Gas well liquid drainage tool with shaft dynamic parameter acquisition and interaction functions

Abstract

The invention discloses a gas well liquid drainage tool with a shaft dynamic parameter acquisition interaction function. The gas well liquid drainage tool comprises an electric catcher, a dynamic monitoring plunger, a data receiver and a ground controller. The data receiver is mounted at a horizontal pipe screwed plug on the blowout prevention pipe and is connected with the ground controller; the electric catcher is arranged at the original manual catcher and is connected with the ground controller; and the plunger is dynamically monitored to be put into the shaft, real-time data are continuously collected in the shaft, and liquid is periodically discharged. When a gas well is opened, the electric catcher extends out of the catching head and keeps a catching state, when the dynamic monitoring plunger reaches the inside of the blowout prevention pipe, fixed-position catching is achieved, data collected by the dynamic monitoring plunger in a shaft is transmitted to the data receiver, and working signals and data communication transmission of the electric catcher are both regulated and controlled by the ground controller in an upper-position mode. The dynamic monitoring plunger continuously collects data in a gas well oil pipe and wirelessly transmits the data after being captured at a wellhead, and integration of plunger liquid drainage and shaft dynamic monitoring functions is achieved.

Description

Technical Field

[0001] The invention relates to the field of special equipment for gas production in natural gas wells, and in particular to a gas well drainage tool with a wellbore dynamic parameter collection and interaction function. Background Art

[0002] Many natural gas wells have serious liquid accumulation in the wellbore and near-wellbore areas, which will affect the production of gas wells, especially for tight gas reservoirs. Severe liquid accumulation in the wellbore will cause a decrease in gas well production or even shutdown. Effective drainage process measures must be taken to ensure long-term stable production of gas wells. Among them, plunger gas lift is a drainage and stable production process commonly used in gas fields. Plunger gas lift uses the downhole plunger as an isolator of the gas-liquid interface and uses the gas well's own energy to lift the liquid on the top of the plunger in the tubing to the ground, thereby achieving gas well drainage. By lifting the liquid with the plunger, a stable interface is formed between the gas and the liquid, which can effectively prevent the loss of liquid and thus improve the lifting efficiency. The plunger gas lift process fully utilizes the gas well's own energy and can cover the development of the entire life cycle of the gas well.

[0003] At present, the conventional plunger gas lift process uses the wellhead opening and closing to control the plunger's discharge. It is necessary to install wellhead auxiliary facilities such as valves to control the opening and closing of the well at the wellhead, and manual daily management is still required. In addition, the production and operation parameters are relatively simple, and there is a lack of reference to the real-time parameters downhole. Therefore, the plunger implementation effect depends on manual analysis, and the technical implementation is not convenient enough.

[0004] At present, the parameters collected by plunger wells are only a few necessary points such as wellhead oil pressure, casing pressure, plunger arrival information, flow rate, etc., which can be routinely adjusted when the number of wells is small, but when the number of wells is large, the current management model is difficult to meet the workload of parameter adjustment. Plunger well management is in the key stage of intelligent transformation, and daily refined management is difficult to meet the parameter adjustment and system optimization work of all plunger wells.

[0005] The parameter adjustment of plunger wells is mainly based on the changing characteristics of the plunger well drainage curve, the changes in the gathering and transportation pressure of the well group, combined with manual experience and judgment, and according to the current production dynamics of the plunger well, the optimization parameter adjustment method mainly using timed switching wells and constant pressure switching wells is currently adopted to put the plunger well in a good state of drainage and gas production. However, this method has two shortcomings: first, it is too dependent on manual experience, requiring manual continuous attention to the production dynamics of the plunger well, which takes up a long time of manual work; second, the data points required for the adjustment of plunger wells are not enough to directly reflect the downhole production conditions, and there is a lack of real-time data such as downhole pressure, temperature, and plunger running speed, so the movement law of the plunger is not fully understood. Summary of the invention

[0006] The purpose of the present invention is to provide a gas well drainage tool with interactive function of wellbore dynamic parameter collection for the plunger well intelligent parameter adjustment application which relies on a single data source and is based on real-time downhole data.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A gas well drainage tool with a wellbore dynamic parameter acquisition interactive function, comprising an electric catcher, a dynamic monitoring plunger, a data receiver and a ground controller;

[0009] The electric catcher is connected to the side of the plunger lubricator through threads, and is used to capture and release the dynamic monitoring plunger in the lubricator; when receiving the well opening command from the ground controller, the electric catcher captures the dynamic monitoring plunger, and when receiving the well closing command from the ground controller, the electric catcher releases the dynamic monitoring plunger;

[0010] The dynamic monitoring plunger is installed in the plunger blowout preventer and is used to collect production data at the wellhead and downhole, including pressure, temperature and acceleration of the dynamic monitoring plunger during movement. At the same time, it can achieve periodic lifting and drainage with the well opening and closing. When the dynamic monitoring plunger is captured by the electric catcher, it starts to send the collected production data to the data receiver.

