CN208816102U - Water injection pipe string - Google Patents
Water injection pipe string Download PDFInfo
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- CN208816102U CN208816102U CN201821468052.1U CN201821468052U CN208816102U CN 208816102 U CN208816102 U CN 208816102U CN 201821468052 U CN201821468052 U CN 201821468052U CN 208816102 U CN208816102 U CN 208816102U
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- injection pipe
- water injection
- water
- pipe string
- connect
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Abstract
The utility model discloses a kind of water injection pipe strings, comprising: the first water injection pipe, hydraulic anchor, packer, the second water injection pipe, water filling sliding sleeve and water outlet tube head, the first water injection pipe and the second water injection pipe are flexible compound coiled tubing；The lower part of first water injection pipe is connect with hydraulic anchor, and the lower part of hydraulic anchor is connect with packer, and the lower part of packer is connect with the second water injection pipe, and the lower part of the second water injection pipe is connected with water filling sliding sleeve, and the lower part for filling the water sliding sleeve is connect with water outlet tube head.The first water injection pipe in the utility model is flexible compound coiled tubing, and therefore, the first water injection pipe is corrosion-resistant, long service life, and the length of the first water injection pipe can improve construction efficiency with long enough so as to avoid the process of more short tubes of connection.The anchor fluke of hydraulic anchor can during water filling clamping internal surface of sleeve pipe, provide anchorage force for water injection pipe string, prevent water injection pipe string from arbitrarily swinging, it is ensured that water filling is gone on smoothly.
Description
Technical field
The utility model relates to exploitation of oil-gas field fields, more specifically to a kind of water injection pipe string.
Background technique
It needs to fill the water by water injection pipe string to stratum during oil-gas mining.Traditional water injection pipe string is by more piece steel
The downhole tools such as oil pipe and packer composition.But steel oil pipe is perishable, it may occur that phenomena such as fouling, card pipe.Therefore, it adopts
Steel oil pipe is replaced with flexible compound coiled tubing.Flexible compound coiled tubing has the spies such as corrosion-resistant, non-scaling, service life length
Point.But the pipe string structure of flexible compound coiled tubing and packer how is designed, to simplify difficulty of construction, it is ensured that water filling
It goes on smoothly, is those skilled in the art's critical problem urgently to be resolved.
Utility model content
The purpose of the utility model is to provide a kind of water injection pipe strings, and the water injection pipe string is corrosion-resistant, long service life, construction party
Just, and it can ensure that is filled the water goes on smoothly.
In order to achieve the above objectives, the utility model the following technical schemes are provided:
A kind of water injection pipe string, comprising: the first water injection pipe, packer, the second water injection pipe, fills the water sliding sleeve and goes out at hydraulic anchor
Water pipe head, first water injection pipe and second water injection pipe are flexible compound coiled tubing；Under first water injection pipe
Portion is connect with the hydraulic anchor, and the lower part of the hydraulic anchor is connect with the packer, the lower part of the packer and described the
The connection of two water injection pipes, the lower part of second water injection pipe are connected with the water filling sliding sleeve, the lower part of the water filling sliding sleeve with it is described
It is discharged tube head connection.
Preferably, first water injection pipe includes sealant, anti-interior pressurized layer, tensile layer, critical external compressive resistance layer and external coating.
Preferably, the end of first water injection pipe is provided with end connector, the end connector include inner canister,
Outer sleeve and the pulling force locking layer between the inner canister and the outer sleeve, the end insertion of first water injection pipe
Between the inner canister and the outer sleeve, the pulling force locking layer is connect with the tensile layer of first water injection pipe, the end
The one end of portion's connector far from first water injection pipe is the tubing round thread with external connection.
Preferably, further include safety joint and third water injection pipe, the safety joint include the top connection axially connected and
Lower contact can relatively rotate between the top connection and the lower contact, the lower part of the top connection and first water injection pipe
Connection, the lower contact are connect with the top of the third water injection pipe, and third water injection pipe lower part is upper with the hydraulic anchor
Portion's connection, the top connection and the lower contact separate after pitching is suppressed.
