CN109973046A - ZFD type leak stopping system - Google Patents
ZFD type leak stopping system Download PDFInfo
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- CN109973046A CN109973046A CN201711451636.8A CN201711451636A CN109973046A CN 109973046 A CN109973046 A CN 109973046A CN 201711451636 A CN201711451636 A CN 201711451636A CN 109973046 A CN109973046 A CN 109973046A
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- 238000005553 drilling Methods 0.000 claims abstract description 46
- 210000002445 nipple Anatomy 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 21
- 230000008569 process Effects 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 claims abstract description 5
- 238000007667 floating Methods 0.000 claims description 44
- 239000000956 alloy Substances 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 20
- 229910045601 alloy Inorganic materials 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 15
- 239000002002 slurry Substances 0.000 claims description 13
- 230000009471 action Effects 0.000 claims description 11
- 230000004087 circulation Effects 0.000 claims description 10
- 230000008014 freezing Effects 0.000 claims description 10
- 238000007710 freezing Methods 0.000 claims description 10
- 230000003628 erosive effect Effects 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 8
- 230000003068 static effect Effects 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 238000012423 maintenance Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 208000027418 Wounds and injury Diseases 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 230000006378 damage Effects 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000009827 uniform distribution Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 230000000994 depressogenic effect Effects 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 claims description 2
- 208000014674 injury Diseases 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000007790 scraping Methods 0.000 claims description 2
- 230000035939 shock Effects 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000011105 stabilization Methods 0.000 claims description 2
- 229910001069 Ti alloy Inorganic materials 0.000 claims 2
- 238000002955 isolation Methods 0.000 claims 2
- 238000010009 beating Methods 0.000 claims 1
- 238000011084 recovery Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- 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
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- 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)
- Earth Drilling (AREA)
Abstract
The present invention is a kind of ZFD type leak stopping system, and when being to solve to occur in drilling process leakage, carry out leak stopping that can be timely, multiple in the case where not pulling out of hole handles leakage complex accident, can effectively reduce the number that makes a trip.It is more suitable in well carrying out leak stopping in the case where with a variety of downhole instruments such as rotary steering, vertically-guided, MWD, screw rod and downhole tool, various downhole instruments can be effectively protected.Because its hydrophthalmia is larger, unimpeded, it can be salvaged and be launched to keyed MWD instrument is sat, have many advantages that other leak stoppage tools do not have.PBL leak stopping system is commonly used, effect is ideal, but at high cost.Since it is furnished with cage pipe nipple, so the salvaging and dispensing of keyed MWD instrument can not be carried out sitting.Our ZFD type leak stopping system, is simple to manufacture, is practical, small investment.It is flexible and convenient to bypass leak stopping, functional reliability is high, can be widely applied to oil drilling system, improves the overall economic efficiency of drilling well.
Description
Technical field
It is oil drilling system ZFD type leak stopping system that the present invention, which is a kind of, after leakage occurs for drilling well, in the feelings not pulled out of hole
Multiple leak stopping can be carried out under condition at any time, can be effectively protected while leak stopping underground rotary steering, vertically-guided, MWD,
A variety of downhole instruments such as screw rod and tool meet the MWD seat keyed instrument salvaging after bit freezing occurs, instrument is beaten after breaking down
Fishing maintenance and dispensing, it is ensured that the safe handling of wireless drilling instrument, reduction make a trip.
Background technique
Leakage is to influence one of drilling safety, the complex situations for endangering most serious, and the generation of leakage can not only give spudder
Journey brings loss, also brings great difficulty for the exploration and development of petroleum resources, because leakage cause is collapsed, because leakage causes spray, borehole well instability, damage
Evil reservoir etc. is that leakage brings problem in our drilling process.Most wellbores have different degrees of leakage, serious leakage
It will lead to borehole wall stability decline, influence the speed of drilling well, can also induce blowout or even threaten the personal safety of operating personnel,
Protection of the leakage also to oil-gas exploration and oil gas field brings a great deal of trouble trouble, so we should adopt a series of measures to control well
The generation of leakage.
PBL ball-throwing type leak stopping system effect used at present is more satisfactory, but there are many defects and deficiencies in use.
Without larger smooth hydrophthalmia, pitching number is also limited by cage pipe nipple capacity its internal structure complexity, expensive.Cause
Hydrophthalmia for drilling tool is the life channel of drilling well, without smooth hydrophthalmia, will bring many inconvenience to the processing of down-hole accident,
Such as can not deviational survey, can not carry out sitting passing through for the salvaging of keyed MWD instrument, dispensing and other accident treatment tools.
