CN113513309B - Tieback type electric control shaft isolation intelligent well completion tool and working method - Google Patents
Tieback type electric control shaft isolation intelligent well completion tool and working method Download PDFInfo
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- CN113513309B CN113513309B CN202110940539.5A CN202110940539A CN113513309B CN 113513309 B CN113513309 B CN 113513309B CN 202110940539 A CN202110940539 A CN 202110940539A CN 113513309 B CN113513309 B CN 113513309B
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- 210000002445 nipple Anatomy 0.000 claims description 36
- 238000007789 sealing Methods 0.000 claims description 35
- 238000003860 storage Methods 0.000 claims description 20
- 238000009826 distribution Methods 0.000 claims description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 229910052802 copper Inorganic materials 0.000 claims description 10
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- 238000009413 insulation Methods 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 238000004873 anchoring Methods 0.000 claims description 9
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- 210000001503 joint Anatomy 0.000 claims description 6
- 239000002775 capsule Substances 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 239000010720 hydraulic oil Substances 0.000 claims description 3
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Classifications
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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
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means 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
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/023—Arrangements for connecting cables or wirelines to downhole devices
-
- 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
- E21B33/10—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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/16—Control means therefor being outside the borehole
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- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Remote Sensing (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a tieback type electric control shaft isolation intelligent well completion tool and a working method thereof. By adopting the scheme of the invention, tools and instruments in the expensive underground intelligent well completion main body system can still be reserved, so that temporary electrical separation can be formed between the tools and the upper cable, an operator is allowed to safely and simply replace oil pipes and problem cables under the condition of no well killing, and reestablishment of hydraulic and electrical connection with the underground intelligent well completion main body system is reestablished in the shortest time possible.
Description
Technical Field
The invention relates to the technical field of oil drilling and production downhole tools, in particular to an intelligent well completion tool for shaft isolation, which is mainly used for intelligent production and operation of oil and gas well shaft production or pumping, and particularly, but not limited to a method and a device for establishing downhole intelligent well completion control by utilizing a downhole wet electrode butt joint mode.
Background
For the purposes of fracturing acidizing simplified tubing string to reduce tripping operations, to prevent loss of low pressure well fluid, to control safety in snubbing operations, to open and close well testing, to marine storm valves, and the like, and for the purposes of collecting data from wells and reservoirs that are common to the petroleum industry, many wells are equipped with battery-powered permanent downhole tools, such as pressure, flow and temperature monitoring devices, based on the above-described requirements for data and control. Because the well bore environment is generally bad, the service life of the permanent type downhole instrument is limited, and especially the micro-electric instruments such as electrohydraulic control and the like often fail, and especially the electric quantity is lost too quickly. Such failures result in extremely careful and limited information obtained from the reservoir and limited wellbore fluid control capabilities. This can seriously affect knowledge and modeling of the reservoir, reducing reservoir recovery. Whether in a storage mode or a wireless transmission mode, the obtained data volume and timeliness cannot meet the purpose of fine oil reservoir development.
In addition, conventional typical installations often require production string power lines and communication cables to be run from the wellhead to the downhole monitoring and control system, which is typically secured to the production string using custom clamps. Installing the cable to the tubing string is a time consuming activity, delaying installation time. During installation and use of conventional downhole pressure and temperature sensors and the like, cables, clamps, joints, penetrations, connectors, etc. may be exposed to the well fluid and are a natural failure node. If damage occurs, the worst case is that the entire string length must be retrieved to replace the damaged cable. Other wellbore devices, such as multiphase flow meters, sand detectors, valves, throttles, circulation devices, etc., may also be installed as part of the permanent completion, in which case similar problems as described above may occur.
Depending on well conditions, the life expectancy of permanent downhole completion tools and equipment may vary from months to years, and statistically, 60% -80% of well failures in a wireline intelligent completion are due to non-downhole equipment and tools such as corrosion cracking, stress cracking, well junk operation failure, wellbore cleaning problems, etc., and once any cable-related problems have occurred, the whole well completion tool must be fully retrieved for re-completion, meaning that the production string and associated systems are replaced, which is a high operational risk and cost.
