79results about How to "Meet the needs of on-site construction" patented technology

The invention discloses a well-killing workover method used with water plugging. The well-killing workover method sequentially comprises the following steps of (1) calculating the use level of required well-killing fluid according to volume of a shaft; (2) determining the density of the well-killing fluid according to formation pressure; (3) determining polymer gel formula which is not easy to degrade in an operation period at formation temperature according to the formation temperature, or determining a gel particle type matched with the size of a pore throat according to characteristics of porosity-permeability of a reservoir; (4) preparing polymer gel or gel particle liquor; and (5) pumping the well-killing fluid into the shaft to perform underground construction operation. By the well-killing workover method, thinking limitation that temporary plugging or lost circulation prevention is often used to recover capacity in existing well-killing workover is overcome, the polymer gel or gel particles with a selective water plugging function serves as the well-killing fluid, two yield increasing technologies comprising oil well water plugging and reservoir temporary plugging protection are combined, a synergistic effect of the two yield increasing technologies is achieved, the capacity after workover of an oil well is improved to a maximum extent, and the well-killing workover method has a wide application prospect in the field of workover of intermediate-high water cut oilfields.

A completion design method by bottom water reservoir horizontal well segregated water control includes the steps of determining horizontal well water control well sections by analyzing and determining the well sections needing to be packed during segregated completion according to collected data information, and defining final water control well sections; performing optimization design of a segregated scheme by determining reasonable segregated number and segregated length according to the final water control well sections; performing optimization design of a completion scheme by taking minimum difference of water breakthrough time of the water control well sections of the segregated scheme and minimum completion total additional percolating resistance as a principle, optimizing to obtain reasonable liquid production capacity and additional resistance values of the water control well sections, and determining throttling passage parameters of the water control well sections; and performing horizontal well segregated water control completion construction by performing construction of the water control completion scheme according to the reasonable liquid production capacity, the additional resistance values and the throttling passage parameters, and controlling the liquid production capacity of each water control well section to achieve water control and oil stabilization.

The invention discloses a method for testing the cementing strength of a cement first cementing surface of an oil well. The method comprises the steps of: (1) making a simulated casing-cement ring combined structure sample; (2) vertically placing the simulated casing-cement ring combined structure sample, and clamping the two ends on a hydraulic tensile testing machine; starting the testing machine, loading the sample slowly and uniformly to obtain a yield load value F; stopping loading immediately after the sample is broken, obtaining the load value at this time which is the maximum load value F<max>; reading the extension length L of a yield stage on a force-extension graph; calculating the cementing strength between a cement stone and the parallel portion of a metal tensile rod, that is, the cementing strength of the cement first cementing surface. The method for testing the cementing strength of the cement first cementing surface of the oil well is reliable in principle, easy and convenient to operate, can simultaneously test the cementing strength and the tensile strength of the cement stone, optimizes the cement slurry formula, obtains a cement slurry system meeting on-site construction requirements, and has broad market application prospect.

The invention discloses a gel fracturing fluid prepared from oilfield sewage and a preparation method thereof. The gel fracturing fluid comprises the following components in percentage by weight: 0.01-1% of water quality regulator, 0.01-0.5% of bactericide, 0.1-0.8% of thickener, 0.1-0.5% of crosslinking agent, 0.01-0.5% of viscosity breaker and the balance of oilfield sewage. The gel fracturing fluid prepared from oilfield sewage has favorable temperature resistance and shear resistance, and satisfies the demands for on-site construction. The gel fracturing fluid prepared from oilfield sewage relieves the demands of hydraulic fracturing for water resources, and solves the problem of treatment of oilfield sewage. The gel fracturing fluid prepared from oilfield sewage has the advantages of favorable clay swelling resistance and low formation damage rate, thereby reducing the use of the antiswelling agent and saving the cost. The gel fracturing fluid prepared from oilfield sewage has wide formation application range, avoids damage to the formations which are sensitive to alkali, acid and the like, has favorable economic benefit and environmental benefit, and is suitable for popularization and application.

