CN106593391B - Chemical deblocking compression type packer partial pressure pipe column and oil well fracturing method - Google Patents
Chemical deblocking compression type packer partial pressure pipe column and oil well fracturing method Download PDFInfo
- Publication number
- CN106593391B CN106593391B CN201611214767.XA CN201611214767A CN106593391B CN 106593391 B CN106593391 B CN 106593391B CN 201611214767 A CN201611214767 A CN 201611214767A CN 106593391 B CN106593391 B CN 106593391B
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- sealed compression
- lock ring
- packer
- piston
- solution sealed
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- 230000006835 compression Effects 0.000 title claims abstract description 202
- 238000007906 compression Methods 0.000 title claims abstract description 202
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000000126 substance Substances 0.000 title abstract description 8
- 239000003129 oil well Substances 0.000 title abstract description 6
- 239000004576 sand Substances 0.000 claims abstract description 55
- 238000007789 sealing Methods 0.000 claims description 113
- 238000012856 packing Methods 0.000 claims description 83
- 230000007704 transition Effects 0.000 claims description 68
- 241000239290 Araneae Species 0.000 claims description 39
- 230000000712 assembly Effects 0.000 claims description 15
- 238000000429 assembly Methods 0.000 claims description 15
- 238000004090 dissolution Methods 0.000 claims description 8
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 239000002195 soluble material Substances 0.000 claims description 5
- 210000000003 hoof Anatomy 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 3
- 230000000873 masking effect Effects 0.000 claims description 3
- 238000005488 sandblasting Methods 0.000 claims description 3
- 239000011800 void material Substances 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 claims description 2
- 238000003475 lamination Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 2
- 238000009434 installation Methods 0.000 abstract description 3
- 208000010392 Bone Fractures Diseases 0.000 abstract 1
- 206010010214 Compression fracture Diseases 0.000 abstract 1
- 206010017076 Fracture Diseases 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 210000002445 nipple Anatomy 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- 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
- E21B33/122—Multiple string packers
-
- 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
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention provides a chemical deblocking compression type packer partial pressure pipe column and an oil well fracturing method. This chemistry deblocking compression packer partial pressure tubular column includes plug, ball seat, differential sandblast sliding sleeve, two at least the same chemistry deblocking compression fracture packers and the bowling sandblast sliding sleeve, the chemistry deblocking compression slips fracture packer and the safety joint who matches with it, and fixed connection in proper order. The chemical deblocking compression type packer pressure-dividing pipe column adopts the connection of the chemical deblocking compression type fracturing packer and the chemical deblocking compression type slip fracturing packer, has the characteristics of simple structure and convenience in installation and construction operation, both the two chemical deblocking packers can be automatically deblocked without deblocking load, and after fracturing is completed, a packer rubber sleeve is dissolved or completely released, so that sand setting at the upper part of the rubber sleeve is reduced, and the safety of taking out the pipe column is greatly improved.
Description
Technical field
The invention belongs to oil field gas well fracturing technique field, be related to a kind of chemistry solution sealed compression packer partial pressure tubular column and
Wellfracturing method.
Background technique
In casing the transformation of packer staged fracturing be realize important technology that hyposmosis, fine and close oil-gas reservoir are effectively employed it
One, have fractured interval with strong points, the continuous feature of fracturing process.The refracturing of especially old well, packer in casing
Segmentation transformation is unique technological means.
Packer staged fracturing in casing, packer are the cores of the technology, to meet seal live, rise obtain want substantially
It asks.The main two major classes type of fracturing packer, first is that inflatable packer, another kind is compression packer.Country's housing at present
Packer staged fracturing renovation technique is less in managing, and discloses one kind application No. is 200720169453.2 patent application and above mentions
Tubing string packer staged fracturing technology, the technology are the fracturing strings formed based on inflatable packer, after one section of pressure, on
The problem of mentioning and press another section again, being primarily present be, each upper lifting pipe post will move well head, low efficiency, and risk is big；Publication No.
It with the fracturing string that compression packer forms is that mechanical isolation can be step by step that the patent application of CN202338316U, which discloses a kind of,
Five layers of layered fracturing technology pipe string of deblocking, for the technology after the completion of pressure break, upper lifting pipe post deblocking, the problem of being primarily present is deblocking
Difficulty, main cause be, when removing seal for packer wants several tons of load, and fracturing sand, which returns, when open flow spits, and sand can deposit on packing element, solve
Sealing load can be bigger, especially horizontal well, and the efficiency that well head load is transmitted to horizontal segment is lower, often results in removing seal for packer not
, tubing string rise do not come out.Influence the production even overhaul of oil/gas well.
Summary of the invention
In order to solve the technical issues of fracturing packer in the prior art is difficult to resolve envelope, the taking-up of tubing string difficulty, the purpose of the present invention
It is to provide a kind of chemistry solution sealed compression packer partial pressure tubular column and wellfracturing method.The chemistry solves sealed compression packer
Partial pressure tubular column is using connection chemistry solution sealed compression fracturing packer and chemistry solution sealed compression slips fracturing packer, two kinds of changes
Learning deblocking packer can unseal, automatically without deblocking load, greatly improve the safety of tubing string taking-up.
The purpose of the present invention is achieved by the following technical programs:
The present invention provides a kind of chemistry solution sealed compression packer partial pressure tubular column, which solves sealed compression packer partial pressure
Tubing string includes at least two identical chemistry solution sealed compression fracturing packers and matching pitching sand blast sliding sleeve, at least one
A chemistry solution sealed compression slips fracturing packer, differential sand blast sliding sleeve, safety joint, ball seat and silk plug；
The silk plug, the ball seat, the differential sand blast sliding sleeve, at least two identical chemistry solution sealed compression
Fracturing packer and matching pitching sand blast sliding sleeve, at least one described chemistry solution sealed compression slips fracturing packer and
The safety joint is fixedly connected sequentially.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, it is preferable that the chemistry solves sealed compression packer partial pressure
Tubing string includes the first chemistry solution sealed compression fracturing packer, the first pitching sand blast sliding sleeve, the second chemistry solution sealed compression pressure break
Packer, the second pitching sand blast sliding sleeve, chemistry solution sealed compression slips fracturing packer, differential sand blast sliding sleeve, safety joint,
Ball seat and silk plug；
The silk plug, the ball seat, the differential sand blast sliding sleeve, the first chemistry solution sealed compression pressure break packing
Device, the first pitching sand blast sliding sleeve, the second chemistry solution sealed compression fracturing packer, the second pitching sandblasting are sliding
Set, the chemistry solution sealed compression slips fracturing packer and the safety joint are fixedly connected sequentially.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, it is preferable that the chemistry solution sealed compression pressure break packing
Device includes: under the first top connection, vacuum cavity, component of giving up, the first central tube, the first transition joint, the first lock ring seat, first
Connector, solution big envelope, the first solution sealing joint, the first packing element component and first piston component；
First top connection is fixedly connected with the vacuum cavity, the vacuum cavity and the fixed company of component of giving up
It connects, the component of giving up is fixedly connected with first central tube, and first central tube is fixed with first transition joint
Connection, first transition joint are fixedly connected with the first lock ring seat, the first lock ring seat and first lower contact
It is fixedly connected；The first lock ring seat is the connector with tubular housing；
The solution big envelope, the first packing element component and the first deblocking connector are set in the outer of first central tube
It side and successively abuts against, the solution big envelope is fixedly connected with the component of giving up, the first solution sealing joint and described first living
Plug assembly abuts against；
The first piston component is set in first central tube, first transition joint and the first lock ring seat
Outside；The first piston component is fixedly connected with the first lock ring seat or first lower contact.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, it is preferable that the chemistry solution sealed compression pressure break packing
Device further includes sliding sleeve；
The cunning is set on the inner cavity of first top connection, the lateral wall of the sliding sleeve and first top connection
Internal chamber wall is fixedly connected by fixing piece and phase airtight connection, and in operation, fixing piece is cut, and the sliding sleeve is relative to described
First top connection slides axially；
The internal chamber wall of first top connection is arranged radially the through-hole duct being interlinked to the outside at least one, the through-hole hole
It is covered by the sliding sleeve in road；
It is further preferred that the through-hole duct is equally distributed three；
It is further preferred that the fixing piece is pin.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, it is preferable that the chemistry solution sealed compression pressure break packing
Device further includes sliding sleeve；
The cunning is set on the inner cavity of first top connection, the lateral wall of the sliding sleeve and first top connection
Internal chamber wall is flexibly connected, and the sliding sleeve slides axially relative to first top connection；
The vacuum cavity is made of chamber and tube wall, the tube wall of the vacuum cavity and the fixed company of first top connection
Connect and phase airtight connection, axially penetrate through one duct of setting in the tube wall of the vacuum cavity, the tube wall of the vacuum cavity it is upper
End and the lower end of first top connection are provided with gap, and the void openings direction is towards in pipe, and the gap is by the cunning
Set masking, the sliding sleeve and the inner sidewall phase airtight connection with the inner sidewall of first top connection and the vacuum cavity；
The upper end in the duct is connected with the gap, and the upper end in the duct is provided with a control rod, the control
Stick is the sealing end of the upper end in the duct.
