CN106979003A - A kind of downhole instrument bypass type balanced structure - Google Patents
A kind of downhole instrument bypass type balanced structure Download PDFInfo
- Publication number
- CN106979003A CN106979003A CN201710333636.1A CN201710333636A CN106979003A CN 106979003 A CN106979003 A CN 106979003A CN 201710333636 A CN201710333636 A CN 201710333636A CN 106979003 A CN106979003 A CN 106979003A
- Authority
- CN
- China
- Prior art keywords
- main body
- balance
- piston assembly
- downhole instrument
- dummy piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
- E21B47/017—Protecting measuring instruments
Abstract
A kind of downhole instrument bypass type balanced structure, including balance main body are disclosed herein, and the side wall of the balance main body is provided with dummy piston assembly and the concave cavity for accommodating dummy piston assembly；The side of the dummy piston assembly is connected with extraneous mud column, and opposite side is connected with balancing the internal oil passages of main body, and the dummy piston assembly is used to balance the pressure between extraneous mud column and balance body interior oil circuit；The present invention can should can effectively overcome defect present in prior art, it is possible to increase service life in downhole instrument technical field using the present invention, can effectively ensure that the convenience of later maintenance operation.
Description
Technical field
The application relates to, but are not limited to downhole instrument, especially a kind of downhole instrument bypass type balanced structure.
Background technology
In the prior art, downhole instrument balanced structure using leather bag balanced structure or crosses wire type balanced structure mostly；Wherein,
Leather bag balanced structure mainly includes two ends sealing fixture and leather bag, and it passes through the hydraulic oil or balancing liquid of annular space inside leather bag
Corresponding balancing run is realized with the well liquid of annular space outside leather bag, above-mentioned leather bag balanced structure, which exists, to be had a disadvantage that：Use the longevity
Life is shorter and reliability is low.
Crossing wire type balanced structure mainly includes dummy piston, balance cylinder block, back-moving spring, oil level detecting device, and it passes through
The dummy piston of bascule, balance instrument internal hydraulic pressure oil or balancing liquid and the pressure of outside well liquid, and dummy piston
Moved in the position of balance cylinder block, can adapt to the hydraulic oil or balancing liquid inside apparatus in underground.With subsurface environment
Pressure, the change of temperature cause the Volume Changes of hydraulic oil or balancing liquid, when hydraulic oil or balancing liquid leakage occur for instrument
When, dummy piston displacement exceedes rational position, touches the travel switch action of oil level detecting device, reminds ground handling operator to enter
Row apparatus status, realizes balancing run.However, using wire type balanced structure exist have a disadvantage that：Maintenance amount
Greatly, maintenanceability is poor.
The content of the invention
The technical problem that the application is solved is to provide a kind of downhole instrument bypass type balanced structure, can effectively overcome existing
Defect present in technology, it is possible to increase service life, can effectively ensure that the convenience of later maintenance operation.
In order to solve the above technical problems, this application provides a kind of downhole instrument bypass type balanced structure, including balance master
Body,
The side wall of the balance main body is provided with dummy piston assembly and the inner cavity for accommodating dummy piston assembly
Body；The side of the dummy piston assembly is connected with extraneous mud column, and opposite side is connected with balancing the internal oil passages of main body, described
Dummy piston assembly is used to balance the pressure between extraneous mud column and balance body interior oil circuit.
Above-mentioned downhole instrument bypass type balanced structure, can also have following features,
The dummy piston assembly includes piston, the spring being connected with piston, the outer barrel on the outside of piston, the outer barrel
One end be provided with the first through hole that connect with extraneous mud column, opposite side is provided with balancing the second through hole that body interior is connected；
One end of the spring is fixed on outer barrel close to the end of first through hole, other end connection piston.
Above-mentioned downhole instrument bypass type balanced structure, can also have following features,
Clamping block is provided between the outer barrel and the balance main body.
Above-mentioned downhole instrument bypass type balanced structure, can also have following features,
The clamping block is arranged on the outer barrel between the end of first through hole and relative cavity end, the lock
Determining block is used to realize fixation of the dummy piston assembly in cavity.
Above-mentioned downhole instrument bypass type balanced structure, can also have following features,
The outer barrel and balance main body between be provided with adapter, the adapter be used for connect outer barrel the second through hole and
Balance the internal oil passages of main body.
