134results about How to "Increase drainage area" patented technology

The invention relates to an oil field production technique, in particular to a fracturing method applied under the oil well to improve new well production capacity of low permeability reservoir before being brought into production. The fracturing reformation course at least comprises common fracturing technique and is characterized in that the method uses a compound application of more than two techniques of the use of acid fracturing liquid, or diversion agent or acid liquid and diversion agent by adopting high-energy gas fracturing technique; the upper sealed fracturing pipe is adopted during the working of hydraulic fracturing; the acid liquid is adopted during a pad fluid stage as the working liquid; the diversion agent is added for one or more times to seal fractured cracks; an increasing working flow rate is adopted before and after the adding of the diversion agent. The method of the invention can increase oil discharging area after fracturing, reduce expansion rate of clay minerals in fractured reservoir and improve completion of oil well reformation, fracturing effect and production capacity of low permeability reservoir after fracturing.

The invention particularly provides a temporary blocking turnaround fracturing method based on surface modified polyvinyl alcohol fibers. The method comprises the following steps that 1, the surfaces of the water-soluble poly(vinyl alcohol) fibers are modified; 2, fracturing work liquid is prepared; 3, liquid in a shaft is extruded out by and replaced with active water; 4, setting is carried out on a facture packer; 5, prepad fluid is injected, and a major fracture is formed; 6, the water-soluble degradable fiber temporary blocking fracturing liquid is injected into the formed major fracture in a step mode and injected into a stratum to form a new branch fracture; 7, the prepad fluid is injected into the formed new branch fracture, and the length of the fracture is expanded; 8, sand-carrying liquid is injected into the formed new branch fracture in a step mode; 9, the sand-carrying liquid in the shaft is extruded out by and replaced with active water. An old facture or a facture filled with sand is temporarily blocked, the new fractures are made on the original fracture in a certain angle direction, more unused areas of natural fractures and primary fractures are communicated, a new fracture flow leakage system is formed, oil and gas production and the ultimate recovery factor of an oil and gas field are improved, and the aims of restoring the yield of an old well and achieving facture production increase of a new well are achieved.

The invention discloses a construction method of a high-tension water-rich extra-large-section weak breccia tunnel. The method includes the steps of exploring distribution of fault weak breccia in front of a tunnel face by an advanced geological forecast method; distributing L-shaped gradient drain holes in two inner sides of the tunnel, providing sector drain holes and grouting holes, and allowing upper grouting and lower drainage; providing a combined cylinder grout-stopping wall, and performing a full-face advanced chemical grouting consolidation; constructing an advanced long tube shed with a circumferential closed advanced tube shed guide wall having a foundation, distributing tapered quincunx examining drain holes to detect grouting effect, and finally excavating the tunnel. Through the use of the techniques such as three-layer stereoscopic grouting and drainage, and cement-water glass and epoxy resin sequential grouting, the problem that a high-tension water-rich surrounding rock area with loose weak breccia has ineffective grouting consolidation and non-obvious water plugging effect is solved.

The invention provides a hydraulic fracturing treatment method of an unconventional reservoir oil and gas well. The hydraulic fracturing treatment method comprises the following steps: injecting a material liquid into existing fractures of a reservoir; enabling a temporary plugging material in the material liquid to form bridge blinding at the seams of the fractures; performing hydraulic fracturing construction to force the fractures to turn; and injecting an active liquid to activate microfractures of the reservoir, and the steps are performed at least once. By the adoption of the hydraulic fracturing treatment method of the unconventional reservoir oil and gas well, not only can a plurality of man-made fractures be formed, the microfractures of the reservoir can be activated, the drainage area is enlarged, and the single-well yield and the economic benefits are improved. The hydraulic fracturing treatment method provided by the invention is not only suitable for unconventional oil and gas reservoirs such as shale gas, coal bed gas and tight oil and gas but also applied to low-permeability and superlow-permeability conventional oil and gas reservoirs; and meanwhile, the method can be used for straight-well capacity increasing revamp construction and can also be used for capacity increasing revamp construction of horizontal wells, deviated wells and the like.

