CN106246134A - A kind of High Temperature High Pressure retrievable formation testing packer - Google Patents
A kind of High Temperature High Pressure retrievable formation testing packer Download PDFInfo
- Publication number
- CN106246134A CN106246134A CN201610759845.8A CN201610759845A CN106246134A CN 106246134 A CN106246134 A CN 106246134A CN 201610759845 A CN201610759845 A CN 201610759845A CN 106246134 A CN106246134 A CN 106246134A
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- anchor
- packing element
- pipe
- centrode
- high temperature
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- 238000012360 testing method Methods 0.000 title claims abstract description 51
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 30
- 238000012856 packing Methods 0.000 claims abstract description 51
- 239000003381 stabilizer Substances 0.000 claims abstract description 18
- 229920001971 elastomer Polymers 0.000 claims abstract description 12
- 239000005060 rubber Substances 0.000 claims abstract description 12
- 241000239290 Araneae Species 0.000 claims abstract description 9
- 241000935974 Paralichthys dentatus Species 0.000 claims description 47
- 229910045601 alloy Inorganic materials 0.000 claims description 36
- 239000000956 alloy Substances 0.000 claims description 36
- 238000003825 pressing Methods 0.000 claims description 21
- 230000000694 effects Effects 0.000 claims description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 230000009977 dual effect Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 235000017771 Acacia greggii Nutrition 0.000 claims description 3
- 241000372389 Anigozanthos humilis Species 0.000 claims description 3
- 229920000459 Nitrile rubber Polymers 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 210000000332 tooth crown Anatomy 0.000 claims description 3
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 230000032798 delamination Effects 0.000 abstract description 16
- 238000010276 construction Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 3
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000003913 materials processing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- TWDJIKFUVRYBJF-UHFFFAOYSA-N Cyanthoate Chemical compound CCOP(=O)(OCC)SCC(=O)NC(C)(C)C#N TWDJIKFUVRYBJF-UHFFFAOYSA-N 0.000 description 1
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 150000008363 butyronitriles Chemical class 0.000 description 1
- -1 compound hydrogenated butyronitrile Chemical class 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1014—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well
- E21B17/1021—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well with articulated arms or arcuate springs
- E21B17/1028—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well with articulated arms or arcuate springs with arcuate springs only, e.g. baskets with outwardly bowed strips for cementing operations
-
- 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
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
-
- 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
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
- E21B33/1293—Packers; Plugs with mechanical slips for hooking into the casing with means for anchoring against downward and upward movement
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to a kind of High Temperature High Pressure retrievable formation testing packer, it is characterized in that: at least include: top connection, body, carbide inserts hydraulic anchor, upper packing element, middle packing element, lower rubber cylinder, carbide inserts split-type slips, centrode pipe, rotary stabilizer, lower righting joint；Top connection and lower righting joint are positioned at body two ends, carbide inserts hydraulic anchor it is provided with on body, upper, middle and lower packing element directly in be enclosed within centrode pipe, carbide inserts split-type slips is connected by slip groove with the slip spider on centrode pipe, and with end in contact under sphenoid, rotary stabilizer is connected with centrode pipe, can move up and down along centrode pipe.Present invention achieves oil testing and fracture tubing string to seal and well-located.Having down-hole uses the time long, applies respond well, drastically increases mechanical delamination oil testing and fracture efficiency and success rate.
Description
Technical field
The present invention relates to a kind of High Temperature High Pressure retrievable formation testing packer, belong to pressing crack construction field.
