CN104632133B - A kind of reverse-filling formula oil well pipe falling proof device and process - Google Patents
A kind of reverse-filling formula oil well pipe falling proof device and process Download PDFInfo
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- CN104632133B CN104632133B CN201310571620.6A CN201310571620A CN104632133B CN 104632133 B CN104632133 B CN 104632133B CN 201310571620 A CN201310571620 A CN 201310571620A CN 104632133 B CN104632133 B CN 104632133B
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- well
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B40/00—Tubing catchers, automatically arresting the fall of oil-well tubing
Abstract
A kind of reverse-filling formula oil well pipe falling proof device and process, belong to reverse-filling anti-flushing well technical field.Top connection upper end connected pipes,Inside there is inlet opening to form well-flushing passage,The built-in float ball of top connection,Support spring is divided into support,Self-styled packing element heat treatment is fixed on cylinder body,Cone is threadedly coupled and inner tube,Inner tube upper end is threadedly coupled with top connection,Its lower end is threadedly coupled with lower contact,Slip sleeve is on slips cover,Between use slips spring supporting,Standby cap is connected with centralizer body threaded upper ends,Centralizer body lower end is threadedly coupled with cylinder sleeve,Standby cap fixes spring arculae with centralizer body,Anti- seat spring upper end is fixed with centralizer body,Lower end supports piston,Piston upper end is threadedly coupled with slips cover,Glue tube base is threadedly coupled with cylinder sleeve,Damping packing element heat treatment is fixed on glue tube base,Hydraulic pressure hole is on glue tube base,Oil stream by-pass prot is in inner tube lower end,Track cylinder is connected by screw thread with glue tube base lower end,Fluid course feed liquor,Pin is articulated in the track groove of track cylinder in lower contact.
Description
Technical field
The present invention relates to a kind of reverse-filling formula oil well pipe falling proof device and process, belong to reverse-filling anti-flushing well skill
Art field.
Background technology
Current oil field mainly uses horizontal well Efficient Development oil sheet, and in addition, oil well is generally directional well, both hole deviations
Larger, well track is complicated, there is eccentric wear corrosion phenomenon in oil well production process, and tubing string is likely to occur in later stage production process
The situation that the disconnected well that comes off causes to salvage that difficulty is big, risk is high, to account for the well time long, while oil well also generally existing wax deposition is serious, heat
The low problem of well-flushing segment length, hot wash liquid pollution stratum, hot wash efficiency.At present, the pit shaft falling object protecting tool that the field occurs is main
There are three kinds：The first is that Y441-115 packers, sleeve hydraulic are given up the anti-fall property management string constituted with pressure release ball seat（Horizontal well is prevented
Junk tubing string and the optimum distance analysis of lifting tubing string, petroleum geology and engineering, 2009,26（1））, the use of Y441-115 packers
Bicone single deck tape-recorder watt anchored mode, sleeve hydraulic is given up and suppresses mode using sleeve pipe and put aside.Second is using plug+flat sieve
The compound tube string of pipe+ball check seat+Y441-146 packers assembly+releasing pup joint（Sleeve pipe Junk prevention device is on horizontal well
Improvement with application, Chemical Engineering with equipment, 2011,5（5））.The third is that Junk prevention device is connected to flow string, by anchor
Determine assembly and lock puts assembly composition, the lock tube that the lock after taking off that breaks puts assembly promotes slips to open grappling（Oil pipe Junk prevention device grinds
Study carefully and application, oil field equipment, 2003,32（6））.First two mode is hydraulic releasing formula, and oil pipe bends after being clashed into device
Deformation is difficult to salvage, while instrument is stayed in pit shaft for a long time to be difficult to unseal caused by fouling, go into the well process big to casing damage
In cannot realize Junk prevention；The third mode speed of going into the well has a strict demand, can the misoperation due to live non-standard operation.With
Upper type is without well-flushing reverse-filling function.In this regard, one kind need to be developed being connected with flow string, play lower tubular column and production process is interrupted
Grappling immediately after de-, effectively prevents tubing string from falling, and makes sleeve pipe, tubing string and device from damaging, while carrying out hot-washing wax remover operation
When can avoid hot wash liquid pollute stratum, reduce drain time, improve hot wash efficiency tubing string falling proof device.