In order to solve this problem, we are according to the structure of wireless drilling instrument, the spy of the internal diameter of drill collar and down-hole equipment
Sign has investigated ZFD type leak stopping system, and because its by-pass prot hydrophthalmia is larger etc., advantages can have in time in the case where not pulling out of hole
The pressurization sealing construction of the multiple high concentration of the progress of effect, bulky grain plugging material prevents to handle leakage complex accident because rising
Generation that is close and inducing the serious accidents such as blowout, well slough, bit freezing is bored or dropped, the number that makes a trip can be effectively reduced, using bypass
Mode allow plugging material from by-pass prot enter annular space carry out leak stopping, can more be effectively protected underground rotary steering, vertically-guided,
A variety of downhole instruments such as MWD, screw rod and tool.After bit freezing, it can also pass through its main hydrophthalmia at any time, by shaft bottom
MWD instrument, which is salvaged, to be come, the application risk of lowering apparatus, it is ensured that the safe handling of instrument.It can also be by the MWD after breaking down
Instrument is salvaged from shaft bottom by its hydrophthalmia to continue dispensing after ground maintenance replacement and work to shaft bottom, can subtract in this way
A few brill, can also carry out the processing of deviational survey or other accident by its hydrophthalmia.
Summary of the invention
(1), the purpose of the present invention has at following 5 points:
1. studying a kind of its ontology of leak stopping pipe nipple has a biggish by-pass prot, when leak stopping, opens other while closing main hydrophthalmia
Downhole instrument and downhole tool is effectively protected in through-hole.
2. it is larger, unimpeded to study a kind of hydrophthalmia, the accident treatment tool that carries out can satisfy, MWD instrument is salvaged and it is logical to launch
The leak stopping pipe nipple tool crossed.
3. studying the opening that a kind of dispensing by salvaging type pitching carries out closing and the by-pass prot of main hydrophthalmia.
4 study a kind of closing that the opening and by-pass prot of main hydrophthalmia are completed from the mode for floating fisher salvaging pitching.
5. studying a kind of mode of wired salvaging pitching to complete the opening of main hydrophthalmia and the closing of by-pass prot.
Its general purpose is: developing a kind of closing and by-pass prot that main hydrophthalmia is completed by the way of mechanical pitching
It opens, using completing the opening of main hydrophthalmia and the closing of by-pass prot from floating salvage by the way of pitching or wired salvaging pitching, has
Larger smooth main hydrophthalmia passes through convenient for various downhole instruments and fishing tool, using by-pass prot come by plugging material, from
And downhole instrument and downhole tool is effectively protected.
(2), the working principle and mode of operation of ZFD type leak stopping system:
(1) working principle:
The working principle of ZFD type leak stopping system: it is a kind of leak stopping of bypass, by pump pressure, using mechanical pitching
Mode completes the opening of closing and the by-pass prot of main hydrophthalmia.Salvaging type pitching is launched after leakage occurs, pitching can reach ball seat
The main hydrophthalmia of ball seat is blocked in position, and ball seat downlink is pushed under the action of pump pressure, and after reaching certain position, by-pass prot can be beaten
It opens, the annular space that the slurry of leak stopping at this time can enter open hole well by by-pass prot realizes the stifled of static leak stopping, pressurization sealing or other means
Leakage.After leak stopping terminates termination of pumping, ball seat pushes ball seat uplink to close by-pass prot under the action of the spring, and pitching is blocked main hydrophthalmia and prevented
Leak stopping slurry enters down-hole equipment.After the completion of leak stopping slurry rinses, by salvaging pitching from floating fisher, well is floated to by buoyancy
Mouth takes out, to open main hydrophthalmia, this completes entire Process of Leaking Stoppage, restores normal drilling.
(2) ZFD type leak stopping system's operating mode:
1. carrying out the preparation before leak stopping, matched pitching is chosen according to the internal diameter of main hydrophthalmia pitching seat,
Detailed wiper block, fishing head and the pitching for checking salvaging type pitching, guarantees without bump injury.
2. detailed inspection is from fishing spear, fisher, the every buoyant cabin of floating fisher, it is ensured that intact flawless and draw
Wound.The quantity of buoyant cabin is determined according to the density of mud, cannot at least be less than 6.
3. being assembled on ground and connecting each buoyant cabin, fishing spear, the fisher from floating fisher, it is ensured that each connection
The fastening at position.
