CN108468531A - Pass through the underground back-pressure valve and control method of drilling rod speed Control - Google Patents
Pass through the underground back-pressure valve and control method of drilling rod speed Control Download PDFInfo
- Publication number
- CN108468531A CN108468531A CN201810219355.8A CN201810219355A CN108468531A CN 108468531 A CN108468531 A CN 108468531A CN 201810219355 A CN201810219355 A CN 201810219355A CN 108468531 A CN108468531 A CN 108468531A
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- China
- Prior art keywords
- pressure valve
- underground
- inner housing
- underground back
- control method
- 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.)
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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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/12—Valve arrangements for boreholes or wells in wells operated by movement of casings or tubings
Abstract
The present invention discloses a kind of underground back-pressure valve and control method by drilling rod speed Control, and control method is as follows：A, underground back-pressure valve upper and lower side connecting sleeve is connected into pipe string；B, by the pipe string lower going-into-well for connecting completion in step a, when needing to control underground back-pressure valve, the put-on and delegated operation that downhole pipeline carries out certain rule is operated on derrick；C, underground back-pressure valve carries out switch motion.Underground back-pressure valve and control method disclosed in this invention by drilling rod speed Control, it can realize and convey control instruction to underground back-pressure valve by way of put-on and delegated tubing string on ground, to realize remote control underground back-pressure valve, this method meets remote control, easy to operate, the reliable requirement of switch simultaneously, it is perishable to can effectively avoid prior art spring, it blocks, the not high problem of reliability.
Description
Technical field
The present invention relates to oilfield drilling technical field, specifically a kind of underground back-pressure valve by drilling rod speed Control and
Control method.
Background technology
In lower tubular column and underground construction operation process, when encountering underground abnormal high pressure hydrocarbon formations, if shaft bottom is pressed
Power is less than strata pressure, will cause the down hole problems such as overflow even blowout；At this time in order to avoid such underground complexity feelings
Condition occurs, and usually installs back-pressure valve in down-hole string lower end, formation fluid is prevented to be upwardly into tubing string.Underground is general at present
Back-pressure valve uses float-ball type, is opened and closed automatically by the resilient support sphere realization of spring.This back-pressure valve makes in underground
Problem with middle maximum is exactly that reliability is not high, because spring itself easily gets rusty, influence elastic property itself, while subsurface environment
Middle impurity is more, is easy to accumulate near spring, influences the flexible of spring, these hidden danger will have a direct impact on the use effect of back-pressure valve
Fruit further influences the safety of lower tubular column and underground construction operation process.
Invention content
Goal of the invention：The purpose of the present invention is for the deficiency in current technology, provide one kind by drilling rod speed Control
Underground back-pressure valve and control method, this method meet remote control, requirement easy to operate simultaneously.
Technical solution：To achieve the above object, the present invention provide a kind of underground back-pressure valve by drilling rod speed Control and
Control method, control method are as follows：
A, underground back-pressure valve upper and lower side connecting sleeve is connected into pipe string；
B, by the pipe string lower going-into-well for connecting completion in step a, when needing to control underground back-pressure valve, underground is operated on derrick
Pipe string carries out the put-on and delegated operation of certain rule；
C, underground back-pressure valve carries out switch motion；
The underground back-pressure valve includes top connection, sealing ring, motor housing body, motor inner housing, coupling sleeve, down-hole battery, electricity
Machine rotor, electric circuit in well plate, underground acceleration transducer, lower contact, outer sleeve, ball seat and batching sphere, top connection and outer sleeve
It is threadedly coupled；Motor inner housing is socketed in motor housing body, passes through the close of both ends between motor inner housing and motor housing body
Seal constitutes confined space, and down-hole battery, electric circuit in well plate and underground acceleration transducer are installed on wherein；Coupling sleeve and motor
Inner housing is connected by threaded screw rod mode, and rotor is threaded with coupling sleeve, when rotor rotates, connection
Set can rotate together with rotor, and motor inner housing can be upward along rotor axis direction under the cooperation of threaded screw rod
Movement；Ball seat is located inside outer sleeve, and for a circle annular protrusion, batching sphere is integrated with motor inner housing, and batching sphere is connected to
Motor inner housing upper end, between ball seat and motor inner housing, motor inner housing upper end extends into outer across top connection endoporus
In sleeve, motor inner housing even tube wall is provided at least two recirculation holes, and recirculation hole runs through motor inner housing tube wall.