Disclosure of Invention
The invention aims to provide a tieback type electric control well bore isolation intelligent completion tool and a working method.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
an intelligent well completion tool capable of being connected in a tieback type electric control shaft isolation way comprises an insertion clamping anchoring seal with a wet joint, a sealing cylinder with the wet joint, a cable passing packer, an eccentric bunched type electrohydraulic control system nipple, a line concentration distribution nipple and a hydraulic control ball bottom valve;
the inserting, clamping and anchoring seal with the wet joint comprises a first upper joint and a first mandrel which are connected with each other, a through groove and a pawl are formed in the outer wall surface of the first upper joint, a first through hole parallel to the axial direction is formed in the wall surface of the first mandrel, a first isolating plug and a first electrode assembly are arranged at the upper part in the first through hole, a first spring is arranged on the outer wall of the middle part of the first mandrel, a plurality of balance holes communicated with the first through hole are further formed in the wall surface of the first mandrel, a capsule is arranged at the outer side of the balance holes, a first sliding cover is arranged below the first spring, and a first wet electrode assembly is arranged at the inner side of the first sliding cover; at least one sealing component is arranged on the wall surface of the lower part of the first mandrel;
the sealing cylinder with the wet joint comprises a second upper joint with a clamping groove with a left-handed thread, the second upper joint is connected with the sealing cylinder, a second through hole parallel to the axial direction is formed in the wall surface of the sealing cylinder, a second wet electrode assembly is arranged at the upper part in the second through hole, a second sliding cover is arranged at the inner side of the second wet electrode assembly, a second spring is arranged below the second sliding cover, and a second electrode assembly and a second isolation plug are arranged at the lower part in the second through hole;
the cable passing packer comprises a third upper joint, a second mandrel and a first lower joint which are connected with each other, a third through hole is formed in the wall surface of the second mandrel, the upper end of the third through hole is connected with a pressure test joint assembly, a steel pipe cable sealer is arranged at the upper part in the third through hole, and an upper slip, a rubber cylinder assembly, a lower slip, locking teeth and a setting piston are sequentially arranged on the second mandrel;
the short joint of the eccentric cluster type electrohydraulic control system comprises an eccentric tool body, wherein an instrument upper support and an instrument lower support are arranged on the eccentric tool body, and an electrohydraulic control instrument and sensor system is arranged between the instrument upper support and the instrument lower support;
the lower part of the short section of the eccentric cluster type electrohydraulic control system is provided with a line concentration distribution short section, the line concentration distribution short section comprises a pressure hoop in a cluster type clamping groove, a hydraulic control pipeline and a cable connector assembly are arranged in the pressure hoop, and the hydraulic control pipeline and the cable connector assembly are connected with a valve opening hydraulic control pipeline, a valve closing hydraulic control pipeline and a sensor cable;
the upper end of the hydraulic control ball bottom valve is provided with a fourth upper joint, the center of the fourth upper joint is provided with a fourth electrode assembly, a valve closing hydraulic control channel and a valve opening hydraulic control channel are arranged in the wall surface of the fourth upper joint, a position sensor cable is arranged in the wall surface of the hydraulic control ball bottom valve and connected with the position sensor, a lower oil cavity and a piston are arranged in the middle of the hydraulic control ball bottom valve, and an operating arm and a ball valve assembly are arranged at the lower part of the hydraulic control ball bottom valve.
The first wet electrode assembly comprises an electrode seat, a rubber sleeve, a copper electrode, an insulating sleeve, a rubber ring, a wet electrode ring, a fixing screw sleeve and an electrode jackscrew;
the components of the second wet electrode assembly are identical to the components of the first wet electrode assembly in composition, and the positions of the components are symmetrical in center.
The insulation sleeve is positioned on the inner side of the first sliding cover, at least one rubber ring is arranged on the outer surface of the insulation sleeve, a wet electrode ring and a fixing screw sleeve are further arranged on the insulation sleeve, an electrode jackscrew is arranged on the inner side of the fixing screw sleeve and positioned in an electrode seat, the electrode seat is embedded with the rubber sleeve, a copper electrode is arranged in the rubber sleeve, the inner side of the insulation sleeve is attached to the outer wall of the mandrel, and at least one sealing ring is arranged on the outer wall of the mandrel and in contact with the insulation sleeve.
Before entering the well, the insertion clamping anchoring seal with the wet joint is inserted into the sealing cylinder with the wet joint, the wet electrode rings in the first wet electrode assembly and the second wet electrode assembly are in electric butt joint, and electric current flowing from the first electrode assembly flows to the second electrode assembly through electric connection of the wet joint, so that electric connection of the two parts is realized;
the pawl with the left-handed thread and the clamping groove with the left-handed thread form clamping connection, and the pawl cannot be separated no matter lifting, lowering or right-handed; the clamping connection can be disconnected in a mode of lifting and adding a left-hand number of circles;
the sealing component is hydraulically sealed with the sealing cylinder; the first sliding cover upwards compresses the first spring to generate displacement, and the first wet electrode assembly is exposed; the second sliding cover downwards compresses the second spring to displace, exposes the second wet electrode assembly and is connected with the first wet electrode assembly in pairs, and electric connection is completed.
After the packer is pressed, the setting piston pushes the upper slips, the rubber cylinder assembly, the lower slips to be set and hung and set, the packer is sealed and anchored on the casing, and the locking teeth can lock the setting piston to keep the setting and hanging.
The hydraulic control instrument and sensor system comprises a sensor, a control circuit and a high-pressure pump instrument; the control circuit and the high-pressure pump instrument comprise an oil storage cylinder nipple, one end of the oil storage cylinder nipple is connected with an oil inlet pipe, the other end of the oil storage cylinder nipple is connected with an oil return pipe, the oil return pipe is connected with an electromagnetic control valve, a valve closing hydraulic control channel and a valve opening hydraulic control channel are arranged on the electromagnetic control valve, and the electromagnetic control valve is connected with the output end of the high-pressure pump;
the control circuit and the high-pressure pump instrument are also provided with a third electrode assembly, a modular underground main control circuit, a power distribution system and a modular underground high-pressure electric pump, and a filtering screen assembly is arranged between the modular underground high-pressure electric pump and the output end of the high-pressure pump.
Wherein, be equipped with a plurality of deep and shallow grooves on the wall surface that is arranged in the hydraulically controlled ball bottom valve and is opposite with the position sensor.
