阅读说明：本技术 一种随钻获取井底岩屑的钻头及方法 (A kind of drill bit and method obtaining shaft bottom landwaste with brill ) 是由 王仙仙 张晓斌 王红娟 洪千里 杨全枝 于 2019-09-16 设计创作，主要内容包括：本发明属于钻井技术领域,特别涉及一种随钻获取井底岩屑的钻头及方法。一种随钻获取井底岩屑的钻头及方法,包括钻头冠部以及位于钻头冠部内的钻头本体；所述钻头本体内设有钻头腔体；钻头本体上还设有与钻头腔体连通的上喷嘴流道、中喷嘴流道及下喷嘴流道；所述钻头腔体内从中心至腔体内壁依次设有取岩屑结构及用于卡设取岩屑结构的定位套；定位套中部与腔体内壁形成内部流道；取岩屑结构、定位套底部及腔体内壁形成沉砂腔；所述取岩屑结构下行时,下喷嘴流道、腔体内壁底端、取岩屑结构侧壁、定位套及上喷嘴流道形成贯穿的通道。本发明结构简单,使用方便,可在钻井过程中随钻获得井底岩屑。(It is the invention belongs to drilling technology field, in particular to a kind of with the drill bit and method that bore acquisition shaft bottom landwaste.A kind of drill body with the drill bit and method that bore acquisition shaft bottom landwaste, including drill bit and in drill bit；Drill bit cavity is equipped in the drill body；The top nozzle runner, middle nozzle flow channel and lower nozzle flow channel being connected to drill bit cavity are additionally provided on drill body；It is successively arranged from the center to cavity inner wall in the Bit Cavity body and takes landwaste structure and set the positioning sleeve for taking landwaste structure for card；Inner flow passage is formed with cavity inner wall in the middle part of positioning sleeve；Landwaste structure, positioning sleeve bottom and cavity inner wall is taken to form sand setting chamber；Described when taking landwaste structure downlink, lower nozzle flow channel, takes landwaste structure side wall, positioning sleeve and top nozzle runner to form perforative channel at cavity inner wall bottom end.The configuration of the present invention is simple, it is easy to use, shaft bottom landwaste can be obtained with brill in drilling process.)

1. it is a kind of with the drill bit for obtaining shaft bottom landwaste is bored, including drill bit (8) and the drill bit sheet being located in drill bit (8) Body (4)；Drill body (4) upper end is equipped with jointing (1), is equipped with drill bit cavity (6) in drill body (4)；Its feature It is: is additionally provided with the top nozzle runner (9), middle nozzle flow channel (5) and lower spray being connected to drill bit cavity (6) on drill body (4) Mouth runner (7)；It is successively arranged to take landwaste structure (3) and set for card from the center to cavity inner wall in the drill bit cavity (6) and take The positioning sleeve (2) of landwaste structure (3)；Inner flow passage (201) are formed with cavity inner wall in the middle part of positioning sleeve (2)；Take landwaste structure (3), positioning sleeve (2) bottom and cavity inner wall form sand setting chamber (204)；It is described when taking landwaste structure (3) downlink, lower nozzle flow channel (7), cavity inner wall bottom end, take landwaste structure (3) side wall, positioning sleeve (2) and top nozzle runner (9) to form perforative channel.

2. according to claim 1 with the drill bit for boring acquisition shaft bottom landwaste, it is characterised in that: the positioning sleeve (2) is ring-type The lateral wall of positioning sleeve (2), the ring-type positioning sleeve (2) includes small wall thickness and big wall thickness；Small wall thickness is arranged alternately with big wall thickness； It being contacted at the big wall thickness of cyclic annular positioning sleeve (2) with cavity inner wall, the length of positioning sleeve (2) is less than the length for taking landwaste structure (3), Positioning sleeve (2) takes formation sand setting chamber (204) between landwaste structure (3) and cavity inner wall；The inner sidewall of cyclic annular positioning sleeve (2) Unit is set equipped with card, it includes the spring (203) and cylinder set gradually along cavity inner wall to center position that the card, which sets unit, Shape key (202).

3. according to claim 2 with boring the drill bit for obtaining shaft bottom landwaste, it is characterised in that: the landwaste structure (3) of taking Upper and lower ends opening is taper；The taper positioned at upper end is the first pyramidal structure (301), and the taper positioned at lower end is the The opening direction of two pyramidal structures (306), the first pyramidal structure (301) and the second pyramidal structure (306) is towards hollow cylinder In addition；It further include the groove (304) on hollow cylinder side wall, the diameter of the groove (304) is greater than cylindrical keys (202) Diameter, groove (304) depth are less than cylindrical keys (202) length.

