CN105927179B - One kind suppressing expansion type downhole annular blowout preventer and its means of communication - Google Patents

One kind suppressing expansion type downhole annular blowout preventer and its means of communication Download PDF

Info

Publication number
CN105927179B
CN105927179B CN201610294584.7A CN201610294584A CN105927179B CN 105927179 B CN105927179 B CN 105927179B CN 201610294584 A CN201610294584 A CN 201610294584A CN 105927179 B CN105927179 B CN 105927179B
Authority
CN
China
Prior art keywords
sliding block
blowout preventer
expansion type
suppressing
annular blowout
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.)
Active
Application number
CN201610294584.7A
Other languages
Chinese (zh)
Other versions
CN105927179A (en
Inventor
黎伟
夏杨
宋伟
雷鸿翔
袁胜桐
孙切
宁点
杨博
杨牧
宋金丽
周妍竹
罗献科
李果林
陈检
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Southwest Petroleum University
Original Assignee
Southwest Petroleum University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Southwest Petroleum University filed Critical Southwest Petroleum University
Priority to CN201610294584.7A priority Critical patent/CN105927179B/en
Publication of CN105927179A publication Critical patent/CN105927179A/en
Application granted granted Critical
Publication of CN105927179B publication Critical patent/CN105927179B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00Sealing or packing boreholes or wells
    • E21B33/02Surface sealing or packing
    • E21B33/03Well heads; Setting-up thereof
    • E21B33/06Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B44/00Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00Survey of boreholes or wells
    • E21B47/12Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling

Abstract

The invention discloses one kind to suppress expansion type downhole annular blowout preventer, belong to Underwell anti-injection technical field, expansion type downhole annular blowout preventer of suppressing of the invention mainly includes communication module, control module, power plant module and execution module, the packing element for suppressing expansion type downhole annular blowout preventer execution module, which can be weighed into liquid by suppressing sliding block, makes its expansion, and realization is set;When relief passage is connected to, the liquid in packing element is flowed out by relief passage, realizes deblocking.Of the invention suppresses expansion type downhole annular blowout preventer, can repeatedly use, be swift in response, and is suitable for full well section and various well type, and safety coefficient is high, long service life, has new circulation canal connection after setting, is conducive to subsequent kill-job operation.

