CN202157775U - Lifting-lowering type returnable double-slider fishing spear - Google Patents

Abstract

A lifting-lowering type returnable double-slider fishing spear is applied to junk fishing under the shaft of oil fields. A limit pipe and an inner pipe are in threaded connection with the lower end of an upper connector, compression springs are sleeved on the limit pipe and the inner pipe, a guide mechanism is sleeved on the outer wall of the inner pipe, and the outer wall of the inner pipe is provided with a guide groove, and the guide groove includes a short rail groove and a long rail groove. A radial guide pin is arranged on a rotary ring, the inner end of the guide pin is arranged in the guide groove, sliders are symmetrically distributed on the wall of a spear pipe, and the spear pipe is provided with a slide sleeve connected with the lower end of the inner pipe. The lifting-lowering type returnable double-slider fishing spear has the advantages of being capable of fishing cylindrical junks in wells, retreating from fishing state when blocked, improving fishing success rate and adopting a lifting and lowering method to safely retreat and reduce risks of operation under the shaft.

Description

Lifting type can move back double-slider and drag for lance

Technical field

The utility model relates to fishing operation field, down-hole, oil field, particularly a kind ofly salvages the fishing spear that down-hole tubulose junk is used, and is that a kind of lifting releasing slide block drags for lance.

Background technology

At present, in oil well repairing operation, the main fishing spear of using is that double-slider or single sliding block drag for lance.Double-slider or single sliding block drag for lance because its effect simple in structure, easy to maintenance and use is reliable, fishing success ratio is high.But because the defective of himself structure, as: can not withdraw from behind the engagement with the fish, often cause down-hole accident complicated, therefore under the unclear situation of down-hole situation, can not use as the first-selected instrument that the tubulose fish is salvaged.In addition in oil field high angle hole or horizontal well well workover fishing, because gravity is different with the slide block glide direction, slide block freely glides limited, drags for to obtain afterwards that instrument can not withdraw from, and causes fishing success ratio low.

The utility model content

The purpose of the utility model is: provide a kind of lifting type can move back double-slider and drag for lance, drag for the lance exit function but increased slide block, solved existing slide block and dragged for and can not effectively withdraw from or low in the horizontal well fishing success ratio technological deficiency that has a big risk after lance is salvaged.

The technical scheme that the utility model adopts is: lifting type can move back double-slider and drag for lance; Mainly form by top connection, position-limiting tube, compression spring, interior pipe, guiding mechanism, slide block, sliding sleeve and lance pipe; There is internal thread the upper end of top connection, can connect the lower end of fishing string, it is characterized in that: position-limiting tube is threaded in the lower end of top connection; Be connected with interior pipe in the lower end of position-limiting tube, the external diameter of position-limiting tube is greater than interior external diameter of pipe; At the outer compression spring that is with of position-limiting tube and interior pipe, and on the top of compression spring at guiding mechanism; On the outer wall of pipe, on the outer wall of interior pipe, gathering sill is arranged in guiding mechanism is enclosed within, gathering sill is divided into short rail groove and long rail groove.Those skilled in the art know the structure of gathering sill, are not described in detail.Described guiding mechanism comprises loam cake, guide finger, up-thrust bearing, swivel becket, lower thrust-bearing and guiding overcoat; The lower end of guiding overcoat is fixed on the top of lance pipe, and the lower end of interior pipe is inserted in the lance pipe; The swivel becket of lower thrust-bearing, up-thrust bearing, annular and the loam cake of annular are arranged in guiding from top to bottom in the overcoat, in loam cake is enclosed within on the outer wall of pipe and the loam cake screw thread be fixed on the upper end of guiding overcoat; Guide finger is radially arranged on swivel becket, and the inner of guide finger is in gathering sill; On the wall of lance pipe, be symmetrically distributed with two rectangular holes, be embedded with a slide block at each slot, the inwall of slide block has taper seat; The sliding sleeve that the pipe lower end connects in lance Guan Youyu, sliding sleeve has the inclined-plane, when the moving sliding sleeve of interior pipe racks upwards slides, can promote slide block and radially outward slide; When interior pipe racks moves sliding sleeve to lower slider, can promote slide block radially inwardly slides.

Lifting type can move back the course of work that double-slider drags for lance: consult Fig. 1.When salvaging the tubulose junk, connect at fishing string bottom, guide finger 6 the inners also are in the short rail groove of interior pipe 4 outer walls, make 3 compressions of compression spring, and slide block 11 external diameters are in minimum state.Salvage step: after lance pipe 13 gets into fish, press down fishing string, guiding overcoat 10 upwards slides and compresses compression spring 3; Long rail groove in guide finger 5 gets on pipe 4 outer walls; Carry fishing string then, it is descending relatively that compression spring 3 promotes guiding overcoat 10, and slide block 11 presents the salvaging state.When salvaging chance calorie requirement withdraws from, transfer fishing string this moment, top of fish promotes guiding overcoat 10 and moves upward relatively; The short rail groove of pipe 4 outer walls in guide finger 6 gets into; Sliding sleeve 12 is up, drives slide block 11 and is in the external diameter minimum state, can realize that slide block drags for lance safety and withdraws from.

