CN112943109A - Multifunctional integrated pipe column for gas injection, test and operation under pressure and use method - Google Patents

Multifunctional integrated pipe column for gas injection, test and operation under pressure and use method Download PDF

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Publication number
CN112943109A
CN112943109A CN202110034478.6A CN202110034478A CN112943109A CN 112943109 A CN112943109 A CN 112943109A CN 202110034478 A CN202110034478 A CN 202110034478A CN 112943109 A CN112943109 A CN 112943109A
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China
Prior art keywords
packer
gas injection
wall
under pressure
soluble
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Granted
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CN202110034478.6A
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Chinese (zh)
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CN112943109B (en
Inventor
王在强
薛建强
赵广民
任国富
巨亚锋
赵敏琦
李成龙
胡相君
蒙鑫
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Petrochina Co Ltd
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Petrochina Co Ltd
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    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • 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
    • E21B33/12—Packers; Plugs
    • E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
    • E21B33/1265—Packers; Plugs with fluid-pressure-operated elastic cup or skirt with mechanical slips
    • 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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
    • E21B43/168—Injecting a gaseous medium
    • 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
    • E21B47/00—Survey of boreholes or wells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/10—Geothermal energy

Abstract

The invention relates to the technical field of oil field recovery efficiency improvement, in particular to a multifunctional integrated tubular column for gas injection, test and operation under pressure and a use method thereof, wherein an airtight oil sealing pipe, an airtight packer, a working barrel of a packer, a soluble core shearing ball seat and a bell mouth are sequentially connected; the blanking plug working barrel meets the requirement of operation under pressure, and effectively solves the technical problem of blowout prevention in an oil pipe during tripping; the soluble core shearing ball seat can meet the setting requirement of the packer, can maintain enough drift diameter of a shaft through soluble core dissolution, and provides convenient conditions for the running of a gas injection well gas suction profile testing tool; the soluble core and the soluble ball are made of soluble materials, can be completely dissolved under certain media, temperature and pressure, and effectively prevent the falling objects in the shaft from being generated.

Description

Multifunctional integrated pipe column for gas injection, test and operation under pressure and use method
Technical Field
The invention relates to the technical field of oil field recovery enhancement, in particular to a multifunctional integrated tubular column for gas injection, test and operation under pressure and a using method thereof.
Background
At present, a general gas injection process is mostly adopted in gas drive field tests at home and abroad. For a reservoir with a uniform air suction profile, the general air injection can meet the effective displacement requirement of a plurality of sections of oil layers. Traditional general gas injection tubular column exposes more problem: the packer in pit is the key instrument of gas injection tubular column, its main function is the packing oil jacket annular space, prevent to pour into gas and scurries along the oil jacket annular space, guarantee gas injection safety, prevent simultaneously that the annular oil jacket pipe of annulus from producing the corruption after the gas of pouring into meets moisture, the packer ubiquitous that uses at present sealed gas ability is not enough, the casing pressure rise rate is fast, short time oil jacket pressure balance scheduling problem, especially the jack-up tonnage of packer is great, lead to the tubular column to take off absolutely, the emergence of the circumstances such as overhaul. Meanwhile, when an injection well needs to operate, a stratum pressure system can be damaged by air bleeding operation, the cost is increased, an oil layer is polluted by killing operation, gas well operation under pressure is generally adopted, but the requirement of operation under pressure is not considered in the function of a pipe column, and blowout prevention in the oil pipe during tripping in and tripping out becomes a difficult problem. In addition, the conventional gas injection pipe column only considers normal gas injection, and when the gas suction section is required to be tested in the later period, the drift diameter of the pipe column cannot meet the requirement of the running-in of a testing tool, so that the work cannot be implemented. In order to solve the problems, a new technical idea needs to be explored from the design of the tubular column, and a multifunctional integrated tubular column for gas injection, test and operation under pressure and a using method are provided.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides a multifunctional integrated tubular column for gas injection, test and operation under pressure and a using method thereof, in particular to a soluble core shear ball seat which can realize the setting requirement of a packer and also can realize the dissolution of a soluble core, a shaft keeps enough drift diameter and meets the requirement of a gas injection well gas suction profile testing tool to pass. The function of the gas injection pipe column is more perfect, and the requirement of the oil field gas drive test is further met.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
the utility model provides a multi-functional integrated tubular column of gas injection, test and area pressure operation, includes airtight oil pipe, is used for the packer, blanking plug working barrel, ball seat and the horn mouth of deblocking earlier and unfreezing again, airtight oil pipe, packer, blanking plug working barrel, ball seat and the horn mouth of sealing connect gradually.
