84 results about "Snubbing" patented technology

A method to unload a fluid mixture from an underground production tubing, in order to reduce the hydrostatic pressure within the fluid mixture. A method to kill an oil or gas well by equalizing pressure between the production tubing, the casing annulus, and a surface tank battery, by de-pressurizing the fluid within the production tubing and the casing annulus, and by pumping a kill fluid. One goal of the methods may be to avoid discharging unwanted liquid phase or gas phase to the atmosphere, therefore reducing unnecessary emissions, and valuing the recovered products.

A heater cable is disposed through a wellhead assembly into a production tubing string and is lowered such that it is at least partially immersed within a volume of a well kill fluid. Prior to the immersion, a density of the well kill fluid relative to the produced fluids at the downhole end is such that the volume of well kill fluid prevents the flow of the produced fluids from the subterranean zone into the production tubing string. An electric current is flowed though the heater cable, and the heater cable converts the electric current to heat energy. The heat energy is transferred by conduction to the kill fluid thereby reducing the density of the well kill fluid relative to the produced fluids such that the well kill fluid rises in an uphole direction through the production tubing string.

A control system for controlling pressure of fluid within a wellbore includes a rotating control device (RCD), a distribution manifold, a choke and kill (CK) manifold, and a managed pressure drilling (MPD) manifold fluidly connected with each other, a sensor operable to facilitate fluid measurements indicative of a property of the fluid, and a controller communicatively connected with the distribution manifold and the sensor. The controller is operable to receive the fluid measurements, cause the distribution manifold to direct the fluid discharged out of the wellbore via the RCD to flow through the MPD manifold to thereby permit the MPD manifold to control the pressure of the fluid within the wellbore, and cause the distribution manifold to direct the fluid discharged out of the wellbore via the RCD to flow through the CK manifold to thereby permit the CK manifold to control the pressure of the fluid within the wellbore.

The invention provides a drilling machine fault diagnosis, alarm and processing method and device.The method comprises the steps that operation data and logging data of a target drilling machine are obtained, and the operation data comprise at least one of motor torque, motor rotating speed, motor power and motor temperature; the logging data comprises at least one of bit pressure, rotating speed, pumping pressure, well depth and torque; performing timestamp alignment, data normalization, feature cleaning and missing compensation on the operation data and the logging data to construct a unified time sequence multi-modal feature set; and inputting the unified time sequence multi-modal feature set into a pre-trained large language model, performing anomaly diagnosis on the target drilling machine, and outputting an improvement suggestion. According to the scheme, the technical problem that existing drilling machine fault diagnosis is low in efficiency and accuracy is solved, and the technical effect of improving the accuracy, generalization and response speed of drilling machine fault diagnosis is achieved.

1. The name of the design product: three-cylinder piston pump. 2. The use of the design product: the pump is used for intermittent oil well operation, such as acidification, well cementing, fracturing, well killing, gravel packing and the like. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The utility model discloses a dynamic and static liquid level monitoring device suitable for a return-free leakage well, which belongs to the technical field of oil and gas well drilling leakage stoppage and comprises a dynamic and static liquid level monitor assembly and a three-way flow choking device, the three-way flow choking device comprises a main monitoring pipe and a side return blowing pipe, and the side return blowing pipe is fixed on the main monitoring pipe to form a three-way structure. The dynamic and static liquid level monitor assembly is fixed to the top end of the main monitoring pipe, the bottom end of the main monitoring pipe is used for being connected with a kill manifold, the end of the side back-blowing pipe is connected with an external blowing mechanism, the main monitoring pipe is provided with a first valve and a second valve, the side back-blowing pipe is provided with a third valve, and by controlling opening and closing of the three valves, the dynamic and static liquid level can be monitored. The liquid level monitoring device can monitor the liquid level of the return-loss leakage well, cleans the three-way flow choking device through the external blowing mechanism, solves the technical problem that a liquid level monitoring instrument in the prior art is prone to being blocked, achieves convenient and efficient use of the dynamic and static liquid level monitoring device, and provides a convenient and efficient solution for well drilling leakage stoppage operation.

