563results about "Cleaning apparatus" patented technology

Systems and methods presented herein facilitate coiled tubing operations, and generally relate to generating a depth of solids origin (DSO) guess that represents a depth location of solids in a wellbore traversing a hydrocarbon-bearing formation, using a calibrated flow model (FM) to predict an amount of solids at a surface location of the wellbore based at least in part on the DSO guess, comparing the predicted amount of the solids at the surface location of the wellbore to a measured amount of solids at the surface location of the wellbore, determining that the DSO guess is equal to an actual DSO within the wellbore when the predicted amount of the solids at the surface location of the wellbore matches the measured amount of solids at the surface location of the wellbore, and adjusting one or more operational parameters of a coiled tubing system to reduce an amount of the solids at the DSO within the wellbore.

The invention belongs to the technical field of oil and gas well gas production engineering, and particularly relates to a sand prevention gas lift device. The sand prevention gas lift device comprises an eccentric cylinder; the gas lift valve is arranged on the outer side of the eccentric cylinder; the filter mechanism is arranged on the outer side of the eccentric cylinder and connected with the gas lift valve, and fluid outside the eccentric cylinder sequentially passes through the filter mechanism and the gas lift valve to enter the eccentric cylinder.

The invention discloses automatic cleaning equipment for geothermal well maintenance, and relates to the technical field of geothermal well cleaning equipment.The automatic cleaning equipment comprises a pipeline adaptive cleaning assembly, the pipeline adaptive cleaning assembly extends into a geothermal well and can clean the inner walls of pipelines with different sizes of the geothermal well, and the top of the pipeline adaptive cleaning assembly is connected with a magnetic connecting structure; under the cooperation of the pipeline adaptive cleaning assembly, the shaft joint mechanical arm and the magnetic connecting structure, the whole device can accurately adapt to vertical, bent and variable-diameter pipelines through the cooperation of laser ranging and a lead screw sliding block adjusting structure and the cooperation of a self-driving wheel and a transmission rod structure, the problems of pipe clamping and blind areas of traditional equipment are solved, and the working efficiency is improved. And by means of the arrangement that the focus of ultrasonic waves coincides with the center of high-pressure water flow, the composite effect that cavitation bubble impact is matched with mechanical water flow cleaning is formed, the hard scale removing efficiency is effectively improved, and under the cooperation of the variable-angle inclined spray head and the adjustable spray hole structure, the circumferential direction can be covered, and different scales can be accurately hit.

The invention relates to the technical field of ground source heat pump drilling, in particular to ground source heat pump drilling auxiliary equipment which comprises a rigid supporting unit, an elastic supporting unit, a conversion unit and an adjusting unit. Through cooperative cooperation of the rigid supporting unit, the elastic supporting unit, the conversion unit and the adjusting unit, self-adaptive switching of the working state and the contact area under the borehole diameter change is achieved, the inner sleeve and the outer sleeve rotate relatively in the wide-diameter section, the main supporting piece and the auxiliary supporting piece make contact with the borehole wall together to form stable supporting, diameter expansion caused by excessive scraping and loosening of the stratum is effectively avoided, and the working efficiency is improved. Meanwhile, the friction resistance with the well wall is reduced; in the narrow-diameter section, the inner sleeve and the outer sleeve are switched to be in a synchronous rotating state through the switching unit, the adjusting unit drives the auxiliary supporting piece to retract, only the main supporting piece makes contact with the well wall independently and rotates to scrape the wall, the friction resistance is greatly reduced, meanwhile, mud cakes are efficiently removed, and the clamping stagnation hidden danger is eliminated.

This technology relates to a system and method of delaying CaCO3 scale formation in an oil production well using a phosphonate scale inhibitor and a chelating agent. The addition of a small concentration (less than 5 ppm) of a chelating agent to the phosphonate scale inhibitor delays the scale induction time and scaling time of CaCO3 scale.