The invention discloses a well lid for emergency drainage. The well lid comprises a well lid supporting base, a lid plate and a plurality of windows, wherein the lid plate is matched with the well lid supporting base for forming a well lid; the windows are formed on the well lid supporting base; the lid plate comprises rotating plates which are the same as the windows in shape and quantity; the rotating plates are rotatably connected with the windows through connection shafts; the well lid further comprises a rotation piece and a transmission piece; the rotation piece is connected with the well lid supporting base and can rotate forwards and backwards; and the transmission piece is arranged between the rotation piece and the rotating plates, and is used for converting the rotation of the rotation piece into a force to drive the rotating plates to rotate forwards and backwards around the connection shaft, so as to open and close the windows. According to the well lid provided by the invention, the rotating plates rotate forwards and are entirely opened under the effect of the rotation piece and the transmission piece, drainage is fast performed, and emergency drainage is realized. In the drainage process, as long as the rotation piece is not rotated, the windows keep an opened state all along, so as to avoid blocking of drainage openings. After the drainage is finished, the rotation piece is reversely rotated so that the rotation piece is reversely closed under the driving of the transmission piece.

The invention relates to the technical field of coal bed gas exploration and development, in particular to a coal bed gas U-shaped well staged fracturing exploitation technology. The technology includes the steps of firstly, performing U-shaped well completion; secondly, performing U-shaped horizontal well horizontal section staged hydraulic spraying and sand fracturing; thirdly, communicating the U-shaped horizontal well with a vertical shaft again; fourthly, pumping and exploiting. The technology has the advantages that beneficial well sections can be selected, compaction zone pollution can be eliminated, crack turning can be avoided, crack extension can be guaranteed, crack with sufficient width can be achieved, stratum crack initiation pressure is lowered, coal bed modification volume is increased, coal bed permeability is increased effectively, oil draining area is increased, shaft seepage velocity is increased, output is increased, post exploitation process is simplified, operation cost is lowered, and coal bed gas exploitation effect is increased effectively.

The invention provides a compound huff-puff oil recovery method by using steam and an oil-soluble viscosity reducer. The method comprises the following steps: a. embedding of a steam injection pipe column: the structure of the pipe column is a uniform steam distribution pipe column which is sequentially provided with a uniform steam distribution valve and a compensator from the bottom to top, an injection and recovery integrated pump is connected with the upper part of the pipe column, an oil pipe is arranged on the pump, and a sub-critical steam injection well mouth is adopted; b. injection of the viscosity reducer: firstly the oil pipe is filled with the oil soluble viscosity reducer, then a casing valve is closed, and the oil soluble viscosity reducer is continuously injected into a well bore; c. steam injection: the steam is annularly injected via an oil jacket; d. well soaking: the well remains soaking for 2-7 days after the steam is completely injected; e. open flow: when the pressure of the well mouth drops to 0.5MPa/day, open flow is controlled by an oil nozzle; and f. pumping startup: in the case of open flow up to the liquid quantity of 3t/d, the injection and recovery integrated pipe column is adopted for starting pumping.

The invention relates to medical human body wound drainage consumables and provides a three-cavity negative-pressure wound irrigation and drainage tube. The negative-pressure wound irrigation and drainage tube comprises an in-vivo drainage tube and an in-vitro connection tube, wherein the in-vivo drainage tube adopts an integral structure and is provided with a main drainage tube, an irrigation tube and a guide wire implanting tube which are parallelly arranged lengthways; the main drainage tube is arranged in the geometric center of the in-vivo drainage tube, and the irrigation tube and the guide wire implanting tube are located at the periphery of the main drainage tube; a lower groove is formed in the outer wall of the in-vivo drainage tube, and a plurality of drainage openings are formed in the lower groove and communicated with the main drainage tube; the in-vitro connection tube comprises an in-vitro drainage tube, an in-vitro irrigation tube and an in-vitro guide wire implanting tube which are mutually independent; the in-vitro drainage tube, the in-vitro irrigation tube and the in-vitro guide wire implanting tube are respectively communicated with the main drainage tube, the irrigation tube and the guide wire implanting tube which are arranged at the outer end of the in-vivo drainage tube. The three-cavity negative-pressure wound irrigation and drainage tube mainly adopts a three-cavity structure, is used for drainage of wounds deep in a human body and has the effects of being accurate in implanting, favorable in drainage and irrigation, resistant to blockage, and the like.

The invention provide a leaf-proof free-mounted pearls shape drainage tube, which is mainly used to breast vomica conduction after the operation of breat cancer and other coelom conduction. It comprises tube and bursa as a whole, and made from silica gel or rubber. The bursa comprises an imperforate bursa body and another bursa body with holes. The full length of drainage tube is 40 cm while the first imperforate 20 cm is out of body and the left 20 cm with holes is shaped strings of pearls and in the body. In the drainage tube, every 5 cm is mounted a pearls shaped expanded bursa with holes on the wall. The middle of tube is a ball shape imperforate bursa while the thickness of tube wall and bursa wall is 1-3 mm, which solve the problems of easy leak and demand for mounted, also increase the area of drainage hole by the ball shaped bursa, in particular having significantly effect on the preventing leak and block when suck the drainage tube in negative pressure. It can reduce the suffering of patients and related complications.