The content of the invention
In order to overcome the deficiencies in the prior art, the present invention to provide a kind of reverse-filling formula oil well pipe falling proof device and technique
Method.
The present invention be directed to be caused after the disconnected well that comes off of oil well pipe, salvaging difficulty is big, risk is high, success rate is low, while level
Well wax deposition is serious, and flushing fluid pours in down a chimney the reverse-filling formula that stratum causes to produce drain time problem long and develops during clean-out service
Oil well pipe falling proof device.Device is connected to flow string lower end, and machinery sets under normal circumstances, can effectively be prevented after setting
Disconnected de- tubing string falls into shaft bottom, while not influenceing normal oil recovery；Rise during lower tubular column and occur being capable of achieving grappling after tubing string is disconnected de- sitting
Envelope, together rises out during lift pipe string with flow string, prevents device and stays in the feelings for being difficult to unseal in pit shaft because of fouling for a long time
Condition；Tubing string fundamentally reduces tubing string distance of fall when disconnected de-, so as to prevent the generation of strong impact power, effectively prevent sleeve pipe,
Tubing string is with device from damaging；During hot wash operation, device packing stratum effectively prevents hot wash liquid from pouring in down a chimney stratum, reduces production row
The liquid time.
A kind of reverse-filling formula oil well pipe falling proof device, top connection upper end connected pipes inside have inlet opening to form well-flushing
Passage, the built-in float ball of top connection, divides into support spring and supports, and self-styled packing element heat treatment is fixed on cylinder body, cone screw thread
Connection and inner tube, inner tube upper end is threadedly coupled with top connection, and its lower end is threadedly coupled with lower contact, slip sleeve on slips cover,
Between use slips spring supporting, standby cap is connected with centralizer body threaded upper ends, and centralizer body lower end is threadedly coupled with cylinder sleeve, standby cap with help
Roman, cylinder sleeve fix spring arculae, and anti-seat spring upper end is fixed with centralizer body, and lower end supports piston, piston upper end and slips cover
Threaded connection, glue tube base be threadedly coupled with cylinder sleeve, damps packing element and is heat-treated and is fixed on glue tube base, hydraulic pressure hole on glue tube base,
Oil stream by-pass prot is connected by screw thread in inner tube lower end, track cylinder with glue tube base lower end, fluid course feed liquor, the pin in lower contact
Nail is articulated in the track groove of track cylinder.
A kind of reverse-filling formula oil well pipe fall arrest process, contains following steps；
When normally setting, device is gone into the well to after precalculated position, above puts on joint, and drive inner tube is up, and lower contact is on
OK, rotation decentralization, now pin removal track cylinder, enables inner tube descending, transfers tubing string, and the descending band movable cone of inner tube is descending,
Slips is strutted using tubing string deadweight, internal surface of sleeve pipe is anchored to, device sets completion；
Lift pipe string is disconnected de-：Device deblocking during lift pipe string, meets and breaks de-, and tubing string sinks suddenly, the delayed cone of slips, again
Promote slips to open to set；
Lower tubular column is disconnected de-：Whereabouts medium velocity increases suddenly after tubing string is disconnected de-, and device runs into liquid（Gas）Afterwards, packing element is damped
Extruding liquid（Gas）Form resistance, liquid（Gas）Forming pressure into inlet opening promotes the anti-seat spring of piston compression up,
Promote slips cover up, drive slips up, while cone is descending with inner tube freely falling body, slips forms relative fortune with cone
It is dynamic, slips is strutted, internal surface of sleeve pipe is anchored to, prevent tubing string from falling；
Deblocking：Upper lifting pipe post, cone is up, and slips is reclaimed in the presence of slips spring, device deblocking；
Spring arculae and internal surface of sleeve pipe CONTACT WITH FRICTION, there is provided device body support force, centralizing tool, anti-seat spring are fixed and lived
Plug, prevents misoperation, and damping packing element provides resistance, reduces falling speed for device falls, while promoting the raw pressure of liquid miscarriage
Slips；
Well-flushing：Flushing fluid is injected from oil jacket annular space, self-styled packing element external diameter is more than casing inner diameter, insulates casing annulus, well-flushing
Liquid enters top connection inner chamber by well-flushing passage, and well-flushing hydraulic coupling pushes float ball, after floating compression spring that liquid is descending logical
Road is sealed, and prevents flushing fluid descending, and flushing fluid is up to discharge from oil pipe, completes anti-flushing well circulation.
