CN105822251B - Motor-driven extrusion type underground annular blowout preventer and communication method thereof - Google Patents
Motor-driven extrusion type underground annular blowout preventer and communication method thereof Download PDFInfo
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- 238000004891 communication Methods 0.000 title claims abstract description 35
- 238000001125 extrusion Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 27
- 238000007906 compression Methods 0.000 claims description 37
- 230000006835 compression Effects 0.000 claims description 36
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 claims 2
- 230000002457 bidirectional effect Effects 0.000 claims 1
- 230000002265 prevention Effects 0.000 abstract description 11
- 238000005553 drilling Methods 0.000 description 29
- 230000008569 process Effects 0.000 description 19
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- 238000007789 sealing Methods 0.000 description 10
- 239000007789 gas Substances 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 8
- 239000012530 fluid Substances 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 5
- 238000012856 packing Methods 0.000 description 5
- 238000010008 shearing Methods 0.000 description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 3
- 235000017491 Bambusa tulda Nutrition 0.000 description 3
- 241001330002 Bambuseae Species 0.000 description 3
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- 230000009471 action Effects 0.000 description 3
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- 238000011161 development Methods 0.000 description 2
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
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- 239000010779 crude oil Substances 0.000 description 1
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- 230000009365 direct transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B44/00—Automatic 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
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Abstract
The invention discloses a motor-driven extrusion type underground annular blowout preventer, which belongs to the technical field of underground blowout prevention and mainly comprises a communication module, a control module, a power module and an execution module; the motor-driven underground annular blowout preventer can be repeatedly used for multiple times, is suitable for multiple well types and can be used in a whole well section, is driven by a motor, is easier to set and unset, is higher in efficiency, and is wide in application prospect.
Description
Technical Field
The invention relates to a blowout prevention technology when well kick and blowout occur in the drilling process of an oil and gas field.
Background
In various tasks of oil exploration and oil field development, well drilling plays an important role, such as searching and verifying oil-gas-containing structures, obtaining industrial oil flow, ascertaining the oil-gas-containing area and the storage volume of the verified oil-gas-containing structures, obtaining geological data and development data related to oil fields, finally taking crude oil from the underground to the ground and the like, which are not completed by well drilling, wherein the well drilling is an important link for exploring and exploiting oil and natural gas resources and is an important means for exploring and developing oil.
During drilling, when an oil-gas layer is encountered, if the bottom hole pressure is lower than the formation pressure, formation fluid can enter a borehole, and after a large amount of formation fluid enters the borehole, well kick, blowout, even fire and the like can be generated, so that a serious accident is caused. Therefore, in the drilling process, effective measures are taken to control the pressure of the oil and gas well, which is an extremely important link of the drilling safety. However, because the pressure in a high pressure hydrocarbon reservoir is difficult to predict accurately, especially when a new block is drilled into the well, it is not uncommon for high pressure hydrocarbons from the formation to enter the wellbore during drilling. The well kick and blowout accidents can happen under the following three conditions, namely, the drilling process, the drill pipe tripping process and the empty well state. The probability of the occurrence of the well blowout in the empty well state is very low, if the tripping speed can be controlled well in the tripping process, the overlarge suction force is prevented, the probability of the occurrence of the well blowout accident can be effectively reduced, and the probability of the occurrence of the well blowout is the maximum due to the fact that the pressure of a high-pressure oil-gas layer cannot be accurately predicted in the drilling process.
When the symptoms of well kick and blowout are found, the rapid and efficient well shut-in and well killing operation is an important guarantee for effectively reducing the blowout accidents. The traditional well closing operation (domestic multi-purpose soft well closing) is as follows: after the well kick is found, the throttle valve is opened firstly, then the blowout preventer is closed, so that the water hammer effect on the wellhead device and the annulus is small, but because the well closing time is long, the invasion amount of formation fluid is large, and additionally increased formation fluid can also have additional pressure on the wellhead device and the formation, so that the well killing is difficult.
