CN2619041Y - Rotary disc rotation guide drilling tool - Google Patents

Abstract

A rotary table rotary steering drilling tool is composed of a remote control clutch, a deflecting device and a flexible drill pipe; the flexible drill pipe is composed of a plurality of flexible drill pipe units in serial connection, every flexible drill pipe unit is articulated with an inner ball button by an outer ball button; the remote control clutch has a mandrel, the outside thereof is fixedly provided with a tile button, the outer side of the tile button is provided with an elastic righting strip, the parting and reunions of the tile button and the mandrel can be controller by upward lifting, rotating, laying down actions of the mandrel; the mandrel is inserted by a multi-functional short section, the lower end of the multi-functional short section is screwed with the flexible drill pipe, the flexible drill pipe is screwed with a bit, the bit is combined with a guide ring, the outside of the flexible drill pipe unit is arrange with a guide cylinder, the middle part is arrange with a torsion prevention limiting plate. The utility model can drill a vertical well, a directional well, a cluster well, an extended reach well, a horizontal well with a radius of more than 30 meters and so on, in particular a super short radial horizontal well with a short curvature radius or a super short radial horizontal well whose producing formation drilling curvature radius is less than 10 meters, is suitable for repeatedly drilling old wells in middle-late stage of oilfield development, and can improve production.

Description

The rotating disk rotary steering drilling tool

Technical field

The utility model relates to for example drilling tool of oil of recovery of subterranean fluid.

Background technology

The rotary steerable drilling technology means the long eyes of going up of rotary drilling, can change well drilling direction, Controlling Borehole Trajectory at any time on ground; Simultaneously drilling process is become bit life less than not pulling out of hole, rotary drilling process is continuously raised the efficiency.

Existing rotary drilling drilling tool only is applicable to beats straight well, or by means of downhole motor can dig a directional well, cluster well, special drilling wells such as horizontal well more than the radius 30m, and the life-span of mud motor short (about 100 hours), strict to drilling fluid, influence the maximum performance of bit hydraulic horsepower, guarantor etc. can't be repaiied in the power drilling tool scene, all makes troubles to drilling well, these problems are perplexing spudder author always, and therefore existing rotary drilling instrument is anxious to be waited to improve and develop.

Summary of the invention

The purpose of this utility model provides a kind of rotating disk rotary steering drilling tool, be equipped with measuring apparatus, it can beat straight well, directional well, cluster well, extended reach well, the horizontal well of radius more than 30 meters etc., particularly can beat short-radius and payzone and bore radius of curvature less than the super short radial horizontal well within the 10m.The old well that also is specially adapted to the oil field middle and later periods heavily bores; Improve output, improve the final production yield rate in oil field, reduce operating cost, and be convenient to maintenance.

The purpose of this utility model is achieved in that

A kind of rotating disk rotary steering drilling tool, by control clutch far away, kick-off device and flex-stem three parts are formed, and are serially connected between conventional drill collar and the drill bit and implement drillng operation;

1. flex-stem is formed by some flex-stems unit serial connection, each flex-stem unit with hinged and can circumferential skewing certain angle, being configured to of each flex-stem unit: ectosphere key and endosphere key are hinged with bulb, this bulb also is the pattern chain in free crack to peg graft with cylindrical, in addition, the endosphere key respectively has endoporus and communicates, at this endoporus joint inner seal ring is housed, this inner seal ring magnetizes between ectosphere key internal thread hole end face and endosphere key endoporus concave station; On the periphery of ectosphere key, be set with stile, the steel ball and the both sides O type ring that have plug to block on the bonding surface of this periphery and this centralizer, form alignment bearing, bulb key has not held external screw thread can be connected in series mutually with corresponding each flex-stem of outer bulb key internal thread in this;