It is an advantage of the invention that：（1）Device for mechanical sets under normal circumstances；（2）Play the de- rear device of lower tubular column process interrupt
Can set rapidly, device distance of glide and impulsive force are small；（3）After device sets, can effectively prevent from falling into shaft bottom after tubing string is disconnected de-,
The lower compressive load of 804KN can be born simultaneously；（4）Falling proof device upper lifting pipe post can be unsealed, and deblocking power is small.（5）During well-flushing, pressure-bearing
25MPa, without pressure drop.
Brief description of the drawings
When considered in conjunction with the accompanying drawings, by referring to following detailed description, can more completely more fully understand the present invention with
And the adjoint advantage of many of which is easily learnt, but accompanying drawing described herein is used for providing a further understanding of the present invention,
A part of the invention is constituted, schematic description and description of the invention is used to explain the present invention, does not constitute to this hair
Bright improper restriction, such as figure are wherein：
Fig. 1 is structural profile schematic diagram of the invention.
Fig. 2 is field test wellbore schematic of the invention.
The present invention is further described with reference to the accompanying drawings and examples.
Specific embodiment
Obviously, those skilled in the art belong to guarantor of the invention based on many modifications and variations that spirit of the invention is done
Shield scope.
Embodiment 1：As shown in Figure 1 and Figure 2, reverse-filling formula oil well pipe falling proof device is mainly prevented by, well-flushing from top to down
Pour in down a chimney mechanism, anchor mechanism, righting mechanism, damping mechanism, mechanical setting mechanism composition.Well-flushing reverse-filling mechanism is mainly well-flushing
Circulation canal is provided, and stratum can be insulated, prevent flushing fluid from polluting stratum；Anchor mechanism Main Function is when tubing string is disconnected de-
Or machinery is when setting, device is anchored to internal surface of sleeve pipe, accepts tubing string, prevents it from falling；Righting mechanism is mainly instrument and sets, solves
Envelope provides support force, secondly centralizing tool, it is to avoid premature setting during going into the well；Damping mechanism Main Function is when tubing string occurs
Break after taking off, extruded by liquid level, the pressure of generation promotes slips to be anchored to sleeve pipe；Mechanical block sealing mechanism mainly completes machine
Tool sets action.
（1）The present apparatus is connected to flow string lower end, and normal condition sets mode for " above proposing-rotate decentralization " tubing string, sits
Being honored as a queen can prevent disconnected de- tubing string from falling, and upper lifting pipe post is unsealed, and is together risen out with tubing string, easy to operate.（2）When a down tube
When occurring to break de- during post, the self-styled packing element extruding liquid of damping mechanism, the raw pressure promotion slips of liquid miscarriage makes its grappling, holds
Disconnected de- tubing string is connect, prevents from falling into shaft bottom.（3）Hot wash circulation canal is provided during hot wash pit shaft, and casing annulus can be insulated, prevent
Only hot wash liquid pours in down a chimney stratum.
A kind of reverse-filling formula oil well pipe falling proof device and process, test well pit shaft liquid level 600m are real respectively
The disconnected demoulding plan of tubing string of the device more than liquid level, below liquid level is applied and the disconnected demoulding after normal mechanical sets has been intended.