At present, blowout preventers used in the drilling process of oil and gas fields are mostly arranged on a well head, an arrow check valve is arranged at the position, close to a drill bit, of a drill column to prevent the fluid in the drill column from flowing reversely in the drilling process, the wellhead blowout preventers are mostly used for sealing off annular spaces in the drilling process, and the whole well is sealed only when the drill rod needs to be cut off. When the operator finds possible well kick on the well, the control system is started to complete the well closing operation of the wellhead blowout preventer, so as to prevent the occurrence of well blowout accidents. The operation of such blowout preventers must rely on the experience and responsibility of the operator to prevent the occurrence of a blowout accident. Serious accidents can occur if the operator is inexperienced or careless at work and fails to discover the signs of a kick or blowout in a timely manner. And the conventional wellhead blowout preventer has long time for replacing mud and killing a well after closing the well, so that more bottom fluid can invade a shaft, the underground annular pressure difference is increased, and the difficulty in controlling blowout is increased. Therefore, if the downhole annular blowout preventer can be lowered into a well along with a drill string, when a downhole well kick blowout signal is received on the ground, the downhole annular blowout preventer is operated to seal the annulus, the check valve at the position close to the drill bit can effectively seal the drill string, and the drill string and the annulus can be communicated above the annular packer after sealing, so that the subsequent downhole annular blowout preventer replacing heavy mud well killing operation can be facilitated.
The application number is 200910263415.7, the publication number is CN101748984A, the publication number is 2010, 06 and 23, and the name is a Chinese patent application of an underground automatic control underground blowout preventer installed in a drill string, which discloses an underground blowout preventer, although the blowout preventer can solve blowout prevention during well kick to a certain extent, the structure is complex, the number of components is more, the installation and replacement are relatively complex, and accordingly, the cost is high, and after blowout prevention is performed, the original structure of the blowout preventer is recovered through a spring under the condition that no pressure difference exists after the blowout preventer is subjected to blowout prevention, so that the blowout preventer can be recycled, if the pressure difference still exists inside and outside the blowout preventer, the spring force is probably smaller than the pressure difference, and the blowout preventer cannot be recovered and reused; and the spring is easy to damage after being used for many times, and when the blowout preventer is used, the spring is damaged, the blowout preventer cannot be recovered, the blowout preventer cannot be taken out, so that blockage is caused, the blowout preventer cannot be reused, and inconvenience is brought to subsequent operation.
The application number is 201010148874.3, the publication number is CN101812981A, the publication number is 2010, 08 and 23, and the Chinese patent application is named as a mechanical underground internal and external integrated blowout preventer, and discloses an underground internal and external integrated blowout preventer which can solve blowout prevention during well kick to a certain extent, but has a complex structure, and is sealed by adopting a shearing pin, and the pin is used for connecting an upper drilling tool and a lower drilling tool and transmitting torque in a drilling process, but the working condition of the drilling process is severe, particularly in the drilling process, the vibration of a drill string is severe, and the pin is likely to be subjected to fatigue fracture due to the effect of variable shearing force and variable torque for a long time, so that the reliability of the blowout preventer is not high, misoperation is easily caused by the accidental fracture of the pin, and a series of underground accidents are caused. And when packing is needed, the lower drilling tool needs to be added with large bit pressure to cut the pin, and the bit pressure which can be borne by the drilling tool assembly at the lower part of the drill string is certain, so that the lower drilling tool is easily damaged in the process of cutting the pin, and the underground accident is caused. The invention also has a problem that if all operations before annular space is sealed are normal, but annular space sealing is not thorough, stratum high-pressure oil gas in the annular space is easily back-injected into a drill rod through a flow guide hole, so that the function of sealing in the drill rod of the lower arrow check valve is failed, and well control becomes more difficult to operate. In addition, the underground internal and external integrated blowout preventer disclosed by the invention has the advantages that the drilling must be stopped after the pin is cut off, and the drill string is pulled out to replace or maintain the internal and external integrated blowout preventer, namely, the underground internal and external integrated blowout preventer can be used only once after being put into a well, so that the underground internal and external integrated blowout preventer is not beneficial to repeated operation and use.
