阅读说明：本技术 一种径向水平井用自进式喷射钻头 (A kind of radially horizontal well self-advancing type jet bit ) 是由 钟功祥 谢锐 吕志忠 胥卜轩 程柯文 吴陈 于 2019-09-16 设计创作，主要内容包括：本发明涉及一种径向水平井用自进式喷射钻头,主要包括钻头、旋转轴、壳体、涡轮定子、涡轮转子、后部短节、扶正器和后接管,壳体内部装有涡轮系统,壳体置于钻头与扶正器中间,前部通过旋转轴与钻头相连,后部通过后接管与扶正器相连,涡轮转子通过转子螺母和平键键固紧在旋转轴上,旋转轴后部通过滑动轴承套与后部短节相连,扶正器与后接管空套。涡轮系统通过平键传递扭矩给旋转轴,旋转轴带动钻头旋转,形成钻头旋转喷射钻井,提高破岩能力和钻井效率,旋转的钻头起到修饰井壁的作用；通过涡轮系统的流体从壳体上后喷孔喷出产生自进力,推动喷射钻头向前作业；扶正器起到扶正后接管,防止反扭矩的作用,减小钻进过程的摩擦阻力。(The present invention relates to a kind of radially horizontal well self-advancing type jet bits, it mainly include drill bit, rotary shaft, shell, turbine stator, turbine rotor, rear portion pipe nipple, centralizer and rear tube, enclosure interior is equipped with turbine system, shell is placed among drill bit and centralizer, front is connected by rotary shaft with drill bit, rear portion is connected by rear tube with centralizer, turbine rotor is fastened on the rotary shaft by armature nut and flat key key, rotary shaft rear portion is connected by sliding bearing sleeve with rear portion pipe nipple, centralizer and rear tube empty set.Turbine system transfers torque to rotary shaft by flat key, and rotary shaft drives bit, forms bit jet drilling, improves rock breaking capacity and drilling efficiency, and the drill bit of rotation plays the role of modifying the borehole wall；By the fluid of turbine system, rear spray orifice ejection is produced from into power from shell, pushes jet bit operation forward；Centralizer plays the role of righting rear tube, prevents reaction torque, reduces the frictional resistance of drilling process.)

1. a kind of radially horizontal well self-advancing type jet bit mainly includes drill bit (11), bores tooth (12), rotary shaft (22), shell Body (17), turbine stator (6), turbine rotor (7), rear portion pipe nipple (5), centralizer (3) and rear tube (1), it is characterised in that: institute It states equipped with turbine system inside shell (17), shell (17) is placed among drill bit (11) and centralizer (3), and front passes through rotary shaft (22) be connected with drill bit (11), rear portion is connected by rear tube (1) with centralizer (3), turbine rotor (7) pass through armature nut with Two flat keys (8) are fixed tightly on rotary shaft (22), and rotary shaft (22) rear portion passes through sliding bearing sleeve (18) and rear portion pipe nipple (5) phase Even, centralizer (3) and rear tube (1) empty set, front are positioned with circlip (15), and rear is positioned using rear tube (1) boss.

2. a kind of radially horizontal well self-advancing type jet bit according to claim 1, it is characterised in that: the drill bit (11) it is preceding male, cancels front leaf grating and bore tooth, brill tooth (12) distribution on each leaf grating is different and in three leaf gratings Direction is respectively designed a threaded hole and rotary shaft (22) and is fastened, chisel edge design have a center of orifices (23) and three it is oblique Spray orifice (23).

3. a kind of radially horizontal well self-advancing type jet bit according to claim 1, it is characterised in that: the shell (17) internal that four groups of turbine stators (6) and turbine rotor (7) are housed, turbine stator (6) and turbine rotor (7) all circumferentially divide equally ten Six blades；Shell (17) is connect with rear tube (1) by nut, and shell (17) and spacer ring (9) are provided with identical runner, shell (17) rear and front end is respectively provided with drive end bearing bracket (21) and rear end cap (16).

4. a kind of radially horizontal well self-advancing type jet bit according to claim 1, it is characterised in that: the rear portion is short Section (5) center is provided with a centre bore and is provided with a deep hole at center, is uniformly distributed eight around rear portion pipe nipple (5) center Through-hole, the drilling fluid of one third enter rotary shaft (22) through rear portion pipe nipple (5) centre bore and are transmitted to front drill bit (11) by preceding Spray orifice (23) outflow, 2/3rds drilling fluid enter turbine rotor part by eight holes around of rear portion pipe nipple (5) and pass Shell (17) front end is transported to be flowed out by rear spray orifice (20).

5. a kind of radially horizontal well self-advancing type jet bit according to claim 1, it is characterised in that: the centralizer It (3) include a wiper block (4) and two supporting blocks (2), and wiper block (4) and supporting block (3) are provided with identical runner, righting It is connect between block (4) and supporting block (2) by screw, is connected between two supporting blocks by spring (14).