Salvaging type pitching is put into from well head drilling tool water hole 4. dismantling kelly bar, is then linked closely in well head connection kelly bar,
Salvaging type pitching is conveyed to shaft bottom with former mud turn on pump.It is required that engineers and technicians accurately count according to discharge capacity and drilling tool volume
The time that salvaging type pitching reaches main hydrophthalmia ball seat hole site is calculated, discharge capacity is adjusted when calculating time 3/4ths and is lower than 14L/S,
Reduce shock of the pitching to ball seat.After entering seat to calculating time pitching, it can be pumped into leak stopping slurry, pump pressure is utilized to open by-pass prot.
The annular space that the slurry of leak stopping at this time can enter open hole eye by by-pass prot, which is realized, carries out the stifled of static leak stopping, pressurization sealing or other means
Leakage.
5. closing blowout preventer at this time if it is pressurization sealing, leak stopping slurry (4L/S discharge capacity) is slowly pumped into small displacement, it is slow by several times
Slowly be pumped into, by calculate, after all plugging materials fully enter drop ply well section annular space casing pressure stabilization does not drop, illustrate leak stopping at
Function.
6. opening blowout preventer at this time, continues remaining plugging material in the turn on pump circulation clean drilling rod of thorough cleaning, prevent main water
Eye enters in instrument, screw rod or other drilling tools after opening.
7. ball seat pushes ball seat uplink to close by-pass prot under the action of the spring after termination of pumping.Kelly bar is dismantled, will be beaten from floating
It fishes out device to put into from well head drilling tool water hole, has 1-2 meters of floating drum at this time and leak out well head, connect drill with ferrule in well head after floating drum is depressed
Bar links closely, it is desirable that more people's cooperations prevent from scraping disconnected buoyant cabin.
8. engineers and technicians accurately calculate from floating fisher according to discharge capacity and drilling tool volume and reach bypass hole site
Time adjusts discharge capacity when calculating time 3/4ths and is lower than 34L/S, reduces from hitting between floating fisher and salvaging type pitching
It hits.It more than termination of pumping after the calculating time, drives pitching to float from floating fisher, opens main hydrophthalmia, to complete to bypass bore closure, master
The whole process that hydrophthalmia is opened.
9. floating to well head from floating fisher (can also be logical using winch when can not float if taking pitching from floating fisher
The mode for crossing wired salvaging is salvaged to ground).Come from floating fisher and salvaging type pitching from wellhead, restores normal and bore
Into.
10. if you need to secondary or multiple leak stopping, method is same as above.Static leak stopping is fairly simple, according to the spirit of the feature of Underwell leakage
Selection living.
(3) the salvaging maintenance after the wireless drilling instrument salvaging after bit freezing and wireless drilling instrument break down is launched:
Due to previous used PBL ball-throwing type leak stopping system because it does not have larger smooth hydrophthalmia, once bit freezing occurs
After can not salvage, can not carry out the salvaging after wireless drilling instrument breaks down maintenance and launch, can not deviational survey and other accident
Handling implement passes through in its hydrophthalmia, and it is insufficient that ZFD type leak stopping system effectively meets and overcome PBL ball-throwing type leak stopping system.
1. use is wired when in down-hole equipment with ZFD type leak stopping system drilling after complex accident and bit freezing occurs
With bore winch can the wireless drilling instrument by underground with foldable type centralizer at any time salvage to ground, it is ensured that wireless drilling instrument
The safe handling of device (foldable type centralizer can pass through in main hydrophthalmia).
2., once wireless drilling instrument breaks down, use is wired when in down-hole equipment with ZFD type leak stopping system drilling
It is salvaged to launch to underground again after repairing replacement to ground with brill winch and be worked on, this salvaging dispensing technology is
Through very mature, so as to reduce by a trip time.
3. in down-hole equipment with ZFD type leak stopping system drilling, can also by its hydrophthalmia carry out deviational survey or its
Its accident treatment.
(3), beneficial effects of the present invention, technical solution, technological highlights:
Once putting into salvaging type pitching the beneficial effects of the present invention are: underground is missed, being led under the action of pump pressure
Hydrophthalmia is closed, by-pass prot is opened, and the annular space that the slurry of leak stopping at this time can enter open hole well by by-pass prot realizes that static leak stopping, pressure-bearing are stifled
The leak stopping of leakage or other means after leak stopping, is pumped into from floating fisher and salvages pitching, and termination of pumping drives pitching from floating fisher
It floats, realizes the closing of by-pass prot, the opening of main hydrophthalmia.After complicated bit freezing occurs for underground, keyed MWD instrument can will be sat at any time
Device is salvaged to come from shaft bottom, it is ensured that the safe handling of instrument, the seat keyed MWD instrument after can also breaking down are salvaged
It is launched with after maintenance, it is possible to reduce make a trip for one time.Deviational survey can also be carried out by its hydrophthalmia or other accident is handled.