The working method of the tieback type electric control shaft isolation intelligent completion tool comprises the following steps:
the module type underground main control circuit controls the module type underground high-pressure electric pump and the electromagnetic control valve through the power distribution system according to the electric signal instruction of the wellhead, sucks hydraulic oil from the short joint of the oil storage cylinder through the oil inlet pipe, and outputs high-pressure oil for opening or closing the valve to the valve opening hydraulic control pipeline or the valve closing hydraulic control pipeline through the electromagnetic control valve from the output end of the high-pressure pump; and oil is returned to the short section oil return pipe of the oil storage cylinder through the electromagnetic control valve.
When the high-pressure hydraulic pressure from the output end of the high-pressure pump is conducted to the valve closing hydraulic control channel through the electromagnetic control valve, the high-pressure enters the oil feeding cavity, the piston is pushed to move downwards, the operating arm is driven, the ball valve assembly is driven by the operating arm to generate closing action, and the return oil of the lower oil cavity returns to the short joint of the oil storage cylinder through the electromagnetic control valve; the position sensor detects the deep and shallow grooves, transmits signals back to the module type underground main control circuit through the position sensor cable and identifies the signals to form an electrohydraulic control feedback loop; the position signal is timely sent to the wellhead through the module type underground main control circuit, and the ground can know that the ball valve is closed.
When the module type underground main control circuit receives a valve opening signal from a wellhead, the electromagnetic control valve is controlled to conduct high pressure to a valve opening hydraulic control channel, valve opening action is formed, and the position signal is uploaded in time.
Compared with the prior art, the invention has the outstanding effects that:
(1) When the permanent intelligent well completion and the matched monitoring system cable are failed or damaged and communication and control between the wellhead and the underground can not be established, the scheme of the invention can still keep expensive tools and instruments in the main system of the underground intelligent well completion, so that the tools and instruments can be electrically separated from the upper cable temporarily, an operator can safely and simply replace the oil pipe and the problem cable under the condition of no well killing, and the reconstruction of hydraulic and electric connection with the main system of the underground intelligent well completion can be reestablished in the shortest time possible.
(2) The invention uses the insert clamping anchoring seal with the wet joint to insert and clamp to the sealing cylinder (with the wet joint), thereby realizing the electric connection from the insert sealing to the sealing cylinder. And connecting the sealing cylinder with the cable passing packer, connecting the short section of the eccentric cluster type electrohydraulic control system with the cable passing packer, and connecting the hydraulic control ball bottom valve with the short section of the cluster type electrohydraulic control system to complete the tool string.
(3) Compared with the pressure wave or acoustic wave electromagnetic wave remote control technology powered by a battery, the electric control base valve with the tie-back function has the advantages of more abundant functions, better instrument stability, lower cost, longer underground service life, faster signal transmission rate, no influence of underground production technology, capability of collecting data and controlling the whole process, and capability of changing the production technology pipe column according to development requirements.
(4) The ball valve switch is not affected by sediment such as underground sand setting and the like, the construction cost is obviously reduced by using the single-core steel tube cable, faults such as short wires, short circuits and the like, which are easily caused by corrosion or collision of the cable in the cable direct connection process are avoided, and underground lines can be replaced at any time.
(5) The tool can be used for open hole completion and casing internal completion, can be used for rotary running operation, and can be used for deep well, multi-branch well and long horizontal section completion. After the ball valve is closed by electric control, the upper pipe column can be replaced without well killing; monitoring and transmitting the underground temperature and pressure in real time; monitoring and controlling underground production and liquid injection working conditions in real time; the intelligent well completion design is carried out according to the requirements of oil reservoir engineering, so that the temperature, pressure, production profile and the like of the oil reservoir are monitored in real time; selective exploitation is realized, and capacity is corrected and optimized in real time; the cable is in fault, the whole well pipe column and the underground system are not required to be replaced, the cost is reduced, and the productivity and the recovery ratio are improved; is especially suitable for storm well completion of the offshore floating platform.
The intelligent completion tool and the working method for the tieback type electric control shaft isolation are further described below with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a schematic front view in half section of an insert snap-in anchor seal with a wet joint;
FIG. 2 is an enlarged view of a portion of FIG. 1 at "A";
FIG. 3 is an enlarged view of a portion of FIG. 1 at "B";
FIG. 4 is a schematic front semi-sectional view of a seal cartridge with wet joint;
FIG. 5 is a schematic front view in half cross section of an insert snap anchor seal with wet nipple inserted into a seal cartridge;
FIG. 6 is a schematic diagram in front half section of a cable packer;
FIG. 7 is a schematic structural view of an eccentric cluster type electro-hydraulic control system nipple and a centralized distribution nipple;
FIG. 8 is another schematic structural view of an eccentric cluster type electro-hydraulic control system nipple and a centralized distribution nipple;
FIG. 9 is a schematic diagram of a hydraulically controlled ball-bottom valve;
FIG. 10 is an enlarged view of a portion of FIG. 9 at "E";
FIG. 11 is a schematic diagram of the hydraulic principle of solenoid valve control of an electric pump (1, 2, 3, 4, 5 in the figure are the expression modes of national standard hydraulic units (electromagnetic multi-position multi-channel valves), which are ports for hydraulic inflow or outflow);
FIG. 12 is an enlarged view of a portion of FIG. 4 at "C";
FIG. 13 is an enlarged view of a portion of FIG. 5 at "D"; .