The utility model provides a variable-diameter drill bit for a water injection well, which relates to the technical field of well drilling devices and comprises a body, the body is of a hollow structure, one end of the body is provided with an assembling part, and the other end of the body is provided with a fixed drill bit; the scraping blades are evenly arranged on the body, assembling grooves matched with the scraping blades are evenly formed in the outer side of the body, and the scraping blades slide in the corresponding assembling grooves in the radial direction of the body. According to the drill bit, the at least two assembling grooves matched with the scraping blades are evenly formed in the outer side of the body, the scraping blades slide in the corresponding assembling grooves in the radial direction of the body, the assembling grooves enable the scraping blades to be kept balanced in the sliding process, the diameter changing stability of the drill bit is guaranteed, and the diameter changing effect on the drill bit is achieved.

A device for reducing viscosity and dissolving incrustations in pipelines comprising a central tube comprising two ends and one or more external threads at the two ends for coupling, a conical reduction, a protective jacket, and one or more spacer rings. The central tube is fixed to an orifice of the conical reduction by one or more weld fillits. The conical reduction comprising one or more permanent magnet collars and are internal to the protective jacket, the protective jacket is fixed to the conical reduction via a hole fully penetrating the one or more weld fillits. The one or more spacer rings, without a megnetic field dress the central tube, positioned juxtaposed to the one or more permanent magnet collars so that the ends of the one or more spacer rings are fixed to the central tube to preserve the location of the one or more spacer rings.

The invention relates to the technical field of oilfield chemistry, in particular to a nano-composite viscosity reducer, a preparation method, application and a high-viscosity thick oil viscosity reduction method. According to the preparation method, the nano composite viscosity reducer is prepared from a surface-modified nano oxide and an amphiphilic polymer through a solvent exchange method; the nano oxide is nano silicon dioxide nano particles, zinc oxide nano particles or ferric oxide nano particles, and the amphiphilic polymer is a partial esterification product of a styrene-maleic anhydride copolymer or an octadecyl acrylate-methacrylic acid copolymer. According to the preparation method, the viscosity reducer not only can efficiently disassemble a colloid asphaltene network structure, but also has a certain catalytic modification function, does not influence subsequent treatment of crude oil, and has the advantages of high viscosity reduction efficiency, lasting effect, no formation of stable emulsion, shear resistance, good temperature resistance, strong universality and the like.

The invention relates to the field of well drilling, in particular to a cleaning method and cleaning slurry.The cleaning method comprises the steps that cleaning slurries with different viscosities are pumped in through a slurry pump to conduct circulating cleaning on a borehole, and the cleaning process of each circulating period sequentially comprises the three stages of thick slurry cleaning, thin slurry cleaning and thick slurry cleaning, the thick slurry is clean slurry with the Markov funnel viscosity of 300-800, and the thin slurry is clean slurry with the Markov funnel viscosity of 80-200 s. The cleaning slurry takes well slurry as base slurry and comprises sulfonated lignite, polypropylene fibers, high-softening-point emulsified asphalt, 800-mesh superfine calcium, 1200-mesh superfine calcium, polyanionic cellulose and 2500-mesh superfine calcium. The process is simple, the flushing and carrying effects on rock debris and falling blocks of different sizes are good, and the consumption of cleaning liquid is small.

The invention belongs to the technical field of oil exploitation, and particularly discloses a natural vibration pulse well washing tool which comprises a tool body, a connecting column is coaxially connected to one side of the tool body, the two ends of the connecting column are communicated with each other, a plurality of supporting ribs distributed in the circumferential direction are connected between the tool body and the connecting column, and jet flow channels are formed between the adjacent supporting ribs; the tool body internally comprises a connecting cavity, a throttling runner and a natural vibration cavitation cavity which are coaxially communicated in sequence, and the sectional area of the throttling runner is gradually reduced in the direction from the connecting cavity to the natural vibration cavitation cavity; a natural vibration pulse jet flow generation block is arranged in the natural vibration cavitation cavity, and a jet flow nozzle communicating with the natural vibration cavitation cavity and the jet flow channel is formed in one side of the natural vibration cavitation cavity. After flowing through the connecting cavity, the throttling runner and the natural vibration cavitation cavity in sequence, fluid is jetted out through the jet flow nozzle and jetted out from the jet flow channel to clean a shaft. The cleaning efficiency can be improved, and the shaft can be effectively cleaned.