Provided is a slickwater fracturing fluid suitable for being used at a hypersalinity condition. The slickwater fracturing fluid is prepared from, by mass, 0.15-0.45% of polymer viscosifier, 0.05%-0.15% of chelating agent, 0.05%-0.15% of dispersing agent, 0.02%-0.05% of clay stabilizer, 0.30%-0.50% of structure stabilizer, 0.02%-0.06% of gel breaker and the balance water. The slickwater fracturingfluid has the advantages of being low in viscosity, friction and cost and easy to recycle, easily flowing back and the like; the problems are mainly solved that at the hypersalinity condition, polymers are poor in salt resistance and sand-carrying stability and does not easily disperse; the problem can also be solved that vegetable glue fracturing fluid easily rots; after being filtered, flow-backliquid can be further directly recycled, and requirements of large-scale fracturing construction of compact oil-gas reservoirs can be effectively met.

The invention discloses a preparation method of a wetting agent used for an oil-based drilling fluid. The method comprises the following steps: mixing and stirring vegetable oil fatty acid and maleic anhydride or fumaric acid or acrylic acid, heating the obtained mixture to 200-220 DEG C, carrying out a reaction for 2-4 h, and cooling the obtained reaction product to 130 DEG C; adding diethylenetriamine, and carrying out heating dehydration until no water is separated out at 260 DEG C; adding the vegetable oil fatty acid with the amount being 1.1-1.25 times the first-time addition amount of the vegetable oil fatty acid, heating the obtained mixture to 220 DEG C, and separating out water until no water can be separated out; and cooling the obtained material to 130 DEG C, adding xylene with the amount being 0.7 times the weight of the first-time addition amount of the vegetable oil fatty acid in order to realize dilution, and carrying out uniform stirring. The high-temperature and high-pressure filter loss of the oil-based drilling fluid using the wetting agent after 260 DEG C high temperature hot rolling for 16 h is 2.2-4.0 ml, the change of the apparent viscosity and the plastic viscosity before and after the hot rolling is small, the oil-based drilling fluid using the wetting agent has good rheological property and low plastic viscosity, facilitates the improvement of the mechanical drilling speed, and after the hot rolling, the emulsification stability is good, and the demulsification voltage is 1000 V or above.

The invention discloses an atomization foam drilling fluid. The drilling fluid comprises the following components by weight percent: 1.5-2.0% of high temperature resistant foaming agent, 1.0-1.5% of clay stabilizer, 0.05-0.1% of foam stabilizer, 1.5-2.0% of blocking anti-sloughing agent, 2.0-3.0% of high temperature resistant fluosilicic anti-sloughing agent, 0.5-1.0% of defoamer and the balance of water. The drilling fluid successfully solves the technical problems of bit bailing, bit sticking by mud ring, well wall spalling, well wall collapse and the like encountered by gas drilling under the condition of formation water production, and overcomes a significant bottleneck in the gas drilling process.

The invention discloses an oil-based drilling fluid and its preparation method. The waste edible oil oil-based drilling fluid comprises the ingredients of waste edible oil, sulfite, a main emulsifier, an auxiliary emulsifier, organoclay, a filtrate reducer, a wetting agent and a barite; the preparation method of the waste edible oil oil-based drilling fluid comprises the following steps: preparing an oil phase by waste edible oil and sulfite, and then adding the main emulsifier, the auxiliary emulsifier, the organoclay, the filtrate reducer, the wetting agent and barite. The prepared trench oil oil-based drilling fluid takes waste edible oil as a base oil to substitute diesel oil or crude oil, the cost is low, the environment is friendly, the well wall stability is good, the inhibition performance is strong, lubrication performance and rheological performance are excellent, anti-sloughing inhibition performance and high temperature stability are good, construction requirement for the drilling well can be better satisfied, and the oil-based drilling fluid and its preparation method can provide a new approach for using the waste edible oil in the reasonable mode.

