CN108518197A - The cementing well stage collar and control method controlled by downhole optic fiber - Google Patents
The cementing well stage collar and control method controlled by downhole optic fiber Download PDFInfo
- Publication number
- CN108518197A CN108518197A CN201810219351.XA CN201810219351A CN108518197A CN 108518197 A CN108518197 A CN 108518197A CN 201810219351 A CN201810219351 A CN 201810219351A CN 108518197 A CN108518197 A CN 108518197A
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- China
- Prior art keywords
- motor
- stage collar
- sleeve
- cementing
- fiber optic
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- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
Abstract
The present invention discloses a kind of cementing well stage collar controlled by downhole optic fiber and control method, a, cementing well stage collar is connected into pipe string, optical fiber connector is provided in cementing well stage collar, the optical fiber connector connects armored fiber optic, the armored fiber optic is pierced by by pipe sleeve annular space by well head, is connect with ground fiber optic modulator；B, by the pipe string tripping in drilling well for connecting completion in step a, when cementing well stage collar is located at job position, opening control signal is converted by ground fiber optic modulator by optical signal, and underground is sent by armored fiber optic；C, after optical fiber connector receives optical signal, cementing well stage collar is acted.Technical solution provided by the invention, which can be realized, to be switched on ground by fiber optic communication mode remote control cementing well stage collar.This method meets remote control, requirement easy to operate, without throwing rubber plug simultaneously.
Description
Technical field
The present invention relates to oilfield drilling technical field, it is specifically a kind of by downhole optic fiber control cementing well stage collar and
Control method.
Background technology
In fraclional well cementing operation process, the method for current general open and close sizing collar be put into underground open plug and
Shut-off plug.It when needing to open sizing collar, is put into underground and opens plug, opened plug and moved to underground with cementing fluid, and final seat
In on the unlatching step on sizing collar, building the pressure makes valve move downward, open sizing collar on duct, when need close sizing collar
When, shut-off plug is put into underground again, shut-off plug is moved with cementing fluid to underground, and final seat is in the closing step on sizing collar
On, build the pressure makes valve move downward again again, closes the duct on sizing collar；After the completion of waiting for cementing operation, in tripping in drill bit
Bore 2 rubber plugs and cement plug.Current operation needs to put into open and close rubber plug twice to underground, and not only work flow is cumbersome, and
And the later stage bores mill and needs to take a long time；Simultaneously because rubber plug during underground moves downward, can generate mill with casing wall
Damage, when causing to be present onto step, there is a problem of that rubber plug upper-lower seal is not tight, can influence fraclional well cementing effect in addition because
For rubber plug serious wear, cause to be turned on and off sizing collar failure, to generate significant impact to fraclional well cementing operation.
Invention content
Goal of the invention：The purpose of the present invention is for the deficiency in current technology, provide one kind and controlled by downhole optic fiber
Cementing well stage collar and control method, can realize ground remote control cementing well stage collar switch.This method meets remote simultaneously
Process control, requirement easy to operate, without throwing rubber plug.
Technical solution：To achieve the above object, the present invention provide a kind of cementing well stage collar controlled by downhole optic fiber and
Control method, control method are as follows：
A, cementing well stage collar is connected into pipe string, optical fiber connector, the optical fiber connector connection is provided in cementing well stage collar
Armored fiber optic, the armored fiber optic are pierced by by well head by pipe sleeve annular space, are connect with ground fiber optic modulator；
B, by the pipe string tripping in drilling well for connecting completion in step a, when cementing well stage collar is located at job position, pass through ground light
Opening control signal is converted into optical signal by fine modulator, and is sent into underground by armored fiber optic；
C, after optical fiber connector receives optical signal, cementing well stage collar is acted；
The cementing well stage collar includes top connection, motor housing body, motor inner housing, coupling sleeve, down-hole battery, sealing ring, electricity
Machine rotor, electric circuit in well plate, optical fiber connector, lower contact and sleeve, the top connection are connected to motor housing body upper end, motor
Outer housing is socketed on the outside of motor inner housing, and the sleeve connection and top connection upper end, motor inner housing upper end passes through upper
Coupler bore is socketed in sleeve；Motor housing body is provided at both ends with sealing ring with motor inner housing and constitutes confined space, motor
Rotor, down-hole battery, electric circuit in well plate and optical fiber connector are installed on wherein, and hole, armored fiber optic are provided on motor housing body
Through hole is connected to optical fiber connector, and armored fiber optic is sealed with hole connection gap；It is arranged between motor housing body and motor inner housing
There are the coupling sleeve of annular wound packages, the coupling sleeve to be fixedly connected with motor housing body, coupling sleeve is socketed on the outside of motor inner housing,
It is connected by threaded screw rod mode between coupling sleeve and motor inner housing, thread rotary orientation coordinates rotor rotation direction, rotor
When rotation, motor inner housing threadingly moves upwards；The lower contact is connected to motor housing body lower end, the lower contact setting
There is screw thread that can be connect with pipe sleeve；Accessibke porosity is provided on the sleeve, the motor inner housing is within sleeve inner sets up separately and is equipped with
Through-hole, the inner via hole upper and lower side are both provided with sealing ring group；Electric circuit in well plate is built-in with electric signal, and the optical fiber connector can
It receives and the optical signal come is transmitted by ground fiber optic modulator and passes to electric circuit in well plate progress opto-electronic conversion, signal processing and knowledge
Not, it if the signal of identification is mismatched with the electric signal built in electric circuit in well plate, is failure to actuate；If signal and the underground of identification
Electric signal matching built in circuit board then controls down-hole battery power supply, rotor rotation.