The invention discloses a Chinese patent application named as a downhole annular blowout preventer and an assembly process thereof, wherein the Chinese patent application is named as application No. 201110138301.7, application publication No. CN102235158B, application publication No. 2011, 5, 26 and has the working principle that: when the underground overflow occurs, the drill column is lowered to realize the seat sealing of the rubber barrel, and meanwhile, the hole formed in the upper joint is in butt joint with the hole in the central barrel to establish a new circulation channel, so that the next well killing is facilitated. The rubber sleeve can be unsealed by lifting the drill stem of the drill string. This design enables the reuse of the blowout preventer. However, the operation of the blowout preventer requires manual lowering of the drill string, and has certain requirements on the technique of workers, certain dangerousness exists in the process of lowering the drill string, and the automation is weak.
Disclosure of Invention
The invention aims to: aiming at the problems, the device has simple structure, convenient use and extremely simple and easy operation; the annular blowout preventer can ensure the safety and reliability of the drilling process, and the motor can transmit larger torque to ensure the smooth operation of the drilling process; the device has the advantages of ingenious conception, simple structure, high reliability, high feasibility, suitability for popularization, rapid well sealing and unsealing, effective prevention of well kick and blowout, no need of pulling out a drill stem for blowout preventer replacement, repeated use and total cost reduction.
The technical scheme adopted by the invention is as follows:
the invention discloses a downhole annular blowout preventer, which comprises a communication module, a control module, a power module and an execution module; the communication module comprises an upper joint, a fixed cylinder and a signal transmitting and receiving device; the control module comprises a sound wave control system, an outer sleeve and a central cylinder; the power module comprises a battery and a motor; the execution module comprises a compression cylinder, a rubber cylinder upper joint, a rubber cylinder lower joint and a lower joint.
Due to the adoption of the structure, the motor drives the extrusion type underground annular blowout preventer to rotate forward and backward under the control of the control module, power is transmitted to the compression cylinder of the power module, and the compression cylinder compresses the rubber cylinder or reversely drags the rubber cylinder to seal and unseal the blowout preventer.
The invention relates to an underground annular blowout preventer, which is characterized in that a fixed cylinder, a motor, a compression cylinder and a rubber cylinder are sleeved outside a central cylinder; the central cylinder is respectively in threaded connection with the upper joint and the lower joint, and the compression cylinder and the motor of the power module adopt a transmission mode of a screw-nut pair.
By adopting the structure, the outer sleeve and the upper joint are connected by the most convenient thread, so that the matching is more compact, the power loss adopted by the power transmission mode is smaller, the most direct transmission mode of the screw-nut pair is adopted, the rotary motion of the motor is changed into linear motion, and the compression cylinder is pushed to extrude the rubber cylinder. The purpose of sealing off the annular space is achieved, and quick unsealing can be achieved after the well killing is completed.
The downhole annular blowout preventer is characterized in that thrust bearings are arranged at two ends of a motor, a groove (19) is formed in an outer sleeve, and a protrusion (21) and a groove (20) are formed between a compression sleeve and the outer sleeve respectively; and the two annular cavities are arranged in the fixed cylinder between the upper joint and the motor.
Due to the adoption of the structure, the thrust bearings (9) at the two ends of the motor axially position the motor, and the groove (19) on the outer sleeve and the bulge on the motor shell radially position the motor to prevent the motor from rotating; a bulge (21) and a groove (20) are respectively arranged between the compression cylinder and the outer sleeve to radially position the compression cylinder, so that the compression cylinder is prevented from radially rotating when compressing the rubber cylinder; two rings of the fixed cylinder inside between upper joint and motor hold the intracavity and install sound wave control system (3) and battery (5), and open fixed cylinder (4) one side has the through-wire hole, with sound wave control system and battery dress and fixed cylinder in protection control system and the battery that can be fine, avoid receiving the influence of adverse circumstances in the pit.