[0011] The data receiver and the electric catcher are connected by threads, and are used to receive the collected data uploaded by the dynamic monitoring plunger through the ground controller;

[0012] The ground controller is fixed to the plunger blowout preventer riser by a buckle, and is used to receive the well opening and closing instructions set in the well site RTU, and output instructions to the electric catcher. After receiving the instructions, the electric catcher performs the corresponding action.

[0013] A further improvement of the present invention is that the electric catcher comprises an elastic catch head, a conversion head, a guide seat, a lead screw motion assembly, an outer cylinder, a motor drive assembly and a power line connector;

[0014] The conversion head, guide seat and screw motion assembly are installed in the outer tube, the front end of the conversion head is used to receive and fix the elastic capture head, and the rear end receives the guide seat; the front end of the guide seat is connected to the elastic capture head, and the rear end is fitted with the screw motion assembly, which is used to transmit the force of the screw movement to the elastic capture head, so that the elastic capture head extends into the plunger blowout preventer to capture the dynamic monitoring plunger; the front end of the screw motion assembly contacts the guide seat, which is used to push or pull back the guide seat and transmit force to the elastic capture head, and the rear end is connected to the motor drive assembly to receive the motor drive force; the rear end of the motor drive assembly is connected to the power cord connector to receive power, and the rear end of the power cord connector is connected to the ground controller through the power cord.

[0015] A further improvement of the present invention is that the electric catcher further comprises a sealing O-ring for sealing the joint between the conversion head and the outer cylinder.

[0016] A further improvement of the present invention is that the dynamic monitoring plunger comprises a fishing head, an upper buffer spring, an upper sealing section, a pressure-bearing frame, a pressure sensor, a control panel, a middle joint, a battery, a lower sealing section, a lower buffer spring, a lower impact block and a shock-absorbing spring;

[0017] One end of the fishing head extends into one end of the sealing section, and a gap is left between the upper sealing sections. The upper buffer spring is sleeved on the end of the fishing head extending into the upper sealing section, and the upper sealing section acts as a liquid lifting seal; the two ends of the pressure-bearing frame are respectively connected to the upper sealing section and the lower sealing section;

[0018] An inner chamber is provided inside the connection between the pressure-bearing frame and the lower sealing section, and the inner chamber is divided into an upper part and a lower part. A shock-absorbing spring, a pressure sensor and a control board are respectively installed in the upper inner chamber, and a battery is installed in the lower inner chamber. The shock-absorbing spring is used to prevent the pressure sensor and the control board from being damaged by impact after an air displacement occurs in the upper inner chamber. The pressure sensor is used to collect downhole pressure and temperature values, and the control board is used to control the collection frequency of the pressure sensor and store the collected data; a middle joint connects the upper inner chamber and the lower inner chamber, and a pressure conducting hole is provided on the outside of the middle joint so that the medium outside the dynamic monitoring plunger can contact the pressure sensor probe, and a battery interface is provided in the middle of the middle joint for the battery to power the pressure sensor and the control board; a lower buffer spring is installed at the tail end of the dynamic monitoring plunger and is connected to the lower impact block.

[0019] A further improvement of the present invention is that a slot is provided on the circumference of the upper end sealing section, and the slot is fixed in the plunger blowout preventer by an electric catcher.

[0020] A further improvement of the present invention is that another shock absorbing spring is installed at the rear end of the battery to prevent the battery from being damaged by impact after being displaced in the lower inner chamber.

[0021] A further improvement of the present invention is that the data receiver includes a receiver housing, a transmission antenna, a sealing plug and a data transmission end. The receiver housing is used to load the transmission antenna and the sealing plug. The front end of the receiver housing is a thread plug, which is integrally installed at the thread plug of the blowout preventer cross pipe. A square groove is provided at the tail end of the sealing plug for placing the transmission antenna. The front end is in contact with the medium in the blowout preventer to play a pressure-bearing role. The front end of the transmission antenna is used to receive the periodic data collected in the dynamic monitoring plunger, and the tail end is connected to the data transmission end. The data transmission end is used to transmit the received downhole data to the ground controller.