This utility model belongs to the technical field of oil drilling and production equipment, specifically relating to a tubing scraping device. The device includes an upper connector and a scraping head, as well as a rotating mechanism connecting the upper connector and the scraping head. The rotating mechanism includes a support sleeve connected to the upper connector and a rotating body with one end anti-detached from the support sleeve and the other end connected to the scraping head. Track grooves are evenly distributed on the outer wall of the rotating body. A guide pin is provided at the end of the support sleeve away from the upper connector. The track grooves and guide pin are slidably engaged to allow the rotating body to rotate and axially displace relative to the support sleeve when the tubing scraping device is lifted or lowered. In use, by lifting or lowering the device, the track grooves of the rotating body slidably engage with the guide pin of the support sleeve. The guide pin slides along the track grooves, forcing the rotating body to rotate and generate axial displacement, thereby driving the scraping head to actively rotate and move axially. Compared with the prior art, which passively drives the scraping head through scraper friction, this effectively improves scraping quality and efficiency.

The application discloses a non-oxidative weak-acid polyacrylamide degrading agent and a preparation and use method thereof, and the degrading agent comprises the following components: a reducing agent, a regulator, a mutual solvent and water; the reducing agent is one of 3-O-ethyl ascorbic acid ether and L-ascorbic acid-2,6-dibutyrate; the regulator is ammonium chloride; and the mutual solvent is one of ethylene glycol monobutyl ether and isopropyl alcohol. The problems that the existing degrading agent needs to be isolated by a plug for redox reaction with subsequent injected mud acid or secondary precipitation is caused by metal ions such as Na + , K + , Fe 2+ and the like in the degrading agent and subsequent injected mud acid are effectively solved.

The invention relates to the technical field of oil well paraffin removal, in particular to an electric submersible screw pump well anti-paraffin-deposition chemical injection and thermal washing integrated device. Comprising a pesticide injection barrel, a high-pressure plunger pump, a three-way valve and a connecting pipe, the connecting pipe is fixedly connected and communicated with a plurality of butt-joint pipes, annular injection assemblies with the same number as the butt-joint pipes are arranged outside an oil pipe, and the butt-joint pipes are communicated with the corresponding annular injection assemblies respectively. A paraffin remover and hot water are injected at fixed points at different depths of an oil pipe through a plurality of butt joint pipes, so that a paraffin removal medium completely bypasses the electric submersible screw pump, chemical swelling and high-temperature thermal damage of the agent to stator rubber are avoided fundamentally, the service life of the pump is remarkably prolonged, meanwhile, the paraffin remover and the hot water are continuously supplemented at different depths, and the service life of the pump is prolonged. The concentration of the paraffin remover is kept stable, the temperature of hot water is kept, the dissolving strength of the paraffin remover on a paraffin precipitation layer and the melting effect of the hot water on wax are ensured, and the paraffin removal thoroughness and the operation efficiency are greatly improved.

A wellbore cleaning tool includes an elongate body having at least one groove positioned along the body, one or more tool connectors coupled to the groove of the body, and one or more engagement tools coupled to the body through the tool connector, whereby an annular gap is formed between the tool body and the one or more engagement tools. The one or more engagement tools are configured to engage with an inner surface of a pipe.

