CN207795114U - Pressure balance closed coring tool - Google Patents
Pressure balance closed coring tool Download PDFInfo
- Publication number
- CN207795114U CN207795114U CN201820143592.6U CN201820143592U CN207795114U CN 207795114 U CN207795114 U CN 207795114U CN 201820143592 U CN201820143592 U CN 201820143592U CN 207795114 U CN207795114 U CN 207795114U
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- CN
- China
- Prior art keywords
- inner cylinder
- outer barrel
- coring tool
- drill bit
- core
- 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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Abstract
The utility model belongs to petroleum geology drilling equipment field, more particularly to a kind of pressure balance closed coring tool, including big connector, outer barrel, inner cylinder, drill bit, core grabber and closed head, drill bit is fixedly connected on the lower end of inner cylinder, core grabber is arranged in the inside of drill bit, closed head is fixedly connected on by pin in the centre bore of drill bit, core sealing fluid is filled in inner cylinder, it further include outer barrel top connection, bit adapter and silk plug, the big connector, outer barrel top connection, outer barrel, bit adapter and drill bit from top to bottom pass sequentially through threaded connection, to form the shell of coring tool, the inner cylinder is arranged in the inside of coring tool, the silk plug is threadedly attached in the center of big connector.Design is optimized to the structure of traditional closed coring tool in the utility model, reduces the number of part, the difficulty of processing of part is reduced, while the assembly of part is easier, to significantly reduce the manufacturing cost of coring tool.
Description
Technical field
The utility model belongs to petroleum geology drilling equipment field more particularly to a kind of pressure balance closed coring tool.
Background technology
Closed coring tool is common a kind of coring tool in petroleum geology drilling process, interior in closed coring tool
The core sealing fluid for protecting core is loaded in cylinder, the upper end of inner cylinder is provided with sealing piston, and the lower end of inner cylinder is provided with
Closed head, closed head are connected to by pin on coring bit, and sealing piston and closed head are close by core from upper and lower ends respectively
Fluid-tight is closed in inner cylinder.When coring, closed butt hits shaft bottom and cuts pin, and closed head then moves to core interior together
In cylinder, in the process, core sealing fluid is flow on the outside of core, realizes the protection to core.However, existing sealed coring work
There are notable defects for tool：On the one hand, the structure of existing closed coring tool is more complicated, high processing costs, and time-consuming for assembly；
On the other hand, in the prior art, when stopping to bore in location of the coring procedure, core sealing fluid is easy too fast leakage, to make core sealing fluid
It has a greatly reduced quality to the protective effect of core.
Utility model content
The utility model provides a kind of pressure balance closed coring tool, to solve mentioned above in the background art ask
Topic.
The technical issues of the utility model is solved is realized using following technical scheme：
The utility model includes that big connector, outer barrel, inner cylinder, drill bit, core grabber and closed head, drill bit are fixedly connected on inner cylinder
Lower end, core grabber is arranged in the inside of drill bit, and closed head is fixedly connected in the centre bore of drill bit by pin, is filled out in inner cylinder
Further include outer barrel top connection, bit adapter and silk plug filled with core sealing fluid, the big connector, outer barrel top connection, outer barrel,
Bit adapter and drill bit from top to bottom pass sequentially through threaded connection, to form the shell of coring tool, inner cylinder setting
In the inside of coring tool, the upper end of inner cylinder is threadedly attached on big connector, and the silk plug is threadedly attached in greatly
The center of connector was provided with liquid channel to block the upper end of inner cylinder in the big connector, cross liquid channel by big connector
Centre bore and outer barrel top connection and inner cylinder between interlayer be connected to.
The body of rod for being useful for dismounting silk plug is fixedly connected at the top of the silk plug, the upper end of the body of rod is provided with for blocking
The spanner collet of spanner.The sponge bushing of thin-walled is provided in the inner cylinder, the internal diameter of sponge bushing is smaller than the outer diameter of core
1mm.The inner barrel and outer barrel is connected by welding manner, and solder joint is located at the end of outer barrel.
The beneficial effects of the utility model are：
1, design is optimized to the structure of traditional closed coring tool in the utility model, reduces of part
Number reduces the difficulty of processing of part, while the assembly of part is easier, to significantly reduce the system of coring tool
Make factory's sheet.
2, the utility model has changed sealing piston in the prior art into silk plug, is sealed the upper end of inner cylinder with silk plug
Afterwards, the gap that core sealing fluid under atmospheric pressure will not be between closed head and inner cylinder leaks out, so as to avoid stopping boring
The loss of Shi Yanxin sealing fluids.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model.
In figure：The big connectors of 1-, 2- cross liquid channel, 3- outer barrel top connections, 4- outer barrels, 5- inner cylinders, 6- bit adapters, 7- brills
Head, 8- core grabbers, 9- pins, the closed heads of 10-, 11- silk plugs, the 12- bodies of rod, 13- sponge bushings.