Above-mentioned downhole instrument bypass type balanced structure, can also have following features,
The balance main body is by controlling circuit to be connected with ground control unit；
The dummy piston assembly also includes sensor, and the sensor is used for the oil for detecting the internal oil passages of balance main body
Amount, and by detection signal by controlling circuit to be sent to ground control unit, the ground control unit is used to be believed according to detection
Number, monitor the oil mass of internal oil passages.
Above-mentioned downhole instrument bypass type balanced structure, can also have following features,
The sensor is travel switch, and the travel switch is arranged on outer barrel at the position of the second through hole.
Above-mentioned downhole instrument bypass type balanced structure, can also have following features,
The inside of the balance main body is provided with eccentric cable-through hole, and the signal wire of control circuit is passed through after the eccentric cable-through hole
It is connected with ground control unit.
The application above-mentioned technical proposal has the advantages that：
The above-mentioned technical proposal that the present invention is provided, can be by the above-mentioned concave cavity being arranged in balance main body wall
Dummy piston assembly, realization very easily dismounts attended operation, and the concave cavity in balance main body wall is arranged at based on it,
It can directly be carried out in the side-wall outer side of balance main body, without main body whole dismounting will be balanced, actual operation can be effectively improved
Efficiency；It can ensure that balance body interior oil circuit pressure is slightly above mud column pressure all the time by spring setting, be conducive to
Ensure hydraulic system safety, reach the effect of balance.
Further, fixation of the dummy piston assembly in cavity can be realized by the setting of above-mentioned clamping block；Installed
The outer barrel of clamping block and dummy piston assembly, can be put at concave cavity, and clamping block is carried out into locking operation by Cheng Zhong, you can
Realize fixation of the dummy piston assembly in cavity；When needing dismounting, clamping block can be unlocked to operation, you can realize freely
Take out the operation of dummy piston assembly；By the setting of sensor, the oil of the internal oil passages of detection balance main body can be realized
Amount, in order to take corresponding measure to avoid the instrument heavy losses caused by oil starvation.
Further, can be by the setting of above-mentioned eccentric cable-through hole, using the teaching of the invention it is possible to provide all power supplys of balance body interior and
The threading passage of signal cable, can realize prompt disassembly and installation dummy piston assembly, in operation being capable of maximum limit
The attended operation of the reduction circuit of degree.
Other features and advantage will be illustrated in the following description, also, partly be become from specification
Obtain it is clear that or being understood by implementing the embodiment of the present invention.The purpose of the application and other advantages can be by explanations
Specifically noted structure is realized and obtained in book, claims and accompanying drawing.
Brief description of the drawings
Accompanying drawing is used for providing further understanding technical scheme, and constitutes a part for specification, with this
The embodiment of application is used for the technical scheme for explaining the application together, does not constitute the limitation to technical scheme.
Fig. 1 is the structural representation of the embodiment of the present invention.
Embodiment
Embodiments herein is described in detail below in conjunction with accompanying drawing.It should be noted that not conflicting
In the case of, the feature in embodiment and embodiment in the application can be mutually combined.
With reference to shown in Fig. 1,
The embodiments of the invention provide a kind of downhole instrument bypass type balanced structure, including balance main body 1, main body 1 is balanced
Side wall be provided with dummy piston assembly and the concave cavity for accommodating dummy piston assembly；The one of dummy piston assembly
Side is connected with extraneous mud column, and opposite side is connected with balancing the internal oil passages of main body 1, and dummy piston assembly is used to balance extraneous mud
Starch the pressure between post and the balance internal oil passages of main body 1.
In concrete operations, can by it is above-mentioned be arranged on balance the side wall of main body 1 on concave cavity in dummy piston assembly,
It can effectively ensure that the disassembling operations convenience of dummy piston assembly；Support and the company of instrument can be realized by above-mentioned balance body
Effect is connect, dummy piston assembly is arranged in the balance main body 1, plays a part of dynamic equilibrium；Above-mentioned balance main body 1 is applied to
In instrument, its connection supporting role between instrument top, instrument bottom can be realized by top connection 3, lower contact；Its
In, can be set between top connection 3 and balance main body 1 has quick to connection-peg 4.