The application provides a control method and system of a throttling well killing manifold, the throttling well killing manifold is connected with a wellhead device, and comprises a rapid blowout channel and a common blowout channel which are arranged in parallel, and a throttle valve is installed on the common blowout channel; the control method comprises the following steps: real-time monitoring of wellhead casing pressure P a and standpipe pressure P1, and determining the pressure difference between the wellhead casing pressure and the standpipe pressure; when P a -P l <P z , the drilling operation is normal, and the throttling well killing manifold is not opened; when P z ≤P a -P1<aP z , the throttling well killing manifold is opened, and the opening degree of the throttle valve is dynamically adjusted according to a throttle valve opening degree processing model; when P a -P1≥aP z , or there is no drilling fluid to be recovered in the separator and the well is full of gas, the rapid blowout channel is opened, and blowout operation is implemented. In the process of implementing the blowout operation, the application adopts multi-channel control, and ensures the timeliness and safety of the blowout.

This application discloses an integrated gas invasion control method that combines inhibition and absorption, applied to wellbores experiencing gas invasion. The method includes the following steps: constructing a composite slurry column system in the wellbore, comprising, from bottom to top, a gas-intake slug and a gas-enhancing slug; the gas-intake slug converts free gas into a solid-phase adsorbed state or a liquid-phase dissolved state by adding gas-intake material to the drilling fluid, thereby reducing the gas volume in situ within the wellbore; the gas-enhancing slug triggers viscosity enhancement when residual gas enters by adding a gas-responsive material to the drilling fluid, increasing fluid resistance and mitigating gas slippage. This application achieves a synergistic gas control effect through a segmented composite slurry column system, first reducing gas volume through absorption and then increasing viscosity and reducing gas flow rate, enabling early proactive intervention in gas invasion, avoiding fluid instability and gas channeling risks, and improving well control success rate.

The present application belongs to the technical field of manifold, and particularly relates to an intelligent throttling well killing manifold, which comprises a base, a plurality of movable support assemblies are slidably connected to the base, the movable support assemblies are fixedly connected with a cross piece, the cross piece is fixedly connected with a plurality of valve body assemblies, adjacent two valve body assemblies are fixed through quick dismounting and mounting assemblies, the quick dismounting and mounting assemblies are fixed on the movable support assemblies, the cross piece and the quick dismounting and mounting assemblies are fixed on different movable support assemblies, the position of the cross piece and the plurality of valve body assemblies can be changed by changing the position of the movable support assemblies on the base, thereby the butt joint installation of the oil well pipeline at different positions can be adapted, the quick dismounting and mounting between adjacent two valve body assemblies can be realized through the quick dismounting and mounting assemblies, the quick maintenance and replacement of the valve body assemblies can be realized, the maintenance efficiency of the throttling well killing manifold is improved, the throttling well killing manifold can be quickly put into use, and thereby the downtime is reduced.

The present application relates to a kind of well gas invasion and loss parameter inversion methods based on unscented Kalman filter, belong to petroleum engineering technical field, comprising: step 1: establish overflow wellbore multiphase flow model;Step 2: establish inversion model;Step 3: solve inversion model;Calculate the inversion result of downhole gas invasion and loss parameter.The application method combines wellbore multiphase flow equation with state space model, uses the nonlinear estimation characteristics of UKF algorithm, carries out dynamic filtering and state updating to wellhead measurable data, realizes the real-time inversion of downhole gas volume fraction, gas invasion flow and loss amount.UKF method can accurately capture the nonlinear characteristics of system without linearization, thereby improving the inversion accuracy and calculation stability under complex conditions.Through example verification, this method has good applicability under single reservoir, multiple reservoir and overflow and leakage coexistence conditions, provides reliable boundary conditions and intelligent control basis for well control system.

This invention relates to a smart stratified injection-production string for carbon dioxide injection, comprising a first tubing and a second tubing connected by a backwash valve or a release tool. A hydraulic feedback pump is installed on the first tubing, and several packers are installed at intervals on the second tubing. A smart control switch tool is installed between two adjacent packers, each corresponding to an oil layer. An anchoring tool is also installed on the second tubing. This invention enables stratified injection, well shut-in, well release, and stratified production of carbon dioxide in any one or more layers without moving the injection-production string. This effectively improves the effective utilization rate of carbon dioxide, the degree of oil layer utilization, and the injection-production conversion efficiency, thereby increasing injection-production efficiency and oil recovery rate, reducing well workover work, well occupation time, and well cleaning and well layer contamination, and lowering operating costs.

