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68 results about "Well kill" patented technology
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A well kill is the operation of placing a column of heavy fluid into a well bore in order to prevent the flow of reservoir fluids without the need for pressure control equipment at the surface. It works on the principle that the hydrostatic head of the "kill fluid" or "kill mud" will be enough to suppress the pressure of the formation fluids. Well kills may be planned in the case of advanced interventions such as workovers, or be contingency operations. The situation calling for a well kill will dictate the method taken.
Device and method for rapidly regulating downhole pressure after kick in deepwater shallow open-circuit drilling
Disclosed are a device and method for rapidly regulating downhole pressure after a kick in deepwater shallow open-circuit drilling. The device includes a real-time monitoring device and a real-time regulation device. Aiming at deepwater shallow open-circuit drilling characteristics, the present disclosure proposes that a drilling fluid return condition at a seabed is monitored through a subsea remote operated vehicle (ROV); based on this data, whether gas influx occurs in a downhole or not and changes of the gas influx rate and the formation pressure after the gas influx are analyzed in real time, and then real-time guidance is provided for the design of key parameters such as well killing fluid displacement and density, and the well killing fluid displacement and density are regulated in real time, to achieve rapid regulation of the downhole pressure after gas influx of deepwater shallow open-circuit drilling.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA) +1
Solid-free well killing fluid and preparation method thereof
The invention relates to the technical field of petroleum and natural gas drilling engineering, in particular to a solid-free well killing fluid and a preparation method thereof, and the solid-free well killing fluid comprises the following raw materials in parts by weight: 80-100 parts of a base fluid, 25-35 parts of a composite additive, 8-12 parts of a soluble thickener, 6-10 parts of a liquid-phase anti-collapse agent and 3-5 parts of a lubricating aid. According to the high-density well killing fluid, a high-density system is constructed through the additive solution A of the composite additive, the specific gravity upper limit of a traditional salt weighting agent is broken through, the hydrotropy stabilizing effect of triethanolamine is combined, salting-out of high-concentration components is avoided, and the problem that specific gravity increase of traditional solid-free well killing fluid is limited is effectively solved; the system viscosity is increased, a liquid rubber plug can be formed, exchange dilution of the well killing fluid and residual sewage in a shaft is effectively blocked, performance degradation caused by dilution of the well killing fluid is avoided, and material waste caused by supplementing of the well killing fluid is also reduced.
Owner:DONGYING HUIYOU GASOLINEEUM NEW TECH DEV
Control method and system for a choke and kill manifold
ActiveCN117662042BOpening adjustmentreduce openingFlushingWell/borehole valve arrangementsWell killWell drilling
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.
Owner:CHINA NAT PETROLEUM CORP +1
Well kill overflow event prediction method, system and device based on hierarchical multi-joint learning
This invention belongs to the field of overflow events, specifically relating to a hierarchical multi-joint learning-based method, system, and equipment for predicting well control overflow events. It aims to address the problems of equipment damage, production interruption, safety accidents, and environmental pollution caused by overflow event risks. The invention includes: training multiple well control overflow event prediction base models based on the training set; obtaining prediction results based on the test set; calculating the accuracy of the base models and selecting retained models to obtain a final feature set; integrating the retained models based on the final feature set to construct a voting-based ensemble model; and inputting the data to be predicted into the ensemble model to obtain the well control overflow event prediction result. This invention improves prediction accuracy and robustness by constructing an ensemble model, optimizes resource utilization, enhances operational safety and decision-making efficiency, effectively prevents well control overflow events, and ensures the safety and economic benefits of oilfield operations.
Owner:CNPC BOHAI DRILLING ENG +1
Well killing decision real-time generation method, device and equipment, medium and product
The embodiment of the invention provides a real-time generation method and device for a well killing decision, equipment, a medium and a product. According to the method, real-time observation data of the flow state of a shaft is obtained. And obtaining prediction state parameters based on the shaft hydraulic model and the real-time observation data. And correcting and fusing the real-time observation data and the predicted state parameters to generate a shaft state estimation result. And determining a well killing control strategy based on the shaft state estimation result and a preset safety constraint condition. According to the method, the problems that in the prior art, shaft state sensing is insufficient, decision response is lagged, and the safety risk control capability is weak are solved, and the intelligent level and safety of well killing operation are remarkably improved.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
Intelligent choke and kill manifold
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.