[0022] A further improvement of the present invention is that the receiver housing is made of explosion-proof metal.

[0023] A further improvement of the present invention is that a 433 MHz wireless communication module is used at the front end of the transmission antenna to receive periodic data collected in the dynamic monitoring plunger.

[0024] A further improvement of the present invention is that the ground controller is used for data access, storage and output. The access and storage functions are: the data receiver accesses the data collected from the well by the dynamic monitoring plunger and stores it, and further outputs the stored data to the well site RTU by wire, and remotely transmits it to the rear-end plunger gas lift remote control platform system through the well site RTU; the output function is: the ground controller receives the well switch command set in the well site RTU, outputs the command to the electric capturer, and the electric capturer performs the corresponding action after receiving the command.

[0025] The present invention has at least the following beneficial technical effects:

[0026] Compared with other plungers with data collection function, the present invention is creative in two aspects: 1. The electric capturer, data receiver and ground controller designed by the present invention enable the dynamic monitoring plunger to transmit the collected production data to the server by wireless remote transmission without opening the plunger blowout preventer 1, and there is no need to manually open the blowout preventer at the production site to take out the plunger with data collection function and then complete the wired data transmission; 2. The dynamic monitoring plunger in the present invention has triple anti-impact functions of upper and lower buffer springs, battery end retaining springs and battery compartment glue injection, which can make the dynamic monitoring plunger run smoothly and reliably in the working state.

[0027] In summary, the present invention has a reliable structure, is easy to use, is simple to install, does not require fire, relies on existing devices and structures at the wellhead for operation, and saves costs. The present invention is compatible with the existing plunger drainage and gas production function, and can wirelessly transmit real-time dynamic parameters underground without opening the plunger blowout preventer. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the electric catcher of the present invention.

[0029] Figure 2 It is a structural schematic diagram of the dynamic monitoring plunger of the present invention.

[0030] Figure 3 It is a structural schematic diagram of a data receiver of the present invention.

[0031] Figure 4 It is a structural schematic diagram of the ground controller of the present invention.

[0032] Figure 5 It is a structural schematic diagram of a gas well drainage tool with a wellbore dynamic parameter acquisition interactive function according to the present invention.

[0033] Figure 6It is a schematic diagram of the structure of a conventional plunger wellhead blowout preventer.

[0034] Description of reference numerals:

[0035] 1. Plunger blowout preventer; 2. Elastic catch head; 3. Sealing O-ring; 4. Conversion head; 5. Guide seat; 6. Screw motion assembly; 7. Outer cylinder; 8. Motor drive assembly; 9. Power cord connector; 10. Manual catcher; 11. Cross pipe plug; 12. Salvage head; 13. Upper buffer spring; 14. Upper sealing section; 15. Pressure-bearing frame; 16. Pressure sensor; 17. Control board; 18. Middle connector; 19. Battery; 20. Lower sealing section; 21. Lower buffer spring; 22. Lower impact block; 23. Shock-absorbing spring; 24. First O-ring; 25. Receiver housing; 26. Transmission antenna; 27. Sealing plug; 28. Second O-ring; 29. ​​Data transmission terminal; 30. Electric catcher; 31. Dynamic monitoring plunger; 32. Data receiver; 33. Ground controller. DETAILED DESCRIPTION

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "one side", "one end", "one side" and the like indicate positions or positional relationships based on the positions or positional relationships 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 limiting the present invention. In addition, in the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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.

[0038] At present, the conventional dynamic monitoring plunger 31 drainage and gas production technology usually directly puts the dynamic monitoring plunger 31 into the wellbore, uses a pneumatic valve or an electric valve to open and close the gas well, thereby driving the dynamic monitoring plunger 31 to move upward and downward, discharges the accumulated liquid, and collects the data in the wellbore to the ground.

[0039] This type of conventional dynamic monitoring plunger 31 tool requires manual operation at the wellhead of the gas well. First, the time for the tool to arrive at the wellhead is calculated, and the manual capturer 10 is switched to the capture state. When the plunger is captured, the plunger blowout preventer 1 is opened to take out the dynamic monitoring plunger 31, and data is exported from the dynamic monitoring plunger 31 data interface, and the downhole data collected by the plunger is stored in the mobile terminal.

[0040] The operation at the wellhead has high labor costs and requires manual setting in advance to control the opening and closing time of the well. The technical implementation is not flexible enough. The following is a detailed description of a gas well drainage tool with interactive function of wellbore dynamic parameter collection in conjunction with the accompanying drawings and embodiments.