Wherein, 101, a first upper joint, 102, a through groove, 103, a pawl, 104, a first mandrel, 105, a first isolation plug, 106, a first electrode assembly, 107, a first spring, 108, a balance hole, 109, a capsule, 110, a first sliding cover, 111, a first wet electrode assembly, 112, first through hole, 113, sealing component, 114, electrode holder, 115, rubber sleeve, 116, copper electrode, 117, insulating sleeve, 118, rubber ring, 119, wet electrode ring, 120, fixing screw sleeve, 121, electrode jackscrew, 122, sealing ring.
201. The device comprises a clamping groove, a second upper connector, a second wet electrode assembly, a second sliding cover, a second spring, a second through hole, a second electrode assembly, a second isolation plug, a sealing cylinder, a single-core steel pipe cable A and a single-core steel pipe cable B.
400. Control circuitry and high pressure pump equipment 401, eccentric tool body, 402, instrument upper support, 403, electro-hydraulic instrument and sensor system, 404, instrument lower support, 405, pressure collar, 406, hydraulic line and cable connector assembly, 407, open valve hydraulic line, 408, shut valve hydraulic line, 409, sensor cable, 411, third electrode assembly, 412, modular downhole master circuit, 413, distribution system, 414, modular downhole high pressure pump, 416, filter screen assembly, 417, single core transmission cable, 418, reservoir short, 419, return pipe, 420, high pressure pump output, 421.
501. The cable sealer comprises a steel pipe cable sealer, 502, a pressure test joint assembly, 503, a third through hole, 504, an upper slip, 505, a rubber cylinder assembly, 506, a lower slip, 507, locking teeth, 508, a setting piston, 509, a third upper joint, 510, a first lower joint, 511 and a second mandrel.
600. The hydraulic control ball valve 601, the fourth upper joint, 602, the closed valve hydraulic control channel, 603, the upper oil cavity, 604, the position sensor cable, 605, the lower oil cavity, 606, the operating arm, 607, the ball valve assembly, 609, the deep and shallow groove, 610, the position sensor, 611, the open valve hydraulic control channel, 612, the hydraulic channel, 613, the fourth electrode assembly, 630, the piston, 701, the electromagnetic control valve.
Detailed Description
1-13, a tieback-type electric control shaft isolation intelligent completion tool consists of an insertion clamping anchoring seal with a wet joint, a sealing cylinder with a wet joint, a cable passing packer, an eccentric cluster type electrohydraulic control system nipple, a hub distribution nipple and a hydraulic control ball bottom valve 600.
As shown in fig. 1-3, the insert-snap-anchor seal with a wet joint comprises a first upper joint 101 and a first mandrel 104 which are connected with each other, wherein a through groove 102 and a pawl 103 are arranged on the outer wall surface of the first upper joint 101, a first through hole 112 parallel to the axial direction is arranged in the wall surface of the first mandrel 104, a first isolating plug 105 and a first electrode assembly 106 are arranged at the upper part in the first through hole 112, a first spring 107 is arranged on the outer wall of the middle part of the first mandrel 104, a plurality of balance holes 108 communicated with the first through hole 112 are also arranged on the wall surface of the first mandrel 104, a capsule 109 is arranged at the outer side of the balance holes 108, a first sliding cover 110 is arranged below the first spring 107, and a first wet electrode assembly 111 is arranged at the inner side of the first sliding cover 110; at least one sealing component 113 is arranged on the wall surface of the lower part of the first mandrel 104; all of the spaces from the first electrode assembly 106 to the first through hole 112 are filled with insulating oil.
As shown in fig. 4 and 12, the sealing cylinder with the wet joint comprises a second upper joint 202 with a clamping groove 201 with a left-handed thread, the second upper joint 202 is connected with a sealing cylinder 209, a second through hole 206 parallel to the axial direction is arranged on the wall surface of the sealing cylinder 209, a second wet electrode assembly 203 is arranged at the upper part in the second through hole 206, a second sliding cover 204 is arranged at the inner side of the second wet electrode assembly 203, a second spring 205 is arranged below the second sliding cover 204, and a second electrode assembly 207 and a second isolation plug 208 are arranged at the lower part in the second through hole 206.
As shown in fig. 6, the cable passing packer comprises a third upper joint 509, a second mandrel 511 and a first lower joint 510 which are connected with each other, a third through hole 503 is formed in the wall surface of the second mandrel 511, the upper end of the third through hole 503 is connected with a pressure test joint assembly 502, a steel pipe cable sealer 501 is arranged at the upper part in the third through hole 503, and an upper slip 504, a rubber cylinder assembly 505, a lower slip 506, locking teeth 507 and a setting piston 508 are sequentially arranged on the second mandrel 511.
As shown in fig. 7-8 and 11, the short section of the eccentric cluster type electrohydraulic control system comprises an eccentric tool body 401, wherein an instrument upper support 402 and an instrument lower support 404 are arranged on the eccentric tool body 401, and an electrohydraulic control instrument and sensor system 403 is arranged between the instrument upper support 402 and the instrument lower support 404. In addition, multiple instrumentation and performance mechanism modules may be mounted according to different downhole process requirements, such as: the downhole sensors for various process requirements such as pressure/temperature/flow/water holdup, etc. are electrically or hydraulically connected to each other (specific implementation is not described here in detail).