Description

One kind suppressing expansion type downhole annular blowout preventer and its means of communication
Technical field
The blowout prevention technology that the present invention relates to a kind of during oilfield drilling when generation well kick, blowout.
Background technique
In each task of oil exploration and oil field development, drilling well is played a very important role, and is such as found and is demonstrate,proved Real oil gas structure obtains commercial oil, verifies the hydrocarbon-bearing area and reserves of certified oil gas structure, obtains related oil The geologic information in field and exploitation data, crude oil, which is finally got on ground etc. none from underground, is completed by drilling well , drilling well is an important link of exploration with exploitation petroleum and natural gas resource, is the important hand of exploration and exploitation petroleum Section.
In drilling process, when boring chance oil-gas Layer, if bottom pressure is lower than strata pressure, formation fluid will enter Wellbore, after a large amount of formation fluids enter wellbore, it is possible to generate well kick, blowout, or even kindling etc., lead to major accident.Cause This, in drilling process, an extremely important link for carrying out that the control of oil gas well pressure is drilling safety of adopting an effective measure. It is especially even more so when new block pries into well but since the pressure of high-pressure oil-gas layer is difficult Accurate Prediction, therefore bore The thing that stratum high-pressure oil gas enters wellbore during well happens occasionally.Well kick blowout is all likely to occur in the case of three kinds below Accident: in drilling process, drilling rod process, empty well state are removed.Empty well state generation blowout probability is very low, if making a trip process energy The speed that makes a trip is controlled, excessive suction force is prevented, well kick gas blowout accident occurrence probability can be effectively reduced, and is crept into In the process because can not Accurate Prediction high-pressure oil gas stressor layer, occur well kick blowout maximum probability.
When finding well kick, blowout sign, carry out closing well and kill-job operation rapidly and efficiently is to effectively reduce gas blowout accident Important guarantee.Traditional closing well operation (the multi-purpose soft closing in the country) is: after discovery well kick, first opening throttle valve, turns off anti- Spray apparatus, it is small to wellhead assembly and annular space water hammer in this way, but since its closed-in time is long, formation fluid intrusion volume is larger, volume Outer increased formation fluid also can have additonal pressure to wellhead assembly and stratum, can bring difficulty to kill-job.
Currently, the preventer used in the process of oilfield drilling is installed on well head more, and in drilling process, the nearly drill bit of drill string Place, which will be installed arrow type check-valves, prevents the adverse current of fluid in drill string, and wellhead blowout preventor is chiefly used in excluder ring in drilling process Sky just carries out full hole shut-in well only when carrying out cutting drilling rod operation.When operator has found that underground can on well After the well kick phenomenon of energy, opening control system completes the operation of wellhead blowout preventor closing well, to prevent gas blowout accident.This kind of blowout prevention The movement of device, it is necessary to by the experience and sense of responsibility of operator, be likely to prevent gas blowout accident.If operator's Carelessness when experience is insufficient or work, fails to find well kick or blowout sign in time, serious accident will occur.And it passes For the wellhead blowout preventor of system after closing well operation, progress replaces the mud lubrication operating time long, will lead to more bottoms streams and invades Enter in pit shaft, increase down-hole annular pressure difference, to increase the difficulty of control blowout.If a kind of down-hole annular therefore can be invented Preventer is with drill string G.I.H, when ground receives shaft bottom well kick blowout signal, operation downhole annular blowout preventer packing Annular space, and the check-valves at nearly drill bit can effectively insulate in drill string, and can be above annular packer after packing It is connected in drill string and annular space, in order to the subsequent downhole annular blowout preventer for weighted mud kill-job operation, and this underground of use Annular packer cooperates nearly drill bit check-valves (check valve) and early stage well kick overflow early warning system, can achieve early discovery, morning The well control guideline of processing, and more conventional well control operation is easier to carry out.
Application No. is 200910263415.7, publication No. CN101748984A, date of publication is on 06 23rd, 2010, name The Chinese invention patent application of the downhole blow-out preventer referred to as automatically controlled loaded on the underground in drill string, discloses a kind of Underwell anti-injection Device, although the blowout prevention when preventer can solve well kick to a certain extent, its structure is complicated, and component is more, installation And replacement is relative complex, correspondingly causes expensive, and the preventer is after carrying out blowout prevention, there is no the feelings of pressure difference Under condition, restore the prototype structure of preventer by spring, for reusing, if preventer is inside and outside to still have pressure difference, very Possible spring force is less than pressure difference, and preventer cannot be made to restore to re-use;And spring is easily damaged after being used for multiple times, In preventer use process, spring breaking down, then preventer can not restore, which cannot take out, and result in blockage, Bu Nengzai Secondary reuse brings inconvenience to subsequent operation instead.