[0041] like Figures 1 to 5 As shown, the present invention provides a gas well drainage tool with a wellbore dynamic parameter collection and interaction function, including an electric catcher 30, a dynamic monitoring plunger 31, a data receiver 32, a ground controller 33 and an integrated related transmission device. On the basis of not changing the original conventional plunger wellhead blowout preventer, the data receiver 32 is installed by threaded connection to replace the horizontal pipe plug 11, and the electric catcher 30 is installed by threaded connection to replace the manual catcher 10, and the ground controller 33 is fixed at the riser of the plunger blowout preventer 1 by a buckle. Furthermore, the electric catcher 30, the data receiver 32 and the well site RTU are each connected to the ground controller 33 by cables, so as to realize a closed loop of data interaction of the wellhead device.

[0042] like Figure 1 , Figure 2 and Figure 4As shown, the electric catcher 30 is used to receive the capture signal and perform the capture / release action. The electric catcher 30 is installed on the side of the plunger blowout preventer 1 through a threaded connection, that is, at the original manual catcher. The elastic capture head 2 inside the electric catcher 30 is provided with a rebound chamber, and a spring is installed at the bottom of the rebound chamber, and the other end of the spring is connected to the elastic capture head 2. After receiving the well-closing signal, the elastic capture head 2 shrinks into the rebound chamber, releasing the dynamic monitoring plunger 31, so that the dynamic monitoring plunger 31 falls naturally; after receiving the well-opening signal, the elastic capture head 2 extends into the plunger blowout preventer 1, and the elastic capture head 2 is squeezed and compressed into the rebound chamber, and finally stuck in the gap of the sealing section 14 at the upper end of the dynamic monitoring plunger 31, so that the dynamic monitoring plunger 31 is in a data-interactive working state. The sealing O-ring 3 is used to seal the joint between the conversion head 4 and the outer tube 7 of the electric catcher 30 to prevent gas and liquid from entering the chamber of the electric catcher 30; the front end of the conversion head 4 is used to receive and fix the elastic capture head 2, and the rear end receives the guide seat 5, which plays a role of sealing and fixing; the front end of the guide seat 5 is connected to the elastic capture head 2, and the rear end is fitted with the screw motion assembly 6, which is used to transmit the force of the screw movement to the elastic capture head 2, so that the elastic capture head 2 extends into the plunger blowout preventer 1 to capture the dynamic monitoring plunger 31; the front end of the screw motion assembly 6 contacts the guide seat 5, which is used to push or pull back the guide seat 5, and transmit force to the elastic capture head 2, and the tail end is connected to the motor drive assembly 8 to receive the motor driving force; the front end of the motor drive assembly 8 is connected to the screw motion assembly 6, which is used to drive the screw motion assembly 6 to move forward or backward, and the tail end is connected to the power cord connector 9 to receive power; the front end of the power cord connector 9 is connected to the motor drive assembly 8, and the tail end is connected to the ground controller 33 through the power cord.

[0043] like Figure 1 As shown, the transmission mode of the electric catcher 30 at a fixed position at the wellhead adopts a capture joint adjustment mode, which reduces the influence of gas, liquid and impurities in the wellbore on data transmission.

[0044] Further, if Figure 1 As shown, the elastic capture head 2 of the electric capture device 30 extends into the plunger blowout preventer 1 by a maximum of 30 mm, and the elastic capture head 2 can be fully retracted after receiving the well shut-in signal.

[0045] like Figures 2 to 4As shown, the dynamic monitoring plunger 31 is used to collect, store and transmit downhole data, and at the same time achieve the same lifting and drainage effect as a conventional plunger. Specifically, the dynamic monitoring plunger 31 has two functions. One is to collect the pressure and temperature parameters in the gas wellbore through the pressure sensor 15 after being put into the wellbore, and store the data through the control board 17; the second is to use the upper sealing section 14 and the lower sealing section 20 to achieve lifting and drainage after the well is opened, achieving the same drainage and gas production effect as a conventional plunger. The pressure sensor 16 can integrate pressure, temperature, and acceleration in the wellbore, support variable frequency acquisition and storage, use low-speed acquisition when the plunger is at the bottom of the well or the wellhead, and use high-speed acquisition when the plunger is up and down. After being captured and fixed on the plunger blowout preventer 1 by the electric capturer 30, it is wirelessly transmitted to the ground controller 33 through the data receiver 32. The ground controller 33 parses and packages the collected data and transmits it to the data server through Ethernet through the existing switches and 4G routers in the well site for subsequent application calls.