According to the underground annular blowout preventer, the rubber cylinder is connected with the upper joint of the rubber cylinder and the lower joint of the rubber cylinder in an embedded structure, the compression cylinder is connected with the upper joint of the rubber cylinder through the pin (12), and the lower joint (10) of the rubber cylinder is connected with the lower joint (18) through the pin (17).
Due to the adoption of the structure, the rubber cylinder and the compression cylinder can keep synchronous stroke, particularly, when deblocking is carried out, the rubber cylinder joint and the compression cylinder are connected through the pin to drag the rubber cylinder to deblock, so that the condition that the rubber cylinder cannot be recovered is avoided, and the rubber cylinder deblocking device is simple in structure and high in reliability; adopt pin (17) to link together between packing element lower clutch and the lower clutch, if the motor deblocking became invalid or other reasons can't the during operation, just need emergent deblocking, lift the drilling string when the manual work, the center section of thick bamboo will drive the lower clutch upward movement to will produce shearing action with the lower clutch of packing element at pin junction lower clutch, the pin of here will be cut off, and then reach the purpose of emergent deblocking. The capability of adapting to severe environment is stronger.
The invention relates to a downhole annular blowout preventer.A compression cylinder is provided with a circulating hole (11) and a central cylinder is provided with a circulating hole (13).
Due to the adoption of the structure, the circulating holes (11) and (13) are formed in the center cylinder and the compression cylinder, and when the motor rotates to enable the compression cylinder to compress the rubber cylinder to form an annular space, the circulating holes in the center cylinder and the compression cylinder are just aligned, so that a new circulating channel is formed, and preparation is made for subsequent well killing.
The underground annular blowout preventer adopts a sound wave communication mode, and the communication module mainly comprises a ground control center, a wellhead sound wave communication short section, a relay station and an underground blowout preventer sound wave receiving and transmitting module; wherein the ground control center comprises a radio receiver and a radio transmitter; the wellhead sound wave communication short joint comprises an acoustic-electric transducer and an electric-acoustic transducer; the acoustic transceiver module of the downhole blowout preventer comprises an acoustic-electric transducer and an electric-acoustic transducer.
Due to the adoption of the communication mode, the wireless transmitter (a-2) of the ground control center transmits the control command to the wellhead sound wave communication short joint, the electric signal is converted into the sound wave signal by the electro-acoustic transducer (b-2) in the sound wave communication short section, then the signal is transmitted to the sound wave transceiver module of the underground blowout preventer by the relay station, and then the sound-electric transducer (d-1) in the sound wave transceiver module of the blowout preventer converts the sound wave signal into the electric signal, thereby realizing the control of the motor, and similarly, the electric signal can be converted into the sound wave signal by the electro-acoustic transducer in the sound wave transceiver module of the blowout preventer, the signals are transmitted to the wellhead sound wave communication short section through the relay station, sound-electricity transducers in the sound wave communication short section convert sound wave signals into electric signals, and the electric signals are transmitted to a radio receiver (a-1) of a ground control center (a) to be received. And then the data is transmitted to a computer for processing.
Compared with the prior art, (1) the invention has simple structure and extremely simple and easy operation; (2) the annular blowout preventer can ensure the safety and reliability of the drilling process, can transmit larger torque and ensure the smooth operation of the drilling process; (3) the blowout preventer can be used for quickly sealing and unsealing a well, well kick and blowout are effectively prevented, the blowout preventer does not need to be replaced by pulling out a drill column, the blowout preventer can be repeatedly used, the total cost is reduced, the blowout preventer has high feasibility, and the blowout preventer is suitable for popularization.
Drawings
Fig. 1 is a schematic view of a motor-driven extrusion type downhole annular blowout preventer structural assembly of the present invention.