Above-mentioned sealing end has referred to the sealing element of sealing process.
It is further preferred that the tube wall of the vacuum cavity is fixedly connected with first top connection by holding screw.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, it is preferable that the control rod is soluble material.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, it is preferable that the chemistry solution sealed compression pressure break packing
Device further includes sand control screens, and the opening in the gap is arranged in the sand control screens.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, it is preferable that the component of giving up includes releasing pup joint, loses
Hand connector, vacuum chamber cylinder, assembly piston and fishing sleeve；
The vacuum cavity is fixedly connected with the releasing pup joint and phase airtight connection；The releasing pup joint and the center
Pipe abuts against；
The back-off sub is set in the outside of the releasing pup joint and first central tube, under the back-off sub
The inner sidewall at end is fixedly connected with the lateral wall of the upper end of first central tube and phase airtight connection；The back-off sub it is upper
The inner sidewall at end is fixedly connected by closing piece with the lateral wall of the lower end of the releasing pup joint and phase airtight connection；
The vacuum chamber cylinder is set in the outside of the releasing pup joint and the back-off sub, the upper end of the vacuum chamber cylinder
Inner sidewall and the releasing pup joint lateral wall phase airtight connection, the vacuum chamber cylinder, the back-off sub and described give up
Pipe nipple three forms closed chamber；
The assembly piston is set in the outside of the back-off sub, the lower end of the vacuum chamber cylinder and the assembly piston
It abuts against；The upper end of the vacuum chamber cylinder and the lower end of the tube wall of the vacuum cavity abut against, the assembly piston with it is described
The lateral wall of back-off sub is fixedly connected and phase airtight connection；
The fishing sleeve is set in the outside of the vacuum cavity, the vacuum chamber cylinder and the assembly piston；It is described to beat
The inner sidewall for fishing out the upper end of set is shape of a hoof dentation, and is provided at least one pin on it, the lower end of the vacuum cavity
At least one keyway for matching with the pin of lateral wall setting, the pin being capable of the opposite sliding in the keyway；
The lateral wall phase airtight connection of the inner sidewall of the fishing sleeve and the lower end of the vacuum cavity；The inner sidewall of the fishing sleeve with
The lateral wall of the lateral wall of the vacuum chamber cylinder and the assembly piston distinguishes phase airtight connection；The lower end of the fishing sleeve and institute
The upper end for stating solution big envelope is fixedly connected；
It is further preferred that the quantity of the pin is uniformly distributed 5；The quantity of the keyway be and the pin phase
Matched uniformly distributed 5；
It is further preferred that the quantity of the closing piece is uniformly distributed 4.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, upper end and the vacuum cavity of the vacuum chamber cylinder
The lower end of tube wall abuts against, and fluid pressure is transmitted in operation in the duct in the tube wall of vacuum cavity, overstocks and pushes vacuum chamber cylinder
Upper end.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, the inner sidewall of the upper end of fishing sleeve is shape of a hoof dentation,
It can be convenient and above propose operation for cooperating fishing tool to be salvaged.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, it is preferable that the inner sidewall of the lower end of the back-off sub
It is fixedly connected by holding screw with the lateral wall of the upper end of first central tube.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, it is preferable that the assembly piston is cut by least one
Nail is fixedly connected with the lateral wall of the back-off sub；
It is further preferred that the quantity of the shear pin is uniformly distributed 4.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, it is preferable that packing element component includes main packing element, the first secondary glue
Cylinder, the second secondary packing element and rubber tube seat；
Described first secondary packing element, the main packing element, the second secondary packing element and the rubber tube seat are set in described first
The outside of heart pipe simultaneously successively abuts against；Described first secondary packing element is abutted against with the solution big envelope, the lower end of the solution big envelope and institute
State the lateral wall phase airtight connection of the first central tube, the lateral wall phase airtight connection of the rubber tube seat and first central tube is simultaneously
It is abutted against with the first solution sealing joint.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, it is preferable that the piston component includes first piston, the
Two pistons, the first lock ring set dowel bushing and set pin；
The first piston is set in the outside of first central tube and first transition joint, the second piston
It is set in the outside of first transition joint and the first lock ring seat；
The first piston is abutted against with the first solution sealing joint, the first piston and the fixed company of the second piston
It connects；
The lateral wall phase airtight connection of the inner sidewall of the upper end of the first piston and first central tube, described first
The lateral wall phase airtight connection of the internal chamber wall of piston and the upper end of first transition joint；
The lateral wall phase airtight connection of the inner sidewall of the upper end of the second piston and first transition joint, described
The lateral wall phase airtight connection of the internal chamber wall of two pistons and the upper end of the first lock ring seat；
The lateral wall of the first lock ring seat is laciniation, and first lock ring is set in the first lock ring seat
Outside and being provided in the inner sidewall of first lock ring matches with the laciniation of the lateral wall of the first lock ring seat
Laciniation, first lock ring unidirectionally slides relative to the first lock ring seat；
It is described set dowel bushing be set in the first lock ring seat lower end lateral wall or first lower contact it is outer
Side wall is simultaneously set pin and is fixedly connected by described；
The second piston is set in the outer of first transition joint, the first lock ring seat and first lock ring
Side, the inner sidewall of the lower end of the second piston are provided with a protrusion, and first lock ring abuts against with the protrusion, and described the
One lock ring is abutted against with the dowel bushing that sets, and the lower end of the second piston is mutually connected with the upper end for setting dowel bushing；
It is further preferred that the quantity for setting pin is uniformly distributed 4.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, it is preferable that the material of the first solution sealing joint is magnesium
Alloy material.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, it is preferable that the chemistry solution sealed compression slips pressure break
Packer includes: chemistry solution sealed compression slips fracturing packer including indirect in the second top connection, the second central tube, second
Head, slip assemblies, the second packing element component, the second solution sealing joint, second piston component and the second lower contact；
Second top connection is fixedly connected (threaded connection, clamping, welding etc.) with second central tube, and described second
Central tube be fixedly connected with second transition joint (be threadedly coupled, clamping, welding etc.), second transition joint with it is described
Second lower contact is fixedly connected with (threaded connection, clamping, welding etc.)；
The slip assemblies, the second packing element component and the second deblocking connector are set in outside second central tube
Side, the slip assemblies, the second packing element component, the second solution sealing joint and the second piston component successively offset
It connects, the slip assemblies are abutted against with second top connection；
The second piston component is set in second central tube, second transition joint and second lower contact
Outside, the upper end of the second piston component and the second central tube phase airtight connection, under the second piston component
End and the second lower contact phase airtight connection.
It is above-mentioned chemistry solution sealed compression packer partial pressure tubular column in, it is preferable that the slip assemblies include slips, leaf spring and
Slip spider；
The slips is set in the outside of second central tube, and the leaf spring is set in the outside of the slips, described
Slip spider is set in the outside of second central tube and is fixedly connected with second central tube；
The upper and lower side of the slips is wedge shape, and the lower end of second top connection matches with the slips upper end
Wedge shape, the upper end of the slips are abutted against with second top connection；
The upper end of the slip spider is the wedge shape to match with the lower end of the slips, the lower end of the slips and the card
Watt seat abuts against.In operation process, the slips is opposite with second top connection to be slided, the slips and the slip spider
Opposite sliding, so that slips expansion or retraction.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, it is preferable that the slip spider passes through shear pin and described the
The lateral wall of two central tubes is fixedly connected；
It is further preferred that the quantity of the shear pin is at least four and is uniformly distributed.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, it is preferable that the slip assemblies further include guard housing；It is described
Guard housing is set in the outside of the leaf spring, the lateral wall of the inner sidewall of the upper end of the guard housing and the lower end of second top connection
Be fixedly connected (be threadedly coupled, be clamped, weld etc.), the outside of the upper end of the inner sidewall of the lower end of the guard housing and the slip spider
Wall is mutually connected.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, it is preferable that the slip assemblies further include slips seated connection
Head；The slip spider connector is set in the outside of second central tube, the slip spider connector setting the slip spider with
Between the second packing element component, the slip spider connector is fixedly connected with the slip spider (to be threadedly coupled, clamping, welding
Deng), the slip spider connector is abutted against with the second packing element component.