Further, the packer is an air-tight packer, the air-tight packer comprises an upper joint, a central tube, a setting rubber cylinder, a setting piston, a lower joint, an occlusion mechanism and a deblocking mechanism, the upper joint and the lower joint are respectively connected to two ends of the central tube, the setting rubber cylinder, the setting piston and the occlusion mechanism are all sleeved on the outer wall of the central tube and are positioned between the upper joint and the lower joint, one end of the occlusion mechanism is connected with the upper joint, the other end of the occlusion mechanism is contacted with one end of the setting rubber cylinder, the other end of the setting rubber cylinder is contacted with one end of the setting piston, one end of the deblocking mechanism is connected with the outer wall of the setting piston, the other end of the deblocking mechanism is connected with the lower joint, the outer side walls of two ends of the central tube are respectively provided with an inward-concave outer step of the central tube, a setting piston cavity is arranged between the setting piston and the central tube, the central tube is provided with a hydraulic inlet communicated with the seat seal piston cavity.
Further, the meshing mechanism comprises a connecting sleeve, an upper cone, a slip sleeve, a slip and a lower cone, wherein one end of the connecting sleeve is connected to the outer wall of the upper joint, the other end of the connecting sleeve is clamped to the outer wall of one end of the upper cone, the end portion of the upper cone is in contact with the end portion of the upper joint, the upper cone, the slip and the lower cone are respectively sleeved on the outer wall of the central tube, the cone ends of the upper cone and the lower cone are oppositely arranged, and the slip is located between the upper cone and the lower cone.
Furthermore, the meshing mechanism further comprises a releasing pin and a slip sleeve, one end of the connecting sleeve is connected to the outer wall of the upper joint through the releasing pin, the upper cone and the lower cone are respectively connected with the slip sleeve, and two ends of the slip are respectively located in the two slip sleeves.
Furthermore, the deblocking and unfreezing mechanism comprises a lock sleeve, a lock ring, a support ring and an anti-collision ring, wherein the anti-collision ring is fixedly sleeved on the lower connector, one end of the lock sleeve is connected with the outer wall of the setting piston, the other end of the lock sleeve is connected with the outer wall of the anti-collision ring, the lock ring and the support ring are both located between the inner wall of the lock sleeve and the outer wall of the lower connector, one end of the lock ring is in contact with one end of the support ring, and the support ring is connected with the outer wall of the lower connector.
Further, deblocking card decoding mechanism still include the deblocking pin and start the shear pin, the lock sleeve other end is connected with the outer wall of anticollision ring through starting the shear pin, the support ring is connected with the outer wall of lower clutch through the deblocking pin.
Further, the ball seat be soluble core shearing ball seat, soluble core shearing ball seat includes overcoat, sealing washer and soluble core, and the overcoat is tubular structure, and soluble core sets up in the overcoat, the overcoat includes an upper end and a lower extreme, sets up the sealing washer between the overcoat is located the inner wall of upper end and the outer wall of soluble core, the tip that is located the soluble core of the upper end intracavity of overcoat is used for bearing soluble ball.
Furthermore, the soluble core shearing ball seat also comprises a shearing pin which penetrates through the outer sleeve to be connected with the soluble core.
A method for a multifunctional integrated pipe column for gas injection, test and operation under pressure comprises the following steps:
the gas injection function:
lowering the pipe column to enable the bell mouth at the lower end of the pipe column to be located in an air injection layer, after the pipe column is put in place, throwing the dissolvable ball from the air-tight oil pipe to the upper end of the ball seat to enable a closed space to be formed in the pipe column at the upper end of the ball seat to be suppressed, completing setting of the air-tight packer, improving the pressure, cutting off the shearing pin, enabling the dissolvable core and the dissolvable ball to descend, enabling the dissolvable core and the dissolvable ball to fall into the artificial well bottom through the bell mouth, opening an;
and (4) testing functions:
when the soluble core and the soluble ball fall into the artificial well bottom, the soluble core and the soluble ball are dissolved, and the large drift diameter is realized in the pipe column;
when the inspiration section test needs to be carried out, the test tool is sequentially passed through an airtight oil sealing pipe, an airtight packer, a blanking plug working barrel, a ball seat and a bell mouth to carry out test operation;
the operation function under pressure:
the packer working barrel is arranged on the pipe column, when the later stage needs to be operated under pressure to drill, the packer is thrown into the well mouth from the well mouth, the packer is thrown into the position of the packer working barrel, the rubber barrel of the packer is set, the internal blowout prevention function of the oil pipe is completed, and the operation function under pressure of the pipe column is realized.