FIG. 2 is a cross-sectional view at A-A of the motor-driven squeeze downhole annular blowout preventer of the present invention.
FIG. 3 is a cross-sectional view at B-B of the motor-driven squeeze downhole annular blowout preventer of the present invention.
Fig. 4 is a sound wave communication flow chart of the motor-driven extrusion type downhole annular blowout preventer.
The labels in the figure are: 1-upper joint, 2-signal transmitting and receiving device, 3-sound wave control system, 4-fixed cylinder, 5-battery, 6-outer sleeve, 7-central cylinder, 8-motor, 9-thrust bearing, 10-compression cylinder, 11-circulation holes 1, 12-pin, 13-circulation holes 2, 14-rubber cylinder upper joint, 15-rubber cylinder, 16-rubber cylinder lower joint, 17-pin and 18-lower joint.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Specific example 1:
as shown in fig. 1, a motor-driven extrusion type downhole annular blowout preventer comprises an upper joint (1), a fixed cylinder (4), an outer sleeve (6), a central cylinder (7), a motor (8), a compression cylinder (10), a rubber cylinder upper joint (14), a rubber cylinder (15), a rubber cylinder lower joint (16) and a lower joint (18), wherein the fixed cylinder (4), the motor (8), the compression cylinder (10) and the rubber cylinder (15) are sleeved outside the central cylinder (7); the central cylinder (7) is respectively in threaded connection with the upper connector (1) and the lower connector (18), the compression cylinder (10) can compress the rubber cylinder (15) through the compression cylinder (10) under the driving of the motor (8) to realize sealing blowout prevention, the rubber cylinder (15) can be dragged reversely to realize deblocking, the rubber cylinder (15) is compressed and sealed, and meanwhile, the circulating hole (11) of the compression cylinder (10) is aligned with the circulating hole (13) of the central cylinder (7) to form a new circulating channel to prepare for subsequent well killing; thrust bearings (9) are arranged at two ends of the motor (8), and grooves (19) are formed in the outer sleeve (6) and are used for radial and axial positioning respectively; a bulge (21) and a groove (20) are respectively arranged between the compression cylinder (10) and the outer sleeve (6) and are used as guide rails for the compression cylinder (10) to compress the rubber cylinder (15) and radially position the compression cylinder; the sound wave control device is characterized in that two annular cavities in a fixed cylinder (4) between an upper connector (1) and a motor (8) are respectively used for containing a sound wave control system (3) and a battery (5), a through line hole is formed in one side of the fixed cylinder (4), a rubber cylinder (15) is connected with an upper rubber cylinder connector (14) and a lower rubber cylinder connector (16) in an embedded structure, a compression cylinder (10) is connected with the upper rubber cylinder connector (14) through a pin (12), the lower rubber cylinder connector (16) is connected with a lower rubber cylinder connector (18) through a pin (17), the rubber cylinder (15) and the compression cylinder (10) can keep stroke synchronization under the action of the pin, particularly, the rubber cylinder connector and the compression cylinder can be pulled to be unlocked through pin connection during unlocking, the condition that the rubber cylinder cannot be recovered is avoided, the structure is simple, and the reliability is high; adopt pin (17) to link together between packing element lower clutch and the lower clutch, if the motor deblocking became invalid or other reasons can't the during operation, just need emergent deblocking, lift the drilling string when the manual work, the center section of thick bamboo will drive the lower clutch upward movement to will take effect with the lower clutch of packing element at pin junction lower clutch, the pin that reaches here when the power will be cut off, and then reach the purpose of emergent deblocking.
Specific example 2:
based on the device of embodiment 1, the blowout prevention method of the motor-driven extrusion type downhole annular blowout preventer comprises the following steps:
1. and when the overflow is found, the high-pressure stratum liquid enters the drill string through the drill bit and flows upwards, the overflow is found, and after the well is closed on the ground, the high-pressure stratum liquid enters the drill string through the drill bit and flows upwards, so that the underground internal blowout prevention tool near the drill bit is closed, and a channel in the drill string is plugged. Meanwhile, the formation high-pressure fluid in the annular space of the well barrel passes through the lower joint of the downhole blowout preventer, and blowout prevention measures need to be taken at the moment.
