CN210598954U - Pressure balancing device - Google Patents

Pressure balancing device Download PDF

Info

Publication number
CN210598954U
CN210598954U CN201921396513.3U CN201921396513U CN210598954U CN 210598954 U CN210598954 U CN 210598954U CN 201921396513 U CN201921396513 U CN 201921396513U CN 210598954 U CN210598954 U CN 210598954U
Authority
CN
China
Prior art keywords
cylinder
shell
mud
pressure
mud pipe
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.)
Expired - Fee Related
Application number
CN201921396513.3U
Other languages
Chinese (zh)
Inventor
卢晓丽
樊永涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhengzhou Yiyuanxiang Oil Science And Technology Ltd
Original Assignee
Zhengzhou Yiyuanxiang Oil Science And Technology Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhengzhou Yiyuanxiang Oil Science And Technology Ltd filed Critical Zhengzhou Yiyuanxiang Oil Science And Technology Ltd
Priority to CN201921396513.3U priority Critical patent/CN210598954U/en
Application granted granted Critical
Publication of CN210598954U publication Critical patent/CN210598954U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Measuring Fluid Pressure (AREA)

Abstract

The utility model relates to a logging auxiliary assembly technical field, in particular to caliper downhole measurement's pressure balance device. The utility model provides a pressure balancing unit, includes the helmet, shell, lower clutch and cylinder, set up the electric connector in the helmet, set up the sealing member in the shell, set up the mud passageway on the shell, shell sub-unit connection mud pipe, mud pipe sub-unit connection the cylinder, in mud pipe intercommunication mud passageway and the cylinder, set up balanced piston in the cylinder, the external diameter of cylinder is less than the internal diameter of lower clutch. The cylinder barrel with the outer diameter smaller than the inner diameter of the inner joint is arranged in the lower joint of the utility model, and a cable channel is arranged between the lower joint and the cylinder barrel, thus the use is convenient; the logging device can work for a long time at high temperature and high pressure in the well, greatly reduces the production cost and improves the logging efficiency.

Description

Pressure balancing device
Technical Field
The utility model relates to a logging auxiliary assembly technical field, in particular to caliper downhole measurement's pressure balance device.
Background
The logging-while-drilling instrument usually adopts a hydraulic system as a power source to detect formation oil gas information below several kilometers, and in the whole logging process, the requirement is to ensure that the internal oil pressure is always higher than the external drilling fluid pressure, otherwise, the drilling fluid permeates into the hydraulic system to influence the normal operation of the instrument. In order to solve the problem, a corresponding base pressure self-supply device is required to be constructed for increasing the pressure in a hydraulic system of the logging instrument, and the internal oil pressure of the system can be ensured to be larger than the external drilling fluid pressure by adopting a pressure balance method.
At present, a common pressure balancing device is of a balance piston type, a leather bag type and the like, and when the leather bag type balancing device works in a high-temperature and high-pressure environment, the leather bag is easy to age, damage and lose efficacy, so that slurry flows back into an instrument, and the instrument is damaged or even scrapped. The expansion degree of the leather bag type balancing device has the maximum value, and the balance can not be adjusted when the pressure in the hydraulic oil cavity is still higher than the pressure in the slurry cavity; the balance piston type balancing device is lack of a cable channel and brings much inconvenience when in use.
Disclosure of Invention
An object of the utility model is to provide a reasonable in design, simple structure, a pressure balance device that can work for a long time in complicated environment in the pit.
The technical scheme of the utility model is that:
the utility model provides a pressure balancing unit, includes the helmet, shell, lower clutch and cylinder, set up the electric connector in the helmet, set up the sealing member in the shell, set up the mud passageway on the shell, shell sub-unit connection mud pipe, mud pipe sub-unit connection the cylinder, in mud pipe intercommunication mud passageway and the cylinder, set up balanced piston in the cylinder, the external diameter of cylinder is less than the internal diameter of lower clutch.
The lower end of the electric connector is connected with a cable, and the cable penetrates through the sealing element in a sealing mode.
The lower part of the protective cap is connected with the upper joint through internal threads, and the lower part of the upper joint is connected with the shell through internal threads.
The outer wall of the lower part of the shell is provided with an annular groove, a connecting thread sleeve is arranged in the annular groove, and the upper part of the lower joint is connected with the connecting thread sleeve through an internal thread.
The upper part of the slurry channel is obliquely arranged.
The slurry channel is provided with a filter screen
And a sealing ring is arranged between the mud pipe and the shell, and a sealing ring is arranged between the mud pipe and the cylinder barrel.
The cylinder barrel with the outer diameter smaller than the inner diameter of the inner joint is arranged in the lower joint of the utility model, and a cable channel is arranged between the lower joint and the cylinder barrel, thus the use is convenient; the downhole high-temperature high-pressure gas logging device can work for a long time at high temperature and high pressure in the well, greatly reduces the production cost, improves the logging efficiency, and has the advantages of convenience in installation, easiness in maintenance and long service life.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
1, a protective cap 2, an electric connector 3, a cable 4, an upper joint 5, a sealing member 6, a cable 7, an outer shell 8, a threaded sleeve 9, a mud pipe 11, an eccentric shell 12 and a balance piston 13 are connected with a mud channel of a lower joint 14.
Detailed Description
The utility model provides a pressure balancing unit, includes helmet 1, shell 7, lower clutch 13 and cylinder 11, sets up electric connector 2 in the helmet 1, and electric connector 2 lower extreme connecting cable 3, and 1 lower part of helmet is through female connection top connection 4, and female connection shell 7 is passed through to top connection 4 lower part.
The sealing element 5 is arranged in the shell 7, the cable 3 penetrates through the sealing element 5 in a sealing mode, the mud channel 14 is arranged on the lower portion of the shell 7, the mud channel 14 is communicated with the shell 7, the mud channel 14 is provided with a filter screen and can filter mud, particles are prevented from entering the cylinder barrel 11, the upper portion of the mud channel 14 is arranged in an inclined mode, the lower portion of the shell 7 is connected with the mud pipe 9, and a sealing ring is arranged between the mud pipe 9 and the shell 7.
An annular groove is formed in the outer wall of the lower portion of the shell 7, a connecting threaded sleeve 8 is arranged in the annular groove, the upper portion of the lower connector 13 is connected with the connecting threaded sleeve 8 through internal threads, a cylinder barrel 11 is arranged in the lower connector 13, the outer diameter of the cylinder barrel 11 is smaller than the inner diameter of the lower connector 13, a cable 3 channel is formed, the cable 3 penetrates through the balancing device and only penetrates through the sealing element 5, machining difficulty is reduced, and installation is convenient; the upper end of the cylinder barrel 11 is connected with the lower end of the mud pipe 9, a sealing ring is arranged between the mud pipe 9 and the cylinder barrel 11, and the mud pipe 9 is communicated with the mud channel 14 and the inside of the cylinder barrel 11.
The balance piston 12 is arranged in the cylinder barrel 11, the piston is well sealed and can move flexibly, the balance piston is placed underground in the using process, pressure generated underground enters the cylinder barrel 11 through the slurry channel 14, the balance piston 12 moves under the action of the pressure to keep pressure balance of the two cavities, the bearing pressure of an instrument is larger, the depth of the instrument is deeper, and the measurement of the instrument is more accurate.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims (7)