Background technology
Part low-permeability oil gas well generally uses mechanical delamination+perforating gun mode to carry out oil testing and fracture construction at present, this
Pattern requires to rob first with perforation interval of interest is carried out perforation, to form pit shaft and reservoir communicating passage, further takes out perforation
The mechanical delamination oil testing and fracture tubing string that can trip out under rifle, segmentation carries out oil testing and fracture operation, then open flow row to each interval of interest
Liquid, completion is gone into operation.This mechanical delamination oil testing and fracture tubing string tripped out uses K344 inflatable packer that it is carried out oil, set
Annular space seals and screens grappling, and this K344 inflatable packer has 4 shortcomings: it is low that (1) entirety bears pressure reduction, once work progress
There is abnormal pressure in a certain interval of middle pit shaft, it is likely that cause tubing string unstability；(2) heatproof is the highest, owing to being processed by packing element, material
Matter and the impact of tartan chemical composition, the temperature that packing element bears is not the highest, sometimes cannot adapt to formation temperature, add
Tubing string axial float Under Dynamic Load, packing element easily produces fatigue damage；(3) corrosion resistance is poor, it is considered to acidification of gas well measure or
Containing H2S gas factors, packer steel and packing element are for a long time by seriously corroded；(4) anchoring string ability, packer lower end,
The mechanism of tubing string weight is born without slips, hydraulic anchor etc. in upper end, even if adding hydraulic anchor auxiliary grappling on packer top, the most also
Cannot play effective anchoring effect, this causes due to existing hydraulic anchor design defect.Therefore, for guaranteeing mechanical delamination pressure
Oil testing and fracture operating tool string safety, solves above-mentioned K344 inflatable packer design defect, and spy devises a kind of High Temperature High Pressure can
Modus ponens formation testing packer.
Summary of the invention
It is an object of the invention to provide a kind of High Temperature High Pressure retrievable formation testing packer, by using different hardness high temperature resistant
High pressure resistant combination packing element, it is achieved that oil testing and fracture tubing string seals and well-located.Having down-hole uses the time long, and application effect is good
Good, drastically increase mechanical delamination oil testing and fracture efficiency and success rate.
The technical scheme is that a kind of High Temperature High Pressure retrievable formation testing packer, it is characterized in that: at least include: on
Joint, body, carbide inserts hydraulic anchor, upper packing element, middle packing element, lower rubber cylinder, carbide inserts split-type slips, centrode
Pipe, rotary stabilizer, lower righting joint；Top connection and lower righting joint are positioned at body two ends, and body is provided with edge hard
Alloy hydraulic anchor, upper, middle and lower packing element directly in be enclosed within centrode pipe, carbide inserts split-type slips and centrode
Slip spider on pipe is connected by slip groove, and with end in contact under sphenoid, rotary stabilizer is connected with centrode pipe, can
To move up and down along centrode pipe.
Described carbide inserts hydraulic anchor anchor generally cylindrical column structure, is axially distributed 3 roads around the external wall of anchor by 120 degree
Pressing plate groove, per pass pressing plate slot length direction is evenly distributed with 3 fixing screw holes；An anchor fluke hole is had between two screw holes,
Have six anchor fluke holes；An anchor fluke is fixed in each anchor fluke hole；Anchor fluke is made up of anchor fluke piston and hard alloy anchor fluke head；Anchor
Pawl piston hoop has an annular seal groove, and O-ring seals is socketed in the annular seal groove of anchor fluke piston；Anchor fluke is solid by pressing plate
Being scheduled on the anchor fluke hole of anchor body, fill reset dual spring in anchor fluke front end between pressing plate and anchor fluke, fixing screw is solid by pressing plate
It is scheduled on anchor body.
Described carbide inserts hydraulic anchor length 450mm, anchor fluke diameter 40mm, maximum anchorage force 550kN, hard alloy
Tooth number 24, cat's paw's angle of wedge 10.5 °.
Described upper packing element, middle packing element are identical with lower rubber cylinder, including packing element body, left shoulder protection set and the protection of right shoulder
Set, left shoulder protection set and right shoulder protection set are socketed in packing element body two ends shoulder；The external diameter 112mm of described packing element body,
Internal diameter 48mm, highly 80mm.
Described packing element body uses hydrogenated nitrile-butadiene rubber material.