Furthermore, the soluble core and the soluble ball are both soluble materials, and the soluble materials can be completely dissolved under certain media, temperature and pressure.
The invention has the beneficial effects that:
compared with the prior art, the invention adds the functions of operation and test under pressure on the premise of ensuring normal gas injection of the tubular column, and has important significance for improving the efficiency and saving the cost of the oil field gas drive test.
The hermetic seal packer realizes the deblocking first and then the deblocking, avoids the deblocking difficulty, and overcomes the occurrence of the situations of pipe column breaking, overhaul and the like; when the drill bit is started, the plug is put into the working barrel, the working barrel is seated, the weighting rod is put in, and the working barrel is sealed by the leather cup, so that the pressurized plugging of an oil pipe is realized, the requirement of pressurized operation is met, and the technical problem of blowout prevention in the oil pipe during the drilling is effectively solved; the soluble core shearing ball seat can meet the setting requirement of the packer, can maintain enough drift diameter of a shaft through soluble core dissolution, and provides convenient conditions for the running of a gas injection well gas suction profile testing tool; the soluble core and the soluble ball are made of soluble materials, can be completely dissolved under certain media, temperature and pressure, and effectively prevent the falling objects in the shaft from being generated.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural view of a multifunctional integrated tubular column for gas injection, testing and operation under pressure according to the present invention.
Fig. 2 is a schematic structural diagram of the hermetic seal packer of the present invention.
Fig. 3 is a schematic structural view of a dissolvable core shear ball seat of the present invention.
In the figure: 1-airtight oil sealing pipe, 2-airtight packer, 3-packer working barrel, 4-ball seat, 5-bell mouth, 6-gas injection layer, 7-artificial well bottom, 8-upper joint, 9-central pipe, 10-unfreezing pin, 11-connecting sleeve, 12-upper cone, 13-slip sleeve, 14-slip, 15-lower cone, 16-setting rubber barrel, 17-setting piston, 18-locking sleeve, 19-lower joint, 20-locking ring, 21-supporting ring, 22-unfreezing pin, 23-starting shear pin, 24-anti-collision ring, 25-central pipe outer step, 26-outer sleeve, 27-sealing ring, 28-shear pin, 29-soluble core and 30-soluble ball.
Detailed Description
The present invention provides a multifunctional integrated column for gas injection, testing and operation under pressure and a method for using the same, which are described in detail below by means of several specific embodiments.
Example 1:
referring to fig. 1, a multi-functional integrated tubular column of gas injection, test and area pressure operation, including airtight oil sealing pipe 1, be used for the packer of deblocking again, blanking plug working barrel 3, ball seat 4 and horn mouth 5, airtight oil sealing pipe 1, packer, blanking plug working barrel 3, ball seat 4 and horn mouth 5 connect gradually.
In the above-mentioned embodiment with airtight oil pipe 1, airtight packer 2, blanking plug working barrel 3, soluble core shearing ball seat 4 and bell mouth 5 connect gradually the back, go into down and transfer the tubular column, make the bell mouth 5 of tubular column lower extreme be located gas injection layer 6, after the tubular column targets in place down, drop into dissolvable ball 30 from airtight oil pipe 1, to 4 upper ends of ball seat, make the tubular column formation airtight space in the upper end of ball seat 4 suppress pressure, accomplish the seat of airtight packer 2 and seal, increase of pressure, dissolvable ball 30 is down in ball seat 4, fall into artificial shaft bottom 7 through bell mouth 5, the gas injection passageway is opened, implement normal gas injection.
After the soluble ball 30 falls into the artificial well bottom 7, the dissolution is realized, and the large drift diameter is realized in the pipe column; when the air suction section test needs to be carried out, the test tool sequentially passes through the airtight oil sealing pipe 1, the packer, the plug working barrel 3, the ball seat 4 and the bell mouth 5 to carry out test operation.
