CN110344757A - A kind of counterflush drilling system and counterflush drilling method - Google Patents
A kind of counterflush drilling system and counterflush drilling method Download PDFInfo
- Publication number
- CN110344757A CN110344757A CN201910689266.4A CN201910689266A CN110344757A CN 110344757 A CN110344757 A CN 110344757A CN 201910689266 A CN201910689266 A CN 201910689266A CN 110344757 A CN110344757 A CN 110344757A
- Authority
- CN
- China
- Prior art keywords
- drilling
- drilling rod
- pipe nipple
- counterflush
- liquid section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
Abstract
The present invention provides a kind of counterflush drilling system and counterflush drilling methods, belong to drilling tool field, including casing, circulation canal switching pipe nipple, the first drilling rod, the second drilling rod and drill bit；Work pit shaft is formed in casing；Circulation canal, which switches pipe nipple, has top connection and rubber stopper, and setting is in work pit shaft, the interior inflow channel for forming isolation of top connection and out circulation road；One end that circulation canal switches pipe nipple connects the first drilling rod, and the other end connects the second drilling rod；Drilling fluid feed path in first drilling rod, the first drilling rod form out liquid section outside；Drilling fluid reclamation channel is formed in second drilling rod, is formed outside the second drilling rod into liquid section；Rubber stopper and work shaft in wall sealed set, isolate liquid section and enter liquid section；Enter liquid section to be connected in drilling well with drilling well recovery approach.Ground installation does not need change adjustment, and on conventional drilling construction technology without influence, shaft bottom Open-Hole Section annular space reduces drilling frictional resistance, be conducive to the cost that raises speed, reduces, ensure drilling safety without landwaste.
Description
Technical field
The present invention relates to drilling tool fields, in particular to a kind of counterflush drilling system and counterflush drilling side
Method.
Background technique
Counterflush drilling technology be in order to solve low pressure, hyposmosis, leakiness oil-gas reservoir probing problem, reduce drilling frictional resistance,
Protection reservoir and the drilling technology for improving drilling safety and growing up.The technology is normally applied double-wall drill pipe, passes through
Circulatory mediator is injected in drill pipe annulus, after drill bit and cutting carring are cleaned in shaft bottom, the drilling fluid of cutting carring flows into drilling rod
Ground is returned on internal channel, in drilling process, broken landwaste does not enter drilling rod and bore hole annulus, purifies in annular space to pass through
Processing, the stable drilling fluid of performance, pressure are stablized, can effective protection reservoir, keep wellbore stability, reduce drill string frictional resistance
Deng.But since double-wall drill pipe cost and production difficulty are higher, it is also necessary to ground swivel head blowout prevention matched with double-wall drill pipe
Equipments and the tools such as device, underground reacting cycle motor, hole deviation monitoring instrument, downhole blow-out preventer and drill bit, limit answering for the technology
With.
Summary of the invention
The present invention provides a kind of counterflush drilling system and counterflush drilling method, wherein counterflush drilling system circulation
Channel switches pipe nipple and conventional single wall drilling rod is mating, in addition to needing to change conventional bit and being reverse circulation drill bit, remaining equipment and tool
Can normal use, on conventional drilling construction technology also without influence.Aim to solve the problem that counterflush drilling system presence in the prior art
The above problem.
The present invention is implemented as follows:
A kind of counterflush drilling system, including casing, circulation canal switching pipe nipple, the first drilling rod, the second drilling rod and drill bit；
Described sleeve pipe is upper one work opening time finishing drilling tripping in wellbore and creeping into through cement stabilization, internal formation lower part naked eye
Make pit shaft；
The circulation canal switching pipe nipple has top connection and rubber stopper, and the circulation canal switching pipe nipple is arranged described
It works in pit shaft, forms the inflow channel being isolated and out circulation road in the top connection；
One end of the circulation canal switching pipe nipple connects first drilling rod, and the other end connects second drilling rod；
Form drilling fluid feed path be connected to the inflow channel in first drilling rod, first drilling rod outside and
The work shaft in wall forms out liquid section；It is formed in second drilling rod logical with the drilling fluid reclamation that circulation road is connected to described out
Road, second drilling rod is outer to be formed with the work shaft in wall into liquid section；The rubber stopper and the work shaft in wall are close
Envelope setting, isolation it is described go out liquid section and it is described enter liquid section；
The bottom of second drilling rod is arranged in the drill bit, and the connection drilling fluid reclamation is provided on the drill bit
The bit port in channel；
It is described enter liquid section be connected at the bit port with the drilling well recovery approach.
It in an embodiment of the present invention, further include for clearing up landwaste and providing the drill fluid purification of clean drilling liquid
System, the drilling fluid output of one end connection drilling fluid cleaning system of first drilling rod far from circulation canal switching pipe nipple
Mouthful.
In an embodiment of the present invention, described sleeve pipe connection drill fluid purification at the port of liquid section out
The drilling fluid input port of system.
