Fishing tools are the most widely used tools for oil well overhaul construction, the most frequently used, and the most complete types and specifications of special tools. There are many types and specifications of fishing tools. According to the types of falling objects in the well, they can be divided into five categories: pipe fishing tools, rod fishing tools, rope fishing tools, logging tools fishing tools, and small objects fishing tools. According to the structural characteristics of knot tools, they can be divided into six categories: cone, spear, tube, hook, basket, and others.
Releasing and circulating overshot:
Releasing and circulating overshot is one of the fishing tools which can externally engage the pipe,it can fish drill collar,drill pipe,tubing and other pipes. The tools have installed seal,it can circulate drilling fluids in the higher pump pressure after catching the fish. There is a guide shoe at the bottom of overshot which can centralize the fish. It can also work with jars to catch the stuck fish. If the caught fish cannot be release from sticking,it can release the overshot and trip out the drill string.
LM-T type releasing spear is one of the fishing tools which can catch the fish internally. Mainly used for catching drilling pipe,casing,tubing and other cylindrical hollow type fish in oil and gas flied well repairing. It can use with other tools such as internal casing cutter,jars. If the fish was struck and cannot be lift,release the spear and trip out the drill string.
Sliding block spear:
It is an inside fishing tool for fishing the junk internally such as fishing drill pipe,tubing,washover pipe,liner,packer,water distributor,etc which has tnternal bore. It also can do back off for the stuck junk or use with other tools. This tool has simple structure,caonvenient operation,and convenient maintenance.
It is mainly used for fishing casing, which is a tool to pull the fish out of the well or out of the magnitude by grasping the inner diameter of the fish. It has the characteristics of simple operation, high strength, large slip area and wide fishing range, and can be used alone. It can also be used in conjunction with cutter tools, etc., to complete the cutting and salvage at one time. If the salvage fails, the tool can be easily withdrawn from the fish.
Reverse circulating junk basket:
It is a fishing tool that uses the partial reverse circulation of the drilling fluid flow near the bottom of the well to collect the downhole debris into the basket. It is mainly used for fishing small falling objects, such as drill cones, tooth chips, broken iron and hand tools.
It is an effective tool while drilling, which is used to catch the heavier iron filings or metal filings that cannot be brought out of the wellbore by the normal mud circulation during the drilling process.
It is a tool for salvaging small objects downhole in petroleum and geological drilling work. It has the advantages of simple structure, convenient operation, reliable performance, small size and light weight. Use its own permanent magnet to magnetize and pick up small objects such as drill clamps, cones, bearings, slips, slips, jaws, and other tools that fall into the well.
Reverse circulating fishing magnet:
It uses the local reverse circulation of the drilling fluid flow near the bottom of the well to absorb downhole debris. It mainly relies on large flow and high pressure backwashing mud to hit the bottom of the well to make falling objects move in suspension and be adsorbed on the surface of the magnet to achieve salvage.
It is a tool for making buckles and fishing in the inner holes of drill pipes, tubing, etc. with holes and falling objects. It has a high success rate for falling objects on pipes with couplings. It can work with right or left hand drill pipe and other tools,for all kinds of fishing job.
The die collar is a special external fishing tool which is engarged on the outside wall of tubular objects such as tubing and drill pipe etc. It is also used to catch the cylingder junks which have no inner bore or the inner bore is blank off. It can work with right or left hand drill pipe and other tools to achieve all kinds of fishing job.