4. according to claim 3 with the drill bit for boring acquisition shaft bottom landwaste, it is characterised in that: further include cyclic annular fixed for connecting Position set (2) and the shear pin (303) for taking landwaste structure (3).

5. according to claim 4 with the drill bit for boring acquisition shaft bottom landwaste, it is characterised in that: the entrance in the top nozzle channel Place is equipped with metallic sieve.

6. a kind of with the method for boring acquisition shaft bottom landwaste, it is characterised in that: using as claimed in claim 5 with brill acquisition shaft bottom The drill bit of landwaste, detailed process is as follows:

(1) pitching cuts shear pin (303) to the first pyramidal structure (301), takes landwaste structure (3) under drill bit cavity (6) It moves, until taking landwaste structure (3) lower end and drill bit cavity (6) bottom face contact；

(2) landwaste structure (3) lower end and drill bit cavity (6) bottom face contact are taken, positioned at the groove taken on landwaste structure (3) (304) cylindrical keys (202) center dropped on positioning sleeve (2) is opposite；Spring (203) elongation, pushes cylindrical keys (202) it is caught in groove (304), realizes and take the relatively fixed of landwaste structure (3) and positioning sleeve (2)；Meanwhile top nozzle runner (9), sand setting chamber (204), tap hole (305), center flow channels (302), the second pyramidal structure (306) and lower nozzle flow channel (7) phase It is logical, form open loop；Inner flow passage (201) is communicated with middle nozzle flow channel (5), forms open loop；

(3) liquid flows through inner flow passage (201) in drill string, middle nozzle flow channel (5) enters annular space；After broken landwaste is carried successively Sand setting chamber is finally entered through lower nozzle flow channel (7), the second pyramidal structure (306), center flow channels (302) and tap hole (305) (204), be crushed landwaste in through metal sand control screens (10) stop enter sand setting chamber (204) bottom, liquid through top nozzle runner (9) into Enter annular space, completes to obtain landwaste process.

Technical field

It is the invention belongs to drilling technology field, in particular to a kind of with the drill bit and method that bore acquisition shaft bottom landwaste.

Background technique

In drilling process, drill bit bores broken rock debris in shaft bottom and is known as landwaste.Landwaste be timely understanding formation lithology and The audio-visual materials of oil-gas Layer, it constantly returns to ground with the circulation of drilling fluid.One is pressed in live sieve residue log practical operation Determine depth interval sampling, and makees depth correction by landwaste lagged time.The landwaste being crushed when by getting into a certain depth, by boring Well liquid takes the time on ground to, has not been that drill bit bores the time for reaching this depth, and has one section of lag.Well is drilled deeper, lag Time is longer.Landwaste lagged time by well depth, flushing fluid density and viscosity, the density of landwaste and size, the pressure of slush pump with The many factors such as discharge capacity influence, and tend not to the section feelings for accurately restoring down-hole formation so relying on ground and carrying out sieve residue log Condition.

Summary of the invention

In view of the above-mentioned problems, the object of the present invention is to provide a kind of with the drill bit for boring acquisition shaft bottom landwaste and its user Method can accurately determine stratigraphic section in drilling process with acquisition shaft bottom landwaste is bored.

Technical program of the present invention lies in:

A kind of drill body with the drill bit for boring acquisition shaft bottom landwaste, including drill bit and in drill bit；It is described Drill bit cavity is equipped in drill body；The top nozzle runner being connected to drill bit cavity, middle nozzle flow channel are additionally provided on drill body And lower nozzle flow channel；It is successively arranged to take landwaste structure and set for card from the center to cavity inner wall in the Bit Cavity body and takes landwaste The positioning sleeve of structure；Inner flow passage is formed with cavity inner wall in the middle part of positioning sleeve；Take landwaste structure, positioning sleeve bottom and cavity inner wall Form sand setting chamber；Described when taking landwaste structure downlink, lower nozzle flow channel, takes landwaste structure side wall, positioning sleeve at cavity inner wall bottom end And top nozzle runner forms perforative channel.

