137 results about "Snubbing" patented technology

The invention discloses a throttling well killing manifold with a pressure adjusting 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 vibration reduction support, and the size of filtering holes of a filtering plate can be dynamically adjusted according to the content of gravel in oil gas; when the content of the gravel is high, the size of the filter holes is shrunk so as to achieve a finer filtering effect, and when the content of the gravel is low, the size of the filter holes is increased, the throughput of fluid is improved, pressure loss caused by increase of filter resistance is reduced, the service life of the filter screen is prolonged, and the throttling device can automatically adjust the opening degree of a throttling valve according to the pressure in a pipeline. When the pressure in the pipeline is sharply increased due to abnormal conditions, the throttle valve can be automatically closed to cut off a fluid channel of the pipeline, and meanwhile, the pressure relief device is started to release part of overhigh pressure, so that the pressure in the pipeline rapidly falls back to a safe range.

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 provides an ultrahigh pressure gas well ground throttling depressurization pilot production system, which belongs to the technical field of gas well pilot production, and comprises a gas production tree, a pressure test kill manifold sledge, a cyclone desander sledge, a first-stage oil nozzle manifold sledge, a second-stage electric cage throttling valve, a third-stage electric cage throttling valve, an instrument flange, an isolation flat valve and a wellhead pressure release blowout system, the pressure test well killing manifold sledge achieves pressure test of all high-pressure equipment and has the well killing function in the well emergency situation, the cyclone desander sledge can protect all levels of throttling valves and downstream production equipment against erosion, and the service cycle of the throttling valves and the downstream production equipment is prolonged. The fixed oil nozzle and the electric cage type throttle valve are connected in parallel through the first-stage oil nozzle manifold sledge, a production system can be accurately established, and the first-stage electric cage type throttle valve can be replaced and maintained without closing a well.

The invention belongs to the technical field of oil and gas well drilling, and particularly relates to an experimental device and method for simulating the overflow and leakage co-storage well killing process of a fractured-vuggy stratum. The device comprises a simulation wellbore system, a simulation drilling fluid circulation system, a simulation fracture-vug type stratum structure system, a simulation gas injection system, a data acquisition system and a data processing system. The wellbore simulation system is used for simulating a drill stem and a wellbore in an experiment; the simulated drilling fluid circulating system is connected with the upper part of the shaft system and is used for simulating injection and return of drilling fluid; the simulated fracture-vug type stratum structure system is connected with the lower part of the shaft system and is used for simulating cracks and karst caves in an experiment; the simulated gas injection system is used for injecting gas into the fracture-cavity type stratum structure system; and the data acquisition system and the data processing system are used for acquiring and processing experimental data in the experimental device. The experimental device and method provided by the invention aim at solving the problem that in the prior art, the overflow and leakage coexistence well killing process of a fracture-vug type stratum cannot be comprehensively simulated.

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 technical field of oil and gas field development, in particular to a coiled tubing velocity string wellhead device and a using method thereof, and aims to solve the technical problem of low suspension and installation efficiency of a velocity string in related technologies. According to the coiled tubing velocity string wellhead device, the descending velocity string can be fastened through the suspension mechanism, and the annulus between the velocity string and the outer barrel can be sealed through the sealing mechanism; the driving assembly is controlled to drive the rotating tool rest to rotate, the shifting fork piece synchronously rotates forwards or backwards along with the rotating tool rest, and when passing through the shifting piece gear, the shifting fork piece correspondingly rotates around the axis of the rotating shaft, so that the cutting knife is driven through the transmission assembly, and the cutting knife moves forwards to cut a speed tubular column or retreats to be separated from the end face of the speed tubular column. By the adoption of the coiled tubing velocity string wellhead device, operation under pressure can be carried out, well killing is not needed, stratum pollution is avoided, and meanwhile tedious operation such as induced flow activation after well completion of a conventional velocity string is overcome.

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.