Application No. is 201010148874.3, publication No. CN101812981A, date of publication is on 08 23rd, 2010, name Referred to as a kind of Chinese invention patent application of mechanical underground all-in-one blowout preventer, discloses a kind of underground inside and outside integrative blowout prevention Device, which can solve blowout prevention when well kick to a certain extent, but structure is complicated, and be set using pin is cut, and The pin undertakes again to be connected drilling tool up and down and transmits torque effect in drilling process, but drilling process operating condition is severe, especially exists In drilling process, drillstring vibrations are serious, and pin is likely to act on due to fatigue fracture because bearing change shearing force for a long time and becoming torque, because The reliability of this preventer is not high, is easy to that maloperation occurs because of the unexpected fracture of pin, and cause a series of underground Accident.And drilling tool adds very big bit pressure pin could be cut to needs to the lower part when being insulated, and drill string The bit pressure that bottomhole assembly can be born is certain, then the process for cutting pin is just easy to lower drilling tool to damage, is led Cause down-hole accident.It there is also an issue in the application for a patent for invention, if that is, the unprecedented every operation of excluder ring is being all just Often, but annular space packing is not thorough, then the stratum high-pressure oil gas being easy to cause in annular space pours into drilling rod by deflector hole is counter again It is interior, so as to cause the disabler insulated in following arrow type check-valves drilling rod, well control is made to become more to be difficult to operate.And the hair The underground all-in-one blowout preventer of bright application, pin must just stop to bore after cutting, and act drill string and carry out to all-in-one blowout preventer With changing or repairing, that is, it is used only once after going into the well, is unfavorable for repetitive operation use.
Application number 201110138301.7, application publication number CN102235158B, data of publication of application on May 26th, 2011, The Chinese invention patent application of a kind of entitled downhole annular blowout preventer and its assembly technology, working principle is: when underground occurs to overflow When stream, drill string is transferred, the hole realizing the setting of packing element, while opening in top connection is docked with the hole on central tube, it is established that new Circulation canal is conducive to the kill-job of next step.Above propose the deblocking that drill string drill string is able to achieve packing element.This design is able to achieve preventer Reuse.But the operation of this preventer needs artificial decentralization drill string, has certain requirement to the technology of worker, under There can be certain risk during putting drill string, automate weaker.
Summary of the invention
It is an object of the invention to: in view of the above problems, provide that a kind of structure is simple, and use is very convenient, behaviour Make extremely easy device;It can ensure that drilling process is safe and reliable using the annular blowout preventer;The device is skillfully constructed, knot Structure is simple, high reliablity, have very high feasibility, be suitble to promote, can shunt in a well and unseal rapidly, effectively prevent well kick and Blowout, and be not necessarily to out drill string and carried out preventer replacement, it can reuse, reduce totle drilling cost.
The technical solution adopted by the invention is as follows:
Downhole annular blowout preventer of the invention, it includes top connection, annular space sliding block, outer sleeve, central tube, motor, fixation Cylinder, hub suppress sliding block, limit switch, check valve, upper rubber tube seat, packing element, lower rubber cylinder seat and lower contact;The central tube It is cased with top connection and lower contact outside and is connect with central tube using being screwed, the top connection is provided with annular space sliding slot, and annular space is sliding Slot left end is provided with blow vent, and top connection is provided with annulus access.
Outer sleeve is used with upper and lower connector and is the most easily threadedly coupled due to the above structure, so that cooperation More closely, the annular space sliding slot of top connection is matched with annular space sliding block, and convenient for the sliding of sliding block, the ventilation sky of sliding slot left end can be with Reduce resistance.Downhole annular blowout preventer of the invention, annular space sliding block and motor use feed screw nut's auxiliary driving, annular space sliding block top It is provided with convex block, the outer sleeve is provided with corresponding groove.
Due to the above structure of use, the power delivery mode power loss of feed screw nut pair is smaller, and transmission is most direct, will Linear motion is changed into the rotary motion of motor, is pushed annular space sliding block, is quickly turned on or off new circulation canal.