[0046] like Figure 2 As shown, the dynamic monitoring plunger 31 adopts a bidirectional self-buffering structure design, shock-absorbing springs 23 are added at both ends of the electrical compartment, the inner cavity is potted with high-temperature glue, and triple shock-absorbing protection is provided.

[0047] like Figure 2 As shown, the dynamic monitoring plunger 31 supports variable frequency acquisition and storage. When the plunger is at the bottom of the well or at the wellhead, low-speed acquisition is adopted, and when the plunger moves up and down, high-speed acquisition is adopted. Wireless communication is supported, and the collected data is sent to the ground controller 33 in a wireless form after reaching the wellhead.

[0048] Specifically, Figure 1 and Figure 2As shown, the dynamic monitoring plunger 31 is mainly composed of a fishing head 12, an upper buffer spring 13, a sealing section 14, a pressure-bearing frame 15, a pressure sensor 16, a control board 17, a middle joint 18, a battery 19, a sealing section 20, a lower buffer spring 21, a lower impact block 22, a shock-absorbing spring 23, and a first O-ring 24. When the tool goes up to the wellhead of the gas well, the fishing head 1 will collide with the wellhead, and after triggering the upper buffer spring 13, the tool as a whole will achieve deceleration and shock absorption to prevent damage to the electronic components inside the tool. The upper sealing section 14 acts as a liquid seal to prevent the liquid column above the dynamic monitoring plunger 31 from slipping. At the same time, the groove of the upper sealing section 14 is fixed in the plunger blowout preventer 1 by the electric catcher 30 to stably transmit the data stored in the tool; the pressure-bearing skeleton 15 connects the upper sealing section 14 and the lower sealing section 20 to protect the dynamic monitoring plunger 31 from being disintegrated by external force during the upward and downward processes; the first O-ring 24 is used to fix the data interaction window of the sealed pressure sensor 16 and the pressure-bearing skeleton 15 and the middle joint 18 to prevent underground natural gas and liquid from invading the dynamic monitoring plunger 31; the dynamic monitoring plunger 31 is designed with an inner cavity compartment, and the inner cavity The cabin is designed with an upper part and a lower part. A shock-absorbing spring 23, a pressure sensor 16 and a control board 17 are installed in the upper inner cabin chamber respectively. The shock-absorbing spring 23 is used to prevent the pressure sensor 16 and the control board 17 from causing impact damage after the air displacement occurs in the upper inner cabin chamber. The pressure sensor 16 is used to collect downhole pressure and temperature values. The control board 17 is used to control the collection frequency of the pressure sensor 16 and store the collected data; the middle joint 18 connects the upper inner cabin chamber and the lower inner cabin chamber. A pressure guide hole is designed on the outside of the middle joint 18. The medium outside the dynamic monitoring plunger 31 contacts the probe of the pressure sensor 16. A battery 19 interface is designed in the middle of the interior to allow the battery 19 to power the pressure sensor 15 and the control board 17; the outside of the lower inner cabin chamber is a sealing section 20, which acts as a liquid seal to prevent the liquid column above the dynamic monitoring plunger 31 from slipping. The battery 19 is installed in the lower inner chamber of the dynamic monitoring plunger 31. The upper end of the battery 19 is connected to the pressure sensor 16 and the control board 17 through the middle joint 18 for power supply. A shock-absorbing spring 23 is installed at the tail end of the battery 19 to prevent the battery 19 from causing impact damage after idle displacement in the lower inner chamber; the lower buffer spring 21 is installed at the tail end of the dynamic monitoring plunger 31 and is connected to the lower impact block 22. When the dynamic monitoring plunger 31 reaches the seat and collides, the lower impact block 22 and the lower buffer spring 21 jointly play a role in buffering and shock reduction.

[0049] like Figure 1 and Figure 3 As shown, the electric catcher 30 and the data receiver 32 are connected in a threaded manner.

[0050] like Figure 3 and Figure 4As shown, the data receiver 32 is mainly composed of a receiver housing 25, a transmission antenna 26, a sealing plug 27, a second O-ring 28 and a data transmission terminal 29. When the dynamic monitoring plunger 31 moves up to the gas well blowout preventer and is fixed by the electric catcher 30, the data receiver 32 receives the data collected by the dynamic monitoring plunger 31 by wireless transmission. The receiver housing 25 is made of explosion-proof metal to load the transmission antenna 26, the sealing plug 27 and the second O-ring 28. The front end is a thread plug, which is integrally installed at the thread plug 11 of the blowout preventer cross pipe. The tail end of the sealing plug 27 is designed with a square groove for placing the transmission antenna 26. The front end is in contact with the medium in the blowout preventer to play a role in bearing pressure. An O-ring 28 is designed at the connection between the front end and the receiver housing to play a sealing role. The front end of the transmission antenna 26 adopts a 433MHz wireless communication module to receive the periodic data collected in the dynamic monitoring plunger 31. The tail end is connected to the data transmission terminal 29, and the data transmission terminal 29 is used to transmit the received downhole data to the ground controller 33.

