CN209129558U - A kind of efficient sand washing process tubing string - Google Patents
A kind of efficient sand washing process tubing string Download PDFInfo
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- CN209129558U CN209129558U CN201821921306.0U CN201821921306U CN209129558U CN 209129558 U CN209129558 U CN 209129558U CN 201821921306 U CN201821921306 U CN 201821921306U CN 209129558 U CN209129558 U CN 209129558U
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- tubing string
- sand washing
- washing process
- efficient sand
- process tubing
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Abstract
The utility model discloses a kind of efficient sand washing process tubing strings, mainly include shunt nipple, shunt packer, bimetallic tube, commutation flushing pipe nipple and spin rinse tool, the shunt nipple, shunting packer, bimetallic tube, pipe nipple is rinsed in commutation and spin rinse tool is sequentially connected and connects, and constitutes efficient sand washing process tubing string；The efficient sand washing process tubing string is two-layer pipe, it includes outer layer tubing string and internal layer tubing string, when use, efficient sand washing process tubing string is arranged in down-hole casing, first annular space is formed between the outer layer tubing string and down-hole casing of efficient sand washing process tubing string, the second annular space is formed between the outer layer tubing string and internal layer tubing string of efficient sand washing process tubing string, the inner space of the internal layer tubing string of efficient sand washing process tubing string constitutes central tube runner.For the big well of wastage, jet pump is put into central tube runner, certain negative pressure can be caused when sand cleaning fluid returns on central tube runner by jet pump, is achieved in negative pressure sand washing operation.
Description
Technical field
The utility model relates to a kind of sand washing process tubing strings, are to be related to needle in a kind of oilfield development process more specifically
To a kind of efficient sand washing process tubing string of sand washing operation.
Background technique
Completion cost can be effectively reduced in offshore oilfield generally uses at present well-case perforating, moderate leading technology, improve oil
Well capacity, but in oil well production process plugs oil discharge passage, makes since reservoir sand and fine grained are from stratum output
It gradually decreases at oil well productivity and even stops production, while underground equipment can be damaged and cause underground sand card accident, it is necessary to carry out sand washing work
Industry.
Sand washing mode mainly has forward circulation sand washing and recycled back sand washing two ways.Forward circulation sand washing impact force
Greatly, tubing string lower part can be easier to break up sand plug with sand flushing tools such as hydrodynamic force turbodrills, but annular space sectional area is made greatly
It is small at liquid stream upward velocity, it is unfavorable for taking sand, misoperation easily causes bit freezing.Liquid stream upward velocity is fast in reversed sand-flushing pipe column,
Conducive to taking sand, but annular flow is smaller to sand setting impact force, the not sand washings such as energy band hydrodynamic force turbodrill of sand-flushing pipe column lower part
Tool, sand washing risk is small, low efficiency.
In addition, due to exploiting for a long time, formation pressure gradually decreases in latter period of oilfield development, during causing sand washing operation
Sand cleaning fluid largely enters oil reservoir, polluted reservoir, and adjacent to oil well area penetrating power reduces, and influences oil well production.Conventional sand washing is made
The situation that industry can bring sand cleaning fluid largely to miss will cause certain pollution near wellbore formation.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, providing a kind of top is that reacting cycle, lower part are positive
The efficient sand washing process tubing string of circulation, and negative pressure sand washing operation may be implemented for the biggish well of formation leakage of sand washing section.
The utility model is achieved through the following technical solutions:
A kind of efficient sand washing process tubing string mainly includes shunt nipple, shunts packer, bimetallic tube, commutation flushing pipe nipple
With spin rinse tool, the shunt nipple shunts packer, bimetallic tube, commutation flushing pipe nipple and spin rinse tool successively
It is connected, constitutes efficient sand washing process tubing string；The efficient sand washing process tubing string is two-layer pipe comprising outer layer tubing string and interior
Layer tubing string, in use, efficiently sand washing process tubing string is arranged in down-hole casing, the outer layer tubing string and well of efficient sand washing process tubing string
First annular space is formed between setting of casing, forms the second ring between the outer layer tubing string and internal layer tubing string of efficient sand washing process tubing string
The inner space in shape space, the internal layer tubing string of efficient sand washing process tubing string constitutes central tube runner.