Downhole annular blowout preventer of the invention, the motor use hollow-cup motor, and rotor is drag cup rotor, motor Shell use with the integrated mode of fixed cylinder, and upper end stretch out one section of protrusion be embedded in outer sleeve.
The shell of motor uses integrated with fixed cylinder due to the above structure, and fixed cylinder takes part in motor positioning, The part for being embedded in outer sleeve realizes the radial positioning of motor, and battery, control module and motor are separated, and prevents from being disliked The influence of bad environment.
Downhole annular blowout preventer of the invention suppresses sliding block and motor by the way of feed screw nut's auxiliary driving, suppresses cunning The convex block (10-1) and outer sleeve groove (3-2) of block upper end cooperate, and the convex block (10-1) for suppressing sliding block is compressible Spring structure, while convex block (10-1) right end is provided with an inclined wedge.
The power delivery mode power loss of feed screw nut pair is smaller due to the above structure, and transmission is most direct, will Linear motion is changed into the rotary motion of motor, and sliding block is suppressed in promotion, forces the fluid into packing element, realizes sealing, and can press Quick deblocking is able to achieve after the completion of well;The groove composition guide rail of the convex block and outer sleeve on sliding block is suppressed, convenient for suppressing sliding block Sliding, while convex block is provided with inclined wedge and compressible, assembles simple and convenient.
Downhole annular blowout preventer of the invention, limit switch, which is located at, to be suppressed in sliding block annular space, the data transmission of limit switch Line is connected by suppressing the through-hole of sliding block with hub, and limit switch is corresponding with the first signal projector (11-2), second signal Transmitter (11-3), third signal projector (11-4), fourth signal transmitter (11-5).
Control system when signal receiver (10-1) receives the signal of unlike signal transmitter due to the above structure, System takes different movements, and signal entrained by (10-2) is first to close bypass, reconnects relief passage, realizes unloading;(10- 3) signal entrained by is to suppress initial position, is to suppress maximum travel position entrained by (10-4);(11-5) is to open side Logical position.Limit switch makes preventer act fast accurate.
Downhole annular blowout preventer of the invention, the sliding block of suppressing are designed using dual channel, suppress and unload runner respectively not It is identical.
When suppressing due to the above structure, first runner (10-4) be connected to, liquid from suppress storehouse by check valve into Enter packing element, expand packing element, check valve belongs to one-way conduction, so liquid can not be flowed back by check valve.
Downhole annular blowout preventer of the invention, described suppress are provided with relief passage (10-3), upper rubber tube seat on sliding block (10) (13) it is provided on relief passage (13-1), the lower rubber cylinder seat (15) and pin (15-1) form limiting device.
When unloading due to the above structure, relief passage (13-1) is connected to relief passage (10-3), in packing element Liquid is discharged by relief passage from second flow channel, realizes unloading;Sliding row of the pin (15-1) in the groove of lower rubber cylinder seat Journey limits the stroke of packing element, avoids the packing element displacement excessive.
Downhole annular blowout preventer of the invention, using mud-pressure pulses communication modes, the communication module includes ground Control centre, encoder, pulse converter, the continuous pulse generator in underground, preventer signal processor, decoder.
Due to using above-mentioned communication modes, ground control centre issues control command, is transmitted to encoder, encoder pair Control command carries out coded treatment by Manchester's code rule, so that it is converted into a pulse train by pulse converter, The pulse train drives the continuous pulse generator in underground that pulse train is converted to mud-pressure pulses sequence, by preventer Signal processor carries out digital filtering to mud-pressure pulses sequence, is transmitted to decoder, carries out to mud-pressure pulses sequence Decoding to obtain the control command on ground, then realizes the control to motor by control module.
Compared with prior art, (1) structure is simple by the present invention, operates extremely simple;(2) the annular blowout preventer energy is used Enough ensure that drilling process is safe and reliable;(3) it can repeatedly use, be suitable for full well section and various well type, safety coefficient Height, long service life have new circulation canal connection, are conducive to subsequent kill-job operation after setting;(4) can shunt in a well rapidly reconciliation Envelope, effectively prevents well kick and blowout, and has been not necessarily to out drill string and has carried out preventer replacement, can reuse, reduce totle drilling cost, With very high feasibility, it is suitble to promote.
Detailed description of the invention
Fig. 1 suppresses expansion type downhole annular blowout preventer structural assembly schematic diagram for of the invention.
Fig. 2 suppresses expansion type downhole annular blowout preventer limit switch partial enlarged view for of the invention.
Fig. 3 suppresses cross-sectional view at expansion type downhole annular blowout preventer A-A for of the invention.
Fig. 4 suppresses cross-sectional view at expansion type downhole annular blowout preventer B-B for of the invention.