The lower part of the eccentric cluster type electrohydraulic control system nipple is provided with a line concentration distribution nipple, the line concentration distribution nipple comprises a pressure hoop 405 in a cluster type clamping groove, a hydraulic control pipeline and cable connector assembly 406 is arranged in the pressure hoop 405, and the hydraulic control pipeline and cable connector assembly 406 is connected with a valve opening hydraulic control pipeline 407, a valve closing hydraulic control pipeline 408 and a sensor cable 409. The line concentration distribution nipple is mainly used for connecting a sensor connecting line of a lower tool back to a downhole main control circuit, connecting a high-pressure pump output hydraulic control pipe to the lower tool, and connecting a hydraulic control pipeline fed back by the lower tool back to a corresponding interface of the high-pressure pump output end 420 or the oil storage cylinder nipple 418 or the electromagnetic valve 701.
As shown in fig. 9-10, a fourth upper joint 601 is provided at the upper end of the hydraulic ball valve 600, a fourth electrode assembly 613 is provided at the center of the fourth upper joint 601, a valve closing hydraulic control channel 602 and a valve opening hydraulic control channel 611 are provided in the wall surface of the fourth upper joint 601, a position sensor cable 604 is provided in the wall surface of the hydraulic ball valve 600, the position sensor cable 604 is connected with the position sensor 610, a lower oil cavity 605 and a piston 630 are provided in the middle part of the hydraulic ball valve 600, and an operation arm 606 and a ball valve assembly 607 are provided in the lower part of the hydraulic ball valve 600. The ball valve is opened or closed through hydraulic control in different directions, so that the purpose of opening or closing the well is realized. The sensor cable 409 is electrically connected to the position sensor cable 604 via the fourth electrode assembly 613. The valve closing hydraulic control passage 602 and the upper oil chamber 603 are communicated with the hydraulic passage 612.
The first wet electrode assembly 111 includes an electrode holder 114, a rubber sleeve 115, a copper electrode 116, an insulating sleeve 117, a rubber ring 118, a wet electrode ring 119, a fixing screw sleeve 120, and an electrode top wire 121. The insulating sleeve 117 is positioned on the inner side of the first sliding cover 110, at least one rubber ring 118 is arranged on the outer surface of the insulating sleeve 117, a wet electrode ring 119 and a fixed screw sleeve 120 are further arranged on the insulating sleeve 117, an electrode jackscrew 121 is arranged on the inner side of the fixed screw sleeve 120, the electrode jackscrew 121 is positioned in an electrode seat 114, the electrode seat 114 is embedded with the rubber sleeve 115, a copper electrode 116 is arranged in the rubber sleeve 115, the inner side of the insulating sleeve 117 is attached to the outer wall of the mandrel 104, and at least one sealing ring 122 is arranged on the outer wall of the mandrel 104, which is in contact with the insulating sleeve 117.
The rubber sleeve 115 is vulcanized and bonded with the copper electrode 116 to form electrical insulation with the electrode holder 114. The insulating sleeve 117 is made of ceramic or PEEK material, and one function is to isolate the wet electrode ring 119 from the steel mandrel 104 to form an electrical insulation; another function is to isolate the well fluid from entering the through bore 112 along with the seal ring 122 to prevent leakage. The rubber ring 118 and the first sliding cover 110 together realize dust prevention of the wet electrode ring 119, and avoid corrosion and structure formation under the well and electrical connection failure caused by oil stains. The capsule 109 functions to balance the pressure of the insulating oil and annulus within the first through bore 112 through the balance bore 108.
The components of the second wet electrode assembly 203 are identical in composition to the first wet electrode assembly 111, and the positions of the components are center-symmetrical. The second electrode assembly 207 is identical in structure to the first electrode assembly 106.
As shown in fig. 5 and 13, before the well is run, the insert snap anchor seal with the wet joint is inserted into the seal cylinder with the wet joint, the wet electrode rings in the first wet electrode assembly 111 and the second wet electrode assembly 203 form electrical butt joint, and the current flowing from the first electrode assembly 106 flows to the second electrode assembly 207 through the electrical connection of the wet joint, thereby realizing the electrical connection of the two components;
the pawl 103 with the left-handed threads and the clamping groove 201 with the left-handed threads form clamping connection, and cannot be separated no matter lifting, lowering or right-handed; the clamping connection can be disconnected in a mode of lifting and adding a left-hand number of circles;
the seal assembly 113 forms a hydraulic seal with the seal cartridge 209; the first sliding cover 110 compresses the first spring 107 upwards to shift, exposing the first wet electrode assembly 111; the second sliding cover 204 compresses the second spring 205 downward to displace, exposing the second wet electrode assembly 203 and interfacing with the first wet electrode assembly 111, completing the electrical connection.
After the packer is set, the setting piston 508 pushes the upper slips 504, the packing assembly 505, the lower slips 506 up and down, seals and anchors them to the casing, and the locking teeth 507 lock the setting piston 508 to keep it set and set.
The hydraulic control instrument and sensor system 403 includes a sensor, control circuitry, and a high pressure pump instrument 400; the control circuit and the high-pressure pump instrument 400 comprise an oil storage cylinder nipple 418, one end of the oil storage cylinder nipple 418 is connected with an oil inlet pipe 421, the other end of the oil storage cylinder nipple 418 is connected with an oil return pipe 419, the oil return pipe 419 is connected with an electromagnetic control valve 701, a valve closing hydraulic control channel 602 and a valve opening hydraulic control channel 611 are arranged on the electromagnetic control valve 701, and the electromagnetic control valve 701 is connected with the output end 420 of the high-pressure pump;
the control circuit and the high-pressure pump instrument 400 are also provided with a third electrode assembly 411, a modular downhole master control circuit 412, a power distribution system 413 and a modular downhole high-pressure electric pump 414, and a filter screen assembly 416 is arranged between the modular downhole high-pressure electric pump 414 and the high-pressure pump output end 420. A single core transmission cable 417 is provided through the center of the control circuit and the high pressure pump apparatus 400.