Owner:YANCHENG YUYANG PETROLEUM MASCH CO LTD
Determination method and device for management and control strategy of sealed wellbore, storage medium, electronic device and computer program product
The invention discloses a determination method and device of a sealed wellbore management and control strategy, a storage medium, an electronic device and a computer program product, and relates to the field of sealed wellbore management and control, and the determination method of the sealed wellbore management and control strategy comprises the steps of monitoring operation data of a target wellbore, the operation data at least comprise the well killing fluid return condition of a diversion trench outlet of the target shaft and in-shaft pressure change data of the target shaft; according to the operation data, determining the risk level of abnormity of the target shaft; and according to the risk level, determining a sealed wellbore management and control strategy of the target wellbore. By the adoption of the technical scheme, the problem that the manual management and control efficiency of the sealed wellbore is low is solved.
Owner:HUANENG CLEAN ENERGY RES INST +1
Paraffin removal viscosity reducer for hydraulic jet paraffin removal as well as preparation method and use method of paraffin removal viscosity reducer
The invention relates to the technical field of oilfield chemistry, in particular to a paraffin removal viscosity reducer for hydraulic jet paraffin removal and a use method thereof, the paraffin removal viscosity reducer for hydraulic jet paraffin removal comprises the following raw materials in percentage by mass: 0.1-0.5% of octadecanol, 5-10% of eicosyl heavy mahogany petroleum sulfonate, 5-20% of ethanol, 1-5% of polyethylene oxide surfactant, 10-20% of betaine surfactant, 0.1-0.2% of hydroxyethyl cellulose and the balance of water. And the paraffin removal viscosity reducer is used for adding a required amount of the paraffin removal viscosity reducer into a working medium to obtain a paraffin removal working solution, the paraffin removal working solution is injected into the light casing oil well in a 10-13MPa hydraulic jet fluid form, and the paraffin deposits on the casing wall of the light casing oil well are cleaned by using the hydraulic jet fluid. The paraffin removal and viscosity reduction agent disclosed by the invention is simple in preparation method, can achieve a synergistic effect with a hydraulic jet fluid technology, and can maintain efficient paraffin removal and viscosity reduction performance in a high-salinity and high-specific-gravity slurry or solid-free well killing fluid environment.
Owner:KARAMAY XINKEAO CHEM CO LTD
Experimental method for simulating well killing effect of rescue well under different communication points
The invention relates to an experimental method for simulating the well killing effect of a rescue well under different communication points. Comprising the following steps that (1) a communication point adjusting device is installed on the upper portion of a visual shaft, the bottom of the visual shaft is connected with a gas injection system through a pipeline, the outer end of the communication point adjusting device is connected with a liquid injection system through a pipeline, and the top of the visual shaft is connected with a gas-liquid separator and an outlet flow measuring instrument through pipelines; (5) experimental measurement: recording the injection angle of the injection pipe at the communication point after the liquid phase injection flow is stable, and (6) replacing the injection pipe at the communication point so as to realize the adjustment of the injection angle of the kill fluid, and repeating the steps (2)-(5). The well killing simulation device has the advantages that well killing process simulation of the rescue well at different communication points can be achieved, the multiphase flow law in the well killing cylinder is revealed, and therefore the well killing effect of the rescue well under different working conditions is researched, and well killing parameters of the rescue well are optimized.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Emergency disposal method and related device for cable wire breakage and clamping
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.
Owner:CHINA NAT PETROLEUM CORP +1
Well fluid collecting device of well logging standard well
The utility model discloses a well fluid collecting device of a well logging standard well, which comprises an annular mounting cover connected to the end part of the well logging standard well, one side of the annular mounting cover is connected with a liquid density sensor and a U-shaped transmission pipe, and the U-shaped transmission pipe is connected with a first control valve and a cyclone hydraulic separator used for separating liquids with different densities. The high-density liquid output end of the cyclone hydraulic separator is connected with a well killing fluid transfer box through a first pipeline, the low-density liquid output end of the cyclone hydraulic separator is connected with a shaft outlet liquid collecting box through a second pipeline, the well killing fluid transfer box is provided with a power pump which is connected with an output pipe, the output pipe is connected with an extension pipe, and the first pipeline is connected with a second control valve. The extension pipe is connected with a third control valve.
