152 results about "Well cementing" patented technology

The application provides an organic-inorganic grafting type suspension stabilizer, a raw material composition and a preparation method thereof and a cement slurry. The raw material composition comprises: 15-45 parts of a sulfonic acid group monomer, 60-180 parts of a hydrophobic monomer, 1-15 parts of a cationic monomer, 1-15 parts of an ether monomer containing an allyl group and modified inorganic material; wherein the modified inorganic material is obtained by modifying 0.1-1.5 parts of inorganic material by 1-15 parts of a vinyl organosilicon monomer. The organic-inorganic grafting type suspension stabilizer provided by the application can maintain good sedimentation stability of the cement slurry at a higher bottom hole circulating temperature, can effectively eliminate free liquid, does not affect the cement slurry grouting and cementing, has no adverse effect on the cement slurry thickening and fluid loss, and can meet the demand of most deep well cementing.

The application discloses a kind of downhole filling hole fast construction method, it is related to mining exploitation technical field, and its technical scheme main point is: the construction method includes equipment preparation and installation, installation wellhead device, pneumatic down-the-hole hammer percussion drilling, borehole inclinometry, down filling pipe and well cementation etc. steps.Compared with prior art, mainly corresponding adjustment is made to equipment preparation and installation, installation import device, pneumatic down-the-hole hammer percussion drilling three steps, solve the problem of large equipment size, disintegration difference, improve the efficiency of drilling rock, solve the problem of dust flying, realize from surface to downhole any middle section construction through construction filling hole, realize environmental protection construction, realize the green, cycle and sustainable development of mine.

The utility model discloses a laboratory sewage discharge device of well cementation, include: collection bag, first sedimentation tank, second sedimentation tank and third sedimentation tank, first sedimentation tank is connected with second sedimentation tank, second sedimentation tank is connected with third sedimentation tank, the lower end of first sedimentation tank, the lower end of second sedimentation tank and the lower end of third sedimentation tank all are provided with gyro wheel, and the inside of first sedimentation tank, second sedimentation tank and third sedimentation tank all are provided with collection bag. Through the application of the utility model, a laboratory sewage discharge device of well cementation is provided, which is movably arranged by being provided with gyro wheels and collection bags, so that the device is not only convenient for cleaning the cement in the sedimentation tank, but also convenient for transferring the device as a whole when the laboratory is relocated. In addition, the device is provided with three-stage sedimentation and multiple filtration, which can greatly reduce the residual amount of solid substances and cement in the sewage, so that the sewage can meet the industrial wastewater discharge standard when discharged, and effectively reduce the pollution to the environment.

The application relates to a device and a method for testing the bonding strength between a casing and well cement by using rotary torque, and belongs to the technical field of drilling material detection. The device comprises a test sample, a slip, a joint and a load applying device. Power is generated by a power device of a rotary dynamic torque tester to form rotary output, which drives a wellbore simulation casing to rotate. The wellbore simulation casing and a cement sheath fixed on a cementing cylinder are relatively displaced to form rotary torque. A torsion meter reads and records the torsion value when the cementing interface is damaged in real time, and the maximum value of the torsion value is taken as an index for representing the cementing strength. The device disclosed by the application is simple and convenient to operate, simple in structure, low in cost and reusable, and can be widely applied to the measurement and evaluation of the cementing performance of casings and well cement of different wellbore sizes.

The utility model discloses a rotatable hydraulic tail pipe hanger, it includes from top to bottom connection's back in turn, setting and hanger body, the back is used for connecting the tool of sending and placing, the setting is used for transmitting torque, the hanger body includes mandrel, fixed sleeve, slip, rotary sliding mechanism and piston jar, the fixed sleeve installs in the mandrel outside, and it is opened to have the installation groove on it, the slip is installed in the installation groove, and its outer surface is located in the installation groove inside, the rotary sliding mechanism is used to make setting and the fixed sleeve with the mandrel can relatively rotate after hanging, the slip of the utility model adopts the design of built -in, namely the outer surface of slip is located in the installation groove of fixed sleeve, avoids the direct contact with the well wall or the last layer casing in the process of lowering, reduces the risk of jam. Meanwhile fixed sleeve and hanger body can relatively rotate through rotary sliding mechanism, and when cementing, rotation can greatly improve the cementing quality.

