CN203822229U - Rotary-hook-type broken drilling tool fisher - Google Patents

Abstract

The utility model discloses a rotary-hook-type broken drilling tool fisher. The fisher comprises a drill rod, wherein an upper flange plate and a lower flange plate are welded at the end parts of the drill rod; the lower flange plate is provided and welded with a rotary-hook blade; a circular arc-shaped clamping groove is formed between the lower flange plate and the rotary hook blade ; the width of the clamping groove, from a clamping groove inlet to a clamping groove root part, is the same and slightly larger than the diameter of the drill rod of a broken drilling tool; the external size of the clamping groove inlet is slightly enlarged to take the shape of a bell mouth; reinforced stiffening blocks are arranged between the joints of the upper and lower flange plates and the drill rod. The rotary-hook-type broken drilling tool fisher has the advantages of being wide in material source, convenient to process, simple in use, excellent in processing effect and relatively in low cost, is durable, has a good using effect and is more economical and practical compared with other fishing methods, and achieves a favorable economical effect.

Description

The rotary hook type bar dart that breaks

Technical field

The utility model relates to the refloating operation utensil of the disconnected bar drill tool (drilling rod+drill bit) of a kind of drilled pile pore-forming drill, especially a kind of refloating operation utensil that adapts to leave after the disconnected bar of drilling tool complete or the remaining flange of part.

Background technology

Drilled pile pore-forming drill in pile foundation pore-forming process, due to various uncertain factors can cause drilling tool (drilling rod+drill bit) bolt be sheared because torsion is excessive fracture fall into hole at the bottom of.Ensureing under the prerequisite that hole wall quality is stable, first-selected processing scheme generally can salvage leaving drilling tool complete or the remaining flange of part after disconnected bar, after repairing, continue to use, as much as possible evade the disconnected tool accident treatment means of employing is wasted time and energy, expense is huge " drilling tool is pounded in backfill boring punching ", the accident follow-up pore-forming work of holing is proceeded as early as possible, at utmost to reduce the engineering economy loss causing in accident hole." rotary hook type dart " is exactly one of key means addressing this problem, and domestic project is mainly " steel cable czochralski method ", " drilling tool method is pounded in backfill boring punching " etc. to the conventional Refloatation method of disconnected bar drill tool at present.Wherein " steel cable czochralski method ": be to adopt crane or rig elevator that steel cable movable steel noose circle is transferred to disconnected bar drill tool place at the bottom of hole, constantly horizontal and vertical is adjusted cable wire position, treat that steel cable end cable wire lasso packs into the drilling rod at disconnected tool top, now crane or rig slowly lift cable wire, make to slide on cable wire lasso the complete or remaining flange of drilling rod and tighten up, then crane or rig elevator adopt the high-power steel cable that repeatedly lifts, and the bar drill tool that will break is promoted out boring, and accident treatment is complete.Although this processing method is simple, also has accident treatment defect: the one, because of hole bottom slurry buoyancy is large or reaming situation under the crooked reason of shelving hole wall of drilling tool, flexible cable snare is difficult to entangle disconnected tool drilling rod; The 2nd, because disconnected bar drill tool mixes with mud at the bottom of hole, produce absorption affinity at the bottom of huge drill bit bore, in a lot of situations, cable wire to the steel rope breaking that has entangled disconnected tool also cannot lift the tool that breaks to portal, directly cause processing scheme failure, therefore the disconnected bar drilling tool accident success rate of " steel cable czochralski method " processing is very low, so that delays the duration, indirectly causes tremendous economic loss." backfill boring punching pound drilling tool method ": be to portal with the bar drill tool top rod lifting of first breaking of rig elevator, again with piece stone or gravelly soil backfill boring hole, then utilize heavy drill hammer, along former stake position, disconnected bar drill tool is rushed to Accident Handling Method broken and extrusion cavities position, although this method accident treatment is effective, also there are easy reaming, construction cost is high and the duration is grown shortcoming.The utility model is the disconnected bar dart of rotary hook type, full steel structure, the steel such as drilling rod or steel plate that use in common engineering can be served as raw material, source of drawing material is extensive, processing method is all the conventional cutting of steel work in engineering, welding waits conventional machining technique, correlation engineering project not only processing and manufacturing quickly and easily goes out utensil, and directly utilize rig self power will break bar drill tool salvage portal, be badly in need of to meet engineering, and as long as changing draw-in groove groove width size under the constant prerequisite of other structures, fisher can adapt to the disconnected bar drill tool accident conditions of the multiple loading of different size level, fishing success ratio is high, relatively adopt " steel cable lifts ", accident treatment methods such as " drilling tool are pounded in backfill boring punching ", method is simple, fast effectively, it is the fisher of the disconnected bar drill tool engineering accident of a kind of economical and practical processing.