2. The control command is transmitted to a wellhead sound wave communication short section (b) by a radio transmitter (a-2) of a ground control center (a), an electric-acoustic transducer (b-2) in the sound wave communication short section (b) converts an electric signal into a sound wave signal, then the signal is transmitted to a sound wave transceiver module (d) of the downhole blowout preventer through a relay station (c), and then the sound wave signal is converted into the electric signal by an acoustic-electric transducer (d-1) in the sound wave transceiver module (d) of the blowout preventer.
3. The motor pushes the compression cylinder to extrude the rubber cylinder to realize sealing through the screw-nut pair under the control of an electric signal, and meanwhile, the circulation hole (11) of the compression cylinder is aligned with the circulation hole (13) of the central cylinder to form a new circulation channel to prepare for subsequent well killing.
4. Meanwhile, various underground data can be converted into sound wave signals by an electro-acoustic converter (d-2) in a blowout preventer sound wave transceiving module (d), the sound wave signals are transmitted to a wellhead sound wave communication short section (b) through a relay station (c), the sound-electric transducer (b-1) in the sound wave communication short section (b) converts the sound wave signals into electric signals, and the electric signals are transmitted to a radio receiver (a-1) of a ground control center (a) to receive the signals. And then the data is transmitted to a computer for processing.
5. When the deblocking is needed, the steps 1, 2 and 3 are repeated, the motor reversely drags the rubber cylinder to enable the rubber cylinder to recover deformation, and then the deblocking can be realized
6. Just need emergent deblocking, when the manual work lifts the drilling string, the center section of thick bamboo will drive lower clutch upward movement to will produce the shearing action with the lower clutch of rubber tube at the pin junction lower clutch, the pin at this place will be cut off, and then reach the purpose of emergent deblocking.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The utility model provides a motor drive extrusion formula annular blowout preventer in pit which characterized in that: the device comprises a communication module (I), a control module (II), a power module (III) and an execution module (IV):
the communication module (I) comprises an upper joint (1), a signal transmitting and receiving device (2) and a fixed cylinder (4); the control module (II) comprises a sound wave control system (3), an outer sleeve (6) and a central cylinder (7); the power module (III) comprises a battery (5) and a motor (8); the execution module (IV) comprises a compression cylinder (10), a rubber cylinder upper joint (14), a rubber cylinder (15), a rubber cylinder lower joint (16) and a lower joint (18); the motor drives the extrusion type underground annular blowout preventer to realize wireless communication in a sound wave communication mode, the control module is provided with an electro-acoustic transducer (d-2) and an acoustic-electric transducer (d-1) to realize bidirectional transmission of signals, control commands are transmitted from the ground to the underground to realize remote control of the motor, and the working condition of the motor driving the extrusion type underground blowout preventer and relevant parameters of the work of the motor (8) can also be transmitted to a control center on the ground through a sound wave signal transmission system; the rubber cylinder (15) is connected with the upper rubber cylinder joint (14) and the lower rubber cylinder joint (16) by adopting an embedded structure; the compression cylinder (10) is connected with the rubber cylinder upper joint (14) through a pin (12), and the rubber cylinder lower joint (16) is connected with the rubber cylinder lower joint (18) through a pin (17); the compression cylinder (10) is provided with a circulation hole (11) and the central cylinder (7) is provided with a circulation hole (13).
2. The motor-driven extrusion-type downhole annular blowout preventer of claim 1, wherein: the fixed cylinder (4), the motor (8), the compression cylinder (10) and the rubber cylinder (15) are sleeved outside the central cylinder (7); the central cylinder (7) is in threaded connection with the upper joint (1) and the lower joint (18) respectively, and the compression cylinder (10) and the motor (8) of the execution module (IV) adopt a transmission mode of a screw nut pair.