The invention relates to low-damage, low-cost and highly anti-drag and high-flowback slickwater comprising the components of 0.05-0.2 parts of a drag reducing agent, 0.15-0.3 parts of a discharge aid, 0.2-0.4 parts of a clay stabilizer, and 99.1-99.6 parts of clear water. The drag reducing agent is obtained by polymerizing acrylic acid, acrylamide, and sodium allylsulfonate. In field engineering science, large-displacement continuous dosing and fast flowback of the slickwater can be realized, and the slickwater has a good oil displacement function, such that a reservoir transformation effect is greatly improved.

The invention discloses a comprehensive mining technology of a drowned well, comprising the step 1: stratum unblocking pretreatment prior to water plugging; step 2: shallow plugging; step 3: deep plugging adjustment; and step 4: hydraulic deep penetration perforating and oil production recovery of an oil well. According to the characteristics of the drowned well, multiple mature technologies are organically comprehensively applied, with the combination of first dredging and subsequent plugging, the problem that no oil is produced after plugging is effectively solved. By first shallow plugging and subsequent deep plugging adjustment and in combination with hydraulic deep penetration perforating, the period of validity of mining is effectively prolonged and the input-output ratio is improved.

The invention relates to the technical field of fireproof doors and windows, and discloses a manufacturing process of a high-efficiency and energy-saving aluminum alloy fireproof window. The manufacturing process comprises the following steps that S1, profiles are processed, specifically, all parts of structures are cut, and then slotting and drilling operations are carried out; S2, inner parts are assembled, specifically, steel linings, sliding seats and cross columns are assembled, and then the assembled steel linings, sliding seats and cross columns are put into frames of a window sash and a window frame to assemble the window sash and the window frame; S3, punching is carried out, specifically, corners of the window sash and corners of the window frame are punched; S4, painting is carried out, specifically, antirust paint is sprayed; S5, glass is installed, specifically, double-layer glass is installed into the frame of the window sash and is sealed; and S6, accessories are installed, specifically, hardware accessories of the fireproof window are installed into slots and holes formed in the step S1. According to the manufacturing process of the high-efficiency and energy-saving aluminum alloy fireproof window, the cross columns, the sliding seats and the steel linings are installed in the window frame and the window sash, the steel linings and the cross columns are both made of steel, and the strength and the high-temperature resistance of the steel linings and the cross columns are superior to that of aluminum alloys, when the fireproof window encounters a fire, the strength and the fire resistance of the window frame and the window sash are enhanced by the steel linings and the cross columns, so that the stability of the fireproof window when encountering the fire is improved.

The invention provides an oilfield water injection method capable of realizing balanced displacement of remaining oil. The oilfield water injection method is mainly used for solving the problems of poor oil displacement efficiency and low petroleum recovery efficiency of the existing water injection development applied to a nonhomogeneous reservoir stratum. The method comprises the steps of forming holes in a shaft uniformly and densly, wherein the hole density in the transverse direction of the shaft is determined according to crustal stress, well network, remaining oil and physical properties, and the distance between two rows of holes in the longitudinal direction of the shaft is determeined according to the physical properties of an oil layer during the hole distribution process; carrying out construction according to the distributed holes, and forming a hole in the side direction; arranging a flow rate-adjustable water nozzle in the formed side hole; carrying out underground butt joint between an underground comprehensive testing and controlling meter in an automatic flow rate testing and controlling system and the flow rate-adjustable water nozzle, and adjusting the opening degree of the water nozzle to realize accurate control of the water injection quantity at each point; and beginning the water injection work. When the oilfield water injection method provided by the invention is used for injecting water, water injection quantities at all points are different according to the nonhomogeneity of each point of a reservoir stratum, and therefore, balanced displacement of remaining oil is realized, the water absorption profile of a water well is improved and the oilfield recovery efficiency is improved.