A variety of downhole instruments and the tools such as protection underground rotary steering, vertically-guided, MWD, the screw rod that bypass leak stopping can imitate.
The present invention the technical solution to solve the technical problem is that: it is as shown in the picture to design and process a kind of system.ZFD
Type leak stopping system is mainly made of three parts: by-passing valve pipe nipple, salvaging type pitching, certainly floating fisher.
1. by-passing valve pipe nipple is made of ontology, baffle ring, alloy hoop, small baffle ring, alloy sheath, sealing ring, piston, spring.It is other
Port valve pipe nipple axially offers main hydrophthalmia, sets a piston by spring pressure in main hydrophthalmia, and by-passing valve pipe nipple radially offers side
Through-hole, by-pass prot is in the zone of action of piston.
There are spring positioning step and baffle ring threaded hole step in ontology, spring and piston are mounted between two steps, can
With up and down, after piston centre blocks compression downlink, the by-pass prot on ontology is connected to body central hole, is blocked at center
In the case of realize bypass circulation.Piston centre is unimpeded when being remained stationary by spring supporting, by-pass prot and body central on ontology
Hole is isolated by piston, and mud can only carry out normal circulation by main hydrophthalmia.
By-passing valve pipe nipple, ontology use the preferable 4145H drill collar steel of comprehensive performance, and erosive wear resistance is good, and outer diameter has Φ
Three kinds of 178mm (7 inches), Φ 165mm (6.5 inches), Φ 120mm (4.75 inches) specifications.This body side surface is provided with 2 leak stopping materials
Stream leads to the by-pass prot of annular space, and the mosaic mode of alloy sheath is pushed down using small baffle ring, and resistance to erosion, the service life is long, and Yi Genghuan has Φ
Tri- kinds of 23.5mm, Φ 22.3mm, Φ 17mm specifications.Center piston ball seat is the hard alloy inlayed, and ball seat inner cone pore structure has
Conducive to the closure and disengagement of pitching, be conducive to mud overcurrent, reduce the flow resistance of mud, there is Φ 57mm, two kinds of Φ 50mm rule
Lattice.
2. salvaging type pitching includes fishing head, wiper block, pitching, the dimensional standard of pitching is that can seal ball seat hole
It is stifled, there are two kinds of Φ 63mm, Φ 53mm specifications, four wiper block circumference uniform distributions guarantee pitching to positive ball seat hole.It is closed using TC4 titanium
Golden material has lower density and good comprehensive mechanical performance.
3. be made of from floating fisher fishing head, buoyant cabin, fisher, fisher guide shoe, fisher at work with beat
Fishing head connection in fishing formula pitching, pitching is salvaged from by-passing valve pipe nipple ball seat hole and is taken out from floating.
Buoyant cabin is process by carbon fibre material, has lower density and higher bearing capacity, there are two types of specification,
Outer diameter isThere are thread, compression strength 75MPa, 65MPa in both ends.Fishing spear by nylon process and
At buffer is process by aluminum alloy materials, and selected materials all have lower density, using thin-walled hollow structure, is guaranteed
There is enough buoyancy under compression environment.
Technological highlights of the invention are:
1. pitching completes the opening and closing of by-pass prot, main hydrophthalmia by pump pressure by the way of mechanical pitching, according to
Pitching is brought back into ground by buoyancy, can be repeatedly used in the case where not pulling out of hole, the tool construction is simple, uses spirit
Living, safe ready.
2. being suitable for a variety of various forms of leak stopping such as pressurization sealing, quiet using bypass leak stopping in the case where not pulling out of hole
The only multiple means such as leak stopping.
3. a variety of downhole instruments such as protection underground rotary steering, vertically-guided, MWD, the screw rods that can be imitated using bypass leak stopping
Device and tool.
4. because its with larger smooth hydrophthalmia can complete occur bit freezing after MWD sit keyed instrument salvage and instrument hair
Maintenance is salvaged after raw failure and is launched, it is ensured that the safe handling of wireless drilling instrument.
Detailed description of the invention
Attached drawing is only used for showing the purpose of specific embodiment, and is not to be construed as limiting the invention, in entire attached drawing
In, identical symbol indicates identical component.