The packer working barrel 3 is arranged on the pipe column, when the later stage needs to be operated under pressure to drill down, the packer is thrown into the well mouth, the packer is thrown to the position of the packer working barrel 3, the rubber sleeve of the packer is set, the inner blowout prevention function of the oil pipe is completed, and the operation function under pressure of the pipe column is realized.
The hermetic seal packer 2 described in the embodiment can realize the unsealing first and then releasing the block, thereby avoiding the difficulty in unsealing. The arranged working barrel 3 of the blanking plug meets the requirement of lifting and lowering the pipe column in operation under pressure. The ball seat 4 can realize the setting requirement of the packer, can realize that the dissoluble ball 30 dissolves again, and the pit shaft keeps sufficient latus rectum, satisfies the demand that the gas injection well section test instrument of breathing in passes through. The function of the gas injection pipe column is more perfect, and the requirement of the oil field gas drive test is further met.
Example 2:
referring to fig. 2, further, the packer is an air-tight packer 2, the air-tight packer 2 includes an upper joint 8, a central tube 9, a setting rubber cylinder 16, a setting piston 17, a lower joint 19, an occlusion mechanism and a deblocking mechanism, the upper joint 8 and the lower joint 19 are respectively connected to two ends of the central tube 9, the setting rubber cylinder 16, the setting piston 17 and the occlusion mechanism are all sleeved on an outer wall of the central tube 9 and are located between the upper joint 8 and the lower joint 19, one end of the occlusion mechanism is connected to the upper joint 8, the other end of the occlusion mechanism is contacted with one end of the setting rubber cylinder 16, the other end of the setting rubber cylinder 16 is contacted with one end of the setting piston 17, one end of the deblocking mechanism is connected to an outer wall of the setting piston 17, the other end of the deblocking mechanism is connected to the lower joint 19, outer side walls of two ends of the central tube 9 are respectively provided with an inner concave outer step 25 of the, a seat seal piston cavity is arranged between the seat seal piston 17 and the central pipe 9, and a hydraulic inlet communicated with the seat seal piston cavity is formed in the central pipe 9.
In the above embodiment, the upper joint 8 is used for being connected with the airtight oil sealing pipe 1, the setting rubber sleeve 16 is used for sealing the inner annulus and the outer annulus in the shaft, the setting piston 17 enters the setting piston cavity through the hydraulic pressure in the central pipe 9 to push, the pressing setting rubber sleeve 16 seals the inner annulus and the outer annulus in the shaft, the occlusion mechanism is used for being occluded with the inner wall of the casing pipe, the deblocking mechanism is used for deblocking and deblocking the packer, when the upper pipe string deblocking and deblocking mechanism loses support, the setting rubber sleeve 16 retracts to realize deblocking, the pipe string is continuously lifted, the central pipe 9 continues to move upwards, when the outer step 25 of the central pipe on the central pipe 9 moves upwards to the position of the slip 14, the slip 14 recovers the packer to realize deblocking, and the deblocking operation is completed. Through this structure has realized that the packer separates the card from current earlier, the deblocking again, because packing element department goes into the setting state during the deblocking, the pressure that the annular space of oil jacket liquid column produced causes great influence to the tonnage of separating the card, changes into the mode of deblocking earlier, separating the card again, realizes the deblocking earlier, sits and seals packing element 16 and withdraws, upper and lower liquid intercommunication, and the tubular column no longer bears liquid column pressure to be favorable to separating the card, improved the rate of recovery of packer.
Example 2:
referring to fig. 2, further, the engagement mechanism includes a connection sleeve 11, an upper cone 12, a slip sleeve 13, a slip 14 and a lower cone 15, one end of the connection sleeve 11 is connected to the outer wall of the upper joint 8, the other end of the connection sleeve 11 is clamped to the outer wall of one end of the upper cone 12, the end of the upper cone 12 contacts with the end of the upper joint 8, the upper cone 12, the slip 14 and the lower cone 15 are respectively sleeved on the outer wall of the central tube 9, the cone ends of the upper cone 12 and the lower cone 15 are arranged oppositely, and the slip 14 is located between the upper cone 12 and the lower cone 15.
Furthermore, the meshing mechanism further comprises a releasing pin 10 and slip sleeves 13, one end of the connecting sleeve 11 is connected to the outer wall of the upper joint 8 through the releasing pin 10, the upper cone 12 and the lower cone 15 are respectively connected with the slip sleeves 13, and two ends of the slip 14 are respectively located in the two slip sleeves 13.