In the above-mentioned technical solutions, the shunt nipple, which has, to control in turn according to the pressure of liquid in central tube runner
Make first annular space and the second annular space whether the mechanical reversing mechanism of connection.That is, when the pressure of liquid in central tube runner
When power reaches design threshold, mechanical reversing mechanism starts to work and then controls first annular space and the second annular space as connection
Logical state.
In the above-mentioned technical solutions, it is described shunt that packer has can be according to the pressure of liquid in central tube runner in turn
Control the mechanical reversing mechanism that first annular space cycle channel opens and closes.That is, when the pressure of liquid in central tube runner
When reaching design threshold, mechanical reversing mechanism, which is started to work and then controlled, shunts packer open and close, shunts packer
When unlatching, the circulation canal in first annular space is closed, and when shunting packer closing, the circulation canal in first annular space is opened
It opens.
In the above-mentioned technical solutions, the bimetallic tube includes outer tube and inner tube, and outer layer tubing string is screwed connection, internal layer
Tubing string is insertion sealing structure.
In the above-mentioned technical solutions, the commutation is rinsed pipe nipple and is had for linking up the second annular space and central tube runner
Liquid commutating structure.
In the above-mentioned technical solutions, the spin rinse tool is connected to the tail end that pipe nipple is rinsed in the commutation.
In the above-mentioned technical solutions, which further includes jet pump, and the jet pump can be according to operation
It needs, in investment to central tube runner, realizes negative pressure sand washing operation using jet pump, reduce sand cleaning fluid leakage to stratum bring
Pollution.
It the advantages of the utility model and has the beneficial effect that
The utility model, first by fluid pressure in control centre's pipe runner, is opened and is shunted in conventional sand washing operation
Pipe nipple is connected to first annular space (being named as big annular space) and the second annular space (being named as small annular space)；It opens and shunts packing
Device cuts off at this circulation of big annular space up and down.Sand cleaning fluid is flowed by the big annular space of well head, and small annular space is entered at shunt nipple, then
Pipe nipple is rinsed via commutation and enters spin rinse mechanism, and sand washing operation, sand washing backlash are carried out to underground in the form of rotating jet
Sand liquid, which enters on commutation flushing pipe nipple inflow central tube runner, returns to well head.For sand washing operation, packer top is being shunted
Sand cleaning fluid is equivalent to reacting cycle flowing, is equivalent to direct circulation flowing, lower end direct circulation sand washing shunting packer lower part sand cleaning fluid
Sand washing efficiency is improved, while upper end also avoids sand setting in big inventionannulus flow bring sand card risk, effectively using reacting cycle
Ground combines direct circulation sand washing and the advantages of inverse circular sand washing adapter, has also evaded the defect of the two to a certain extent.
For the big well section of wastage, jet pump can be put into inside tubing string, using sand cleaning fluid on central tube runner
Negative pressure sand washing operation may be implemented in caused negative pressure when returning by jet pump, reduces sand cleaning fluid leakage and pollutes to stratum bring.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the tubing string of the utility model.
Wherein, 1: shunt nipple, 2: packer is shunted, 3: bimetallic tube, 4: jet pump, 5: commutate flushing pipe nipple, and 6: rotation
Flushing tool, 7: shaft bottom sand setting, 8: down-hole casing.
The structure chart of Fig. 2 shunt nipple.
The structure chart of Fig. 3 shunting packer.
The structure chart of Fig. 4 bimetallic tube.
It for those of ordinary skill in the art, without creative efforts, can be according to above attached
Figure obtains other relevant drawings.
Specific embodiment
In order to make those skilled in the art better understand the scheme of the utility model, combined with specific embodiments below into one
Step illustrates the technical solution of the utility model.
Referring to attached drawing, a kind of efficient sand washing process tubing string, mainly include shunt nipple 1, shunt packer 2, bimetallic tube 3,
Pipe nipple 5 and spin rinse tool 6 are rinsed in commutation, and the shunt nipple 1 shunts packer 2, bimetallic tube 3, commutation flushing pipe nipple 5
It is sequentially connected and connects with spin rinse tool 6, constitute efficient sand washing process tubing string.
