CN106812494A - Shaft bottom plugging device - Google Patents
Shaft bottom plugging device Download PDFInfo
- Publication number
- CN106812494A CN106812494A CN201510868056.3A CN201510868056A CN106812494A CN 106812494 A CN106812494 A CN 106812494A CN 201510868056 A CN201510868056 A CN 201510868056A CN 106812494 A CN106812494 A CN 106812494A
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- China
- Prior art keywords
- oil pipe
- oil
- packer
- pipe
- dropper
- Prior art date
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- 239000003129 oil well Substances 0.000 claims abstract description 36
- 238000012856 packing Methods 0.000 claims description 9
- 238000002955 isolation Methods 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 178
- 239000002253 acid Substances 0.000 description 27
- 239000000243 solution Substances 0.000 description 16
- 238000000034 method Methods 0.000 description 5
- 230000035699 permeability Effects 0.000 description 5
- 239000011435 rock Substances 0.000 description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 238000005065 mining Methods 0.000 description 3
- 230000020477 pH reduction Effects 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 241000269793 Cryothenia peninsulae Species 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 230000007017 scission Effects 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
- E21B33/12—Packers; Plugs
- E21B33/122—Multiple string packers
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The present invention provides a kind of shaft bottom plugging device, including the first oil pipe, casing packer, the 3rd oil pipe, dropper, the 4th oil pipe, open hole packer, the second oil pipe；Casing packer is used to set in the bottom of oil well middle sleeve section；Open hole packer is used to set in oil well above effective oil-yielding stratum of Open-Hole Section；The bottom of the first oil pipe connects with the top of casing packer；The top of dropper is connected by the 3rd oil pipe with the bottom of casing packer, and the bottom of dropper is connected by the 4th oil pipe with the top of open hole packer；The top of the second oil pipe is connected with open hole packer bottom, and the bottom of the second oil pipe is located in the middle of effective oil-yielding stratum.The present invention sets dropper between casing packer and open hole packer, after oil recovery terminates, dropper can directly be opened, the oil pipe on the upside of dropper is set to depart from dropper, dropper and open hole packer are pulled out in the lump by only needing a fishing tool matched with dropper, shortened the salvaging time, improve salvaging efficiency.
Description
Technical field
The present invention relates to technical field of petroleum extraction, more particularly to a kind of shaft bottom plugging device.
Background technology
In the completion practice of carbonate rock block, because limestone is dense, typically using bore hole
The mode of completion carries out completion, in the oil well of barefoot completion mode, is divided into from top to bottom in well
The length of casing section and Open-Hole Section, wherein Open-Hole Section is generally 100 meters to 600 meters, and effective
Oil-yielding stratum is then at 30 meters to 50 meters of Open-Hole Section bottom.Due to the non-average of carbonate reservoir
By force, it is necessary to carry out acid fracturing or acidification to effective oil-yielding stratum of Open-Hole Section before oil gas is exploited,
To improve oil-yielding stratum in-place permeability, in order that acid solution does not influence bore hole just for effective oil-yielding stratum
The other parts of section, it is general shaft bottom is insulated using open hole packer, then by oil pipe to naked
Eye packer downside injection acid solution, can carry out acid fracturing or acidifying transformation for effective oil-yielding stratum, and
And do not influence the other parts and sleeve portion of Open-Hole Section.
And after working as oil mining exhaustion, it is necessary to by the oil pipe in shaft bottom, open hole packer etc. all
Take out.The way of prior art is：Well head lifts oil pipe upwards, with the continuous increase of pulling force,
If bottom Open-Hole Section tubing string is buried, oil pipe may be pulled off (because oil pipe tensile value is low), then
The devices such as the oil pipe on the upside of breaking part are pulled out into oil well, oil pipe and the bore hole packing on the downside of breaking part
Device stays in underground, then enters fishing tool down again, and the device on the downside of breaking part is salvaged.
There is problems with prior art：Because there is uncertainty by buried depth degree in bottom oil pipe, if
Well head lifts tonnage misoperation, and the fracture position that may result in oil pipe has uncertainty, and
The position of fracture is different, and the method that may result in salvaging is different with outfit is salvaged, and makes salvaging
Complexity is also different.More than cause the salvaging time long, salvage efficiency low.