Described carbide inserts split-type slips is positioned on the slip spider of centrode pipe, connects firmly with slip spider, including
Slips body, hard alloy tooth, described slips body is a kind of sphenoid, has six to inlay hard and close on slips body
The inlaid hole of golden tooth tooth, six hard alloy teeth are embedded in six inlaid holes respectively.
3 point of two row of six inlaid holes of described slips body, often row three, two row's inlaid hole Heterogeneous Permutations, the left side is arranged
The inlaid hole of row is by the thick one side of sphenoid, and the inlaid hole of the right arrangement is thin by sphenoid；Described slips body is thick
One end have two symmetrical channels from export-oriented centrage.
Described slips length 150mm, flank of tooth length 120mm, face width of tooth 30mm, the angle of wedge 15 °, thickness 24mm；Often arrange three
Adjacent two hard alloy tooth spacing 10mm in individual, circular diameter 8mm bottom each hard alloy tooth, tooth crown height
1.94mm。
Described rotary stabilizer includes the curved spring leaf of righting body, steel, hard alloy activity wiper block, righting body
Being central hollow core structure, there is end cap at two ends, are cylinder between two end cap, cylinder circumferentially 120 degree have a hard alloy activity
Wiper block is grip structure, and hard alloy activity wiper block is parallel fixing along barrel lenght direction, and described hard alloy activity is held up
The curved spring leaf of steel is had below positive block handle.
Described rotary stabilizer length 110mm, external diameter 114mm, internal diameter 78mm.
The invention have the advantage that devising rotation on centralizer structure stretches out, devises on card tile and anchor fluke head
Carbide inserts tooth, uses different hardness high-temperature-resistant high-pressure-resistant combination packing element, it is achieved that oil testing and fracture tubing string seals and location
Well.Rotary stabilizer provides slips to stretch out the fulcrum of grappling, and carbide inserts split-type slips produces relatively with casing-contact
High extrusion stress, can bear higher tubing string axial compressive force；Carbide inserts hydraulic anchor is at less hydraulic piston masterpiece
Under with, can bear higher tubing string axially on push up power.Set deblocking by put-on and delegated, rotation realization, can be used alone, can
Restting, down-hole uses the time long, applies respond well, drastically increase mechanical delamination oil testing and fracture efficiency and success
Rate.
Accompanying drawing explanation
Below in conjunction with embodiment accompanying drawing, the invention will be further described:
Figure 1A is the left-hand component of embodiment of the present invention structure device；
Figure 1B is the right-hand component of embodiment of the present invention structure device；
Fig. 2 is carbide inserts hydraulic anchor schematic diagram；
Fig. 3 is upper, middle and lower packing element schematic diagrams；
Fig. 4 is carbide inserts split-type slips schematic diagram；
Fig. 5 is rotary stabilizer schematic diagram.
In figure: 1, top connection；2, body；3, carbide inserts hydraulic anchor；4, upper packing element；5, middle packing element；6, lower rubber cylinder；7、
Carbide inserts split-type slips；8, centrode pipe；9, rotary stabilizer；10, lower righting joint；31, anchor body；32, solid
Determine screw；33, reset dual spring；34, O-ring seals；35, pressing plate；36, carbide inserts tooth anchor fluke head；37, anchor fluke piston；
41, packing element body；43, left shoulder protection set；42, right shoulder protection set；70, slips body；71, hard alloy tooth；73, edge
Embedding hole；74, symmetrical channels.
Detailed description of the invention
A kind of High Temperature High Pressure retrievable formation testing packer, seeing Figure 1A and Figure 1B, Figure 1A is a kind of High Temperature High Pressure retrievable
The left-hand component of formation testing packer, Figure 1B is the right-hand component of a kind of High Temperature High Pressure retrievable formation testing packer.