Technical field

The present invention relates to a kind of radially horizontal well self-advancing type jet bits.

Background technique

As China's oil-gas field development enters the middle and later periods, the water content of oil/gas well increases, and the effect of water injection work is increasingly Low, the difficulty of oil-gas mining increases, and stabilized hydrocarbon well production becomes abnormal arduous；In the oil gas of exploitation not yet, operating condition feelings The oil-gas reservoir quantity of condition complexity is more, and exploits the biggish oil and gas reserves of difficulty and occupy very big specific gravity.Currently, radial level Well drilling technology is widely used in the oil gas field difficult with above-mentioned old oil- and gas-field and exploitation, and radially horizontal well technology can be effective Ground reduces the cost payout of oilfield exploitation, saves working sources, improves the yield in oil field, accelerates oilfield exploitation efficiency.With diameter Use to horizontal well drilling technology, there are also the problems in many drilling process are urgently to be resolved for discovery.Wherein bored at present in jet stream There is problem to be solved in head: (1) flow jet flow drill hydraulic pressure deficiency causes rock breaking capacity low and the distribution of drill bit spray orifice leads to broken rock It is in irregular shape, cause front wall friction resistance very big confined jet drill bit from into；(2) spray orifice needs to design before flow jet flow drill Certain distribution rule can just make broken rock point uniformly could raising efficiency；(3) after flow jet flow drill spray orifice provide from into power deficiency, Cause when drill bit probing is too deep to be difficult to that frictional resistance is overcome to creep into forward, drill bit limits bit operation from the size into power Depth.

Summary of the invention

The invention aims to improve, conventional fluidic drill bit rock breaking capacity is insufficient, does not advise with borehole wall shape not enough from into power Then a series of problems, such as.Propose a kind of radially horizontal well self-advancing type jet bit.

The technical scheme adopted by the invention is that:

A kind of radially horizontal well self-advancing type jet bit of the present invention mainly includes drill bit, bores tooth, rotary shaft, shell, whirlpool Take turns stator, turbine rotor, rear portion pipe nipple, centralizer and rear tube, it is characterised in that: the enclosure interior is equipped with turbine system, Shell is placed among drill bit and centralizer, and front is connected by rotary shaft with drill bit, and rear portion is connected by rear tube with centralizer, Turbine rotor is fastened on the rotary shaft by armature nut and two long key, and rotary shaft rear portion is short by sliding bearing sleeve and rear portion Section is connected, and centralizer and rear tube empty set, front are positioned with circlip, and rear is positioned using rear tube boss.

The drill bit is preceding male, cancels front leaf grating and bores tooth, the brill tooth distribution on each leaf grating it is different and Three leaf grating directions are respectively designed a threaded hole and rotary shaft and are fastened, chisel edge design have a center of orifices and three it is oblique Spray orifice.

The enclosure interior is equipped with four groups of turbine stators and turbine rotor, and turbine stator and turbine rotor all circumferentially divide equally ten Six blades；Shell is connect with rear tube by nut.Shell and spacer ring are provided with identical runner, and shell rear and front end fills respectively There are drive end bearing bracket and rear end cap.

Rear portion pipe nipple center is provided with a centre bore and is provided with a deep hole at center, around the pipe nipple center of rear portion It is uniformly distributed eight through-holes.The drilling fluid of one third enters rotary shaft through rear portion pipe nipple centre bore and is transmitted to front drill bit, and three / bis- drilling fluid enters turbine rotor part by eight holes around of rear portion pipe nipple.

The centralizer includes a wiper block and two supporting blocks, and wiper block and supporting block are provided with identical runner. It is connected between wiper block and supporting block by screw, is connected between two supporting blocks by spring.

Advantages of the present invention: (1) making drill bit spray orifice rotating-spray drilling well by turbine drives mode, increases the rotation to rock Turn shearing force, improves drilling efficiency.(2) by setting sidetracking tooth, the drill bit of rotation modifies the borehole wall, improves the steady of the borehole wall It is qualitative.(3) spray orifice separation before and after, spray orifice before drill bit is arranged, spray orifice after shell setting, drilling fluid pass through rear spray orifice after flowing through turbine It excludes, makes full use of fluid dynamic energy.(4) the design energy righting rear tube of centralizer, reduces the frictional resistance of drilling process, simultaneously Centralizer can also offset turbine drives bring reaction torque, prevent rear tube from rotating under reaction torque effect.(5) before drill bit Projection meter can reduce spray orifice at a distance from rock, improve the rock breaking efficiency of rock.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of radially horizontal well self-advancing type jet bit of the present invention.

Fig. 2 is the A direction view of Fig. 1.

Fig. 3 is the B-B direction cross-sectional view of Fig. 2

Fig. 4 is the rotary shaft schematic diagram of radially horizontal well self-advancing type jet bit.

Fig. 5 is the C-C of Fig. 4 to cross-sectional view.

Fig. 6 is the D-D cross-sectional view of Fig. 1

Fig. 7 is the rear portion pipe nipple schematic diagram of radially horizontal well self-advancing type jet bit.