Owner:HUANDING ENERGY SERVICES +1
A full-hole-section deflagration fracturing construction method
The application discloses a full-well-section deflagration fracturing construction method, which comprises the following steps: drilling a horizontal well and setting a region to be fractured; lowering a screen pipe into the horizontal well and injecting a well killing fluid; pouring a liquid energetic agent into a flexible non-metallic charge barrel, then installing an ignition structure on a charge end of the charge barrel; connecting an end of a coiled tubing to an upper end of the ignition structure, then conveying the charge barrel to a set position in the horizontal well through the coiled tubing, and making the charge barrel cover all the regions to be fractured in the horizontal well; igniting the ignition structure through the coiled tubing, and making the liquid energetic agent in the charge barrel deflagrate, so that high-pressure combustion gas generated by the deflagration breaks the charge barrel and does work on rocks, and the rocks are fractured; after the fracturing is completed, the screen pipe is recovered, and the charge barrel debris is recovered with the screen pipe. The application solves the problems of complicated assembly and high failure rate in the prior art when performing a super-long well section pre-fracturing operation through a high-energy gas fracturing mode.
Owner:XIAN AEROSPACE CHEM PROPULTION PLANT
Experimental device for simulating well killing effect of rescue well at different communication points
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.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Autonomous oil- and gas-bearing well killing device with fire-fighting function
The claimed invention relates to the field of safety in the oil and gas industry and can be used for prompt well killing, as well as for extinguishing wells or containers with petroleum products. The technical problem that the claimed solution shall solve involves improving safety when working on oil and gas wells. The technical result of the claimed invention is to enable the operation of an autonomous well killing device with fire-fighting function, initiated manually to kill the well or reacting to a fire at the wellhead using a thermochemical initiator while simultaneously creating pressure in the device body (vessel) to supply killing and fire extinguishing fluid that is sufficient to kill or extinguish the well. At the same time, a special feature of the autonomous well killing device with fire-fighting function is that it can be connected to an existing system of manifold pipes or pressure pipes of protected tanks and wells.
Owner:GABLIYA YURIY ALEKSANDROVICH
centrifugal pump (blowout prevention)
1. Name of the designed product: centrifugal pump (well killing). 2. Use of the designed product: the designed product is used for conveying liquid. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view 1.
Owner:TAIZHOU BONI PUMP MANUFACTURING CO LTD
An ultra-high pressure choke manifold
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.
Owner:JIANGSU JULONGHU MASCH MFG CO LTD
Offshore drilling shaft pressure control device
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.
Owner:CHINA NAT OFFSHORE OIL CORP +1
Formation pressure measuring pipe column
The utility model relates to the technical field of in-well pressure measurement, in particular to a formation pressure measuring pipe column which comprises an oil pipe, a pressure measuring element, a packer and a liquid extractor, the packer is arranged above a formation to seal the annulus between the pressure measuring pipe column and a shaft, the liquid extractor comprises a cylinder body and a piston, the cylinder body is connected with the oil pipe, and the piston is connected with the oil pipe. The piston divides an inner cavity of the pressure measuring pipe column into an upper pipe cavity and a lower pipe cavity, the piston and the cylinder body move relatively to be used for sucking well killing fluid in the lower pipe cavity of the pressure measuring pipe column so that formation fluid can flow into a shaft from a formation, and the pressure of the lower pipe cavity of the pressure measuring pipe column and the pressure of the shaft below the packer are equal to the pressure of the formation. The liquid column pressure of the well killing fluid in the upper pipe cavity and the space above the packer is separated from the pressure of the lower pipe cavity and the space below the packer, the formation pressure can be obtained by measuring the pressure of the lower pipe cavity of the pressure measuring pipe column or the pressure of a shaft below the packer, the influence of the well killing fluid in the shaft is avoided, and the formation pressure measuring accuracy is improved.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1
Controlled pressure drilling overflow well killing simulation system and method, medium and electronic equipment
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.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1
Oil well annulus liquid level opening measuring method and system
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.
Owner:杭州瑞利超声科技有限公司
Multi-stage circulating filtration and purification system for well killing fluid
ActiveCN121717525AWaste water treatment from quariesWater/sewage treatment bu osmosis/dialysisWell killTreatment pond
The invention discloses a multi-stage circulating filtration and purification system for well killing fluid, relates to the technical field of water treatment, and aims to solve the technical problem of insufficient reuse effect of well killing fluid collected under different conditions due to single-mode filtration, and the multi-stage circulating filtration and purification system comprises a control pump machine arranged at the output end of an initial filtration treatment pond; a primary filtering treatment mechanism is arranged at the output end of the control pump machine; one output end of the primary filtering treatment mechanism is provided with a secondary filtering treatment mechanism through a control valve. Based on the arrangement of the first-stage filtering treatment mechanism and the second-stage filtering treatment mechanism, the multi-stage circulating filtering and purifying system for the well fluid forms a stage-by-stage filtering mode, and targeted operation is realized by performing primary filtering, first-stage filtering, second-stage fine filtering, third-stage ultrafiltration and the like on well killing fluid used by different oil wells; therefore, the well killing fluid filtered by the multi-stage circulating filtration and purification system for the well killing fluid has the characteristic of adaptability, and the requirements of operation of different oil wells are met.