The present application relates to the technical field of well cementation evaluation, and particularly relates to a double casing well cementation quality evaluation method, device, equipment, medium and product, wherein the method comprises the following steps: performing logging on a cemented well section of a double casing well to obtain casing-cement composite mode wave data of the cemented well section; performing logging on a to-be-evaluated well section of the double casing well to obtain casing-cement composite mode wave data of the to-be-evaluated well section; comparing the casing-cement composite mode wave data of the to-be-evaluated well section with the casing-cement composite mode wave data of the cemented well section to evaluate the cementation quality of the to-be-evaluated well section of the double casing well; and the cementation quality of the double casing well can be comprehensively evaluated.

This invention relates to the field of oil well cementing technology, and discloses a slow-release nano-early strength agent, its preparation method, and cement slurry. The slow-release nano-early strength agent includes a carrier and an early strength agent loaded on the carrier. The carrier comprises halloysite nanotubes, and the early strength agent comprises one or more of chloride, sulfate, nitrate, and organic compounds. The weight ratio of the early strength agent to the carrier is (5-30):100. This invention utilizes the unique cavity structure of halloysite nanotubes and the strong interfacial interaction with cement to synthesize a slow-release nano-early strength agent, thereby improving the early strength of cement and extending the cement thickening time.

This invention discloses an emergency mud treatment system for electric cementing trucks, including a power switching valve assembly. The actuator end of the power switching valve assembly is connected to a centrifugal pump drive motor and a speed control valve. The power source port of the power switching valve assembly is connected to an emergency hydraulic pump assembly and a motor-driven hydraulic pump assembly. The emergency hydraulic pump assembly is connected to an emergency power system. The outlet end of the speed control valve is connected to a stirring motor, and the outlet of the stirring motor is connected to a hydraulic oil tank. This invention also discloses an emergency treatment method for the emergency mud treatment system for electric cementing trucks. This invention solves the problem of mud not being discharged from the mixing tank during power supply failures in current electric cementing trucks, reducing the risk of equipment and property damage caused by mud solidification and improving equipment safety and reliability. Utilizing a highly integrated power switching valve assembly, it achieves power switching of the equipment's hydraulic power source in emergency situations. The pipeline is simple, occupies little space, achieves intelligent emergency mud treatment, has a simple structure, and low manufacturing cost.

The application discloses a horizontal well section interval optimization method based on cement ring integrity dynamic constraint, and belongs to the technical field of unconventional oil and gas development engineering. The method constructs a non-uniform cementing mechanics model based on a casing eccentricity to lock a stress target, activates a transient fluid-solid coupling mechanism to solve an expansion load, and extracts a spatial stress disturbance scalar. Nonlinear fatigue evolution under alternating load is tracked, and a double-mode safety tolerance limit that locks the body damage and interface anti-channeling is constructed. Finally, the optimal section interval is output by taking the rigid constraint as the driving force for multi-objective optimization. The application optimizes the yield target and wellbore integrity, accurately avoids hidden engineering risks such as annular pressure from the source, and maximizes the comprehensive development benefit of a single well.

This invention belongs to the technical field of cementing devices, specifically relating to a foamed cement slurry cementing device. It aims to solve the problem of uneven foam distribution within the foamed cement slurry that ultimately settles on the wellbore, reducing cementing quality. The invention includes a reinforcement pipe, a delivery pipe, an external wellbore base, a return assembly, a drive assembly, and an injection head. This invention can introduce foamed cement slurry from well sections with higher foam content back into well sections with lower foam content for circulation, thereby ensuring the uniformity of foam distribution and size within the foamed cement slurry during its flow through the delivery pipe and return cavity, thus improving cementing quality.