The content of the invention
The present invention provides a kind of shaft bottom plugging device, to overcome in the prior art to open hole packer
Salvage the defect that the cost time is long, salvaging is difficult.
A kind of shaft bottom plugging device that the present invention is provided, including the first oil for from top to bottom setting gradually
Pipe, casing packer, the 3rd oil pipe, dropper, the 4th oil pipe, open hole packer, the second oil
Pipe；
Described sleeve pipe packer is used to set in the bottom of oil well middle sleeve section, by oil well middle sleeve section
Space and oil well in Open-Hole Section isolation；
The open hole packer is used to set in oil well above effective oil-yielding stratum of Open-Hole Section；
The top of first oil pipe is located at well head, and bottom and the described sleeve pipe of first oil pipe are sealed
Connected every the top of device；
The top of the dropper is connected by the 3rd oil pipe with the bottom of described sleeve pipe packer, institute
The bottom for stating dropper is connected by the 4th oil pipe with the top of the open hole packer；
The top of second oil pipe connects with the bottom of the open hole packer, second oil pipe
Bottom be located at effective oil-yielding stratum in the middle of.
In one embodiment of this invention, it is also associated between the top and bottom of the 3rd oil pipe
Telescoping tube；
The telescoping tube can be axially retractable under external force, for compensate the 3rd oil pipe and
The stroke of the 4th oil pipe.
In one embodiment of this invention, the telescoping tube with the 3rd oil pipe by screw thread mode
Connection.
In one embodiment of this invention, the internal diameter of the internal diameter of the telescoping tube and the 3rd oil pipe
It is identical.
In one embodiment of this invention, first oil pipe, second oil pipe, the described 3rd
Oil pipe is identical with the internal diameter of the 4th oil pipe.
In one embodiment of this invention, the packing of the open hole packer is with diameter greater than described sleeve pipe
The packing diameter of packer.
In one embodiment of this invention, described sleeve pipe packer is hydraulic packer.
In one embodiment of this invention, the open hole packer is hydraulic packer.
In one embodiment of this invention, the dropper is grappling dropper.
Shaft bottom plugging device of the invention, wherein casing packer are used to set in oil well middle sleeve section
Bottom, completely cut off the Open-Hole Section in space and the oil well of oil well middle sleeve section, make the oil in exploitation
Gas can smoothly enter from the oil pipe of open hole packer bottom connection and travel up to well along oil pipe
Outward, and can avoid acidifying when open hole packer extremely deblocking cause acid solution sleeve pipe section, to set
Tube wall causes corrosion.The present invention is given up by being set between casing packer and open hole packer
Device, by the 3rd oil pipe and the 4th oil pipe by the two ends of dropper respectively with casing packer and bore hole
Packer is connected, and after oil-gas mining terminates, can directly control dropper to be opened, and makes to give up
Oil pipe on the upside of device departs from dropper, again respectively to casing packer and open hole packer after disengaging
Salvaged.Wherein, can directly by above carrying casing off by oil pipe for casing packer
All oil pipes on the upside of device and dropper are salvaged outside well.For dropper and open hole packer, by
Connected together with open hole packer in dropper, then only need to be by the salvaging work that matches with dropper
Tool is salvaged, and under the drilling rod that enters plus fishing tool intensity it is big, well head operation tonnage is big, can be by
Open hole packer and oil pipe on the downside of dropper and dropper are disposably salvaged outside well.So that
When being salvaged to downhole device, it is only necessary to complete by a fishing tool matched with dropper
The salvaging process of paired open hole packer, shortens the salvaging time, improves salvaging efficiency.And
The position of dropper can be arranged at the position of easy salvaging, so just can further improve and beat
Drag for efficiency.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will
The accompanying drawing to be used needed for embodiment or description of the prior art is briefly described, it is aobvious and easy
Insight, drawings in the following description are some embodiments of the present invention, for ordinary skill
For personnel, without having to pay creative labor, can also be obtained according to these accompanying drawings
Other accompanying drawings.
The structural representation of the shaft bottom plugging device embodiment one that Fig. 1 is provided for the present invention；
The structural representation of the shaft bottom plugging device embodiment two that Fig. 2 is provided for the present invention.