Owner:TIANJIN GANGRUI PETROLEUM ENG SCI & TECH
Method and apparatus for testing adaptability of water-based completion fluid in hydrogen sulfide-containing crude oil
ActiveCN117846542BExperimental pressure conditions are constantSimulate aptlyWell/borehole valve arrangementsSealing/packingTemperature controlWell kill
The application provides a test method and equipment for adaptability of a water-based completion fluid in hydrogen sulfide-containing crude oil. The test method comprises: detecting the completion fluid to be tested; pumping the crude oil into a high-temperature and high-pressure reaction kettle, and introducing hydrogen sulfide gas until the crude oil is saturated with hydrogen sulfide; introducing the completion fluid to be tested into the reaction kettle; heating the reaction kettle to a set temperature and adjusting the pressure to a set pressure, wherein the set pressure is the hydrogen sulfide fugacity; after the set reaction time is reached, the pressure is released, and the heating is stopped; comparing the changes of the completion fluid before and after the reaction to determine whether the completion fluid is suitable for the hydrogen sulfide-containing crude oil. The equipment comprises: a high-temperature and high-pressure reaction kettle, a hydrogen sulfide tank, a completion fluid introduction pipeline, a gas discharge pipeline, a pressure measuring device and a temperature control device. The test method provided by the application can simulate the interface reaction between the completion fluid in the well killing state and the hydrogen sulfide-containing formation crude oil, and accurately determine the adaptability of the water-based completion fluid in the hydrogen sulfide-containing crude oil.
Owner:CHINA NAT PETROLEUM CORP +2
A blowout preventer for a well service string and methods of use
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.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1
Ultra-low density leak-off workover fluid and method of making same
The present application belongs to the technical field of drilling and workover fluid, and specifically discloses an ultra-low density leak-proof workover fluid, which is composed of base fluid and micro-bubble fluid; wherein the base fluid comprises structural stabilizer, viscosity-increasing and filtration-reducing agent, pH regulator, bactericide, corrosion inhibitor, surfactant and water; and the micro-bubble fluid comprises foaming agent, bubble stabilizer and water. The preparation method of the workover fluid is as follows: first, preparing the base fluid; then, preparing the micro-bubble fluid; finally, adding the micro-bubble fluid into the base fluid and mixing to obtain the finished product. The significant effect of the present application is that the workover fluid has good viscosity-increasing and shear-increasing effects, short natural degradation period, small reservoir damage, and can be applied to various oil and gas wells with formation pressure coefficient less than 1.0, well killing and workover operation, can greatly reduce the use amount of conventional working fluid to shorten the flowback period, and has low requirement on production equipment and is easy to implement.
Owner:KELAMAYI WEITE TECH CO LTD
Well completion process for soluble tail pipe of high-pressure oil and gas well
The invention relates to the technical field of petroleum and natural gas extraction, in particular to a high-pressure oil and gas well soluble tail pipe completion technology which comprises the steps that a soluble tail pipe completion pipe string is put into a shaft; after the soluble tail pipe well completion pipe string is tripped, well completion fluid is injected from a casing pipe to replace well killing mud in a shaft in a reverse circulation mode; a setting ball is thrown into the air-tight seal oil pipe, and after the setting ball falls to a setting ball seat, the air-tight seal oil pipe presses the setting packer; after the sealing examination is qualified, the air-tight sealing oil pipe is used for pressing the setting ball and the setting ball seat to fall to the bottom of the well; and alkali liquor is injected into the air-tight seal oil pipe to the well bottom, the soluble oil pipe is dissolved, and the well is opened for production. In the well completion process, high-density well killing fluid in the perforation section can be completely replaced by well completion fluid, it is avoided that barite sediment blocks a shaft and perforation holes, and meanwhile the problems that after sand production of an oil and gas well, the sand washing and well repairing fishing difficulty is large, and a pipe column and well cementation cement are damaged by acid injection are solved.
