CN2869293Y - Clamping-tooth-free oil pipe fishing spear - Google Patents

Abstract

The utility model relates to a toothless oil pipe spear, belonging to a well litter fishing device. After putting into production of oil well, oil pipes in vertical, deviated and horizontal sections usually break in the well. Currently, fishing device is mainly used for fishing oil pipe from the screw thread of connection of the broken oil pipe, but because for some oil pipe, the broken position does not have screw thread, thereby posing a difficulty to fish. The utility model comprises a three-tooth piece connected with spindle, a releasing ring under the spindle and a guide shoe connected through screw thread. The said spindles are cylinders with different diameters made of 35CrMo steel, on which a tapered hole is provided at the left side, equipped with a female fastener and connected with low connector during operation, the surface of the right side is toothed and a track groove is provided at the diameter of big end of the spindle. During operation, down in hole the three-tooth piece holds the broken oil pipe, and then upwards pumping rod can fish the dropped oil pipe out of the well. The utility model is broadly used for oil pipe fishing operation in deviated and horizontal wells.

Description

A kind of no card tooth tubing spear

Technical field:

The utility model relates to a kind of no card tooth tubing spear, belongs to oil well fishing junk device class.

Background technology:

After bringing in no matter in peupendicular hole section, lower curved section and the net horizontal section back OIH pipe phenomenon that fractures that occurs sometimes bringing in, traditional processing method is by the fishing spear G.I.H, to drag for lance and tubing coupling screwed connection then together, on carry fishing tool, just can the fracture oil pipe fish for up, yet, some fracture oil pipe does not have screw threads of coupler, therefore, use conventional fishing tool just can't fish for, make oil well just can not continue to produce.

The utility model content:

The purpose of this utility model is a kind of no card tooth tubing spear that provides in order to overcome above-mentioned shortcoming, can salvage the disconnected integral joint tubing that drops in the oil well.

The technical solution of the utility model is:

For achieving the above object, the three tooth sheets that connect by mandrel of the utility model and the release ring below the mandrel and encircle and the guide shoe of screwed connection is formed by discharging; The different thicknesses diameter circle cylinder that described mandrel adopts the 35CrMo steel to be made, left end has conical bore, has box, is connected with lower contact during work, and the right-hand member surface is a dentation, on every side rail groove is arranged in mandrel outside diameter position.

Its thickness that described three tooth sheets adopt the 40NiCrMo alloy steel material to be made is 15 millimeters, and long 200 millimeters steel disc is placed in the circular groove track of mandrel bottom.

The utility model working method is:

When the oil pipe in the oil well is salvaged, at first be connected with the fishing spear lower contact with oil pipe, mandrel by the public screw thread of lower contact and this instrument connects together, after minor diameter in instrument is lowered into oil well is salvaged section, continue to be lowered to after entering the fish chamber, upper lifting pipe post again, make to be fixed on mandrel and to discharge the pin that encircles the top and cut off, at this moment three tooth sheets are expansible, block oil pipe and produce friction with tube inner wall, draw when dragging for integral joint tubing inwall in the bar section to major diameter and add original position when three tooth sheets, promptly realize salvaging, as in upper lifting pipe post process, circuitous to the circuitous card of tubing string, only need positive rotation tubing string 3-5 circle, three tooth sheets can enter minor diameter again and drag for the bar section at this moment, and oil pipe is tripped out smoothly.

The utility model compared with prior art has distinguishing feature.

Owing to adopted slidably three tooth sheets in the structure of the present utility model, pass through the contact and the chucking mode of integral joint tubing inwall during salvaging, the oil pipe that will break in the sidetracked hole net horizontal section of success salvages, the utility model size is little, can salvage Φ 50.3, Φ 73, Φ 88.9 and 100.3 millimeters integral joint tubings of Φ, success rate reaches 100%.

Description of drawings:

Figure is the utility model structural representation.

Among the figure by 1, mandrel, 2, three tooth sheets, 3, discharge ring, 4, guide shoe, 5, pin, 6, rail groove forms.

The specific embodiment:

The utility model is provided by following examples.

Below in conjunction with accompanying drawing the utility model is described further.

Among the figure, mandrel 1 becomes different thicknesses diameter circle cylinder for the 35CrMo material, and left end has conical bore to have box, is connected with the fishing spear lower contact during work, and the right-hand member surface is a dentation, on mandrel outside diameter lower end position circumference rail groove 6 is arranged.

Three tooth sheets 2 are for to have adopted the 40NiCrMo alloy steel material to be made, and its thickness is the steel disc of 200 millimeters of 15 millimeters long, are placed in the circular trough track of mandrel 1 by three sliding some points, and every steel disc is 120 with mandrel center angle and spends angles.

Discharge ring 3 and adopt the 35CrMo material, position under the mandrel between mandrel 1 and the guide shoe 4 is shaped as a semicircular ring, and semicircular ring is by being fixed on above the mandrel 1 with pin 5; Semicircular ring can be used to the fixing three tooth sheets 2 that draw in, makes three tooth sheets unlikely distending in the way of going into the well, and is sheared disconnectedly when guide shoe 4 enters the fish section back fixing pin 5 that is hampered, and discharges thus and cease to bind, makes three tooth sheet distendings in the oil pipe of fracture, thereby implements salvaging.

Claims (2)

1, a kind of no card tooth tubing spear comprises the three tooth sheets (2) that connected by mandrel (1) and the release ring (3) below the mandrel (1) and encircles and the guide shoe (4) of screwed connection is formed by discharging; It is characterized in that: the different thicknesses diameter circle cylinder that described mandrel (1) is made for the 35CrMo steel, left end has conical bore, has box, is connected with lower contact during work, the right-hand member surface is a dentation, on every side rail groove (6) is arranged in mandrel (1) outside diameter position.

2, a kind of no card tooth tubing spear according to claim 1, it is characterized in that: its thickness that described three tooth sheets (2) adopt the 40NiCrMo alloy steel material to be made is 15 millimeters, long 200 millimeters steel disc is placed in mandrel (1) the lower tracks groove (6).