CN105089609B - Method for controlling wellbore pressure - Google Patents
Method for controlling wellbore pressure Download PDFInfo
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- CN105089609B CN105089609B CN201410158922.5A CN201410158922A CN105089609B CN 105089609 B CN105089609 B CN 105089609B CN 201410158922 A CN201410158922 A CN 201410158922A CN 105089609 B CN105089609 B CN 105089609B
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Abstract
The present invention relates to field of oil drilling.The present invention proposes a kind of method for controlling wellbore pressure, comprises the following steps：Step a, sets a kind of equipment for controlling wellbore pressure；Step b, being pumped at least two from well head has the mud of different fluid density, and the fluid of at least double gradients is obtained in drilling rod；Step c, wellbore parameters are detected by the measurement sensor；Step d, according to detected wellbore parameters, is controlled the pressure influence element to shut down, be rotated in a first direction by controller or is rotated along opposite to that second direction.Pass through the method for controlling wellbore pressure according to the present invention, first according to detected wellbore parameters, the wellbore conditions on whole longitudinal direction can be controlled in real time, then element is influenceed by controller control pressure, and unified, overall control is realized on the longitudinal direction of pit shaft.
Description
Technical field
The present invention relates to oil and gas development drilling technology field, more particularly to a kind of method for controlling wellbore pressure.
Background technology
In order to reach improve rate of penetration, reduce reservoir pollution, avoid mud leakage, increase hole stability, control overflow
The purposes such as well kick, managed pressure drilling and well control technique turn into the hot fields during domestic and international drilling well is studied in recent years.
HydroPulseTM impulse tools of the prior art are using the opening and closing of flow circuit valve valve come interval
Block to flow likes, impulsive force is applied to drill bit, so as to form suction pressure pulse, produce suction pulse drilling well effect.
In the prior art, have been based on wall-attached jet principle and have developed underbalance pulse instrument, its general principle is：When
Volume inhales the liquid in lie when high speed liquid flow passes through nozzle, flows up it, now on the stress surface of valve, valve body is pushed away
It is dynamic to move down, until closing, due to the instantaneous interruption of liquid stream, negative relative area is just generated near the drill bit of shaft bottom.
Also there is Anderhammer instruments in the prior art, its operation principle is then：Drilling fluid enters to become a mandarin by top connection
Shunted after the nozzle of road disk, be partly into the annular space of bushing and cylinder, be partly into stator liner and carry out drive screw
Rotation, and continue traveling downwardly, converge in sleeve with another part drilling fluid, then via the radial flow path of rotary middle spindle upper end
Mouth enters moushroom valve in central shaft, flow direction, and the rotation of upper moushroom valve makes to close when opening during the runner of moushroom valve and lower moushroom valve, and liquid stream is this
In the case of will occur and close, boost, open then pressure release, thus produce pulsing jet and pulse.
Above-mentioned 3 kinds of instruments are only capable of influenceing bottom pressure formation.
For some insoluble problems in under-balanced drilling technology at sea drilling well, it further developed in recent years more
Complicated function simultaneously more powerful managed pressure drilling（MPD）Technology and control drilling fluid cap（CMC）Drilling technology.Control pressure
Power drilling well（MPD）Technology is by under balance pressure drilling（UBD）The new technology that technology and power drilling well technological synthesis grow up,
It, by the simulation program of fluid power well come feedback data, predicts annular pressure section using the circulation of drilling fluid equipment of closing, from
And automatic pressure control equipment is automatically adjusted choke valve, minor adjustments amount is produced accurately to control the annular pressure of whole well
Section.It is managed pressure drilling to control drilling fluid cap (CMC) drilling technology（MPD）New hair of the technology in deepwater drilling application
Exhibition, it can be as open cycle equipment operation, again can be as enclosed circulation equipment operation, while using heavier drilling well
Liquid, lifts pumping unit by underwater drilling liquid and adjusts position of the drilling fluid cap in marine riser, so as to quickly and accurately adjust well
Bottom pressure.
The problem of there is three aspects with equipment in these above-mentioned instruments：One is Some tools and equipment is drilling well by flowing
Liquid directly drives, and this mode is only capable of influenceing bottom pressure formation；Two be need take drilling equipment it is limited provide utilization
Circulating pressure, i.e., produce Stress control effect while, the reduction of bit pressuredrop will necessarily be caused, so as to influence drill bit water
Horsepower and hydraulic blow power, have a negative impact to broken rock；Three be once drilling pump failure, or recycle unit are let out
Leakage（Including ocean sleeve pipe）, borehole pressure section will change immediately, and this is likely to result in occurring leakage, overflow, well slough etc.