The beneficial effect of the utility model: the utility model lifting type can move back double-slider and drag for lance; Lifting type can move back double-slider and drag for lance and can salvage well interior cylindrical junk; After meeting card, can withdraw from the salvaging state; Overcome conventional slide block and dragged for the defective that lance can not withdraw from, enlarged the scope of application that conventional slide block drags for lance, improved fishing success ratio; Adopt the handling mode to realize that safety withdraws from, and has reduced the underground work risk.Have simple in structure, operation, easy to maintenance, the safe and reliable outstanding feature that withdraws from.

Description of drawings

Fig. 1 is that the utility model lifting type can move back double-slider and drags for lance structural profile sketch map.

Fig. 2 is the gathering sill sketch map on interior pipe 4 outer walls.

Among the figure, the 1-top connection, the 2-position-limiting tube, 3-compresses spring, pipe in the 4-, 5-loam cake, 6-guide finger, 7-thrust bearing, 8-swivel becket, 9-alignment pin, the 10-overcoat that leads, 11-slide block, 12-sliding sleeve, 13-lance pipe.

The specific embodiment

Embodiment 1: can moving back double-slider with a lifting type, to drag for lance be example, and the utility model is done further explain.

Consult Fig. 1.The utility model lifting type can move back double-slider and drag for lance, mainly is made up of top connection 1, position-limiting tube 2, compression spring 3, interior pipe 4, guiding mechanism, slide block 11, sliding sleeve 12 and lance pipe 13, and there is internal thread the upper end of top connection 1.

The position-limiting tube 2 that is threaded in the lower end of top connection 1, pipe 4 in the lower end of position-limiting tube 2 is connected with, the external diameter of position-limiting tube 2 is greater than interior pipe 4 external diameters.At the outer compression spring 3 that is with of position-limiting tube 2 and interior pipe 4, and on the top of compression spring 3 at guiding mechanism.In being enclosed within, guiding mechanism on the outer wall of pipe 4, on the outer wall of interior pipe 4, gathering sill is arranged.Consult Fig. 2.Gathering sill is divided into short rail groove and long rail groove.Consult Fig. 1.Described guiding mechanism comprises loam cake 5, guide finger 6, up-thrust bearing 7, swivel becket 8, lower thrust-bearing 9 and guiding overcoat 10.The lower end of guiding overcoat 10 is fixed on the top exterior walls of lance pipe 13, and the lower end of interior pipe 4 is inserted in the lance pipe 13; The swivel becket 8 of lower thrust-bearing 9, up-thrust bearing 7, annular and the loam cake 5 of annular are arranged in guiding from top to bottom in the overcoat 10, in loam cake 5 is enclosed within on the outer wall of pipe 4 and loam cake 5 screw threads be fixed on the upper end of guiding overcoat 10.A columniform guide finger 6 is radially arranged on swivel becket 8, and the inner of guide finger 6 is in gathering sill; On the wall of lance pipe 13, be symmetrically distributed with two rectangular holes, a slide block 11 arranged in that each slot is embedded respectively, the inwall of slide block 11 has taper seat.At lance pipe 13 sliding sleeve 12 that is connected with interior pipe 4 lower ends is arranged, sliding sleeve 12 outer walls have the inclined-plane.

Claims (1)

1. a lifting type can move back double-slider and drag for lance; Mainly form by top connection (1), position-limiting tube (2), compression spring (3), interior pipe (4), guiding mechanism, slide block (11), sliding sleeve (12) and lance pipe (13); There is internal thread the upper end of top connection (1); It is characterized in that: the position-limiting tube (2) that is threaded in the lower end of top connection (1), be connected with interior pipe (4) in the lower end of position-limiting tube (2), the external diameter of position-limiting tube (2) is greater than interior pipe (4) external diameter; At the outer compression spring (3) that is with of position-limiting tube (2) and interior pipe (4), and on the top of compression spring (3) at guiding mechanism; Guiding mechanism is enclosed within on the outer wall of interior pipe (4), on the outer wall of interior pipe (4), gathering sill is arranged, and gathering sill is divided into short rail groove and long rail groove; Described guiding mechanism comprises loam cake (5), guide finger (6), up-thrust bearing (7), swivel becket (8), lower thrust-bearing (9) and guiding overcoat (10); The lower end of guiding overcoat (10) is fixed on the top of lance pipe (13), and the lower end of interior pipe (4) is inserted in the lance pipe (13); In guiding overcoat (10), the swivel becket (8) of lower thrust-bearing (9), up-thrust bearing (7), annular and the loam cake (5) of annular are arranged from top to bottom, loam cake (5) is enclosed within on the outer wall of interior pipe (4) and loam cake (5) screw thread is fixed on the upper end of the overcoat (10) that leads; Guide finger (6) is radially arranged on swivel becket (8), and the inner of guide finger (6) is in gathering sill; On the wall of lance pipe (13), be symmetrically distributed with two rectangular holes, be embedded with a slide block (11) at each slot, the inwall of slide block (11) has taper seat; At lance pipe (13) sliding sleeve (12) that is connected with interior pipe (4) lower end is arranged, sliding sleeve (12) has the inclined-plane.

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