Description of reference numerals：
C1, casing section；
C2, Open-Hole Section；
1a, sleeve pipe；
1st, the first oil pipe；
2nd, casing packer；
3rd, open hole packer；
4th, dropper；
5th, the 3rd oil pipe；
6th, the 4th oil pipe；
7th, the second oil pipe；
8th, telescoping tube.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with
Accompanying drawing in the embodiment of the present invention, is carried out clear, complete to the technical scheme in the embodiment of the present invention
Ground description, it is clear that described embodiment is a part of embodiment of the invention, rather than whole
Embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation
Property work under the premise of the every other embodiment that is obtained, belong to the scope of protection of the invention.
In the completion practice of carbonate rock block, because limestone is dense, typically using bore hole
The mode of completion carries out completion, in the oil well of barefoot completion mode, is divided into from top to bottom in well
The length of casing section and Open-Hole Section, wherein Open-Hole Section is generally 100 meters to 600 meters, and effective
Oil-yielding stratum is then at 30 meters to 50 meters of Open-Hole Section bottom.Due to the non-average of carbonate reservoir
By force, it is necessary to carry out acid fracturing or acidification to effective oil-yielding stratum of Open-Hole Section before oil gas is exploited,
To improve oil-yielding stratum in-place permeability, in order that acid solution does not influence bore hole just for effective oil-yielding stratum
The other parts of section, it is general shaft bottom is insulated using open hole packer, then by oil pipe to naked
Eye packer downside injection acid solution, can carry out acid fracturing or acidifying transformation for effective oil-yielding stratum, and
And do not influence the other parts and sleeve portion of Open-Hole Section.
And after working as oil mining exhaustion, it is necessary to by the oil pipe in shaft bottom, open hole packer etc. all
Take out.The way of prior art is：Well head lifts oil pipe upwards, with the continuous increase of pulling force,
If bottom Open-Hole Section tubing string is buried, oil pipe may be pulled off (because oil pipe tensile value is low), then
The devices such as the oil pipe on the upside of breaking part are pulled out into oil well, oil pipe and the bore hole packing on the downside of breaking part
Device stays in underground, then enters fishing tool down again, and the device on the downside of breaking part is salvaged.
There is problems with prior art：Because there is uncertainty by buried depth degree in bottom oil pipe, if
Well head lifts tonnage misoperation, and the fracture position that may result in oil pipe has uncertainty, and
The position of fracture is different, and the method that may result in salvaging is different with outfit is salvaged, and makes salvaging
Complexity is also different.More than cause the salvaging time long, salvage efficiency low.
Based on the above mentioned problem that prior art is present, the present invention provides a kind of shaft bottom plugging device, uses
In solving the problems, such as to salvage that the cost time is long, salvage difficult to open hole packer in the prior art.
Specific implementation is as follows：
Embodiment one：
Referring to the drawings shown in 1, a kind of shaft bottom plugging device, shaft bottom closure are present embodiments provided
Device include from top to bottom set gradually the first oil pipe 1, casing packer 2, the 3rd oil pipe 5,
Dropper 4, the 4th oil pipe 6, open hole packer 3, the second oil pipe 7.
The shaft bottom plugging device of the present embodiment suitable for barefoot completion operation, in barefoot completion mode
Oil well in, casing section C1 and Open-Hole Section C2 is divided into well from top to bottom, it is to be exploited
Oil gas is located at the bottom of Open-Hole Section C2.Sleeve pipe 1a is fixed with the borehole wall of described sleeve pipe section C1.
Wherein, described sleeve pipe packer 2 is used to set in the bottom of oil well middle sleeve section C1, will
The space of oil well middle sleeve section C1 completely cuts off with the Open-Hole Section C2 in oil well.The open hole packer 3
For setting in oil well above effective oil-yielding stratum of Open-Hole Section C2.
Specifically, the top of the first oil pipe 1 is located at the pithead position of oil well, and the first oil pipe is stretched into
In sleeve pipe 1a on to oil well casing section, that is to say, that first oil pipe 1 is vertically arranged to set
In pipe 1a.
When actually used, first oil pipe 1 can typically reach 4000 meters to 6000 meters, its
Specifically formed by multiple oil distributing pipes are end to end successively, often connect an oil distributing pipe just by this point of oil
Pipe is extend into well, and with the not connection breaking of these oil distributing pipes, first oil pipe 11 just can be gradually
Extend to the shaft bottom direction of oil well.The specific length of the first oil pipe 1 and its specifically by how many
Oil distributing pipe constitute, can be according to actual job demand depending on, this is not limited by the present invention.