The packer in the above embodiment is an airtight packer 2, and the airtight packer 2 specifically performs the following operations when realizing the first unsealing and then releasing the block: and (3) removing the wellhead lifting airtight oil sealing pipe 1 and the upper joint 8, firstly breaking the upper joint 8 and the unfreezing pin 10 on the connecting sleeve 11, and continuously lifting the upper joint 8 and the central pipe 9, wherein the unfreezing mechanism loses support due to the support of the anchoring force of the slips 14. Therefore, the setting rubber sleeve 16 is in the deblocking state, deblocking action is completed, then the central tube 9 continues to go upwards, when the outer step 25 of the central tube on the central tube 9 goes upwards to the position of the slip 14, the slip 14 recovers the packer to realize releasing the block, the releasing action is completed, and therefore the completion of the deblocking and releasing actions is realized, and the airtight packer 2 is smoothly started.
The setting working principle of the airtight packer 2 is as follows:
hydraulic pressure enters a setting piston cavity from a hydraulic inlet on the central pipe 9, a setting piston 17 is pushed to move upwards to compress a setting rubber cylinder 16, a lower cone 15 is driven, a slip 14 is expanded from the inside of a slip sleeve 13, and the slip 14 is meshed with the inner wall of the sleeve at the moment; and simultaneously, a mechanism in the deblocking and deblocking mechanism is occluded to ensure that the packer is in a permanent setting state.
Example 3:
referring to fig. 2, further, the deblocking and deblocking mechanism includes a lock sleeve 18, a lock ring 20, a support ring 21 and an anti-collision ring 24, the anti-collision ring 24 is fixedly sleeved on the lower joint 19, one end of the lock sleeve 18 is connected with the outer wall of the setting piston 17, the other end of the lock sleeve 18 is connected with the outer wall of the anti-collision ring 24, the lock ring 20 and the support ring 21 are both located between the inner wall of the lock sleeve 18 and the outer wall of the lower joint 19, one end of the lock ring 20 is in contact with one end of the support ring 21, and the support ring 21 is connected with the outer wall of the lower joint 19.
Further, deblocking card decoding mechanism still include deblocking pin 22 and start shear pin 23, the lock sleeve 18 other end is connected with the outer wall of anticollision ring 24 through starting shear pin 23, and support ring 21 is connected with the outer wall of lower clutch 19 through deblocking pin 22.
The unsealing principle of the airtight packer 2 in the above embodiment is as follows:
and (3) removing the airtight oil sealing pipe 1 and the upper joint 8 lifted from the wellhead, firstly breaking the upper joint 8 and the releasing pin 10 on the connecting sleeve 11, continuously lifting the upper joint 8 and the central pipe 9, because of the support of the anchoring force of the slips 14, the releasing pin 22 on the support ring 21 is sheared, the lock ring 20 and the lock sleeve 18 lose support, the setting rubber barrel 16 retracts to be in a releasing state, the central pipe 9 continues to move upwards, when the outer step 25 of the central pipe on the central pipe 9 moves upwards to the position of the slips 14, the slips 14 recover the packer to realize releasing the blockage, the releasing action is completed, and the packer is smoothly lifted out.
When the packer is set, hydraulic pressure enters a setting piston cavity from a hydraulic inlet on a central pipe 9 to push a setting piston 17 to move upwards to compress a setting rubber cylinder 16, a shear pin 23 is started to cut off during pushing, a lock sleeve 18 and the setting piston 17 move upwards to compress the setting rubber cylinder 16 together, when a slip 14 is meshed with the inner wall of a sleeve, the lock sleeve 18 moves upwards to be meshed with a lock ring 20, after the pressure of the central pipe 9 is relieved, the lock ring 20 is supported by a support ring 21, and the packer is in a permanent setting state. The anti-collision ring 24 prevents the pipe string from being damaged by impact.
Example 4:
referring to fig. 3, further, the ball seat 4 is a dissolvable core cutting ball seat, the dissolvable core cutting ball seat comprises an outer sleeve 26, a sealing ring 27 and a dissolvable core 29, the outer sleeve 26 is a cylindrical structure, the dissolvable core 29 is disposed in the outer sleeve 26, the outer sleeve 26 comprises an upper end and a lower end, the sealing ring 27 is disposed between an inner wall of the outer sleeve 26 at the upper end and an outer wall of the dissolvable core 29, and an end of the dissolvable core 29 in an upper end cavity of the outer sleeve 26 is used for bearing the dissolvable ball 30.