Complicated situation.
The content of the invention
As described above, there are the following problems in the prior art：First, in the prior art for controlling the instrument of wellbore pressure
It is only capable of influenceing bottom pressure formation, it is impossible to realize unified, overall control on the longitudinal direction of pit shaft；Secondly, existing skill
In art be used for control wellbore pressure instrument need take drilling equipment it is limited provide the circulating pressure utilized, will necessarily cause
The reduction of bit pressuredrop, has a negative impact；Again, once drilling pump breaks down, or recycle unit is leaked（Including
Ocean sleeve pipe）, borehole pressure section will change immediately, and this is likely to result in occurring the complicated feelings such as leakage, overflow, well slough
Condition, and wellbore pressure of the prior art control tool and method in time, can not be tackled effectively.
Accordingly, the present invention proposes a kind of method for controlling wellbore pressure, and it can not only be to the pressure of full pit shaft
Implement control, and independent of mud recycle unit, can independent effect.
The present invention proposes a kind of method for controlling wellbore pressure, comprises the following steps：Step a, sets a kind of use
In the equipment of control wellbore pressure, including at least one measurement sensor and at least one pressure influence member on drilling rod
Part, and for controlling the controller of the pressure influence element, the measurement sensor sends out detected wellbore parameters
Give the controller, the controller controls the pressure influence element to shut down according to the wellbore parameters received, along first
Direction rotates or rotated along opposite to that second direction；Step b, being pumped at least two from well head has different fluid density
Mud, obtains the fluid of at least double gradients in drilling rod；Step c, wellbore parameters are detected by the measurement sensor；Step d,
According to detected wellbore parameters, control the pressure influence element to shut down, be rotated in a first direction by controller or along with
Its opposite second direction is rotated.
, can first according to detected wellbore parameters by the method for controlling wellbore pressure according to the present invention
To control the wellbore conditions on whole longitudinal direction in real time, then by controller control pressure influence element, in the longitudinal direction of pit shaft
Unified, overall control is realized on direction.Meanwhile, the running of method and apparatus according to the invention is independently of mud cyclic system
System, it is not necessary to consume fluid power, it is ensured that the fluid power needed for drill bit.Fluid with many gradients, it can be advantageous to needed for being formed
Pressure traverse.
Preferably, when wellbore parameters are shown as normal drilling, the pressure influence element is controlled by the controller
Shut down；When the wellbore parameters detected by specific measurement sensor are shown as occurring leakage, controlled by the controller
It is rotated in a first direction adjacent to the pressure influence element of the specific measurement sensor；When specific measurement sensor is examined
When the wellbore parameters measured are shown as occurring overflow, by controller control adjacent to the specific measurement sensor
Pressure influence element is rotated in a second direction,.
As can be seen here, once drilling pump breaks down, or recycle unit is leaked, and borehole pressure section will be sent out immediately
Raw to change, this is likely to result in occurring the complicated situation such as leakage, overflow, well slough, and can by the method according to the invention
In time, effectively tackled.Different counte-rplan are taken respectively for normal drilling, leakage and overflow.
Preferably, when the pressure influence element is rotated in a first direction, annular space liquid column hydrostatic pressure and stratum in pit shaft
Difference between fracture pressure reduces, when the pressure influence element is rotated in a second direction, annular space hydrostatic column pressure in pit shaft
Difference increase between power and formation fracture pressure.By changing the difference, it can alleviate or even eliminate by leakage or overflow
Caused influence.
Preferably, the occurring with a distance from location point and annular space in pit shaft from leakage or overflow according to the pressure influence element
The difference of the flow of liquid stream, the rotating speed and rotation time of the pressure influence element are adjusted by the controller.So may be used
To implement more accurately to control, clearly, strain is flexible for purpose.
Preferably, with generation location point of the pressure influence element away from leakage or overflow, the controller is passed through
The velocity of rotation of the pressure influence element is controlled, it is gradually decrease to zero.It can so implement more accurately to control, purpose
Property clearly, strain is flexible.
Preferably, the wellbore parameters measured by the measurement sensor include flow, pressure, density and temperature.
Wellbore parameters in this scheme are for controlling the integrality of pit shaft more important.
Preferably, the density of fluid is from top to bottom monotonically changed in different gradients.