[0051] Further, if Figure 3 As shown, the data receiver 32 transmission antenna is composed of an NPT2 plug, an antenna, and a pressure-bearing plug, and is used by the ground controller 33 to receive the collected data uploaded by the dynamic monitoring plunger 31.

[0052] like Figure 4 As shown, the ground controller 33 integrates wireless communication, motor drive, oil pressure acquisition, RS485 and Ethernet communication, real-time clock and file system functions.

[0053] Specifically, Figure 1 and Figure 3 As shown, the ground controller 33 is installed on the blowout preventer riser by means of a snap-on method. The controller shell is made of explosion-proof material. Its main function is to access, store and output data. The access and storage functions are mainly: the data receiver 32 accesses the data collected from the well by the dynamic monitoring plunger 31, and stores it, and further outputs the stored data to the well site RTU by wire, and transmits it to the rear-end plunger gas lift remote control platform system through the well site RTU; the output function is mainly: the ground controller 33 receives the well switch command set in the well site RTU, and outputs the command to the electric capturer 30, and the electric capturer 30 performs the corresponding action after receiving the command.

[0054] like Figure 6 The figure shows a schematic diagram of a conventional plunger wellhead blowout preventer. There are three parts related to the specification of the present invention. They are a plunger blowout preventer 1, a manual catcher 10, and a cross pipe plug 11. The riser of the plunger blowout preventer 1 is used to fix the ground controller 33; the electric catcher 30 is used to replace the manual catcher; and the dynamic monitoring plunger 31 is used to replace the cross pipe plug 11.

[0055] like Figures 1 to 5As shown, the uplink and downlink processes of the tool of the present invention are as follows:

[0056] When the dynamic monitoring plunger 31 is lowered into the well, the elastic capture head 2 of the electric capturer 30 is in a retracted state. When the dynamic monitoring plunger 31 detects that the rate of change of the surrounding pressure and temperature begins to increase, it switches to a high-speed data acquisition frequency band. The tool can perform free fall motion under the action of its own weight until it slides to the position of the preset retainer. Due to inertia, after reaching the position, the lower impact block 22 collides with the retainer. Under the action of the lower buffer spring 21, the tool stops above the retainer after shock absorption. At this time, there is a liquid column to be lifted above the tool. When the dynamic monitoring plunger 31 detects that the rate of change of the surrounding pressure and temperature begins to decrease, it starts to switch to a low-speed data acquisition frequency band.

[0057] After the well is opened, after the electric capturer 30 receives the signal from the ground controller 33, the elastic capture head 2 is pushed by the screw motion assembly 6 and extends into the plunger blowout preventer 1 and is in a capturing state. At the same time, under the action of the pressure difference, the dynamic monitoring plunger 31 begins to move toward the wellhead. When the dynamic monitoring plunger 31 detects that the rate of change of the surrounding pressure and temperature begins to increase, it starts to switch to a high-speed data acquisition frequency band; when the dynamic monitoring plunger 31 reaches the plunger blowout preventer 1, under the action of inertia, the groove of the upper sealing section of the dynamic monitoring plunger 31 is extended into the elastic capture head 2 in the plunger blowout preventer The head 2 is stuck. At this time, the plunger is in a captured state. When the dynamic monitoring plunger 31 detects that the rate of change of the surrounding pressure and temperature begins to decrease, it starts to switch to a low-speed data acquisition frequency band, and replaces the data receiver 32 at the cross pipe plug 11 in a wireless interactive manner to transmit the full-process data collected by the dynamic monitoring plunger 31 underground to the ground controller 33. The ground controller 33 then transmits the received full-process data to the well site RTU, and the RTU then transmits the full-process data after interaction to the plunger gas lift host server in a 4G / VPN communication manner for processing and analysis.

[0058] In the above embodiment, the battery 19 in the dynamic monitoring plunger 31 can meet the continuous power supply for 180 days. The shock-absorbing spring 23 at the tail end of the battery 19 plays a protective buffering role when the dynamic monitoring plunger 31 falls and hits the limiter, preventing the battery from forming an inertial collision in the idle range, thereby ensuring the safe use of the battery 19.