It is above-mentioned chemistry solution sealed compression packer partial pressure tubular column in, it is preferable that the second packing element component include packing element, on
Rubber tube seat and lower rubber cylinder seat；
The packing element, the upper rubber tube seat and the lower rubber cylinder cover for seat are located at the outside of second central tube, it is described on
Rubber tube seat, the packing element and the lower rubber cylinder seat successively abut against, and the upper rubber tube seat passes through sealing ring and second center
The lateral wall phase airtight connection of pipe is simultaneously abutted against with the slip assemblies, and the lower rubber cylinder seat passes through in sealing ring and described second
The lateral wall phase airtight connection of heart pipe is simultaneously abutted against with the second solution sealing joint.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, it is preferable that the piston component includes third piston, the
Two lock rings, the second lock ring seat, lock ring set and the 4th piston；
The third piston is set in the outside of second central tube and second transition joint, the upper end with it is described
Second solution sealing joint abuts against；4th piston is set in the outside of second transition joint and second lower contact；
The inner sidewall of the upper end of the third piston passes through the mutually closed company of lateral wall of sealing ring and second central tube
It connects, the internal chamber wall of the third piston passes through the lateral wall phase airtight connection of sealing ring and the upper end of second transition joint；
Form a closed chamber formed by third piston, the second central tube and the second transition joint three, closed chamber setting
There is inlet, injecting gas or liquid by inlet makes closed chamber generate pressure；
Second lock ring, the second lock ring seat and the lock ring set are set in the outside of second transition joint,
The second lock ring seat is fixedly connected with second transition joint, and the lateral wall on second transition joint top is provided with one
Protrusion, second lock ring are arranged in the lower end of the protrusion and abut against in operation Shi Yuqi, and second lock ring lower end is set
It is equipped with the second lock ring seat, second lock ring is abutted against with the second lock ring seat；
The upper end of the lock ring set is fixedly connected with the inner sidewall of the lower end of the third piston (to be threadedly coupled, clamping, weldering
It connects)；The lower end of the lock ring set is fixedly connected with the lateral wall of the upper end of the 4th piston (to be threadedly coupled, clamping, welding
Deng)；The inner sidewall of the upper end of 4th piston passes through the lateral wall phase airtight connection of sealing ring and second transition joint,
The internal chamber wall of 4th piston passes through the lateral wall phase airtight connection of sealing ring and the upper end of second lower contact；Described
The lower end of four pistons is fixedly connected with second lower contact；One is formed by under the 4th piston, the second transition joint and second
The closed chamber that connector three is formed, the closed chamber are provided with inlet, and injecting gas or liquid by inlet makes to close
Chamber generates pressure；
The inner sidewall of the lock ring set is laciniation；The lateral wall of second lock ring is provided with and the lock ring set
Inner sidewall the laciniation that matches of laciniation；The lock ring set is unidirectionally slided relative to second lock ring.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, it is preferable that the lower end of the 4th piston passes through shear pin
It is fixedly connected with second lower contact；
It is further preferred that the quantity of the shear pin is at least four and is uniformly distributed.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, it is preferable that second lock ring is nicked annular
Structure and lower end are wedge shape, and the upper end of the second lock ring seat is the wedge shape to match with the lower end of second lock ring, described
Second lock ring is abutted against with the second lock ring seat.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, it is preferable that the second lock ring seat passes through shear pin and institute
The second transition joint is stated to be fixedly connected；
It is further preferred that the quantity of the shear pin is at least four and is uniformly distributed.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, it is preferable that the inside of the lower end of second top connection
Wall is threadably secured with the lateral wall of the upper end of second central tube to be connect and adds sealing ring sealing in threaded connection place.
In above-mentioned chemistry solution sealed compression packer partial pressure tubular column, it is preferable that the material of the second solution sealing joint is magnesium
Alloy material or other soluble materials.
" airtight connection " that the present invention is previously mentioned can be by sealing ring, can also be using hermetic units such as oil sealings.
The present invention also provides a kind of wellfracturing methods comprising following steps:
Step 1 sets any one of the claim 1-20 chemistry solution sealed compression packer partial pressure tubular column connected pipes
It in underground, is then suppressed into oil pipe, and sets chemistry solution sealed compression fracturing packer and chemistry solution sealed compression slips pressure
Split packer；
Step 2 continues to suppress into oil pipe, opens differential sand blast sliding sleeve, carries out first layer pressure break, when the first lamination
After splitting, well head pitching, ball is fallen on the pitching sand blast sliding sleeve of the second layer, and the pitching sand blast sliding sleeve of the second layer is opened, into
Row second layer pressure break；
Step 3 puts into the ball of different-diameter in each layer according to the sequence that the diameter of ball is ascending, according to each layer
Sequence successively opens the pitching sand blast sliding sleeve of each layer from bottom to top, carries out the pressure break of each layer；
Step 4, after pressure break, mouth of shunting in a well, to chemistry solution sealed compression fracturing packer and chemistry solution sealed compression card
After solution sealing joint dissolution in watt fracturing packer, chemistry solution sealed compression fracturing packer and chemistry solution sealed compression slips pressure
It splits packer to unseal automatically, carries out well head open flow, chemistry solution sealed compression packer partial pressure tubular column is taken out into well head.
In above-mentioned wellfracturing method, it is preferable that in step 4, the chemistry solution sealed compression fracturing packer and institute
It states chemistry solution sealed compression slips fracturing packer and cooperate while each self-unsealing connector unseals automatically and manual above propose deblocking.
In above-mentioned wellfracturing method, the concrete operations for setting and unsealing of the chemistry solution sealed compression fracturing packer
Are as follows:
It sets: chemistry solution sealed compression fracturing packer is connected to chemistry solution sealed compression packer partial pressure of the invention
In tubing string, and connected pipes are placed in underground, carry out suppressing operation to oil pipe, highly pressurised liquid enters first piston group by inlet
In the inner cavity of part, first piston component is pushed to move upwards, and then the compression of the first packing element component is pushed to be radially expanded, meanwhile, the
The first lock ring in one piston component moves upwards and is engaged fixation with the first lock ring seat, and the first packing element component is prevented to spring back, and completes
Chemistry solution sealed compression fracturing packer is set；
Deblocking: after the completion of pressure break, above mention deblocking give up component (above proposing deblocking manually) and/or dissolution first solve sealing joint,
Complete deblocking.
In above-mentioned wellfracturing method, setting and unsealing for the chemistry solution sealed compression slips fracturing packer is specific
Operation are as follows:
It sets: chemistry solution sealed compression slips fracturing packer is connected to chemistry solution sealed compression packer of the invention
In partial pressure tubular column, and connect it is related be placed in underground, oil pipe is carried out to suppress operation, liquid enters the inside of second piston component,
It pushes second piston component moved axially upward along central tube, and then pushes the compression of the second packing element component, when second piston group
When part internal pressure reaches setting value (according to what is obtained after actual test), the decrement of the second packing element component reaches design requirement, this
When second piston component mutually fixed with the second central tube and the second transition joint；The compression of second packing element component pushes slip assemblies
Radial direction struts, and completes to set while the second packing element component and slip assemblies；
Deblocking: after the completion of pressure break, deblocking second piston component (above proposing deblocking manually) and/or dissolution the second solution sealing-in are above proposed
Head completes deblocking.
Chemistry solution sealed compression packer partial pressure tubular column provided by the invention is using connection chemistry solution sealed compression pressure break envelope
Every device and chemistry solution sealed compression slips fracturing packer, have the characteristics that structure is simple, installation is convenient with constructing operation, two kinds
Chemical deblocking packer can unseal automatically, without deblocking load, after the completion of pressure break, packing element dissolution or discharge completely,
The sand setting for reducing packing element top greatly improves the safety of tubing string taking-up.