As a kind of improvement of this programme, accessibke porosity diameter is more than inner via hole diameter on motor inner housing on sleeve.
As a kind of improvement of this programme, the inner via hole upper and lower side sealing ring group includes at least two sealing rings.
As a kind of improvement of this programme, inner via hole is located under accessibke porosity when the motor inner housing is in lower limit position
At least there is a sealing ring in sealing ring group in square and centre, when motor inner housing is in upper limit position, inner via hole is located at outer
At least there is a sealing ring in sealing ring group in above through-hole and centre.
As a kind of improvement of this programme, sleeve upper end inner wall is provided with screw thread for connecting pipe box.
Advantageous effect：The cementing well stage collar disclosed in this invention controlled by downhole optic fiber and control method, work as needs
When opening cementing well stage collar, opening control signal is converted by ground fiber optic modulator by optical signal, and pass through armored fiber optic
It is sent into underground；Optical fiber connector can receive by ground fiber optic modulator transmit come optical signal and pass to electric circuit in well plate progress
Opto-electronic conversion, signal processing and identification, it is motionless if the signal of identification is mismatched with the electric signal built in electric circuit in well plate
Make；If the signal of identification is matched with the electric signal built in electric circuit in well plate, down-hole battery power supply is controlled, down-hole battery starts
Power supply makes rotor rotate.When needing to close cementing well stage collar, equally generated at well head by ground pump truck on ground
The pressure change of another group of regularity, control cementing well stage collar are closed.
During practice of construction, cementing well stage collar is to be closed after with casing G.I.H, at this time motor
Inner housing is in lower limit position, accessibke porosity and inner via hole and is insulated by sealing ring group.When need carry out cementing well stage collar unlatching
When operation, opening control signal is converted by ground fiber optic modulator by optical signal on ground, and be sent by armored fiber optic
Underground, after the optical fiber connector built in cementing well stage collar receives correct optical signal, down-hole battery, which starts power supply, makes motor turn
Son rotation drives coupling sleeve rotation, coupling sleeve that motor inner housing is driven to move upwards certain distance under the cooperation of threaded screw rod,
Accessibke porosity is set to be connected to inner via hole, cementing well stage collar is opened.When need carry out cementing well stage collar close operation when, ground again
Opening control signal is converted into optical signal by ground fiber optic modulator, and underground, well cementation classification are sent by armored fiber optic
After the built-in optical fiber connector of hoop receives correct optical signal, the control down-hole battery power supply of electric circuit in well plate makes rotor revolve
Turn, drive coupling sleeve rotation, coupling sleeve that motor inner housing is driven to continue up certain distance under the cooperation of threaded screw rod,
Accessibke porosity and inner via hole are staggered and are insulated by sealing ring group, and cementing well stage collar is closed.
The cementing well stage collar disclosed in this invention controlled by downhole optic fiber and control method, can realize remote on ground
Process control underground cementing well stage collar can realize that remote control cementing well stage collar switchs by way of fiber optic communication on ground.
This method meets remote control, requirement easy to operate, without throwing rubber plug simultaneously, can effectively avoid of the existing technology various
Underground problem.