The invention discloses a high-temperature stabilizer for high-density cement paste, and a preparation method thereof. The high-temperature stabilizer comprises, by weight, 76-84 parts of bentonite, 10-14 parts of modified diutan gum and 6-10 parts of a cross-linked copolymer, wherein the modified diutan gum is obtained by graft copolymerization of diutan gum with sodium p-styrenesulfonate and 2-acrylamide-2-methylpropanesulfonic acid; and the cross-linked copolymer is a cross-linked copolymer formed by copolymerizing 2-acrylamide-2-methylpropanesulfonic acid, acrylamide, dimethyl diallyl ammonium chloride, N-vinyl caprolactam and divinyl benzene, and the molecular weight of the cross-linked copolymer is 7-9 * 10<5>. The high-temperature stabilizer has the characteristics of high viscosityat low temperature and tackifying at high temperature, remarkably improves the high-temperature stability of cement paste, solves the problem of poor high-temperature stability of the existing cementpaste, has no adverse effect on the comprehensive performance of the cement paste, and meets the requirements of field construction; and in addition, the preparation method of the stabilizer is simple, conditions are controlled, the cost is low, and the stabilizer has market popularization and application prospects.

The invention discloses a movable field X-ray rolling shooting device for a pipeline, and belongs to the technical field of flaw detection. The movable field X-ray rolling shooting device for the pipeline comprises a supporting frame, an operating mechanism and a walking mechanism, wherein the supporting frame is mounted on the external surface of a to-be-detected pipeline; the operating mechanism is mounted on the supporting frame; the walking mechanism is located between the operating mechanism and the to-be-detected pipeline. The movable field X-ray rolling shooting device for the pipeline, which is provided by the invention, is reasonable in structural design and is simple to make; not only can the special putting up of a detecting platform for an X-ray flaw detector be avoided and can the engineering cost be reduced, but also the all-around flaw detection for welds on the pipeline is realized; when the flaw detection is carried out on the welds on the same pipeline, the trouble of repeated disassembly and assembly is omitted; the flaw detection efficiency is greatly promoted; the engineering progress is quickened; a detector is enabled to keep far away from an area to be subjected to the flaw detection in a flaw detection process; the injury of radiographic flaw detection to the detector is reduced; a strong guarantee is provided for engineering safety.

The invention relates to an oil well cement high-temperature high-pressure compressive stress strain system comprising a cement compression testing module, a power source, a pressure controlling unit, a temperature controlling unit, a signal controlling and processing unit, and pipelines. With the invention, temperature and pressure of bottom hole maintenance can be simulated. The compressive stress of oil well cement stones can be continuously measured under the temperature and pressure, and a temperature-pressure curve and a compressive stress-strain curve can be recorded. With the system and the method, anti-compression properties of different cement slurry systems can be directly measured and compared. The system and the method are beneficial for the design of cement slurry formulas. With the system and the method, cement slurry systems satisfying in-field construction requirements can be obtained.

The invention discloses a grounding sequence lock. The grounding sequence lock comprises a grounding connecting piece used for being connected with a grounding grid, wherein the grounding connecting piece is provided with a connecting piece, a grounding clamp is connected with a grounding rod through a grounding wire, the grounding rod is provided with a grounding hook, a hinge shaft is arranged on the side face of the connecting section, and a pressure control rod is hinged to the hinge shaft. A grounding control lock is arranged on the grounding connecting piece, a rotating shaft of the grounding control lock can rotated to be switched between an unlocking position and a locking position, an unlocking key can be pulled out only in the unlocking position, and the rotating shaft of the grounding control lock is connected with a grounding control hook. A spring is arranged between the pressure control rod and the grounding connecting piece, a three-phase-interlocking locking device is arranged on the grounding rod, and the interlocking key further can open or lock the three-phase-interlocking locking device. The grounding sequence lock has the advantages of being convenient to install, flexible in use and capable of controlling and guiding a grounding operator to accurately perform grounding operation, eliminates potential safety hazards, meets sequence requirements for assembling and disassembling the grounding wire through safe technical measures and meets needs for site operation.