Detailed description of the invention
Fig. 1 is that chemistry solution sealed compression packer divides the signal before not setting in pipe tripping in oil well in the embodiment of the present invention
Figure；
Fig. 2 is the partial cutaway schematic of the chemistry solution sealed compression fracturing packer in the embodiment of the present invention；
Fig. 3 is the partial cutaway schematic of the chemistry solution sealed compression slips fracturing packer in the embodiment of the present invention；
Fig. 4 is that chemistry solution sealed compression packer divides progress pressure break first layer in pipe tripping in oil well in the embodiment of the present invention
Schematic diagram；
Fig. 5 is that chemistry solution sealed compression packer divides the progress pressure break second layer in pipe tripping in oil well in the embodiment of the present invention
Schematic diagram；
Fig. 6 is that chemistry solution sealed compression packer divides progress pressure break third layer in pipe tripping in oil well in the embodiment of the present invention
Schematic diagram；
Accompanying drawings symbol description:
101 silk plugs, 102 ball seats, 103 differential sand blast sliding sleeves, 104 first chemistry solution sealed compression fracturing packers, 105
First pitching sand blast sliding sleeve, 106 second chemistry solution sealed compression fracturing packers, 107 second pitching sand blast sliding sleeves, 108 chemistry
Solve sealed compression slips fracturing packer, 109 safety joints, 110 oil pipes；
A1 top connection, A2 vacuum cavity, A3 central tube, A4 transition joint, A5 lock ring seat, A6 lower contact, A7 solve big envelope, A8
Solve sealing joint, A9 sliding sleeve, A10 control rod, A11 sand control screens, A12 releasing pup joint, A13 back-off sub, A14 vacuum chamber cylinder, A15 dress
With piston, A16 fishing sleeve, the main packing element of A17, the secondary packing element of A18 first, the secondary packing element of A19 second, A20 rubber tube seat, A21 first piston,
A22 second piston, A23 lock ring, A24 set dowel bushing, and A25 sets pin, A26 sealing ring, A27 through-hole duct, A28 sealing
Circle, the duct A29, A30 sealing ring, A31 sealing ring, A32 sealing ring, A33 holding screw, A34 pin, A35 sealing ring, A36 are close
Seal, A37 sealing ring, A38 sealing ring, A39 closing piece, A40 sealing ring, A41 sealing ring, A42 sealing ring, A43 shear pin, A44 are close
Seal, A45 holding screw, A46 sealing ring, A47 sealing ring, A48 sealing ring, A49 sealing ring, A50 sealing ring, A51 sealing ring,
A52 sealing ring, A53 pin；
B1 top connection, B2 central tube, B3 transition joint, B4 slips, B5 leaf spring, B6 guard housing, B7 slip spider, B8 slips seated connection
Head, B9 packing element, the upper rubber tube seat of B10, B11 lower rubber cylinder seat, B12 solution sealing joint, B13 first piston, B14 lock ring, B15 lock ring seat,
B16 lock ring set, B17 second piston, B18 lower contact, B19 sealing ring, B20 shear pin, B21 sealing ring, B22 sealing ring, B23 sealing
Circle, B24 sealing ring, B25 shear pin, B26 sealing ring, B27 sealing ring, B28 shear pin.
Specific embodiment
In order to which technical characteristic of the invention, purpose and beneficial effect are more clearly understood, now to skill of the invention
Art scheme carries out described further below, but should not be understood as that limiting the scope of the invention.
Embodiment
The present embodiment provides a kind of chemistry solution sealed compression packer partial pressure tubular columns, as shown in Figure 1, chemistry deblocking compression
Formula packer partial pressure tubular column includes that the first chemistry solves sealed compression fracturing packer 104, the first pitching sand blast sliding sleeve 105, second
Chemistry solution sealed compression fracturing packer 106, the second pitching sand blast sliding sleeve 107, chemistry solution sealed compression slips fracturing packer
108, differential sand blast sliding sleeve 103, safety joint 109, ball seat 102 and silk plug 101；
Silk plug 101, ball seat 102, the chemistry solution of differential sand blast sliding sleeve 103, first sealed compression fracturing packer 104, the
One pitching sand blast sliding sleeve the 105, second chemistry solution sealed compression fracturing packer 106, the second pitching sand blast sliding sleeve 107, chemistry solution
Sealed compression slips fracturing packer 108 and safety joint 109 are fixedly connected sequentially from bottom to up.
Above-mentioned first chemistry solution sealed compression fracturing packer 104 and the second chemistry solution sealed compression fracturing packer 106
Sealed compression fracturing packer is solved for identical chemistry, as shown in Fig. 2, the structure group of chemistry solution sealed compression fracturing packer
At including top connection A1, vacuum cavity A2, central tube A3, transition joint A4, lock ring seat A5, lower contact A6, solution big envelope A7, deblocking
Connector A8, sand control screens A11, component of giving up, packing element component and piston component.
The component of giving up includes releasing pup joint A12, back-off sub A13, vacuum chamber cylinder A14, assembly piston A15 and salvaging
Cover A16；The packing element component includes main packing element A17, the first secondary packing element A18, the second pair packing element A19 and rubber tube seat A20；The work
Plug assembly includes first piston A21, second piston A22, lock ring A23, sets dowel bushing A24 and set pin A25.
The inner cavity of top connection A1 is arranged in sliding sleeve A9, and the lateral wall of sliding sleeve A9 and the internal chamber wall of top connection A1 pass through pin
A53 is fixedly connected with and passes through sealing ring A26 and sealing ring A30 airtight connection, and sliding sleeve A9 slides axially relative to top connection A1；On
The internal chamber wall of connector A1 is arranged radially there are three the interior through-hole duct A27 being interlinked to the outside, and when setting, through-hole duct A27 is by sliding sleeve A9
It is covered, the inner sidewall of the inner sidewall and vacuum cavity A2 of sliding sleeve A9 and top connection A1 passes through sealing ring A30 and sealing ring A31
Phase airtight connection；When pressure break, sliding sleeve A9 is hit down, is interlinked to the outside in the A27 of through-hole duct and is carried out pressure break.
Vacuum cavity A2 is made of chamber and tube wall, and the tube wall of the vacuum cavity A2 passes through holding screw A33 and above connects
Head A1 is fixedly connected with and passes through sealing ring A32, and a duct A29 is axially arranged in the tube wall of vacuum cavity A2, vacuum cavity A2's
The upper end of tube wall and the lower end of top connection A1 are provided with gap, and the void openings direction is towards in pipe, and the gap is by sliding sleeve
A9 masking, sliding sleeve A9 and the gap constitute sealed chamber；The upper end of duct A29 is connected with the gap, and duct A29's is upper
End is provided with a control rod A10, and the upper end of control rod A10 and duct A9 passes through sealing ring A28 phase airtight connection；Control rod A10
For soluble material；The opening in the gap is arranged in sand control screens A11.
Vacuum cavity A2 is threadably secured with releasing pup joint A12 to be connect and by sealing ring A35 phase airtight connection；It gives up
Pipe nipple A12 is abutted against with central tube A3；Back-off sub A13 is set in the outside of releasing pup joint A12 and central tube A3, back-off sub
The inner sidewall of the lower end of A13 is fixedly connected by holding screw A45 with the lateral wall of the upper end of central tube A3 and passes through sealing ring
A44 phase airtight connection；The inner sidewall of the upper end of back-off sub A13 passes through uniformly distributed four closing piece A39 and releasing pup joint A12
The lateral wall of lower end be fixedly connected and pass through sealing ring A42 phase airtight connection；Vacuum chamber cylinder A14 is set in releasing pup joint A12
With the outside of back-off sub A13, the inner sidewall of the upper end of vacuum chamber cylinder A14 and the lateral wall of releasing pup joint A12 pass through sealing ring
A38 phase airtight connection, vacuum chamber cylinder A14, back-off sub A13 and releasing pup joint A12 three form closed chamber；Assemble piston
A15 is set in the outside of back-off sub A13, and lower end and the assembly piston A15 of vacuum chamber cylinder A14 is abutted against；Vacuum chamber cylinder A14's
Upper end and the lower end of the tube wall of vacuum cavity A2 abut against, and the lateral wall of assembly piston A15 and back-off sub A13 pass through uniform cloth
If four shear pin A43 be fixedly connected and pass through sealing ring A41 phase airtight connection；Fishing sleeve A16 is set in vacuum cavity A2, true
The outside of cavity cylinder A14 and assembly piston A15；The inner sidewall of the upper end of fishing sleeve A16 is shape of a hoof dentation, and on it uniformly
There are five five keyways that pin A34, the lateral wall setting of the lower end of vacuum cavity A2 match with pin A34, pins for setting
A34 being capable of the opposite sliding in the keyway；The inner sidewall of fishing sleeve A16 and the lateral wall of the lower end of vacuum cavity A2 pass through close
Seal A36 phase airtight connection；The inner sidewall of fishing sleeve A16 and the lateral wall of vacuum chamber cylinder A14 and the lateral wall for assembling piston A15
Pass through sealing ring A37 and sealing ring A40 phase airtight connection respectively；The lower end of fishing sleeve A16 and the upper end of solution big envelope A7 pass through spiral shell
Line is fixedly connected.
First secondary packing element A18, main packing element A17, the second pair packing element A19 and rubber tube seat A20 are set in the outer of central tube A3
Side simultaneously successively abuts against；First pair packing element A18 is abutted against with solution big envelope A7, solves the lower end of big envelope A7 and the lateral wall of central tube A3
By sealing ring A46 phase airtight connection, the lateral wall of rubber tube seat A20 and central tube A3 passes through sealing ring A47 phase airtight connection simultaneously
It is abutted against with solution sealing joint A8.