The bottom of first oil pipe 1 connects with the top of casing packer 2.The dropper 4
Top connected with the bottom of casing packer 2 by the 3rd oil pipe 5.That is, sleeve pipe is sealed
Every device 2 be opening for openend and the bottom of the first oil pipe 1 at the top of hollow structure, and the hollow structure
Mouth end matches, and the inside of casing packer 2 is connected with the first oil pipe 1, the hollow structure bottom
Openend match with the open top end of the 3rd oil pipe 5, make the inside of casing packer 2 and the
Three oil pipes 5 are connected, so as to also be connected between the first oil pipe 1 and the 3rd oil pipe 5.
The top of the dropper 4 is connected by the 3rd oil pipe 5 with the bottom of casing packer 2,
The bottom of dropper 4 is connected by the 4th oil pipe 6 with the top of open hole packer 3.That is,
Dropper 4 is hollow structure, and the openend at the top of the hollow structure is opened with the bottom of the 3rd oil pipe 5
Mouth end matches, and the 3rd oil pipe 5 is connected with the inside of dropper 4, the hollow structure bottom
Openend matches with the open top end of the 4th oil pipe 6, makes the 4th oil pipe 6 and dropper 4
Inside connection, so that the 3rd oil pipe 5 is also connected with the 4th oil pipe 6.
The top of the open hole packer 3 is connected by the 4th oil pipe 6 with the top of dropper 4,
The bottom of open hole packer 3 connects with the top of the second oil pipe 7, and the bottom of the second oil pipe 7 is located at
In effective oil-yielding stratum.That is, open hole packer 3 is hollow structure, hollow structure top
Openend match with the bottom of the 4th oil pipe 6, make the 4th oil pipe 6 with open hole packer 3
Inside connection, the openend of the hollow structure bottom matches with the top of the second oil pipe 7, so that
Also connected between 4th oil pipe 6 and the second oil pipe 7.
During actual job, in the oil well of barefoot completion mode, it is divided into from top to bottom in well
Casing section and Open-Hole Section.Wherein, sleeve pipe 1a is fixedly installed on the borehole wall of casing section C1, that is, is covered
The outer wall of pipe 1a and the borehole wall of casing section are fitted fixation by cement.The length of wherein Open-Hole Section is general
It is 100 meters to 600 meters, and effective oil-yielding stratum is generally 30 meters to 50 meters, and in naked
The lower end of eye section.I.e. the oil gas of Open-Hole Section bottom can be produced from Open-Hole Section, then by oil pipe certainly
Spray oil well.
In order to the oil gas that can make Open-Hole Section is entered into the second oil pipe 7 of Open-Hole Section, by that will cover
Pipe packer 2 is set in the bottom of sleeve pipe 1a so that sleeve pipe 1a inwalls and the outer wall of the first oil pipe 1
Between formed annular region and Open-Hole Section space mutually completely cut off, while making the space of Open-Hole Section C2
Connected with the first oil pipe 1.Oil gas in such Open-Hole Section can just smoothly enter the second oil pipe 7
In, then flowed up into in the first oil pipe 1 from the second oil pipe 7, oil well is finally sprayed,
Complete the exploitation of oil gas.
When oil gas is exploited, in order to improve oil-yielding stratum in-place permeability, then need before exploitation to naked
The oil-yielding stratum of eye section C2 carries out acid fracturing or acidifying reforming processing, and oil-yielding stratum is carried out acid fracturing or
During acidification, acid solution will be entered into the part in Open-Hole Section beyond effective oil-yielding stratum, to whole
Rock stratum in individual Open-Hole Section C2 carries out acid fracturing or acidifying, what influence Open-Hole Section acid fracturing or acidifying were transformed
Specific aim, and easily there is the phenomenon that collapses of Open-Hole Section C2.Therefore, by Open-Hole Section C2
Open hole packer 3 is set, Open-Hole Section C2 upper and lower two parts, effective oil entry can be divided into
In the bottom of bore hole pars infrasegmentalis point.When being acidified, acid solution is flowed downwardly into from the first oil pipe 1, when
Acid solution from oil pipe enter into Open-Hole Section when, due to the packing of open hole packer 3, acid solution is entered
Enter the Open-Hole Section part to the upside of open hole packer 3, acid solution is limited in effective oil-yielding stratum,
Specific aim acid fracturing or acidifying transformation are carried out to effective oil-yielding stratum, in-place permeability is improved, and then improve
Oil yield.