The wall surface of the hydraulic control ball valve 600 opposite to the position sensor 610 is provided with a plurality of deep and shallow grooves 609.
The working method of the tieback type electric control shaft isolation intelligent completion tool comprises the following steps:
the module type underground main control circuit 412 controls the module type underground high-pressure electric pump 414 and the electromagnetic control valve 701 through the power distribution system 413 according to the electric signal instruction of the wellhead, sucks hydraulic oil from the oil storage cylinder nipple 418 through the oil inlet pipe 421, and outputs the high-pressure oil with the valve opened or closed to the valve opened hydraulic control pipeline 407 or the valve closed hydraulic control pipeline 408 through the electromagnetic control valve 701 from the high-pressure pump output end 420; and oil is returned to the oil return pipe 419 of the oil storage cylinder nipple 418 through the electromagnetic control valve 701.
When the high-pressure hydraulic pressure from the high-pressure pump output end 420 is conducted to the valve closing hydraulic control channel 602 through the electromagnetic control valve 701, the high-pressure enters the upper oil cavity 603, the piston 630 is pushed to move downwards, the operation arm 606 is driven, the ball valve assembly 607 is driven by the operation arm 606 to generate closing action, and the return oil of the lower oil cavity 605 returns to the oil storage cylinder nipple 418 through the electromagnetic control valve 701; the position sensor 610 detects the depth 609 and transmits the signal back to the modular downhole master circuit 412 via the position sensor cable 604 for identification, forming an electro-hydraulic feedback loop; the position signal is sent to the wellhead in time through the modular downhole master control circuit 412 and the surface can learn that the ball valve is closed.
When the module type downhole main control circuit 412 receives the valve opening signal from the wellhead, the electromagnetic control valve 701 is controlled to conduct high pressure to the valve opening hydraulic control channel 611, so as to form valve opening action, and the position signal is uploaded in time.
The tool is further described in connection with field operations as follows:
(1) The insert-snap-anchor seal with wet joint insert-snaps to the seal cartridge with wet joint, and electrical connection from the insert seal to the seal cartridge can be achieved.
(2) And connecting the sealing cylinder with the cable passing packer, connecting the eccentric cluster type electrohydraulic control system nipple with the cable passing packer, and connecting the hydraulic control ball bottom valve with the cluster type electrohydraulic control system nipple to complete the tool string.
The whole tool string is penetrated with a single-core steel tube cable, which comprises a single-core steel tube cable A301 arranged in the first through hole and a single-core steel tube cable B301 arranged in the second through hole. The single core steel tube cable a301 passes through the first electrode assembly 106 into the first through hole 112 with the wet end inserted into the snap-fit anchor seal interior, in other words, the first electrode assembly 106 has a length of wire within the first through hole 112 connected to the copper electrode 116. Further, an electrical connection is made to the second wet electrode assembly 203 through the wet electrode ring 119 and then routed through the second via 206 and the second electrode assembly 207. The second electrode assembly 207 is connected to a single-core steel tube cable B302.
Formed by a series of the above linkages: single core steel pipe cable A301-first electrode assembly 106-first through hole 112-copper electrode 116-wet electrode ring 119-second wet electrode assembly 203-second through hole 206-second electrode assembly 207-electrical connection to single core steel pipe cable B302.
(3) After all the well heads are connected, the electric connection can be tested on the ground through the switch of the electric control bottom ball valve.
(4) After the surface detection is completed, the tool is strung into the well (the ball valve can be in the open position, and positive circulation is built at any time) and reaches the appointed position in the well. Firstly, the ball valve is closed in an electric control mode, the oil pipe presses the setting hydraulic packer, the actions such as seal inspection and the like are completed (the downhole sensor can transmit signals to the wellhead at any time so as to facilitate wellhead recording and operation). Then, the ball valve is opened by electric control. Production is started (the production data in the well is transmitted to the wellhead at a high speed in real time and is transmitted to the general control center of the oil extraction plant through networking).
(5) The oil extraction factory general control center can switch the well operation by adopting a remote electric control mode at any time according to production requirements, the underground sensor can transmit signals such as temperature and pressure (including the closing recovery pressure of the lower part of the ball valve, and the like) to the well mouth at any time, the position of the ball valve switch is used for realizing the functions of power supply and data transmission by using a single-core cable, underground electric quantity is not required to be considered, and even the underground sensor signal can be transmitted in a high-frequency implementation manner in the fracturing process.
(6) When the pipe column needs to be replaced, the pipe column at the upper part of the packer sealing cylinder can be lifted out of the shaft (at the moment, the underground ball valve can be at the closed position to realize the snubbing operation function) only by reversely buckling, withdrawing, inserting and anchoring, separating the anchored wet joint from the sealing cylinder wet joint, and realizing the electric disconnection between the cable and the underground packer and between the cable and the bottom valve.