2. far control clutch one axle is arranged, the peg graft hole pipe of multi-functional pipe nipple and seal of its endoporus with O type ring, this axle cylindrical is equipped with by plug, the thrust bearing that steel ball and both sides sealing ring are formed, axle is set in the shell, this shell is a hollow bushing, its middle part is fixed with the tile key with screw, this tile key is laterally curved, its inner headed face has " Ji " font groove on evagination " Ji " font double wedge and the axle relevant position arrow-shaped bumping surface corresponding, there are four elasticity righting strips of circumference in equal parts in this tile key outside, this outside curved projection in elasticity righting strip middle part grows shell upper end face 6-8mm, and this elasticity is picked out positive bar lower end and is fixed in shell with screw, its upper end is slidingly connected in the dovetail groove of shell, by carrying on the axle, reverse, transfer the clutch of action control tile key and axle;

3. kick-off device: portion's endoporus of axle has outer six sides of the end cylindrical of interior six sides and multi-functional pipe nipple to peg graft, and by two groups of screw plugs, the thrust bearing on steel ball and two O type ring composition kick-off device tops, the lower end of this multi-functional pipe nipple is connected with the internal thread of flex-stem with external screw thread, a unit of the foot of this flex-stem is spirally connected with screw thread and bit adapter, this bit adapter is with by steel ball, the following thrust bearing that plug is formed combines with guide ring, be set with every the sand ring between this guide ring and the ectosphere key, the outside of this each mutually hinged flex-stem unit has guide cylinder top to be suspended on the shell with four pins: this guide cylinder bottom with four dowel fixes in guide ring, there is the cross cut seam of directional curvature the same side of this guide cylinder and alleviates the longitudinal cutting seam that stress is concentrated, there is aperture at the longitudinal joint two ends, slot is communicated with to become " worker " font in length and breadth, surround guide cylinder the same side to 240 °, be provided with the anti-banking stop of turning round in the middle; The clutch key tooth separates during deflecting, and outside shell and guide cylinder do not rotate, when turning round orientation and hold angle and creep into, and the engagement of clutch key tooth, shell and guide cylinder rotate simultaneously, and described guide ring has inclination alpha ° identical with the directional curvature direction of guide cylinder.

The utility model has following actively useful effect:

This instrument is divided into according to function: clutch, whipstock, flex-stem, their common feature is that rotating part and rotating part are not all arranged, and rotating part is interior, rotating part is not outside, inside and outside all make bearing with rolling steel balls, drilling fluid is carried in the inside center hole, and outside annular space with the borehole wall is returned drilling fluid.This instrument bores the above well of radius 〉=30m is only used 1-2 unit in guide cylinder flex-stem, during drilling well radius＜30m (build angle rate 〉=3 °/more than the m) except that in guide cylinder with a small amount of flex-stem, also need adjunction and the flex-stem that creeps into exceptional well section respective length between conventional drilling tool and rotary steerable tool.

This rotary steering drilling tool has following two kinds of duties:

(1) deflecting state, clutch is in released state, be that tile key on the shell is on keyway on the axle, add the pressure of the drill this moment at first makes four righting strip diameters swell by last thrust bearing, tightly paste extremely on the borehole wall, so the shell of whole outside and guide cylinder all can not rotate, the pressure of the drill also makes the guide cylinder directional curvature towards the anti-banking stop of turning round; And inner axle drives multi-functional pipe nipple, flex-stem, bit adapter and drill bit, carries out deflecting and creeps into.

(2) turn round orientation or hold angle state: this moment, clutch was in bonding state.Promptly carry, reverse, put by the driller, the drill flute of axle and the key tooth on the shell can mesh together, and the inside and outside is rotated simultaneously, if only turn on the needed orientation, clutch separation is opened, crept into, this cries and turn round the orientation, if inside and outsidely rotate pressurization simultaneously and creep into and just be called hold angle and creep into.

Above design feature decision the utlity model has following advantage:

1. this rotary steering drilling tool is equipped with measuring apparatus and can finishes well type miscellaneous, comprises conventional straight well, tiltedly straight well, directional well, cluster well, extended reach well, and short-radius, ultrashort radius of curvature well.