In an embodiment of the present invention, the circulation canal switching pipe nipple further includes detachably setting with the top connection
The reverse mandrel set；
The diversion space of connection drilling fluid feed path is provided in the top connection；
The reverse mandrel is arranged in the diversion space, and the diversion space is separated into the reverse mandrel and institute
State the circulation road out inside the inflow channel and the reverse mandrel between diversion space inner wall；
The top connection has the first end and second end being oppositely arranged；
The discharge annular space for being connected to the liquid section out and the circulation road out is formed between the first end and the rubber stopper,
The inflow annular space for entering liquid section connection and the inflow channel described in being connected to is formed between the second end and the rubber stopper.
In an embodiment of the present invention, the rubber stopper sulfidization molding is on the outside of the top connection.
In an embodiment of the present invention, the rubber stopper forms the first bulge loop, institute close to the position of the first end
The first bulge loop is stated for being close to work shaft in wall, isolation it is described go out liquid section and it is described enter liquid section；The rubber stopper is close to described
The position of second end forms the second bulge loop, and second bulge loop is for being close to work shaft in wall, isolation liquid section and the institute out
It states into liquid section.
In an embodiment of the present invention, the top connection is corresponding between first bulge loop and second bulge loop
Position be provided with wiper block, the wiper block is fixedly connected on the outer ring of the top connection.
A kind of counterflush drilling method, using above-mentioned counterflush drilling system, comprising steps of
A. upper one tripping in casing cementing after time wellbore finishing drilling is opened；
B. bored block different depth earth boring bit drilling depth is counted, it is deep to bore estimated drilling using average bit footage as every time
Degree is according to Di, select the drill bit and second drilling rod；
C. tripping in drilling tool, drilling tool depth of setting reach LiWhen, the circulation canal is installed on the top of second drilling rod
Switch pipe nipple, first drilling rod is installed in the other end of circulation canal switching pipe nipple, continuing lower brill stretches the drill bit
To shaft bottom, wherein LiCompare DiBig 30m or more；
D. turn on pump realizes circulation, pressurization drilling to drilling fluid feed path supply drilling fluid.
In an embodiment of the present invention, it is further comprised the steps of: after the step d
E. when drilling depth is close to or up to DiWhen, first drilling rod is above mentioned, bores estimated drilling depth according to next time
Di+1, the position of circulation canal switching pipe nipple is adjusted to Li+1, formed in the drilling rod that the circulation canal switches below pipe nipple
New second drilling rod installs new first drilling rod above circulation canal switching pipe nipple；
F. step e described in repeating said steps a-.
In an embodiment of the present invention, when needing to restore direct flushing, above mention first drilling rod 30~
50m position or installs the another set of circulation canal switching pipe nipple in well head among first drilling rod again, lower brill, turn on pump,
It realizes direct flushing, after clean-out service, above mentions the lower circulation canal close to well head of the first drilling rod disassembly and cut
Pipe nipple is changed, connects and is drilled into shaft bottom recovery reverse circulation drilling under new first drilling rod.
The beneficial effects of the present invention are: the counterflush drilling system and counterflush drilling method that provide through the invention can be with
Realize that the counterflush drilling of Open-Hole Section, ground installation do not need change adjustment, on conventional drilling construction technology without influence, shaft bottom is naked
Eye section annular space reduces drilling frictional resistance, is conducive to the cost that raises speed, reduces, ensure drilling safety without landwaste.This counterflush drilling follows
Ring channel, which switches pipe nipple, can realize the segmentation of casing with the cooperation of casing by rubber stopper, and to go out liquid in single casing
Section and enter liquid section and be respectively provided with different flow directions, the supply of drilling fluid both may be implemented, also may be implemented with landwaste drilling fluid
Reflux.Counterflush drilling circulation canal switching pipe nipple is positioned by wiper block in the position pair in casing, it can be to avoid rubber
Rubber plug bias causes stress to concentrate, frictional force increases, and improves the rubber stopper service life whereby.The inflow ring that rubber stopper and top connection are formed
Empty and discharge annular space design can reinforce sealing performance while providing runner.By leaning in counterflush drilling method
The position of nearly well head install additional circulation canal switching pipe nipple the flow direction of the fluid in entire well can be realized falls completely
It sets, auto-flushing in well can be realized and dredge, carry out complicated cleaning operation without additionally protruding into other equipment.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of embodiment of the present invention
Attached drawing be briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not to be seen as
It is the restriction to range, it for those of ordinary skill in the art, without creative efforts, can be with root
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 is that the structure at the first visual angle of the counterflush drilling circulation canal switching pipe nipple that embodiment of the present invention provides is shown
It is intended to；
Fig. 2 be in Fig. 1 A-A to cross-sectional view；
Fig. 3 is that the structure at the second visual angle of the counterflush drilling circulation canal switching pipe nipple that embodiment of the present invention provides is shown
It is intended to；
Fig. 4 is the cross-sectional view of B-B direction in Fig. 3；
The structural schematic diagram for the top connection that Fig. 5 embodiment of the present invention provides；
Fig. 6 be in Fig. 5 C-C to cross-sectional view；
Fig. 7 is the structural schematic diagram for the reverse mandrel that embodiment of the present invention provides；
Fig. 8 is the structural schematic diagram for the gasket that embodiment of the present invention provides；
Fig. 9 is the structural schematic diagram for the rubber stopper that embodiment of the present invention provides；
Figure 10 be in Fig. 9 D-D to cross-sectional view；
Figure 11 is the structural schematic diagram for the counterflush drilling system that embodiment of the present invention provides；
Figure 12 is the fluid flow direction schematic diagram of counterflush drilling circulation canal switching pipe nipple part in Figure 11.