A method to unload a fluid mixture from an underground production tubing, in order to reduce the hydrostatic pressure within the fluid mixture. A method to kill an oil or gas well by equalizing pressure between the production tubing, the casing annulus, and a surface tank battery, by de-pressurizing the fluid within the production tubing and the casing annulus, and by pumping a kill fluid. One goal of the methods may be to avoid discharging unwanted liquid phase or gas phase to the atmosphere, therefore reducing unnecessary emissions, and valuing the recovered products.

The invention discloses an emergency disposal method and a related device for cable broken wire clamping. The method comprises the following steps: closing and locking a flashboard of a cable blowout preventer; a sealing medium is injected into the locked flashboard, and a wellhead is sealed; releasing the pressure of the cable blowout preventer on the sealed wellhead, and detaching a blowout prevention pipe; and maintaining the cable in the detached blowout prevention pipe. Compared with a traditional well killing treatment method, the method has the advantages that the operation steps are simplified, the cost input is reduced, the treatment time efficiency is improved, leakage of drilling fluid or other harmful substances can be prevented, workers are protected against injuries, and meanwhile the environment is protected.

The invention discloses a pressure-controlled underground temporary closing valve and a using method thereof. The pressure-controlled underground temporary closing valve comprises a fixed sealing part and a constant pressure valve part, and the upper end of the constant pressure valve part is connected with the lower end of the fixed sealing part; the constant pressure valve part comprises a constant pressure valve body and a constant pressure valve core; a downward valve seat is arranged in the constant-pressure valve body, and the constant-pressure valve element is arranged in the valve seat and cannot move upwards. The operation principle is simple in field actual use, temporary plugging of a production layer is reliable, non-well-killing shaft operation and rapid production recovery can be achieved, the operation safety coefficient is increased, well killing, drilling and sweeping procedures and pollution of slurry plugging slurry to the production layer are reduced, the slurry and well repairing cost is reduced, and the operation time efficiency is improved.

The utility model discloses a throttling kill manifold sand prevention device, which belongs to the technical field of throttling kill manifolds and comprises an oil outlet pipe, a conical filter cartridge is fixedly sleeved on the outer side of the top end of the oil outlet pipe, and a first three-way connector is fixedly connected with the top end of the conical filter cartridge. Gate valves are fixedly installed at the two ends of the top of the first three-way connector correspondingly, and first oil guide pipes are fixedly installed at one ends of the two gate valves correspondingly. According to the utility model, when exploited oil liquid is discharged from the oil outlet pipe, large-particle impurities in the oil liquid are directly filtered by using the conical filter hopper and the filter holes in the inner cavity of the conical filter cartridge, so that the impurities in the oil liquid are prevented from influencing a first three-way joint and a gate valve which are subsequently connected, and the scraper is driven to rotate by using the first motor; and impurities filtered from the bottom surface of the conical filter hopper are cleaned by using the scraper, so that the filtering effect of the filter holes is ensured.

This invention discloses a method for controlling a blowout in a marine well by drilling through the riser. The method includes the following steps: establishing a working face using scaffolding; pre-positioning the crane vessel, workboat, and guard vessel before the operation; placing the casing drilling equipment, high-pressure pump, fire-fighting equipment, and protective gear on the workboat or wellhead area before drilling; selecting the drilling location and number of holes; pre-installing the riser backplate before drilling the outer riser; drilling the riser, technical casing, and production casing sequentially, confirming the safety of each annulus layer; upon discovering an overflow during drilling, quickly tightening the backplate; and implementing well control operations using heavy brine, barite slurry, or non-dispersible cement slurry. This invention addresses blowout situations in drilling or production wells on offshore platforms. It allows for close deployment of all aspects during emergency rescue, rapid sealing of the outer riser, and connection of the well control manifold to the internal wellbore. This enables successful well control and sealing operations in each annulus layer. The method is highly operable, has a short construction period, and requires minimal investment.