Preferably, the third water injection pipe is metal tube.
Preferably, the anchor fluke surface of the hydraulic anchor is non-metallic material.
Preferably, the upper end of first water injection pipe is connected with adapter tube.
It can be seen from the above technical proposal that the water injection pipe string in the utility model successively includes the first water injection pipe, waterpower
Anchor, packer, the second water injection pipe, water filling sliding sleeve and water outlet tube head.The first water injection pipe and the second water filling in the utility model
Pipe is flexible compound coiled tubing, therefore, the first water injection pipe and the second water injection pipe is corrosion-resistant, long service life, and the first note
The length of water pipe can improve construction efficiency with long enough so as to avoid the process of more short tubes of connection.The anchor fluke of hydraulic anchor
Can during water filling clamping internal surface of sleeve pipe, provide anchorage force for water injection pipe string, prevent water injection pipe string from arbitrarily swinging and altering
It is dynamic.Packer setting makes target zone form enclosure space.Water filling sliding sleeve cooperates with packer realizes setting for packer.Wait set
After the completion, water filling sliding sleeve falls off, and water outlet tube head conducting, water flow is injected into target zone by water injection pipe string, to complete filled drive
Oily operation.
Detailed description of the invention
In order to illustrate more clearly of the scheme in the utility model embodiment, below will in embodiment describe required for make
Attached drawing is briefly described, it should be apparent that, the drawings in the following description are merely some embodiments of the present invention,
For those skilled in the art, without creative efforts, other be can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is the structural schematic diagram for the water injection pipe string that one specific embodiment of the utility model provides；
Fig. 2 is the connection schematic diagram of the first water injection pipe that one specific embodiment of the utility model provides and end connector.
Wherein, 1 it is adapter tube, 2 be the first water injection pipe, 3 be safety joint, 4 be third water injection pipe, 5 be hydraulic anchor, 6 is envelope
Every device, 7 be the second water injection pipe, 8 be water filling sliding sleeve, 9 be screen casing, 10 be silk plug, 11 be casing, 20 be end connector, 21 be
Outer sleeve, 22 be inner canister, 23 be pulling force locking layer, 24 be external connecting structure.
Specific embodiment
The utility model discloses a kind of water injection pipe strings, and the water injection pipe string is corrosion-resistant, and long service life is easy for construction, and
It can ensure that is filled the water goes on smoothly.
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are in the premise for not making creative work
Under all other embodiment obtained, fall within the protection scope of the utility model.
Water injection pipe string successively includes: the first water injection pipe 2, hydraulic anchor 5, packer 6, the second water injection pipe 7, water filling from top to bottom
Sliding sleeve 8 and water outlet tube head.Wherein, the first water injection pipe 2 and the second water injection pipe 7 are flexible compound coiled tubing.Flexible compound
Coiled tubing is corrosion-resistant, less scaling, long service life, in addition, flexible compound coiled tubing can be sufficiently long for one whole
Pipe, so just avoids the process connected between multistage short tube.The bottom of the first water injection pipe 2 is arranged in hydraulic anchor 5.Hydraulic anchor 5
It is arranged positioned at the top of packer 6, and close to packer 6.During water filling, when pore pressure force reaches certain value in the middle, water
The anchor fluke of power anchor 5 can stretch out, and be clamped on the inner wall of casing 11, be whole water injection pipe string, especially provide anchoring for packer 6
Power prevents water injection pipe string from arbitrarily swinging, it is ensured that water filling is gone on smoothly.Mesoporous refers to the inner cavity of entire water injection pipe string.Annular space is
The annular space formed between water injection pipe string and casing 11.Casing 11 is coated on the tubing string on well cavity wall.Preferably, by anchor
The surface of pawl is limited to non-metallic material, and the anchor fluke of non-metallic material is not only corrosion-resistant, and will not weigh casing 11 wounded.