In the prior art, balance main body 1 is thin and long units, and its dummy piston assembly used is installed in balance main body
1 inside, when dummy piston assembly needs dismounting attended operation, need to will balance the whole dismounting of main body 1, and then will could need
The dummy piston assembly of maintenance is taken out, and aforesaid operations are wasted time and energy, and seriously reduce actual production efficiency.By contrast, originally
Dummy piston assembly in the above-mentioned concave cavity being arranged on the balance side wall of main body 1 that application is proposed, then can realize very
Easily dismount attended operation, based on its be arranged at balance the side wall of main body 1 on concave cavity, when need dismount attended operation
When, it can directly carry out, without the whole dismounting of main body 1 will be balanced, can effectively improve actual in the side-wall outer side of balance main body 1
Operating efficiency.
Preferably, in concrete operations of the present invention, above-mentioned dummy piston assembly include piston 9, be connected with piston 9 spring 7,
Outer barrel 8 located at the outside of piston 9, one end of outer barrel 8 is provided with the first through hole 13 connect with extraneous mud column, opposite side provided with
Balance the second through hole 11 of the inside of main body 1 connection；One end of spring 7 is fixed on outer barrel 8 close to the end of first through hole 13, another
End connection piston 9.
In concrete operations, piston 9 is real in the presence of the pressure of outside mud column with the pressure of the balance internal oil passages of main body 1
Existing dynamic equilibrium；Meanwhile, in homeostasis process, spring 7 is in pressured state, that is to say, that the elastic force of spring 7 and outside mud
The pressure sum for starching post is equal to the pressure of the balance internal oil passages of main body 1；Therefore, in the presence of spring 7, above-mentioned dummy piston is total
Into ensure that balance main body 1 internal oil passages pressure is slightly above mud column pressure all the time, hydraulic system safety is advantageously ensured that, is reached
To the effect of balance.
It should be noted that during the balance unimplanted hydraulic oil of the internal oil passages of main body 1, piston 9 is in the presence of spring 7, position
In outer barrel 8 close to the end of the second through hole 11；When the balance internal oil passages of main body 1 are slowly injected into hydraulic oil, piston 9 is oily internally
In the presence of the pressure of road, overcome the elastic force of spring 7 and moved to the end of first through hole 13；When the position of piston 9 reaches default position
When putting, now the pressure of internal oil passages meets needs of production, i.e. piston 9 internal oil passages pressure is completed at the position on surface
With the dynamic equilibrium between extraneous mud column pressure；Wherein, balance main body 1 is provided with oil filler point and the note for blocking oil filler point
Oily plug 5.
Preferably, in concrete operations of the present invention, clamping block 6 is provided between above-mentioned outer barrel 8 and balance main body 1.
In concrete operations, above-mentioned clamping block 6 is arranged on outer barrel 8 close to the end of first through hole 13 and relative cavity end
Between, clamping block 6 is used to realize fixation of the dummy piston assembly in cavity；In installation process, clamping block 6 can be lived with balance
The outer barrel 8 of plug assembly is put at concave cavity, and clamping block 6 is carried out into locking operation, you can realize dummy piston assembly in chamber
Internal fixation；When needing dismounting, clamping block 6 can be unlocked operation, you can dummy piston assembly is freely taken out in realization
Operation.
Preferably, in concrete operations of the present invention, adapter 12, adapter 12 are provided between above-mentioned outer barrel 8 and balance main body 1
For connecting the second through hole 11 of outer barrel 8 and balancing the internal oil passages of main body 1.In concrete operations, above-mentioned adapter can be passed through
12, realize the oil communication between balance main body 1 and outer barrel 8.
Preferably, in concrete operations of the present invention, above-mentioned balance main body 1 is by controlling circuit to be connected with ground control unit；
Wherein, dummy piston assembly also includes sensor, and sensor is used for the oil mass for detecting the internal oil passages of balance main body 1, and will inspection
Signal is surveyed by controlling circuit to be sent to ground control unit, ground control unit is used to, according to detection signal, monitor interior oil
The oil mass on road.