Central tube A3 and transition joint A4 are threadably secured connection；Transition joint A4 and lock ring seat A5 are threadably secured
Connection；Lock ring seat A5 is threadably secured with lower contact A6 to be connect and by sealing ring A52 phase airtight connection；First piston A21
It is set in the outside of central tube A3 and transition joint A4, second piston A22 is set in the outside of transition joint A4 and lock ring seat A5；
First piston A21 is abutted against with solution sealing joint A8, and first piston A21 is threadably secured with second piston A22 and connect；First is living
The inner sidewall of the upper end of A21 and the lateral wall of central tube A3 are filled in by sealing ring A48 phase airtight connection, and first piston A21's is interior
Cavity wall and the lateral wall of the upper end of transition joint A4 pass through sealing ring A49 phase airtight connection；Formed one by first piston A21,
The closed chamber that central tube A3 and transition joint A4 three are formed, the closed chamber are provided with inlet, are injected by inlet
Gas or liquid make closed chamber generate pressure；The inner sidewall of the upper end of second piston A22 and the lateral wall of transition joint A4 are logical
Sealing ring A50 phase airtight connection is crossed, the lateral wall of the upper end of the internal chamber wall and lock ring seat A5 of second piston A22 passes through sealing ring
A51 phase airtight connection；A closed chamber formed by second piston A22, transition joint A4 and lock ring seat A5 three is formed, it should
Closed chamber is provided with inlet, and injecting gas or liquid by inlet makes closed chamber generate pressure；Lock ring seat A5's is outer
Side wall is laciniation, and lock ring A23 is set in the outside of lock ring seat A5 and is provided with and lock ring seat in the inner sidewall of lock ring A23
The laciniation that the laciniation of the lateral wall of A5 matches, lock ring A23 are unidirectionally slided relative to lock ring seat A5；Set pin
Nail seat A24 is set in the lateral wall of the upper end of lower contact A6 and sets pin A25 by uniformly distributed four and is fixedly connected；The
Two piston A22 are set in the outside of transition joint A4, lock ring seat A5 and lock ring A23, and the inner sidewall of the lower end of second piston A22 is set
It is equipped with a protrusion, lock ring A23 is abutted against with the protrusion, and lock ring A23 is abutted against with dowel bushing A24 is set, second piston A22's
Lower end is mutually connected with the upper end for setting dowel bushing A24；When setting, second piston A22 drive sets dowel bushing A24 and moves up, and makes
Setting dowel bushing A24 drives lock ring A23 to move up together.The material for solving sealing joint A8 is magnesium alloy material.
As shown in figure 3, it is above-mentioned chemistry solution sealed compression slips fracturing packer 108 structure composition include top connection B1,
Central tube B2, transition joint B3, slips B4, leaf spring B5, guard housing B6, slip spider B7, slip spider connector B8, packing element B9, upper packing element
Seat B10, lower rubber cylinder seat B11, solution sealing joint B12, third piston B13, lock ring B14, lock ring seat B15, lock ring set B16, the 4th live
Fill in B17 and lower contact B18.
The inner sidewall of the lower end of top connection B1 is threadably secured with the lateral wall of the upper end of central tube B2 and connect, central tube
The lateral wall of the lower end of B2 is threadably secured with the inner sidewall of the upper end of transition joint B3 to be connect and adds in threaded connection place
Sealing ring B19 sealing, the inner sidewall of the upper end of the lateral wall and lower contact B18 of the lower end of transition joint B3 are threadably secured company
It connects.
Slips B4 is set in the outside of central tube B2, and leaf spring B5 is set in the outside of slips B4, during slip spider B7 is set in
The outside of heart pipe B2 is simultaneously fixed by 4 shear pin B20 being evenly distributed with central tube B2 phase；The upper and lower side of slips B4 is wedge
The lower end of shape, top connection B1 is the wedge shape to match with the upper end slips B4, and upper end and the top connection B1 of slips B4 is abutted against；Slips
The upper end of seat B7 is the wedge shape to match with the lower end of slips B4, and lower end and the slip spider B7 of slips B4 is abutted against；Guard housing B6 set
It is located at the outside of leaf spring B5, the inner sidewall of the upper end of guard housing B6 is fixedly connected with the lateral wall of the lower end of top connection B1, guard housing B6
The inner sidewall of lower end be mutually connected with the lateral wall of the upper end of slip spider B7.Slip spider connector B8 is set in the outer of central tube B2
Side, slip spider connector B8 are arranged between slip spider B7 and upper rubber tube seat B10, and slip spider connector B8 and slip spider B7 pass through screw thread
It is fixedly connected, slip spider connector B8 is abutted against with upper rubber tube seat B10.
Packing element B9, upper rubber tube seat B10 and lower rubber cylinder seat B11 are set in the outside of central tube B2, upper rubber tube seat B10, glue
Cylinder B9 and lower rubber cylinder seat B11 is successively abutted against, and upper rubber tube seat B10 is mutually closed by sealing ring B21 and the lateral wall of central tube B2
Connection, lower rubber cylinder seat B11 pass through the lateral wall phase airtight connection of sealing ring B22 and central tube B2 and offset with solution sealing joint B12
It connects.
Third piston B13 is set in the outside of central tube B2 and transition joint B3, and the upper end offsets with solution sealing joint B12
It connects；4th piston B17 is set in the outside of transition joint B3 and lower contact B18；The inner sidewall of the upper end of third piston B13 passes through
The internal chamber wall of the lateral wall phase airtight connection of sealing ring B23 and central tube B2, third piston B13 passes through sealing ring B24 and centre
The lateral wall phase airtight connection of the upper end of connector B3；Lock ring B14, lock ring seat B15 and lock ring set B16 are set in transition joint B3
Outside, lock ring seat B15 passes through 4 shear pin B25 being evenly distributed to be fixed with transition joint B3 phase, the top transition joint B3 outside
Side wall is provided with a protrusion, and lock ring B14 is arranged in the lower end of the protrusion and abuts against in operation Shi Yuqi, the lower end lock ring B14
It is provided with lock ring seat B15, lock ring B14 is abutted against with lock ring seat B15；The lower end of the upper end and third piston B13 of lock ring set B16
Inner sidewall is threadably secured connection；The lateral wall of the lower end and the upper end of the 4th piston B17 of lock ring set B16 is threadably secured
Connection；The inner sidewall of the upper end of 4th piston B17 passes through the lateral wall phase airtight connection of sealing ring B26 and transition joint B3, the
The internal chamber wall of four piston B17 passes through the lateral wall phase airtight connection of sealing ring B27 and the upper end of lower contact B18；4th piston B17
Lower end pass through 4 shear pin B28 being evenly distributed and be fixedly connected with lower contact B18；The inner sidewall that lock ring covers B16 is zigzag
Structure；The lateral wall of lock ring B14 is provided with the laciniation to match with the laciniation of the inner sidewall of lock ring set B16；
Lock ring set B16 is unidirectionally slided relative to lock ring B14, and solution sealing joint B12 is magnesium alloy materials.
