CN108425651A - It is a kind of for deep water without marine riser gas lift reverse circulation drilling well system and method - Google Patents
It is a kind of for deep water without marine riser gas lift reverse circulation drilling well system and method Download PDFInfo
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- CN108425651A CN108425651A CN201810488673.4A CN201810488673A CN108425651A CN 108425651 A CN108425651 A CN 108425651A CN 201810488673 A CN201810488673 A CN 201810488673A CN 108425651 A CN108425651 A CN 108425651A
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- 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
- E21B21/16—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using gaseous fluids
Abstract
The present invention relates to a kind of for deep water without marine riser gas lift reverse circulation drilling well system and method, including slurry injection system and gaslift reverse cycle coring drilling system；The slurry injection system includes sequentially connected returning to cone, flow in pipes, mud injection pump and slurry tank；The gas lift reverse circulation core-drilling system includes air compressor, air water tap, double-wall drill pipe, gas-water mixer and single wall drilling rod, air compressor is connect with air water tap, air water tap lower end is connect with double-wall drill pipe, the lower end of double-wall drill pipe is separately connected with gas-water mixer, the lower end of gas-water mixer is connect with single wall drilling rod, and the cone that returns to is arranged on the outer wall that drilling rod connects.The present invention is not necessarily to water proof measure, realizes mud cycle and the protection borehole wall in drilling, can be applied to the arbitrary depth of water；Rock core and landwaste are conveyed using gas lift reverse circulation principle, reduce construction time and cost；Reduce the requirement to mud injection pump, good reliability.
Description
Technical field
The present invention relates to oil gas drilling technical field, it is specifically a kind of for deep water without marine riser gas lift reverse circulation drilling well
System and method.
Background technology
Nowadays, the depth of water for being related to oil-gas exploration is increasingly deeper, and drilling depth is even more than several kms, conventional ocean
In deepwater drilling, the method for the closed circuit drilling well of generally use marine riser direct circulation or drilling well of opening a way without marine riser direct circulation is above
Existing well system and the equal Shortcomings of method：1) use marine riser well system mating complicated, complicated for operation, load effect
When in well head soft formation, influencing well head stability, and keeping mud (also known as drilling fluid) closed cycle in conventional marine riser, cause
Mud cycle pressure drop increases, and causes greatly to restrict to the construction of narrow space Density Window, to closed circuit drilling well-head leakproofness
It is required that it is very strict, and the emergency release program for meeting emergency case is complicated, and risk is high；2) it is returned using conventional open circuit direct circulation
Turn, open circuit drilling mud is flow to by drilling rod from drill bit from ship, and the annular space between drilling rod and the borehole wall, annular space are flowed out to by hydrophthalmia
Without closed loop, mud is directly discharged to from well head in seawater, and not only mud consumption is very big, and mud is of high cost, and drilling fluid
Directly row sea pollutes environment；If it is counterflush drilling system, the common pump pressure reacting cycle of existing method needs powerful
Injection pumping system mud is continuously injected into annular space, then by Transport of Drilling Cutting In A from drill bit enter drilling rod up to
It returning out, this will propose that very high requirement needs the depth of water for flowing through several kms if applying to deep-sea to the ability of injection pump,
The power cutting carring that such injection pump provides, which flows through several kms and returns out, seems extremely difficult, cost and risk higher；3) well
It is easy to be impacted by mud at wall especially well head, stability cannot get effective guarantee, and mud speed rate is insufficient, causes in drilling
Landwaste carry effect it is poor, easily cause bit freezing, rock core is easy chip off-falling, and the quality of core sample is difficult to ensure；4) gas lift reverse circulation
Technology is usually applied to Hydrology geology well, well is often used, but these well depths only have hundreds of meters, and abyssal environment
Under, need the on-way resistance for overcoming several kms, conventional configuration to be difficult to meet deep-sea requirement.
Invention content
In view of the deficiencies of the prior art, the present invention provide it is a kind of based on circulating fluid without the quick core drilling of marine riser
System can solve the problems, such as that drilling well is difficult under deepwater environment, the problem for especially requiring injection pump energy high.