Fig. 1 is the structural schematic diagram of by-passing valve pipe nipple in this system；
Fig. 2 is the structural schematic diagram of salvaging type pitching in this system；
Fig. 3 is in this system from the structural schematic diagram of floating fisher.
Specific embodiment
The present invention is described in detail below with reference to the accompanying drawings and embodiments, but those skilled in the art should know
Road, following embodiment is not the unique restriction made to technical solution of the present invention, all in technical solution of the present invention Spirit Essence
Lower done any equivalents or change, are regarded as belonging to the scope of protection of the present invention.
The present invention provides a kind of reused ZFD type leak stopping system, when leakage occurring suitable for drilling process, no
It pulls out of hole and carries out plugging operations.The system includes three parts: by-passing valve pipe nipple, salvaging type pitching, certainly floating fisher, by-passing valve pipe nipple
It is underground leak stoppage tool, it, can unlimited number of progress pitching plugging operations using salvageable pitching.
By-passing valve pipe nipple is constituted as shown in Figure 1, including nipple body 11, baffle ring 12, alloy hoop 13, small baffle ring 14, alloy
Cover 15, sealing ring 16, piston 17, spring 18.
Nipple body 11 is axial to have center flowing hole, is equipped with baffle ring 12 at first step in the flowing hole of center, the
Spring 18 is placed at two steps；Piston 17 is located between baffle ring 12 and spring 18, under force can be in center overcurrent
It is moved in hole.Baffle ring 12 is for blocking piston 17.
Tip inside of the piston 17 close to 12 this one end of baffle ring is provided with alloy hoop 13, is conducive to mud overcurrent, and hardness is high,
Erosion resistance.When in salvaging type pitching investment center flowing hole, touching is alloy hoop 13 rather than piston 17.
Sealing ring 16 is set on the outside of piston 17, for the sealing between nipple body 11.
By-pass prot is radially offered in nipple body 11, small baffle ring 14 and alloy sheath 15 are installed in by-pass prot, is used
Mosaic texture enhances by-pass prot resistance to erosion ability.The corresponding installation site in piston 17 in the position of by-pass prot, passes through piston
Change in location realizes opening or closing for by-pass prot.
The composition of salvaging type pitching is as shown in Fig. 2, include fishing head 21, wiper block 22, pitching 23；Fishing head is used for and oneself
Floating fisher connection；Wiper block 22 plays righting to total, and pitching 23 is enable to can smoothly enter into by-passing valve pipe nipple
Center flowing hole in；Pitching 23, for blocking the center flowing hole of by-passing valve pipe nipple, is realized when launching by launching pitching
The closure of center flowing hole is taken out after salvaging.
From the composition of floating fisher as shown in figure 3, including fishing head 31, buoyant cabin 32, fisher 33, fisher guide shoe
34.Fishing head 31 is connect with buoyant cabin 32, is salvaged on well；Buoyant cabin 32 has more piece monomer composition, is successively linked in sequence, always
It is long (at least to use 6 sections) depending on buoyancy needs)；The other end of buoyant cabin 32 connects fisher 33, and the reconnection of fisher 33 is beaten
Device guide shoe 34 is fished out, fisher 33 is used to connect the fishing head 21 in salvaging type pitching.
Claims (5)
1. tool ZFD type leak stopping system of the invention meets our requirement, which is able to solve underground and mud leakage occurs
It loses, by mechanical pitching, by-pass prot is opened under the action of pump pressure, realizes static leak stopping, pressurization sealing or other means
Leak stopping, after leak stopping terminates termination of pumping, be pumped into and take pitching after floating from floating fisher and take out, realize that bypass bore closure, main hydrophthalmia are beaten
Open the normal drilling of recovery.After complicated bit freezing occurs for underground, keyed MWD instrument will be sat at any time using wired drilling winch from shaft bottom
It salvages and, it is ensured that the safe handling of instrument, the seat keyed MWD instrument after can also breaking down carry out salvaging maintenance and throwing
It is put into shaft bottom, one time can be reduced in this way and made a trip.In addition bypass leak stopping can be effectively protected underground rotary steering, vertically lead
To, a variety of downhole instruments and the tool such as MWD, screw rod.Deviational survey can also be carried out by its hydrophthalmia or other accident is handled.
It is characterized by: ZFD type leak stopping system is mainly made of three parts: by-passing valve pipe nipple, salvaging type pitching are salvaged from floating
Device.