[0059] In the above embodiment, since there is basically no liquid in the transverse pipe section of the plunger blowout preventer 1, the data receiver 32 does not need to bear too much pressure formed by the liquid invading the transverse pipe section, thereby ensuring stable interaction of the whole process data between the dynamic monitoring plunger 31 and the data receiver 32 in a single medium environment, and the position of the dynamic monitoring plunger 31 is fixed, and the transmission condition is good.

[0060] In the above embodiments, in order to facilitate the installation of tools and devices, the manual catcher 10 and the cross pipe plug 11 on the original plunger blowout preventer 1 are replaced by threaded connection, without the need for hot work modification or changing the existing plunger wellhead process.

[0061] In the above embodiment, the electric catcher 30, the dynamic monitoring plunger 31, the data receiver 32 and the ground controller 33 are all the main bodies of the present invention.

[0062] In summary, the present invention has a simple structure and is easy to use. It does not require manual removal of the plunger and completion of data transmission operations at the wellhead. The dynamic detection plunger can quickly switch the frequency of data collection through changes in the surrounding pressure and temperature, reducing invalid redundant data and occupying storage space. At the same time, it can statically complete the whole process of data interaction at a fixed position, and the process is stable. The invention takes into account both drainage and gas production. The present invention does not require wellhead fire modification, does not require changes to the existing plunger wellhead process flow, saves costs, and achieves the purpose of taking into account both dynamic monitoring operations and drainage and gas production operations.

[0063] The above examples are merely illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. All designs that are the same or similar to the present invention fall within the protection scope of the present invention.

Claims

1. A gas well drainage tool with interactive function of collecting wellbore dynamic parameters, characterized in that: It includes an electric catcher (30), a dynamic monitoring plunger (31), a data receiver (32) and a ground controller (33); The electric catcher (30) is connected to the side of the plunger lubricator (1) through a threaded connection, and is used to capture and release the dynamic monitoring plunger (31) in the lubricator (1); when receiving a well opening instruction from a ground controller (33), the electric catcher (30) captures the dynamic monitoring plunger (31); when receiving a well closing instruction from the ground controller (33), the electric catcher (30) releases the dynamic monitoring plunger (31); The dynamic monitoring plunger (31) is mounted in the plunger blowout preventer (1) and is used to collect production data at the wellhead and downhole, including pressure, temperature and acceleration of the dynamic monitoring plunger (31) during movement, and to achieve periodic lifting and drainage as the well is switched on and off; when the dynamic monitoring plunger (31) is captured by the electric capturer (30), the collected production data begins to be sent to the data receiver (32); The data receiver (32) and the electric catcher (30) are connected by threads, and are used to receive the collected data uploaded by the dynamic monitoring plunger (31) through the ground controller (33); The ground controller (33) is fixed to the riser of the plunger blowout preventer (1) by means of a buckle, and is used to receive a well opening and closing instruction set in the well site RTU, and output the instruction to the electric catcher (30). The electric catcher (30) executes a corresponding action after receiving the instruction.

2. A gas well drainage tool with wellbore dynamic parameter acquisition interactive function according to claim 1, characterized in that: The electric catcher (30) comprises an elastic catch head (2), a conversion head (4), a guide seat (5), a lead screw motion assembly (6), an outer cylinder (7), a motor drive assembly (8) and a power line connector (9); The conversion head (4), the guide seat (5) and the screw motion assembly (6) are sleeved in the outer tube (7); the front end of the conversion head (4) is used to receive and fix the elastic capture head (2), and the rear end receives the guide seat (5); the front end of the guide seat (5) is connected to the elastic capture head (2), and the rear end is fitted with the screw motion assembly (6), and is used to transmit the force of the screw movement to the elastic capture head (2), so that the elastic capture head (2) extends into the plunger blowout preventer (1) to capture the dynamic monitoring plunger (31); the front end of the screw motion assembly (6) contacts the guide seat (5) to push or pull back the guide seat (5) to transmit force to the elastic capture head (2), and the rear end is connected to the motor drive assembly (8) to receive the motor drive force; the rear end of the motor drive assembly (8) is connected to the power line connector (9) to receive the power of the power source, and the rear end of the power line connector (9) is connected to the ground controller (33) through the power line.

3. A gas well drainage tool with wellbore dynamic parameter acquisition interactive function according to claim 2, characterized in that: The electric catcher (30) further comprises a sealing O-ring (3) for sealing the joint between the conversion head (4) and the outer cylinder (7).