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 fracture-vug type gas reservoir overflow and well killing law evaluation device and application, and belongs to the field of petroleum and natural gas exploration. The device comprises a fractured-vuggy formation drilling simulation system, and a high-pressure gas injection system, which is connected with the fractured-vuggy formation drilling simulation system and is used for injecting gas into the fractured-vuggy formation drilling simulation system; the circulating liquid injection system is used for injecting circulating liquid into the fracture-cavity formation drilling simulation system; the cement injection system is used for injecting cement into the fracture-cavity type stratum drilling simulation system; and the measurement recording system is used for recording data. The device is closer to the real parameter change process of the overflow kill well of the fracture-vug type gas reservoir, and has the characteristics of continuous and real simulation, multi-condition coupling, measurable multi-parameter and visible process. Experimental measurement results obtained through the method can provide experimental simulation and data support for overflow type judgment and well killing method selection during fracture-vug type gas reservoir overflow.

The invention discloses an under-pressure well process pipe column with a blowout prevention function and a construction method of the under-pressure well process pipe column. The under-pressure well process pipe column sequentially comprises a screwed plug, a screen pipe, a multifunctional under-pressure ball seat, a blowout prevention tail pipe valve, a first water distributor, a first packer, a second water distributor, a second packer and a third water distributor from bottom to top; normal water injection of the first to third water distributors is ensured; during plugging, the multifunctional under-pressure ball seat is automatically opened, so that no dead cavity is generated at the lower end of the tubular column. During normal well washing, the ball seat is closed, and water is injected into the water distributors normally. During inverse well flushing, the center channel of the ball seat is opened, and it can be guaranteed that setting can be conducted again during normal water injection. When the underground pipe column needs to be lifted, the strong magnetic ball suction pipe is put, and the lower end of the pipe column does not form a dead cavity, so that the strong magnetic ball suction pipe can smoothly move downwards; the bottom reversely seals the lower end opening of the inner sliding sleeve of the blowout prevention tail pipe valve, reliable blocking is achieved, and then underground pipe columns can be pulled out of a well mouth one by one under pressure for maintenance.

The utility model discloses a high-pressure all-purpose well killing choke manifold system, which belongs to the field of oil drilling well control equipment, and comprises an upper layer structure and a lower layer structure, the upper layer structure comprises a choke manifold and a pressure monitoring device, and the lower layer structure comprises a well killing manifold, a blowout manifold, a liquid level monitoring manifold and a slurry filling manifold. A liquid-gas separation liquid inlet pipeline connector is arranged at an outlet of the lower layer structure, and a chip installation groove used for installing an information tracking chip is further formed in the lower layer structure. The liquid level monitoring function is added, the liquid level height of a shaft can be monitored in real time, the well leakage condition is judged, and the slurry density is adjusted; the liquid level change can be observed in time, and the well control safety risk is reduced; a slurry pouring function is added; isolating valves are arranged on upstream and downstream of a throttle valve in the throttle manifold; a chip mounting groove is formed, so that powerful support is provided for informatization construction of well control equipment; and during ultrahigh pressure blowout, the three blowout manifolds work at the same time, the blowout speed is three times of the original blowout speed, and the well control safety risk is greatly reduced.

The throttling well killing device comprises a height adjusting structure, a position adjusting structure is fixed to the upper side of the height adjusting structure, a throttling well killing structure is detachably installed on the position adjusting structure, a recycling structure is embedded in the position adjusting structure, and an energy-saving structure is detachably installed on the upper side of the position adjusting structure. The height adjusting structure comprises a bottom box, a first height adjusting assembly is embedded in the bottom box, a bottom plate is fixed to the upper side of the first height adjusting assembly, the bottom box limits and fixes the bottom plate through a limiting assembly, the first height adjusting assembly comprises a hydraulic cylinder, and the hydraulic cylinder drives a first shock absorber through a hydraulic rod to telescopically adjust the position of the bottom plate. The throttling and well killing device with the sand prevention structure automatically treats sand and stones, automatically adjusts the height, automatically gives an alarm and recycles oil when oil leaks, automatically protects the throttling and well killing device, and has the advantage of saving energy at the same time.