The present invention relates to the technical field of oil pipes, and discloses an oil pipe for oil and gas well construction, comprising an oil pipe body for drilling and producing underwater oil fields, the oil pipe body comprising a first oil pipe and a second oil pipe installed at both ends of the first oil pipe, wherein a group of the second oil pipes has pressure relief ports on both sides thereof; a conducting unit, the conducting unit comprising an inner sliding sleeve arranged between the two groups of pressure relief ports, and a plurality of pressure plates are arranged above the inner sliding sleeve, and a group of the second oil pipes corresponding to the inner sliding sleeves are provided with a first locking ball and a second locking ball; when a ball is thrown into the oil pipe body, the steel ball enters the inclined port and blocks the inner sliding sleeve, so that the steel ball pushes the inner sliding sleeve to release the blockage of the pressure relief port. The present invention quickly opens the pressure relief channel through the ball throwing and pressurizing operation, thereby avoiding the risk of uncontrolled well kick caused by blockage of the well killing channel, allowing the pipe string to quickly relieve pressure after the packer fails, thereby avoiding wear of the packer and the oil pipe body.

The invention discloses a system and method for monitoring the annulus liquid level in the drilling well leakage state, and the system comprises a wellhead temporary plugging device which is used for achieving the temporary plugging of an upper port of a shaft during the drilling well leakage so as to block the upward propagation path of sound waves; the annulus liquid level monitoring device is arranged on the well killing manifold and is used for measuring a detection signal representing the dynamic change characteristics of the annulus liquid level by adopting a sound wave measurement technology; and the data processing device is used for obtaining a dynamic environmental control liquid level measurement value according to the detection signal. Under the leakage state, the blowout preventer can be not closed, the annular liquid level can be continuously monitored, and the injection amount of drilling fluid can be accurately controlled.

The application provides a well completion string, a well completion method and an injection-production system, the well completion string comprising a production casing and a well completion assembly connected to one end of the production casing, the production casing comprising one or more limiting splices, the multiple limiting splices being distributed along the axial direction of the production casing, a limiting part being arranged on the inner wall of the limiting splices, the limiting part being convex relative to the inner wall of the main body of the production casing; the limiting part is used for cooperating with a blowout plug to carry out blowout control, and / or is used for cooperating with a sealing plug at the bottom of a central pipe string lowered into the production casing to carry out string limiting. According to the technical scheme of the application, the limiting splices are designed in the production casing of the well completion string, the limiting part of the limiting splices can cooperate with the blowout plug to carry out blowout control or cooperate with the central pipe string lowered into the production casing to realize the setting of the string, stable blowout control can be realized under the condition that the well bottom is under pressure, and the setting of the central pipe string without packers can be realized, which provides favorable conditions for corresponding injection-production operations.

A heater cable is disposed through a wellhead assembly into a production tubing string and is lowered such that it is at least partially immersed within a volume of a well kill fluid. Prior to the immersion, a density of the well kill fluid relative to the produced fluids at the downhole end is such that the volume of well kill fluid prevents the flow of the produced fluids from the subterranean zone into the production tubing string. An electric current is flowed though the heater cable, and the heater cable converts the electric current to heat energy. The heat energy is transferred by conduction to the kill fluid thereby reducing the density of the well kill fluid relative to the produced fluids such that the well kill fluid rises in an uphole direction through the production tubing string.

The invention relates to the field of petroleum drilling engineering, in particular to an experimental device for simulating the well killing effect of a rescue well under different communication points. According to the technical scheme, a visual transparent outer shaft, an annular inner shaft, an upper plug and a lower plug form a shaft unit, a simulated rescue well, an angle sensor, a universal connector, an angle adjusting mechanism and a steel hoop form a rescue well unit, and an upper liquid outlet pipeline, a liquid storage tank, a stirrer, a screw pump and a kill fluid injection pipeline form a kill fluid injection unit. The air compressor, the pressure reducing valve, the pressure stabilizing valve, the gas flow regulator, the one-way valve and the gas inlet pipeline form a gas injection unit. The device has the beneficial effects that the simulation rescue well is connected through the universal connector and the angle adjusting mechanism, the complex flowing process of gas invasion and pressure back in a shaft can be simulated when the rescue well at different angles is killed, and the gas-liquid flowing rules of the rescue well at different angles, well killing fluid with different viscosities and at different flow speeds can be clearly observed.