The positioning sleeve is cyclic annular positioning sleeve, and the lateral wall of the ring-type positioning sleeve includes small wall thickness and big wall thickness；Small wall It is thick to be arranged alternately with big wall thickness；It is contacted at the big wall thickness of cyclic annular positioning sleeve with cavity inner wall, the length of positioning sleeve, which is less than, takes landwaste The length of structure, positioning sleeve take formation sand setting chamber between landwaste structure and cavity inner wall；The inner sidewall of cyclic annular positioning sleeve is equipped with Card sets unit, and it includes the spring set gradually along cavity inner wall to center position and cylindrical keys that the card, which sets unit,.

The upper and lower ends opening for taking landwaste structure is taper；The taper positioned at upper end is the first taper knot Structure, the taper positioned at lower end are the second pyramidal structure, the opening direction direction sky of the first pyramidal structure and the second pyramidal structure Other than heart cylinder；It further include the groove on hollow cylinder side wall, the diameter of the groove is greater than cylindrical keys diameter, groove Depth is less than cylindrical keys length.

It further include for connecting cyclic annular positioning sleeve and taking the shear pin of landwaste structure.

The inlet in the top nozzle channel is equipped with metallic sieve.

A method of shaft bottom landwaste being obtained with boring, using the drill bit for obtaining shaft bottom landwaste with brill as described above, specifically Process is as follows:

(1) pitching cuts shear pin, landwaste structure is taken to move down along drill bit cavity, until taking landwaste knot to the first pyramidal structure Structure lower end is contacted with drill bit cavity bottom surface；

(2) it takes landwaste structure lower end to contact with drill bit cavity bottom surface, drops to be located at positioned at the groove taken in landwaste structure and determine It is opposite that position covers upper cylindrical keys center；Spring elongation, pushes cylindrical keys to be caught in groove, and realization takes landwaste structure and positioning What is covered is relatively fixed；Meanwhile top nozzle runner, sand setting chamber, tap hole, center flow channels, the second pyramidal structure and lower nozzle flow channel It communicates, forms open loop；Inner flow passage is communicated with middle nozzle flow channel, forms open loop；

(3) liquid flows through inner flow passage in drill string, middle nozzle flow channel enters annular space；Successively through lower nozzle after broken landwaste is carried Runner, the second pyramidal structure, center flow channels and tap hole finally enter sand setting chamber, in broken landwaste through metal sand control screens stop into Enter sand setting bottom of chamber portion, liquid enters annular space through top nozzle runner, completes to obtain landwaste process.

The technical effects of the invention are that:

The present invention takes landwaste structure lower end to contact with drill bit cavity bottom surface, drops to and is located at positioned at the groove taken in landwaste structure Cylindrical keys center on positioning sleeve is opposite；Spring elongation, pushes cylindrical keys to be caught in groove, and realization takes landwaste structure and determines Position covers relatively fixed；Meanwhile top nozzle runner, sand setting chamber, tap hole, center flow channels, the second pyramidal structure and lower nozzle stream Road communicates, and forms open loop；Inner flow passage is communicated with middle nozzle flow channel, forms open loop；Liquid flows through inner flow passage, middle spray in drill string Mouth runner enters annular space；Successively through lower nozzle flow channel, the second pyramidal structure, center flow channels and tap hole after broken landwaste is carried Sand setting chamber is finally entered, is crushed and stops to enter sand setting bottom of chamber portion through metal sand control screens in landwaste, liquid enters through top nozzle runner Annular space is completed to obtain landwaste process.The configuration of the present invention is simple, it is easy to use, shaft bottom landwaste can be obtained with brill in drilling process.

Detailed description of the invention

Fig. 1 is the structural schematic diagram that drill bit of the present invention normally creeps into state.

Fig. 2 is the sectional view that drill bit of the present invention normally creeps into state.

Fig. 3 is the structural schematic diagram that drill bit of the present invention obtains landwaste state.

Fig. 4 is the sectional view that drill bit of the present invention obtains landwaste state.

Fig. 5 is the sectional view of positioning sleeve of the present invention.

Appended drawing reference: 1-jointing；2-positioning sleeves；3-take landwaste structure；4-drill bodies；5-middle nozzle streams Road；6-drill bit cavitys；7-lower nozzle flow channels；8-drill bits；9-top nozzle runners；10-metal sand control screens；201-is interior Portion's runner；202-cylindrical keys；203-springs；204-sand setting chambers；301-the first pyramidal structure；302-center flow channels； 303-shear pins；304-grooves；305-tap holes；306-the second pyramidal structure.

Specific embodiment