（1）During device is gone into the well（It is more than pit shaft liquid level）The disconnected demoulding is intended：
Reverse-filling formula oil well pipe falling proof device connection flow string is gone into the well to precalculated position（545.4m）, ground is beaten
Pressure makes to be connected to the back-off sub disconnection of tubing string the top, and tubing string forms disconnected de- dropping process, break de- rear device grappling immediately, dress
Put distance of glide 0.25m.
（2）During device is gone into the well（Below pit shaft liquid level）The disconnected demoulding is intended：
Reverse-filling formula oil well pipe falling proof device connection flow string is gone into the well to precalculated position（1487.6m）, ground
Suppressing disconnects the back-off sub for being connected to tubing string the top, and tubing string forms disconnected de- dropping process, device grappling immediately after taking off of breaking,
Device distance of glide 0.47m.
（3）It is normal to set and the disconnected demoulding plan of lift pipe string：
Lower instrument sets：Reverse-filling formula oil well pipe falling proof device connection flow string is gone into the well to precalculated position
（1487.6m）, upper lifting pipe post, rotation decentralization grappling set.Bottom out：Decentralization tubing string, loadmeter suspending weight load is declined by 21.5KN
During for 0KN, tubing string load is fully fallen on device, and the actual setting position of instrument is constant, judges that falling proof device sets intact.
Tubing string is disconnected de-：Tubing string is above carried into 9.6m（Unload next oil pipe）, ground is suppressed to be made to be connected to losing for tubing string the top
Hand joint disconnects, and is changed into inactive state after the 0.62m of device whereabouts, and impulsive force is about 199KN, the effective grappling of device, and playing prevents
The effect that tubing string falls.
Pull out of hole：Continue upper lifting pipe post, tubing string is unsealed, a flowline does not occur bending and deformation, falling proof device is intact.
Embodiment 2：As shown in Figure 1 and Figure 2,
A kind of reverse-filling formula oil well pipe falling proof device, the upper end connected pipes of top connection 1 inside have inlet opening to form well-flushing
Passage 2, the built-in float ball 3 of top connection 1, divides into support spring 5 and supports, and the heat treatment of self-styled packing element 4 is fixed on cylinder body 6, is bored
Body 7 is threadedly coupled and is threadedly coupled with top connection 1 with inner tube 8, the upper end of inner tube 8, and its lower end is threadedly coupled with lower contact 25, slips 9
Be enclosed within slips cover 11, between supported with slips spring 10, standby cap 12 is connected with the threaded upper ends of centralizer body 14, the lower end of centralizer body 14
It is threadedly coupled with cylinder sleeve 16, standby cap 12 fixes spring arculae 13 with centralizer body 14, cylinder sleeve 16, anti-to sit the upper end of spring 15 and centralizer body
14 fix, and lower end support piston 17, the upper end of piston 17 is threadedly coupled with slips cover 11, and glue tube base 18 is threadedly coupled with cylinder sleeve 16,
The damping heat treatment of packing element 19 is fixed on glue tube base 18, and on glue tube base 18, oil stream by-pass prot 21 is under inner tube 8 in hydraulic pressure hole 20
End, track cylinder 22 is connected by screw thread with the lower end of glue tube base 18, and the feed liquor of fluid course 23, the pin 24 in lower contact 25 is articulated in
In the track groove of track cylinder 22.
A kind of reverse-filling formula oil well pipe fall arrest process, contains following steps；
It is normal that device is gone into the well to after precalculated position, above puts on joint 1, drives inner tube 8 up when setting, lower contact 25 with
It is up, rotation decentralization, now pin 24 remove track cylinder 22, enable inner tube 8 descending, transfer tubing string, the descending drive of inner tube 8
Cone 7 is descending, and slips 9 is strutted using tubing string deadweight, is anchored to internal surface of sleeve pipe, and device sets completion.