Continue to fill the water into water injection pipe string and suppress, after middle pore pressure force reaches and sets pressure, the packing element of packer 6 is shunk,
The expansion of packing element outer diameter, is close to, realization is set, so that the upper space of packer 6 and lower space be kept apart with casing 11.Note
Neatly set 8 is located at the lower section of packer 6.The operating pressure of water filling sliding sleeve 8 sets pressure greater than packer 6.It is sat in packer 6
Before envelope, water filling sliding sleeve 8 is not acted, and the connection of water outlet tube head and water injection pipe string has been truncated in water filling sliding sleeve 8, is packer 6
Enclosure space is provided, is suppressed convenient for carrying out water filling to packer 6.After setting, continues to fill the water into water injection pipe string and suppress, work as pressure
When power reaches operating pressure, water filling sliding sleeve 8 falls off, and water outlet tube head is connected with water injection pipe string.Water flow is injected by water injection pipe string
Target zone, and layer provides closed space for the purpose of the setting of packer 6, to complete displacement of reservoir oil by filling water operation.The present embodiment
In water injection pipe string it is corrosion-resistant, long service life is easy for construction, and can ensure fill the water go on smoothly.
Being discharged tube head specifically may include screen casing 9 and the silk plug 10 for being installed on 9 bottom of screen casing.Have on the side wall of screen casing 9
There are multiple apopores, it can be ensured that the uniformity of water outlet.Silk plug 10 gets lodged in the bottom of screen casing 9, prevents water flow from flowing out from bottom.
First water injection pipe 2 is flexible compound coiled tubing, which specifically includes: sealant, it is anti-in
Pressurized layer, tensile layer, critical external compressive resistance layer and external coating.Sealant is usually located at the innermost layer of flexible compound coiled tubing, outsourcing
Coating is usually located at the outermost layer of flexible compound coiled tubing.The effect of sealant be by 2 tube body mesoporous of the first water injection pipe with
Gas and liquid outside tube body are isolated.When pore pressure force is greater than tube body external pressure in tube body, interior pressurized layer is resisted to bear mesoporous
Pressure protects tube body not by crushing.When tube body is by biggish axial tension, tensile layer plays the role of bearing pulling force.When
When tube body external pressure is greater than pore pressure force in tube body, critical external compressive resistance layer, which plays, bears external pressure feedback power, prevents tube body from flattening.
First water injection pipe 2 and external connection for convenience are provided with end connector 20 in the end of the first water injection pipe 2.
As shown in Fig. 2,2 medial end portions connector 20 of attached drawing and the first water injection pipe 2 are lateral arrangement, are to be vertically arranged in actual use.
End connector 20 includes inner canister 22, outer sleeve 21 and the pulling force locking layer between inner canister 22 and outer sleeve 21
23.The end of first water injection pipe 2 is inserted between inner canister 22 and outer sleeve 21, the pulling force between inner canister 22 and outer sleeve 21
Locking layer 23 and the tensile layer of the first water injection pipe 2 are connected as one, to make the first water injection pipe 2 that can bear and transmit enough drawings
Power, while good sealing performance is formed to the surfaces externally and internally of the first water injection pipe 2.Also there is external connection on end connector 20
Structure, the external connecting structure are preferably tubing round thread.First water injection pipe 2 is connect by end connector 20 and adapter tube 1 and safety
First 3 are threadedly coupled.It is threadedly coupled easy to disassemble, and is connected firmly.