As shown in Figure 1A and Figure 1B, Fig. 2, a kind of High Temperature High Pressure retrievable formation testing packer, at least include: top connection 1, basis
Body 2, carbide inserts hydraulic anchor 3, upper packing element 4, middle packing element 5, lower rubber cylinder 6, carbide inserts split-type slips 7, centrode
Pipe 8, rotary stabilizer 9, lower righting joint 10, top connection 1 and lower righting joint 10 are positioned at body 2 two ends, and body 2 has edge
Hard alloy hydraulic anchor 3, is enclosed within centrode pipe 8 in upper packing element 4, middle packing element 5, lower rubber cylinder 6 are direct, and carbide inserts divides lobe
Formula slips 7 is connected by slip groove with the slip spider on centrode pipe 8, and with end in contact under sphenoid, rotary stabilizer 9
It is connected with centrode pipe 8, can move up and down along centrode pipe.
Described carbide inserts hydraulic anchor anchor 3 generally cylindrical column structure, is axially distributed 3 around the external wall of anchor by 120 degree
Road pressing plate groove, per pass pressing plate slot length direction is evenly distributed with 3 fixing screw holes；An anchor fluke is had between two screw holes
Hole, has six anchor fluke holes；An anchor fluke is fixed in each anchor fluke hole；Anchor fluke is by anchor fluke piston 37 and hard alloy anchor fluke head 36
Composition；Anchor fluke piston 37 hoop has an annular seal groove, O-ring seals 34 to be socketed in the annular seal groove of anchor fluke piston 37；
Anchor fluke is fixed on the anchor fluke hole of anchor body 31 by pressing plate 35, fills the double bullet of reset between pressing plate 35 and anchor fluke in anchor fluke front end
Spring 33, pressing plate 35 is fixed on anchor body 31 by fixing screw 32, and each anchor fluke is inlayed 4 hard alloy tooth (what positions
Put).Ensure that itself and internal surface of sleeve pipe have sufficiently large anchorage force.
Described carbide inserts hydraulic anchor length 450mm, anchor fluke diameter 40mm, maximum anchorage force 550kN, hard alloy
Tooth number 24, cat's paw's angle of wedge 10.5 °.
As it is shown on figure 3, described upper packing element 4, middle packing element 5 and lower rubber cylinder 6 include packing element body 41, left shoulder protection set 43 and
Right shoulder protection set 42, left shoulder protection set 43 and right shoulder protection set 42 are socketed in packing element body 41 two ends shoulder；Described glue
The external diameter 112mm of cylinder body 41, internal diameter 48mm, highly 80mm.
Described packing element body uses hydrogenated nitrile-butadiene rubber material.
The Poisson's ratio 0.47 of described packing element body 41.
Described packing element body 41 elastic modelling quantity is 9.2MPa.
Described packing element body 41 has high temperature resistant 185 DEG C, high pressure resistant 70MPa, resistance to H2S/HCl corrodes, low creep rate 10- 3mm/min。
Described upper packing element 4 and lower rubber cylinder 6 all use fiber reinforcement hydrogenated butyronitrile materials processing, and hardness is bigger；Middle packing element 5 is adopted
With compound hydrogenated butyronitrile materials processing, in hardness ratio, packing element 4 and lower rubber cylinder 6 hardness are little, have bigger under axial compression load
Deformation, seals compacting further.This elastomeric material has extremely strong corrosion resistance to acid, hydrogen sulfide, and service life is long, stability
High.
As shown in Figure 4, described carbide inserts split-type slips 7 includes slips body 71, hard alloy tooth 72, institute
The slips body 71 stated is a kind of sphenoid, at the inlaid hole 73 of slips body 71 Shang Youliuge tungsten carbide button tooth 72,
Six hard alloy teeth 72 are embedded in six inlaid holes 73 respectively.
3 point of two row of six inlaid holes of described slips body 71, often row three, two row's inlaid hole Heterogeneous Permutations, the left side
The inlaid hole of arrangement is by the thick one side of sphenoid, and the inlaid hole of the right arrangement is thin by sphenoid.