The application provides a rotatable tail pipe hanger with high mechanical strength and relates to the technical field of well cementing. The tail pipe hanger comprises a mounting seat, a groove is formed in the top end of the mounting seat, and guide teeth are fixedly connected in an annular array on the top end surface of the mounting seat. The guide teeth and the mounting seat jointly form a transmission structure. The tail pipe hanger can be quickly adjusted in the direction according to different mounting clamping positions when the tail pipe needs to be connected in a narrow space such as a downhole, thereby improving the installation efficiency of the tail pipe and the subsequent well cementing operation. When the main pipe is connected with a cover and other components, the drive can drive the rotation of the bevel gear, the bevel gear is meshed with the guide teeth fixedly connected to the top end surface of the mounting seat, the main pipe can be quickly adjusted in the direction according to the different required assembly positions, and the assembly efficiency is improved.

The application provides a device and method for measuring the liquidity of cementing slurry under the influence of temperature and pressure coupling in middle-deep well cementing, the bottom of the stirring bin is connected with the inside of the quantitative feeding bin, the temperature and pressure environment storage cylinder and the discharge hopper from top to bottom in sequence; the stirring bin is provided with a reverse flow stirring mechanism; the quantitative feeding bin is provided with a quantitative feeding mechanism; the temperature and pressure environment storage cylinder is provided with a temperature and pressure mechanism; the driving shaft comprises a reverse flow stirring driving section and a quantitative feeding driving section which are coaxially integrated; the rotation of the reverse flow stirring driving section around the central axis can drive the reverse flow stirring mechanism to rotate around the radial center line; the rotation of the quantitative feeding driving section around the axial center line can drive the quantitative feeding mechanism to rotate around the axial center line. The reverse flow stirring mechanism can stir the cementing slurry at different speeds, so that the liquidity measurement operation is carried out in the real preparation state, thereby improving the accuracy and polymorphism of the measurement data.

A treatment fluid for performing one or more pre-cementing operations in a wellbore can include a base fluid, a viscosifier, and a crushed glass material. The viscosifier can be dispersed in the base fluid. The crushed glass material can be dispersed in the base fluid for performing one or more cementing operations with respect to the wellbore.

This invention relates to the field of casing cementing technology, specifically to a casing cementing device and method for horizontal well drilling, comprising: a casing, and a groove formed on the outer circumference of the casing, wherein a sealing disc slidably connected to the groove is slidably installed inside the casing; a positioning support mechanism disposed on the casing and connected to the sealing disc, wherein an elastic component connected to the positioning support mechanism is also disposed on the casing; and a conduction control mechanism disposed on the sealing disc and connected to the casing, wherein a follower rotation mechanism connected to the conduction control mechanism is disposed on the sealing disc and connected to the conduction control mechanism, wherein the conduction control mechanism can operate when the sealing disc moves, and adjust the conduction state between the sealing disc and the conduction control mechanism through the follower rotation mechanism. This application enables the casing to be positioned and fixed by the positioning support mechanism when the gas pressure inside the casing changes, thereby ensuring smooth subsequent casing installation.

Composite cement compositions and slurries for treating a well following a water-based wellbore operation are provided and comprise cement comprising at least one of cement particles and cementitious material, water, and water swellable particulates that are embedded in the cement, derived from an elastomeric material, and present at a concentration of at least about 2 % by weight of the cement but no more than about 30 % by weight of the cement. Methods for treating a well drilled with a water-based drilling mud are provided and comprise pumping the composite cement compositions and slurries into the well and treating the well by allowing the composite cement compositions and slurries to set or cure after being pumped into the well.