In concrete operations, the sensor can be travel switch 10, and travel switch 10 is arranged on the inside of outer barrel 8 close to the
At the position of two through holes 11；By the setting of above-mentioned travel switch 10, current inside can be detected by the position of piston 9
Whether the oil mass of oil circuit meets job requirements.When the oil mass of internal oil passages meets operation needs, piston 9 now is oily internally
Under the pressure effect on road, the centre position of the through hole 11 of first through hole 13 and second is stable at；When the oil mass of internal oil passages is reduced,
Piston 9 is under the pressure and elastic force operation of extraneous mud column, slowly close to the second through hole 11, when piston 9 is touched positioned at second
During travel switch 10 near through hole 11, show that the oil mass of now internal oil passages is in oil starvation state, the contacting travel of piston 9 switch
After 10, travel switch 10 sends signal by controlling circuit to be conveyed to ground control unit；Ground control unit passes through the detection
Signal, can timely detect the oil mass state of current internal oil passages, in order to take corresponding measure to avoid because of oil starvation
Caused instrument heavy losses.
Preferably, in concrete operations of the present invention, the inside of above-mentioned balance main body 1 is provided with eccentric cable-through hole 2, control circuit
Signal wire is connected after passing through eccentric cable-through hole 2 with ground control unit.In concrete operations, all power supplys inside balance main body 1
And signal cable can be by dummy piston assembly eccentric cable-through hole 2 pass through, it is possible to achieve prompt disassembly and installation balance live
Assembly is filled in, the attended operation of circuit can be reduced to greatest extent in operation.
The above-mentioned technical proposal that the present invention is provided, by using plunger-type balance, and line bypass is total by dummy piston
Into；It can solve the problem that leather bag balances life-span low problem, while the poor shortcoming of the maintenanceability that can also avoid line type structure.Specifically
It can realize that very easily dismounting is tieed up by the dummy piston assembly in the above-mentioned concave cavity being arranged in balance main body wall
Shield operation, the concave cavity in balance main body wall is arranged at based on it, directly can be carried out in the side-wall outer side of balance main body, nothing
Main body whole dismounting need to will be balanced, actual operating efficiency can be effectively improved；Balance can be ensure that by the setting of spring
Body interior oil circuit pressure is slightly above mud column pressure all the time, advantageously ensures that hydraulic system safety, reaches the effect of balance.
Further, fixation of the dummy piston assembly in cavity can be realized by the setting of above-mentioned clamping block；Installed
The outer barrel of clamping block and dummy piston assembly, can be put at concave cavity, and clamping block is carried out into locking operation by Cheng Zhong, you can
Realize fixation of the dummy piston assembly in cavity；When needing dismounting, clamping block can be unlocked to operation, you can realize freely
Take out the operation of dummy piston assembly；By the setting of sensor, the oil of the internal oil passages of detection balance main body can be realized
Amount, in order to take corresponding measure to avoid the instrument heavy losses caused by oil starvation；Above-mentioned eccentric cable-through hole can be passed through
Set, using the teaching of the invention it is possible to provide all power supplys of balance body interior and the threading passage of signal cable, fast quick-detach and peace can be realized
Dummy piston assembly is filled, the attended operation of circuit can be reduced to greatest extent in operation.
In the description of the present application, term " installation ", " connected ", " connection ", " fixation " etc. all should be interpreted broadly, example
Such as, " connection " can be fixedly connected or be detachably connected, or be integrally connected；Can be joined directly together, can also
It is indirectly connected to by intermediary.For the ordinary skill in the art, above-mentioned art can be understood as the case may be
The concrete meaning of language in this application.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that specific features, structure, material or feature with reference to the embodiment or example description are contained at least one reality of the application
Apply in example or example.In this manual, identical embodiment or reality are not necessarily referring to the schematic representation of above-mentioned term
Example.Moreover, description specific features, structure, material or feature can in any one or more embodiments or example with
Suitable mode is combined.
Those skilled in the art should be understood that, although the embodiment disclosed by the embodiment of the present invention is as above, but described
Content be only the embodiment for readily appreciating the embodiment of the present invention and using, be not limited to the embodiment of the present invention.It is any
Technical staff in art of the embodiment of the present invention, in the premise for not departing from the spirit and scope disclosed by the embodiment of the present invention
Under, any modification and change, but the scope of patent protection of the embodiment of the present invention can be carried out in the form and details of implementation,
Still it should be subject to the scope of the claims as defined in the appended claims.