(7) After the string is replaced, the insert seal with wet joint is reinserted, the electrical connection between the surface and the bottom valve is reestablished, and the electrical control function of the well is restored.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (10)
1. An intelligent completion tool is kept apart to automatically controlled pit shaft of tieback formula, its characterized in that: the hydraulic control ball bottom valve comprises an inserting clamping anchoring seal with a wet joint, a sealing cylinder with the wet joint, a cable passing packer, an eccentric cluster type electrohydraulic control system nipple, a line concentration distribution nipple and a hydraulic control ball bottom valve (600);
the inserting, clamping and anchoring sealing device comprises a first upper joint (101) and a first mandrel (104) which are connected with each other, wherein a through groove (102) and a pawl (103) are formed in the outer wall surface of the first upper joint (101), a first through hole (112) parallel to the axial direction is formed in the wall surface of the first mandrel (104), a first isolating plug (105) and a first electrode assembly (106) are arranged at the upper part in the first through hole (112), a first spring (107) is arranged on the outer wall of the middle part of the first mandrel (104), a plurality of balance holes (108) communicated with the first through hole (112) are further formed in the wall surface of the first mandrel (104), a capsule (109) is arranged outside the balance holes (108), a first sliding cover (110) is arranged below the first spring (107), and a first wet electrode assembly (111) is arranged inside the first sliding cover (110); at least one sealing component (113) is arranged on the wall surface of the lower part of the first mandrel (104);
the sealing cylinder with the wet joint comprises a second upper joint (202) with a left-handed thread clamping groove (201), the second upper joint (202) is connected with a sealing cylinder (209), a second through hole (206) parallel to the axial direction is formed in the wall surface of the sealing cylinder (209), a second wet electrode assembly (203) is arranged at the upper part in the second through hole (206), a second sliding cover (204) is arranged at the inner side of the second wet electrode assembly (203), a second spring (205) is arranged below the second sliding cover (204), and a second electrode assembly (207) and a second isolating plug (208) are arranged at the lower part in the second through hole (206);
the cable passing packer comprises a third upper joint (509), a second mandrel (511) and a first lower joint (510) which are connected with each other, a third through hole (503) is formed in the wall surface of the second mandrel (511), the upper end of the third through hole (503) is connected with a pressure test joint assembly (502), a steel pipe cable sealer (501) is arranged at the upper part in the third through hole (503), and an upper slip (504), a rubber cylinder assembly (505), a lower slip (506), locking teeth (507) and a setting piston (508) are sequentially arranged on the second mandrel (511);
the short joint of the eccentric cluster type electrohydraulic control system comprises an eccentric tool body (401), wherein an instrument upper support (402) and an instrument lower support (404) are arranged on the eccentric tool body (401), and an electrohydraulic control instrument and sensor system (403) is arranged between the instrument upper support (402) and the instrument lower support (404);
a line concentration distribution nipple is arranged below the eccentric cluster type electrohydraulic control system nipple, the line concentration distribution nipple comprises a pressure hoop (405) in a cluster type clamping groove, a hydraulic control pipeline and cable connector assembly (406) is arranged in the pressure hoop (405), and the hydraulic control pipeline and cable connector assembly (406) is connected with a valve opening hydraulic control pipeline (407), a valve closing hydraulic control pipeline (408) and a sensor cable (409);
the upper end of the hydraulic control ball bottom valve (600) is provided with a fourth upper joint (601), the center of the fourth upper joint (601) is provided with a fourth electrode assembly (613), a valve closing hydraulic control channel (602) and a valve opening hydraulic control channel (611) are arranged in the wall surface of the fourth upper joint (601), a position sensor cable (604) is arranged in the wall surface of the hydraulic control ball bottom valve (600), the position sensor cable (604) is connected with a position sensor (610), the middle part of the hydraulic control ball bottom valve (600) is provided with a lower oil cavity (605) and a piston (630), and the lower part of the hydraulic control ball bottom valve (600) is provided with an operating arm (606) and a ball valve assembly (607).
2. The tieback-type electrically controlled wellbore isolation intelligent completion tool of claim 1, wherein: the first wet electrode assembly (111) comprises an electrode seat (114), a rubber sleeve (115), a copper electrode (116), an insulating sleeve (117), a rubber ring (118), a wet electrode ring (119), a fixed screw sleeve (120) and an electrode jackscrew (121);
the components of the second wet electrode assembly (203) are identical in composition to the first wet electrode assembly (111), and the positions of the components are in central symmetry.
3. The tieback-type electrically controlled wellbore isolation intelligent completion tool of claim 2, wherein: the insulation sleeve (117) is located the first sliding cover (110) is inboard, the surface of insulation sleeve (117) is equipped with at least one rubber circle (118), still be equipped with wet electrode ring (119) and fixed swivel nut (120) on insulation sleeve (117), the inboard of fixed swivel nut (120) is equipped with electrode jackscrew (121), and electrode jackscrew (121) are located electrode holder (114), and electrode holder (114) are in the same place with rubber cover (115) gomphosis, be equipped with copper electrode (116) in rubber cover (115), the inboard of insulation sleeve (117) with the outer wall of first dabber (104) is laminated mutually, on the outer wall of first dabber (104) with the position that insulation sleeve (117) contacted is equipped with at least one sealing washer (122).