Icon: 001- circulation canal switches pipe nipple；100- top connection；200- rubber stopper；300- reverse mandrel；It is connect under 400-
Head；101- first end；103- second end；Annular space is discharged in 110-；130- flows into annular space；150- diversion space；310- inflow channel；
330- goes out circulation road；301- commutation side；350- diversion trench；331- first through hole；The second through-hole of 111-；The first deflector hole of 370-；
The second deflector hole of 170-；500- gasket；303- antirotation keys；410- extending channel；430- sealing ring；190- wiper block；191-
Wearable hard alloy column；210- location hole；600- casing；610- work pit shaft；611- goes out liquid section；613- enters liquid section；710-
One drilling rod；The second drilling rod of 730-；711- drilling fluid feed path；731- drilling fluid reclamation channel；800- drill bit；810- drill bit water
Eye；The first bulge loop of 230-；The second bulge loop of 250-.
Specific embodiment
To keep the purposes, technical schemes and advantages of embodiment of the present invention clearer, implement below in conjunction with the present invention
The technical solution in embodiment of the present invention is clearly and completely described in attached drawing in mode, it is clear that described reality
The mode of applying is some embodiments of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ability
Domain those of ordinary skill every other embodiment obtained without creative efforts, belongs to the present invention
The range of protection.Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit below and is wanted
The scope of the present invention of protection is sought, but is merely representative of selected embodiment of the invention.Based on the embodiment in the present invention,
Every other embodiment obtained by those of ordinary skill in the art without making creative efforts belongs to this
Invent the range of protection.
In the description of the present invention, it is to be understood that, indicating position or the term of positional relationship are based on shown in attached drawing
Orientation or positional relationship, be merely for convenience of description of the present invention and simplification of the description, rather than the equipment of indication or suggestion meaning
Or element must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be direct phase
Even, can also indirectly connected through an intermediary, the interaction that can be connection or two elements inside two elements is closed
System.For the ordinary skill in the art, above-mentioned term in the present invention specific can be understood as the case may be
Meaning.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be on or below second feature
Directly contacted including the first and second features, also may include the first and second features be not direct contact but by them it
Between other characterisation contact.Moreover, fisrt feature is on second feature, top and above include fisrt feature second spy
Right above sign and oblique upper, or first feature horizontal height is merely representative of higher than second feature.Fisrt feature second feature it
Under, lower section and fisrt feature included below be directly below and diagonally below the second feature, or be merely representative of first feature horizontal height
Less than second feature.
Embodiment
A kind of counterflush drilling system is present embodiments provided, Fig. 1, Fig. 2, Fig. 3 and Fig. 4, this reverse circulation drilling are please referred to
Well system includes casing 600, circulation canal switching pipe nipple 001, the first drilling rod 710, the second drilling rod 730 and drill bit 800.
Casing 600 is after upper one opens the finishing drilling of time wellbore, in tripping in drilling well and through cement stabilization borehole wall, inside be formed as
The work pit shaft 610 of lower part naked eye drilling.
Counterflush drilling circulation canal switch pipe nipple 001 include top connection 100, rubber stopper 200, reverse mandrel 300 and under
Connector 400, wherein 200 sets of rubber stopper outsides in top connection 100.
Figure 11 and Figure 12 are please referred to, counterflush drilling circulation canal switching pipe nipple 001 is mounted on the work pit shaft of casing 600
In 610, one end that circulation canal switches pipe nipple 001 connects the first drilling rod 710, and the other end connects the second drilling rod 730；First drilling rod
Formation drilling fluid feed path 711 in 710, the outer liquid section out that annular space shape is formed with work 610 inner wall of pit shaft of the first drilling rod 710
611；Drilling fluid reclamation channel 731 is formed in second drilling rod 730, the second drilling rod 730 is outer and work 610 inner wall of pit shaft forms annular space
Shape enters liquid section 613；The rubber stopper 200 of counterflush drilling circulation canal switching pipe nipple 001 is set with work 610 inner wall of pit shaft sealing
It sets, by liquid section 611 out and enters liquid section 613 and be isolated.
Further, a channel of counterflush drilling circulation canal switching pipe nipple 001 is communicated with liquid section 613 is entered to naked eye
Interior supply drilling fluid, then by same section of counterflush drilling circulation canal switch another channel that pipe nipple 001 isolates with
611 phase of liquid section is common to the reflux of drilling fluid out.
