Automatic monitoring and processing device for breakage of polish rod of oil pumping unit
By setting up a tension sensor and automatic clamping device in the oil pump, monitoring and handling of the break of the bar, the problems of dropping and sealing failure after the broken bar are solved, and environmental protection and working efficiency are improved.
Patent Information
- Application Number
- CN202421487810.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-06-27
AI Technical Summary
The oil pump's bar will fall into the well after it breaks, resulting in seal failure, environmental pollution and the need for deep well salvage in the later stage, which is time-consuming and labor-intensive.
An automatic monitoring and treatment device for breaking a light rod by oil pump is designed. By setting a tension sensor between the suspending rope and the donkey head of the oil pump, the tension value is monitored. When abnormal, the controller controls the automatic clamping device to clamp the broken light rod in the light rod sealer.
It effectively prevents the bar from falling into the well after breaking, avoids seal failure and environmental pollution, and reduces the workload of later salvage, improving work efficiency and safety.
Smart Images
Figure CN222558521U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a pumping unit fault processing device, in particular to an automatic monitoring and processing device for the broken bare rod of the pumping unit. Background Art
[0002] The polished rod of the oil pump is a component that is connected between the sucker rod and the rope hanger and is responsible for force transmission. Due to the large alternating load on the polished rod and other reasons, the polished rod often breaks. According to research, the fracture position of the polished rod generally occurs at the root where it is connected to the rope hanger. Moreover, after the polished rod breaks, it will be transferred into the oil well under the action of gravity, which will cause the failure of the polished rod seal and the polished rod seal, causing environmental pollution. On the other hand, in the later processing, the polished rod needs to be salvaged, which is time-consuming and laborious. Utility Model Content
[0003] The purpose of the utility model is to provide an automatic monitoring and processing device for the breakage of an oil pumping unit's polished rod in view of the defects existing in the above-mentioned technology. When the tension sensor detects that the tension value of the suspension rope is abnormal, the controller automatically determines that the polished rod is broken, and controls the automatic clamping device of the polished rod sealer to clamp the polished rod in the polished rod sealer. On the one hand, it prevents the polished rod from falling into the well, and no salvage operation is required in the later stage. On the other hand, it can also prevent crude oil from spraying out and polluting the environment.
[0004] The purpose of the utility model is achieved by: comprising:
[0005] A tension sensor, wherein the upper end of the tension sensor is connected to the donkey head of the oil pump, and the lower end is connected to the rope hanger, and the lower part of the rope hanger is connected to the polished rod;
[0006] A polished rod sealer, wherein the polished rod sealer is installed at the wellhead, the polished rod is inserted into the polished rod sealer, and the polished rod sealer is provided with an automatic clamping device;
[0007] The controller is connected with the tension sensor and the automatic clamping device. The tension sensor transmits the captured tension value to the controller, and the controller controls the operation of the automatic clamping device according to the tension value.
[0008] In the above structure, the bare rod sealer comprises a cross seat, the lower part of the cross seat is connected to a joint, the cross seat is laterally and coaxially provided with a first mounting part and a second mounting part, and the first mounting part is provided with an automatic clamping device.
[0009] In the above structure, the first mounting portion includes a first inner hole and a second inner hole arranged coaxially, the diameter of the second inner hole is larger than the diameter of the first inner hole, and the first inner hole is axially provided with a first slide groove;
[0010] The automatic clamping device comprises a sliding base, one end of which is provided with a clamping portion, and the other end of which is connected to a push rod of a pushing device, and the pushing device is fixedly connected to the first mounting portion;
[0011] Furthermore, a first sliding block is provided on the sliding base corresponding to the first sliding groove, the first sliding block is slidably connected to the first sliding groove, and a sealing ring is radially provided at one end of the sliding base connected to the pushing device.
[0012] In the above structure, the pushing device is an electric push rod or a hydraulic cylinder.
[0013] In the above structure, the mating surface between the clamping portion and the polished rod is an arc surface.