The invention discloses a remote control offshore unmanned platform positive and negative circulation well washing and killing system and process, the system comprises a water injection manifold, a killing manifold, a closed discharge manifold and a mixed transportation subsea pipeline, and a remote control hydraulic control ball valve group, a first remote control electric oil nozzle, a flowmeter and one or more pressure transmitters are sequentially arranged between the water injection manifold and the killing manifold; the well killing manifold is respectively connected with the well killing pump, the pressure relief pipeline and the Christmas tree service manifold, the pressure relief pipeline is connected with the closed discharge manifold, the Christmas tree service manifold is connected with the mixed transportation subsea pipeline, the pressure relief pipeline is suitable for remote opening and closing pressure relief, and the Christmas tree service manifold is suitable for remote control opening and closing of positive and negative circulation well washing and killing operation. According to the system, positive and reverse circulation well washing and killing, annulus fluid infusion, oil pipe positive extrusion and oil pipe seal examining operation can be remotely and rapidly carried out in a central processing platform (CEP) or an unmanned platform central control room, the technological process is simple, and operation is convenient.

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 invention discloses a method for replacing a slip type wellhead casing hanger, which relates to the technical field of petroleum wellhead equipment, and comprises the following steps of: 1, killing a well, pulling out a production pipe column, and detaching a Christmas tree and a gas production four-way joint; 3, loosening a screw of the inverted slip, and dismantling a base, connected with the casing, of the first-stage casing head; fourthly, a 10 cm annular groove is cut downwards at the position 2-3 m below the connecting position of the surface layer casing pipe and the casing pipe; fifthly, the casing head is knocked downwards, so that the casing head is separated from the slip connected with the upper production casing; sixthly, a slip in the casing head is taken out; and seventhly, the casing head is taken out, and the surface casing is cut and polished again. According to the slip type wellhead casing hanger replacing method, an old oil and gas well casing head, connected through a slip type hanger, of a production casing can be replaced with a high-pressure-grade casing head, the requirement of a new technology is met, and the purpose that an old well hole is reused is achieved.

The invention discloses a shaft pressure experiment testing system and method in the well killing process under complex working conditions. The shaft pressure experiment testing system comprises a target high-pressure stratum simulation device, a shaft, a drill string, a blowout preventer, a drilling fluid storage pool, a well killing fluid storage pool, a slurry preparing pool, a slurry pump, a high-pressure gas storage tank, a drilling tool lifting device, a first tee joint, a water hose, a data receiving terminal and a drill bit. The shaft is respectively communicated with the blowout preventer and the target high-pressure stratum simulation device; the left end of the first tee joint is communicated with the slurry pump through a pipeline, the right end of the first tee joint is communicated with the first electric valve through a pipeline, and the upper end of the first tee joint is communicated with the top end of the drill column through a water hose. The top end of the drill column is connected with the drilling tool lifting device; and the high-pressure gas storage tank is communicated with the target high-pressure stratum simulation device through a pipeline. According to the invention, multiple working conditions can be combined, well killing modes under different complex working conditions can be simulated, and the wellbore pressure in the well killing process can be predicted.

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 invention discloses a gas storage liquid drainage and gas injection and production method and a tubular column, and is characterized in that under the working condition that a gas injection and production layer is positioned above a liquid drainage layer, a production sleeve, an oil pipe, an upper packer, an injection and production circulating valve, a lower packer and a liquid drainage circulating valve are arranged in the production sleeve in a concentric manner; the periphery of the upper portion of the oil pipe and the periphery of the lower portion of the oil pipe are packed through the upper packer and the lower packer respectively, the injection-production circulating valve is located in the oil pipe and located between the upper packer and the lower packer, and the liquid drainage circulating valve is located in the oil pipe and located below the lower packer. The functions of liquid drainage, gas injection and gas production are achieved on one integrated tubular column at the same time, the problems that during oil and gas reservoir type and aquifer gas storage building, well killing and tubular column lifting are needed in the liquid drainage and injection-production conversion process, reservoir pollution exists, the cost is high, and the well control risk is high can be solved, and the functions of a liquid drainage well and an injection-production well are unified; and the safety and the economical efficiency of building the storage cavern are improved.

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.