Adapter tube 1 is connected to the top of the first water injection pipe 2 by end connector 20.Adapter tube 1 can be one, or
More, more piece-root grafting pipes 1 are sequentially threadedly coupled.Specifically adapter tube 1 can be designed according to the length of actually required water injection pipe string
Number.If the length of water injection pipe string is inadequate, a few piece-root grafting pipes 1 can be connect, so that it is guaranteed that water injection pipe string is lowered into finger more
Depthkeeping degree.In addition, rise pull out water injection pipe string when, too long adapter tube 1 can be laid down, so as to water filling after pulling up certain length
Pipe string implements strength tube drawing.Safety joint 3 includes the top connection and lower contact axially connected.It can phase between top connection and lower contact
To axial rotation.Top connection is threadedly coupled with the end connector 20 of the lower end of the first water injection pipe 2.Lower contact and third water injection pipe
4 upper end connection.The lower end of third water injection pipe 4 is connect with the upper end of hydraulic anchor 5.Since the upper lower contact of safety joint 3 can
It relatively rotates, therefore safety joint 3 can discharge the twisting resistance that the first water injection pipe 2 and third water injection pipe 4 occur in well, it is ensured that
The smooth progress of water filling.In addition, the top connection and lower contact in safety joint 3 in the present embodiment can divide when pitching is suppressed
From to make part and lower contact in water injection pipe string more than top connection are below to be partially separated out, consequently facilitating by water injection pipe
Part in string more than top connection proposes outside well.The material of third water injection pipe 4 is preferably metal.Metal pipe stiffness is compared with flexible compound
Coiled tubing is big, after the top connection of safety joint 3 and lower contact separation, under the third water injection pipe 4 of metal material can ensure
The position of connector is fixed, consequently facilitating fishing tool is docked with lower contact, it is ensured that salvage is gone on smoothly.
The method of tripping in water injection pipe string includes the following steps:
S1: the tripping in water injection pipe string into well.
S2: whether water injection pipe string can smoothly move down, if entering step S3；If it is not, filled the water to annular space or to mesoporous,
Repeat whether detection water injection pipe string can smoothly move down later.
In this step, if it is observed that buoyancy suffered by water injection pipe string is bigger than normal, water injection pipe string can not be moved down, then just to
The mesoporous of water injection pipe string fills the water；If it is observed that the suspending weight of the water injection pipe string tripping in less than normal of buoyancy suffered by water injection pipe string is bigger than normal, that
The annulus water injection just formed to casing 11 and water injection pipe string, to ensure water injection pipe string G.I.H in preset speed.
S3: water injection pipe string is lowered into designated depth.
S4: in the top connecting tubes 1 of water injection pipe string, down tube depth is finely tuned.
The length of possible water injection pipe string falls short of, and water injection pipe string can not be lowered into specified depth, then just in the first note
The top connecting tubes 1 of water pipe 2, so that water injection pipe string be made to be lowered into designated depth.
S5: suppressing to mesoporous water filling, and 5 anchor fluke of hydraulic anchor stretches out and be close to internal surface of sleeve pipe, realizes anchoring.
In this step, it is filled the water into the mesoporous of water injection pipe string, when the pressure in mesoporous reaches the operating pressure of hydraulic anchor 5
When, the anchor fluke of hydraulic anchor 5 will stretch out.The operating pressure of hydraulic anchor 5 sets pressure less than packer 6.
S6: continuing water filling and suppress, and the realization of packer 6 is set.
Continue to fill the water into water injection pipe string after hydraulic anchor 5 realizes anchoring, when the middle pore pressure force of water injection pipe string reaches packing
Device 6 set pressure after, set pin and cut, set plunger shaft and be connected to mesoporous, water inflow set in plunger shaft, push sit
Envelope plunger shaft uplink extruding sets packing element, sets packing element and shrinks while being radially expanded, is adjacent to 11 inner wall of casing, realization is set.
When packer 6 is set, the upper and lower part space of packer 6 is mutually isolated, makes the target zone of lower part in enclosure space, from
And it is convenient for the progress of displacement of reservoir oil by filling water.
S7: continuing water filling and suppress, and water filling sliding sleeve 8 is opened, and water outlet tube head conducting is filled the water to target zone.
The operating pressure of water filling sliding sleeve 8 sets pressure greater than packer 6.After packer 6 is set, continue to water injection pipe
Water filling is suppressed in the mesoporous of string, and after the pressure of mesoporous reaches the operating pressure of water filling sliding sleeve 8, water filling sliding sleeve 8 falls off, outlet pipe
Head conducting, water flow are injected into target zone by being discharged tube head after mesoporous.