Description of the drawings
Fig. 1, cementing well stage collar structural schematic diagram；
Fig. 2, cementing well stage collar downhole pipeline structural schematic diagram；
Fig. 3, cementing well stage collar control principle drawing；
Fig. 4, cementing well stage collar open state figure；
Fig. 5, cementing well stage collar closed 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, optical fiber connector；11, lower contact；12, sleeve；13、
Accessibke porosity；14, inner via hole；15, sealing ring group；16, casing；17, ground fiber optic modulator；18, well head；19, armored fiber optic；
20, upper layer casing；21, cementing well stage collar.
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 cementing well stage collar 21 controlled by downhole optic fiber and its pipe string connection type as depicted in figs. 1 and 2.Gu
Well sizing collar 21 includes top connection 1, motor housing body 3, motor inner housing 4, coupling sleeve 5, down-hole battery 6, rotor 8, well
Lower circuit board 9, optical fiber connector 10, lower contact 11 and sleeve 12, top connection 1 are connected to 3 upper end of motor housing body, motor housing
Body 3 is socketed in 4 outside of motor inner housing, and the connection of sleeve 12 and 1 upper end of top connection, 4 upper end of motor inner housing pass through in top connection 1
Hole is socketed in sleeve 12, and 12 upper end inner wall of sleeve is provided with screw thread for connecting pipe box；Motor housing body 3 and motor inner housing
4 both ends are respectively arranged with sealing ring 2 and lower seal 7 constitutes confined space, rotor 8, down-hole battery 6, electric circuit in well
Plate 9 and optical fiber connector 10 are installed on wherein, and hole is provided on motor housing body 3, and 19 through hole of armored fiber optic is connected to optical fiber and connects
Device 10 is connect, armored fiber optic 19 is sealed with hole connection gap；Annular wound packages is provided between motor housing body 3 and motor inner housing 4
Coupling sleeve 5, coupling sleeve 5 is fixedly connected with motor housing body 3, and coupling sleeve 5 is socketed in 4 outside of motor inner housing, coupling sleeve 5 with
It is connected by threaded screw rod mode between motor inner housing 4, thread rotary orientation coordinates 8 rotation direction of rotor, rotor 8 to rotate
When, motor inner housing 4 threadingly moves upwards；Lower contact 11 is connected to 3 lower end of motor housing body, and lower contact 11 is provided with screw thread
It can be connect with pipe sleeve；Accessibke porosity 13 is provided on sleeve 12, motor inner housing 4 is provided with inner via hole 14 in 12 inside points of sleeve,
13 diameter of accessibke porosity is more than 14 diameter of inner via hole on motor inner housing 4 on sleeve 12.14 upper and lower side of inner via hole is both provided with sealing
Circle group 15,14 upper and lower side sealing ring group 15 of inner via hole include two sealing rings.Motor inner housing 4 is in interior when lower limit position
Through-hole 14 is located at 13 lower section of accessibke porosity and sealing ring group 15 is between inner via hole 14 and accessibke porosity 13, and motor inner housing 4 is in
When upper limit position, inner via hole 14 is located at 13 top of accessibke porosity and sealing ring group 15 is between inner via hole 14 and accessibke porosity 13.
Electric circuit in well plate 9 is built-in with electric signal, and the optical fiber connector 10 can receive transmits the light come letter by ground fiber optic modulator 17
Number and pass to electric circuit in well plate 9 and carry out opto-electronic conversion, signal processing and identification, if the signal of identification and electric circuit in well plate 9
Built-in electric signal mismatches, then is failure to actuate；If the signal of identification is matched with the electric signal built in electric circuit in well plate 9, control
Down-hole battery 6 processed is powered, and rotor 8 rotates.21 switching device of cementing well stage collar is threadedly coupled by sleeve 12 with casing 16,
It is connect with casing 16 by lower contact 11.
Fig. 3 show 21 control principle drawing of cementing well stage collar controlled by downhole optic fiber.