Fig. 5 and Fig. 6 are please referred to, in the present embodiment, top connection 100 has the first end 101 and second end being oppositely arranged
103；Rubber stopper 200 is set in 100 outside of top connection, and discharge annular space 110, discharge are formed between first end 101 and rubber stopper 200
Annular space 110 is directly connected to liquid section 611 out, is formed between second end 103 and rubber stopper 200 and is flowed into annular space 130, and annular space is flowed into
130 are directly connected to liquid section 613 is entered；The diversion space 150 of connection drilling fluid feed path 711 is provided in top connection 100；It changes
It is arranged in diversion space 150 to mandrel 300, diversion space 150 is separated into reverse mandrel 300 and 150 inner wall of diversion space
Between inflow channel 310 and reverse mandrel 300 inside go out circulation road 330.It is additionally provided in the end of the second drilling rod 730
For the drill bit 800 of drilling well, bit port 810 is provided on drill bit 800.
Drilling fluid feed path 711, flows into annular space 130, bit port 810, drilling fluid reclamation channel at inflow channel 310
731, inflow channel 310 and discharge annular space 110 are sequentially communicated.
Overall drilling fluid flow channel are as follows: be flowed into inflow ring from drilling fluid feed path 711 via inflow channel 310
In sky 130, is entered by inflow annular space 130 into liquid section 613, then taken in naked eye from liquid section 613 is entered, bring part rock in naked eye into
The drilling fluid of bits is flowed back into drilling fluid reclamation channel 731 by bit port 810, by with circulation road 330 is connected to out brill
Well liquid recovery approach 731 enters out circulation road 330, then enters out liquid section from circulation road 330 out via discharge annular space 110
611, finally it is discharged again from liquid section 611 out.
In the present embodiment, diversion space 150 forms connection drilling fluid feed path 711 close to one end of first end 101
Arrival end, reverse mandrel 300 has commutation side 301 corresponding with arrival end, and the circumferential outside of reverse mandrel 300 and water conservancy diversion are empty
Between 150 inner wall between form circumferential honeycomb duct, commutation side 301, which is close to be arranged and be provided with arrival end, to be connected to drilling fluid and supplies
Multiple diversion trenches 350 in channel 711 and circumferential honeycomb duct.
Drilling fluid enters in circumferential honeycomb duct from drilling fluid feed path 711 by diversion trench 350, and annular honeycomb duct is formed
Above-mentioned inflow channel 310.
Fig. 1 and Fig. 7 are please referred to, specifically, the commutation side 301 of reverse mandrel 300 and the arrival end of diversion space 150 is interior
The face that wall is close to setting forms sealing surface, and the position corresponding with sealing surface of commutation side 301 is provided with first through hole 331, top connection
100 positions corresponding with sealing surface are provided with the second through-hole 111, and first through hole 331 is formed through with the second through-hole 111 and is connected to out
First deflector hole 370 of circulation road 330 and discharge annular space 110.
First deflector hole 370 is directly isolated due to being arranged in sealing surface with diversion trench 350.Pass through the first water conservancy diversion
Hole 370 can will go out circulation road 330 and be connected to discharge annular space 110.Since the isolation of the first deflector hole 370 and diversion trench 350 is set
Meter i.e. be directly realized reverse mandrel 300 be arranged in diversion space 150, by diversion space 150 be separated into reverse mandrel 300 with
Go out circulation road 330 inside inflow channel 310 and reverse mandrel 300 between 150 inner wall of diversion space；Further such that entering
Circulation road 310 and out circulation road 330 have antipodal two flow directions.Positioned at the circumferential honeycomb duct of 300 outer ring of reverse mandrel
It is directly connected to drilling fluid feed path 711, therefore, the circumferential honeycomb duct for being fed through outside of drilling fluid can be made complete
At, and the collection of drilling fluid is completed by the circulation road 330 that goes out inside reverse mandrel 300.
Specifically, diversion space 150 has close to the outlet end of second end 103, top connection 100 is provided with company in outlet end
Logical circumferential direction honeycomb duct and the second deflector hole 170 for flowing into annular space 130.
In the present embodiment, in order to improve 200 pairs of work 610 sealing performances of pit shaft of rubber stopper, liquid section out when guaranteeing work
611 and enter liquid section 613 and keep directly being isolated, rubber stopper 200 forms the first bulge loop 230, i.e. rubber close to the position of first end 101
Rubber plug 200 forms the first bulge loop 230 in outside corresponding with discharge annular space 110, and the first bulge loop 230 is close in work pit shaft 610
Wall.Rubber stopper 200 forms the second bulge loop 250 close to the position of second end 103, i.e., rubber stopper 200 is corresponding with annular space 130 is flowed into
Outside form the first bulge loop 230, the second bulge loop 250 is for being close to 610 inner wall of work pit shaft.Due to discharge annular space 110 and stream
Enter to be respectively formed certain hydraulic in annular space 130, therefore can also further push the first bulge loop 230 and the second bulge loop 250 to work
Make 610 inner wall of pit shaft and form extruding force, reinforces sealing performance.
Therefore, Figure 11 and Figure 12, specific drilling fluid flow channel are as follows: pass through from drilling fluid feed path 711 are please referred to
Diversion trench 350 enters in the inflow channel 310 that circumferential honeycomb duct is formed, then from by inflow channel 310 via the second deflector hole
170 are flowed into inflow annular space 130, are entered by inflow annular space 130 into liquid section 613, then take in naked eye from liquid section 613 is entered,
The drilling fluid of part landwaste is brought in naked eye into flow back into drilling fluid reclamation channel 731 by bit port 810, by with go out to flow
The drilling fluid reclamation channel 731 that channel 330 is connected to enters out circulation road 330, then from circulation road 330 out via the first water conservancy diversion
Hole 370 enters discharge annular space 110, enters out liquid section 611 from discharge annular space 110, is finally discharged again from liquid section 611 out.