Further, the soluble core shear ball seat further comprises a shear pin 28, and the shear pin 28 penetrates through the outer sleeve 26 to be connected with the soluble core 29.
The sealing ring 27 in the above embodiment is used for playing a sealing role when the dissolvable ball 30 is thrown and pressed, the shear pin 28 provides a certain shear force for pressing, the packer setting is ensured, the pressure is continuously raised after the setting is finished, the shear pin 28 is cut off, the dissolvable core 29 and the dissolvable ball 30 fall into the artificial well bottom 7 together, and finally all the dissolvable core is melted down, so that a large drift diameter is realized in a pipe column, a sufficient drift diameter is kept for a shaft, and the requirement of passing a gas injection well gas suction profile testing tool is met.
Example 5:
a use method of a multifunctional integrated pipe column for gas injection, test and operation under pressure comprises the following steps:
the gas injection function:
and (3) lowering the pipe column to enable the bell mouth 5 at the lower end of the pipe column to be located in the gas injection layer 6, after the pipe column is put in place, putting the soluble ball 30 into the gas-tight oil pipe 1 to the upper end of the ball seat 4, enabling a sealed space to be formed in the pipe column at the upper end of the ball seat 4 to be suppressed, completing the setting of the gas-tight packer 2, improving the pressure, cutting the shear pin 28, enabling the soluble core 29 and the soluble ball 30 to go down, falling into the artificial well bottom 7 through the bell mouth 5, opening a gas injection channel, and implementing.
And (4) testing functions:
after the soluble core 29 and the soluble ball 30 fall into the artificial well bottom 7, the dissolution is realized, and the large drift diameter is realized in the pipe column;
when the air suction section test needs to be carried out, the test tool sequentially passes through the airtight oil sealing pipe 1, the airtight packer 2, the plug working barrel 3, the ball seat 4 and the bell mouth 5 to carry out test operation.
The operation function under pressure:
the packer working barrel 3 is arranged on the pipe column, when the later stage needs to be operated under pressure to drill, the packer is thrown into the well mouth, modes such as hydraulic pumping or steel wire operation can be adopted in the throwing mode, the packer is thrown to the position of the packer working barrel 3, the rubber barrel of the packer is set, the internal blowout prevention function of the oil pipe is completed, and the operation function under pressure of the pipe column is realized.
Further, the soluble core 29 and the soluble ball 30 are both soluble materials, and the soluble materials can be completely dissolved under a certain medium, temperature and pressure.
In conclusion, the multifunctional integrated pipe column and the method for gas injection, test and operation under pressure provided by the invention have the advantages that the functions of operation and test under pressure are added on the premise of ensuring normal gas injection of the pipe column, and the multifunctional integrated pipe column and the method have important significance for improving the efficiency and saving the cost of an oil field gas drive test.
The hermetic seal packer 2 realizes the deblocking first and then the deblocking, avoids the deblocking difficulty, and overcomes the occurrence of the situations of pipe column breaking, overhaul and the like; when the drill bit is started, the plug is put into the plug working barrel 3, the working barrel is seated, the weighting rod is put in, and the working barrel is sealed by the leather cup, so that the pressurized plugging of an oil pipe is realized, the requirement of pressurized operation is met, and the technical problem of blowout prevention in the oil pipe during the drilling is effectively solved; the soluble core shearing ball seat can meet the setting requirement of the packer, can maintain enough drift diameter of a shaft through soluble core dissolution, and provides convenient conditions for the running of a gas injection well gas suction profile testing tool; the soluble core 29 and the soluble ball 30 are made of soluble materials, can be completely dissolved under certain media, temperature and pressure, and effectively prevent the shaft from falling objects, and the soluble materials are generally aluminum magnesium alloy. The medium is usually klc solution or active water. The temperature, pressure and medium of different well conditions determine the property of the dissolvable material, generally the temperature is 50-150 ℃, and the pressure is 35-105 MPa.
While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and the scope of the present invention is within the scope of the claims.

Claims (10)

1. The utility model provides a multi-functional integrated tubular column of gas injection, test and area pressure operation which characterized by: the packer comprises an airtight oil sealing pipe (1), a packer for unsealing and then unfreezing, a packer working barrel (3), a ball seat (4) and a horn mouth (5), wherein the airtight oil sealing pipe (1), the packer working barrel (3), the ball seat (4) and the horn mouth (5) are sequentially connected.
