CN201391249Y

CN201391249Y - Dual-drive low-spiral drill rod

Info

Publication number: CN201391249Y
Application number: CN200920088879U
Authority: CN
Inventors: 孙玉宁; 王永龙
Original assignee: Henan University of Technology
Current assignee: Henan University of Technology
Priority date: 2009-03-10
Filing date: 2009-03-10
Publication date: 2010-01-27
Anticipated expiration: 2019-03-10

Abstract

The utility model discloses a dual-drive low-spiral drill rod which comprises a hollow drill rod body. The axial cylindrical surface of the drill rod body is provided with one or more spiral raised ribs with the cross section in round shape, triangle or quadrangle. The width of the raised rib is between 3mm and 25mm and the height between 3mm and 25mm also. A spiral convey groove is formed between the adjacent raised ribs; one end of the drill rod body is provided with a hollow connection rod and the other end is provided with a connection hole which is matched with the connection rod; the processing method includes hot forming method, rolling method or squeezing method. The utility model has reasonable design, simple structure, easy processing and manufacture, low cost, high security and reliability, good dreg discharge performance and large drilling depth, the intensity and rigidness of the drill rod are upgraded greatly, and the work efficiency and production benefit can be improved when the drill rod is used for coal seam drilling.

Description

Double-power low spiral auger

Technical field

The utility model belongs to coal mine gas extraction borehole technical field, relates in particular to a kind of used double-power low spiral auger of coal bed drilling construction that is used for.

Background technology

In process of coal mining, to high gas layer and coal and gas is projecting coal bed need carry out extraction to the gas in the coal seam before mining, the extraction borehole of need in the coal seam, constructing of the gas in the extraction coal seam.The drilling rod that is used for the coal bed drilling construction at present mainly contains two kinds, is the light face drilling rod of deslagging power and the helical blade drilling rod that leans on rig self power deslagging with fluid (air-flow or current) promptly.Make when using up the face drilling rod at " brill cave " (the long-range accurate packed type cave with the boring theoretical diameter of the diameter that factor such as this pressure of the process of drilling invar, geostatic stress, drilling rod perturbed force, coal body are soft causes jointly) district's slagging channel and be prone to obstruction, and then stick of tool occurs, lose phenomenons such as brill, be difficult to realize deep well drilling; Excessive when using the helical blade drilling rod because of the power that consumes rig, be prone to phenomenons such as inhaling brill, bit freezing, be difficult to realize deep well drilling.Chinese patent application number is to disclose a kind of outburst coal seam hole temperature-reducing drilling tool and drilling method thereof in 200610111830.7, described drilling rod has carried out producing and being applied to the coal seam creeping into, in application process, find, this drilling rod can increase substantially drilling depth really, but because of its structure is to make spiral conveying groove at seamless steel pipe surface car, this kind structure has reduced the bulk strength of drilling rod, simultaneously waste material; Be to adopt the method for turned bolt groove can not form the spiral conveying groove of depth desired on the other hand, carry the cinder function thereby influence spiral fluted.At present, drilling rod processing method commonly used has surface soldered moulding, surface heat to melt the technology of being coated with etc., and these processing methods are simple, but the drilling rod that processes reduces on intensity greatly, the situation of damage in work progress, often occurs, influence operating efficiency and productivity effect.

The utility model content

The utility model is in order to solve deficiency of the prior art, provide a kind of based on the fluid dynamic deslagging, with the double-power low spiral auger of rig rotary power for assisting, this drilling rod is taken into account the advantage of light face drilling rod and helical blade drilling rod, overcome the shortcoming of light face drilling rod and helical blade drilling rod, realize double dynamical deslagging aspect the deslagging power, having better the function that overcomes " brill cave " harm.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is: double-power low spiral auger, comprise hollow drilling rod body, described drilling rod axon is provided with spiral helicine fin bar to the face of cylinder, and spiral helicine fin bar cross sectional shape is circle, triangle or quadrangle.

Described spiral helicine fin bar is provided with one or more, and according to the difference of face of cylinder diameter, fin bar width is between 4mm～25mm, and height forms spiral conveying groove between the adjacent lugs bar between 1mm～10mm.

Described drilling rod body one end is provided with hollow connecting rod, and the other end is provided with the connecting hole that can cooperate with this connecting rod.

Described hollow connecting rod is for having certain taper or being cylindric, and its external surface is provided with external screw thread, and the connecting hole inner surface is provided with internal thread.