Please refer to Fig. 7 and Fig. 8, in the present embodiment, 150 inner wall of diversion space arrival end be arranged circumferentially it is multiple
Slot is accessed, forms seal ridge between two neighboring access slot, the sealing surface being close to seal ridge, sealing surface is arranged in commutation side 301
The gasket 500 for reinforcing sealing is provided between seal ridge, the setting of gasket 500 can reinforce sealing effect.
It should be noted that the commutation of slot setting to reverse mandrel 300 can also will be accessed in partial replacement embodiment
In the circumferential direction at end 301, and the arrival end in 150 inner wall of diversion space is smoothly arranged.Such setting can achieve similar effect
Fruit, but the 301 integral strength dramatic decrease of commutation side of reverse mandrel 300 can be made, it reduces the service life.
Since first through hole 331 and the second through-hole 111 need exactitude position, and it must not be displaced dislocation in use.
Therefore one end of arrival end is being provided with antirotation keys 303 in reverse mandrel 300, is being provided in top connection 100 and antirotation keys
The anti-rotation groove of 303 cooperations, antirotation keys 303 and anti-rotation groove are equipped with to rotate to avoid reverse mandrel 300 and misplace.
The setting of lower contact 400 has the extending channel 410 coaxial with circulation road 330 out in second end 103, lower contact 400.
In the mounting hole of one end insertion 100 second end 103 of top connection setting of lower contact 400.
There are two sealing rings 430 for setting between the one end of reverse mandrel 300 far from arrival end and top connection 100.Pass through
Sealing ring 430 improves sealing performance, and drilling fluid is avoided to flow out from circumferential honeycomb duct via mounting hole.
Fig. 5, Fig. 9 and Figure 10 are please referred to, in order to which the entire counterflush drilling circulation canal of raising switches the wear-resisting of pipe nipple 001
Property, also for the positioning of rubber stopper 200 after installation rubber stopper 200, multiple wiper blocks are circumferentially provided on the outer ring of top connection 100
190, rubber stopper 200 is provided with location hole 210 corresponding with wiper block 190.Wiper block 190 is stretched out from location hole 210, can be right
Rubber stopper 200 is positioned, and wiper block 190 directly contacts the inner wall of work pit shaft 610, in use counterflush drilling
When circulation canal switches pipe nipple 001 and work 610 inner wall relative displacement of pit shaft, counterflush drilling is improved by wiper block 190 and is followed
The overall wear resistance of ring channel switching pipe nipple 001.
In the present embodiment, rubber stopper 200 is molded directly within the outside of top connection 100 using mold by sulfuration process.
Location hole 210 is formed after shaping.
In the present embodiment, a wearable hard alloy column 191, wearable hard alloy column are at least inlayed in wiper block 190
191 stretch out from wiper block 190 far from one end of diversion space 150.It can be further improved by wearable hard alloy column 191 resistance to
Mill property.
In the present embodiment, counterflush drilling system further includes for clearing up landwaste and providing the drilling fluid of clean drilling liquid
Purification system (not shown), first drilling rod 710 connect drilling well far from one end of circulation canal switching pipe nipple 001
The drilling fluid delivery outlet of liquid purification system.The connection drill fluid purification at the port of liquid section 611 out of described sleeve pipe 600
The drilling fluid input port of system.Drilling fluid Reusability can be drilling well by drilling fluid delivery outlet by drilling fluid cleaning system
Liquid feed path 711 supply purification drilling fluid, drilling fluid after domestic cutting carring by drilling fluid reclamation channel 731 via
Drilling fluid input port returns in drilling fluid cleaning system, and drilling fluid cleaning system purifies band landwaste drilling fluid, takes out rock
Bits etc. export after impurity, then by drilling fluid delivery outlet, and then are formed and recycled.
The counterflush drilling of Open-Hole Section may be implemented in the counterflush drilling system provided through the invention, and ground installation is not required to
Adjustment is changed, on conventional drilling construction technology without influence, shaft bottom Open-Hole Section annular space reduces drilling frictional resistance, be conducive to without landwaste
It raises speed, reduce cost, ensure drilling safety.This counterflush drilling circulation canal switching pipe nipple 001 can be with by rubber stopper 200
The segmentation of casing 600 is realized with the cooperation of casing 600, and going out liquid section 611 and entering liquid section 613 in single casing 600 is divided
Flow direction that Ju You be not different, both may be implemented the supply of drilling fluid, the reflux with landwaste drilling fluid also may be implemented.Pass through righting
Block 190 switches pipe nipple 001 in the position pair in casing 600 to position counterflush drilling circulation canal, can be to avoid rubber stopper
200 bias cause stress to concentrate, frictional force increases, and improve 200 service life of rubber stopper whereby.Rubber stopper 200 and top connection 100 are formed
Inflow annular space 130 and discharge annular space 110 design can reinforce sealing performance while runner is provided.