2. this instrument is applicable to various rig, and applicability is strong, is convenient to promote.

3. this instrument is specially adapted to old well of oil field middle and later periods and heavily bores, and utilizes old well that payzone is heavily bored the ultra-short radius level also, avoids water awl gas coning and former contaminated plug.At utmost increase the payzone exposed surface, drilling cost is reduced, output is multiplied, also improved the oil field ultimate recovery.

4. the guide ring of this instrument has inclination alpha ° identical with the directional curvature direction of guide cylinder, makes deflecting that double assurance be arranged.

Description of drawings

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

Fig. 2 is the B-B sectional view of Fig. 1;

Fig. 3 is the C-C sectional view of Fig. 1;

Fig. 4 is the D-D sectional view of Fig. 1;

Fig. 5 is the structural representation of the flex-stem unit among Fig. 1;

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

Fig. 7 is that the axle lower surface among Fig. 1 is launched schematic diagram;

Fig. 8 is the internal view of the tile key among Fig. 1;

Fig. 9 is the lateral view of Fig. 8;

Figure 10 is the structural representation of the guide cylinder among Fig. 1, is sectional view.

The specific embodiment

For ease of with the aid of pictures, provide accompanying drawing number as follows:

1. stile 2. ectosphere keys 3. inner seal rings

4. endosphere key 5. is every sand ring 6.O type ring

7. plug 8. steel balls 9. axles

901. carry the dead point in 903. engagements of arrow-shaped projection 902. keyways

904. proposing dead point 905. engagement on unsnaping reverses dead point 906. and unsnaps and reverse the dead point

907. bottom bulge loop 908. annular grooves 909. annular grooves

10. thrust bearing 11. shells 12. elasticity righting strips

13. tile key 131 " Ji " font double wedge 132. screws

14. anti-banking stop 15. multi-functional pipe nipple 16. pins of turning round

17. shelves ring 18. guide cylinders

181. shelves annular groove 182. prevents turning round spacing film perforation 183. pin holes

184. cross cut stitches 185. longitudinal cuttings and stitches 186. apertures

19. pin 20. guide rings 21. bit adapters

22.O shape is encircled 23. plugs, 24. steel balls

25.O type ring 26. sunk screw 27.O type rings

28.O type ring 29. plugs 30. steel balls

31. plug 32. steel balls 33. directional bonds

L. operating range

The utility model is described in further detail below in conjunction with accompanying drawing: Fig. 1 is overall structure signal of the present utility model, it divides upward hypomere, epimere is a clutch, hypomere is a whipstock, clutch is by axle 9, thrust bearing 10, shell 11 3 parts are formed, internal thread be spirally connected non-magnetic drilling tool and inclinometer seat are arranged at axle top, and the outside is installed with by O type ring 22, plug 23, the thrust bearing 10 that steel ball 24 is formed is used for the deflecting pressurization, axle 9 lower surface are processed into arrow-shaped projection (see figure 7) and upwards point to, it is shrouding handling and is reversing enterable keyway, and foot has bulge loop outward, dress O type ring sealing axle 9 and shell 11 on the bulge loop; In have interior six sides to match transfer torque with outer six sides of multi-functional pipe nipple 15.The shell middle part of clutch embeds tile key 13 (see figure 8)s is installed, and three strip teeth of its inner surface projection are as simplified Hanzi " Ji " word.The structure of this specially design has just been created necessary condition for the work of clutch.Also inlaying that fixing top has that dovetail groove slides around the shell, the bottom is with the fixing righting strip 12 of screw 26, more than is the structure of clutch.Fig. 2 and Fig. 3 be among Fig. 1 clutch in the cross-sectional view of B-B and C-C position, demonstrate three teeth of the tile key on the shell respectively, with three grooves on the axle, it two is in released state, during the pressurization rotary drilling, has only four righting strip pressurizeds to expand outward, paste extremely on the borehole wall, shell can not be rotated, and axle is freely rotated, and at this moment deflecting creeps into.If on worry axle 〉=operating range L, again the right-hand rotation 〉=180 °, then transfer≤operating range L, just realize the engagement of tile key tooth and axle keyway, at this moment righting strip restores to the original state because of pressurized not leaves the borehole wall, and axle and shell are rotated simultaneously, so just can turn round the orientation or hold angle has crept into.