The technical scheme is that：It is a kind of for deep water without marine riser gas lift reverse circulation drilling well system, feature exists
In：Including slurry injection system and gaslift reverse cycle coring drilling system；The slurry injection system includes sequentially connected heavy
Return cone, flow in pipes, mud injection pump and slurry tank；The gas lift reverse circulation core-drilling system includes air compressor, gas
Tap, double-wall drill pipe gas-water mixer and single wall drilling rod, air compressor are connect with the upper end of air water tap, double-wall drill pipe
The lower end of the gentle tap in upper end connects, and the lower end of double-wall drill pipe is connected with the upper end of gas-water mixer, under gas-water mixer
End is connect with single wall drilling rod, and the single wall drilling rod is connect with core bit, and single wall drilling rod is passed through from the lumen for returning to cone, returns to cone
Inner wall and the outer wall of single wall drilling rod between form annular region；Connection is driven in the upper end of the air water tap with top, and top, which is driven, to be passed through
Pipeline is connect with sampler, and sampler is used to store the core sample obtained；Air compressor passes through double-wall drill pipe outer tube
Gas access is formed between gas-water mixer, forms mud circulation passage between mud injection pump and gas-water mixer, and air water is mixed
Clutch forms access by double-wall drill pipe inner tube and sampler.
Further, the flow in pipes is equipped with flow control valve, the mud pressure for controlling flow in flow in pipes
Power and flow.
Further, the cone that returns to is equipped with preventer.
Further, air inlet non-return valve is equipped between the air compressor and air water tap, for preventing compressed air
Reverse flow.
Further, it is described top drive by push up drive on interface connect with pipeline, pipeline is connect with sampler, push up drive and
The junction of interface is equipped with the blowout joint for preventing mud from spraying.
A method of for deep water without marine riser gas lift reverse circulation drilling well system, include the following steps：
S1：Cone will be returned to and preventer is put into the well of seabed hole well in word, and be fixed；
S2：By mud injection pump and cone connection is returned to by flow in pipes, and flow control is installed on mud injection pump
Valve, slush pump are connect with slurry tank；
S3：It being attached between sampler and top are driven, air compressor is connect by pipeline with air water tap, and
Gas non-return valve is installed on pipeline, the upper end of double-wall drill pipe is connect with air water tap, the lower end of double-wall drill pipe and gas-water mixer
Connection, gas-water mixer are connect with single wall drilling rod, and single wall drilling rod is passed through out of lumen that reset cone；
S4：It is all connected with after installation is complete with upper-part, starts mud injection pump, mud is returned to by flow in pipes feeding
In cone and drilling rod, then, mud enters in gas-water mixer；Start air compressor, by compressed air after double-wall drill pipe
Into in gas-water mixer, in gas-water mixer, compressed air mixes the density reduction so that mud with mud, and in double-walled
Fluid column between the pipe of drilling rod is inside and outside forms pressure difference, is mixed with the mud of compressed air along double-wall drill pipe inner tube, air water tap
It drives and flows up with top, eventually enter into sampler；
S5:Sampler separates landwaste and core sample, and the mud after separating treatment is re-injected into mud
In tank, recycling for mud is formed, realizes the constantly continuous drilling of cycle and coring.
Further, compressed air and mud are mixed in the gas-water mixer, and inside and outside the pipe of double-wall drill pipe
Pressure difference is formed between fluid column, the mud that driving is located in double-wall drill pipe lifts upwards.
Beneficial effects of the present invention are：
(1) special water proof measure is not necessarily to, it can be achieved that mud recycles and protects the borehole wall in drilling, and can be applied to arbitrary water
It is deep, even if the depth of water still can be used normally if being more than a few kms；
(2) it uses gas lift reverse circulation principle and then realizes that continuous conveying rock core and landwaste, drilling construction will not be because of corings
Operation and interrupt, construction non-cutting time is short, ultrahigh in efficiency, therefore significantly reduces construction time and cost；Creep into the rock core generated
Rig floor is returned to in landwaste whole, the product that imitate with will not causing missing；
(3) deep water slurry injection system can accurately control the pressure and flow of injection mud, and construction risk is low, air water
The density contrast that mixing generates is about to mud certainly and is taken out of, and the Capability Requirement to mud injection pump is reduced, anti-compared to conventional pump pressure
Cycle, cost-effective, good reliability.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
In figure, 1- drives on top, 2- air waters tap, 3- blowout joints control cable, 4- slurry tanks, 5- mud injection pump, 6- flows
Control valve, 7- preventers control cable, 8- core bits, 9- single walls drilling rod, 10- preventers, 11- return to cone, 12- mixing wastewater with air
Device, 13- double-wall drill pipes, 14- air compressors, 15- samplers, 16- air inlets non-return valve, 17- blowout joints, 18- double-walleds bore
Bar inner tube, 19- flow in pipes, 20- double-wall drill pipe outer tubes.