Owner:PETROCHINA CO LTD
Well killing manifold with sand prevention and throttling functions
The utility model discloses a well killing manifold with sand prevention and throttling functions, and relates to the technical field of well killing manifolds. The well killing manifold with the sand prevention and throttling functions comprises a bottom plate and a throttling well killing manifold fixedly arranged above the bottom plate, a liquid inlet pipe of the throttling well killing manifold is fixedly provided with a filter box in a penetrating mode, and the well killing manifold has the technical effects that efficient collection and convenient cleaning of gravel are achieved through a collecting mechanism, meanwhile, the good sealing performance and stability are achieved, and the well killing manifold is convenient to use. Gravel generated by filtering slides into the collecting frame through the inclined block, the connecting frame is manually moved upwards during cleaning, related components are driven to enable the extrusion block to move into the fixing sleeve, and the collecting frame can be easily taken down; and during reinstallation, the spring and the damper act to enable the extrusion plate to move downwards, the extrusion block extends out to support the collection frame, in addition, the collection frame and the filter box are tightly sealed through the sealing ring, the stability of the whole structure is ensured through the matching of the fixing frame and the fixing sleeve as well as the matching of the bolt and the connecting frame, and the reliable operation of equipment is ensured.
Owner:JIANHU COUNTY HUASHENG MACHINERY MFG CO LTD
Tubing plug device
PendingCN122106477AConvenient backwash well operationAchieve one-way blockingWell/borehole valve arrangementsSealing/packingWell killMechanical engineering
The oil pipe blocking device provided by the embodiment of the present disclosure comprises a cylinder, a support and a sealing ball. One end of the cylinder is connected with the support, the other end of the cylinder is used for being connected with an oil pipe, and the support is located at the end of the cylinder which is away from the wellhead of the oil well. A ball seat is arranged in the cylinder, the sealing ball is located in the cylinder and between the ball seat and the support, a through hole is arranged on the ball seat, and the support provides elastic support for the sealing ball, so that the sealing ball is pressed between the support and the ball seat and seals the through hole. In the process of lowering the oil pipe into the oil well, the well killing fluid in the oil well cannot enter the inside of the oil pipe due to the blocking effect of the sealing ball, and the well killing fluid is effectively prevented from being sprayed out of the oil pipe. When the oil pipe is pressurized, the sealing ball can be separated from the ball seat due to the elastic support provided by the support for the sealing ball, so that the oil pipe blocking device is in a conductive state, thereby facilitating the backwashing operation of the oil well.
Owner:PETROCHINA CO LTD
A multi-stage circulating filtration and purification system for well killing fluid
This invention discloses a multi-stage circulating filtration and purification system for well control fluid, relating to the field of water treatment technology. It aims to solve the technical problem of insufficient effectiveness of single-method filtration in reusing well control fluids collected under different conditions. The system includes a control pump located at the output end of an initial filtration treatment tank; a primary filtration mechanism is installed at the output end of the control pump; and a secondary filtration mechanism is connected to one of the output ends of the primary filtration mechanism via a control valve. Based on the primary and secondary filtration mechanisms, this invention creates a graded filtration system for well control fluid, achieving targeted operation by performing primary filtration, secondary fine filtration, and tertiary ultrafiltration on well control fluids used in different oil wells. This results in well control fluids filtered by the multi-stage circulating filtration and purification system having adaptability characteristics, meeting the operational needs of different oil wells.
Owner:TIANJIN GANGRUI PETROLEUM ENG SCI & TECH
A choke and kill manifold for offshore oil production with pressure regulating function
The application discloses a throttling well killing manifold with pressure regulating function for offshore oil exploitation, and relates to the technical field of well killing manifolds. The throttling well killing manifold comprises a base, a four-way structure, a filtering device, a throttling device, an external connecting pipe, a liquid injection structure and a damping support. The filter hole size of the filter plate can be dynamically adjusted according to the sandstone content in oil and gas. When the sandstone content is high, the filter hole size is shrunk to realize more fine filtering effect. When the sandstone content is low, the filter hole size is increased to improve the passing amount of fluid, reduce the pressure loss caused by the increase of filter resistance, prolong the service life of the filter screen, and automatically adjust the opening degree of the throttling valve according to the pressure in the pipeline. The fluid flow keeps stable. When the pressure in the pipeline sharply rises due to abnormal conditions, the throttling valve is automatically closed to cut off the fluid passage of the pipeline, and the pressure relief device is opened to release part of the excessively high pressure, so that the pressure in the pipeline rapidly falls back to the safety range.
Owner:HONGZE DONGJUN MACHINERY
Sand control choke manifold
Owner:JIANGSU YIDELONG GASOLINEEUM MACHINERY