2. The multifunctional integrated pipe column for gas injection, testing and operation under pressure of claim 1, which is characterized in that: the packer is an air-tight packer (2), the air-tight packer (2) comprises an upper joint (8), a central pipe (9), a setting rubber cylinder (16), a setting piston (17), a lower joint (19), an occlusion mechanism and a deblocking mechanism, the upper joint (8) and the lower joint (19) are respectively connected with two ends of the central pipe (9), the setting rubber cylinder (16), the setting piston (17) and the occlusion mechanism are all sleeved on the outer wall of the central pipe (9) and are positioned between the upper joint (8) and the lower joint (19), one end of the occlusion mechanism is connected with the upper joint (8), the other end of the occlusion mechanism is contacted with one end of the setting rubber cylinder (16), the other end of the setting rubber cylinder (16) is contacted with one end of the setting piston (17), one end of the deblocking mechanism is connected with the outer wall of the setting piston (17), the other end of the deblocking mechanism is connected with the lower joint (19), the outer side walls of two ends of the central tube (9) are respectively provided with an inner concave outer step (25) of the central tube, a seat seal piston cavity is arranged between the seat seal piston (17) and the central tube (9), and the central tube (9) is provided with a hydraulic inlet communicated with the seat seal piston cavity.
3. The multifunctional integrated gas injection, testing and operation under pressure pipe column of claim 2, wherein: interlock mechanism include adapter sleeve (11), go up cone (12), slip cover (13), slips (14) and lower cone (15), adapter sleeve (11) one end is connected on the outer wall of top connection (8), and adapter sleeve (11) other end joint is on the outer wall of last cone (12) one end, and the tip of going up cone (12) contacts with the tip of top connection (8), go up cone (12), slips (14) and lower cone (15) cup joint respectively on the outer wall of center tube (9), the centrum end of going up cone (12) and lower cone (15) sets up relatively, slips (14) are located between cone (12) and lower cone (15).
4. The multifunctional integrated gas injection, testing and operation under pressure pipe column of claim 3, wherein: the interlocking mechanism further comprises an unlocking pin (10) and slip sleeves (13), one end of the connecting sleeve (11) is connected to the outer wall of the upper joint (8) through the unlocking pin (10), the upper cone (12) and the lower cone (15) are respectively connected with the slip sleeves (13), and two ends of the slip (14) are respectively located in the two slip sleeves (13).
5. The multifunctional integrated gas injection, testing and operation under pressure pipe column of claim 2, 3 or 4, which is characterized in that: the deblocking and de-blocking mechanism comprises a lock sleeve (18), a lock ring (20), a support ring (21) and an anti-collision ring (24), wherein the anti-collision ring (24) is fixedly sleeved on the lower joint (19), one end of the lock sleeve (18) is connected with the outer wall of the setting piston (17), the other end of the lock sleeve (18) is connected with the outer wall of the anti-collision ring (24), the lock ring (20) and the support ring (21) are both located between the inner wall of the lock sleeve (18) and the outer wall of the lower joint (19), one end of the lock ring (20) is in contact with one end of the support ring (21), and the support ring (21) is connected with the outer wall of the lower joint (19).
6. The multifunctional integrated gas injection, testing and operation under pressure pipe column of claim 5, wherein: deblocking card decoding mechanism still include deblocking pin (22) and start shear pin (23), the outer wall connection of lock sleeve (18) other end through starting shear pin (23) and anticollision ring (24), support ring (21) are connected with the outer wall of lower clutch (19) through deblocking pin (22).
7. The multifunctional integrated pipe column for gas injection, testing and operation under pressure of claim 1, which is characterized in that: ball seat (4) cut the ball seat for soluble core, soluble core cuts the ball seat and includes overcoat (26), sealing washer (27) and soluble core (29), overcoat (26) are tubular structure, and soluble core (29) set up in overcoat (26), overcoat (26) include an upper end and a lower extreme, and overcoat (26) are located and set up sealing washer (27) between the inner wall of upper end and the outer wall of soluble core (29), the tip that is located soluble core (29) of the upper end intracavity of overcoat (26) is used for bearing soluble ball (30).
8. The multifunctional integrated gas injection, testing and operation under pressure pipe column of claim 7, wherein: the soluble core shearing ball seat further comprises a shearing pin (28), and the shearing pin (28) penetrates through the outer sleeve (26) to be connected with the soluble core (29).