4. The tieback-type electrically controlled wellbore isolation intelligent completion tool of claim 3, wherein: before entering the well, the insertion clamping anchoring seal with the wet joint is inserted into the sealing cylinder with the wet joint, the wet electrode rings in the first wet electrode assembly (111) and the second wet electrode assembly (203) form electric butt joint, and electric current flowing from the first electrode assembly (106) flows onto the second electrode assembly (207) through electric connection of the wet joint, so that electric connection of the two parts is realized;
the pawl (103) with the left-handed thread and the clamping groove (201) with the left-handed thread form clamping connection, and cannot be separated no matter lifting, lowering or right-handed; the clamping connection can be disconnected in a mode of lifting and adding a left-hand number of circles;
the sealing assembly (113) forms a hydraulic seal with the sealing cartridge (209); the first sliding cover (110) compresses the first spring (107) upwards to displace, and the first wet electrode assembly (111) is exposed; the second sliding cover (204) downwards compresses the second spring (205) to displace, and the second wet electrode assembly (203) is exposed and is in butt joint with the first wet electrode assembly (111) to complete electrical connection.
5. The tieback-type electrically controlled wellbore isolation intelligent completion tool of claim 1, wherein: after the cable packer is pressed, the setting piston (508) pushes the upper slip (504), the rubber cylinder assembly (505) and the lower slip (506) upwards to be set and set, so that the cable packer is sealed and anchored on a casing, and the locking teeth (507) can lock the setting piston (508) to keep the setting and the setting.
6. The tieback-type electrically controlled wellbore isolation intelligent completion tool of claim 1, wherein: the electrohydraulic control instrument and sensor system (403) comprises a sensor, a control circuit and a high-pressure pump instrument (400); the control circuit and the high-pressure pump instrument (400) comprise an oil storage cylinder nipple (418), one end of the oil storage cylinder nipple (418) is connected with an oil inlet pipe (421), the other end of the oil storage cylinder nipple is connected with an oil return pipe (419), the oil return pipe (419) is connected with an electromagnetic control valve (701), a valve closing hydraulic control channel (602) and a valve opening hydraulic control channel (611) are arranged on the electromagnetic control valve (701), and the electromagnetic control valve (701) is connected with the output end (420) of the high-pressure pump;
the control circuit and the high-pressure pump instrument (400) are also provided with a third electrode assembly (411), a modular underground main control circuit (412), a power distribution system (413) and a modular underground high-pressure electric pump (414), and a filtering screen assembly (416) is arranged between the modular underground high-pressure electric pump (414) and the output end (420) of the high-pressure pump.
7. The tieback-type electrically controlled wellbore isolation intelligent completion tool of claim 6, wherein: a plurality of deep and shallow grooves (609) are formed in the wall surface, opposite to the position sensor (610), of the hydraulic control ball bottom valve (600).
8. The method of operating a tieback electrically controlled wellbore isolated intelligent completion tool of claim 6 or 7, wherein: the module type underground main control circuit (412) controls the module type underground high-pressure electric pump (414) and the electromagnetic control valve (701) through the power distribution system (413) according to the electric signal instruction of the wellhead, sucks hydraulic oil from the oil storage cylinder nipple (418) through the oil inlet pipe (421), and outputs high-pressure oil of which the valve is opened or closed to the valve opening hydraulic control pipeline (407) or the valve closing hydraulic control pipeline (408) through the electromagnetic control valve (701) from the high-pressure pump output end (420); and oil return to an oil return pipe (419) of the oil storage cylinder nipple (418) is controlled by an electromagnetic control valve (701).
9. The method of operating a tieback electrically controlled wellbore isolated intelligent completion tool of claim 7, wherein: after the high-pressure hydraulic pressure from the output end (420) of the high-pressure pump is conducted to the valve closing hydraulic control channel (602) through the electromagnetic control valve (701), the high pressure enters the upper oil cavity (603), the piston (630) is pushed to move downwards, the operation arm (606) is driven, the operation arm (606) drives the ball valve assembly (607) to generate closing action, and the return oil of the lower oil cavity (605) returns to the oil storage cylinder nipple (418) through the electromagnetic control valve (701); the position sensor (610) detects the depth groove (609), and transmits a signal back to the modular underground main control circuit (412) through the position sensor cable (604) for identification, so as to form an electrohydraulic control feedback loop; the position signal is timely sent to the wellhead through a module type underground main control circuit (412), and the ground can know that the ball valve is closed.
10. The method of operating a tieback electrically controlled wellbore isolated intelligent completion tool of claim 6 or 7, wherein: when the module type underground main control circuit (412) receives a valve opening signal from a wellhead, the electromagnetic control valve (701) is controlled to conduct high pressure to a valve opening hydraulic control channel (611), so as to form valve opening action, and the position signal is uploaded in time.
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| CN202110940539.5A CN113513309B (en) | 2021-08-17 | 2021-08-17 | Tieback type electric control shaft isolation intelligent well completion tool and working method |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5732776A (en) * | 1995-02-09 | 1998-03-31 | Baker Hughes Incorporated | Downhole production well control system and method |
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| GB2433952B (en) * | 2004-05-21 | 2009-09-30 | Halliburton Energy Serv Inc | Methods and apparatus for using formation property data |
| US7836959B2 (en) * | 2006-03-30 | 2010-11-23 | Schlumberger Technology Corporation | Providing a sensor array |
| EP4219890A1 (en) * | 2016-01-16 | 2023-08-02 | Accessesp UK Limited | Low profile, pressure balanced, oil expansion compensated downhole electrical connector system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5732776A (en) * | 1995-02-09 | 1998-03-31 | Baker Hughes Incorporated | Downhole production well control system and method |
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