The control method of cementing well stage collar 21 is as follows：
A, cementing well stage collar 21 is connected into pipe string, optical fiber connector 10, the optical fiber connection is provided in cementing well stage collar 21
Device 10 connects armored fiber optic 19, and the armored fiber optic 19 is pierced by by pipe sleeve annular space by well head 18, with ground fiber optic modulator 17
Connection, armored fiber optic 19 are attached debugging on ground with cementing well stage collar 21 by optical fiber connector 10；
B, by the pipe string tripping in drilling well for connecting completion in step a, armored fiber optic 19 be located at casing 16 and upper layer casing 2016 it
Between annular space in, when cementing well stage collar 21 is located at job position, by ground fiber optic modulator 17 opening control signal turn
Optical signal is turned to, and underground is sent by armored fiber optic 19；
C, after optical fiber connector 10 receives optical signal, cementing well stage collar 21 is acted：
During practice of construction, cementing well stage collar 21 is to be closed after with 16 G.I.H of casing, such as Fig. 1 institutes
Show, motor inner housing 4 is in lower limit position, accessibke porosity 13 and inner via hole 14 and is insulated by sealing ring group 15 at this time.On ground
Opening control signal is converted into optical signal by ground fiber optic modulator 17, and underground, well cementation are sent by armored fiber optic 19
After optical fiber connector 10 built in sizing collar 21 receives correct optical signal, down-hole battery 6, which starts power supply, makes rotor 8 revolve
Turning, coupling sleeve 5 is driven to rotate, coupling sleeve 5 drives motor inner housing 4 to move upwards certain distance under the cooperation of threaded screw rod,
Accessibke porosity 13 is set to be connected to inner via hole 14, cementing well stage collar 21 is opened, as shown in Figure 4.It is closed when needing progress cementing well stage collar 21
When closing operation, opening control signal is converted into optical signal again by ground fiber optic modulator 17 on ground, and pass through armouring
Optical fiber 19 is sent into underground, after the optical fiber connector 10 built in cementing well stage collar 21 receives correct optical signal, electric circuit in well plate 9
The control power supply of down-hole battery 6 makes rotor 8 rotate, and drives coupling sleeve 5 to rotate, coupling sleeve 5 drives motor inner housing 4 in screw thread
Certain distance is continued up under the cooperation of lead screw, accessibke porosity 13 and inner via hole 14 are staggered and are insulated by sealing ring group 15,
Cementing well stage collar 21 is closed, as shown in Figure 5.
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 (5)
1. a kind of cementing well stage collar controlled by downhole optic fiber and control method, which is characterized in that control method is as follows：
A, cementing well stage collar (21) is connected into pipe string, optical fiber connector (10), the light is provided in cementing well stage collar (21)
Fiber connector (10) connects armored fiber optic (19), and the armored fiber optic (19) is pierced by by pipe sleeve annular space by well head (18), with ground
Face fiber optic modulator (17) connects；
B, by the pipe string tripping in drilling well for connecting completion in step a, when cementing well stage collar (21) is located at job position, pass through ground
Opening control signal is converted into optical signal by face fiber optic modulator (17), and is sent into underground by armored fiber optic (19)；
C, after optical fiber connector (10) receives optical signal, cementing well stage collar (21) is acted；
The cementing well stage collar (21) includes top connection (1), motor housing body (3), motor inner housing (4), coupling sleeve (5), well
Lower battery (6), sealing ring, rotor (8), electric circuit in well plate (9), optical fiber connector (10), lower contact (11) and sleeve
(12), the top connection (1) is connected to motor housing body (3) upper end, and motor housing body (3) is socketed in motor inner housing (4) outside
Side, sleeve (12) connection and top connection (1) upper end, motor inner housing (4) upper end is socketed across top connection (1) endoporus
In sleeve (12)；Motor housing body (3) is provided at both ends with sealing ring with motor inner housing (4) and constitutes confined space, and motor turns
Sub (8), down-hole battery (6), electric circuit in well plate (9) and optical fiber connector (10) are installed on wherein, and motor housing body is arranged on (3)
There are hole, armored fiber optic (19) through hole to be connected to optical fiber connector (10), armored fiber optic (19) is sealed with hole connection gap；Outside motor
The coupling sleeve (5) of annular wound packages, the coupling sleeve (5) and motor housing body are provided between shell (3) and motor inner housing (4)
(3) it is fixedly connected, coupling sleeve (5) is socketed on the outside of motor inner housing (4), is passed through between coupling sleeve (5) and motor inner housing (4)
Threaded screw rod mode connects, and thread rotary orientation coordinates rotor (8) rotation direction, when rotor (8) rotates, motor inner housing (4)
Threadingly move upwards；The lower contact (11) is connected to motor housing body (3) lower end, and the lower contact (11) is provided with screw thread
It can be connect with pipe sleeve；Accessibke porosity (13) is provided on the sleeve (12), the motor inner housing (4) is in sleeve (12) inside points
It is provided with inner via hole (14), inner via hole (14) upper and lower side is both provided with sealing ring group (15)；Electric circuit in well plate (9) is built-in with
Electric signal, the optical fiber connector (10) can receive by ground fiber optic modulator (17) transmit Lai optical signal and pass to underground
Circuit board (9) carries out opto-electronic conversion, signal processing and identification, if the signal of identification and the telecommunications built in electric circuit in well plate (9)
Number mismatch, then be failure to actuate；If the signal of identification is matched with the electric signal built in electric circuit in well plate (9), underground electricity is controlled
Pond (6) powers, rotor (8) rotation.