9. A use method of a multifunctional integrated tubular column for gas injection, test and operation under pressure is characterized in that: the method comprises the following steps:
the gas injection function:
lowering the pipe column to enable the bell mouth (5) at the lower end of the pipe column to be located in the gas injection layer (6), after the pipe column is put in place, putting the dissolvable ball (30) from the gas-tight oil pipe (1) to the upper end of the ball seat (4), enabling a sealed space to be formed in the pipe column at the upper end of the ball seat (4) to be suppressed, completing the setting of the gas-tight packer (2), increasing the pressure, shearing the shearing pin (28), enabling the dissolvable core (29) and the dissolvable ball (30) to go down, falling into the artificial well bottom (7) through the bell mouth (5), opening a gas injection channel, and performing normal gas;
and (4) testing functions:
when the soluble core (29) and the soluble ball (30) fall into the artificial well bottom (7), the dissolution is realized, and the large drift diameter is realized in the pipe column;
when the inspiration section test needs to be carried out, a test tool sequentially passes through an airtight oil sealing pipe (1), an airtight packer (2), a packer working barrel (3), a ball seat (4) and a bell mouth (5) to carry out test operation;
the operation function under pressure:
the tubing string is provided with the packer working barrel (3), when the later stage needs to be operated under pressure to drill down, the packer is thrown into the well mouth from the well mouth, the packer is thrown to the position of the packer working barrel (3), the rubber sleeve of the packer is set, the internal blowout prevention function of the tubing is completed, and the operation function under pressure of the tubing string is realized.
10. The use method of the multifunctional integrated pipe column for gas injection, testing and operation under pressure as claimed in claim 9, wherein the method comprises the following steps: the soluble core (29) and the soluble ball (30) are both soluble materials, and the soluble materials can be completely dissolved under certain media, temperature and pressure.
CN202110034478.6A 2021-01-12 2021-01-12 Multifunctional integrated pipe column for gas injection, test and pressurized operation and use method Active CN112943109B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
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US4805699A (en) * 1986-06-23 1989-02-21 Baker Hughes Incorporated Method and apparatus for setting, unsetting, and retrieving a packer or bridge plug from a subterranean well
CN202970640U (en) * 2012-11-20 2013-06-05 中国石油化工股份有限公司 Reservoir protection tubular pillar of pressure self-adaptive anchoring packer
CN203081417U (en) * 2012-12-10 2013-07-24 中国石油天然气股份有限公司 Multifunctional integrated gas lift technique pipe column
CN103291285A (en) * 2013-06-04 2013-09-11 西南石油大学 Experimental apparatus and experimental method for simulating gas-well annulus pressure carrying and air cutting processes
CN203452663U (en) * 2013-08-30 2014-02-26 中国石油天然气股份有限公司 Production tubular column capable of being dismounted under pressure
CN106639994A (en) * 2017-01-06 2017-05-10 荆州市赛瑞能源技术有限公司 Oil pipe gas injection and water drainage technique and tools thereof
CN108457601A (en) * 2018-04-10 2018-08-28 山东普瑞思德石油技术有限公司 Gas-lift production one plows completion tubular column and technique

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4805699A (en) * 1986-06-23 1989-02-21 Baker Hughes Incorporated Method and apparatus for setting, unsetting, and retrieving a packer or bridge plug from a subterranean well
CN202970640U (en) * 2012-11-20 2013-06-05 中国石油化工股份有限公司 Reservoir protection tubular pillar of pressure self-adaptive anchoring packer
CN203081417U (en) * 2012-12-10 2013-07-24 中国石油天然气股份有限公司 Multifunctional integrated gas lift technique pipe column
CN103291285A (en) * 2013-06-04 2013-09-11 西南石油大学 Experimental apparatus and experimental method for simulating gas-well annulus pressure carrying and air cutting processes
CN203452663U (en) * 2013-08-30 2014-02-26 中国石油天然气股份有限公司 Production tubular column capable of being dismounted under pressure
CN106639994A (en) * 2017-01-06 2017-05-10 荆州市赛瑞能源技术有限公司 Oil pipe gas injection and water drainage technique and tools thereof
CN108457601A (en) * 2018-04-10 2018-08-28 山东普瑞思德石油技术有限公司 Gas-lift production one plows completion tubular column and technique

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