Preferably, in stepb, mud is pumped into as follows, that is, causes pressure traverse in the drill string in whole pit shaft
For piecewise linearity or meet curved profile set in advance.Such the method according to the invention is applicable to a variety of different wells
Cylinder operation, adds its applicability.
Preferably, the equipment also includes the guider for being used to adjust drill bit direction, and the controller is according to from institute
The parameter for stating sensor judges to assign the instruction for direction to the guider after wellbore conditions.So can also be while complete
The function that whole drilling rod is oriented in pairs.
Preferably, the equipment also includes the well head power and information carrying means for being used to introduce external power, passes through institute
State well head power and information carrying means and provide power to the equipment.In this scheme, the running tool of whole equipment and method
There is independent power providing system, even if can also be operated without hindrance when occurring underground unexpected situation.
According to the method for controlling wellbore pressure of the present invention, the pressure of full pit shaft can not only be implemented to control, and
And due to measurement sensor and pressure influence element power can by outside introducing, therefore the method according to the invention running not
Mud recycle unit is relied on, deficiency pointed in background technology is compensate for.
Above-mentioned each technical scheme can be combined with each other in any technically feasible mode, or be replaced with equivalent part
Change, as long as the purpose of the present invention can be reached and will not be collided with each other.
Brief description of the drawings
Hereinafter the present invention will in more detail be retouched based on only non-limiting embodiment and refer to the attached drawing
State.Wherein：
Fig. 1 is the schematic diagram for being used to control the equipment of wellbore pressure according to the present invention；
According to the present invention for controlling wellbore pressure when wellbore pressure influence element does not work when Fig. 2 is normal drilling
The diagrammatic cross-section of the underground part of equipment；
According to the present invention for controlling pit shaft pressure when wellbore pressure influence element is rotated in a first direction when Fig. 3 is leakage
The diagrammatic cross-section of the underground part of the equipment of power；
According to the present invention for controlling pit shaft pressure when wellbore pressure influence element is rotated in a second direction, when Fig. 4 is overflow
The diagrammatic cross-section of the underground part of the equipment of power.
In figure, identical component is indicated by identical reference.Accompanying drawing is not drawn according to actual ratio.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.The present invention proposes a kind of for controlling wellbore pressure
Equipment 20 and corresponding method.
Fig. 1 shows one embodiment for being used to control the equipment 20 of wellbore pressure according to the present invention.
As shown in figure 1, this is used to control the equipment 20 of wellbore pressure to include being arranged on the drilling rod 5 being driven into the earth's crust 4
Be used to measure the measurement sensor 6 of downhole parameters and the pressure influence element 7 of wellbore pressure situation can be adjusted.
Wherein drilling rod 5 has power and signal transfer functions.Power and signal transmission in current drilling rod are essentially by having
Line mode is completed, however, on the premise of it ensure that power and signal stabilization transmission, it would however also be possible to employ wireless mode enters
OK.
Measurement sensor 6 and the installation site and quantity of pressure influence element 7 are needed to relay amplification most by information transfer
Remote and special layers position needs the distance encrypted to determine.
The type of measurement sensor 6 can need selection according to measurement, can be for example for measuring annular space local pressure
Pressure sensor, and acoustic emission sensor for measuring crustal stress etc..Its specific form can also be data acquisition
Card.In view of its measurement for scene to pressure, target formula pressure sensor can be used.The measurement process of target formula pressure sensor
It is target body position is changed by the size of the impulse force of fluid, the change of target body position can change the size of output current,
So as to measure down-hole pressure size.
In the present embodiment, measurement sensor 6 is measuring multiple parameters sensor.Parameter measured by measurement sensor 6 is for example
Including flow, pressure, density and temperature.These parameters have effect for determining and regulating and controlling wellbore conditions.
Pressure influence element 7 can be such as turbine pump or other types of pump.That is, pressure influence element 7
Concrete form can be using turbine pump, axial-flow pump, vane pump and plunger pump etc..
The discharge capacity of the pressure influence element 7 of diverse location can be determined by the concrete condition of the pressure distribution of the earth's crust 4.It is preferred that
Ground, influence to pressure is by the way that the discharge capacity for being pumped into region is how many and density of mud is determined, being pumped into or pump out can be by pressure
Influence element 7（For example, turbine pump）Rotating determine.