[0014] In the above structure, a manual clamping device is provided in the second mounting portion, and the manual clamping device includes a fixed base, the fixed base is screwed to the end of the second mounting portion, and a threaded hole is provided in the center of the fixed base, and is screwed to the manual push rod through the threaded hole;
[0015] Furthermore, the manual clamping device is also provided with a sliding part, the manual push rod is rotatably connected to the sliding part, the sliding part is provided with a second sliding block, the inner hole of the second mounting part is provided with a second sliding groove, and the second sliding block is slidably matched with the second sliding groove.
[0016] In the above structure, a pressure cover is provided on the top of the light rod sealer, and the pressure cover includes a main part and a secondary part. The main part and the secondary part are both hollow structures and are internally connected. The main part cooperates with the light rod, and the secondary part is vertically arranged with the main part. A ball is provided in the secondary part, and the ball abuts against the spring. The other end of the spring abuts against the end cover, and the end cover is fixedly connected to the end of the secondary part.
[0017] In the above structure, the controller is also connected to an alarm, and when an abnormal tension value is detected, the alarm automatically sounds an alarm.
[0018] The beneficial effects of the utility model are as follows: a tension sensor is provided between the rope hanger and the donkey head of the oil pump, and the tension value is automatically monitored each time the donkey head is lifted through the tension sensor. When the tension value is abnormal, the controller controls the automatic clamping device to operate, and the broken light rod is clamped in the light rod sealer through the automatic clamping device, effectively preventing the light rod from falling into the well after breaking; a secondary part is provided on the top of the light rod sealer, and when the broken light rod is pulled out, the ball blocks the inner hole of the light rod sealer under the action of the spring to prevent oil spraying. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the installation method of the utility model of the automatic monitoring and processing device for the broken rod of the oil pumping unit;
[0020] Figure 2 It is a structural schematic diagram of a polished rod sealer of the utility model. DETAILED DESCRIPTION
[0021] The present application provides an automatic monitoring and processing device for the broken rod of an oil pumping unit. A tension sensor is provided between the rope suspension device and the donkey head of the oil pumping unit. The tension sensor automatically monitors the tension value each time the donkey head is lifted. When the tension value is abnormal, the controller controls the automatic clamping device to operate, and the broken rod is clamped in the rod sealer by the automatic clamping device, effectively preventing the rod from falling into the well after breaking. The problem in the prior art that the rod will fall into the well after breaking, causing the rod sealer to fail to seal, resulting in oil spraying, and the need for deep well salvage in the later stage is solved.
[0022] The following is a further description of this implementation case in conjunction with the accompanying drawings:
[0023] Depend on Figure 1 — Figure 2 It can be seen that the present application includes a tension sensor 1, the upper end of which is connected to the donkey head 2 of the oil pump, and the lower end is connected to the rope hanger 3, the lower part of the rope hanger 3 is connected to the light rod 4, the light rod 4 is inserted into the light rod sealer 5, the light rod sealer 5 is installed at the wellhead, and is provided with an automatic clamping device; a controller is provided, the controller is connected to the tension sensor 1 and the automatic clamping device, the tension sensor 1 transmits the captured tension value to the controller, and the controller controls the operation of the automatic clamping device through the tension value.
[0024] In this embodiment, a tension threshold is set in the controller, and the tension value captured by the tension sensor 1 is compared with the set threshold. However, if the tension is less than the threshold, it indicates that the polished rod 4 is broken and the donkey head 2 is running idle. At this time, the controller controls the automatic clamping device in the polished rod sealer 5 to operate, clamp the polished rod 4 in the polished rod sealer, and wait for manual processing to prevent the polished rod 4 from falling into the oil well after breaking.
[0025] Based on the above embodiment, preferably, the light rod sealer 5 includes a cross seat 510, the lower part of the cross seat 510 is connected to a joint 520, the cross seat 510 is laterally coaxially provided with a first mounting portion 530 and a second mounting portion 540, and the first mounting portion 530 is provided with an automatic clamping device.