A method of cementing a wellbore includes injecting into the wellbore a cement slurry containing: an accelerator composite having a shell encapsulating a core including an accelerator and a disintegrating agent, the disintegrating agent including at least one of a phase change material or a gas-producing material; a cementitious material; and an aqueous carrier; and releasing the accelerator from the accelerator composite.

The application relates to the technical field of reaction kettles, and discloses a fluid loss additive production device for well cementing and a production method thereof. The fluid loss additive production device for well cementing comprises a reaction modification unit, the reaction modification unit comprises a reaction kettle main body, a stirring mechanism, an online monitoring mechanism and a control end, the stirring mechanism comprises an upper stirring assembly and a bottom stirring assembly arranged at the lower end of the upper stirring assembly, and the upper stirring assembly comprises a driving motor, a stirring shaft, a lifting base, a plurality of stirring blades and an angle adjusting piece. The stirring mechanism is designed, the layered stirring structure form of the bottom fixed stirring piece and the upper adjustable stirring piece is adopted, and the self-adaptive adjusting algorithm is matched, so that the real-time dynamic automatic adjustment of the stirring height and the angle is realized, the dynamic change of the material parameters in the whole period of the fluid loss additive synthesis can be adapted, the uniformity of the material mixing in the kettle is improved, and the problems of kettle bottom deposition, local overtemperature and uneven mixing are solved.

The application discloses a low-temperature early-strength low-density cement-based material for deepwater cementing and a preparation method thereof, and the cement-based material comprises 54-70wt% of cementitious material, 20wt% of active material, 3-6wt% of strength enhancing material, 5-15wt% of density adjusting material, 1-3wt% of fluid loss additive and 1-2wt% of dispersant in percentage by weight; the cementitious material is prepared by mixing G-grade oil well cement and superfine portland cement at a mass ratio of 7:3; and the active material is prepared by mixing metakaolin and microsilica at a mass ratio of 1:1. The application is prepared by using solid waste as raw material, which helps to reduce environmental pressure, has the characteristics of green environmental protection, low cost and the like. The cement-based material prepared by the application has good engineering performance in a low-temperature environment, fast early-strength development, micro-expansibility, short setting time and strong anti-channeling capacity.

The present application relates to oil and gas well engineering cementing material field, disclose a kind of in oil and gas well reconstruction wellbore cementing operation method, wherein, the method comprises: with aqueous epoxy resin, first part cement and second part cement preparation cement slurry, then cement slurry is injected into cement sheath;Wherein, the weight ratio of aqueous epoxy resin, first part cement and second part cement is 1:30-60:75-125;The epoxy equivalent of the aqueous epoxy resin is 900-1300g / eq, D50 is 0.3-0.4 μm, D90 is 0.4-0.5 μm;The ratio of D50 of first part cement and second part cement is 1.5-10:1, and the ratio of D90 is 1.5-4.5:1.The obtained cement slurry has higher compressive strength and lower elastic modulus, while the fluidity is better, and the cement slurry density meets the needs of different pressure system shale gas reconstruction wellbore.

The application provides a heat exchange well, a construction method of the heat exchange well and a heat extraction method of the heat exchange well, relates to the technical field of heat exchange wells and comprises a well shaft, the well shaft is sequentially penetrated by a non-heat reservoir and a heat reservoir from top to bottom, the inside of the last stage casing of the well shaft is provided with a partition plate extending along the axial direction of the casing, the well shaft is divided into a first chamber and a second chamber, and the lower ends of the first chamber and the second chamber are communicated; the non-heat reservoir section of the well shaft is cemented by using heat preservation cement, the heat reservoir section is cemented by using heat conduction cement, and a heat conduction cement plug is reserved at the bottom of the well, a novel heat exchange well is provided, the heat exchange well is simple in structure, good in heat exchange effect and easy to construct.