Specific implementation mode
In the following, in conjunction with attached drawing and specific implementation mode, the present invention is described further：
As shown in Figure 1, it is a kind of for deep water without marine riser gas lift reverse circulation drilling well system, including slurry injection system and
Gas lift reverse circulation core-drilling system；The slurry injection system include it is sequentially connected return to cone 11, flow in pipes 19 and
Mud injection pump 5 on the drilling ship of sea and slurry tank 4, the mud being stored in slurry tank 4 are inhaled by mud injection pump 5
After entering, it is fed through and is returned in cone 11 along flow in pipes 19；The gas lift reverse circulation core-drilling system includes air compressor
14, air water tap 2, double-wall drill pipe 13, double-wall drill pipe inner tube 18, gas-water mixer 12, single wall drilling rod 9 and core bit 8, air
Compressor 14 is connect with the mountain loneliness of air water tap 2 by pipeline and compressed air is fed through in air water tap 2, double-wall drill pipe
13 include double-wall drill pipe inner tube 20 and double-wall drill pipe inner tube 18, and the upper end of double-wall drill pipe 13 connects with the lower end of air water tap 2 respectively
It connects, air water tap 2 is mutual indepedent with the communicating passage of double-wall drill pipe inner tube 20 and double-wall drill pipe inner tube 18, under double-wall drill pipe 13
End is separately connected with the upper end of gas-water mixer 12, gas-water mixer 12 and double-wall drill pipe inner tube 20 and double-wall drill pipe inner tube 18
Communicating passage is mutual indepedent, and the lower end of gas-water mixer 12 is connect with single wall drilling rod 9, and the single wall drilling rod 9 connects with core bit 8
Connect, single wall drilling rod 9 from return to cone 11 lumen pass through, return to cone 11 inner wall and the outer wall of single wall drilling rod 9 between form annular space
Region；The upper end of the air water tap 2 is driven 1 with top and is connect, and top is driven 1 and filled by pipeline and the sampling being arranged on the drill ship of sea
15 connections are set, sampler 15 is used to store the core sample obtained.
In the present embodiment, mud injection pump 5 is equipped with flow control valve 6 with the flow in pipes 19 that cone 11 is connect is returned to,
Mud pressure and flow for controlling flow in flow in pipes 19；It returns to cone 11 and is equipped with preventer 10, preventer 10 passes through
Preventer control cable 7 is connect with sea drill ship, so as to control preventer 10, preventer 10 could be provided as it is multiple, it is excellent
It is selected as two；Air inlet non-return valve 16 is equipped between air compressor 14 and air water tap 2, air inlet non-return valve 16 is arranged in pipeline
On, for preventing compressed air out of air water leading 2 reverse flows to air compressor 14；1 is driven by pushing up the interface driven on 1 in top
It is connect with pipeline, pipeline is connect with sampler 15 again, and top drive 1 and the junction of interface are equipped with blowout joint 17, for preventing
Mud sprays, and blowout joint 17 controls cable 3 by blowout joint 17 and connect with sea drill ship, so as to control blowout joint
The operations such as 17 rotations.
When specifically used, the mud being stored in slurry tank 4 is fed through in flow in pipes 19 by mud injection pump 5, warp
After overcurrent control valve 6 controls pressure and the flow of mud, mud, which is fed through, to be returned in cone 11, and flowing downward to enter is located at
Single wall drilling rod 9 in well and the annular region between cone 11 is returned to, core bit 8 can also mix during drilling well obtains rock core
Entering some landwaste, landwaste and rock core, which are mixed into, to be flowed up into mud together to the lumen channel of single wall drilling rod 9, until
Into in gas-water mixer 12；On the other hand, compressed air is sent into double-wall drill pipe 13 by air compressor 14 by air water tap 2
Lumen channel in, compressed air, which flows downward, to be entered to gas-water mixer 12 and is mutually mixed with the mud in gas-water mixer 12
It closes；Compressed air enters via after gas-water mixer 12 in double-wall drill pipe 13, is mixed to form with mud more lower than mud density
Gas-liquid mixing liquid makes the fluid density inside and outside the pipe of double-wall drill pipe 13 produce difference, so inside and outside the pipe of double-wall drill pipe it
Between form pressure difference, to gas lift reverse circulation, reduce the Capability Requirement to mud injection pump 5, can to transport in lower power
Mud and rock core, can also be fed through in sampler 15, compared to traditional pump pressure reacting cycle by the mud injection pump 5 under row
More cost-effective, reliability higher；Under such differential pressure action, the mud that driving is located at lower part in pipe lifts upwards so that
Mud in the outer annular region of single wall drilling rod 9 in well enters the inner cavity of single wall drilling rod 9, and after to gas-water mixer 12
Into in double-wall drill pipe inner tube 18, the mud for being mixed with compressed air is flowed up along inner tube 18, air water tap 2 and top drive 1,
Sampler 15 is eventually entered into, sampler 15 separates landwaste and core sample, again by the mud after separating treatment
It is injected into slurry tank 4, forms recycling for mud, and then realize the constantly continuous drilling of cycle and coring.