[0026] On the basis of the above embodiment, preferably, the first mounting portion 530 includes a first inner hole 531 and a second inner hole 532 coaxially arranged, the diameter of the second inner hole 532 is larger than the diameter of the first inner hole 531, and the first inner hole 531 is axially provided with a first slide groove 533. The automatic clamping device includes a sliding base 550, one end of which is provided with a clamping portion 551, and the other end is connected to a push rod 610 of a pushing device 6, and the pushing device 6 is fixedly connected to the first mounting portion 530. A first slider 552 is provided on the sliding base 550 corresponding to the first slide groove 533, and the first slider 552 is slidably connected to the first slide groove 533, and a sealing ring 7 is radially provided at one end of the sliding base 550 connected to the pushing device 6.
[0027] This embodiment discloses a specific structure of a clamping device, when the polished rod 4 is broken, the pushing device 6 is operated, and its push rod 610 drives the sliding base 550 to move quickly toward the polished rod 4, so that the clamping part 551 clamps the polished rod in the vertical inner hole of the cross seat 510. The first sliding groove 533 cooperates with the first sliding block 552 to prevent the sliding base 550 from rotating.
[0028] Based on the above implementation, preferably, the pushing device 6 is one of an electric push rod or a hydraulic cylinder. When the hydraulic cylinder is provided, a pump station can be provided according to conventional technology.
[0029] On the basis of the above embodiment, preferably, the mating surface between the clamping portion 551 and the polished rod is an arc-shaped surface, wherein the curvature of the arc-shaped surface is preferably the same as the radius of the polished rod 4 .
[0030] On the basis of the above embodiment, preferably, a manual clamping device is provided in the second mounting portion 540, and the manual clamping device includes a fixed base 541, the fixed base 541 is screwed to the end of the second mounting portion 540, and a threaded hole 542 is provided at the center of the fixed base 541, and the manual push rod 543 is screwed through the threaded hole 542. Further, the manual clamping device is also provided with a sliding portion 544, the manual push rod 543 is rotatably connected to the sliding portion 544, the sliding portion 544 is provided with a second slider 545, the inner hole of the second mounting portion 540 is provided with a second slide groove 546, and the second slider 545 is slidably matched with the second slide groove 546. In this embodiment, a manual clamping portion is provided in the second mounting portion 540, which can cope with other working conditions such as replacing the light rod 4.
[0031] On the basis of the above embodiment, preferably, a pressure cover is provided on the top of the light rod sealer 5, and the pressure cover includes a main part 561 and a secondary part 562, and the main part 561 and the secondary part 562 are both hollow structures and are internally connected, the main part 561 cooperates with the light rod 4, and the secondary part 562 is vertically arranged with the main part 561, and a ball 563 is provided in the secondary part 562, and the ball 563 abuts against the spring 564, and the other end of the spring 564 abuts against the end cover 565, and the end cover 565 is fixedly connected to the end of the secondary part 562.
[0032] In this embodiment, a blowout prevention device is provided at the top of the light rod sealer 5. Specifically, when the light rod 4 is pulled out, the ball 563 will enter the inner hole of the main part 561 under the action of the spring force, and then, under the action of the oil pressure, the inner hole of the main part 561 will be sealed to prevent oil spraying.
[0033] Based on the above implementation, preferably, the controller is also connected to an alarm, and when an abnormal tension value is detected, the alarm automatically sounds an alarm.
[0034] According to the research of Liaohe Oilfield, a load clip is provided on the rope hanger. Since the internal teeth of the load clip are threaded, the bare rod must bear the shear prestress of the clip when hanging the sucker rod. During the reciprocating motion of the pumping unit bare rod, the contact part between the bare rod and the teeth changes the cross-sectional size due to the stress, causing a sharp increase in stress in a small range near the cross-sectional change, resulting in stress concentration. Therefore, the fracture of the bare rod generally occurs at the root where the bare rod and the load clip fit.
[0035] After the rod is broken, it will fall into the well due to gravity, and crude oil will spray out from the inner cavity of the rod sealer, which will cause environmental pollution on the one hand and energy waste on the other hand. The automatic monitoring and processing device in the present application will automatically operate the automatic clamping device in the rod sealer 5 when the tension value is abnormal. The broken rod can be prevented from falling into the well, and deep well salvage is required in the later stage, which is time-consuming and laborious; on the other hand, the broken rod is fixed in the rod sealer 5, and the rod is always sealed with the rod sealer 5 to prevent crude oil from spraying out and polluting the environment. In addition, after the tension value is abnormal, the alarm automatically alarms, which is convenient for maintenance personnel to find and repair in time. There are two ways of alarm in the present application. The first is to provide a flashing light alarm on the pumping unit housing, and the other is to send error information to the monitoring machine remotely through the controller. The above two methods can be set at the same time, or only one of them can be set.