The guiding dress in the direction for controlling drill bit 9 is also included according to the equipment 20 for being used to control wellbore pressure of the present invention
Put 8 and the ground for controlling the pressure influence element 7 and being connected by power and transmission line of information 3 with underground part
Information processing mechanism 10（That is controller）.In the embodiment shown by Fig. 1, it be there is also mounted in well head for introducing external power
Well head power and information carrying means 2.The pressure control equipment 20 is installed in Conventional drilling equipment 1 to use.
When operation when being used to control the equipment 20 of wellbore pressure, in the embodiment shown in fig. 1, is utilized according to the present invention
Measurement sensor 6 monitors whole pit shaft in real time, and the stratum obtained and drilling parameter information are passed through with signal transfer functions
Drilling rod 5, well head power and information carrying means 2 and power and signal transmssion line 3 pass to terrestrial information processing mechanism 10.Ground
Information processing mechanism 10 is according to the measurement sensor 6 of diverse location（Such as flow sensor and displacement transducer）Measured liquid
The parameter such as the flow of stream and direction, it may be determined that overflow that the situation of underground, such as borehole wall occur or the position of leakage and big
It is small.Terrestrial information processing mechanism 10 positioned at ground（That is controller）Can according to the situation of the whole pit shaft grasped in real time, and
When assign adjust instruction, control the pressure influence element 7 of diverse location to adjust wellbore pressure.Specifically, for example in pressure
Element 7 is influenceed in the case of turbine pump, drilling rod 5 and ground can be adjusted by making rotation of the pressure influence element 7 along different directions
The pressure distribution of annular space between layer 4, forms a wellbore pressure profile control equipment, realize underbalance, nearly balance or
Overbalance Drilling operation.In this embodiment, terrestrial information processing mechanism 10 can handle much information, complete a variety of functions, and
Ground processor structure 10 can be modified at any time, for example, set different functions, completed not according to identical parameter
Same control so that according to the present invention for controlling the equipment of wellbore pressure to be adapted well to different underground rings
Border.
Instruction from controller can also feed back to underground guider 8 simultaneously, to adjust the direction of drill bit 9, protect
Demonstrate,prove drillng operation safe, smooth.
According to the present invention, the energy of measurement sensor 6 and pressure influence element 7 can be by the external power source process located at ground
Well head power and information carrying means 2 and provided with the drilling rod 5 of power transfer function.Multi-form power is realized, is increased
The strong adaptability to changes for being used to control the equipment of wellbore pressure according to the present invention.Fluid is not only totally independent of, will not be taken
With share hydraulic pressure, can not also be influenceed by various underground emergency situations, because with independent energy supply system.
In one embodiment, the data message measured by measurement sensor 6 can also pass through ground information transmission equipment
11 are supplied to corresponding database by internet, for drilling engineering technical specialist and administrative staff's reference.In this manner it is possible to
More reliable foundation is provided for the selection of technique, and then reduces engineering risk, the intelligence degree of drilling well is improved, greatly optimizes
Casing programme, and provide steric requirements for operations such as follow-up completion, pilot productions.
In another available embodiment, measurement sensor 6 is in relaying pipe nipple and close proximity to corresponding pressure
Power influences element 7.Cancel terrestrial information processing mechanism 10 in this embodiment, be changed to by with measurement sensor 6 be in it is same in
Wellbore pressure is controlled to influence element 7 after the controller in pipe nipple.In this embodiment, the operation of whole equipment has been simplified
And floor space.
Fig. 2,3 and 4 respectively illustrate normal equipment when creeping into, occurring leakage and occur overflow for controlling wellbore pressure
The diagrammatic cross-section of 20 underground part.
As shown in Fig. 2 in normal drilling, pressure influence element 7 does not work, i.e., in stopped status.Because measurement is passed
Sensor 6 and pressure influence element 7 provide electric power, therefore they by ground by well head power and information carrying means 2 and drilling rod 5
Independently of mud recycle unit, even if pressure influence element 7, which does not work, nor affects on normal drilling.
As shown in figure 3, according to the metrical information of measurement sensor 6, when it is determined that leakage occurs for some position, being believed by ground
Cease processing mechanism 10（Controller）Element 7 is influenceed in the first direction according to down-hole information commanded pressure（It is illustrated as in Fig. 3 from pit shaft
Depression angle be observed counterclockwise）Rotate, annular space liquid column hydrostatic pressure is reduced with formation fracture pressure difference, so as to drop
Low leakage harm.