There are two symmetrical channels 74 one end of described slips body 71 thickness from export-oriented centrage.
Described slips length 150mm, flank of tooth length 120mm, face width of tooth 30mm, the angle of wedge 15 °, thickness 24mm.
Often adjacent two hard alloy tooth spacing 10mm in row three, circular diameter bottom each hard alloy tooth
8mm, tooth crown height 1.94mm.
Described slips body 71 uses anticorrosive 35CrMo material.
Described hard alloy tooth 72 surface carburization processes, and processes layer depth 0.43mm.
As it is shown in figure 5, described rotary stabilizer 9 includes that the curved spring leaf of righting body 91, steel 92, hard alloy are movable
Wiper block 93, righting body 91 is central hollow core structure, and there is end cap 94 at two ends, is cylinder 95 between two end cap, and cylinder 95 is along circle
Having a hard alloy activity wiper block 93 week 120 degree is grip structure, and hard alloy activity wiper block 93 is along cylinder 95 length
Direction is parallel fixing, has the curved spring leaf of steel 92 below described hard alloy activity wiper block 93 handle.
Described rotary stabilizer length 110mm, external diameter 114mm, internal diameter 78mm.
Slowly rotating tubing string after well head hangs tubing string, moving rotary formula centralizer 9 is along S type track on centrode pipe
Bottom dead centre when moving to top dead-centre, rotary stabilizer 9 just stretch out under steel curved spring leaf 92 elastic force effect and with set
Inside pipe wall contact is stuck, forms carbide inserts slips and starts the strong point.
Described packer maximum steel body diameter 114mm, minimum latus rectum 48mm, length 1650mm, operating temperature 145 DEG C, work
Making pressure reduction 70MPa, connection coupling is 2-7/8 " EUE external upset tubing standard box cupling.
The working method of the present invention is:
First, after Oil/gas Well utilizes lower banded cable perforating gun to form pit shaft and reservoir communicating passage, cable perforation rifle is taken out, then
According to mechanical delamination operating tool string structure chart, High Temperature High Pressure retrievable formation testing packer is arranged on mechanical delamination operating tool string
Bottom, assembly and connection good mechanical delamination oil testing and fracture tubing string.
2. above-mentioned mechanical delamination oil testing and fracture tubing string is lowered into predetermined well depth position.
After entering precalculated position down, utilize wellhead hydraulic pipe wrench slowly to rotate oil testing and fracture tubing string, rotate 1/2 ~ 1 circle, make
The hard alloy activity wiper block of rotary stabilizer goes upward to top dead-centre position by the bottom dead centre of S type track on centrode pipe
Put, stretch out under the elastic force effect of the curved spring leaf of steel and contact with internal surface of sleeve pipe, form the strong point that slips sets, continue to release
Put 20 ~ 40kN oil testing and fracture tubing string suspending weight, compression spring steel sheet, it is ensured that fulcrum is stable.
4. then proceed to discharge oil testing and fracture tubing string compression away from or suspending weight, carbide inserts split-type slips slip spider bore
Under the effect of body, axially and radially move along centrode pipe and stretch out, until the hard alloy tooth grappling set on card tile
Inside pipe wall, it is achieved reliable grappling, axial compressive force or the dynamic operation condition that can bear oil testing and fracture tubing string itself change lower tubular column
The axial compressive force that elongation strain is converted.
5. after slips anchoring, continue release oil testing and fracture tubing string compression away from or suspending weight, under axial compressive force effect, upper,
In, lower rubber cylinder gradually compressed and be radially expanded to internal surface of sleeve pipe, strengthen suspending weight, middle packing element continues deformation compacting and seals, from
And guarantee different hardness combination packing element Seal Oil pipe, casing annulus in three, to insulate layer of oil gas production.