1. The utility model provides a pressure balancing unit, its characterized in that, includes helmet (1), shell (7), lower clutch (13) and cylinder (11), set up electric connector (2) in helmet (1), set up sealing member (5) in shell (7), set up mud passageway (14) on shell (7), shell (7) sub-unit connection mud pipe (9), mud pipe (9) sub-unit connection in cylinder (11), mud pipe (9) intercommunication mud passageway (14) and cylinder (11), set up balanced piston (12) in cylinder (11), the external diameter of cylinder (11) is less than the internal diameter of lower clutch (13).
2. A pressure equalizing device according to claim 1, characterized in that the lower end of the electrical connector (2) is connected to a cable (3), the cable (3) being sealed through a seal (5).
3. A pressure equalizing device according to claim 1, characterized in that the lower part of the protective cap (1) is connected to the upper fitting (4) by means of an internal thread, and the lower part of the upper fitting (4) is connected to the housing (7) by means of an internal thread.
4. A pressure equalizing device according to claim 1, characterized in that the outer wall of the lower part of the housing (7) is provided with an annular groove, a connecting threaded sleeve (8) is arranged in the annular groove, and the upper part of the lower joint (13) is connected with the connecting threaded sleeve (8) through internal threads.
5. A pressure equalizing device according to claim 1, characterized in that the upper part of the slurry channel (14) is arranged obliquely.
6. A pressure equalizing device according to claim 1, characterized in that a sealing ring is arranged between the slurry pipe (9) and the housing (7), and a sealing ring is arranged between the slurry pipe (9) and the cylinder (11).
7. A pressure equalizing device according to claim 1, characterized in that the slurry channel (14) is provided with a filter screen.
CN201921396513.3U 2019-08-27 2019-08-27 Pressure balancing device Expired - Fee Related CN210598954U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921396513.3U CN210598954U (en) 2019-08-27 2019-08-27 Pressure balancing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921396513.3U CN210598954U (en) 2019-08-27 2019-08-27 Pressure balancing device

Publications (1)

Publication Number Publication Date
CN210598954U true CN210598954U (en) 2020-05-22

Family

ID=70691376

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921396513.3U Expired - Fee Related CN210598954U (en) 2019-08-27 2019-08-27 Pressure balancing device

Country Status (1)

Country Link
CN (1) CN210598954U (en)

Similar Documents

Publication Publication Date Title
CN202928792U (en) Multifunctional packer testing apparatus
CN102200000A (en) Blowout preventing box of continuous oil pipe and drill rod
CN104594826A (en) Piston type hydraulic chuck
CN111878069A (en) Composite continuous pipe cable oil-water well casing leakage finding system and method
CN202215184U (en) Protective device of underwater well head in sea
CN103216209B (en) Packer in tubing and casing sealing propertytest pipe
CN203757255U (en) Deepwater multi-loop fast-connecting female joint
CN210598954U (en) Pressure balancing device
CN201292781Y (en) Pressure equilibrium elevator for rotary dugging drill
CN210714497U (en) Double-layer combined sleeve
CN210217643U (en) Two-stage airtight thread structure of downhole tool
CN111963153A (en) Test system and method for water outlet section of horizontal well of composite continuous pipe cable
CN207377535U (en) A kind of Simple casing head
CN110566183A (en) Underground oil level detection device
CN203066923U (en) Fast installed simple casing head
CN102606147B (en) Formation testing while drilling instrument
CN202392109U (en) Two-stage seal structure for dynamic seal of underground dynamic drilling tool
CN212054591U (en) Underground flexible continuous composite pipe connecting joint with cable preset on inner wall
CN210089918U (en) Integral adjustable direction conversion joint for taper thread pressure gauge
CN205350060U (en) Tandem type bearing for drilling tool
CN210565965U (en) Piston type buffer
CN210264613U (en) High-pressure sealing device for cable passing through wellhead
CN204419075U (en) Piston hydraulic chuck
CN203769703U (en) Coal-bed gas well pressure meter cable wellhead sealing joint
CN202745746U (en) External slips connector for continuous pipe

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20200522

Termination date: 20200827

CF01 Termination of patent right due to non-payment of annual fee