Air compressor is corresponded to by forming gas access between double-wall drill pipe and gas-water mixer three shown in Fig. 1
Arrow indicates the direction of air flowing, and mud circulation passage is formed between mud injection pump and gas-water mixer, corresponds to Fig. 1
Shown in single arrow, indicate the direction of mud, gas-water mixer forms access by double-wall drill pipe inner tube and sampler, right
The double-head arrow shown in Fig. 1, expression have been mixed into the mud flow direction after air,
The boring method of the present invention, specifically includes following steps：
S1：Cone 11 will be returned to and preventer 10 is placed in the well (not shown) in word of seabed hole well, and be fixed.
S2：Mud injection pump 5 is connect with cone 11 is returned to by flow in pipes 19, and is installed on mud injection pump 5
Flow control valve 6, slush pump are connect with slurry tank 4 so that mud injection pump 5 inputs the mud in slurry tank 4 by pipeline
It is bored in 11 to returning to.
S3：Will sampler 15 and top drive 1 between be attached, air compressor 14 by pipeline (not shown) with
Air water tap 2 connects, and gas non-return valve 16 is installed on pipeline, and the upper end of double-wall drill pipe 13 is connect with air water tap 2, double-walled
The lower end of drilling rod 13 is connect with gas-water mixer 12, and gas-water mixer 12 is connect with single wall drilling rod 9, and single wall drilling rod 9 is bored from playback
Lumen in pass through；So that forming gas access, mud between air compressor 14 and gas-water mixer 12 after the completion of the above connection
Mud circulation passage is formed between injection pump 5 and gas-water mixer 12, gas-water mixer 12 passes through inner tube 18 and sampler 15
Form access.
S4：It is all connected with after installation is complete with upper-part, starts mud injection pump 5, mud is sent by flow in pipes 19
It returns in cone 11 and drilling rod, then, mud enters in gas-water mixer 12；Start air compressor 14, compressed air is passed through
Enter in gas-water mixer 12 after double-wall drill pipe 13, in gas-water mixer 12, compressed air is mixed with mud makes mud
Density reduces, and forms pressure difference between the fluid column in the intraluminal fluid column and gas-water mixer 12 of single wall drilling rod 99, is mixed with pressure
The mud of contracting air drives 1 along inner tube 18, air water tap 2 and top and flows up, and eventually enters into sampler 15.
S5:Sampler 15 separates landwaste and core sample, and the mud after separating treatment is re-injected into mud
It starches in tank 4, forms recycling for mud, realize the constantly continuous drilling of cycle and coring.
For those skilled in the art, technical solution that can be as described above and design are made other each
Kind is corresponding to be changed and deforms, and all these change and deform the protection model that should all belong to the claims in the present invention
Within enclosing.
Claims (7)
1. it is a kind of for deep water without marine riser gas lift reverse circulation drilling well system, it is characterised in that：Including slurry injection system and
Gas lift reverse circulation core-drilling system；The slurry injection system includes that sequentially connected cone, flow in pipes, the mud of returning to injects
Pump and slurry tank；The gas lift reverse circulation core-drilling system includes air compressor, air water tap, double-wall drill pipe mixing wastewater with air
Device and single wall drilling rod, air compressor are connect with the upper end of air water tap, and the lower end of the gentle tap in upper end of double-wall drill pipe connects
It connects, the lower end of double-wall drill pipe is connected with the upper end of gas-water mixer, and the lower end of gas-water mixer is connect with single wall drilling rod, the list
Wall drilling rod is connect with core bit, and single wall drilling rod is passed through from the lumen for returning to cone, returns to the outer wall of the inner wall and single wall drilling rod of cone
Between form annular region；Connection is driven in the upper end of the air water tap with top, and top is driven and connect with sampler by pipeline, samples
Device is used to store the core sample obtained；Air compressor is logical by forming gas between double-wall drill pipe outer tube and gas-water mixer
Road, between mud injection pump and gas-water mixer formed mud circulation passage, gas-water mixer by double-wall drill pipe inner tube with take
Sampling device forms access.