Fig. 5 suppresses expansion type downhole annular blowout preventer mud-pressure pulses communication flow figure for of the invention.
Marked in the figure: 1- top connection, 1-1- venthole, 1-2- annular space sliding slot, 1-3- annulus access, 2- annular space sliding block, 3- Outer sleeve, 4- central tube, 5- motor, 6- fixed cylinder, 7- battery, 8- control module, 9- hub, 10- suppress sliding block, 10-1- Compressible sliding block, 10-2- pin, the relief passage 10-3-, 10-4- first runner, 10-5 second flow channel, 11- limit switch, 12- The upper rubber tube seat of check valve, 13-, 14- packing element, 15- lower rubber cylinder seat, 15-1- pin, 16- lower contact.
Specific embodiment
With reference to the accompanying drawing, the present invention is described in detail.
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and It is not used in the restriction present invention.
Specific embodiment 1:
As shown in Figure 1, one kind suppresses expansion type downhole annular blowout preventer, it includes top connection (1), annular space sliding block (2), outer Sleeve (3), motor (5), fixed cylinder (6), hub (9), suppresses sliding block (10), is limit switch (11), unidirectional central tube (4) Valve (12), upper rubber tube seat (13), packing element (14), lower rubber cylinder seat (15) and lower contact (16);Top connection is cased with outside central tube (4) (1) it and lower contact (16) and is connect with central tube (4) using being screwed, top connection (1) is provided with annular space sliding slot (1-2) and annular space Sliding block (2) cooperation, annular space sliding slot left end is provided with blow vent (1-1), and top connection (1) is provided with annulus access (1-3), outer sleeve It uses with upper and lower connector and is the most easily threadedly coupled, so that cooperation is more closely, the annular space sliding slot and annular space of top connection are sliding Block matches, and convenient for the sliding of sliding block, the ventilation sky of annular space sliding slot left end can reduce resistance.It is anti-to suppress expansion type down-hole annular Spray apparatus uses feed screw nut's auxiliary driving, drags the reciprocating motion of annular space sliding block (2), pushes suppress sliding block and annular space sliding block rapidly; Limit switch (11) is by having the first signal projector (11-2), second signal transmitter (11-3), third signal projector (11- 4), fourth signal transmitter (11-5) and signal receiver (11-1) composition, receiver (11-1), which receives different signals, to be made Motor (5) realization is suppressed, is unloaded, establishing new circulation canal;It suppresses sliding block (10) to design using dual channel, suppresses and unload current-carrying Road is different;The outer housing of motor (5) and fixed cylinder (6) are an entirety, and are embedded in outer sleeve and realize that axial and circumferential are fixed Position;Groove (3-1) on the convex block (2-1) and outer sleeve (3) of annular space sliding block (2), which complements each other to form slideway and can be, realizes week To positioning;The convex block (10-1) for suppressing sliding block (10) is compressible spring structure, while convex block (10-1) right end is provided with one Inclined wedge;Check valve (12) can make liquid one-directional flow and enter packing element (14), expand packing element (14);Lower rubber cylinder seat (15) with Pin (15-1) forms limiting device, prevents packing element (14) from deforming when expanding excessive.
Specific embodiment 2:
Based on the device of embodiment 1, expansion type downhole annular blowout preventer blowout prevention method is suppressed are as follows:
1. find overflow, stratum highly pressurised liquid enters in drill string by drill bit to be flowed up, and finds overflow, surface shut-in Afterwards, stratum highly pressurised liquid is entered in drill string by drill bit flows up, and closes jet-preventing tool in the underground near drill bit, blocks Drill string internal channel, meanwhile, the stratum high-pressure fluid in mineshaft annulus needs to take at this time by downhole annular blowout preventer lower contact Blowout prevention procedure.2. issuing control command by ground control centre (a), it is transmitted to encoder (b), encoder (b) is to control command Coded treatment is carried out by Manchester's code rule, so that it is converted into a pulse train, the pulse by pulse converter (c) Sequence drives the continuous pulse generator (d) in underground that pulse train is converted to mud-pressure pulses sequence, believes by preventer Number processor (e) carries out digital filtering to mud-pressure pulses sequence, decoder (f) is transmitted to, to mud-pressure pulses sequence It is decoded, to obtain the control command on ground, then realizes the control to motor by control module (8).
3. motor, under the control of electric signal, by the feed screw nut pair kind of drive, promotion suppresses sliding block (10) for liquid It is pressed into packing element, packing element expansion is made to realize sealing, after the completion of suppressing, annulus access (1-3) is opened, and is formed new circulation canal, is Subsequent kill-job is ready.
4. need to unseal, steps 1 and 2 are repeated, motor, which reversely drags, suppresses sliding block (10), at this time relief passage (10-3) The liquid flow of suppressing of (13-1) connection, packing element returns pressure storehouse, is flowed out by second flow channel (10-5), can close annulus access (1-3) and deblocking.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.