Multi-functional pipe nipple 15 is ties of upper and lower section connection, the assurance of work; Its top O type ring 25 is that not short circuit of low-pressure drilling liquid key is returned out in internal high pressure drilling fluid and outside.Middle part six side's transfer torques, body encircles 28 by O shape, plug 29, steel ball 30 constitutes the top thrust bearing of kick-off devices; The external screw thread of lower end is connecting the inner flexible drilling rod unit ectosphere key internal thread of hypomere whipstock, through 1-2 flex-stem unit, connect bit adapter and drill bit (not drawing) bottom, the outside of whipstock is directed to tube 18 and surrounds, guide cylinder top is suspended on the clutch outer member 11 by four pins 16, shelves ring 17 can guarantee that the not outside play of pin comes off, the guide cylinder bottom is hanging the guide ring 20 at α ° of inclination angle with same pin 19, its inner two plugs 31 and two groups of following thrust bearings that steel ball 32 is formed, make bit adapter 21 same tilt alpha ° angles, and rotation flexibly.On guide cylinder 18 cylindrical shells as required the different designs of angle of bend the slot in length and breadth of unequal number amount is arranged, cross cut stitches circumferential about 240 ° of 184 envelopes, the longitudinal cutting seam 185 that transverse joint two is ined succession isometric, longitudinal cutting seam two ends are small sircle holes 186, (see figure 10), slot and aperture interconnect in length and breadth, form " worker " font, its mutual quantitative relation horizontal stroke 1, vertical 2, hole 4, each cross cut seam centre is being settled the anti-banking stop 14 of turning round of symmetry, and it is dead in a side weld of slot respectively, another side leaves the distance wide with slot, so that the slit closes up stressedly simultaneously during the pressurized directional curvature, but banking stop and cylindrical shell nestle up in the horizontal, orientation unanimity up and down when guaranteeing flexion torsion.The aspect is prevented turning round banking stop and is not also allowed guide cylinder crooked round about in addition.Fig. 4 is the profile of Fig. 1 at the D-D place.It is clear has seen that guide cylinder is cut off 2/3 and the anti-banking stop 14 of turning round, and inner ring is the inner seal ring 3 of inside and outside ball key.Middle ring is the key tooth that interior ectosphere key is meshed, and its quantity has 8-12.The overall structure of epimere clutch and whereabouts whipstock so far has been described.Figure 5 shows that a flex-stem unit, main body is endosphere key 4 and ectosphere key 2, earlier the endosphere outer round bur female thread portion of packing into, be inserted in lower cover from endosphere drillstock part screw thread again, then extremely during assembling according to the figure weldering, next with on the interior extremely outside ring key 2,4 of inner seal ring difference glue, adorn two O shape rings 6 again, put alignment bearing, drop into steel ball 8 respectively, block plug 7, last suit is every sand ring 5.The A-A that Figure 6 shows that Fig. 5 analyses and observe, the mechanism of ectosphere transfer torque in showing.Figure 7 shows that the expansion signal of clutch axle lower external face, be convenient to understand the connotation of clutch operating.Fig. 8, Figure 9 shows that the shape of tile key 13 on the shell, shown in Figure 10 then is guide cylinder 18 body shape, can clearly see top pin hole, slot in length and breadth, and aperture and anti-ly turn round the banking stop present position is so that understand the guide cylinder operating principle.