Embodiment two
A kind of counterflush drilling method is present embodiments provided, Figure 11 and Figure 12, this counterflush drilling method are please referred to
It is realized using a kind of counterflush drilling system of offer of embodiment, comprising steps of
A. upper one the well cementation of tripping in casing 600 after time wellbore finishing drilling is opened；
B. bored 800 drilling depth of block different depth earth boring bit is counted, drilling depth is averaged as every brill using drill bit 800 and is expected
Drilling depth data Di, Choice of Bits 800 and the second drilling rod 730；
C. tripping in drilling tool, drilling tool depth of setting reach LiWhen, it is short in the end of the second drilling rod 730 installation circulation canal switching
Section 001 installs the first drilling rod 710 in the other end of circulation canal switching pipe nipple 001, and continuing lower brill makes drill bit 800 extend to shaft bottom,
Wherein, LiCompare DiBig 30m or more；
D. turn on pump supplies drilling fluid to drilling fluid feed path 711 and realizes circulation, pressurization drilling.
Further include following steps if the secondary drilling well does not reach ultimate depth:
E. when drilling depth is close to or up to DiWhen, the first drilling rod 710 is above mentioned, bores estimated drilling depth according to next time
Di+1, the position of adjustment circulation canal switching pipe nipple 001 is to Li+1, formed newly in the drilling rod that circulation canal switches below pipe nipple 001
The second drilling rod 730, circulation canal switching pipe nipple 001 above the first new drilling rod 710 is installed；
F. step a- step e is repeated.
By this counterflush drilling method, when each drilling well may be implemented, it is basic that circulation canal switches pipe nipple 001
In the position close to well head, facilitate the reflux with landwaste drilling fluid, also ensures that circulation canal switching pipe nipple 001 is in controllable
Range, convenient for keeping circulation canal switching pipe nipple 001 to the sealing function of 600 inner wall of casing.
In addition, above mentioning the first drilling rod 710 when needing to restore direct flushing and reaching 30~50m, in the first drilling rod 710
Another set of circulation canal switching pipe nipple 001, lower brill are installed in well head in intermediate position again, and turn on pump realizes direct flushing, dredging
Circulation canal, after circulation canal dredging, a set of circulation canal switching pipe nipple 001 filled after above mentioning under the disassembly of the first drilling rod 710, even
It connects and is drilled into shaft bottom recovery reverse circulation drilling under the first new drilling rod 710.
It is above-mentioned need the case where replying direct flushing include: when counterflush drilling pump pressure sharply increase, be judged as shaft bottom
When bit port 810 suppresses stifled.
It can be realized in entire well by install additional circulation canal in the position close to well head and switching pipe nipple 001
The flow direction of fluid be to be fully inverted, auto-flushing in well can be realized and dredge, answered without additionally protruding into other equipment
Miscellaneous cleaning operation.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for this field
For technical staff, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of counterflush drilling system, which is characterized in that bored including casing, circulation canal switching pipe nipple, the first drilling rod, second
Bar and drill bit；
Described sleeve pipe is upper one active well opening time finishing drilling tripping in wellbore and creeping into through cement stabilization, internal formation lower part naked eye
Cylinder；
The circulation canal switching pipe nipple has top connection and rubber stopper, and the circulation canal switching pipe nipple is arranged in the work
The inflow channel being isolated and out circulation road are formed in pit shaft, in the top connection；
One end of the circulation canal switching pipe nipple connects first drilling rod, and the other end connects second drilling rod；
Form the drilling fluid feed path being connected to the inflow channel in first drilling rod, first drilling rod outside with it is described
Work shaft in wall forms out liquid section；Formed in second drilling rod with the drilling fluid reclamation channel that circulation road is connected to out,
Second drilling rod is outer to be formed with the work shaft in wall into liquid section；The rubber stopper is set with work shaft in wall sealing
Set, isolation it is described go out liquid section and it is described enter liquid section；
The bottom of second drilling rod is arranged in the drill bit, and the connection drilling fluid reclamation channel is provided on the drill bit
Bit port；
It is described enter liquid section be connected at the bit port with the drilling well recovery approach.
2. counterflush drilling system according to claim 1, which is characterized in that further include for clearing up landwaste and providing net
The drilling fluid cleaning system of drilling fluid, first drilling rod connect drilling fluid far from one end of circulation canal switching pipe nipple
The drilling fluid delivery outlet of purification system.
3. counterflush drilling system according to claim 2, which is characterized in that described sleeve pipe is in the port of the liquid section out
Place connects the drilling fluid input port of the drilling fluid cleaning system.
4. counterflush drilling system according to claim 1, which is characterized in that the circulation canal switches pipe nipple and further includes
The reverse mandrel being detachably arranged with the top connection；
The diversion space of connection drilling fluid feed path is provided in the top connection；
The reverse mandrel is arranged in the diversion space, and the diversion space is separated into the reverse mandrel and is led with described
The circulation road out inside the inflow channel and the reverse mandrel between fluid space inner wall；
The top connection has the first end and second end being oppositely arranged；
The discharge annular space for being connected to the liquid section out and the circulation road out is formed between the first end and the rubber stopper, it is described
The inflow annular space for entering liquid section connection and the inflow channel described in being connected to is formed between second end and the rubber stopper.