Fig. 8 is radially horizontal well self-advancing type jet bit turbine rotor scheme of installation.

In figure: 1. rear tubes, 2. supporting blocks, 3. centralizers, 4. wiper blocks, 5. rear portion pipe nipples, 6. turbine stators, 7. turbines Rotor, 8. flat keys, 9. spacer rings, 10. front slide bearing holder (housing, cover)s, 11. drill bits, 12. brill teeth, 13. high-pressure hose connectors, 14. springs, 15. circlip, 16. rear end caps, 17. shells, 18. path sliding bearing sleeves, 19. major diameter sliding bearing sleeves, spray orifice after 20., before 21. End cap, 22. rotary shafts, spray orifice before 23..

Specific embodiment

The present invention will be further described with reference to the accompanying drawing.

Refering to shown in 1~attached drawing of attached drawing 8, a kind of radially horizontal well self-advancing type jet bit provided by present embodiment Mainly include drill bit 11, bore tooth 12, rotary shaft 22, shell 17, turbine stator 6, turbine rotor 7, rear portion pipe nipple 5,3 and of centralizer Rear tube 1, it is characterised in that: turbine system is housed inside the shell 17, shell 17 is placed among drill bit 11 and centralizer 3, Front is connected by rotary shaft 22 with drill bit 11, and rear portion is connected by rear tube 1 with centralizer 3, and turbine rotor 7 passes through rotor spiral shell Female and two flat keys 8 are fixed tightly in rotary shaft 22, and 22 rear portion of rotary shaft is connected by sliding bearing sleeve 18 with rear portion pipe nipple 5, are helped Positive device 3 and 1 empty set of rear tube, front are positioned with circlip 15, and rear is positioned using 1 boss of rear tube.

The drill bit 11 is preceding male, cancels front leaf grating and bores tooth, the brill tooth 12 on each leaf grating is distributed different And a threaded hole and the fastening of rotary shaft 22 are respectively designed in three leaf grating directions, chisel edge design has 23 He of center of orifices Three oblique spray orifices 23.

Four groups of turbine stators 6 and turbine rotor 7 are housed, turbine stator 6 and turbine rotor 7 are all circumferential inside the shell 17 Respectively 16 blades；Shell 17 is connect with rear tube 1 by nut.Shell 17 and spacer ring 9 are provided with identical runner, shell 17 Rear and front end is respectively provided with drive end bearing bracket 21 and rear end cap 16.

5 center of rear portion pipe nipple is provided with a centre bore and is provided with a deep hole at center, 5 center of rear portion pipe nipple week It encloses and is uniformly distributed eight through-holes.The drilling fluid of one third enters rotary shaft 22 through 5 centre bore of rear portion pipe nipple and is transmitted to front brill First 11 are flowed out by preceding spray orifice 23, and 2/3rds drilling fluid enters turbine rotor portion by eight holes around of rear portion pipe nipple 5 Point be transmitted to 17 front end of shell is flowed out by rear spray orifice 20.

The centralizer 3 include a wiper block 4 and two supporting blocks 2, and wiper block 4 be provided with supporting block 3 it is identical Runner.It is connected between wiper block 4 and supporting block 2 by screw, is connected between two supporting blocks by spring 14.

Structure of the invention is further described in conjunction with working principle:

In radially horizontal well operation process, cleaner for high-pressure drilling fluid enters shell 17 by rear tube 1, at rear portion pipe nipple 5 It shunts, the drilling fluid of one third enters rotary shaft 22, preceding spray orifice 23 of the drilling fluid from drill bit 11 by 5 centre bore of rear portion pipe nipple Outflow；Surplus drilling fluid enters turbine system by eight holes that pipe nipple 5 periphery in rear portion is divided equally, and driving turbine rotor 7 rotates, whirlpool Wheel rotor 7 delivers torque to rotary shaft 22 by flat key 8, and drill bit 11 is driven to be rotated, so that the injection stream of rotation is formed, Improve efficiency of breaking rock；Meanwhile the drill bit 11 of rotation plays modification for the borehole wall, improves the stability of the borehole wall.Into turbine The drilling fluid of system passes through the 20 directive borehole wall of rear spray orifice of 17 front end of spacer ring 9 and shell, is produced from into power, the quantity of rear spray orifice 20 It is identical greater than the quantity and diameter of preceding spray orifice 23, jet bit operation forward is pushed in the case where being produced from into power effect.3 energy of centralizer Righting rear tube 1 reduces the frictional resistance of drilling process, while centralizer 3 can also offset turbine drives bring reaction torque, Prevent rear tube 1 from rotating under reaction torque effect.Bit head shunts the drilling fluid that the drilling fluid come and shell eject backward and passes through The runner for crossing centralizer 3 flows backward finally to be prolonged wellbore and recycles to the ground.

The term used in the description of the present application is only for the purpose of describing specific embodiments herein, no It is intended in limitation the application.