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 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 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.