The present embodiment also provides a kind of wellfracturing method comprising following steps:
Above-mentioned chemistry solution sealed compression packer partial pressure tubular column top connected pipes 110 are placed in underground, then by step 1
It is suppressed into oil pipe 110, and sets the first chemistry solution sealed compression fracturing packer, the second chemistry solution sealed compression pressure break packing
Device and chemistry solution sealed compression slips fracturing packer；
Above-mentioned first chemistry solution sealed compression fracturing packer 104 and the second chemistry solution sealed compression fracturing packer 106
Set method are as follows: highly pressurised liquid is entered by inlet in the inner cavity of first piston A21 and second piston A22, push first
Piston A21 and second piston A22 are moved upwards, and cutting sets pin A25, and then main packing element A17 compression is pushed to be radially expanded, this
The laciniation of the inner sidewall of Shi Suohuan A23 is mutually engaged fixation with the laciniation of the lateral wall of lock ring seat A5, guarantees master
Packing element A17 is not sprung back；By the same way, the first chemistry solution sealed compression fracturing packer 104 and the second chemistry are respectively completed
Solution sealed compression fracturing packer 106 is set；
Above-mentioned chemistry solution sealed compression slips fracturing packer 108 sets method are as follows: liquid respectively enters third piston
The inner cavity of B13 and the 4th piston B17.(pressure of setting is set, this pressure obtains when being actual test when pressure increases to certain value
Arrive) when, the shear pin B28 being mounted on the 4th piston B17 is cut, and pushes third piston B13 and the 4th piston B17 in
Heart pipe B2's is moved axially upward, and packing element B9 is pushed to move upwards.With the internal pressure of third piston B13 and the 4th piston B17 after
Height of continuing rising, third piston B13 and the 4th piston B17 are continued up, and packing element B9 are compressed on the lateral wall of central tube B2,
When the internal pressure of third piston B13 and the 4th piston B17 reach pressure value (the obtaining when according to actual test) of setting, packing element
The decrement of B9 has reached the requirement of design, and third piston B13 and the 4th piston B17 drives lock ring set B16 to be engaged to lock at this time
On ring seat B15, guarantee that packing element B9 is not sprung back, packing element B9, which must compress, has pushed slip spider B7 to move upwards, and causes to be mounted on slips
Shear pin B20 on seat B7 is also cut therewith, and slips B4 is radially strutted under the promotion of slip spider B7, and is fixed on central tube B2's
On outer wall, to complete setting for chemistry solution sealed compression slips fracturing packer 108；
Step 2 continues to suppress into oil pipe, opens differential sand blast sliding sleeve 103, carries out first layer pressure break (such as Fig. 4 institute
Show), after first layer pressure break, well head pitching, ball is fallen on the first pitching sand blast sliding sleeve 105 of the second layer, by the second layer
The first pitching sand blast sliding sleeve 105 open, carry out second layer pressure break (as shown in Figure 5)；
Step 3, after second layer pressure break, well head pitching, ball is fallen on the second pitching sand blast sliding sleeve 107 of third layer,
Second pitching sand blast sliding sleeve 107 of the second layer is opened, is carried out third layer pressure break (as shown in Figure 6)；
While carrying out the second layer and third layer pressure break, the first chemistry solution sealed compression fracturing packer 104 and second
The upper interval of chemistry solution sealed compression fracturing packer 106 can also carry out pressure break, method are as follows: investment and the chemistry into oil pipe
The pressure break ball (soluble ball) of the corresponding size of sealed compression fracturing packer upper end sliding sleeve A9 is solved, pressure break ball falls on sliding sleeve A9
Upper end, continue plus pump pressure, the fixing pin A53 of sliding sleeve A9 cut, and sliding sleeve A9 is moved downward along axis, the through-hole of top connection A1
The inside and outside connection of duct A27, pressure break channel are opened, to realize to the first chemistry solution sealed compression fracturing packer 104 and the
The pressure break of the upper interval of two chemistry solution sealed compression fracturing packers 106；
Step 4, after pressure break, mouth of shunting in a well, to first chemistry solution sealed compression fracturing packer the 104, second chemistry solution
Solution sealing joint A8 and B12 (solution in sealed compression fracturing packer 106 and chemistry solution sealed compression slips fracturing packer 108
Sealing joint A8 reconciliation sealing joint B12 is the material of magnesium alloy material, is easier to react with water and dissolve) after dissolution,
First chemistry solution sealed compression fracturing packer the 104, second chemistry solution sealed compression fracturing packer 106 and chemistry deblocking compression
Formula slips fracturing packer 108 unseals automatically, carries out well head open flow, and chemistry solution sealed compression packer partial pressure tubular column is taken out
Well head；
Above-mentioned first chemistry solution sealed compression fracturing packer 104 and the second chemistry solution sealed compression fracturing packer 106
Deblocking can be used cooperatively with following deblocking modes that above mention, dissolve halfway emergency measure as scene solution sealing joint.It should
Deblocking mode are as follows: when due to pressure break, sliding sleeve A9 is hit down, and liquid passes through the tube wall that sand control screens A11 enters vacuum cavity A2
Upper end and top connection A1 the gap that is arranged of lower end in, and control rod A10 is dissolved, control rod A10 is soluble material
Matter beats pump pressure into well, liquid passes through the upper end of vacuum chamber cylinder A14, pushes very when control rod A10 is after underground is dissolved again
Cavity cylinder A14 is moved downward, and cuts shear pin A43, and assembly piston A15 is moved downward, and the space of lock ring A23 is conceded, thus lock ring
A23 loses protection, and back-off sub A13 is separated with releasing pup joint A12 phase, lifts in well head to tubing string, top connection A1, vacuum
Cavity A2 and releasing pup joint A12 are moved upwards together.When vacuum cavity A2 is moved upwards, the pin of fishing sleeve A16 inner sidewall is driven
The keyway of nail A34 and the lateral wall of vacuum cavity A2 fasten, so that fishing sleeve A16 be driven to move upwards, concede packing element component
The space of top, if still deblocking is difficult at this time, can be improved so that main packing element A17 be made to spring back deblocking under own resilient
Well head pulling force cuts the pin A36 on fishing sleeve A16, and top connection A1, vacuum cavity A2, releasing pup joint A12 are proposed well
Outside, the nozzle screw thread of tripping in fishing tool docking fishing sleeve, completion insulate the first chemistry solution sealed compression pressure break in well again
The first chemistry solution sealed compression pressure is completed in the salvaging of device 104 and the second chemistry solution 106 reserved part of sealed compression fracturing packer
Split the deblocking of packer 104 and the second chemistry solution sealed compression fracturing packer 106；
The deblocking of above-mentioned chemistry solution sealed compression slips fracturing packer 108 can with it is following above propose deblocking mode and cooperate make
With as the halfway emergency measure of scene solution sealing joint dissolution.The deblocking mode are as follows: when upper lifting pipe post, central tube A2 by
Upward pulling force (at this point, slips A4 and packing element A9 are stationary relative to the borehole wall) drives transition joint A3 to move upwards, shear pin
A25 is cut due to the upward pressure by transition joint A3, so as to cause central tube A2, transition joint A3 and lower contact A18
It moving upwards together, lock ring A14 unsettles and fails, slips A4 retraction, and slip spider A7 is driven to move upwardly together,
The space on the top packing element A9 is conceded, packing element A9 is unsealed under own resilient, completes chemistry solution sealed compression slips fracturing packer
108 deblocking.
In conclusion chemistry solution sealed compression packer partial pressure tubular column provided by the invention is using connection chemistry deblocking compression
Formula fracturing packer and chemistry solution sealed compression slips fracturing packer, have that structure is simple, installation is convenient with constructing operation
Feature, two kinds of chemical deblocking packers can unseal automatically, without deblocking load, after the completion of pressure break, packing element dissolution or
It discharges completely, reduces the sand setting on packing element top, greatly improve the safety of tubing string taking-up.
Claims (36)
1. a kind of chemistry solution sealed compression packer partial pressure tubular column, it is characterised in that: the chemistry solves sealed compression packer partial pressure
Tubing string includes at least two identical chemistry solution sealed compression fracturing packers and matching pitching sand blast sliding sleeve, extremely respectively
Few chemistry solution sealed compression slips fracturing packer, differential sand blast sliding sleeve, safety joint, ball seat and silk plug；
The silk plug, the ball seat, the differential sand blast sliding sleeve, at least two identical chemistry solution sealed compression pressure break
Packer and respectively matching pitching sand blast sliding sleeve, at least one described chemistry solution sealed compression slips fracturing packer and
The safety joint is fixedly connected sequentially；
Wherein, the chemistry solution sealed compression fracturing packer first connects its matched pitching sand blast sliding sleeve, and pitching sandblasting is sliding
Set is connected with next chemistry solution sealed compression fracturing packer again, and then next chemistry solution sealed compression pressure break packing
Matched pitching sand blast sliding sleeve is connected device again, and so on；
It is described chemistry solution sealed compression fracturing packer include: the first top connection, vacuum cavity, component of giving up, the first central tube,
First transition joint, the first lock ring seat, the first lower contact, solution big envelope, the first solution sealing joint, the first packing element component and first piston
Component；
First top connection is fixedly connected with the vacuum cavity, and the vacuum cavity is fixedly connected with the component of giving up,
The component of giving up is fixedly connected with first central tube, first central tube and the fixed company of first transition joint
It connects, first transition joint is fixedly connected with the first lock ring seat, and the first lock ring seat and first lower contact are solid
Fixed connection；The first lock ring seat is the connector with tubular housing；
It is described solution big envelope, the first packing element component and it is described first deblocking connector be set in first central tube outside and
It successively abuts against, the solution big envelope is fixedly connected with the component of giving up, the first solution sealing joint and the first piston group
Part abuts against；
The first piston component is set in the outer of first central tube, first transition joint and the first lock ring seat
Side；The first piston component is fixedly connected with the first lock ring seat or first lower contact.
2. chemistry solution sealed compression packer partial pressure tubular column according to claim 1, it is characterised in that: chemistry deblocking pressure
Contracting formula packer partial pressure tubular column includes the first chemistry solution sealed compression fracturing packer, the first pitching sand blast sliding sleeve, the second chemistry
Solve sealed compression fracturing packer, the second pitching sand blast sliding sleeve, chemistry solution sealed compression slips fracturing packer, differential sandblasting
Sliding sleeve, safety joint, ball seat and silk plug；
The silk plug, the ball seat, the differential sand blast sliding sleeve, the first chemistry solution the sealed compression fracturing packer, institute
State the first pitching sand blast sliding sleeve, the second chemistry solution sealed compression fracturing packer, the second pitching sand blast sliding sleeve, described
Chemistry solution sealed compression slips fracturing packer and the safety joint are fixedly connected sequentially.