Using the method for the tripping in water injection pipe string in the utility model, it is specified deep can not only to ensure that water injection pipe string is lowered into
Degree, and can be such that packer 6 successfully realizes and set, for the purpose of layer creation enclosure space, convenient for the implementation of displacement of reservoir oil by filling water.
The method for pulling out water injection pipe string is acted to include the following steps:
T1: making adapter tube suspender connecting tubes, rises and pulls out water injection pipe string.
Adapter tube suspender connecting tubes 1 pull out.Adapter tube suspender generally includes crane, elevator, promotion short circuit etc..It is pulled out rising
During water injection pipe string, after water injection pipe string is extracted a segment length, can by extraction, the adapter tube 1 that rest on the ground tears open
Unload, the new adapter tube 1 positioned at beginning of rear tube suspender connection, aforesaid operations can be repeated later, connect until by all
Pipe 1, which rises, extracts ground.The adapter tube 1 of extraction is constantly laid down, the length of water injection pipe string can be constantly shortened, so convenient for adapter tube
Suspender exerts a force to water injection pipe string.
T2: whether packer 6 unseals, if so, entering step T3；If it is not, carrying out pitching to packer 6 suppresses deblocking.
There are two types of modes for the deblocking of packer 6.The first is upper lifting pipe post deblocking.Second is that deblocking is suppressed in pitching.On
It proposes tubing string deblocking namely above mentions water injection pipe string.It is upper mention water injection pipe string after, water injection pipe string can squeeze packer 6 set plunger shaft
Check valve, force check valve to be opened, then setting plunger shaft will be connected to mesoporous, set piston will downlink, set glue
Cylinder will axial elongation, separated with 11 inner wall of casing, realize deblocking.Deblocking is suppressed in pitching to be put into the mesoporous of water injection pipe string
Steel ball, thus make water injection pipe string steel ball above section and it is following be partially separated out, backward water injection pipe string in fill the water and suppress, when
After pressure reaches solution seal pressure, deblocking pin is cut, and deblocking sliding sleeve falls off, and is set plunger shaft and is connected with mesoporous, sets piston
Downlink sets packing element and separates with 11 inner wall of casing, realizes deblocking.
If rise pull out water injection pipe string when packer 6 be not unsealed, illustrate upper lifting pipe post deblocking do not succeed.So
The mode for taking pitching to suppress forces to unseal.
T3: continued to pull out.
After removing seal for packer, continue to pull out water injection pipe string.
T4: water injection pipe string lower part whether clamping stagnation, if it is not, water injection pipe string is extracted；If so, entering step T5.
If clamping stagnation does not occur in the lower part of water injection pipe string, pull out then water injection pipe is strung to ground.Rise pull out during,
Water injection pipe string pull out using two sets of suspenders.Pull out using adapter tube suspender connecting tubes first.To all adapter tubes 1
It rises after extracting ground, remaining water injection pipe string pull out using flexible pipe special hanger, flexible pipe special hanger being capable of side
It rises and pulls out, while water injection pipe string is wound in pipe dish.
T5: movable water injection pipe string, judge water injection pipe string lower part whether clamping stagnation, if it is not, water injection pipe string is extracted；If so, into
Enter step T6；
Movable water injection pipe string, for example water injection pipe string is above mentioned or transfers, water injection pipe string unfreezing may be made.
T6: carrying out pitching to safety joint 3 and suppress, and separates top connection and lower contact.
If clamping stagnation occurs in the lower part of water injection pipe string, water injection pipe string can not be pulled out.So with regard to safety joint 3 to be separated.
Pitching is carried out to safety joint 3 to suppress.Steel ball is put into water injection pipe string, steel ball is located between top connection and lower contact, to
After the pressure in the space on steel ball top reaches shear strength, top connection and lower contact separation.
T7: water injection pipe displacement is extracted in the part on top connection top.
T8: water injection pipe displacement is salvaged in the part of lower contact lower part.