The present invention addresses to a method of removing scale from the DHSV of the oil production string aiming at maintaining the production of the wells and thus avoiding the loss of production. First, a neutralizing solution is placed in the service line, before pumping the scale removing solution through the string to act on the DHSV. Next, the acid is pumped into the production string to react with the calcium carbonate scale. After the time for the dissolution of the scale inside the DHSV, the well is opened for production by the service line. The spent acid is mixed with the neutralizing solution inside the service line, reducing its corrosiveness in relation to the service line, contributing to its preservation.

A method includes disposing a device into a borehole in proximity to a subterranean formation where a filter cake has been formed adjacent thereto, the device comprising a support structure and a shap

The utility model discloses a water soluble paraffin removal ball, which relates to the technical field of paraffin removal balls and comprises a paraffin removal ball body, a cleaning agent storage component is mounted in the paraffin removal ball body and comprises a storage tank, a through hole, a chemical cleaning agent and a water soluble plastic film, the paraffin removal ball comprises a paraffin removal ball body, a storage groove is formed in the paraffin removal ball body, the storage groove is filled with a chemical cleaning agent, a plurality of through holes are formed in the outer side of the paraffin removal ball body and penetrate through the inner wall of the storage groove, and a water-soluble plastic film is installed on the inner side of one end of each through hole. The synthetic material of the paraffin removal ball body is ethylene vinyl acetate, and the paraffin removal ball body can be dissolved in a crude oil environment, so that the paraffin removal ball body can be automatically dissolved in an oil pipe after being used for 24 hours, the oil pipe is prevented from being blocked, the paraffin removal ball does not need to be found, and the paraffin removal ball is more convenient to use.

Treatment fluids and methods for dissolving titanium-iron oxides and iron oxides in a wellbore. A treatment fluid includes an activator selected from the group consisting of chlorophyll, pheophytin, hydroxylammonium chloride, dopamine, crown ethers, cryptands, ethanoloamine, trihydroxamate-containing siderophores, salts thereof, and any combination thereof, an acid and / or acid-generating agent, and an aqueous base fluid. The treatment fluid contacts a titanium-iron oxide and / or iron oxide to dissolve the titanium-iron oxide and / or iron oxide.

The utility model provides an oil exploitation pipe inner surface treatment device, which comprises a main seat body, the top side of the main seat body is rotatably connected with a connecting cylinder, the outer side of the connecting cylinder is fixedly provided with a protective shell, and the top side of the protective shell is fixedly provided with a connecting seat which can be connected with a driving device; a plurality of sets of fixing bases are symmetrically and fixedly installed on the bottom side of the main base body, first sliding rods are slidably connected to the inner sides of the multiple sets of fixing bases, and one ends of the first sliding rods penetrate out of the fixing bases and are fixedly connected with steel brushes. Through cooperation of the driving motor, the first gear and the second gear, the main base body can be driven to rotate flexibly, through cooperation of the main base body, the fixing base, the first sliding rod and the steel brushes, the multiple sets of steel brushes can be driven to rotate flexibly, the inner wall of a pipe can be brushed, sediments such as paraffin attached to the inner wall can be effectively removed, and the service life of the pipe is prolonged. And the cleaning efficiency of the product is improved.

A method of monitoring deposits on a well by cleaning a well of existing deposits sufficiently to allow a plunger from an instrumented plunger lift to travel therethrough; monitoring any further addition of deposits using the same instrumented plunger lift that records a velocity and a position of the plunger (or any other parameters that allows one to estimate speed and depth) as it travels through the well; and using the recorded velocity and position to determine a size and a position of each added deposit by a decrease in the velocity at a given position as compared to a baseline velocity. Ideally, once added deposits begin to impinge on production rates, the operator then treats said well to remove each said added deposit. The technology may thus be used to identify potential deposits, but also use to validate the efficacy of chemical treatments used in said well.