Or in alternative embodiment, the controller in the relaying pipe nipple where measurement sensor 6 controls neighbouring pressure
Power influence element 7 works automatically（It is rotated in a first direction, is illustrated as being observed side counterclockwise from the depression angle of pit shaft in Fig. 3
To）, annular space liquid column hydrostatic pressure is reduced with formation fracture pressure difference, so as to reduce leakage harm.
As shown in figure 4, according to the metrical information of measurement sensor 6, when it is determined that overflow occurs for some position, being believed by ground
Cease processing mechanism 10（Controller）Element 7 is influenceed in a second direction according to down-hole information commanded pressure（It is illustrated as in Fig. 4 from pit shaft
Depression angle be observed clockwise）Rotate, annular space liquid column hydrostatic pressure is increased with formation fracture pressure difference, so as to drop
Low overflow harm.
Or in alternative embodiment, the controller in the relaying pipe nipple where measurement sensor 6 controls neighbouring pressure
Power influence element 7 works automatically（It is rotated in a second direction, is illustrated as being observed side clockwise from the depression angle of pit shaft in Fig. 4
To）, annular space liquid column hydrostatic pressure is increased with formation fracture pressure difference, so as to reduce overflow harm.
The invention also provides a kind of method for controlling wellbore pressure：
Step a, sets the equipment 20 as described above that be used to control wellbore pressure according to the present invention.
Step b：Being pumped at least two from well head has the mud of different fluid density, and at least double gradients are obtained in drilling rod
Fluid.In the wellbore, the density of fluid can edge in the density on the fluid with least double gradients, different gradients
The longitudinal direction of pit shaft increasing or decreasing from top to bottom, can also change non-monotonicly；Mud can be pumped into following manner, i.e.,
So that in drill string in whole pit shaft pressure traverse for piecewise linearity or meet curved profile set in advance.
Step c：Monitor the state parameter of whole pit shaft in real time by measurement sensor 6.The parameter for example may include well
Flow, pressure, density and the temperature of fluid in cylinder.These parameters have effect for determining and regulating and controlling wellbore conditions.
Step d：The stratum that measurement sensor 6 is obtained and drilling parameter information pass through the brill with signal transfer functions
Bar 5, well head power and information carrying means 2 and power and signal transmssion line 3 pass to terrestrial information processing mechanism 10.Believe on ground
Cease above-mentioned parameter of the processing mechanism 10 according to measured by the measurement sensor 6 of diverse location, it may be determined that the situation of underground, for example
Overflow or the position of leakage and size that the borehole wall occurs.Terrestrial information processing mechanism 10 positioned at ground can be according to the real-time palm
The situation for the whole pit shaft held, assigns adjust instruction in time, and the pressure influence element 7 of control diverse location plays a role to adjust
Wellbore pressure.Specifically, for example, can be by making the edge of pressure influence element 7 in the case of pressure influence element 7 is turbine pump
The rotation of different directions, the pressure distribution of the annular space between adjustment drilling rod 5 and stratum 4 forms a wellbore pressure section
Control system, realizes underbalance, nearly balance or Overbalance Drilling operation.
For the specific regulation process of pressure influence element 7, when can work as wellbore parameters and being shown as normal drilling, pass through institute
Controller control pressure influence element 7 is stated to shut down；When the wellbore parameters detected by specific measurement sensor 6 are shown as occurring
During leakage, the pressure influence element 7 adjacent to specific measurement sensor 6 is controlled to be rotated in a first direction by controller, when
When pressure influence element 7 is rotated in a first direction, the difference in pit shaft between annular space liquid column hydrostatic pressure and formation fracture pressure subtracts
It is small；When the wellbore parameters detected by specific measurement sensor 6 be shown as occur overflow when, by controller control adjacent to
The pressure influence element 7 of specific measurement sensor 6 is rotated in a second direction, when pressure influence element 7 is rotated in a second direction,
When, the difference increase in pit shaft between annular space liquid column hydrostatic pressure and formation fracture pressure.
Preferably, controller judges to assign for side guider 8 after wellbore conditions according to the parameter from sensor 6
To instruction.Meanwhile, provide power to equipment 20 by well head power and information carrying means 2.