(1) by-passing valve pipe nipple is made of ontology, baffle ring, alloy hoop, small baffle ring, alloy sheath, sealing ring, piston, spring.By-passing valve
Pipe nipple axially offers main hydrophthalmia, sets a piston by spring pressure in main hydrophthalmia, and by-passing valve pipe nipple radially offers by-pass prot,
By-pass prot is in the zone of action of piston.
Have spring positioning step and baffle ring threaded hole step in ontology, spring and piston are mounted between two steps, can more than
Lower activity, after piston centre blocks compression downlink, the by-pass prot on ontology is connected to body central hole, the case where center blocks
Lower realization bypass circulation.Piston centre is unimpeded when being remained stationary by spring supporting, by-pass prot and body central hole quilt on ontology
Piston isolation, mud can only carry out normal circulation by main hydrophthalmia.
By-passing valve pipe nipple, ontology use the preferable 4145H drill collar steel of comprehensive performance, and erosive wear resistance is good, and outer diameter has Φ 178mm (7
Inch), three kinds of Φ 165mm (6.5 inches), Φ 120mm (4.75 inches) specifications.This body side surface is provided with 2 plugging material circulations
To the by-pass prot of annular space, the mosaic mode of alloy sheath is pushed down using small baffle ring, resistance to erosion, the service life is long, and Yi Genghuan has Φ
Tri- kinds of 23.5mm, Φ 22.3mm, Φ 17mm specifications.Center piston ball seat is the hard alloy inlayed, and ball seat inner cone pore structure has
Conducive to the closure and disengagement of pitching, be conducive to mud overcurrent, reduce the flow resistance of mud, there is Φ 57mm, two kinds of Φ 50mm rule
Lattice.
(2) salvaging type pitching includes fishing head, wiper block, pitching, and the dimensional standard of pitching is that can block ball seat hole, is had
Two kinds of Φ 63mm, Φ 53mm specifications, four wiper block circumference uniform distributions guarantee pitching to positive ball seat hole.Using TC4 titanium alloy material
Material has lower density and good comprehensive mechanical performance.
(3) be made of from floating fisher fishing head, buoyant cabin, fisher, fisher guide shoe, fisher at work with salvaging type
Fishing head connection in pitching, pitching is salvaged from by-passing valve pipe nipple ball seat hole and is taken out from floating.
Buoyant cabin is process by carbon fibre material, has lower density and higher bearing capacity, and there are two types of specification, outer diameters
ForThere are thread, compression strength 75MPa, 65MPa in both ends.Fishing spear is process by nylon,
Buffer is process by aluminum alloy materials, and selected materials all have lower density, using thin-walled hollow structure, guarantees to be pressurized
There is enough buoyancy under environment.
2. structure, material and the specification of ZFD type leak stopping system according to claim 1, it is characterised in that: ZFD type leak stopping
System is mainly made of three parts: by-passing valve pipe nipple, salvaging type pitching, certainly floating fisher.
(1) by-passing valve pipe nipple is made of ontology, baffle ring, alloy hoop, small baffle ring, alloy sheath, sealing ring, piston, spring.By-passing valve
Pipe nipple axially offers main hydrophthalmia, sets a piston by spring pressure in main hydrophthalmia, and by-passing valve pipe nipple radially offers by-pass prot,
By-pass prot is in the zone of action of piston.
Have spring positioning step and baffle ring threaded hole step in ontology, spring and piston are mounted between two steps, can more than
Lower activity, after piston centre blocks compression downlink, the by-pass prot on ontology is connected to body central hole, the case where center blocks
Lower realization bypass circulation.Piston centre is unimpeded when being remained stationary by spring supporting, by-pass prot and body central hole quilt on ontology
Piston isolation, mud can only carry out normal circulation by main hydrophthalmia.
By-passing valve pipe nipple, ontology use the preferable 4145H drill collar steel of comprehensive performance, and erosive wear resistance is good, and outer diameter has Φ 178mm (7
Inch), three kinds of Φ 165mm (6.5 inches), Φ 120mm (4.75 inches) specifications.This body side surface is provided with 2 plugging material circulations
To the by-pass prot of annular space, the mosaic mode of alloy sheath is pushed down using small baffle ring, resistance to erosion, the service life is long, and Yi Genghuan has Φ
Tri- kinds of 23.5mm, Φ 22.3mm, Φ 17mm specifications.Center piston ball seat is the hard alloy inlayed, and ball seat inner cone pore structure has
Conducive to the closure and disengagement of pitching, be conducive to mud overcurrent, reduce the flow resistance of mud, there is Φ 57mm, two kinds of Φ 50mm rule
Lattice.