The shunt nipple 1 shunts what packer 2, bimetallic tube 3, commutation flushing pipe nipple 5 and spin rinse tool 6 were constituted
Efficient sand washing process tubing string is two-layer pipe comprising outer layer tubing string and internal layer tubing string, in use, by efficient sand washing process pipe
Column is arranged in down-hole casing 8, and annular space between the outer layer tubing string and down-hole casing of efficient sand washing process tubing string is named as
Big annular space, annular space is named as small annular space, efficient sand washing between the outer layer tubing string and internal layer tubing string of efficient sand washing process tubing string
The inner space of the internal layer tubing string of process pipe string is named as central tube runner.
The shunt nipple 1 is " a kind of for the hydraulic of pipe cleaning sand washing process using Patent No. CN201610965703's
Controllable type tap ", with mechanical reversing mechanism, when the pressure of liquid in central tube runner reaches design threshold,
Mechanical reversing mechanism starts to work and then controls big annular space and small annular space as connection state.
" packing cup formula shunts packer " for shunting packer 2 and using Patent No. CN201610101217, when
When the pressure of liquid reaches design threshold in central tube runner, mechanical reversing mechanism starts to work and then controls packer and opens
With closing, when packer is opened, the circulation canal of big annular space is closed, and when packer is closed, the circulation canal of big annular space is opened.
The bimetallic tube 3 uses a kind of " bimetallic tube in sand washing process of Patent No. CN201610258533.9
Unit " comprising outer tube and inner tube, the top of bimetallic tube 3 are connect with packer 2 is shunted, the bottom end of bimetallic tube 3 and commutation
Pipe nipple 5 is rinsed to connect.
The commutation rinses pipe nipple 5 using " the bridge two-channel production connector system of Patent No. CN200920306250.2
System " plays the role of linking up small annular space and central tube runner with liquid commutating structure.
The spin rinse tool 6 uses a kind of " high-pressure rotary flushing work of Patent No. CN201420116773.1
Tool ", spin rinse tool 6 are connected to the tail portion that pipe nipple is rinsed in the commutation, and central tube runner flushing liquor flows through the spin rinse
It can be flowed out in the form of rotating jet when tool.
The efficient sand washing process tubing string further includes jet pump 4, and the jet pump 4 can be put into according to operation needs to center
In pipe runner, negative pressure sand washing operation is realized using jet pump 4, reduces sand cleaning fluid leakage and stratum bring is polluted.
In use, the efficient sand washing process tubing string of the utility model is transferred to down-hole casing 8, in the mistake of decentralization tubing string
Cheng Zhong, shunt nipple 1 is in the open state, and big annular space and small annular space are interconnected, and the leather cup for shunting packer 2 is in contraction-like
State, tubing string in place after, suppressed in tubing string to certain pressure, open and shunt 2 leather cup of packer, cut off at this following for big annular space up and down
Ring can carry out conventional sand washing operation at this time, and sand cleaning fluid is flowed by the big annular space of well head, and the small of bimetallic tube 3 is entered at shunt nipple 1
Annular space, then rinse pipe nipple 5 via commutation and enter central tube runner, and rinse down-hole casing 8 and shaft bottom in the form of rotating jet
Sand setting 7；Sand cleaning fluid rinses pipe nipple 5 from commutation through small annular space and flows into central tube runner, returns to well head upwards along heart pipe runner, so far
Complete conventional sand washing operation.
For the big well of wastage, after the decentralization in place of efficient sand washing process tubing string, by the investment of jet pump 4 to central tube stream
Inside road, sand washing operation can be carried out at this time, flushing liquor circulation canal is identical as above-mentioned conventional sand washing operation process, when sand cleaning fluid exists
It is returned on central tube runner by certain negative pressure can be caused when jet pump 4, is achieved in negative pressure sand washing operation.
Illustrative description has been done to the utility model above, it should explanation, in the core for not departing from the utility model
In the case where the heart, it is any it is simple deformation, modification or other skilled in the art can not spend creative work etc.