Claims (9)

1. one kind suppresses expansion type downhole annular blowout preventer, it is characterised in that: it includes top connection (1), annular space sliding block (2), outer Sleeve (3), motor (5), fixed cylinder (6), hub (9), suppresses sliding block (10), is limit switch (11), unidirectional central tube (4) Valve (12), upper rubber tube seat (13), packing element (14), lower rubber cylinder seat (15) and lower contact (16);It is cased with and connects outside the central tube (4) Head (1) and lower contact (16), and upper and lower connector is connect with central tube (4) using being screwed, the top connection (1) is provided with ring Empty sliding slot (1-2), annular space sliding slot left end are provided with blow vent (1-1), and top connection (1) is provided with annulus access (1-3);It is described to beat Compression swelling formula downhole annular blowout preventer uses feed screw nut's auxiliary driving;The limit switch (11) is by the first signal projector (11- 2), second signal transmitter (11-3), third signal projector (11-4), fourth signal transmitter (11-5) and signal receiver (11-1) composition;The sliding block (10) of suppressing is designed using dual channel;The outer housing of the motor (5) and fixed cylinder (6) are one A entirety;Convex block (2-1) is housed on the annular space sliding block (2), is provided with groove (3-1) on outer sleeve (3);It is described to suppress sliding block (10) convex block (10-1) is compressible spring structure, while convex block (10-1) right end is provided with an inclined wedge;The lower rubber cylinder Seat (15) and pin (15-1) form limiting device;The expansion type downhole annular blowout preventer of suppressing is led to using mud-pressure pulses News mode, the communication modes are using pulse converter (c), the continuous pulse generator (d) in underground by ground control centre (a) Control signal finally received by the control module of downhole annular blowout preventer (8) by a series of processing transcoding filter, from And realize the control to motor.
2. suppressing expansion type downhole annular blowout preventer as described in claim 1, it is characterised in that: the annular space sliding block (2) with Motor (5) uses feed screw nut's auxiliary driving, and annular space sliding block (2) top is provided with convex block (2-1), and the outer sleeve (3) is provided with correspondence Groove (3-1).
3. suppressing expansion type downhole annular blowout preventer as described in claim 1, it is characterised in that: the motor (5) is using empty Heart cup motor, rotor are drag cup rotor, and the outer housing of motor (5) uses and fixed cylinder (6) integrated mode;Fixed cylinder (6) upper end protrusion is embedded in outer sleeve (3), and battery (7), control module (8), motor (5) are housed inside fixed cylinder (6).
4. suppressing expansion type downhole annular blowout preventer as described in claim 1, it is characterised in that: it is described suppress sliding block (10) with Motor (5) suppresses the convex block (10-1) and outer sleeve (3) groove of sliding block (10) upper end by the way of feed screw nut's auxiliary driving (3-2) cooperates, and suppresses the convex block (10-1) of sliding block (10) as compressible spring structure, while convex block (10-1) right end It is provided with an inclined wedge.
5. suppressing expansion type downhole annular blowout preventer as described in claim 1, it is characterised in that: limit switch (11) position In suppressing in sliding block (10) annular space, the data line of limit switch is connected by suppressing the through-hole of sliding block (10) with hub, Limit switch (11) is corresponding with the first signal projector (11-2), second signal transmitter (11-3), third signal projector (11-4), fourth signal transmitter (11-5).
6. suppressing expansion type downhole annular blowout preventer as described in claim 1, it is characterised in that: the sliding block (10) of suppressing is adopted It is designed with dual channel, suppress and unloads runner and is different.
7. suppressing expansion type downhole annular blowout preventer as described in claim 1, it is characterised in that: described to suppress on sliding block (10) It is provided with relief passage (10-3), is provided with relief passage (13-1) on upper rubber tube seat (13), the lower rubber cylinder seat (15) and pin (15-1) forms limiting device.
8. suppressing expansion type downhole annular blowout preventer as described in claim 1, it is characterised in that: logical using mud-pressure pulses News mode, the communication modes include ground control centre (a), encoder (b), pulse converter (c), the continuous wave impulse in underground Generator (d), preventer signal processor (e), decoder (f).
9. suppressing expansion type downhole annular blowout preventer as described in claim 1, it is characterised in that: by ground control centre (a) Control command is issued, is transmitted to encoder (b), encoder (b) is carried out at coding control command by Manchester's code rule Reason makes it be converted into a pulse train by pulse converter (c), which drives the continuous pulse generator in underground (d) pulse train is converted into mud-pressure pulses sequence, by preventer signal processor (e) to mud-pressure pulses sequence Digital filtering is carried out, decoder (f) is transmitted to, mud-pressure pulses sequence is decoded, to obtain the control life on ground It enables, then realizes the control to motor by control module (8).
CN201610294584.7A 2016-05-06 2016-05-06 One kind suppressing expansion type downhole annular blowout preventer and its means of communication Active CN105927179B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610294584.7A CN105927179B (en) 2016-05-06 2016-05-06 One kind suppressing expansion type downhole annular blowout preventer and its means of communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610294584.7A CN105927179B (en) 2016-05-06 2016-05-06 One kind suppressing expansion type downhole annular blowout preventer and its means of communication