In a preferred embodiment, the occurring with a distance from location point from leakage or overflow according to pressure influence element 7
With the difference of the flow of annular flow in pit shaft 4, the rotating speed and rotation time of pressure influence element 7 are adjusted by controller,
To control the pressure of local well section, annular pressure is balanced as far as possible with strata pressure, reach the purpose for reducing accident harm.It is this
Local directed complete set be according to pressure influence element 7 in the wellbore the change of position and carry out automatically, if some pressure influence is first
Part 7 has passed over leakage or overflow position with the increase of well depth, then it can gradually reduce velocity of rotation to reduce its control range,
With generation location point of the pressure influence element 7 away from leakage or overflow, the rotation of element 7 is influenceed by controller control pressure
Speed, makes it be gradually decrease to zero, restarts to rotate again into some balance control pressure area until next time.Into leakage
Or the operation of pressure influence element 7 and leave contrast during overflow balance control pressure area.
Although by reference to preferred embodiment, invention has been described, is not departing from the situation of the scope of the present invention
Under, various improvement can be carried out to it and part therein can be replaced with equivalent.The invention is not limited in Wen Zhonggong
The specific embodiment opened, but all technical schemes including falling within the scope of the appended claims.
Claims (10)
1. a kind of method for controlling wellbore pressure, comprises the following steps：
Step a, sets a kind of equipment for controlling wellbore pressure, including at least one measurement sensor on drilling rod
With at least one pressure influence element, and for controlling the controller of the pressure influence element, the measurement sensor will
Detected wellbore parameters are sent to the controller, and the controller controls the pressure according to the wellbore parameters received
Influence element is shut down, is rotated in a first direction or rotated along opposite to that second direction；
Step b, being pumped at least two from well head has the mud of different fluid density, and the stream of at least double gradients is obtained in drilling rod
Body；
Step c, wellbore parameters are detected by the measurement sensor；
Step d, according to detected wellbore parameters, controls the pressure influence element to shut down, in the first direction by controller
Rotate or rotated along opposite to that second direction.
2. according to the method described in claim 1, it is characterised in that：
When wellbore parameters are shown as normal drilling, the pressure influence element is controlled to shut down by the controller；
When the wellbore parameters detected by specific measurement sensor are shown as occurring leakage, phase is controlled by the controller
It is rotated in a first direction adjacent to the pressure influence element of the specific measurement sensor；
When the wellbore parameters detected by specific measurement sensor are shown as occurring overflow, phase is controlled by the controller
It is rotated in a second direction, adjacent to the pressure influence element of the specific measurement sensor.
3. method according to claim 2, it is characterised in that when the pressure influence element is rotated in a first direction,
Difference between annular space liquid column hydrostatic pressure and formation fracture pressure reduces in pit shaft, when the pressure influence element in a second direction
During rotation, the difference increase in pit shaft between annular space liquid column hydrostatic pressure and formation fracture pressure.
4. according to the method described in claim 1, it is characterised in that according to the pressure influence element from leakage or the hair of overflow
The difference of the flow of annular flow in the distance and pit shaft of raw location point, the pressure influence member is adjusted by the controller
The rotating speed and rotation time of part.
5. according to the method described in claim 1, it is characterised in that as the pressure influence element is away from leakage or overflow
Generation location point, the velocity of rotation of the pressure influence element is controlled by the controller, it is gradually decrease to zero.
6. according to the method described in claim 1, it is characterised in that the wellbore parameters bag measured by the measurement sensor
Include flow, pressure, density and temperature.
7. fluid in the method according to any one of claim 1 to 6, it is characterised in that in stepb, different gradients
Density be from top to bottom monotonically changed.
8. the method according to any one of claim 1 to 6, it is characterised in that in stepb, is pumped into as follows
Mud, that is, cause pressure traverse in the drill string in whole pit shaft for piecewise linearity or meet curved profile set in advance.
9. the method according to any one of claim 1 to 6, it is characterised in that the equipment also includes being used to adjust boring
The guider in head direction, the controller judges to fill described be oriented to after wellbore conditions according to the parameter from the sensor
Put the instruction assigned for direction.
10. the method according to any one of claim 1 to 6, it is characterised in that the equipment also includes being used to introduce outer
The well head power and information carrying means of portion's electric power, provide dynamic by the well head power and information carrying means to the equipment
Power.
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| CN106401571A (en) * | 2016-09-12 | 2017-02-15 | 中国石油大学(华东) | Measurement unit and overflow information recognition device and method |
| CN111561296A (en) * | 2020-04-30 | 2020-08-21 | 中国石油天然气股份有限公司 | Underground switch device and method for controlling pressure in shaft |
| EP4211335A4 (en) * | 2020-09-11 | 2024-10-02 | Services Petroliers Schlumberger | Geologic formation characterization |
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