The present application relates to the technical field of cementing spacer fluid cleaning efficiency, and is a cementing spacer fluid oil-based mud cleaning efficiency evaluation device and method, the former comprising a simulation mechanism, a mud injection mechanism, a mud recovery container, a mud circulating mechanism, a spacer fluid injection mechanism, a spacer fluid recovery container and a cleaning effect detection mechanism, the simulation mechanism comprising a simulated wellbore and a simulated casing, the simulated wellbore being an upwardly open cylindrical container, and the lower part of the simulated casing being located in the simulated wellbore. The present application has a reasonable and compact structure and is easy to use. By setting the simulated wellbore, the simulated casing and the related mechanisms, the mud circulating process and the actual spacer fluid displacement oil-based mud process are simulated, the cleanliness of the inner wall of the simulated wellbore is detected by the cleaning effect detection mechanism, and thus the cleaning efficiency of the spacer fluid on the oil-based mud is evaluated, providing an important reference for the selection of cementing spacer fluid.

The present application belongs to the technical field of drilling, and particularly relates to a hydraulic casing centralizer and a use method thereof. The hydraulic casing centralizer comprises an upper joint and a lower joint. A sliding assembly is slidably connected in the upper joint. An operating plate is connected to one end of the sliding assembly facing the lower joint. A centralizing arm is hingedly connected to one end of the lower joint facing the upper joint. The wedge shape on the operating plate matches the wedge shape on the centralizing arm. A hydraulic separation device and a flow channel are arranged on the sliding assembly. Liquid flows into the space between the sliding assembly and the upper joint through the flow channel. The hydraulic separation device drives the operating plate to move towards the centralizing arm according to the pressure setting value. A limiting assembly is arranged between the sliding assembly and the upper joint to limit the position of the operating plate after movement. The operating plate drives the centralizing arm to rotate and support the well wall by using the wedge shape matching the centralizing arm. The centralizer forces the casing string to be centered in the wellbore, thereby improving the cementing quality.

This invention discloses a cementing quality evaluation system and method for deep shale gas wells, belonging to the technical field of cementing quality evaluation for deep shale gas wells. The cementing quality evaluation system for deep shale gas wells includes a data collection component connected to a data set module for data aggregation. The data set module is connected to a strength evaluation component for assessing the strength of cement sheath bonding and a network training component for training a neural network. The network training component is connected to a structure determination component for determining the neural network structure. The structure determination component is connected to a real-time evaluation component for evaluating the cementing quality of shale gas wells. The network training component is connected to the real-time evaluation component. This invention effectively solves the problems of long evaluation time, high cost, and inaccurate evaluation results in existing shale gas well cementing quality evaluation methods.

The present application relates to the intelligent control technology field of continuous production and chemical process of petroleum cementing additives, in particular to a continuous production big data analysis and regulation method for high-temperature stabilizer of cementing slurry, comprising: collecting process state time series data and synchronous control instruction data of a reaction kettle, a jacket heat exchange loop, a stirring driving part and an online viscosity detection part and aligning; constructing a normal working condition benchmark model based on polymerization kinetics constraints and jacket heat exchange heat balance constraints; loading disturbance parameter forward deduction to generate a set of theoretical abnormal states; determining a target abnormal state through similarity calculation of real residual vector and theoretical residual vector set; generating and outputting regulation instructions to a control execution end; the present application realizes stable closed-loop regulation and control of the continuous production process, and reduces the risk of single-point threshold misregulation.

This invention relates to the field of oil and gas field drilling and cementing technology, and in particular to a broad-spectrum anti-fouling isolation fluid for ultra-deep well cementing and its preparation method, comprising the following components: a zwitterionic nanocomposite polymer, a composite flushing agent, a weighting agent, and water; the zwitterionic nanocomposite polymer is an organic-inorganic hybrid copolymer with surface-silanized modified nano-silica as an inorganic crosslinking core, and polymeric segments copolymerized and grafted onto the surface of the inorganic crosslinking core; the monomers of the polymeric segments include N,N-dimethylacrylamide, 2-acrylamido-2-methylpropanesulfonic acid, N-vinylpyrrolidone, dimethyl diallyl ammonium chloride, and isopentenyl polyoxyethylene ether; the composite flushing agent contains alkyl glycosides and alkyl sulfobetaine surfactants.

