11 results about "Mud systems" patented technology

The invention discloses a lubricant for drilling fluid and a preparation method of the lubricant, and belongs to the field of oil and gas drilling chemical additives. In the water-based drilling fluid, microbubbles I with the diameter of 0.1-1 mu m and microbubbles II with the diameter of 1-10 mu m are prepared in situ, and a low-frequency sound field of 20-50 kHz and a high-frequency sound field of 200-500 kHz are adopted for alternate or superposed driving; the microbubbles I are rapidly broken to release the lubricant to achieve instantaneous efficient lubrication of the initial drilling section, and the microbubbles II are slowly broken to maintain the lubricating film to achieve lasting lubrication of the rear section. The preparation method comprises the following steps: mixing the base oil, the surfactant, the gas precursor and the foam adjusting aid in proportion, performing synchronous gas injection oscillation in a multi-frequency sound field to form a graded microbubble suspension, and performing settling separation and stabilizing treatment to obtain the product. The lubricant can obviously reduce the friction between a drilling tool and a well wall and prolong the service life of the drilling tool, is compatible with an existing slurry system, is free of waste water and waste gas emission in production, does not detect heavy metals after being used, is easy to degrade in surfactant and pollution-free to underground water, meets the requirement of green drilling, and has excellent engineering popularization value.

This invention relates to the field of geotechnical drilling engineering technology, and discloses a method for drilling small-diameter deep wells, comprising the following steps: using a positive circulation drilling rig to prepare a mud system based on the laterite soil of the construction site; using a composite reinforced roller cone bit for drilling operations in pebble layers; using a semi-automatic pulley system to connect or disconnect drill rods; using a positive circulation drilling rig to perform a segmented lifting and scraping wall composite process for drilling, in which a hole guide tool is used for scraping the wall; determining the depth of the aquifer before lowering the well casing; completing the butt joint connection of the well casing by welding, and completing the lowering and installation of the well casing; after the well casing is installed, sequentially performing mud replacement, air compressor agitation and well washing, and simultaneously completing the symmetrical backfilling of filter material; conducting a pumping test to complete the well completion quality acceptance. This invention can significantly improve drilling efficiency, well completion quality, and construction safety in complex pebble formations, while effectively reducing construction costs.

The invention discloses a marine high-pressure slurry pump load test method and test device, and belongs to the technical field of ships. A high-pressure mud system, a mud pit and a main pipeline are arranged on the ship, the high-pressure mud system comprises a high-pressure mud pump, a first pipeline and a second pipeline, and the first pipeline is connected with the mud pit; a throttling blind plug with a throttling hole is arranged, flow and pressure parameters during operation of the high-pressure slurry pump are inquired, and accordingly the throttling blind plug of the throttling hole with the corresponding hole diameter size is designed or selected; the marine high-pressure slurry pump load test method comprises the steps that a second pipeline is connected with a main pipeline, the main pipeline extends to a ship outer plate, and a blind plate is installed on the main pipeline; a throttling blind plug is mounted on the blind plate, and the second pipeline is communicated with the main pipeline and is communicated with the outside through a throttling hole; seawater is supplied into the mud pool and the high-pressure mud pump, the high-pressure mud pump operates and tests, the seawater is discharged to the sea surface through the throttling hole, the test method is simplified, and the purposes of high efficiency and low cost are achieved.

This invention specifically discloses an environmentally friendly recyclable drilling mud for municipal directional drilling, its preparation process, and its application. The mud is composed of water, bio-enzyme-activated modified bentonite, polyaspartic acid derivatives, industrial solid waste fillers, plant extracts, a compound corrosion inhibitor, and functional regulators in specific mass percentages. Its preparation process includes pretreatment, base mud preparation, functional addition, and adjustment optimization steps; the application process covers construction grouting, slag removal, recycling, and final biodegradation treatment. This invention, through the synergistic utilization of environmentally friendly and biodegradable core components and industrial solid waste, endows the mud with excellent biodegradability. Waste mud can be discharged or reused after simple treatment. This mud system has stable performance and can be recycled more than 5 times. It has significant wall protection and anti-collapse effects in complex strata such as silty clay and sand layers, effectively controlling surface subsidence while significantly reducing water consumption, raw material costs, and waste disposal costs, achieving green, low-carbon, economical, safe, and efficient municipal directional drilling.

The application relates to the technical field of engineering machinery, and aims to provide an intelligent linkage control device for a rotary drilling rig-mud system based on the Internet of Things, so as to solve the problem that an existing drilling rig control system and a mud pump station system independently operate and cannot be controlled in real time. The technical scheme can be summarized as follows: a sensing and monitoring module is used to collect drilling rig working condition parameters, pile casing parameters and mud state parameters; an edge computing module is used to calculate a pressure imbalance index in real time according to a coupling model among the drilling rig working condition, the mud performance in the pile casing and the pile casing water head difference, and the linkage control module is informed when the pressure imbalance index exceeds a corresponding preset threshold value; and a linkage control module is used to output corresponding control instructions to automatically adjust the pump speed and / or the feeding amount of a mud supply pump in the mud station and / or the drilling rig footage speed, so as to realize linkage control. The application avoids the problem that the drilling rig control system and the mud pump station system independently operate, and is suitable for long pile casing drilling construction.