In addition, casing packer 2 is set as above also acted on safeguard protection, specially：When naked
Eye packer 3 is broken down, and for example abnormal mistake is honored as a queen, naked due to the presence of casing packer 2
The acid solution or stratum corrosive fluids of the downside of eye packer 3 will not then be sealed because of the mistake of open hole packer 3
And the annular region between sleeve pipe 1a inwalls and the first oil pipe 1, so as to avoid acid solution to set
The corrosion of pipe 1a.
The cooperation that the present embodiment passes through open hole packer 3 and casing packer 2, not only makes the oil gas can
Smoothly enter in oil pipe and sprayed from well head, and the acid solution is carried out for effective oil-yielding stratum
Acid fracturing or acidifying transformation, improve in-place permeability, it is ensured that the security of oil well.
After corresponding oil well exploits exhaustion, it is necessary to take out downhole device, prior art is
Oil pipe column is above carried in well head by external force, if well head operation tonnage is improper, oil pipe may be drawn
It is disconnected, then the oil pipe on the upside of breaking part is pulled out outside oil well, oil pipe and bore hole on the downside of breaking part
Packer stays in shaft bottom, then transfers fishing tool, and open hole packer is carried out by fishing tool
Salvage, due to cannot just judge the specific fracture position of oil pipe, and different cleavages under deep-well
The fishing tool and Refloatation method put are again different, and complexity is also different, cause to salvage bore hole envelope
It is very difficult when device, and during oil exploitation, the rock stratum on Open-Hole Section inwall may
Occur and collapse, open hole packer is buried, so can be more stranded when open hole packer is taken out
Difficulty, causes the salvaging time to spend length, salvages efficiency low.
The present embodiment in order to solve the problem, by open hole packer 3 and casing packer 2 it
Between dropper 4 is set, i.e., casing packer is connected with dropper by the 3rd oil pipe, by the
Four oil pipes connect open hole packer with dropper.When above carry tubing string can not by whole tubing strings and
When part pulls out oil well, open hole packer 3 and casing packer can at any time be made by dropper
2 disconnect at dropper position, that is to say, that after exploitation terminates, well mouth rotary oil pipe column
Can directly control dropper to be opened, make the top of dropper and connected 3rd oil pipe phase
Mutually disconnect, casing packer 2 and open hole packer 3 are salvaged respectively then：Above carry oil pipe
Post, under outside pulling force effect, casing packer 2 is unsealed, then with oil pipe by lifting to stone
Outside oil well, and because the position of dropper is it was determined that and between dropper and open hole packer be
Connection, therefore can be sealed dropper and bore hole by the fishing tool matched with the dropper
Oil well is salvaged in the lump every device, i.e., only need a fishing tool matched with dropper to be beaten
Drag for, and under the drilling rod that enters plus fishing tool intensity it is big, well head operation tonnage is big, can be by dropper
And the open hole packer and oil pipe on the downside of dropper are disposably salvaged outside well.Reduce salvaging work
The selection difficulty of tool, substantially reduces the salvaging time, improves efficiency of construction.And will can lose
The position of hand device is arranged at the position of easy salvaging, thus can further improve salvaging effect
Rate, shortens the salvaging time.
Further, due to there is no sleeve pipe in Open-Hole Section, the diameter of Open-Hole Section C2 in oil well
Rock stratum more than the diameter of casing section C1, and Open-Hole Section inwall can also come off, and so result in
The internal diameter of Open-Hole Section is more than the internal diameter of sleeve pipe, therefore when packer is selected, it is necessary to select phase
The packer matched somebody with somebody is separately positioned in sleeve pipe and in Open-Hole Section, i.e. the packing diameter of open hole packer 3
More than the packing diameter of casing packer 2.