Claims (8)
1. a kind of downhole instrument bypass type balanced structure, including balance main body, it is characterised in that
The side wall of the balance main body is provided with dummy piston assembly and the concave cavity for accommodating dummy piston assembly；
The side of the dummy piston assembly is connected with extraneous mud column, and opposite side is connected with balancing the internal oil passages of main body, described flat
Weighing apparatus piston assembly is used to balance the pressure between extraneous mud column and balance body interior oil circuit.
2. downhole instrument bypass type balanced structure according to claim 1, it is characterised in that
The dummy piston assembly includes piston, the spring being connected with piston, the outer barrel on the outside of piston, the one of the outer barrel
End is provided with the first through hole connected with extraneous mud column, and opposite side is provided with the second through hole connected with balance body interior；It is described
One end of spring is fixed on outer barrel close to the end of first through hole, other end connection piston.
3. downhole instrument bypass type balanced structure according to claim 2, it is characterised in that
Clamping block is provided between the outer barrel and the balance main body.
4. downhole instrument bypass type balanced structure according to claim 3, it is characterised in that
The clamping block is arranged on the outer barrel between the end of first through hole and relative cavity end, the clamping block
For realizing fixation of the dummy piston assembly in cavity.
5. the downhole instrument bypass type balanced structure according to Claims 2 or 3 or 4, it is characterised in that
Adapter is provided between the outer barrel and balance main body, the adapter is used for the second through hole and balance for connecting outer barrel
The internal oil passages of main body.
6. the downhole instrument bypass type balanced structure according to Claims 2 or 3 or 4, it is characterised in that the balance main body
By controlling circuit to be connected with ground control unit；
The dummy piston assembly also includes sensor, and the sensor is used for the oil mass for detecting the internal oil passages of balance main body,
And by detection signal by controlling circuit to be sent to ground control unit, the ground control unit is used for according to detection signal,
Monitor the oil mass of internal oil passages.
7. downhole instrument bypass type balanced structure according to claim 6, it is characterised in that
The sensor is travel switch, and the travel switch is arranged on outer barrel at the position of the second through hole.
8. downhole instrument bypass type balanced structure according to claim 6, it is characterised in that
The inside of the balance main body is provided with eccentric cable-through hole, the signal wire of control circuit pass through after the eccentric cable-through hole with ground
Face control device connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710333636.1A CN106979003B (en) | 2017-05-09 | 2017-05-09 | Bypass type balance structure of underground instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710333636.1A CN106979003B (en) | 2017-05-09 | 2017-05-09 | Bypass type balance structure of underground instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106979003A true CN106979003A (en) | 2017-07-25 |
| CN106979003B CN106979003B (en) | 2020-10-13 |
Family
ID=59342138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710333636.1A Active CN106979003B (en) | 2017-05-09 | 2017-05-09 | Bypass type balance structure of underground instrument |
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| Country | Link |
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| CN (1) | CN106979003B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605430A (en) * | 2017-09-21 | 2018-01-19 | 中国海洋石油总公司 | Anti-return self balancing device is used in one kind well cementation |
| CN117759221A (en) * | 2024-02-21 | 2024-03-26 | 中海油田服务股份有限公司 | Downhole rotating well wall coring control method and system |
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| CN202544845U (en) * | 2012-03-28 | 2012-11-21 | 中国海洋石油总公司 | Hydraulic power device for formation drilling while testing instrument |
| CN104935103A (en) * | 2015-06-23 | 2015-09-23 | 华南理工大学 | Motor sealing device of underwater robot and leakage detecting method for motor sealing device |
| US9574423B2 (en) * | 2011-04-12 | 2017-02-21 | Halliburton Energy Services, Inc. | Safety valve with electrical actuator and tubing pressure balancing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107605430A (en) * | 2017-09-21 | 2018-01-19 | 中国海洋石油总公司 | Anti-return self balancing device is used in one kind well cementation |
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| CN117759221A (en) * | 2024-02-21 | 2024-03-26 | 中海油田服务股份有限公司 | Downhole rotating well wall coring control method and system |
| CN117759221B (en) * | 2024-02-21 | 2024-05-03 | 中海油田服务股份有限公司 | Downhole rotating well wall coring control method and system |
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| CN106979003B (en) | 2020-10-13 |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Applicant after: China Offshore Oil Group Co., Ltd. Applicant after: China Oilfield Services Limited Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Applicant before: China National Offshore Oil Corporation Applicant before: China Oilfield Services Limited |
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