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 application belongs to the technical field of oil wellbore cleaning, and discloses a wellbore cleaning device, which comprises a bearing pipe, an ultrasonic unit, a positioning piece and a fixing piece. The ultrasonic unit is in an annular structure and is provided with a plurality of ultrasonic units. The plurality of ultrasonic units are arranged in parallel and at intervals, and are sleeved on the bearing pipe. The ultrasonic unit is configured to emit ultrasonic vibration in the circumferential direction of the bearing pipe. The positioning piece is sleeved on the bearing pipe, and one positioning piece is arranged between adjacent ultrasonic units. The diameter of the positioning piece is greater than the diameter of the ultrasonic unit. The fixing piece comprises a first fixing piece and a second fixing piece. The first fixing piece is installed at one end of the bearing pipe, and the second fixing piece is installed at the other end of the bearing pipe. Through the above arrangement, the annular ultrasonic unit can emit ultrasonic waves with super large power, can strip fine particles attached to the inner wall of the wellbore, and can clean the residual bound oil in the wellbore, so as to improve the cleaning effect of the wellbore.

The invention relates to a process for removing an obstruction (13) caused by gas hydrates or water ice from the tubing (12) of a hydrocarbon production or injection well or a riser. The process comprises passing a microwave generating and emitting tool (5) on wireline (8) down the tubing (12) and supplying electrical power to the tool via the wireline (8) or from a battery to produce microwave energy and direct it to the gas hydrate and / or water ice deposit (13), thereby melting deposit and unblocking the well.

The utility model relates to the technical field of cast-in-situ bored pile construction, and particularly discloses a cast-in-situ bored pile desilting device which comprises a collecting barrel, a desilting device and a desilting device. A lower drum; a bottom desilting mechanism; a collecting mechanism; and a top dredging mechanism. The lower rotary drum is located at the bottom of a pile hole through extension of the telescopic arm, then a dredging pump outside the pile hole is started, water is injected into the lower rotary drum through a connecting pipe and a guide pipe, and the water enters the bottom of the pile hole from a discharging hole, so that sludge or sediment originally located at the bottom of the pile hole upflows upwards; sludge or sediment is guided into the collecting cylinder through the collecting mechanism, in this way, most of the sludge or sediment at the bottom of the pile hole can be cleaned away, then the telescopic arm is matched to enable the top dredging mechanism to move upwards and conduct dredging on the inner wall of the pile hole at the same time, and therefore dredging on the bottom and the inner wall of the pile hole can be achieved at the same time, and then the dredging efficiency is improved; and the construction progress is accelerated.

The invention discloses a method for establishing initial conditions of a gas reservoir through uniform initialization of a heterogeneous large rock plate model, and belongs to the technical field of gas reservoir development. On the basis that a conventional rock plate is provided with injection and production well inlets and outlets, the two sieve pipe injection channels are additionally arranged, the two ends of the sieve pipe are connected through the pipeline, and fluid can be injected into the sieve pipe; plugging or heating plugging removal operation is achieved by injecting a plugging agent into the four pipelines in good time, namely, an injection well and a production well are plugged firstly, formation water is injected through a screen pipe to make a rock plate saturated, and then formation water in the rock plate is displaced through gas injection of the screen pipe; the screen pipe is plugged, and a plugging removal injection and production well preparation experiment is carried out; the rock plate reaches an initial state of a gas drive / depletion experiment; the problem that the screen pipe becomes a high-permeability channel to affect a gas drive experiment and cause distortion of gas drive experiment data is avoided, the accuracy of a large flat plate model longitudinal heterogeneous gas reservoir water invasion failure or constant volume failure evaluation experiment can be improved, and the method has important significance on compact reservoir transformation and effective development.