Further, because in above-mentioned shaft bottom plugging device, the oil gas of exploitation can be passed sequentially through
Second oil pipe 7, the 4th oil pipe 6, the 3rd oil pipe 5 and the first oil pipe 1 flow out, and finally spray stone
Outside oil well, in order to oil gas can be reduced in the second oil pipe 7, the 4th oil pipe 6, the and of the 3rd oil pipe 5
The resistance flowed in first oil pipe 1, it is preferred that the second oil pipe 7, the oil of the 4th oil pipe the 6, the 3rd
Pipe 5 is identical with the internal diameter of the first oil pipe 1.
In the present embodiment, the first oil pipe 1, the second oil pipe 7, the 3rd oil pipe 5 and the 4th oil pipe 6
Internal diameter it is identical, such oil gas from the second oil pipe 7 successively to the 4th oil pipe 6, the 3rd oil pipe 5,
In flow process in first oil pipe 1, especially in the second oil pipe 7, the oil of the 4th oil pipe the 6, the 3rd
Link position between the oil pipe 14 of pipe 5 and first, due to the change without bore, is so subject to
Resistance with regard to very little, and then can just improve the oil yield efficiency of oil gas.
Specifically, the dropper 4 in the present embodiment can be grappling dropper, i.e. well mouth rotary pipe
Post is slipped out of the hand device.
In the present embodiment, described sleeve pipe packer 2 can select hydraulic packer.The bore hole
Packer 3 can select hydraulic packer.Certainly, in other embodiments, casing packer 2
Other packers can also be selected with open hole packer 3, can specifically be entered according to the environment of actual job
Row selection, the present invention is not limited thereto.
Embodiment two：
Casing packer 2 and open hole packer 3 in embodiment one are by the 3rd oil pipe 5, lose
The oil pipe 6 of hand device 4 and the 4th links together, i.e., casing packer 2 and open hole packer 3 it
Between connection to be rigidly connected, and casing packer 2 and open hole packer 3 are respectively necessary for carrying out
Set.And in acid fracturing or acidization and in follow-up oil recovery process, due to temperature change and oil pipe
Blow-up etc. influences, and the 3rd oil pipe and the 4th oil pipe are understood stress and elongated or shortened, and easily cause set
Pipe packer 2 or open hole packer 3 set defective tightness, or even cause abnormal deblocking, and then
Operation is caused to fail.
In order to solve the above problems, a kind of shaft bottom plugging device is present embodiments provided, in embodiment
On the basis of one, referring to the drawings shown in 2, the shaft bottom plugging device that Fig. 2 is provided for the present embodiment
Structural representation.
The present embodiment is with the difference of embodiment one：The centre of the 3rd oil pipe 5 is also added with stretching
The draw 8.
That is, telescoping tube 8 is connected between the top and bottom of the 3rd oil pipe 5, this stretches
Pipe 8 can be axially retractable under external force, for compensating the oil of the 3rd oil pipe 5 and the 4th
The stroke of pipe 6.That is, telescoping tube 8 is received for tubing string between two packers of compensation
What the tubing string after power was elongated or shortened.
In the present embodiment, the telescoping tube 8 is connected with the 3rd oil pipe 5 by screw thread mode,
And the internal diameter of the telescoping tube 8 is identical with the internal diameter of the 3rd oil pipe 5.
By adding telescoping tube 8 on the 3rd oil pipe 5, telescoping tube 8 in its axial direction can
Flexible, the connection between casing packer 2 and open hole packer 3 is just no longer rigidly connected, this
Sample due to not being rigidly connected between casing packer 2 and open hole packer 3, when setting, sleeve pipe
Will not also be influenced each other between packer 2 and open hole packer 3, and can compensated in acid fracturing or acid
Stroke during change and in follow-up oil recovery process on oil pipe axial direction, it is to avoid abnormal solution big envelope
Pipe packer or open hole packer.
Other technical characteristics are identical with embodiment one, and this is no longer going to repeat them.
In the technical scheme that the present embodiment is provided, by between casing packer and open hole packer
Dropper is set, dropper is connected with casing packer by the 3rd oil pipe, by the 4th oil pipe
Dropper is connected with open hole packer, after the completion of exploitation, can directly control dropper to open, will
Dropper is separated with the oil pipe on its top, and casing packer and open hole packer are beaten again then
Drag for, salvage extremely bore hole isolator etc. by the fishing tool that need to be only matched by one and dropper
Outside well, salvaging difficulty is reduced, shorten the salvaging time, improve efficiency of construction.
