set.

[0049] In addition to the above embodiments, the present invention may also have other implementation methods. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present invention.

Claims

1. An active safety protection device for lifting and lowering a pipe string of a workover rig, comprising a pressure sensor (1), an A / D sampling chip (2), a main chip (3), a keyboard (4), an LED display (5), and a safety module (6), wherein: The pressure sensor (1) is connected to the A / D sampling chip (2), the A / D sampling chip (2) is connected to the main chip (3), and the keyboard (4), LED display (5), and security module (6) are connected to the main chip (3).

2. The method for applying the active safety protection device for tripping a pipe string on a workover rig according to claim 1 is characterized by: The sampling frequency of the pressure sensor of this device is once every 0.1s, which can be modified according to actual conditions and is not limited to a sampling frequency of 0.1s. When the tubing is being lifted in and out of the well, if the tubing hanging weight collected by the main chip suddenly changes from 0 to a value greater than 0, and the value fluctuates within a range of ≤5Kn, the middle value of the five average segments in the 1s time period is taken, and the average value is calculated to be ≥ the previous average value, and the value is saved in the chip tubing actual hanging weight array.

3. The method for applying the active safety protection device for tripping a tubular string on a workover rig according to claim 2 is characterized by: The method includes the following steps: Step 1: setting the pipe string warning value Fq1, setting the pipe string critical protection value Fq2, setting the value duration Tq1, and setting the value duration Tq2; the fluctuation value Fq is calculated as follows: Fq (Kn) = the current hanging weight of the pipe string - the actual hanging weight of the pipe string; Step 2: Set the lower string warning value Fx1, set the upper string critical protection value Fx2, set the value duration Tx1, set the value duration Tx2; Step 3: Set the numerical duration T1; The calculation formula of the fluctuation value Fx is: Fx (Kn) = actual hanging weight of the string - current hanging weight of the string; If Fq≤Fq1 and the duration is less than Tq1, the safety module has no output state. The hanging weight of the string is within the normal floating range; If Fq≤Fq1 and the holding time is ≥Tq1 and the duration is <T1, the safety module outputs an audible and visual alarm to remind personnel to pay attention to the abnormal hanging weight of the pipe string and to slow down the construction; If Fq≤Fq1 and the duration is ≥T1, the safety module outputs the state of emergency braking, disconnects the engine throttle and the drum clutch, and sounds an audible and visual alarm; active safety protection is implemented for abnormal hanging weight of the pipe string to prevent safety accidents; If Fq1<Fq≤Fq2 and the duration ≤Tq2, the hanging weight of the string is within the normal floating range; If Fq1<Fq<Fq2 and the duration ≤Tq1, the safety module outputs an audible and visual alarm to remind personnel to pay attention to the abnormal hanging weight of the pipe string and to slow down the construction; If Fq ≥ Fq2 and the duration ≥ Tq2, the safety module outputs an emergency brake state, disconnects the engine throttle and the drum clutch, and sounds an audible and visual alarm; active safety protection is implemented for abnormal hanging weight of the pipe string to prevent safety accidents; If Fx≤Fx1 and the duration is less than Tx1, the safety module has no output state and the string hanging weight is within the normal floating range; If Fx1≤Fx1 and Tx1≤duration<T1, the safety module outputs an audible and visual alarm to remind personnel to pay attention to abnormal hanging weight of the pipe string and to slow down construction; If Fx≤Fx1 and the duration is ≥T1, the safety module outputs the state of emergency braking, disconnects the engine throttle and the drum clutch, and sounds an audible and visual alarm; active safety protection is implemented for abnormal hanging weight of the pipe string to prevent safety accidents; If Fx1<Fx≤Fx2 and the duration ≤Tx2, the string hanging weight is within the normal floating range; If Fx1<Fx<Fx2 and the duration ≤Tx1, the safety module outputs an audible and visual alarm to remind personnel to pay attention to the abnormal hanging weight of the pipe string and to slow down the construction; If Fx≥Fx2 and the duration ≥Tx2, the safety module outputs the state of emergency braking, disconnects the engine throttle and the drum clutch at the same time, and sounds an audible and visual alarm; active safety protection is performed in the event of abnormal hanging weight of the pipe string to prevent safety accidents.

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