Described hollow connecting rod is along the internal plug seat that is interlinked to the outside in the side in cross section is provided with, and connecting hole space correspondence position is provided with the outer jack that cooperates pin to peg graft with the internal plug seat of connecting rod.

Adopt said structure, the fin bar can improve the bulk strength of drilling rod, its cross section is circle, triangle or quadrangle, the physical dimension of fin bar helps the clamping of rig, improved the heat radiation of the drill effect and the drilling rod self in coal seam, fin bar radius of gyration is easy to creep into less than more than the drill bit radius of gyration 10mm; The formation of spiral conveying groove, provide enough slagging channel spaces to fluid, give full play to the fluid deslagging function of drilling rod, improved fluid dynamic deslagging space, more help getting rid of the boring obstruction that " brill cave " forms, reduce the consumption of drilling rod, weaken the mechanical deslagging function of drilling rod the rig rotary power, prevent to inhale and bore the phenomenon generation, be convenient to the outside smooth delivery of power of cinder; Drilling rod body two ends are respectively equipped with suitable hollow connecting rod and connecting hole, extension arm body so easily; Connecting rod by a drilling rod body (directly link connect or gas thread is connected) the extension arm length that is threaded with the connecting hole of another root drilling rod body, reliable convenient; According to the processing technology difference of drilling rod, also can peg graft extension arm length by the plug-in type pin, realize the counter-rotating of drilling rod; The utility model is reasonable in design, simple in structure, be easy to processing and fabricating, with low cost, safe and reliable, the deslagging performance is good, drilling depth is dark, the strength and stiffness of drilling rod have fully been strengthened, use this drilling rod to carry out coal bed drilling, can increase work efficiency and productivity effect.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment one;

Fig. 2 is the structural representation of the utility model embodiment two;

Fig. 3 is the A-A sectional view in the middle of Fig. 1 and Fig. 2;

Fig. 4 is the B-B sectional view of Fig. 2;

Fig. 5 is the initial configuration schematic diagram of the utility model body of rod moulding;

Fig. 6 is the C-C sectional view of Fig. 5;

Fig. 7 is the assembling drawing of tubing to be extruded and central steel shaft;

Fig. 8 is the axial section of particular manufacturing craft in the middle of the extrusion modling processing method.

The specific embodiment

Embodiment one: as shown in figures 1 and 3, double-power low spiral auger of the present utility model, comprise hollow drilling rod body 1, the endoporus 7 of drilling rod body 1 can be used for by high pressure draught or current, drilling rod body 1 axial cylindrical face is provided with spiral helicine fin bar 2, fin bar 2 cross sectional shapes are trapezoidal, this cross section also can be rectangle, triangle, shapes such as quadrangle, spiral helicine fin bar 2 is provided with one or more, fin bar 2 width are between 3mm～25mm, height is between 3mm～25mm, form spiral conveying groove 3 between the adjacent lugs bar 2, the rotation that spiral conveying groove 3 can be in the process of drilling drives drilling rod with rig be carried cinder to the outside, drilling rod body 1 one ends are provided with the hollow connecting rod 4 with certain taper, the other end be provided with can with the connecting hole 5 of these hollow connecting rod 4 threaded.When extension arm, can be with the connecting rod 4 of a drilling rod and connecting hole 5 threaded of another root drilling rod.Certainly, hollow connecting rod 4 and connecting hole 5 also can be cylindrical shape, directly link to connect, and this is a known technology, repeats no more.

Embodiment two: as Fig. 2, Fig. 3 and shown in Figure 4, with embodiment one different being, hollow connecting rod 4 cross sectional shapes can be designed to polygon, the limit number can be according to designing with regard to practical situations, Fig. 4 is a kind of hexagonal cross-sectional shape wherein, along the internal plug seat 10 that is interlinked to the outside in the side in cross section is provided with, the installation correspondence position of connecting hole 5 is provided with the outer jack 11 that cooperates pin to peg graft with internal plug seat on the hollow connecting rod 4.When extension arm, the connecting rod 4 of a drilling rod can be pegged graft with the connecting hole 5 of another root drilling rod cooperates, and uses pin or bolt to penetrate in outer jack 11 and the internal plug seat 10 then and fixedlys connected.

The processing method embodiment one of the body of rod: adopt the thermoforming processing method, may further comprise the steps:

(1), is arranged with the body of rod 21 (as Fig. 5 and Fig. 6) of two ribs 20 at first steel pipe rolling being become on the circumferential surface axially.