The invention belongs to the technical field of wellhead dosing, and discloses a gas production wellhead dosing device and a treatment method.The device comprises a material tank, a supporting column is arranged at the bottom of the material tank, a power piece is arranged at the top of the material tank, the supporting column and the power piece are both fixedly connected with the material tank, and a feeding groove communicated with the material tank is formed in the top end of the side wall of the material tank; the bottom end of the side wall of the charging bucket is provided with a discharging pipe which is communicated with the charging bucket and is provided with a valve; a hollowed-out partition plate is arranged in the material tank, an upper stirring mechanism is arranged at one end of the partition plate, a lower stirring mechanism is arranged at the other end of the partition plate, and the material tank is divided into an upper layer and a lower layer through the upper stirring mechanism and the lower stirring mechanism, so that synchronous stirring is conducted, it is guaranteed that all-directional mixing and stirring are conducted on the material tank, and full mixing of chemicals and materials is guaranteed on the whole; the power piece provides power for the upper stirring mechanism and the lower stirring mechanism at the same time, two-dimensional stirring turbulent flow is generated, and the stirring effect is further enhanced.

A bottom hole assembly (BHA) deployable in a production tubing includes a foam assembly and a swab assembly. The foam assembly includes a check valve unit coupled to a chemical canister. The swab assembly is coupled to the foam assembly. The swab assembly includes a swab mandrel and a plurality of swab cups. A method for initiating natural flow in a well includes conveying a bottom hole assembly (BHA) on a slickline to a first depth into a production tubing, holding the BHA stationary in the static fluid, releasing a foaming chemical from the chemical canister to the production tubing via the check valve unit, activating the foaming chemical to form a foam, opening a well flowline, and swabbing at least a portion of the production tubing with the swabbing assembly of the BHA by at least partially removing the BHA from the production tubing.

The invention provides a pipeline desilting and descaling method. The method comprises the following steps that a pipeline scale shielding device is placed in a scaling section in a pipeline to be treated; high-pressure cleaning liquid is provided for the pipeline scale shielding device through a high-pressure liquid supply assembly so as to drive working parts of the pipeline scale shielding device to rotate and carry out scale cleaning operation; according to the method, the core problems that circulation is blocked, efficiency is reduced and the like due to scaling of the pipeline are effectively solved, and substantial progress is made in the aspects of operation automation, environment friendliness and multi-scene adaptability.

The invention discloses an underground intubation type long-acting separation and production combination tool, and relates to the technical field of long-acting obstructors, the underground intubation type long-acting separation and production combination tool comprises a central tube, fixing blocks are fixed on the outer side of the upper end of the central tube at equal angles, the fixing blocks and a connector are mutually fixed, and the inner side of the connector is slidably connected with a sealing mechanism used for sealing a production tube. According to the underground intubation type long-acting separation and production combined tool, the cleaning mechanism is adopted, and axial gravity is converted into rotation torque through the spirally-distributed rollers, so that when the tool is put down, the cambered surface plate is tightly attached to the pipe wall under the thrust of the air bag; the friction force between the spiral rolling wheel (30-60-degree lead angle) and the pipe wall generates tangential component force enabling the whole rotating assembly (the circular ring, the cambered surface plate and the scraping plate) to rotate around the central pipe, the scraping plate rotates along with the tangential component force, attachments in the circumferential direction are scraped away, the process penetrates through the whole tripping-in stroke, the pre-treatment effect on the well wall of the sealing section is achieved, and the service life of the sealing section is prolonged. And the contact quality and the service life of the follow-up sealing rubber cylinder and the metal slip are obviously improved and prolonged.

The present invention proposes the use of microcapsules containing acids in its interior to adjust the pH of the scale inhibitor in oil reservoirs. The microcapsules are comprised of an inner moiety with organic or inorganic acid and an outer moiety comprised of an oil-soluble polymeric material at the reservoir temperature. The microcapsules open due to the effect of the reservoir temperature, releasing the acid into the corrosion inhibitor, hence changing its pH. The present invention further proposes a method of treatment using scale inhibitors using microcapsules containing acids in its interior to adjust the pH of the scale inhibitor in oil reservoirs, wherein the method comprises the steps of (a) preparing the scale inhibitor product; (b) pumping the inhibitor solution prepared into the standpipe manifold; (c) adding the acidic microcapsules to the scale inhibitor; and (d) injecting the inhibitor solution mixture containing the acidic microcapsules into the production well column.