Overview of the most complete fishing tools in history (detailed, large quantity, professional)

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Original title: Overview of the most complete fishing tools in history (detailed, large quantity, professional) Overview During drilling and completion and downhole operations, the drill pipe, drill collar, casing and tubing string are stuck or broken, the bit cone falls into the well, the logging instrument or cable is stuck, the cable wire rope is broken, the packer is stuck, sand settling, serious leakage, well collapse, blowout and other reasons lead to the interruption of normal drilling, workover and completion operations. It is necessary to use fishing tools or take special measures to remove leakage, collapse, sticking and spraying to restore normal operation. The operation and process of removing leakage, collapse, sticking and spraying are called "salvage". Practical experience tells us that salvage operations are inevitable. According to domestic statistics in the past, there may be one well for every five wells drilled, and four wells for every five wells repaired may need to be salvaged. Therefore, it is necessary to prepare common fishing tools and understand and master common fishing techniques. 1 Classification of fishing methods 1. According to the fishing string Soft fishing: steel wire (rope)/cable Hard fishing: tubing/drill pipe/coiled tubing Soft fishing: steel wire (rope)/cable Hard fishing: tubing/drill pipe/coiled tubing 2. According to the occlusion relationship Internal fishing: fishing spear/male awl/external hook External fishing: overshot/female cone/internal hook/fishing basket 2 Classification of fishing tools Internal fishing: fishing spear/male awl/external hook External fishing: overshot/female cone/internal hook/fishing basket 2 Classification of fishing tools External fishing: retractable overshot, female cone, internal hook, three-ball fishing device, etc. Internal fishing: male cone, retractable fishing spear, casing fishing spear, external hook, back-off, fishing spear. Others: Strong magnetic fishing device, reverse circulation strong magnetic fishing device, fishing cup, reverse circulation strong magnetic fishing basket, reverse circulation,Mining Drilling Equipment, ring fishing basket. 3 Expand the full text String fishing tool 1. Retractable slip overshot 1) Purpose: It is a special fishing tool for fishing drill collar, drill pipe, tubing and other columnar fish from outside in drilling and workover engineering. It is designed according to the outside diameter of drill collars, drill pipe, tubing, joints, couplings and other well pipes. When the fish is caught and can not be fished out, the fishing drum can be withdrawn from the fish and lifted back to the ground. In addition, the slip overshot can carry out high-pressure mud circulation after catching the fish. It is also provided with a milling shoe which can effectively repair the top of the fish and is convenient for the fish to enter the overshot smoothly. 2) Structure: Consists of an upper joint, a cylinder body and a guide shoe. It is composed of grappling slip, packing and milling shoe or control ring, as shown in the figure below. 6) "A" shaped packing It is a rubber short cylinder with a sealing lip inside, which is used for sealing between the outer diameter of the fish and the inner wall of the cylinder. It is used with spiral slips of various sizes and is installed on the upper part of the cylinder. Use the inclined plane at the lower end of the upper joint to compress it properly,dth hammer bit, which is airtight.  Once the downhole tool is stuck, the drill string above the stuck point can be removed by means of the safety joint, and it can also be butted when drilling again. 200,Borehole Drill Bits,000 | 300,000 | 400,000 A high-paying position as an engineer ↓↓ Click "Read the original article" to find a high-paying job. Return to Sohu to see more Responsible Editor:. wt-dthtools.com

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