5. counterflush drilling system according to claim 1, which is characterized in that the rubber stopper sulfidization molding is on described
On the outside of connector.
6. counterflush drilling system according to claim 4, which is characterized in that the rubber stopper is close to the first end
Position forms the first bulge loop, first bulge loop for being close to work shaft in wall, isolation it is described go out liquid section and it is described enter liquid section；
The rubber stopper forms the second bulge loop close to the position of the second end, and second bulge loop is used to be close to work shaft in wall,
Isolation it is described go out liquid section and it is described enter liquid section.
7. counterflush drilling system according to claim 6, which is characterized in that the top connection in first bulge loop and
Corresponding position is provided with wiper block between second bulge loop, and the wiper block is fixedly connected on the outer ring of the top connection.
8. a kind of counterflush drilling method, which is characterized in that using such as the described in any item counterflush drilling systems of claim 1-7
System, comprising steps of
A. upper one tripping in casing cementing after time wellbore finishing drilling is opened；
B. bored block different depth earth boring bit drilling depth is counted, bores estimated drilling depth number using average bit footage as every time
According to Di, select the drill bit and second drilling rod；
C. tripping in drilling tool, drilling tool depth of setting reach LiWhen, it is short that the circulation canal switching is installed on the top of second drilling rod
Section installs first drilling rod in the other end of circulation canal switching pipe nipple, and continuing lower brill makes the drill bit extend to shaft bottom,
Wherein, LiCompare DiBig 30m or more；
D. turn on pump realizes circulation, pressurization drilling to drilling fluid feed path supply drilling fluid.
9. counterflush drilling method according to claim 8, which is characterized in that further comprised the steps of: after the step d
E. when drilling depth is close to or up to DiWhen, first drilling rod is above mentioned, bores estimated drilling depth D according to next timei+1, adjust
The position of whole circulation canal switching pipe nipple is to Li+1, new institute is formed in the drilling rod that the circulation canal switches below pipe nipple
The second drilling rod is stated, new first drilling rod is installed above circulation canal switching pipe nipple；
F. step e described in repeating said steps a-.
10. counterflush drilling method according to claim 8, which is characterized in that when needing to restore direct flushing, on
First drilling rod, 30~50m is mentioned, position or the another set of circulation canal is installed again in well head among first drilling rod
Switch pipe nipple, lower brill, turn on pump realizes direct flushing, and after clean-out service, it is lower close to well above to propose the first drilling rod disassembly
The circulation canal of mouth switches pipe nipple, connects and is drilled into shaft bottom recovery reverse circulation drilling under new first drilling rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910689266.4A CN110344757B (en) | 2019-07-29 | 2019-07-29 | Reverse circulation well drilling system and reverse circulation well drilling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910689266.4A CN110344757B (en) | 2019-07-29 | 2019-07-29 | Reverse circulation well drilling system and reverse circulation well drilling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110344757A true CN110344757A (en) | 2019-10-18 |
| CN110344757B CN110344757B (en) | 2020-09-11 |
Family
ID=68180567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910689266.4A Active CN110344757B (en) | 2019-07-29 | 2019-07-29 | Reverse circulation well drilling system and reverse circulation well drilling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110344757B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111155929A (en) * | 2020-03-12 | 2020-05-15 | 中煤科工集团西安研究院有限公司 | Coal mine underground water hole prevention and control high-water-pressure water jacking directional drilling tool and drilling method |
| CN113236136A (en) * | 2021-04-22 | 2021-08-10 | 浙大城市学院 | Installation and operation method of full-process monitoring system of reverse circulation drilled pile |
| CN114278230A (en) * | 2021-12-30 | 2022-04-05 | 库尔勒施得石油技术服务有限公司 | Reverse circulation drill bit |
| CN111485843B (en) * | 2020-06-03 | 2024-04-30 | 中国石油天然气集团有限公司 | Automatic reversing two-way water hole grinding shoes |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011140426A1 (en) * | 2010-05-06 | 2011-11-10 | Smart Drilling And Completion, Inc. | Universal drilling and completion system |
| WO2011161250A3 (en) * | 2010-06-25 | 2013-01-10 | Reelwell As | Fluid partition unit |
| CN104343441A (en) * | 2014-09-29 | 2015-02-11 | 中国地质大学（武汉） | Bottom drilling parameter transmission system for ultra-deep well |
| WO2015023785A1 (en) * | 2013-08-13 | 2015-02-19 | Abrado, Inc. | Combination debris collection and visual validation assembly |