As a kind of improvement of this programme, it is built-in with instruction morphing program in the electric circuit in well plate, sets downward add
Speed is positive value, and upward acceleration is negative value, while eliminating the influence of acceleration of gravity, only consider a downhole pipeline above carry,
The acceleration that lowering operation generates；In unit interval, the underground acceleration transducer built in the back-pressure valve of underground monitors downhole tubular
The downward acceleration that string decentralization generates is more than threshold value, is set as " 1 "；When downhole pipeline above carries or is static, in the unit interval, monitoring
The downward acceleration generated to downhole pipeline can be less than threshold value, be set as " 0 ".
As a kind of improvement of this programme, in step b, operated on derrick downhole pipeline carry out above the carrying of certain rule,
After lowering operation, the underground acceleration transducer in step c built in the back-pressure valve of underground receives after pipe serially adds velocity variations situation,
Electric circuit in well plate is given received signal and carries out signal processing and identification, extracts the binary system being made of digital " 1 " and " 0 "
Digital signal, if the signal of identification is mismatched with the instruction built in electric circuit in well plate, underground back-pressure valve is failure to actuate；If identification
Signal and electric circuit in well plate built in instructions match, then electric circuit in well plate control down-hole battery power supply, rotor rotation.
As a kind of improvement of this programme, the ball seat diameter of bore is less than isolation bulb diameter, ball seat endoporus and batching sphere
Contact portion is handled by rounding.
As a kind of improvement of this programme, the isolation ball surface is handled by frosted.
As a kind of improvement of this programme, there is necking, the recirculation hole to be uniformly arranged on for motor inner housing upper end
On necking outer wall.
As a kind of improvement of this programme, the circulation hole number is 4.
Advantageous effect：Underground back-pressure valve and control method disclosed in this invention by drilling rod speed Control, using adding
Velocity sensor detects the movement of drilling rod, sets downward acceleration as positive value, upward acceleration is negative value, is eliminated simultaneously
The influence of acceleration of gravity only considers the acceleration that downhole pipeline put-on and delegated operation generates；Keep downhole pipeline quiet first
Only, certain distance is then quickly transferred, since downhole pipeline is an accelerator from stationary state to moving downward, it is ensured that under
The speed for putting downhole pipeline is sufficiently fast, and downhole pipeline just will produce a larger downward acceleration, meanwhile, it contacts with downhole tubular
The underground back-pressure valve connect also will produce an identical acceleration.A downward acceleration threshold value is set in advance, in the unit interval,
Underground acceleration transducer built in the back-pressure valve of underground monitors that the downward acceleration that downhole pipeline decentralization generates is more than threshold value, if
For " 1 "；When downhole pipeline above carries or is static, in the unit interval, monitor that the downward acceleration that downhole pipeline generates can be less than
Threshold value is 0 or negative value, is set as " 0 ", in this way, the put-on and delegated operation that downhole pipeline carries out certain rule is operated on derrick, this
Sample can transmit one group of regular binary system code control signal to underground back-pressure valve.
During practice of construction, underground back-pressure valve is to be in open state when going into the well, when needing back pressure under closed-in well
When valve, the put-on and delegated operation that downhole pipeline carries out certain rule is operated on derrick, the underground built in the back-pressure valve of underground accelerates
After degree sensor and electric circuit in well plate receive correct closing control order, electric circuit in well plate control underground direct current motor starts
Work, rotor rotation drive coupling sleeve rotation, coupling sleeve that motor inner housing is driven to be transported upwards under the cooperation of threaded screw rod
Dynamic certain distance, isolation ball seat is on ball seat.When needing to be again turned on underground back-pressure valve, again by operating well on derrick
Down tube string carries out the put-on and delegated operation of another group of certain rule, the underground acceleration transducer built in the back-pressure valve of underground and well
After lower board receiver to correct unlatching control command, electric circuit in well plate control down-hole battery starts to power, and rotor is anti-
To rotation, coupling sleeve is driven to reversely rotate, coupling sleeve drives motor inner housing to be moved downward under the cooperation of threaded screw rod centainly
Distance, batching sphere are detached with ball seat, and internal pipeline is made to restore unobstructed.