The invention discloses an under-pressure operation machine with a coiled tubing injection head mode, and relates to the technical field of petroleum machinery, the under-pressure operation machine comprises an injection head and a hydraulic catwalk, the hydraulic catwalk is located on one side of the injection head, an injection module and a guide cone are installed in the injection head, and the guide cone is located above the injection module; the hydraulic catwalk is provided with a conveying rail used for containing a pipe column, a first mechanical arm used for placing the pipe column on the conveying rail and a mast obliquely extending towards the upper end of the injection head, the mast is provided with a second mechanical arm capable of sliding in the axis direction of the mast, and the first mechanical arm and the second mechanical arm are each provided with a hydraulic elevator. The hydraulic elevator can grab the tubular column placed on the conveying rail. The device not only has the functions of a conventional under-pressure operation machine, but also has most of the advantages of the coiled tubing, so that the advantages of coiled tubing operation and under-pressure operation are perfectly combined.

The application provides a coal and natural gas cooperative mining method and a mining system, and the method comprises the following steps: arranging a natural gas collecting chamber in a stable rock layer below a coal seam, arranging a natural gas collecting device in the natural gas collecting chamber, and pumping natural gas in a gas layer below the rock layer; and conveying the pumped natural gas to the ground through a gas pipeline, wherein the gas pipeline is arranged in the natural gas collecting chamber, a coal mining roadway and a auxiliary shaft in sequence, and a wellhead of the auxiliary shaft is arranged above the ground. The natural gas collecting chamber is arranged in the stable rock layer below the coal seam, the natural gas collecting device is arranged in the natural gas collecting chamber, and the natural gas in the gas layer below the rock layer is pumped, so that the natural gas well does not need to pass through the coal seam, the problem of well killing of natural gas in the process of cooperative mining of coal and natural gas can be effectively avoided, and the influence of mining and the influence of overburden rock fracture on the natural gas well caused by the coal seam mining can be reduced.

The application relates to the technical field of petroleum well manifolds, in particular to an ultrahigh-pressure throttling well killing manifold; the ultrahigh-pressure throttling well killing manifold comprises a well main pipe, an automatic pressure regulator is communicated and arranged on the well main pipe, the automatic pressure regulator is fixed and communicated with a backflow pipeline, the backflow pipeline is communicated and arranged at the tail end of the well main pipe; the upper end of the well main pipe is fixed and communicated with an auxiliary material adding pipeline for adding auxiliary materials; the upper and lower ends of the well main pipe are respectively fixed and communicated with an upper circulating deslagging pipe and a lower circulating deslagging pipe for deslagging; the ultrahigh-pressure throttling well killing manifold has the advantages that the problem that the well mouth pipeline with unstable internal pressure cannot be used is solved by using real-time circulation hedging, and the problem that the unstable well mouth pressure pipeline cannot be adaptively adjusted is solved.

This invention discloses a single-unit pump braking device, relating to the field of geological exploration drilling rig technology. It includes a coupling, a clutch, a pump-connected universal joint, a main air circuit, and a control air circuit. The coupling includes a coupling output shaft and a charging / adjusting valve. The coupling output shaft is the power output part of the independent pump unit, and the charging / adjusting valve is the coupling speed regulating device. By modifying the clutch friction plates, clutch hub, and clutch air bladder, installing a pneumatic control valve, and modifying the entire air circuit, the pump shutdown time of the single-unit pump unit is significantly shortened to meet actual working conditions. Simultaneously, the desired braking condition can be selected according to actual working conditions, effectively achieving safe and rapid well control operations, effectively reducing well control risks, and ensuring well control safety.