Part of the water injection pipe displacement more than top connection includes the first water injection pipe 2 and adapter tube 1.Water injection pipe string 2 connects under being located at
Part below includes: the second water injection pipe 7, third water injection pipe 4, hydraulic anchor 5, packer 6 and water outlet tube head.Water injection pipe string
Part more than top connection is risen by lifting tool with joint and flexible pipe string special hanger pulls out to ground.Water injection pipe displacement connects under
Part below is salvaged by fishing tool.
The above description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (7)
1. a kind of water injection pipe string, comprising: the first water injection pipe (2), hydraulic anchor (5), packer (6), the second water injection pipe (7), water filling
Sliding sleeve (8) and water outlet tube head, which is characterized in that first water injection pipe (2) and second water injection pipe (7) are flexible answer
Close coiled tubing；The lower part of first water injection pipe (2) is connect with the hydraulic anchor (5), the lower part of the hydraulic anchor (5) and institute
Packer (6) connection is stated, the lower part of the packer (6) is connect with second water injection pipe (7), second water injection pipe (7)
Lower part be connected with the water filling sliding sleeve (8), the lower part of water filling sliding sleeve (8) is connect with the water outlet tube head.
2. water injection pipe string according to claim 1, which is characterized in that in first water injection pipe (2) includes sealant, is anti-
Pressurized layer, tensile layer, critical external compressive resistance layer and external coating.
3. water injection pipe string according to claim 2, which is characterized in that the end of first water injection pipe (2) is provided with end
Portion's connector (20), the end connector (20) include inner canister (22), outer sleeve (21) and be located at the inner canister
(22) inner core is inserted into the end of the pulling force locking layer (23) between the outer sleeve (21), first water injection pipe (2)
Between cylinder (22) and the outer sleeve (21), the pulling force locking layer (23) connect with the tensile layer of first water injection pipe (2),
The one end of the end connector (20) far from first water injection pipe (2) is the tubing round thread with external connection.
4. water injection pipe string according to claim 1, which is characterized in that further include safety joint (3) and third water injection pipe
(4), the safety joint (3) includes the top connection and lower contact axially connected, can between the top connection and the lower contact
It relatively rotates, the top connection is connect with the lower part of first water injection pipe (2), the lower contact and the third water injection pipe
(4) top connection, third water injection pipe (4) lower part connect with the top of the hydraulic anchor (5), the top connection and described
Lower contact separates after pitching is suppressed.
5. water injection pipe string according to claim 4, which is characterized in that the third water injection pipe (4) is metal tube.
6. water injection pipe string according to claim 1, which is characterized in that the anchor fluke surface of the hydraulic anchor (5) is nonmetallic
Material.
7. water injection pipe string according to claim 1, which is characterized in that the upper end of first water injection pipe (2), which is connected with, to be connect
It manages (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821468052.1U CN208816102U (en) | 2018-09-07 | 2018-09-07 | Water injection pipe string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821468052.1U CN208816102U (en) | 2018-09-07 | 2018-09-07 | Water injection pipe string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208816102U true CN208816102U (en) | 2019-05-03 |
Family
ID=66276371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821468052.1U Active CN208816102U (en) | 2018-09-07 | 2018-09-07 | Water injection pipe string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208816102U (en) |
-
2018
- 2018-09-07 CN CN201821468052.1U patent/CN208816102U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210312 Address after: 053000 North District of Hengde Industrial Park, Jingxian County, Hengshui City, Hebei Province Patentee after: Hebei Bozhuang flexible composite pipe Co.,Ltd. Address before: 053500 No.53, Erzhong North Road, Jing County, Hengshui City, Hebei Province Patentee before: HEBEI HENG AN TAI PIPELINE Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220627 Address after: 053000 1006, Zone C, Jingxian business city, Hengshui City, Hebei Province Patentee after: Hebei yongshuo Energy Engineering Technology Co.,Ltd. Address before: 053000 North District of Hengde Industrial Park, Jingxian County, Hengshui City, Hebei Province Patentee before: Hebei Bozhuang flexible composite pipe Co.,Ltd. |
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| TR01 | Transfer of patent right |