Underground back-pressure valve and control method disclosed in this invention by drilling rod speed Control can be realized logical on ground
The mode for crossing put-on and delegated tubing string conveys control instruction to underground back-pressure valve, to realize remote control underground back-pressure valve, the party
Method meets that remote control, easy to operate, switch is reliable requires simultaneously, and it is perishable to can effectively avoid prior art spring, blocks,
The not high problem of reliability.
Description of the drawings
Fig. 1, underground back-pressure valve structural schematic diagram；
Fig. 2, underground back-pressure valve downhole pipeline structural schematic diagram；
Fig. 3, underground back-pressure valve control principle drawing；
Fig. 4, underground back pressure valve closing state figure；
Reference numerals list：1, top connection；2, upper sealing ring；3, motor housing body；4, motor inner housing；5, coupling sleeve；6, well
Lower battery；7, lower seal；8, rotor；9, electric circuit in well plate；10, underground acceleration transducer；11, lower contact；12, outer
Sleeve；13, ball seat；14, batching sphere；15, recirculation hole；16, casing；17, ground sound wave vibrator；18, well head；19, downhole tubular
String；20, underground back-pressure valve.
Specific implementation mode
With reference to the accompanying drawings and detailed description, the present invention is furture elucidated, it should be understood that following specific implementation modes are only
For illustrating the present invention rather than limiting the scope of the invention.It should be noted that word " preceding " used in the following description,
" rear ", "left", "right", "up" and "down" refer to that the direction in attached drawing, word "inner" and "outside" refer respectively to direction or remote
Direction from geometric center of specific component.
It is a kind of underground back-pressure valve 20 and its pipe string connection type as depicted in figs. 1 and 2.Underground back-pressure valve 20 includes above connecing
First 1, sealing ring, motor housing body 3, motor inner housing 4, coupling sleeve 5, down-hole battery 6, rotor 8, electric circuit in well plate 9, well
Lower acceleration transducer 10, lower contact 11, outer sleeve 12, ball seat 13 and batching sphere 14, top connection 1 connect with 12 screw thread of outer sleeve
It connects；Motor inner housing 4 is socketed in motor housing body 3, and motor inner housing 4 is respectively arranged with upper close with 3 both ends of motor housing body
Seal 2 and lower seal 7 constitute confined space, and down-hole battery 6, electric circuit in well plate 9 and underground acceleration transducer 10 are installed on
Wherein；Coupling sleeve 5 is connect with motor inner housing 4 by threaded screw rod mode, and rotor 8 is threaded with coupling sleeve 5,
When rotor 8 rotates, coupling sleeve 5 can together be rotated with rotor 8, and motor inner housing 4 can be in the cooperation of threaded screw rod
Under, it is moved upwards along 8 axis direction of rotor；Ball seat 13 is located inside outer sleeve 12, for a circle annular protrusion, batching sphere 14
Be integrated with motor inner housing 4, batching sphere 14 is connected to 4 upper end of motor inner housing, be located at ball seat 13 and motor inner housing 4 it
Between, 13 diameter of bore of ball seat is less than 14 diameter of batching sphere, and 13 endoporus of ball seat is handled with 14 contact portion of batching sphere by rounding.Every
It is handled by frosted from 14 surface of ball.4 upper end of motor inner housing is extended into across 1 endoporus of top connection in outer sleeve 12, in motor
4 upper end of shell has necking, is uniformly arranged on necking outer wall there are four recirculation hole 15, recirculation hole 15 runs through motor inner housing
4 tube walls.
Fig. 3 show 20 control principle drawing of underground back-pressure valve.
The control method of underground back-pressure valve 20 is as follows：
A, back-pressure valve 20 upper and lower side connecting sleeve 16 in underground is connected into pipe string；
B, by the pipe string lower going-into-well for connecting completion in step a, when needing to control underground back-pressure valve 20, well is operated on derrick
Down tube string 19 carries out the put-on and delegated operation of certain rule；
C, underground back-pressure valve 20 carries out switch motion.