3. chemistry solution sealed compression packer partial pressure tubular column according to claim 1, it is characterised in that: the chemistry deblocking
Compression fracturing packer further includes sliding sleeve；
The cunning is set on the inner cavity of first top connection, the inner cavity of the lateral wall of the sliding sleeve and first top connection
Wall is fixedly connected by fixing piece and phase airtight connection, and in operation, fixing piece is cut, and the sliding sleeve is relative to described first
Top connection slides axially；
The internal chamber wall of first top connection is arranged radially the through-hole duct being interlinked to the outside at least one, through-hole duct quilt
The sliding sleeve masking.
4. chemistry solution sealed compression packer partial pressure tubular column according to claim 3, it is characterised in that: the through-hole duct
It is equally distributed three.
5. chemistry solution sealed compression packer partial pressure tubular column according to claim 3, it is characterised in that: the fixing piece is
Pin.
6. chemistry solution sealed compression packer partial pressure tubular column according to claim 1, it is characterised in that:
The chemistry solution sealed compression fracturing packer further includes sliding sleeve；
The cunning is set on the inner cavity of first top connection, the inner cavity of the lateral wall of the sliding sleeve and first top connection
Wall is flexibly connected, and the sliding sleeve slides axially relative to first top connection；
The vacuum cavity is made of chamber and tube wall, and the tube wall of the vacuum cavity is fixedly connected simultaneously with first top connection
Phase airtight connection, axially penetrates through one duct of setting in the tube wall of the vacuum cavity, the upper end of the tube wall of the vacuum cavity with
The lower end of first top connection is provided with gap, and towards in pipe, the gap is hidden by the sliding sleeve in the void openings direction
It covers, the sliding sleeve and the inner sidewall of first top connection and the inner sidewall phase airtight connection of the vacuum cavity；
The upper end in the duct is connected with the gap, and the upper end in the duct is provided with a control rod, and the control rod is
The sealing end of the upper end in the duct.
7. chemistry solution sealed compression packer partial pressure tubular column according to claim 6, it is characterised in that: the vacuum cavity
Tube wall be fixedly connected with first top connection by holding screw.
8. chemistry solution sealed compression packer partial pressure tubular column according to claim 6, it is characterised in that: the control rod
Material is soluble material.
9. chemistry solution sealed compression packer partial pressure tubular column according to claim 6, it is characterised in that: the chemistry deblocking
Compression fracturing packer further includes sand control screens, and the opening in the gap is arranged in the sand control screens.
10. chemistry solution sealed compression packer partial pressure tubular column according to claim 1, it is characterised in that: the group of giving up
Part includes releasing pup joint, back-off sub, vacuum chamber cylinder, assembly piston and fishing sleeve；
The vacuum cavity is fixedly connected with the releasing pup joint and phase airtight connection；The releasing pup joint and the central tube phase
It abuts；
The back-off sub is set in the outside of the releasing pup joint and first central tube, the lower end of the back-off sub
Inner sidewall is fixedly connected with the lateral wall of the upper end of first central tube and phase airtight connection；The upper end of the back-off sub
Inner sidewall is fixedly connected by closing piece with the lateral wall of the lower end of the releasing pup joint and phase airtight connection；
The vacuum chamber cylinder is set in the outside of the releasing pup joint and the back-off sub, the upper end of the vacuum chamber cylinder it is interior
The lateral wall phase airtight connection of side wall and the releasing pup joint, the vacuum chamber cylinder, the back-off sub and the releasing pup joint
Three forms closed chamber；
The assembly piston is set in the outside of the back-off sub, and the lower end of the vacuum chamber cylinder offsets with the assembly piston
It connects；The upper end of the vacuum chamber cylinder and the lower end of the tube wall of the vacuum cavity abut against, and the assembly piston is given up with described
The lateral wall of connector is fixedly connected and phase airtight connection；
The fishing sleeve is set in the outside of the vacuum cavity, the vacuum chamber cylinder and the assembly piston；The fishing sleeve
The inner sidewall of upper end be shape of a hoof dentation, and be provided at least one pin on it, the lower end of the vacuum cavity it is outer
At least one keyway that side wall setting matches with the pin, the pin being capable of the opposite slidings in the keyway；It is described
The lateral wall phase airtight connection of the inner sidewall of fishing sleeve and the lower end of the vacuum cavity；The inner sidewall of the fishing sleeve with it is described
The lateral wall of the lateral wall of vacuum chamber cylinder and the assembly piston distinguishes phase airtight connection；The lower end of the fishing sleeve and the solution
The upper end of big envelope is fixedly connected.
11. chemistry solution sealed compression packer partial pressure tubular column according to claim 10, it is characterised in that: described give up connects
The inner sidewall of the lower end of head is fixedly connected by holding screw with the lateral wall of the upper end of first central tube.
12. chemistry solution sealed compression packer partial pressure tubular column according to claim 10, it is characterised in that: the assembly is lived
Plug is fixedly connected by least one shear pin with the lateral wall of the back-off sub.
13. chemistry solution sealed compression packer partial pressure tubular column according to claim 10, it is characterised in that: the pin
Quantity is uniformly distributed 5；The quantity of the keyway is uniformly distributed 5 to match with the pin.
14. chemistry solution sealed compression packer partial pressure tubular column according to claim 10, it is characterised in that: the closing piece
Quantity is uniformly distributed 4.
15. chemistry solution sealed compression packer partial pressure tubular column according to claim 12, it is characterised in that: the shear pin
Quantity is uniformly distributed 4.
16. chemistry solution sealed compression packer partial pressure tubular column according to claim 1, it is characterised in that: packing element component packet
Include main packing element, the first secondary packing element, the second secondary packing element and rubber tube seat；
Described first secondary packing element, the main packing element, the second secondary packing element and the rubber tube seat are set in first central tube
Outside and successively abut against；The first secondary packing element is abutted against with the solution big envelope, the lower end for solving big envelope and described the
The lateral wall phase airtight connection of one central tube, the lateral wall phase airtight connection of the rubber tube seat and first central tube and with institute
The first solution sealing joint is stated to abut against.
17. chemistry solution sealed compression packer partial pressure tubular column according to claim 1, it is characterised in that: the piston group
Part includes first piston, second piston, the first lock ring, sets dowel bushing and set pin；
The first piston is set in the outside of first central tube and first transition joint, and the second piston is arranged
In the outside of first transition joint and the first lock ring seat；
The first piston is abutted against with the first solution sealing joint, and the first piston is fixedly connected with the second piston；
The lateral wall phase airtight connection of the inner sidewall of the upper end of the first piston and first central tube, the first piston
Internal chamber wall and the lateral wall phase airtight connection of the upper end of first transition joint；
The lateral wall phase airtight connection of the inner sidewall of the upper end of the second piston and first transition joint, described second is living
The lateral wall phase airtight connection of the internal chamber wall of plug and the upper end of the first lock ring seat；
The lateral wall of the first lock ring seat is laciniation, and first lock ring is set in the outside of the first lock ring seat
And the saw to match with the laciniation of the lateral wall of the first lock ring seat is provided in the inner sidewall of first lock ring
Dentalation, first lock ring are unidirectionally slided relative to the first lock ring seat；
It is described set dowel bushing be set in the first lock ring seat lower end lateral wall or first lower contact lateral wall
And pin is set described in and is fixedly connected；
The second piston is set in the outside of first transition joint, the first lock ring seat and first lock ring, institute
The inner sidewall for stating the lower end of second piston is provided with a protrusion, and first lock ring is abutted against with the protrusion, first lock
Ring is abutted against with the dowel bushing that sets, and the lower end of the second piston is mutually connected with the upper end for setting dowel bushing.
18. chemistry solution sealed compression packer partial pressure tubular column according to claim 17, it is characterised in that: described to set pin
The quantity of nail is uniformly distributed 4.
19. chemistry solution sealed compression packer partial pressure tubular column according to claim 1, it is characterised in that: first solution
The material of sealing joint is magnesium alloy material.
20. chemistry solution sealed compression packer partial pressure tubular column according to claim 1, it is characterised in that: the chemistry solution
Sealed compression slips fracturing packer includes: that chemistry solution sealed compression slips fracturing packer includes the second top connection, second
It is connect under central tube, the second transition joint, slip assemblies, the second packing element component, the second solution sealing joint, second piston component and second
Head；
Second top connection is fixedly connected with second central tube, and second central tube and second transition joint are solid
Fixed connection, second transition joint are fixedly connected with second lower contact；
The slip assemblies, the second packing element component and the second deblocking connector are set on the outside of second central tube,
The slip assemblies, the second packing element component, the second solution sealing joint and the second piston component successively abut against, institute
Slip assemblies are stated to abut against with second top connection；
The second piston component is set in the outer of second central tube, second transition joint and second lower contact
Side, the upper end of the second piston component and the second central tube phase airtight connection, the lower end of the second piston component with
The second lower contact phase airtight connection.