Diameter swelled when the elasticity righting strip 12 of this instrument was subjected to the pressure of the drill, and being close to can only glide on the borehole wall can not rotate, and axle 9 is thrown off with shell 11, this moment clutch separation, but deflecting, and by carrying drilling tool on the ground, axle 9 is up, the tile key is descending along the arrow-shaped projection of axle, terminate in engagement top dead-centre 903, then turning round engagement to the right reverses dead point 905, transfers axle again groove is meshed with " Ji " font tooth, rotation simultaneously inside and outside this moment can be turned round the orientation or hold angle creeps into.Declutch carries on being equally-and the right side is turned round-is transferred, changes mutually.

Claims (1)

1. rotating disk rotary steering drilling tool, by control clutch far away, kick-off device and flex-stem three parts are formed, and are serially connected between conventional drill collar and the drill bit and implement drillng operation, it is characterized in that:

1. flex-stem is formed by some flex-stems unit serial connection, each flex-stem unit with hinged and can circumferential skewing certain angle, being configured to of each flex-stem unit: ectosphere key (2) is hinged with bulb with endosphere key (4), this bulb also is the pattern chain in free crack to peg graft with cylindrical, in addition, the endosphere key respectively has endoporus and communicates, at this endoporus joint inner seal ring (3) is housed, this inner seal ring magnetizes between ectosphere key internal thread hole end face and endosphere key endoporus concave station: be set with stile (1) on the periphery of ectosphere key, the steel ball (8) and the both sides O type rings (6) that have plug (7) to block on the bonding surface of this periphery and this centralizer, form alignment bearing, bulb key has not held external screw thread can be connected in series mutually with corresponding each flex-stem of outer bulb key internal thread in this;

2. far control clutch one axle (9) is arranged, the peg graft hole pipe of multi-functional pipe nipple (15) and seal of its endoporus with O type ring (25), this axle (9) cylindrical is equipped with by plug (23), the thrust bearing (10) that steel ball (24) and both sides sealing ring (22) are formed, axle (9) is set in the shell (11), this shell (11) is a hollow bushing, its middle part is fixed with tile key (13) with screw, this tile key is laterally curved, its inner headed face has evagination " Ji " font double wedge (131) corresponding with " Ji " font groove (902) on axle (9) relevant position arrow-shaped projection (901) face, there are four elasticity righting strips (12) of circumference in equal parts in this tile key (13) outside, this outside curved projection in elasticity righting strip middle part, grow shell upper end face 6-8mm, this elasticity is picked out positive bar lower end and is fixed in shell (11) with screw, its upper end is slidingly connected in the dovetail groove of shell (11), by carrying on the axle (9), reverse, transfer the clutch of action control tile key (13) and axle (9);

3. kick-off device: portion's endoporus of axle (9) has outer six sides of the end cylindrical of interior six sides and multi-functional pipe nipple (15) to peg graft, and by two groups of screw plugs (29), the thrust bearing on steel ball (30) and two O type ring composition kick-off device tops, the lower end of this multi-functional pipe nipple (15) is connected with the internal thread of flex-stem with external screw thread, a unit of the foot of this flex-stem is spirally connected with screw thread and bit adapter (21), this bit adapter is with by steel ball (32), the following thrust bearing that plug (31) is formed combines with guide ring (20), be set with every sand ring (5) between this guide ring (20) and the ectosphere key (2), the outside of this each mutually hinged flex-stem unit has guide cylinder (18) top to be suspended on the shell (11) with four pins (16); Guide ring (20) is fixed in four pins (19) in this guide cylinder bottom, there is the cross cut seam (184) of directional curvature the same side of this guide cylinder and alleviates the longitudinal cutting seam (185) that stress is concentrated, there is aperture (186) at the longitudinal joint two ends, slot is communicated with to become " worker " font in length and breadth, surround guide cylinder the same side to 240 °, be provided with the anti-banking stop (14) of turning round in the middle; The clutch key tooth separates during deflecting, and outside shell and guide cylinder do not rotate, when turning round orientation and hold angle and creep into, and the engagement of clutch key tooth, shell and guide cylinder rotate simultaneously, and described guide ring (20) has inclination alpha ° identical with the directional curvature direction of guide cylinder (18).

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