The action that underground back-pressure valve 20 specifically executes in step c is as follows：
Underground back-pressure valve 20 is to be operated on derrick when needing back-pressure valve 20 under closed-in well in open state when going into the well
Downhole pipeline 19 carries out the put-on and delegated operation of certain rule, underground acceleration transducer 10 built in underground back-pressure valve 20 and
After electric circuit in well plate 9 receives correct closing control order, electric circuit in well plate 9 controls underground direct current motor and starts to work, electricity
Machine rotor 8 rotates, and coupling sleeve 5 is driven to rotate, and coupling sleeve 5 drives motor inner housing 4 to be moved upwards under the cooperation of threaded screw rod
Certain distance, batching sphere 14 are seated on ball seat 13, block pipe band, as shown in Figure 4.When needing to be again turned on underground back-pressure valve 20
When, it is operated again by the put-on and delegated for operating downhole pipeline 19 on derrick and carrying out another group of certain rule, underground back-pressure valve
After underground acceleration transducer 10 and electric circuit in well plate 9 built in 20 receive correctly unlatching control command, electric circuit in well plate 9
Control down-hole battery 6 starts to power, and rotor 8 reversely rotates, and coupling sleeve 5 is driven to reversely rotate, and coupling sleeve 5 drives in motor
Shell 4 moves downward certain distance under the cooperation of threaded screw rod, and batching sphere 14 is detached with ball seat 13, and internal pipeline is made to restore logical
Freely, as shown in Figure 1.
The technical means disclosed in the embodiments of the present invention is not limited only to the technological means disclosed in the above embodiment, further includes
By the above technical characteristic arbitrarily the formed technical solution of combination.
Claims (7)
1. a kind of underground back-pressure valve and control method by drilling rod speed Control, which is characterized in that control method is as follows：
A, by underground back-pressure valve (20) upper and lower side connecting sleeve（16）It is connected into pipe string；
B, it by the pipe string lower going-into-well for connecting completion in step a, when needing to control underground back-pressure valve (20), is operated on derrick
Downhole pipeline (19) carries out the put-on and delegated operation of certain rule；
C, underground back-pressure valve (20) carries out switch motion；
The underground back-pressure valve (20) includes top connection (1), sealing ring, motor housing body (3), motor inner housing (4), coupling sleeve
(5), down-hole battery (6), rotor (8), electric circuit in well plate (9), underground acceleration transducer (10), lower contact (11), outer
Sleeve (12), ball seat (13) and batching sphere (14), top connection (1) are threadedly coupled with outer sleeve (12)；Motor inner housing (4) is socketed
In motor housing body (3), confined air is constituted by the sealing ring at both ends between motor inner housing (4) and motor housing body (3)
Between, down-hole battery (6), electric circuit in well plate (9) and underground acceleration transducer (10) are installed on wherein；Coupling sleeve (5) and motor
Inner housing (4) is connected by threaded screw rod mode, and rotor (8) is threaded with coupling sleeve (5), works as rotor
(8) rotate when, coupling sleeve (5) can together be rotated with rotor (8), motor inner housing (4) can under the cooperation of threaded screw rod,
Along rotor (8), axis direction moves upwards；Ball seat (13) is located at outer sleeve (12) inside, for a circle annular protrusion, isolation
Ball (14) is integrated with motor inner housing (4), and batching sphere (14) is connected to motor inner housing (4) upper end, be located at ball seat (13) and
Between motor inner housing (4), motor inner housing (4) upper end is extended into across top connection (1) endoporus in outer sleeve (12), in motor
Shell (4) even tube wall is provided at least two recirculation holes (15), and recirculation hole (15) runs through motor inner housing (4) tube wall.