Lift pipe string is disconnected de-：Device deblocking during lift pipe string, is met and breaks de-, and inner tube 8 is sunk suddenly, the delayed cone 7 of slips 9,
Promote slips 9 to open again to set；
Lower tubular column is disconnected de-：Whereabouts medium velocity increases suddenly after tubing string is disconnected de-, and device runs into liquid（Gas）Afterwards, packing element is damped
19 extruding liquid（Gas）Form resistance, liquid（Gas）Forming pressure into inlet opening 20 promotes piston 17 to compress anti-seat spring
15 is up, promotes slips cover 11 up, drives slips 9 up, while cone 7 is descending with the freely falling body of inner tube 8, slips 9 and cone
Body 7 forms relative motion, struts slips 9, is anchored to internal surface of sleeve pipe, prevents tubing string from falling.
Deblocking：Upper lifting pipe post, cone 7 is up, and slips is reclaimed in the presence of slips spring 10, device deblocking.
Spring arculae 13 and internal surface of sleeve pipe CONTACT WITH FRICTION, there is provided device body support force, centralizing tool, anti-seat spring 15 are consolidated
Fixed piston 17, prevents misoperation, and damping packing element 19 provides resistance, reduces falling speed for device falls, while liquid is miscarried giving birth to
Pressure promotes slips；
Well-flushing：Flushing fluid is injected from oil jacket annular space, the external diameter of self-styled packing element 4 is more than casing inner diameter, insulates casing annulus, well-flushing
Liquid enters top connection inner chamber by well-flushing passage 2, and well-flushing hydraulic coupling pushes float ball 3, by under liquid after the compression spring of float ball 3
Row of channels is sealed, and prevents flushing fluid descending, and flushing fluid is up to discharge from oil pipe, completes anti-flushing well circulation.
As described above, embodiments of the invention are explained, but as long as essentially without this hair of disengaging
Bright inventive point and effect can have many deformations, and this will be readily apparent to persons skilled in the art.Therefore, this
The variation of sample is also integrally incorporated within protection scope of the present invention.
Claims (3)
1. a kind of reverse-filling formula oil well pipe falling proof device, it is characterised in that top connection upper end connected pipes, inside there is inlet opening
Well-flushing passage is formed, the built-in float ball of top connection is divided into support spring and supported, self-styled packing element heat treatment is fixed on cylinder body,
Cone is threadedly connected to inner tube, and inner tube upper end is threadedly coupled with top connection, and its lower end is threadedly coupled with lower contact, and slip sleeve is in card
Watt cover on, between use slips spring supporting, standby cap is connected with centralizer body threaded upper ends, and centralizer body lower end is threadedly coupled with cylinder sleeve,
Standby cap fixes spring arculae with centralizer body, and anti-seat spring upper end is fixed with centralizer body, and lower end supports piston, piston upper end and slips
Cover threaded connection, glue tube base is threadedly coupled with cylinder sleeve, and damping packing element heat treatment is fixed on glue tube base, and hydraulic pressure hole is in glue tube base
On, oil stream by-pass prot is connected by screw thread in inner tube lower end, track cylinder with glue tube base lower end, fluid course feed liquor, in lower contact
Pin be articulated in track cylinder track groove in.
2. a kind of reverse-filling formula oil well pipe of the reverse-filling formula oil well pipe falling proof device described in use claim 1 is anti-fall
Fall process, it is characterised in that contains following steps；
When normally setting, device is gone into the well to after precalculated position, above puts on joint, and drive inner tube is up, and lower contact is up therewith, rotation
Turn decentralization, now pin removes track cylinder, enables inner tube descending, transfer tubing string, the descending band movable cone of inner tube is descending, using pipe
Post deadweight struts slips, is anchored to internal surface of sleeve pipe, and device sets completion；
Lift pipe string is disconnected de-：Device deblocking during lift pipe string, meets and breaks de-, and tubing string sinks suddenly, the delayed cone of slips, promotes again
Slips opens and sets；
Lower tubular column is disconnected de-：Whereabouts medium velocity increases suddenly after tubing string is disconnected de-, after device runs into liquid or gas, damping packing element extruding
Liquid or gas form resistance, and liquid or gas enter inlet opening formation pressure and promote the anti-seat spring of piston compression up, promotes
Slips cover is up, drives slips up, while cone is descending with inner tube freely falling body, slips forms relative motion, support with cone
Slips is opened, internal surface of sleeve pipe is anchored to, prevents tubing string from falling；
Deblocking：Upper lifting pipe post, cone is up, and slips is reclaimed in the presence of slips spring, device deblocking；
Spring arculae and internal surface of sleeve pipe CONTACT WITH FRICTION, there is provided device body support force, centralizing tool, anti-seat spring fixed piston,
Misoperation is prevented, damping packing element provides resistance, reduces falling speed for device falls, while making the raw pressure push card of liquid miscarriage
Watt；
Well-flushing：Flushing fluid is injected from oil jacket annular space, self-styled packing element external diameter is more than casing inner diameter, insulate casing annulus, flushing fluid leads to
Well-flushing passage into top connection inner chamber is crossed, well-flushing hydraulic coupling pushes float ball, by liquid down going channel after float ball compression spring
Sealing, prevents flushing fluid descending, and flushing fluid is up to discharge from oil pipe, completes anti-flushing well circulation.