The invention discloses an oil well cement composition and an application thereof. The oil well cement composition is prepared from the following components in parts by weight: 100 parts of G-grade oil well cement and 15-30 parts of cement kiln ash. Optionally, the oil well cement composition can further comprise 1-5 parts of a suspending agent, 5-15 parts of an early strength agent, 5-10 parts ofan ultrafine material and 1-5 parts of an expanding agent. The density of the cement paste prepared from the oil well cement composition is adjustable between 1.4 g/cm<3> and 1.6 g/cm<3>, the cementpaste formula is simple in composition, high in paste making rate, high in compressive strength and good in sedimentation stability, the field construction requirement can be met without adding floating beads and the like to reduce the material performance, the cost is low, and construction is convenient. The construction problems that in the prior art, well cementation hollow floating beads and microbead cement paste of a full-sealing section of a low-pressure leaky stratum and a low-pressure oil-gas layer are high in cost, limited in pressure bearing capacity, low in paste making rate, largein ash demand, limited in site ash storage space, incapable of achieving full sealing and the like are solved.

The invention discloses a movable shooting device for on-site pipeline flaw detection and belongs to the technical field of flaw detection.The movable shooting device comprises a supporting frame, a running mechanism and a traveling mechanism, the supporting frame is mounted on the outer surface of a to-be-detected pipeline, the running mechanism is mounted on the supporting frame, and the traveling mechanism is positioned between the running mechanism and the to-be-detected pipeline.The movable shooting device is reasonable in structural design, setting up of a detection platform special for an X-ray flaw detector can be avoided, engineering cost is reduced, and omnibearing flaw detection of pipeline welding joints is realized; when flaw detection is performed on welding joints on a same pipeline, trouble of repeated mounting and demounting is omitted, flaw detection efficiency is improved greatly, engineering process is accelerated, detection personnel can be away from a flaw detection area in the flaw detection process, damage to the detection personnel by ray flaw detection is reduced, and a powerful guarantee is provided for engineering safety.

The invention provides a side-tipping single-sleeper pulling and replacing device, which comprises a trolley frame, wherein the trolley frame is arranged above a trolley fixing mechanism, at least two trolley steel wheels are arranged under the trolley frame, at least one group of windlass and pulley mechanism is arranged under the trolley frame, a hydraulic device, an oil tank, motive power machinery, an oil cylinder and a rail sleeper clamp are arranged above the trolley frame, the oil tank provides oil materials for the motive power machinery, the oil cylinder is connected with the rail sleeper clamp and provides motive power for the rail sleeper clamp, and a rail spike sensing device is arranged under the trolley frame. The side-tipping single-sleeper pulling and replacing device has the advantages that the damage to the positioning dimension of steel rails and road beds can be avoided, the price is much lower than that of the existing sleeper replacing trolley, the side-tipping single-sleeper pulling and replacing device is also applicable to the replacement of sporadically damaged sleepers, the work intensity of workers is reduced, the service life is long, the maintenance is convenient, more precious time is won for the railway maintenance, and great significance is realized on the independent innovation of road maintenance machinery and the internationalization of domestic road maintenance machinery.

The invention discloses a pressure-adjustable grouting system and grouting method based on a special grouting moving cavity, and relates to the technical field of grouting. The grouting system comprises a main grouting pipe and a plurality of grouting valve pipes connected to the main grouting pipe, wherein each grouting valve pipe is located in an annular space in the wall of a drill hole, each grouting valve pipe comprises a grouting valve pipe body, and a guniting valve port is formed in each grouting valve pipe body; and a grouting pipe, an air injection pipe and a movable piston are arranged in each grouting valve pipe body, the air injection pipes are connected with the movable pistons, air pressure is applied into the movable pistons through the air injection pipes, the movable pistons generate volume expansion after the air pressure is applied, therefore closed cavities are formed between the lower portions of the movable pistons and the grouting valve pipe bodies, and groutingis conducted in the grouting valve pipe bodies according to the positions of the movable pistons. According to the grouting system, pressure adjustment can be conducted on a single grouting valve pipe, so that special grouting is conducted on different target layers, and the on-site construction efficiency can be improved.