2. a kind of underground back-pressure valve and control method by drilling rod speed Control as described in claim 1, it is characterised in that：
It is built-in with instruction morphing program in the electric circuit in well plate (9), sets downward acceleration as positive value, upward acceleration is negative
Value, while the influence of acceleration of gravity is eliminated, only consider the acceleration that downhole pipeline (19) put-on and delegated operation generates；It is single
In the time of position, the underground acceleration transducer (10) built in underground back-pressure valve (20) monitors what downhole pipeline (19) decentralization generated
Downward acceleration is more than threshold value, is set as " 1 "；When downhole pipeline (19) above carries or is static, in the unit interval, downhole tubular is monitored
The downward acceleration that (19) generate of going here and there can be less than threshold value, be set as " 0 ".
3. a kind of underground back-pressure valve and control method by drilling rod speed Control as claimed in claim 2, which is characterized in that
In step b, after the put-on and delegated operation that downhole pipeline (19) carries out certain rule is operated on derrick, underground back pressure in step c
Underground acceleration transducer (10) built in valve (20) receives after pipe serially adds velocity variations situation, and well is given received signal
Lower circuit board (9) carries out signal processing and identification, extracts the binary digital signal being made of digital " 1 " and " 0 ", if known
Other signal is mismatched with the instruction built in electric circuit in well plate (9), and underground back-pressure valve (20) is failure to actuate；If identification signal with
Instructions match built in electric circuit in well plate (9), then electric circuit in well plate (9) control down-hole battery (6) power supply, rotor (8) turn
It is dynamic.
4. a kind of underground back-pressure valve and control method by drilling rod speed Control as claimed in claim 3, it is characterised in that：
Ball seat (13) diameter of bore is less than batching sphere (14) diameter, and ball seat (13) endoporus is with batching sphere (14) contact portion by falling
Circle processing.
5. a kind of underground back-pressure valve and control method by drilling rod speed Control as claimed in claim 4, it is characterised in that:
Batching sphere (14) surface is handled by frosted.
6. a kind of underground back-pressure valve and control method by drilling rod speed Control as claimed in claim 5, it is characterised in that：
There is necking, the recirculation hole (15) to be uniformly arranged on necking outer wall for motor inner housing (4) upper end.
7. a kind of underground back-pressure valve and control method by drilling rod speed Control as claimed in claim 6, it is characterised in that：
Recirculation hole (15) quantity is 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810219355.8A CN108468531A (en) | 2018-03-16 | 2018-03-16 | Pass through the underground back-pressure valve and control method of drilling rod speed Control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810219355.8A CN108468531A (en) | 2018-03-16 | 2018-03-16 | Pass through the underground back-pressure valve and control method of drilling rod speed Control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108468531A true CN108468531A (en) | 2018-08-31 |
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ID=63265449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810219355.8A Pending CN108468531A (en) | 2018-03-16 | 2018-03-16 | Pass through the underground back-pressure valve and control method of drilling rod speed Control |
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| CN (1) | CN108468531A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023137795A1 (en) * | 2022-01-20 | 2023-07-27 | 谭艳儒 | Ground-to-downhole communication method and system |
| RU2806555C1 (en) * | 2022-12-12 | 2023-11-01 | Общество с ограниченной ответственностью "Научно-производственное предприятие АВТОМАТИКИ и МЕТРОЛОГИИ" | Check valve |
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| CN107227948A (en) * | 2017-05-19 | 2017-10-03 | 中国石油集团川庆钻探工程有限公司 | The method that ground controls downhole orientation hydrajet tool |
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|---|---|---|---|---|
| US6267185B1 (en) * | 1999-08-03 | 2001-07-31 | Schlumberger Technology Corporation | Apparatus and method for communication with downhole equipment using drill string rotation and gyroscopic sensors |
| CN2453119Y (en) * | 2000-08-24 | 2001-10-10 | 胜利石油管理局渤海钻井总公司 | Oil well tail pipe holding means of mechanical slips locus type |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023137795A1 (en) * | 2022-01-20 | 2023-07-27 | 谭艳儒 | Ground-to-downhole communication method and system |
| RU2806555C1 (en) * | 2022-12-12 | 2023-11-01 | Общество с ограниченной ответственностью "Научно-производственное предприятие АВТОМАТИКИ и МЕТРОЛОГИИ" | Check valve |
| RU2810782C1 (en) * | 2023-10-16 | 2023-12-28 | Общество С Ограниченной Ответственностью "Марс" | Check valve |
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Application publication date: 20180831 |