(2) salvaging type pitching includes fishing head, wiper block, pitching, and the dimensional standard of pitching is that can block ball seat hole, is had
Two kinds of Φ 63mm, Φ 53mm specifications, four wiper block circumference uniform distributions guarantee pitching to positive ball seat hole.Using TC4 titanium alloy material
Material has lower density and good comprehensive mechanical performance.
(3) be made of from floating fisher fishing head, buoyant cabin, fisher, fisher guide shoe, fisher at work with salvaging type
Fishing head connection in pitching, pitching is salvaged from by-passing valve pipe nipple ball seat hole and is taken out from floating.
Buoyant cabin is process by carbon fibre material, has lower density and higher bearing capacity, and there are two types of specification, outer diameters
ForThere are thread, compression strength 75MPa, 65MPa in both ends.Fishing spear is process by nylon,
Buffer is process by aluminum alloy materials, and selected materials all have lower density, using thin-walled hollow structure, guarantees to be pressurized
There is enough buoyancy under environment.
3. the working principle of ZFD type leak stopping system according to claim 1.It is characterized in that: it is a kind of leak stopping of bypass,
By pump pressure, by the way of mechanical pitching come complete main hydrophthalmia closing and by-pass prot opening.It is launched after leakage occurs
Salvaging type pitching, pitching can reach ball seat position and block the main hydrophthalmia of ball seat, and ball seat downlink is pushed under the action of pump pressure, is arrived
Up to after certain position, by-pass prot can be opened, and the annular space that the slurry of leak stopping at this time can enter open hole well by by-pass prot is realized static stifled
The leak stopping of leakage, pressurization sealing or other means.After leak stopping terminates termination of pumping, ball seat pushes ball seat uplink to close under the action of the spring
By-pass prot, main hydrophthalmia is blocked in pitching prevents leak stopping slurry from entering down-hole equipment.After the completion of leak stopping slurry rinses, pass through certainly floating fisher
Pitching is salvaged, well head is floated to by buoyancy and takes out, to open main hydrophthalmia, this completes entire Process of Leaking Stoppage, restore
Normal drilling.
4. the mode of operation method of ZFD type leak stopping system according to claim 1.It is characterized in that:
(1) preparation before carrying out leak stopping chooses matched pitching according to the internal diameter of main hydrophthalmia pitching seat, in detail
Inspection salvaging type pitching wiper block, fishing head and pitching, guarantee without bump injury.
(2) fishing spear, fisher, every piece buoyant cabin of the detailed inspection from floating fisher, it is ensured that intact flawless and scuffing.According to
The quantity of buoyant cabin is determined according to the density of mud, cannot at least be less than 6.
(3) it is assembled on ground and connects each buoyant cabin, fishing spear, the fisher from floating fisher, it is ensured that each interconnecting piece
The fastening of position.
(4) it dismantles kelly bar and puts into salvaging type pitching from well head drilling tool water hole, then link closely in well head connection kelly bar, with original
Mud turn on pump conveys salvaging type pitching to shaft bottom.It is required that engineers and technicians accurately calculate and beat according to discharge capacity and drilling tool volume
Fishing formula pitching reaches the time of main hydrophthalmia ball seat hole site, and discharge capacity is adjusted when calculating time 3/4ths and is lower than 14L/S, is reduced
Shock of the pitching to ball seat.After entering seat to calculating time pitching, it can be pumped into leak stopping slurry, pump pressure is utilized to open by-pass prot.At this time
The annular space that leak stopping slurry can enter open hole eye by by-pass prot realizes the leak stopping for carrying out static leak stopping, pressurization sealing or other means.
(5) if it is pressurization sealing, blowout preventer is closed at this time, leak stopping slurry (4L/S discharge capacity) is slowly pumped into small displacement, by several times slowly
Be pumped into, by calculate, after all plugging materials fully enter drop ply well section annular space casing pressure stabilization does not drop, illustrate leak stopping at
Function.
(6) blowout preventer is opened at this time, is continued remaining plugging material in the turn on pump circulation clean drilling rod of thorough cleaning, is prevented main hydrophthalmia from beating
Enter in instrument, screw rod or other drilling tools after opening.
(7) ball seat pushes ball seat uplink to close by-pass prot under the action of the spring after termination of pumping.Kelly bar is dismantled, it will be from floating fisher
It is put into from well head drilling tool water hole, has 1-2 meters of floating drum at this time and leak out well head, it is tight in well head connection kelly bar after floating drum is depressed
Button, it is desirable that more people's cooperations prevent from scraping disconnected buoyant cabin.