Publications (2)

Publication Number Publication Date
CN105927179A CN105927179A (en) 2016-09-07
CN105927179B true CN105927179B (en) 2019-06-18

Family

ID=56835382

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610294584.7A Active CN105927179B (en) 2016-05-06 2016-05-06 One kind suppressing expansion type downhole annular blowout preventer and its means of communication

Country Status (1)

Country Link
CN (1) CN105927179B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108386153A (en) * 2018-03-16 2018-08-10 江苏航天鸿鹏数控机械有限公司 Pass through the extension hanger and its control method of the rotation control of ground drilling rod
CN108386152A (en) * 2018-03-16 2018-08-10 江苏航天鸿鹏数控机械有限公司 The extension hanger and its control method controlled by ground bit pressure
CN108518195A (en) * 2018-03-16 2018-09-11 江苏航天鸿鹏数控机械有限公司 Time-controlled extension hanger and its control method
CN108468525A (en) * 2018-03-16 2018-08-31 江苏航天鸿鹏数控机械有限公司 The extension hanger and its control method controlled by electromagnetic wave
CN108468531A (en) * 2018-03-16 2018-08-31 江苏航天鸿鹏数控机械有限公司 Pass through the underground back-pressure valve and control method of drilling rod speed Control
CN108533215A (en) * 2018-03-16 2018-09-14 江苏航天鸿鹏数控机械有限公司 The underground back-pressure valve and control method controlled by ground tubing string acoustic communication
CN108518201A (en) * 2018-03-16 2018-09-11 江苏航天鸿鹏数控机械有限公司 A kind of anti-overflow self-starting underground back-pressure valve
CN108412450A (en) * 2018-03-16 2018-08-17 江苏航天鸿鹏数控机械有限公司 The extension hanger and its control method controlled by ground RFID communication ball
CN109267962A (en) * 2018-09-29 2019-01-25 西南石油大学 A kind of motor driven compression rubber downhole blow-out preventer