The protection scope of the utility model is each fallen with replacement.
Claims (7)
1. a kind of efficient sand washing process tubing string, it is characterised in that: including shunt nipple, shunt packer, bimetallic tube, commutation flushing
Pipe nipple and spin rinse tool, the shunt nipple shunt packer, bimetallic tube, commutation flushing pipe nipple and spin rinse tool
It is sequentially connected and connects, constitute efficient sand washing process tubing string；The efficient sand washing process tubing string is two-layer pipe comprising outer layer tubing string
With internal layer tubing string, in use, efficiently sand washing process tubing string be arranged in down-hole casing, the outer layer tubing string of efficient sand washing process tubing string
First annular space is formed between down-hole casing, and is formed between the outer layer tubing string and internal layer tubing string of efficient sand washing process tubing string
The inner space in second ring space, the internal layer tubing string of efficient sand washing process tubing string constitutes central tube runner.
2. a kind of efficient sand washing process tubing string according to claim 1, it is characterised in that: the shunt nipple has can
According to the pressure of liquid in central tube runner and then controls first annular space and the second annular space whether the machinery of connection changes
To mechanism.
3. a kind of efficient sand washing process tubing string according to claim 1, it is characterised in that: the shunting packer has energy
The enough pressure according to liquid in central tube runner controls the mechanical commutation that first annular space cycle channel opens and closes in turn
Mechanism.
4. a kind of efficient sand washing process tubing string according to claim 1, it is characterised in that: the bimetallic tube includes outer tube
And inner tube.
5. a kind of efficient sand washing process tubing string according to claim 1, it is characterised in that: pipe nipple is rinsed in the commutation to be had
For linking up the liquid commutating structure of the second annular space Yu central tube runner.
6. a kind of efficient sand washing process tubing string according to claim 1, it is characterised in that: the spin rinse tool connection
The tail end of pipe nipple is rinsed in the commutation.
7. a kind of efficient sand washing process tubing string according to claim 1, it is characterised in that: the efficient sand washing process tubing string is also
Including jet pump, the jet pump is put into central tube runner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821921306.0U CN209129558U (en) | 2018-11-20 | 2018-11-20 | A kind of efficient sand washing process tubing string |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821921306.0U CN209129558U (en) | 2018-11-20 | 2018-11-20 | A kind of efficient sand washing process tubing string |
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| CN209129558U true CN209129558U (en) | 2019-07-19 |
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| CN201821921306.0U Active CN209129558U (en) | 2018-11-20 | 2018-11-20 | A kind of efficient sand washing process tubing string |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566144A (en) * | 2019-09-27 | 2019-12-13 | 中石化石油工程技术服务有限公司 | Leakage-proof sand washing method and sand washing pipe column |
| CN112709604A (en) * | 2019-10-24 | 2021-04-27 | 中国石油天然气股份有限公司 | Device and method for removing residues and brine in salt cavern gas storage |
| CN115288625A (en) * | 2022-10-08 | 2022-11-04 | 廊坊开发区森德石油设备有限公司 | Sand washing and fishing equipment |
-
2018
- 2018-11-20 CN CN201821921306.0U patent/CN209129558U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566144A (en) * | 2019-09-27 | 2019-12-13 | 中石化石油工程技术服务有限公司 | Leakage-proof sand washing method and sand washing pipe column |
| CN110566144B (en) * | 2019-09-27 | 2021-08-17 | 中石化石油工程技术服务有限公司 | Leakage-proof sand washing method and sand washing pipe column |
| CN112709604A (en) * | 2019-10-24 | 2021-04-27 | 中国石油天然气股份有限公司 | Device and method for removing residues and brine in salt cavern gas storage |
| CN112709604B (en) * | 2019-10-24 | 2024-01-30 | 中国石油天然气股份有限公司 | Device and method for removing residues and brine in salt cavern gas storage |
| CN115288625A (en) * | 2022-10-08 | 2022-11-04 | 廊坊开发区森德石油设备有限公司 | Sand washing and fishing equipment |
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