An offshore drilling wellbore pressure control device comprises an automatic control module, a prying type choke manifold, a well killing pump and a supplementary well killing pump, a mud pit and a wellbore are connected through a first communication channel and a second communication channel respectively, the well killing pump and a first pressure sensor are arranged on the first communication channel, the first communication channel is communicated with a drill rod, and the second pressure sensor is arranged on the second communication channel. The drill rod is arranged in the shaft, the second communicating passage is provided with a skid-type throttle manifold and a supplementary kill pump, the skid-type throttle manifold is internally provided with a speed-adjustable throttle valve, and the second communicating passage between the speed-adjustable throttle valve and the wellhead is provided with a gas-liquid flowmeter and a second pressure sensor. The method has the advantages that automatic control over the whole well killing process is achieved, adverse effects caused by manual well killing of field personnel are completely eliminated, and the problems that pressure control is not accurate in the well killing process, and gas overflow well killing difficulty is large are solved. The automatic well killing device can be used on site and can automatically adjust the wellhead pressure, and the response speed and accuracy of well killing operation are improved.

The invention relates to the field of oil and gas drilling well control, and discloses a pressure control drilling overflow well killing simulation system and method, a medium and electronic equipment. The system comprises a data acquisition and control device used for acquiring pressure at a preset position of a shaft simulation device and sending an instruction used for adjusting the opening degree of a throttle valve; the shaft simulation device is used for simulating a shaft environment; the drilling fluid circulating device is used for controlling the drilling fluid to execute circulating operation between the shaft simulation device and the drilling fluid circulating device and controlling the backflow flow of the drilling fluid; the well killing device is used for inputting well killing fluid; the overflow device is used for inputting gas cut fluid; during overflow well killing, the one-way valve serves as a channel for well killing fluid to flow into the annular space of the sleeve so as to increase the density of overflow objects in the annular space and further slow down the rising speed of the gas cut fluid. The relation between overflow parameters and wellhead back pressure in the overflow well killing process can be analyzed according to pressure and flow, and theoretical support can be provided for overflow well killing; and the one-time well killing success rate can be improved.

The invention belongs to the technical field of oil well drilling and mining, and particularly relates to an oil well annulus liquid level opening measuring method and system.The method comprises the steps that a Y-shaped tee joint and a manual flat valve above the Y-shaped tee joint are installed at a kill manifold valve, and underground liquid level detection equipment is connected; annulus sound wave signals are collected in the well opening state; sequentially carrying out wavelet threshold noise reduction and self-adaptive notch filtering on the signal; an echo period T is determined through fusion of autocorrelation analysis and spectral analysis, sliding window template matching is carried out according to the period, and liquid level echo signals are extracted and enhanced; finally, the liquid level depth is calculated, dynamic verification is conducted, and then a result is output. Through collaborative innovation of a mechanical structure and a signal processing algorithm, real-time, automatic and high-precision measurement of the annulus liquid level without well shut-in is achieved, the defect that well shut-in operation is needed in a traditional method is overcome, and production continuity and operation safety are remarkably improved.

The utility model discloses a preset plugging device for a steam injection tubular column, and belongs to the technical field of oil production engineering. According to the technical scheme, the device comprises a preset working barrel arranged in the steam injection tubular column and a plugging sealing body which is anchored and sealed with the preset working barrel after entering the preset working barrel. The utility model has the beneficial effects that the plugging in the high-temperature pipe can be realized, well washing and killing are not needed before operation, fluid entering the well is reduced, an oil layer is protected, and the risk of high-temperature operation is reduced.

The application is a blowout prevention tool for well operation pipe column and its using method, the blowout prevention tool is provided with circulation passage opening mechanism, anchoring mechanism and sealing mechanism, the well killing joint in the circulation passage opening mechanism can be connected with the well killing pipeline joint, the circulation passage opening mechanism, the anchoring mechanism and the sealing mechanism are connected through the lower connecting joint, the anchor claw, the inner support cylinder and the sealing mechanism upper joint in sequence. The tool structure is simple, and it is a well safety control tool which can be quickly installed, effectively seal the well operation pipe column and prevent overflow upwelling. When the well overflow is found, the tool can be quickly installed in the well operation pipe column to realize the anchoring of the tool in the well operation pipe column. The application can effectively reduce the fire accidents and environmental pollution accidents caused by the sudden blowout of oil and gas wells, reduce the waste and loss of oil resources and reduce the safety production risk.