Simultaneously as the 3rd oil pipe and the 4th in acid fracturing or acidization and in follow-up oil recovery process
Oil pipe can stress and elongate or shorten, cause setting not for casing packer 2 or open hole packer 3
Reach closely, or even exception is unsealed, the present embodiment adds telescoping tube by the 3rd oil pipe 5
8, to compensate the change of the tubing string length after the 3rd oil pipe and the 4th oil pipe stress, so that
Ensure that the compactness that casing packer and open hole packer set, it is to avoid abnormal deblocking.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than
It is limited；Although being described in detail to the present invention with reference to foregoing embodiments, this area
Those of ordinary skill should be understood：It still can be to the technical side described in foregoing embodiments
Case is modified, or carries out equivalent to which part or all technical characteristic；And these
Modification is replaced, and the essence of appropriate technical solution is departed from various embodiments of the present invention technical side
The scope of case.
Claims (9)
1. a kind of shaft bottom plugging device, it is characterised in that including from top to bottom set gradually
One oil pipe, casing packer, the 3rd oil pipe, dropper, the 4th oil pipe, open hole packer,
Two oil pipes；
Described sleeve pipe packer is used to set in the bottom of oil well middle sleeve section, by oil well middle sleeve section
Space and oil well in Open-Hole Section isolation；
The open hole packer is used to set in oil well above effective oil-yielding stratum of Open-Hole Section；
The top of first oil pipe is located at well head, and bottom and the described sleeve pipe of first oil pipe are sealed
Connected every the top of device；
The top of the dropper is connected by the bottom of the 3rd oil pipe and described sleeve pipe packer
Logical, the bottom of the dropper is connected by the 4th oil pipe with the top of the open hole packer
It is logical；
The top of second oil pipe connects with the bottom of the open hole packer, second oil pipe
Bottom be located at effective oil-yielding stratum in the middle of.
2. shaft bottom plugging device according to claim 1, it is characterised in that the described 3rd
Telescoping tube is also associated between the top and bottom of oil pipe；
The telescoping tube can be axially retractable under external force, for compensate the 3rd oil pipe and
The stroke of the 4th oil pipe.
3. shaft bottom plugging device according to claim 2, it is characterised in that described flexible
Pipe is connected with the 3rd oil pipe by screw thread mode.
4. shaft bottom plugging device according to claim 3, it is characterised in that described flexible
The internal diameter of pipe is identical with the internal diameter of the 3rd oil pipe.
5. the shaft bottom plugging device according to any one of Claims 1-4, it is characterised in that
The internal diameter phase of first oil pipe, second oil pipe, the 3rd oil pipe and the 4th oil pipe
Together.
6. the shaft bottom plugging device according to any one of Claims 1-4, it is characterised in that
Packing diameter of the packing of the open hole packer with diameter greater than described sleeve pipe packer.
7. the shaft bottom plugging device according to any one of Claims 1-4, it is characterised in that
Described sleeve pipe packer is hydraulic packer.
8. the shaft bottom plugging device according to any one of Claims 1-4, it is characterised in that
The open hole packer is hydraulic packer.
9. the shaft bottom plugging device according to any one of Claims 1-4, it is characterised in that
The dropper is grappling dropper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510868056.3A CN106812494A (en) | 2015-12-01 | 2015-12-01 | Shaft bottom plugging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510868056.3A CN106812494A (en) | 2015-12-01 | 2015-12-01 | Shaft bottom plugging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106812494A true CN106812494A (en) | 2017-06-09 |
Family
ID=59108192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510868056.3A Pending CN106812494A (en) | 2015-12-01 | 2015-12-01 | Shaft bottom plugging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106812494A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2592635A (en) * | 2020-03-05 | 2021-09-08 | Ardyne Holdings Ltd | Improvements in or relating to wellbore operations |
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| US20030127223A1 (en) * | 2002-01-08 | 2003-07-10 | Branstetter Todd M. | Technique for sensing flow related parameters when using an electric submersible pumping system to produce a desired fluid |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2592635A (en) * | 2020-03-05 | 2021-09-08 | Ardyne Holdings Ltd | Improvements in or relating to wellbore operations |
| GB2592635B (en) * | 2020-03-05 | 2022-08-24 | Ardyne Holdings Ltd | Improvements in or relating to wellbore operations |
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Application publication date: 20170609 |
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