The invention relates to an environment-friendly ultra-deep soft soil layer cast-in-place pile construction method and an energy recovery device. The environment-friendly ultra-deep soft soil layer cast-in-place pile construction device comprises a double-layer pile casing, a drilling machine, a slurry system and the energy recovery device. The construction method comprises the construction steps of site preparation and lofting, pile casing burying, drilling machine in-place and drilling bucket installation, pore-forming drilling and grouting wall protection, closed-circuit slurry purification and reinjection, hole cleaning detection, reinforcement cage lowering and positioning, guide pipe pouring and pile casing recycling. According to the method, drilling machine hydraulic system braking energy and motor braking energy are recovered in real time through an energy recovery device, energy recovery and supply are dynamically adjusted through a self-adaptive distribution algorithm based on real-time working condition data of a monitoring system, and energy saving and consumption reduction are achieved. The system has the advantages of remarkable energy conservation, high pile forming quality, high adaptability, high intelligent degree and the like, and is suitable for pile foundation construction of ultra-deep soft soil layers.

The invention discloses a natural gas maturity continuous detection method based on drilling rock debris tank head gas, and belongs to the field of deep sea oil-gas exploration, and the natural gas maturity continuous detection method comprises the following steps: S1, rock debris sample treatment; s2, collecting a sample; s3, storing and transporting the sample; s4, heating in a water bath; s5, testing and analyzing; and S6, data processing: fitting mudstone section light hydrocarbon maturity parameters and mud gas methane carbon isotope or kerogen vitrinite reflectivity, establishing a rock debris tank top gas light hydrocarbon maturity model, and estimating the maturity of natural gas / kerogen around an exploratory well. By optimizing the sample treatment and analysis process, continuous and low-cost detection of the natural gas maturity under the oil-based mud system is realized, and an efficient technical means is provided for deep sea oil-gas exploration. The method is verified in the practical application of the B52 well of the dolomitic sag in the Pearl Jiangkou basin, and the exploration precision requirement is met.

According to the slurry shield deslagging amount estimation method and system based on the storage pool liquid level, continuous and automatic estimation of the deslagging amount is achieved based on solid-liquid volume conservation by fusing multi-source data such as the storage pool system liquid level change, the water supplementing amount, the filter pressing waste slurry amount and the laser scanning muck volume in real time. The method effectively overcomes the defects that traditional manual statistics is low in efficiency, large in error and incomprehensive in estimation depending on a single main parameter, and the real-time performance and accuracy of slag tapping quantity monitoring are remarkably improved. According to the invention, real-time and reliable data feedback can be provided for constructors, so that the stratum change of a tunneling face and the working state of a slurry system can be mastered more accurately, optimization and adjustment of tunneling parameters are supported, construction risks such as over-excavation, under-excavation and gushing can be prevented, and finally, safety, efficiency and controllability of shield construction are guaranteed; and slurry shield construction is promoted to develop towards digitization and intelligentization directions.

This invention discloses a visual experimental apparatus and method for simulating and sealing leakage from fractures with both overflow and leakage. The apparatus includes a wellbore simulation device, a sealing mud system, a rough fracture plate, a monitoring system, and a gas intrusion system. The wellbore simulation device is connected to both the sealing mud system and the rough fracture plate. The monitoring system is used to observe images of the rough fracture plate and the pressure values ​​of the wellbore simulation device, the sealing mud system, and the gas intrusion system. The sealing mud system injects sealing mud into the rough fracture plate through an internal gas source device. The gas intrusion system inputs gas into the rough fracture plate through a gas cylinder. The monitoring system is used to observe and record the fluid flow and particle bridging behavior within the rough fracture plate and to detect the internal pressure of the wellbore simulation device during the experiment. This invention solves the technical problems of complex experimental procedures, poor operability, and low simulation level in existing technologies by providing a visual experimental apparatus and method for simulating and sealing leakage from fractures with both overflow and leakage.

The utility model discloses a mud tank and a subsea valve switch indicating device thereof, and relates to the technical field of well drilling, and the subsea valve switch indicating device comprises a mounting substrate arranged on the upper tank surface of a mud tank body; one end of the indicating plate is rotationally mounted on the mounting substrate; at least two driving parts are arranged on the periphery of the rotating sleeve, the top surface of the rotating sleeve is lower than the bottom surface of the mounting base plate, when the subsea valve control lead screw rotates, the rotating sleeve drives the driving parts to rotate, and the driving parts drive the indicating plate to turn over relative to the mounting base plate; the opening and closing state of the sea valve is determined according to the overturning direction of the indicator board. Therefore, it is guaranteed that the sea valve control lead screw is not exposed out of the upper layer tank face of the mud tank body in the non-adjusting state, the injury risk of workers is reduced, the opening and closing state of the sea valve can be rapidly and accurately judged through the indicator board, the operation efficiency of a mud system is improved, and operation errors caused by misjudgment of the opening and closing state of the sea valve can be effectively avoided.

The application provides a shale oil geochemical index evaluation method, and relates to the field of oil and gas exploration, and comprises the following steps: establishing a mathematical model of geochemical indexes under an oil-based mud system; measuring the organic carbon TOC content under a water-based mud system and the organic carbon TOC content under the oil-based mud system of multiple same depths of the same reference well; establishing a linear regression equation of the geochemical indexes under the oil-based mud system according to the mathematical model of the geochemical indexes and the measurement results; determining the organic carbon TOC content under the water-based mud system of a to-be-predicted area based on the linear regression equation; and evaluating the geochemical indexes of the to-be-predicted area according to the organic carbon TOC content under the water-based mud system of the to-be-predicted area. The evaluation method only needs to measure the organic carbon TOC content under the oil-based mud system of the same well, and uses the organic carbon TOC content under the water-based mud system to evaluate the geochemical parameters according to the regression equation, thereby improving the accuracy of the evaluation of the geochemical indexes.