Summary of the invention

The purpose of this utility model is to provide a kind of rotary hook type bar dart that breaks, according to the conventional drilling rod of existing disconnected bar drill tool and flange specification, in drilled pile pore-forming accident conditions, provide one can adapt to plurality of specifications size and loading, salvages the rotary hook type the portalling bar dart that breaks by leaving the disconnected bar drill tool of the complete or remaining flange of part, avoiding processing disconnected bar drilling tool accident success rate because of above-mentioned conventional Refloatation method lowly delays the duration and causes the deficiency of the unnecessary economic loss of engineering, meeting drilled pile engineering accident processes quality, duration, easy and simple to handle, with economical and practical requirement.

The technical solution of the utility model is: a kind of rotary hook type bar dart that breaks, this fisher comprises drilling rod, the upper lower flange of drill rod end welding, lower flange revolves hook blade with welding with it, lower flange and revolve and be provided with circular arc draw-in groove between hook blade, draw-in groove is wide and be slightly larger than disconnected bar drill tool drill pipe diameter to draw-in groove root groove width size from draw-in groove entrance, and draw-in groove entrance outside dimension slightly amplifies and is horn mouth form, is provided with the reinforced piece of putting more energy between upper lower flange and drilling rod junction.

The utility model has the advantage of: material source is extensive: adopt engineering now to form with drilling rod and ordinary steel Plate Welding, can buy and also can process with the surplus material using in engineering in market; Easy to process: processing adopts the conventional processing methods such as common cutting, oxygen leather, arc welding, field fabrication, processing is quick, meets engineering anxious; Use simple: fisher adopt with drilling rod between the identical flange of connected mode be connected with drilling rod, utilize the salvaging of rig self power; Treatment effect is good: fisher steel work, and structure body is firm, and what can adapt to multiple load, plurality of specifications drilling rod size falls to bore accident conditions, and fishing success ratio is high; Lower cost: durable in use, the good and more economical practicality of other overshot results of use relatively, economic effect is good.

Brief description of the drawings

Fig. 1 is the disconnected bar dart structural representation of the utility model rotary hook type.

Detailed description of the invention

The disconnected bar dart of a kind of rotary hook type, this fisher by with the certain length of disconnected bar drill tool same size model, drilling rod 2 and the certain thickness of bringing lower flange 1,6, have with the adapt steel plate type of circular arc draw-in groove 4 of disconnected bar drill tool (drilling rod+drill bit) drill pipe diameter size and revolve the steel structure body that hook blade 8 is welded, draw-in groove 4 is wide and be slightly larger than disconnected bar drill tool drill pipe diameter to draw-in groove root 3 groove width sizes from draw-in groove entrance 7, draw-in groove entrance 7 outside dimensions slightly amplify and are horn mouth form, revolve hook blade 8 and the drilling rod 2 use piece 5 of putting more energy into and strengthen.While processing the disconnected bar drill tool of boring, first fisher upper flange plate 1 drilling rod normal with pore-forming drill is connected, transfer gradually to disconnected bar drill tool top flange dish (or remaining flange) or its underpart joint at the bottom of hole and there is slightly lower of flange position, start Rotary table for drilling machine rotation fisher, the bar drill tool drilling rod that will break slowly screws in draw-in groove root 3 by draw-in groove entrance 7, hook disconnected bar flange (or incomplete flange), stop rig rotation, slowly promote fisher, treat elevator load, stop promoting and stablize this state fisher number minute, then slowly promote rig master winch, feel to load when painstaking until rig, stop promoting, now start after Rotary table for drilling machine is rotated counterclockwise several circles and promote again master winch, as elevator is obviously loaded and promotes smoothly, illustrate that fisher hooks disconnected bar drill tool and breaks away from hole bottom slurry absorption affinity, can continue to promote until disconnected bar drill tool only goes out aperture, as the excessive lifting difficulty of loading, illustrate that disconnected bar drill tool fails to be completely free of mud absorption or the tool that breaks because tilting to have certain structure to be stuck in hole wall, at this moment, should slightly descend releasing hoister and continue to be rotated counterclockwise at a slow speed rotating disk, treat that turntable rotation is normal, stop rotating disk, only start elevator, lifting process can be up and down reciprocatingly, to overcome all kinds of rising resistances in hole, until will break, bar drill tool is only lifted out aperture, completes disconnected bar fishing jobs.

Claims (1)

1. the disconnected bar dart of rotary hook type, it is characterized in that: this fisher comprises drilling rod (2), the upper lower flange (1 of drilling rod (2) end welding, 6), lower flange (6) revolves hook blade (8) with welding with it, lower flange (6) and revolve and be provided with circular arc draw-in groove (4) between hook blade (8), draw-in groove (4) is wide and be slightly larger than disconnected bar drill tool drill pipe diameter to draw-in groove root (3) groove width size from draw-in groove entrance (7), draw-in groove entrance (7) outside dimension slightly amplifies and is horn mouth form, upper lower flange (1, 6) and between drilling rod (2) junction be provided with the reinforced piece of putting more energy into (5).