(8) engineers and technicians is accurately calculated according to discharge capacity and drilling tool volume reached from floating fisher bypass hole site when
Between, discharge capacity is adjusted when calculating time 3/4ths and is lower than 34L/S, is reduced from hitting between floating fisher and salvaging type pitching
It hits.It more than termination of pumping after the calculating time, drives pitching to float from floating fisher, opens main hydrophthalmia, to complete to bypass bore closure, master
The whole process that hydrophthalmia is opened.
(9) well head is floated to (if taking pitching from floating fisher can also pass through when can not float using winch from floating fisher
The mode of wired salvaging is salvaged to ground).Come from floating fisher and salvaging type pitching from wellhead, restores normal and bore
Into.
(10) if you need to secondary or multiple leak stopping, method is same as above.Static leak stopping is fairly simple, is flexibly selected according to the feature of Underwell leakage
It selects.
It is salvaged and is launched 5. the seat keyed MWD instrument of ZFD type leak stopping system according to claim 1 can not pull out of hole
Function.It is characterized in that:
(1) when in down-hole equipment with ZFD type leak stopping system drilling after complex accident and bit freezing occurs, wired drilling is used
Winch can the wireless drilling instrument by underground with foldable type centralizer at any time salvage to ground, it is ensured that wireless drilling instrument
It uses safely (foldable type centralizer can pass through in main hydrophthalmia).
(2) in down-hole equipment with ZFD type leak stopping system drilling when, once wireless drilling instrument breaks down, with it is wired with
Bore winch is salvaged to ground repair replace after launch to underground and work on again, this salvaging dispensing technology is
It is very mature, so as to reduce by a trip time.
(3) when in down-hole equipment with ZFD type leak stopping system drilling, deviational survey or other things can also be carried out by its hydrophthalmia
Therefore it handles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711451636.8A CN109973046A (en) | 2017-12-27 | 2017-12-27 | ZFD type leak stopping system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711451636.8A CN109973046A (en) | 2017-12-27 | 2017-12-27 | ZFD type leak stopping system |
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| CN109973046A true CN109973046A (en) | 2019-07-05 |
Family
ID=67072624
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711451636.8A Pending CN109973046A (en) | 2017-12-27 | 2017-12-27 | ZFD type leak stopping system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115749671A (en) * | 2023-01-06 | 2023-03-07 | 中石化西南石油工程有限公司 | Constant-pressure trapping and leaking stoppage tool and method for drilling |
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| GB2358657A (en) * | 1997-07-28 | 2001-08-01 | Smith International | Bypass valve closing means |
| CN201031662Y (en) * | 2007-04-11 | 2008-03-05 | 中国石化集团中原石油勘探局钻井工程技术研究院 | Down-hole controllable type boring tool by-pass valve |
| CN103132936A (en) * | 2013-03-26 | 2013-06-05 | 天津立林螺杆机械有限公司 | Simple and easy bypass valve of after-used positive displacement motor |
| CN204299514U (en) * | 2014-08-11 | 2015-04-29 | 江阴东辰钻探设备有限公司 | A kind of by-pass valve of screwdrill |
| CN207499835U (en) * | 2017-11-24 | 2018-06-15 | 北京六合伟业科技股份有限公司 | A kind of reused leak stopping system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2358657A (en) * | 1997-07-28 | 2001-08-01 | Smith International | Bypass valve closing means |
| CN201031662Y (en) * | 2007-04-11 | 2008-03-05 | 中国石化集团中原石油勘探局钻井工程技术研究院 | Down-hole controllable type boring tool by-pass valve |
| CN103132936A (en) * | 2013-03-26 | 2013-06-05 | 天津立林螺杆机械有限公司 | Simple and easy bypass valve of after-used positive displacement motor |
| CN204299514U (en) * | 2014-08-11 | 2015-04-29 | 江阴东辰钻探设备有限公司 | A kind of by-pass valve of screwdrill |
| CN207499835U (en) * | 2017-11-24 | 2018-06-15 | 北京六合伟业科技股份有限公司 | A kind of reused leak stopping system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115749671A (en) * | 2023-01-06 | 2023-03-07 | 中石化西南石油工程有限公司 | Constant-pressure trapping and leaking stoppage tool and method for drilling |
| CN115749671B (en) * | 2023-01-06 | 2023-05-09 | 中石化西南石油工程有限公司 | Drilling constant-pressure trap plugging tool and plugging method |
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Application publication date: 20190705 |