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4308918A (en) * 1979-11-08 1982-01-05 Bonnie Corp. Blowout preventer
CN201599007U (en) * 2010-01-01 2010-10-06 西南石油大学 Ball valve type internal and external integrated downhole blow-out preventer
CN102235158A (en) * 2011-05-26 2011-11-09 西南石油大学 Underground annular blowout preventer and assembly process thereof
CN202090887U (en) * 2011-05-26 2011-12-28 西南石油大学 Downhole annular blowout preventer
CN104314506A (en) * 2014-10-10 2015-01-28 长江大学 Electric-control compression type downhole blow-out preventer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4308918A (en) * 1979-11-08 1982-01-05 Bonnie Corp. Blowout preventer
CN201599007U (en) * 2010-01-01 2010-10-06 西南石油大学 Ball valve type internal and external integrated downhole blow-out preventer
CN102235158A (en) * 2011-05-26 2011-11-09 西南石油大学 Underground annular blowout preventer and assembly process thereof
CN202090887U (en) * 2011-05-26 2011-12-28 西南石油大学 Downhole annular blowout preventer
CN104314506A (en) * 2014-10-10 2015-01-28 长江大学 Electric-control compression type downhole blow-out preventer

Also Published As

Publication number Publication date
CN105927179A (en) 2016-09-07

Similar Documents

Publication Publication Date Title
US9951600B2 (en) Managed pressure cementing
AU2018202882B2 (en) Bidirectional downhole isolation valve
US20190100979A1 (en) Signal operated isolation valve
US9359890B2 (en) Method of and apparatus for completing a well
CA2852201C (en) Packoff for liner deployment assembly
US10513901B2 (en) Downhole tool for removing a casing portion
AU2014205066B2 (en) Surge immune liner setting tool
US6732804B2 (en) Dynamic mudcap drilling and well control system
US5181571A (en) Well casing flotation device and method
US5890537A (en) Wiper plug launching system for cementing casing and liners
US4347900A (en) Hydraulic connector apparatus and method
US4425965A (en) Safety system for submersible pump
AU2016203159B2 (en) Telemetry operated setting tool
CA2292663C (en) Valve for use in a wellbore
US7165610B2 (en) Removable seal
US4986361A (en) Well casing flotation device and method
US10138710B2 (en) Bidirectional downhole isolation valve
RU2586129C1 (en) System and method of controlling pressure in annular space of well shaft using gas-lift in return line of drilling mud
CA2349816C (en) Downhole well-control valve reservoir monitoring and drawdown optimization system
US8622131B2 (en) Equipment for remote launching of cementing plugs
US4298077A (en) Circulation valve for in-hole motors
US3554281A (en) Retrievable circulating valve insertable in a string of well tubing
US20090255684A1 (en) System and method for thru tubing deepening of gas lift
US20100206584A1 (en) Downhole tubular connector
US8403059B2 (en) External jet pump for dual gradient drilling

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
CB03 Change of inventor or designer information
CB03 Change of inventor or designer information

Inventor after: Li Wei

Inventor after: Song Jinli

Inventor after: Zhou Yanzhu

Inventor after: Luo Xianke

Inventor after: Li Guolin

Inventor after: Chen Jian

Inventor after: Xia Yang

Inventor after: Song Wei

Inventor after: Lei Hongxiang

Inventor after: Yuan Shengtong

Inventor after: Sun Qie

Inventor after: Ning Dian

Inventor after: Yang Bo

Inventor after: Yang Mu

Inventor before: Li Wei

Inventor before: Zhou Yanzhu

Inventor before: Luo Xianke

Inventor before: Li Guolin

Inventor before: Chen Jian

Inventor before: Song Wei

Inventor before: Lei Hongxiang

Inventor before: Yuan Shengtong

Inventor before: Sun Qie

Inventor before: Ning Dian

Inventor before: Yang Bo

Inventor before: Yang Mu

Inventor before: Song Jinli

GR01 Patent grant
GR01 Patent grant