2. it is according to claim 1 for deep water without marine riser gas lift reverse circulation drilling well system, it is characterised in that：It is described
Flow in pipes is equipped with flow control valve, mud pressure and flow for controlling flow in flow in pipes.
3. it is according to claim 1 for deep water without marine riser gas lift reverse circulation drilling well system, it is characterised in that：It is described
It returns to cone and is equipped with preventer.
4. it is according to claim 1 for deep water without marine riser gas lift reverse circulation drilling well system, it is characterised in that：It is described
Air inlet non-return valve is equipped between air compressor and air water tap, for preventing compressed air reverse flow.
5. it is according to claim 1 for deep water without marine riser gas lift reverse circulation drilling well system, it is characterised in that：It is described
Top, which is driven, to be connect by pushing up the interface on driving with pipeline, and pipeline is connect with sampler, and top is driven to be equipped with the junction of interface and is used for
The blowout joint for preventing mud from spraying.
6. the method without marine riser gas lift reverse circulation drilling well system according to any one of claims 1 to 5 for deep water,
It is characterized in that：Include the following steps：
S1：Cone will be returned to and preventer is put into the well of seabed hole well in word, and be fixed；
S2：By mud injection pump and cone connection is returned to by flow in pipes, and flow control valve, mud are installed on mud injection pump
Stock pump is connect with slurry tank；
S3：It is attached between sampler and top are driven, air compressor is connect by pipeline with air water tap, and in pipeline
On be installed into gas non-return valve, the upper end of double-wall drill pipe is connect with air water tap, and the lower end of double-wall drill pipe is connect with gas-water mixer,
Gas-water mixer is connect with single wall drilling rod, and single wall drilling rod is passed through out of lumen that reset cone；
S4：Be all connected with after installation is complete with upper-part, start mud injection pump, by mud by flow in pipes feeding return to cone and
In drilling rod, then, mud enters in gas-water mixer；Start air compressor, compressed air is entered after double-wall drill pipe
In gas-water mixer, in gas-water mixer, compressed air mixes the density reduction so that mud with mud, and in double-wall drill pipe
Pipe it is inside and outside between fluid column form pressure difference, be mixed with the mud of compressed air along double-wall drill pipe inner tube, air water tap and top
Drive flows up, and eventually enters into sampler；
S5:Sampler separates landwaste and core sample, and the mud after separating treatment is re-injected into slurry tank,
Recycling for mud is formed, realizes the constantly continuous drilling of cycle and coring.
7. the method without marine riser gas lift reverse circulation drilling well system according to claim 6 for deep water, feature exists
In：It is mixed with compressed air and mud in the gas-water mixer, and forms pressure between the fluid column inside and outside the pipe of double-wall drill pipe
Difference, the mud that driving is located in double-wall drill pipe lift upwards.
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| CN109281616A (en) * | 2018-11-20 | 2019-01-29 | 常州大学 | A kind of straight well double-wall drill pipe system large rock-carrying ability measurement device and measuring method |
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| CN109556981A (en) * | 2018-11-20 | 2019-04-02 | 常州大学 | A kind of horizontal well double-wall drill pipe flushes corrosion experimental device and experimental method |
| CN109763771A (en) * | 2019-01-16 | 2019-05-17 | 西南石油大学 | One kind being based on the electrically driven (operated) double-gradient well drilling system and method for coiled tubing |
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| CN109281616A (en) * | 2018-11-20 | 2019-01-29 | 常州大学 | A kind of straight well double-wall drill pipe system large rock-carrying ability measurement device and measuring method |
| CN109540717A (en) * | 2018-11-20 | 2019-03-29 | 常州大学 | A kind of straight well double-wall drill pipe flushes corrosion experimental device and experimental method |
| CN109556981A (en) * | 2018-11-20 | 2019-04-02 | 常州大学 | A kind of horizontal well double-wall drill pipe flushes corrosion experimental device and experimental method |
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| CN109763771A (en) * | 2019-01-16 | 2019-05-17 | 西南石油大学 | One kind being based on the electrically driven (operated) double-gradient well drilling system and method for coiled tubing |
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| CN114075937B (en) * | 2020-08-14 | 2023-07-25 | 中国石油天然气股份有限公司 | Control method and device for flushing and bailing sand by adopting double-wall drill rod |
| CN113250616A (en) * | 2021-06-28 | 2021-08-13 | 中国石油大学(北京) | Deepwater pressure control drilling system |
| CN113309479A (en) * | 2021-07-12 | 2021-08-27 | 中国地质科学院勘探技术研究所 | Efficient coring drilling device and method for shallow sea reef limestone |
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