The invention discloses an oil production method and a well pattern. The oil production method includes the following steps that a steam injection well is deployed on an oil pool; the bottom of the steam injection well serves as a center of a circle, and a plurality of horizontal producing wells are deployed in a radial pattern; after deploying the plurality of producing wells, steam is injected in the oil pool through the steam injection wall; after the steam injection, oil layers in the oil pool are ignited by an igniter; after the oil layers are ignited, combustion-supporting gases are continuously injected into the oil pool through the steam injection well. According to the method, the development of a fire chamber is no longer in the direction of a single horizontal producing well, and the fire chamber is uniformly developed in the directions of the various horizontal producing wells arranged in a radial pattern, so that the firing range in the whole oil pool is gradually expanded and the probability of flame out is reduced. Meanwhile, flue gases, movable oil, firing lines and the like can move along the plurality of horizontal producing well, and therefore the firing lines uniformly advance towards multiple directions, the swept volume of combustion is enlarged, the exploiting effect is improved, and the oil production efficiency is improved.

The invention discloses an in-section multi-cluster fracturing slide sleeve, which comprises an outer tube, a spray nozzle, a slide sleeve, a throttle tube, a ball seat, a clamp spring, a lower joint and the like, wherein the spray nozzle is bonded and arranged on the outer tube; the slide sleeve is arranged in the outer tube, is connected with the outer tube through a shearing pin, and is sealed through a slide sleeve sealing ring; the ball seat is arranged in a position of a ball seat hole formed in the middle part of the slide sleeve; the clamp spring is arranged at the tail of the slide sleeve; the throttle tube is arranged in the slide sleeve and is fixed with the slide sleeve through a connecting pin; and the lower joint and the outer tube are connected through screw threads, are fixed through anti-falling pins and are sealed through a lower joint sealing ring. The in-section multi-cluster fracturing slide sleeve has the advantages that the slide sleeve opening and ball passing actions are realized through diameter reduction and expansion of the ball seat; a plurality of fractures can be opened through one ball; the in-section multi-cluster fracturing in an open-hole horizontal well can be realized; the oil drainage area of the horizontal well can be effectively increased; the initial output and the final recovery ratio are improved; meanwhile, through the design of throttle fracture holes in the outer tube, fixed-point crack positioning can be realized; the influence of near-well zone stress (due to drilling) is reduced; the pressure division probability is increased; and the fracturing effect is further improved.

The invention provides an expansion screen pipe which comprises an inner layer pipe, a middle layer pipe and an outer layer pipe, wherein the inner layer pipe, the middle layer pipe and the outer layer pipe are fixed and mounted in a sleeved mode in sequence from inside to outside. Multiple kerfs are distributed in the pipe wall of the inner layer pipe, the middle layer pipe is formed by coiling filaments spirally, and multiple holes are also distributed in the pipe wall of the outer layer pipe. The expansion screen pipe has the advantages that the granulometric class of filtered gravel can be controlled accurately, an oil drainage area is enlarged through expansion hole enlargement, oil flow resistance is reduced at the same time, and crude oil produced by a single well daily can be improved by 30-50 percent.

The invention discloses a high-silicon cast iron electrode and an end station ocean ground. The electrode comprises a body and a conductive part, and the body is in a plate shape and comprises a firstpart and an annular second part which are arranged and are connected from inside to outside. One wall surface of the second part is a conical surface, and the conical surface is gradually inclined from the inner side of the second part to the outer edge of the second part, so that the thickness of the second part is gradually reduced from the inner side of the second part to the outer edge of thesecond part. The conductive part comprises a conductive column and a conductive plate, the conductive plate is buried in the first part, one end of the conductive column is vertically connected to the conductive plate, and the other end penetrates out the first part towards the side where the conical surface is located along the axial direction of the body and is used for connecting a cable. According to the invention, by adopting the plate-shaped structure, the drainage area can be increased, a current path can be changed, the drainage uniformity can be improved, a necking effect can be eliminated, the problem that the rod-shaped electrode is easy to break can be solved, and the working life specified by the design can be achieved.

The invention provides an all-dimensional three-dimensional fracturing method for a vertical well of a reservoir with ultra low permeability. The method comprises the following steps that firstly, a shaft of the target reservoir is subjected to first volume fracturing to form a main crack extending in the direction of the maximum principal stress and secondary net-shaped cracks around the main crack, and the main crack is temporarily blocked; secondly, the shaft of the target reservoir is subjected to second volume fracturing, since the maximum principal stress field within a certain range around the shaft turns over at almost 90 degrees after first volume fracturing, a secondary main crack perpendicularly intersecting with the main crack generally can be constructed through second volumefracturing, and net-shaped cracks are formed around the secondary main crack. By means of the method, the all-dimensional three-dimensional net-shaped cracks can be constructed in the vertical well through fracturing, the transformation volume of an oil well is greatly increased, and the productivity of the oil well is improved.