4. A gas well drainage tool with wellbore dynamic parameter acquisition interactive function according to claim 2, characterized in that: The dynamic monitoring plunger (31) comprises a fishing head (12), an upper buffer spring (13), an upper sealing section (14), a pressure-bearing frame (15), a pressure sensor (16), a control panel (17), a middle joint (18), a battery (19), a lower sealing section (20), a lower buffer spring (21), a lower impact block (22) and a shock-absorbing spring (23); One end of the fishing head (12) extends into one end of the sealing section (14), and a gap is left between the upper sealing section (14). The upper buffer spring (13) is sleeved on the end of the fishing head (12) extending into the upper sealing section (14). The upper sealing section (14) serves to lift the liquid and seal. The two ends of the pressure-bearing frame (15) are respectively connected to the upper sealing section (14) and the lower sealing section (20). An inner chamber is provided in the connection between the pressure-bearing frame (15) and the lower sealing section (20), and the inner chamber is divided into an upper part and a lower part. A shock-absorbing spring (23), a pressure sensor (16) and a control panel (17) are respectively installed in the upper inner chamber, and a battery (19) is installed in the lower inner chamber. The shock-absorbing spring (23) is used to prevent the pressure sensor (16) and the control panel (17) from being damaged by collision after the pressure sensor (16) and the control panel (17) are displaced in the upper inner chamber. The pressure sensor (16) is used to collect downhole pressure and temperature values, and the control panel (17) is used to control the pressure. The sensor (16) collects data at a frequency and stores collected data; the middle joint (18) connects the upper inner chamber and the lower inner chamber, a pressure-conducting hole is provided on the outer side of the middle joint (18) so that the medium outside the dynamic monitoring plunger (31) can contact the probe of the pressure sensor (16), and a battery (19) interface is provided in the middle of the middle joint (18) for allowing the battery (19) to supply power to the pressure sensor (15) and the control board (17); a lower buffer spring (21) is installed at the tail end of the dynamic monitoring plunger (31) and is connected to the lower impact block (22).

5. A gas well drainage tool with wellbore dynamic parameter acquisition interactive function according to claim 4, characterized in that: A slot is provided on the circumference of the upper end sealing section (14), and the slot is fixed in the plunger blowout preventer (1) by an electric catcher (30).

6. A gas well drainage tool with wellbore dynamic parameter acquisition interactive function according to claim 4, characterized in that: Another shock absorbing spring (23) is installed at the rear end of the battery (19) to prevent the battery (19) from being damaged by impact after being displaced in the lower inner chamber.

7. A gas well drainage tool with wellbore dynamic parameter acquisition interactive function according to claim 4, characterized in that: The data receiver (32) comprises a receiver housing (25), a transmission antenna (26), a sealing plug (27) and a data transmission terminal (29). The receiver housing (25) is used to load the transmission antenna (26) and the sealing plug (27). The front end of the receiver housing (25) is a threaded plug, which is integrally mounted at the threaded plug (11) of the lubricating pipe cross pipe. The rear end of the sealing plug (27) is provided with a square groove for placing the transmission antenna (26). The front end is in contact with the medium in the lubricating pipe to play a role in bearing pressure. The front end of the transmission antenna (26) is used to receive the periodic data collected in the dynamic monitoring plunger (31). The rear end is connected to the data transmission terminal (29). The data transmission terminal (29) is used to transmit the received downhole data to the ground controller (33).

8. A gas well drainage tool with wellbore dynamic parameter acquisition and interactive function according to claim 7, characterized in that: The receiver housing (25) is made of explosion-proof metal.

9. A gas well drainage tool with wellbore dynamic parameter acquisition and interactive function according to claim 7, characterized in that: The front end of the transmission antenna (26) adopts a 433 MHz wireless communication module for receiving periodic data collected in the dynamic monitoring plunger (31).

10. A gas well drainage tool with wellbore dynamic parameter acquisition and interactive function according to claim 7, characterized in that: The ground controller (33) is used for data access, storage and output. The access and storage functions are: the data receiver (32) accesses the data collected from the well by the dynamic monitoring plunger (31) and stores it, and further outputs the stored data to the well site RTU via wire, and transmits it to the rear plunger gas lift remote control platform system through the well site RTU; the output function is: the ground controller (33) receives the well opening and closing instructions set in the well site RTU, outputs the instructions to the electric capturer (30), and the electric capturer (30) performs the corresponding action after receiving the instructions.

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