21. chemistry solution sealed compression packer partial pressure tubular column according to claim 20, it is characterised in that: the slips group
Part includes slips, leaf spring and slip spider；
The slips is set in the outside of second central tube, and the leaf spring is set in the outside of the slips, the slips
Cover for seat is located at the outside of second central tube and is fixedly connected with second central tube；
The upper and lower side of the slips is wedge shape, and the lower end of second top connection is the wedge to match with the slips upper end
Shape, the upper end of the slips are abutted against with second top connection；
The upper end of the slip spider is the wedge shape to match with the lower end of the slips, the lower end of the slips and the slip spider
It abuts against.
22. chemistry solution sealed compression packer partial pressure tubular column according to claim 21, it is characterised in that: the slip spider
It is fixedly connected by shear pin with the lateral wall of second central tube.
23. chemistry solution sealed compression packer partial pressure tubular column according to claim 22, it is characterised in that: the shear pin
Quantity is at least four and is uniformly distributed.
24. chemistry solution sealed compression packer partial pressure tubular column according to claim 21, it is characterised in that: the slips group
Part further includes guard housing；The guard housing is set in the outside of the leaf spring, on the inner sidewall of the upper end of the guard housing and described second
The lateral wall of the lower end of connector is fixedly connected, the lateral wall phase of the inner sidewall of the lower end of the guard housing and the upper end of the slip spider
Linking.
25. chemistry solution sealed compression packer partial pressure tubular column according to claim 21, it is characterised in that: the slips group
Part further includes slip spider connector；The slip spider connector is set in the outside of second central tube, and the slip spider connector is set
It sets between the slip spider and the second packing element component, the slip spider connector is fixedly connected with the slip spider, described
Slip spider connector is abutted against with the second packing element component.
26. chemistry solution sealed compression packer partial pressure tubular column according to claim 20, it is characterised in that: second glue
Cartridge module includes packing element, upper rubber tube seat and lower rubber cylinder seat；
The packing element, the upper rubber tube seat and the lower rubber cylinder cover for seat are located at the outside of second central tube, the upper packing element
Seat, the packing element and the lower rubber cylinder seat successively abut against, and the upper rubber tube seat passes through sealing ring and second central tube
Lateral wall phase airtight connection is simultaneously abutted against with the slip assemblies, and the lower rubber cylinder seat passes through sealing ring and second central tube
Lateral wall phase airtight connection and with it is described second solution sealing joint abut against.
27. chemistry solution sealed compression packer partial pressure tubular column according to claim 20, it is characterised in that: the piston group
Part includes third piston, the second lock ring, the second lock ring seat, lock ring set and the 4th piston；
The third piston is set in the outside of second central tube and second transition joint, the upper end and described second
Solution sealing joint abuts against；4th piston is set in the outside of second transition joint and second lower contact；
The inner sidewall of the upper end of the third piston passes through the lateral wall phase airtight connection of sealing ring and second central tube, institute
The internal chamber wall for stating third piston passes through the lateral wall phase airtight connection of sealing ring and the upper end of second transition joint；
Second lock ring, the second lock ring seat and the lock ring set are set in the outside of second transition joint, described
Second lock ring seat is fixedly connected with second transition joint, and it is convex that the lateral wall on second transition joint top is provided with one
It rises, second lock ring is arranged in the lower end of the protrusion and abuts against in operation Shi Yuqi, the setting of second lock ring lower end
There is the second lock ring seat, second lock ring is abutted against with the second lock ring seat；
The upper end of the lock ring set is fixedly connected with the inner sidewall of the lower end of the third piston；The lower end of the lock ring set and institute
The lateral wall for stating the upper end of the 4th piston is fixedly connected；The inner sidewall of the upper end of 4th piston passes through sealing ring and described the
The internal chamber wall of the lateral wall phase airtight connection of two transition joints, the 4th piston passes through sealing ring and second lower contact
The lateral wall phase airtight connection of upper end；The lower end of 4th piston is fixedly connected with second lower contact；
The inner sidewall of the lock ring set is laciniation；The lateral wall of second lock ring be provided with the lock ring set in
The laciniation that the laciniation of side wall matches；The lock ring set is unidirectionally slided relative to second lock ring.
28. chemistry solution sealed compression packer partial pressure tubular column according to claim 27, it is characterised in that: the described 4th is living
The lower end of plug is fixedly connected by shear pin with second lower contact.
29. chemistry solution sealed compression packer partial pressure tubular column according to claim 28, it is characterised in that: the shear pin
Quantity is at least four and is uniformly distributed.
30. chemistry solution sealed compression packer partial pressure tubular column according to claim 27, it is characterised in that: second lock
Ring is nicked ring structure and lower end is wedge shape, and the upper end of the second lock ring seat is the lower end phase with second lock ring
Matched wedge shape, second lock ring are abutted against with the second lock ring seat.
31. chemistry solution sealed compression packer partial pressure tubular column according to claim 30, it is characterised in that: second lock
Ring seat is fixedly connected by shear pin with second transition joint.
32. chemistry solution sealed compression packer partial pressure tubular column according to claim 31, it is characterised in that: the shear pin
Quantity is at least four and is uniformly distributed.
33. chemistry solution sealed compression packer partial pressure tubular column according to claim 20, it is characterised in that: on described second
The inner sidewall of the lower end of connector is threadably secured with the lateral wall of the upper end of second central tube and connect and be threadedly coupled
Place adds sealing ring.
34. chemistry solution sealed compression packer partial pressure tubular column according to claim 20, it is characterised in that: second solution
The material of sealing joint is magnesium alloy material.
35. a kind of wellfracturing method comprising following steps:
Any one of the claim 1-34 chemistry solution sealed compression packer partial pressure tubular column connected pipes are placed in well by step 1
Under, it is then suppressed into oil pipe, and set chemistry solution sealed compression fracturing packer and chemistry solution sealed compression slips pressure break envelope
Every device；
Step 2 continues to suppress into oil pipe, opens differential sand blast sliding sleeve, first layer pressure break is carried out, when first layer pressure break is complete
Bi Hou, well head pitching, ball are fallen on the pitching sand blast sliding sleeve of the second layer, and the pitching sand blast sliding sleeve of the second layer is opened, and carry out the
Two laminations are split；
Step 3 puts into the ball of different-diameter in each layer according to the sequence that the diameter of ball is ascending, according to each layer sequence
The pitching sand blast sliding sleeve for successively opening each layer from bottom to top, carries out the pressure break of each layer；
Step 4, after pressure break, mouth of shunting in a well, to chemistry solution sealed compression fracturing packer and chemistry solution sealed compression slips pressure
After splitting the solution sealing joint dissolution in packer, chemistry solution sealed compression fracturing packer and chemistry solution sealed compression slips pressure break envelope
It is unsealed automatically every device, carries out well head open flow, chemistry solution sealed compression packer partial pressure tubular column is taken out into well head.
36. wellfracturing method according to claim 35, it is characterised in that: in step 4, the chemistry deblocking pressure
Contracting formula fracturing packer and the chemistry solution sealed compression slips fracturing packer are while each self-unsealing connector unseals automatically
Cooperation above proposes deblocking manually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611214767.XA CN106593391B (en) | 2016-12-26 | 2016-12-26 | Chemical deblocking compression type packer partial pressure pipe column and oil well fracturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611214767.XA CN106593391B (en) | 2016-12-26 | 2016-12-26 | Chemical deblocking compression type packer partial pressure pipe column and oil well fracturing method |
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| Publication Number | Publication Date |
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| CN106593391A CN106593391A (en) | 2017-04-26 |
| CN106593391B true CN106593391B (en) | 2019-03-15 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108060906B (en) * | 2017-11-22 | 2020-04-28 | 盐城他山石液压机械有限公司 | Non-throttling fracturing packer for high-pressure oil-gas well |
| CN110529061B (en) * | 2019-08-07 | 2024-02-13 | 北京金科龙石油技术开发有限公司 | Gradual deblocking expansion device |
| CN111101918B (en) * | 2020-02-21 | 2021-11-30 | 中国石油大学(北京) | Barrier fracturing string for preventing proppant from slipping and settling and application thereof |
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| US20130025849A1 (en) * | 2011-07-26 | 2013-01-31 | Baker Hughes Incorporated | Actuated packer arrangement having a degradable layer for a seal |
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| US7168494B2 (en) * | 2004-03-18 | 2007-01-30 | Halliburton Energy Services, Inc. | Dissolvable downhole tools |
| CN2866812Y (en) * | 2005-10-18 | 2007-02-07 | 中国石油天然气股份有限公司 | Natural gas well separate layer fracturing and combined layer mining integrated pipe column |
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| CN106593391A (en) | 2017-04-26 |
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