The invention discloses a goods shelf type pier body outer scaffold and belongs to the technical field of scaffolds. The problem that in the prior art, a pier body formwork is complex in erecting working procedure and poor in safety is solved. The goods shelf type pier body outer scaffold comprises a plurality of vertical columns, a plurality of cross beams with the inner sides being provides with grooves, a plurality of scaffold boards, a plurality of protective fences, a plurality of crawling ladders and a plurality of cable-stayed steel wire ropes. The two ends of the cross beams are connected with the adjacent vertical columns correspondingly; the scaffold boards are embedded into the grooves in the inner sides of the cross beams; the left sides and the right sides of the protective fences are connected with the vertical columns correspondingly; the two ends of the crawling ladders are connected with the scaffold board vertically adjacent to one another correspondingly; and the two ends of the cable-stayed steel wire ropes are connected with the vertical columns through buckles and arranged on the outer sides of the protective fences. The goods shelf type pier body outer scaffold is assembled to be a whole, good in stability and designed modularly, and the labor cost is saved greatly at the time of constructing and detaching.

The invention relates to the technical field of building construction, in particular to high-dispersion steel fiber reinforced concrete and a construction technology thereof. The high-dispersion steel fiber reinforced concrete comprises, by weight, 276-390 parts of cement, 163-180 parts of water, 720-739 parts of sand, 974-1035 parts of gravel, 49-85 parts of coal dust, 49-64 parts of mineral powder, 4.25-7.00 parts of water reducing agent and 50-78.5 parts of steel fibers. During production, mixing uniformity and consistency in color of a steel fiber reinforced concrete mixture can be guaranteed, segregation and bleeding and steel fiber agglomeration can be avoided, and accordingly the performance of the high-dispersion steel fiber reinforced concrete can meet on-site construction requirements.

The invention provides a preparation method of a lifted cutting agent. The preparation method comprises the following steps: a styrene vinyl carboxylic acid copolymer, diamine and hydroxyl aliphatic acid are subjected to a reaction to obtain the lifted cutting agent. The lifted cutting agent takes the styrene vinyl carboxylic acid copolymer, diamine and hydroxyl aliphatic acid as raw materials, the lifted cutting agent has an alternative structure, can increase the structural force of drilling fluid, and has higher lifted cutting rate, the oil-based drilling fluid using the lifted cutting agent has high lifted cutting force and strong dynamic carrying and static suspension capability, and requirement of on-site construction can be better satisfied. The lifted cutting agent prepared by theabove technical scheme has a structure shown in a formula I. The invention also provides the oil-based drilling fluid of the lifted cutting agent.

The invention discloses a bricking device and method. The device comprises a lifting device, an aluminum alloy material shell, a belt conveyor, a push rod device and a slide way device, the lifting device is mounted in the aluminum alloy material shell, the slideway device is installed on the rear side of the lifting device, the push rod device is arranged on a steel platform I of the lifting device and is in sliding connection with the slideway device, the belt conveyor is arranged behind the lifting device, and a conveying belt on the belt conveyor extends into the lifting device from the upper portion of the slideway device and is in butt joint with a steel platform II of the lifting device. Compared with the prior art, the bricklaying device has the beneficial effects that 1) hollow bricks can be accurately transported to a designated mounting position to meet the requirements of site construction, 2) the bricklaying device is simple in structure and convenient to operate, and 3) mechanical operation is realized, so that labor is saved, and the construction cost is reduced.