3. The motor-driven extrusion-type downhole annular blowout preventer of claim 1, wherein: thrust bearings (9) are mounted at two ends of the motor (8), grooves (19) are formed in the outer sleeve (6), and protrusions (21) and grooves (20) are formed in the compression cylinder (10) and the outer sleeve (6) respectively.
4. The motor-driven extrusion-type downhole annular blowout preventer of claim 1, wherein: two annular cavities in the fixed cylinder (4) between the upper joint (1) and the motor (8), a sound wave control system (3) and a battery (5) are arranged in one annular cavity and the other annular cavity, and a through wire hole is formed in one side of the fixed cylinder (4).
5. The communication control method for the motor-driven extrusion type downhole annular blowout preventer according to claim 1 is characterized in that: the communication control method adopts a sound wave communication mode, and the communication module mainly comprises a ground control center (a), a wellhead sound wave communication short section (b), a relay station (c) and an underground blowout preventer sound wave transceiver module (d); wherein the ground control center (a) comprises a radio receiver (a-1) and a radio transmitter (a-2); the wellhead sound wave communication short joint (b) comprises an acoustic-electric transducer (b-1) and an electric-acoustic transducer (b-2); the acoustic transceiver module (d) of the downhole blowout preventer comprises an acoustic-electric transducer (d-1) and an electric-acoustic converter (d-2).
6. The communication control method according to claim 5, wherein: the communication control method comprises the following steps: the control command is transmitted to a wellhead sound wave communication short section (b) by a radio transmitter (a-2) of a ground control center (a), an electric-acoustic transducer (b-2) in the sound wave communication short section (b) converts an electric signal into a sound wave signal, then the signal is transmitted to a sound wave transceiver module (d) of an underground blowout preventer by a relay station (c), then the sound wave signal is converted into the electric signal by an acoustic-acoustic transducer (d-1) in the sound wave transceiver module (d) of the blowout preventer, so that the control of a motor (8) is realized, and similarly, the electric signal can be converted into the sound wave signal by the electric-acoustic transducer (d-2) in the sound wave transceiver module (d) of the blowout preventer under the working condition of the motor (8), the electric signal is transmitted to the wellhead sound wave communication short section (b) by the relay station (c), and the sound wave signal is converted into the electric signal by the acoustic-acoustic transducer (b-1) in the sound wave communication short section (b), then the signals are transmitted to a radio receiver (a-1) of a ground control center (a) to receive the signals, and then the data are transmitted to a computer to be processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN108877459A (en) * | 2018-06-20 | 2018-11-23 | 中国石油集团渤海钻探工程有限公司 | A kind of oil drilling well-control blowout prevention device group teaching simulating device |
| CN109281635A (en) * | 2018-09-29 | 2019-01-29 | 西南石油大学 | A kind of explosion excitation formula downhole annular blowout preventer |
| CN109267962B (en) * | 2018-09-29 | 2024-04-09 | 西南石油大学 | Motor-driven compression rubber cylinder type downhole blowout preventer |
| CN109798085B (en) * | 2019-03-18 | 2021-01-01 | 西南石油大学 | Normally closed type one-way injection downhole blowout preventer |
| CN112305622B (en) * | 2019-08-02 | 2024-05-24 | 中国石油化工股份有限公司 | Resistivity imaging device |
| CN113236176B (en) * | 2021-06-22 | 2022-10-21 | 新疆华隆油田科技股份有限公司 | Electric push rod type packer |
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| CN101812981B (en) * | 2010-04-17 | 2012-09-12 | 西南石油大学 | Mechanical underground all-in-one blowout preventer |
| CN203905940U (en) * | 2014-04-30 | 2014-10-29 | 中国石油化工股份有限公司江汉油田分公司采油工艺研究院 | Oil well sound wave wireless testing system |
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