3. a kind of reverse-filling formula oil well pipe of the reverse-filling formula oil well pipe falling proof device described in use claim 1 is anti-fall
Fall process, it is characterised in that contains following steps；
Step 1), device go into the well during and when more than pit shaft liquid level the disconnected demoulding intend；
Reverse-filling formula oil well pipe falling proof device connection flow string is gone into the well to the precalculated position away from well head 545.4m, ground
Suppressing disconnects the back-off sub for being connected to tubing string the top, and tubing string forms disconnected de- dropping process, device grappling immediately after taking off of breaking,
Device distance of glide 0.25m；
Step 2), device go into the well during and when below pit shaft liquid level the disconnected demoulding intend；
Reverse-filling formula oil well pipe falling proof device connection flow string is gone into the well to the precalculated position away from well head 1487.6m, ground
Face is suppressed makes the back-off sub disconnection for being connected to tubing string the top, and tubing string forms disconnected de- dropping process, and break de- rear device anchor immediately
It is fixed, device distance of glide 0.47m；
Step 3), normal set and the disconnected demoulding of lift pipe string is intended；
Lower instrument sets：Reverse-filling formula oil well pipe falling proof device connection flow string is gone into the well to away from well head 1487.6m's
Precalculated position, upper lifting pipe post, rotation decentralization grappling sets；Bottom out：Decentralization tubing string, loadmeter suspending weight load is dropped to by 21.5KN
During 0KN, tubing string load is fully fallen on device, and the actual setting position of instrument is constant, judges that falling proof device sets intact；
Tubing string is disconnected de-：Tubing string is above carried 9.6m and next oil pipe is unloaded, ground is suppressed to make to be connected to giving up for tubing string the top and connect
Head disconnects, and is changed into inactive state after the 0.62m of device whereabouts, and impulsive force is 199KN, the effective grappling of device, plays under preventing tubing string
The effect for falling；
Pull out of hole：Continue upper lifting pipe post, tubing string is unsealed, a flowline does not occur bending and deformation, falling proof device is intact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310571620.6A CN104632133B (en) | 2013-11-13 | 2013-11-13 | A kind of reverse-filling formula oil well pipe falling proof device and process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310571620.6A CN104632133B (en) | 2013-11-13 | 2013-11-13 | A kind of reverse-filling formula oil well pipe falling proof device and process |
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| CN104632133B true CN104632133B (en) | 2017-05-31 |
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2013
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| US4284137A (en) * | 1980-01-07 | 1981-08-18 | Taylor William T | Anti-kick, anti-fall running tool and instrument hanger and tubing packoff tool |
| CN2466345Y (en) * | 2001-01-10 | 2001-12-19 | 李�杰 | Oil pipe falling preventing device |
| CN201092844Y (en) * | 2007-08-24 | 2008-07-30 | 阜新驰宇石油机械有限公司 | Mechanical bridge packer |
| CN201874535U (en) * | 2010-11-25 | 2011-06-22 | 张秀梅 | Anti-drop device for pipe string of oil-water well |
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| CN104632133A (en) | 2015-05-20 |
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