6. after packing element sealing is intact, suppressing in oil pipe, when oil overpressure is more than annular pressure, pressure differential promotes anchor
Pawl piston starts, and compresses the reset dual spring being contained in anchor fluke piston simultaneously, and elastic force is passed to pressing plate, the most instead by reset dual spring
Bullet promotes carbide inserts anchor fluke head to stretch out and is clamped on casing wall, prevents tubing string displacement, it is achieved reliable grappling.
7. oil, set pressure reduction keep more than 10MPa, remain that hydraulic anchor is in running order.
8., according to above-mentioned steps, High Temperature High Pressure retrievable formation testing packer effectively sealing and fixed in down-hole can be completed
Position, thus provide jacket space for pressing crack construction.
9., during pressing crack construction, use oil pipe pressure break pattern, utilize 2000 type pressure break pump trucks with discharge capacity 1.0 ~ 2.0m3/ min,
It is 350 ~ 450kg/m by sand concentration3Load fluid pumps into along mechanical delamination oil testing and fracture tubing string, and a large amount of load fluids pass through preforation tunnel
Enter stratum, it is achieved the formation in the new crack of pressure break and the unlatching of intrinsic fracture, complete pressing crack construction.
10. pump truck is again with discharge capacity 2.0m3/ min injects displacement fluid, by whole for load fluid in mechanical delamination oil testing and fracture tubing string
Replace into stratum, termination of pumping.
11. pressure breaks terminate rear closing well 45min ~ 90min, utilize 6mm or 8mm oil nozzle controlledly to carry out open flow discharge opeing, if
Well head pressure is down to below 5MPa, can carry out pipe deblocking operation, otherwise continue open flow discharge opeing.
After 12. mechanical delamination oil testing and fracture have been constructed, pressure release in oil pipe, carbide inserts hydraulic anchor is at spring-force driven dual
Lower withdrawal, hydraulic anchor unseals, trips out part tubing string suspending weight, and upper, middle and lower packing element returns in situ under elastic force effect own, close
Envelope deblocking, continues to trip out part tubing string suspending weight, and carbide inserts split-type slips regains deblocking, and well head is reversely (contrary with setting)
Rotating machinery formation testing by layer fracturing string, rotary stabilizer is regained, can be completed High Temperature High Pressure retrievable formation testing packer
Deblocking.
13. treat that High Temperature High Pressure retrievable formation testing packer all solutions is honored as a queen, and trip out mechanical delamination oil testing and fracture tubing string, in time
Dismounting, inspection High Temperature High Pressure retrievable formation testing packer (containing packing element, hydraulic anchor, slips, centrode pipe) service condition, be used for
Maintenance or change High Temperature High Pressure retrievable formation testing packer, in order to follow-up again carry out mechanical delamination oil testing and fracture construction.
Claims (10)
1. a High Temperature High Pressure retrievable formation testing packer, is characterized in that: at least include: top connection, body, carbide inserts water
Power anchor, upper packing element, middle packing element, lower rubber cylinder, carbide inserts split-type slips, centrode pipe, rotary stabilizer, lower righting
Joint；Top connection and lower righting joint are positioned at body two ends, and body is provided with carbide inserts hydraulic anchor, upper, middle and lower packing element
Being enclosed within Zhi Jie on centrode pipe, carbide inserts split-type slips is with the slip spider on centrode pipe by slip groove even
Connect, and with end in contact under sphenoid, rotary stabilizer is connected with centrode pipe, can move up and down along centrode pipe.
A kind of High Temperature High Pressure retrievable formation testing packer the most according to claim 1, is characterized in that: described carbide inserts
Hydraulic anchor anchor generally cylindrical column structure, is axially distributed 3 road pressing plate grooves, per pass pressing plate slot length around the external wall of anchor by 120 degree
Direction is evenly distributed with 3 fixing screw holes；There is an anchor fluke hole between two screw holes, have six anchor fluke holes；Each
An anchor fluke is fixed in anchor fluke hole；Anchor fluke is made up of anchor fluke piston and hard alloy anchor fluke head；Anchor fluke piston hoop has an annular close
Sealing groove, O-ring seals is socketed in the annular seal groove of anchor fluke piston；Anchor fluke is fixed on the anchor fluke hole of anchor body by pressing plate,
Fill reset dual spring between pressing plate and anchor fluke in anchor fluke front end, pressing plate is fixed on anchor body by fixing screw.