(2), the tubing that step 1 is formed carries out the blanking scale according to the length of drilling rod to be processed, put it into the high-temperature heating pipe of sufficient length then, design corresponding anchor clamps simultaneously, these anchor clamps can be realized the two ends of the needs heating body of rod 21 are gripped, and also can realize rotating the certain moment of torsion of loading simultaneously.

(3), heat by the high-temperature heating pipe rib shape body of rod 21, after reaching uniform temperature, the body of rod 21 is rotated reverses, can take two ends slowly to rotate along different directions, also can take an end to fix, the mode of other end rotation is till the surface of the body of rod 21 rib vertically forms uniform spiral rib.

(4), finish above-mentioned steps after, take off the body of rod 21 and slowly dispel the heat, the stripping thermal stress or is heat-treated, and improves case hardness.

The processing method embodiment two of the body of rod: adopt roll extrusion, extruding method,, may further comprise the steps referring to Fig. 7 and Fig. 8:

(1), at first choose the seamless steel pipe of certain size, select the thicker seamless steel pipe of wall thickness to carry out roll extrusion, extrusion modling usually, to remedy the body of rod stress raisers phenomenon that body of rod distortion causes.

(2), required tubing is carried out the blanking scale according to the length of drilling rod to be processed, design hardness and intensity are much larger than the central steel shaft 22 of this tubing, and can pass along the tubing center that needs roll forming, its fit clearance will be controlled between 0.1mm～0.3mm, prevent that in the roll extrusion process, the distortion of the body of rod 21 is excessive.

(3), according to the size of pipe and tubing of want roll extrusion, the cylindrical mold 23 of design specialized, and one or more spiral ridge of the with good grounds design of inner surface cloth, this mould 23 adopts high temperature resistant and intensity and the bigger mould steel of hardness are made.

(4), the tubing to be processed that is installed with central steel shaft 22 is fixed on lathe, the high-temperature heating pipe that puts it into sufficient length then heats, meanwhile, above-mentioned particular manufacturing craft 23 1 ends are fixed, and can rotate, and manage with the central axis of tubing to be processed and to overlap, can be along stable the moving of axis direction, and can rotate, guarantee to load a certain size axial force simultaneously at an end of mould 23, after high-temperature heating pipe is treated extrude tubes and is heated to certain hour, remove high-temperature heating pipe, this particular manufacturing craft 23 is pressed through along the end rotation of processing tubing, and the mode by extruding has formed spiral ridge on smooth pipe material surface like this, will insert the central steel shaft 22 of tubing at last and extract out.

In addition, when the processing and fabricating drilling rod, direction of rotation was consistent when the hand of spiral that guarantee spiral helicine fin bar was normally holed with rig.

Adopt double-power low spiral auger in use, easily form two slagging channels in " brill cave ": form fluid (air-flow or current) slagging channel on " brill cave " top, around the mechanical slagging channel of drilling rod formation from the rig rotary power, article two, slagging channel interacts, and helps to overcome or less " brill cave " harm to drilling.Under normal deslagging situation, because adopted double dynamical deslagging mode, make the deslagging speed and the efficient of drilling rod be improved, can improve the efficient of drilling; In " brill cave " district, when the fluid slagging channel was not smooth, low helical structure was consuming under the less situation of rig power and the fluid slagging channel can dredged, and then overcomes or reduce the harm in " brill cave ".

Claims

1, double-power low spiral auger comprises hollow drilling rod body, it is characterized in that: described drilling rod axon is provided with spiral helicine fin bar to the face of cylinder, and spiral helicine fin bar cross sectional shape is circle, triangle or quadrangle.

2, double-power low spiral auger according to claim 1, it is characterized in that: described spiral helicine fin bar is provided with one or more, difference according to face of cylinder diameter, fin bar width is between 4mm～25mm, height forms spiral conveying groove between the adjacent lugs bar between 1mm～10mm.

3, double-power low spiral auger according to claim 1 and 2 is characterized in that: described drilling rod body one end is provided with hollow connecting rod, and the other end is provided with the connecting hole that can cooperate with this connecting rod.

4, double-power low spiral auger according to claim 3 is characterized in that: described hollow connecting rod is for having certain taper or being cylindric, and its external surface is provided with external screw thread, and the connecting hole inner surface is provided with internal thread.

5, double-power low spiral auger according to claim 3, it is characterized in that: described hollow connecting rod is along the internal plug seat that is interlinked to the outside in the side in cross section is provided with, and connecting hole space correspondence position is provided with the outer jack that cooperates pin to peg graft with the internal plug seat of connecting rod.