[0036] In addition, the device is provided with a secondary part 562 in the gland, and a ball 563 is provided in the secondary part 562. When the broken polished rod is processed and the polished rod is pulled out, the ball 563 enters the main part 561 of the gland under the action of the spring 564, and seals the inner hole of the main part to prevent the crude oil from spraying out. Therefore, the present application not only solves the monitoring and processing of the broken polished rod, but also solves the sealing problem when the polished rod is replaced later.
[0037] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
Claims
1. An automatic monitoring and processing device for oil pumping unit polished rod fracture, characterized in that: include: A tension sensor, wherein the upper end of the tension sensor is connected to the donkey head of the oil pump, and the lower end is connected to the rope hanger, and the lower part of the rope hanger is connected to the polished rod; A polished rod sealer, wherein the polished rod sealer is installed at the wellhead, the polished rod is inserted into the polished rod sealer, and the polished rod sealer is provided with an automatic clamping device; The controller is connected with the tension sensor and the automatic clamping device. The tension sensor transmits the captured tension value to the controller, and the controller controls the operation of the automatic clamping device according to the tension value.
2. The automatic monitoring and processing device for the broken polished rod of an oil pumping unit according to claim 1 is characterized in that: The polished rod sealer comprises a cross seat, the lower part of the cross seat is connected to a joint, and the cross seat is laterally and coaxially provided with a first mounting part and a second mounting part; An automatic clamping device is arranged in the first mounting portion.
3. The automatic monitoring and processing device for the broken polished rod of an oil pumping unit according to claim 2 is characterized in that: The first mounting portion comprises a first inner hole and a second inner hole which are coaxially arranged, the diameter of the second inner hole is larger than the diameter of the first inner hole, and the first inner hole is axially provided with a first sliding groove; The automatic clamping device comprises a sliding base, one end of which is provided with a clamping portion, and the other end of which is connected to a push rod of a pushing device, and the pushing device is fixedly connected to the first mounting portion; A first sliding block is provided on the sliding base corresponding to the first sliding groove, the first sliding block is slidably connected to the first sliding groove, and a sealing ring is radially provided at one end of the sliding base connected to the pushing device.
4. The automatic monitoring and processing device for polished rod fracture of a pumping unit according to claim 3 is characterized in that: The pushing device is an electric push rod or a hydraulic cylinder.
5. The automatic monitoring and processing device for polished rod fracture of an oil pumping unit according to claim 3 is characterized in that: The matching surface between the clamping part and the polished rod is an arc surface.
6. The automatic monitoring and processing device for the broken polished rod of an oil pumping unit according to claim 2 is characterized in that: A manual clamping device is provided in the second mounting portion, and the manual clamping device includes a fixed base, the fixed base is screwed to the end of the second mounting portion, and a threaded hole is provided in the center of the fixed base, and is screwed to the manual push rod through the threaded hole; The manual clamping device is also provided with a sliding part, the manual push rod is rotatably connected to the sliding part, the sliding part is provided with a second sliding block, the inner hole of the second mounting part is provided with a second sliding groove, and the second sliding block is slidably matched with the second sliding groove.
7. The automatic monitoring and processing device for polished rod fracture of a pumping unit according to claim 1 is characterized in that: A pressure cover is provided on the top of the light rod sealer, and the pressure cover includes a main part and a secondary part. The main part and the secondary part are both hollow structures and are internally connected. The main part cooperates with the light rod, and the secondary part is vertically arranged with the main part. A ball is provided in the secondary part, and the ball abuts against a spring, and the other end of the spring abuts against the end cover, and the end cover is fixedly connected to the end of the secondary part.
8. The automatic monitoring and processing device for polished rod fracture of a pumping unit according to claim 1 is characterized in that: The controller is also connected to an alarm, which automatically sounds an alarm when an abnormal tension value is detected.