A kind of High Temperature High Pressure retrievable formation testing packer the most according to claim 1, is characterized in that: described carbide inserts
Hydraulic anchor length 450mm, anchor fluke diameter 40mm, maximum anchorage force 550kN, hard alloy tooth number 24, cat's paw's angle of wedge
10.5°。
A kind of High Temperature High Pressure retrievable formation testing packer the most according to claim 1, is characterized in that: described upper packing element, in
Packing element is identical with lower rubber cylinder, including packing element body, left shoulder protection set and right shoulder protection set, left shoulder protection set and right shoulder
Protection set is socketed in packing element body two ends shoulder；The external diameter 112mm of described packing element body, internal diameter 48mm, highly 80mm.
A kind of High Temperature High Pressure retrievable formation testing packer the most according to claim 4, is characterized in that: described packing element body is adopted
Use hydrogenated nitrile-butadiene rubber material.
A kind of High Temperature High Pressure retrievable formation testing packer the most according to claim 1, is characterized in that: described edge hard closes
Gold split-type slips is positioned on the slip spider of centrode pipe, connects firmly with slip spider, including slips body, hard alloy tooth,
Described slips body is a kind of sphenoid, and at the inlaid hole of slips body Shang Youliuge tungsten carbide button tooth, six hard
Matter alloy tooth is embedded in six inlaid holes respectively.
A kind of High Temperature High Pressure retrievable formation testing packer the most according to claim 6, is characterized in that: described slips body
3 point of two row of six inlaid holes, often row three, two row's inlaid hole Heterogeneous Permutations, the inlaid hole of left side arrangement is by sphenoid thick
On one side, the inlaid hole of the right arrangement is thin by sphenoid；One end that described slips body is thick has two from export-oriented centrage
Individual symmetrical channels.
A kind of High Temperature High Pressure retrievable formation testing packer the most according to claim 7, is characterized in that: described slips length
150mm, flank of tooth length 120mm, face width of tooth 30mm, the angle of wedge 15 °, thickness 24mm；Often adjacent two hard in row three close
Golden tooth space width 10mm, circular diameter 8mm bottom each hard alloy tooth, tooth crown height 1.94mm.
A kind of High Temperature High Pressure retrievable formation testing packer the most according to claim 1, is characterized in that: described rotary righting
Device includes the curved spring leaf of righting body, steel, hard alloy activity wiper block, and righting body is central hollow core structure, and two ends have
End cap, is cylinder between two end cap, and circumferentially 120 degree have a hard alloy activity wiper block to cylinder is grip structure, hard
Alloy activity wiper block is parallel fixing along barrel lenght direction, has steel curved below described hard alloy activity wiper block handle
Spring leaf.
10., according to a kind of High Temperature High Pressure retrievable formation testing packer described in claim 1 or 9, it is characterized in that: described rotary
Centralizer length 110mm, external diameter 114mm, internal diameter 78mm.
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| CN201610759845.8A CN106246134A (en) | 2016-08-30 | 2016-08-30 | A kind of High Temperature High Pressure retrievable formation testing packer |
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| CN201610759845.8A CN106246134A (en) | 2016-08-30 | 2016-08-30 | A kind of High Temperature High Pressure retrievable formation testing packer |
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| CN114961629A (en) * | 2022-02-15 | 2022-08-30 | 上海勤源液压技术有限公司 | Protection piece and protection architecture of packer packing element |
| CN118390984A (en) * | 2024-06-27 | 2024-07-26 | 山东远卓石油技术有限公司 | Well cementation liner hanger and use method thereof |
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Application publication date: 20161221 |