2. a kind of cementing well stage collar controlled by downhole optic fiber as described in claim 1 and control method, it is characterised in that：
Accessibke porosity (13) diameter is more than inner via hole (14) diameter on motor inner housing (4) on the sleeve (12).
3. a kind of cementing well stage collar controlled by downhole optic fiber as claimed in claim 2 and control method, it is characterised in that：
Inner via hole (14) the upper and lower side sealing ring group (15) includes at least two sealing rings.
4. a kind of cementing well stage collar controlled by downhole optic fiber as claimed in claim 3 and control method, it is characterised in that:
When the motor inner housing (4) is in lower limit position inner via hole (14) be located at below accessibke porosity (13) and it is intermediate at least exist it is close
A sealing ring in seal group (15), when motor inner housing (4) is in upper limit position, inner via hole (14) is located at accessibke porosity (13)
Top and intermediate at least there is a sealing ring in sealing ring group (15).
5. a kind of cementing well stage collar controlled by downhole optic fiber as claimed in claim 4 and control method, it is characterised in that：
Sleeve (12) upper end inner wall is provided with screw thread for connecting pipe box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810219351.XA CN108518197A (en) | 2018-03-16 | 2018-03-16 | The cementing well stage collar and control method controlled by downhole optic fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810219351.XA CN108518197A (en) | 2018-03-16 | 2018-03-16 | The cementing well stage collar and control method controlled by downhole optic fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108518197A true CN108518197A (en) | 2018-09-11 |
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ID=63432844
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810219351.XA Pending CN108518197A (en) | 2018-03-16 | 2018-03-16 | The cementing well stage collar and control method controlled by downhole optic fiber |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5389003A (en) * | 1993-09-13 | 1995-02-14 | Scientific Drilling International | Wireline wet connection |
| CN104088603A (en) * | 2014-06-18 | 2014-10-08 | 中国石油集团川庆钻探工程有限公司 | Method for controlling underground sliding sleeves by ground pressure waves |
| CN206376822U (en) * | 2016-12-13 | 2017-08-04 | 中国石油天然气股份有限公司 | A kind of well cementation sliding sleeve |
| 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 |
| CN107288602A (en) * | 2017-05-31 | 2017-10-24 | 中国石油天然气股份有限公司 | A kind of automatically controlled toe-end fracturing sliding bush |
| CN207017986U (en) * | 2017-04-26 | 2018-02-16 | 无锡博泰微流体技术有限公司 | A kind of novel intelligent well cementation sliding sleeve |
-
2018
- 2018-03-16 CN CN201810219351.XA patent/CN108518197A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5389003A (en) * | 1993-09-13 | 1995-02-14 | Scientific Drilling International | Wireline wet connection |
| CN104088603A (en) * | 2014-06-18 | 2014-10-08 | 中国石油集团川庆钻探工程有限公司 | Method for controlling underground sliding sleeves by ground pressure waves |
| CN206376822U (en) * | 2016-12-13 | 2017-08-04 | 中国石油天然气股份有限公司 | A kind of well cementation sliding sleeve |
| CN207017986U (en) * | 2017-04-26 | 2018-02-16 | 无锡博泰微流体技术有限公司 | A kind of novel intelligent well cementation sliding sleeve |
| 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 |
| CN107288602A (en) * | 2017-05-31 | 2017-10-24 | 中国石油天然气股份有限公司 | A kind of automatically controlled toe-end fracturing sliding bush |
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Application publication date: 20180911 |