The utility model discloses a well cementing casing centralizer, its main body structure adopts spring steel seamless steel tube after cutting, and the integral type main body structure that is formed after the overall processing of further processing is formed, the integral type main body structure includes: the upper sleeve and lower sleeve of accommodating and being set in the casing at upper and lower ends, and multiple centralizing ribs are arranged longitudinally between the upper sleeve and lower sleeve and are located in the middle part, multiple centralizing ribs are arranged on the outer circumferential surface of upper sleeve and lower sleeve along the circumferential direction of upper sleeve and lower sleeve and are integrally formed and are connected with upper sleeve and lower sleeve, and the centralizing rib is outwardly inclined from upper and lower ends to the axis of casing in the middle part, a stress groove is arranged in the middle position of each centralizing rib to increase the reset force after deformation, and fluid flow channel is formed between the adjacent two centralizing ribs. The application can guarantee the casing centralization, smoothly enter the well, and is not easy to be damaged, and the well cementing quality is guaranteed.

The application discloses a cement ring micro-gap evaluation device, a differential pressure calculation method and an evaluation and correction method, relates to the technical field of well cementing integrity evaluation, and comprises a kettle body and a sleeve, the kettle body is coaxially arranged outside the sleeve, and an annular cavity is formed between the kettle body and the sleeve; a sealing element is arranged to seal the upper and lower ends of the inner cavity of the sleeve and the annular cavity; a pressure injection system and a pressure control system are arranged, the pressure control system is connected with the pressure injection system; the sleeve is elastic; further comprising a fluid supply assembly for providing fluid through the micro-gap; a pressure measurement assembly is arranged to measure the fluid pressure values of the upstream and downstream of the micro-gap respectively; and a metering element is arranged to be matched with the fluid supply assembly. The application can solve the problems of evaluation and prediction model verification of the sealing and seepage capacity of the micro-gap under different pressures, and provides a scientific and feasible technical scheme for well cementing integrity evaluation.

This invention provides a real-time monitoring and control system for the performance of oil well cement slurry, relating to the interdisciplinary fields of oil and gas drilling engineering and artificial intelligence. The system includes a multi-source heterogeneous data sensing module, an edge computing preprocessing module, a performance prediction and anomaly early warning module, an intelligent decision-making and control module, an equipment execution control module, and a cloud-based data management and model update module. The multi-source heterogeneous data sensing module collects real-time physicochemical parameters of the cement slurry, downhole environmental parameters, and cementing equipment operating parameters. The edge computing preprocessing module cleans, fuses, and extracts features from the raw data. The performance prediction and anomaly early warning module, based on an ensemble learning model, inputs the preprocessed feature data. Through real-time acquisition of all parameters, accurate prediction and early warning, closed-loop precise control, and continuous model optimization, the system comprehensively improves cementing quality and intelligence levels.

This invention discloses an intelligent control method and system for cementing head operations, belonging to the technical field of oil and gas well cementing tools. Specifically, the method includes establishing a working condition vector by collecting cementing head operation data, calculating the real-time ratio of pressure change rate to flow rate change rate, comparing it with stage characteristic thresholds, and determining the current operation stage and abnormal trend type by combining the rubber plug position and valve opening. In each control cycle, a cost function is constructed based on the current operation stage and abnormal trend. The valve opening correction amount and rubber plug release time offset that minimize the cost function are used as correction parameters to control the cementing operation process. This maintains stable control accuracy within the operation cycle while achieving dynamic correction of abnormal situations, improving the adaptability of cementing operations, operational safety, and cementing quality.