| US20160123116A1 (en) * | 2014-10-31 | 2016-05-05 | Spoked Solutions LLC | Systems and methods for managing debris in a well |
| CN106930710A (en) * | 2017-03-16 | 2017-07-07 | 新疆格瑞迪斯石油技术股份有限公司 | Counterflush drilling method |
| US20180112484A1 (en) * | 2016-10-21 | 2018-04-26 | Baker Hughes Incorporated | Wellhead based well control arrangement for upper plug and abandonment operations and method |
| CN108425651A (en) * | 2018-05-21 | 2018-08-21 | 广州海洋地质调查局 | It is a kind of for deep water without marine riser gas lift reverse circulation drilling well system and method |
| CN110029938A (en) * | 2018-01-12 | 2019-07-19 | 中石化石油工程技术服务有限公司 | A kind of air reverse circulation drilling method |
-
2019
- 2019-07-29 CN CN201910689266.4A patent/CN110344757B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011140426A1 (en) * | 2010-05-06 | 2011-11-10 | Smart Drilling And Completion, Inc. | Universal drilling and completion system |
| WO2011161250A3 (en) * | 2010-06-25 | 2013-01-10 | Reelwell As | Fluid partition unit |
| WO2015023785A1 (en) * | 2013-08-13 | 2015-02-19 | Abrado, Inc. | Combination debris collection and visual validation assembly |
| CN104343441A (en) * | 2014-09-29 | 2015-02-11 | 中国地质大学（武汉） | Bottom drilling parameter transmission system for ultra-deep well |
| US20160123116A1 (en) * | 2014-10-31 | 2016-05-05 | Spoked Solutions LLC | Systems and methods for managing debris in a well |
| US20180112484A1 (en) * | 2016-10-21 | 2018-04-26 | Baker Hughes Incorporated | Wellhead based well control arrangement for upper plug and abandonment operations and method |
| CN106930710A (en) * | 2017-03-16 | 2017-07-07 | 新疆格瑞迪斯石油技术股份有限公司 | Counterflush drilling method |
| CN110029938A (en) * | 2018-01-12 | 2019-07-19 | 中石化石油工程技术服务有限公司 | A kind of air reverse circulation drilling method |
| CN108425651A (en) * | 2018-05-21 | 2018-08-21 | 广州海洋地质调查局 | It is a kind of for deep water without marine riser gas lift reverse circulation drilling well system and method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111155929A (en) * | 2020-03-12 | 2020-05-15 | 中煤科工集团西安研究院有限公司 | Coal mine underground water hole prevention and control high-water-pressure water jacking directional drilling tool and drilling method |
| CN111155929B (en) * | 2020-03-12 | 2021-07-02 | 中煤科工集团西安研究院有限公司 | Coal mine underground water hole prevention and control high-water-pressure water jacking directional drilling tool and drilling method |
| CN111485843B (en) * | 2020-06-03 | 2024-04-30 | 中国石油天然气集团有限公司 | Automatic reversing two-way water hole grinding shoes |
| CN113236136A (en) * | 2021-04-22 | 2021-08-10 | 浙大城市学院 | Installation and operation method of full-process monitoring system of reverse circulation drilled pile |
| CN114278230A (en) * | 2021-12-30 | 2022-04-05 | 库尔勒施得石油技术服务有限公司 | Reverse circulation drill bit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110344757B (en) | 2020-09-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110344757A (en) | A kind of counterflush drilling system and counterflush drilling method | |
| CN105178859B (en) | A kind of self-priming reacting cycle gas drilling system of full well section for oil/gas drilling | |
| CN100354498C (en) | Air down-the-hole hammer coring casing drill | |
| CN205036295U (en) | Full well section is from inhaling anti - recycle gas drilling system of formula | |
| CN110344772A (en) | A kind of counterflush drilling circulation canal switching pipe nipple | |
| CN105178897B (en) | A kind of gas drilling manifold of ground attachment structure | |
| AU752439B2 (en) | Hydraulic underreamer and sections for use therein | |
| CN205036331U (en) | Anti - recycle gas well drilling drill tool combination structure | |
| CN105041241A (en) | Continuous direct cycle sand cleaning-out device for common oil pipes and technological method | |
| CN101144375A (en) | Horizontal well continuous sand flushing device | |
| CN105134114A (en) | Reverse circulation gas drilling tool combination structure | |
| CN205036327U (en) | Gas drilling ground manifold connection structure | |
| RU2136856C1 (en) | System for completion of well at separation of fluid media recovered from side wells having their internal ends connected with main well | |
| CN216950317U (en) | Piston type multi-activation bypass valve | |
| CN108979583A (en) | A kind of sidetracked hole layer and section cementing unit and application method | |
| US6223839B1 (en) | Hydraulic underreamer and sections for use therein | |
| CN113863879B (en) | Gas reverse circulation well drilling is with diverging device | |
| CN114856495A (en) | Underground device for testing gas-water output profile of coal bed gas combined production well | |
| CN100393979C (en) | Hydraulic underreamer and sections for use therein | |
| CN204627487U (en) | The pipe integrated instrument of dredging, scraping | |
| CN110700762A (en) | Drill bit mud bag flushing assistor while drilling | |
| CN211448541U (en) | Horizontal well leak-stopping water-plugging pipe column | |
| CN113266269B (en) | Drill rod power head device, circulating device and drilling machine | |
| CN214997467U (en) | Erosion-resistant drill bit | |
| CN217558253U (en) | Negative pressure type water conservancy system of single cone bit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |