37results about How to "Increase seepage area" patented technology

The invention discloses the petroleum use lamination backlog to fill guards against sand pipes the column, was suitable to the multi- oil layers extrusion packing tube column, in was sufficient string of tubing including ram and in fills the tool, outside filled the tube column including the crown hook wall packer, outside filled the tool and the sand filter, outside filled on the tool to be equipped with fills the mouth. In fills the tube column to be equipped with the seat to seal washes one's hands of, outside fills the tube column to be equipped with the level the packer. After the seat seals washes one's hands of is hit the pressure to cause the crown to hang the packer place to seal, the seat seals washes one's hands of prearranges the hook wall packer separation, in fills the tube column to be able to fill in the tube column in outside to reciprocate sits the sealing course gap, fills the tool coordination backlog with outside to fill the stratum. Enhances guards against the granulated substance effect and the term of validity. The next tube column then completes many oil layers lamination backlog to fill guards against the granulated substance the construction, greatly reduced the production cost and worker's labor intensity.

The invention provides a novel composite perforating gun, which belongs to the technical field of oilfield well completion, and includes a gun head, a perforating gun body, and a gun tail. A number of blind holes are opened on the surface of the perforating gun body, and a bullet rack is arranged inside the perforating gun body. , the loading hole opened on the surface of the bullet rack corresponds to the blind hole, the blind hole is in the shape of an inverted cone, and symmetrical blocks are fixed on the inclined surface of the blind hole, and baffles are inserted between the symmetrical blocks. An O-ring is provided at the contact position between the plate and the inclined surface of the blind hole. The invention can better fix the perforating bullet in the charging hole, which ensures the stability of the perforating gun. The design of the blind hole can effectively increase the explosion height of the perforating bullet in the gun body, which is beneficial to improve the safety of the perforating bullet. Penetrating deep, the perforating gun has no burr after detonation, the gun hole does not deform, and it can effectively reduce formation pollution.

The invention provides a gas-producing system capable of improving permeability of a tight oil reservoir and application thereof, belonging to the technical field of oilfield development. The gas-producing system comprises a microcapsule and hydrochloric acid; the microcapsule uses a mixture of urea and sodium nitrite as a core material and a mixture of azodiisobutyronitrile, styrene, methyl methacrylate and methacrylic acid as a capsule dressing. In operation, nitrite and the microcapsule are injected into a stratum to a predetermined depth; and the microcapsule undergoes corrosion under stratum conditions and chemically reacts with hydrochloric acid to produce a great amount of gas and release a great amount of heat, so local high pressure is formed in a predetermined part. According to the invention, effective seepage channels of difficult-to-produce reserves such as an ultralow-permeability oil reservoir and the tight oil reservoir are increased so as to improve permeability, increase local energy of reservoirs and the flowback rate of raffinate, and reduce reservoir contamination, so the purpose of improving the recovery efficiency of the difficult-to-produce reserves is achieved.

The invention relates to the technical field of agricultural planting, and particularly relates to a water fertilizer smart irrigation system. The system comprises planting rows, a water circulation device, a water fertilizer irrigation device, a controller and a management module, wherein the water circulation device is used for recycling water drained from soil; the water fertilizer irrigation device comprises a storage tank, an agitation paddle, a discharge pipe and fertilizing pipes; the storage tank is connected with a water storage tank through a circulating pipe; the discharge pipe is connected with the storage tank through a draining pump; the fertilizing pipes are respectively positioned on each planting row and connected with the discharge pipe; each fertilizing pipe comprises apipe body and a helical push rod; and the controller can be used for controlling the water circulation device and the water fertilizer irrigation device according to the management module. The water fertilizer smart irrigation system can be used for dividing planting into several sections and independently each section of planting rows, so that occurrence of growth difference among W oranges can be reduced.

The invention discloses an integrated pack-off and filling tool for sand control and well completion, which relates to the technical field of downhole operation tools for oil and gas wells, including an upper joint, a sealing assembly, a filling assembly and a lower joint, and also includes a backwashing assembly, a central pipe I, and an upper joint , backwash assembly, center pipe Ⅰ, filling assembly and lower joint are fixedly connected from top to bottom, and the sealing assembly is sleeved outside the center pipe Ⅰ; the backwash assembly is equipped with a return spring, which enhances the flexibility of backwash operations. Reliability; the filling component is equipped with a filter ring and an anti-erosion inner ring, which prolongs the service life of the integrated pack-off and fill tool; this device can be run in one trip without lifting the pipe string or running in other tools. Under normal circumstances, it can complete backwashing, setting, sealing, fracturing filling, circulating filling and production operations; compared with traditional operating tools, it can save more than half of the construction time and greatly reduce the construction cost.

The invention provides an oil and gas well test pit water power kerf test process tubular column structure. The structure comprises an oil tube (4), the lower portion of the oil tube (4) is successively docked with a power part (8), one or more cutters and ball heads (11), the outer wall of the oil tube (4) is successively provided with, from top to bottom, a pump seat (12), a positioning short section (5), a packer (6) and a centralizer (7). Compared with the conventional perforating technique, the oil and gas well test pit water power kerf test process tubular column structure solves the problem of insufficient depth of the perforating technique, perforating compacted belt and pollution, and simultaneously increases seepage area; compared with hydraulic fracturing, the construction is simple, the cost is low, the produced cracks are easy to control, and the effect of production increase and injection increase is obvious.

Hydraulic deblocking acidification process. The process includes the following steps: (1), removing the wellhead; (2), lifting the original well pipe string; (3), launching the hydraulic unplugging acidizing string; (4), magnetic positioning; (5), high-pressure hydraulic unplugging acidizing; (6), ground pressure test: ground pressure test 55Mpa, 10min no puncture and no leakage pressure test qualified; (7), hydraulic unblocking acidification layer 1; (8), ball slipping sleeve; (9), hydraulic unblocking acidification 2 (10), ball-throwing sliding sleeve; (11), 3 layers of hydraulic unplugging and acidification; (12), flowback after 12 hours of well shut-in reaction; (13), starting and unplugging acidizing string; (14), (15) Lower completion string: lower stratified water distribution tools, anti-corrosion tubing, coated with sealing grease; wellhead and finishing. This application fully uses physical methods to increase the effective penetration distance of acid liquid in the formation, and improves the permeability of the formation in a large range, so as to achieve the purpose of increasing production and injection.

The invention provides a liquid collecting device for rock core fluid full-surface saturation and a full-surface saturation method. The upper portion of the liquid collecting device is connected witha rock core clamping device with the open bottom in fixed and sealed modes, a rock core is fixed into an inner cavity of the rock core clamping device, and the liquid collecting device comprises a pressure-bearing connector connected with the bottom of the rock core clamping device in sealed and fixed modes. The lower portion of the pressure-bearing connector is in sealed connection with a constant-pressure liquid collecting cylinder, a piston type connector is sealed in the pressure-bearing connector in a penetrating mode, and the top of the piston type connector extends into a bottom openingof the rock core clamping device and connected into the inner cavity of the rock core clamping device in a sealed mode. The bottom of the piston type connector extends into an inner cavity of the constant-pressure liquid collecting cylinder. A center passage is formed in the piston type connector, and a piston is slidably arranged in the center passage. The side wall of the constant-pressure liquid collecting cylinder is provided with a saturation oil passage, and the bottom of the constant-pressure liquid collecting cylinder is provided with a liquid discharging outlet capable of being closed. According to the liquid collecting device for rock core fluid full-surface saturation and the full-surface saturation method, the full surface of the rock core can make contact with water / oil, theflow seepage speed is high, and the volumes of the saturated water and the saturated oil can be accurately measured.

The invention discloses a drainage pipe with a replaceable side slope and a construction method thereof. A sector-shaped drainage pipe (2) is connected to the lower portion of a sector-shaped permeable layer (1) to constitute a circle, and a plastic blind groove pipe filter layer (3) is wrapped on the periphery of the sector-shaped permeable layer (1) and the periphery of the sector-shaped drainage pipe (2). A cylindrical filter sieve (4) is wrapped on the periphery of the plastic blind groove pipe filter layer (3), a through hole is formed in the part above a circle of the cylindrical filter sieve (4), and the part below the circle is sealed. At least one layer of geofabric filter layer (5) is wrapped on the periphery of the cylindrical filter sieve (4), and a rigid supporting layer (6) is wrapped on the periphery of the geofabric filter layer (5). A big through hole is formed in the rigid supporting layer (6) in an all-dimensional mode, and pins (7) are inserted in end openings of all the layers to be fixedly connected. The drainage pipe with the replaceable side slope can prevent plugging, and is durable, quick, capable of preventing secondary seepage and capable of replacing the inside structure of the drainage pipe after being used for a period.