Specific implementation mode
The utility model is described further below in conjunction with attached drawing：
The present embodiment includes big connector 1, outer barrel 4, inner cylinder 5, drill bit 7, core grabber 8 and closed head 10, and drill bit 7 is fixedly connected
In the lower end of inner cylinder 5, core grabber 8 is arranged in the inside of drill bit 7, and closed head 10 is fixedly connected on the center of drill bit 7 by pin 9
In hole, core sealing fluid is filled in inner cylinder 5.It is above universal architecture in the prior art, details are not described herein.
The utility model further includes outer barrel top connection 3, bit adapter 6 and silk plug 11, is connect on the big connector 1, outer barrel
First 3, outer barrel 4, bit adapter 6 and drill bit 7 from top to bottom pass sequentially through threaded connection, to form the shell of coring tool, institute
The inner cylinder 5 stated is arranged in the inside of coring tool, and the upper end of inner cylinder 5 is threadedly attached on big connector 1, the silk plug 11
The center of big connector 1 is threadedly attached in block the upper end of inner cylinder 4, it is logical that liquid was provided in the big connector 1
Road 2 crosses liquid channel 2 and is connected to the interlayer between the centre bore of big connector 1 and outer barrel top connection 3 and inner cylinder 5.The utility model pair
Design is optimized in the structure of traditional closed coring tool, reduces the number of part, reduces the difficulty of processing of part,
Simultaneously so that the assembly of part is easier, to significantly reduce manufactory's sheet of coring tool.
In addition, the utility model has changed sealing piston in the prior art into silk plug 11, with silk plug 11 by the upper of inner cylinder 5
After end seal is lived, the gap that core sealing fluid under atmospheric pressure will not be between closed head 10 and inner cylinder 5 leaks out, to keep away
The loss of core sealing fluid when having exempted to stop boring.
The top of the silk plug 11 is fixedly connected with the body of rod 12 for being useful for dismounting silk plug 11, and the upper end of the body of rod 12 is provided with
Spanner collet for blocking spanner.Silk plug 11 is arranged on big connector 1, and by silk in such a way that spanner rotates the body of rod 12
Stifled 11 are mounted on big connector 1, are not only convenient for the assembly of silk plug 11, also allow for the Fast Filling of core sealing fluid.
Sponge bushing 13 is provided in the inner cylinder 5, the internal diameter of sponge bushing 13 is smaller 1mm than the outer diameter of core, core
After in place, sponge bushing 13 is coated on around core, to further protect core.
The inner cylinder 5 is connected with outer barrel 4 by way of spot welding, and solder joint is located at the end of outer barrel 4.After welding, both
Inner cylinder 5 and outer barrel 4 can be fixed together, and fluid passage can be flowed out between inner cylinder 5 and outer barrel 4, meanwhile,
Inner cylinder 5 and outer barrel 4, which are welded together, can greatly facilitate the assembly of coring tool, improve efficiency of assembling.
Claims (4)
1. a kind of pressure balance closed coring tool, including big connector (1), outer barrel (4), inner cylinder (5), drill bit (7), core grabber
(8) and closed head (10), drill bit (7) are fixedly connected on the lower end of inner cylinder (5), and core grabber (8) is arranged in the inside of drill bit (7),
Closed head (10) is fixedly connected on by pin (9) in the centre bore of drill bit (7), and core sealing fluid is filled in inner cylinder (5),
It is characterized in that：Further include outer barrel top connection (3), bit adapter (6) and silk plug (11), the big connector (1), outer barrel top connection
(3), outer barrel (4), bit adapter (6) and drill bit (7) from top to bottom pass sequentially through threaded connection, to form the outer of coring tool
Shell, the inner cylinder (5) are arranged in the inside of coring tool, and the upper end of inner cylinder (5) is threadedly attached on big connector (1),
The silk plug (11) is threadedly attached in the center of big connector (1) to block the upper end of inner cylinder (5), and described connects greatly
It was provided with liquid channel (2) in head (1), crosses liquid channel (2) by the centre bore of big connector (1) and outer barrel top connection (3) and inner cylinder
(5) the interlayer connection between.
2. a kind of pressure balance closed coring tool according to claim 1, it is characterised in that：The silk plug (11)
Top is fixedly connected with the body of rod (12) for being useful for dismounting silk plug (11), and the upper end of the body of rod (12) is provided with for blocking pulling for spanner
Hand collet.
3. a kind of pressure balance closed coring tool according to claim 1, it is characterised in that：In the inner cylinder (5)
It is provided with sponge bushing (13), the internal diameter of sponge bushing (13) is smaller 1mm than the outer diameter of core.
4. a kind of pressure balance closed coring tool according to claim 1, it is characterised in that：The inner cylinder (5) and
Outer barrel (4) is connected by welding manner, and solder joint is located at the end of outer barrel (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820143592.6U CN207795114U (en) | 2018-01-26 | 2018-01-26 | Pressure balance closed coring tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820143592.6U CN207795114U (en) | 2018-01-26 | 2018-01-26 | Pressure balance closed coring tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207795114U true CN207795114U (en) | 2018-08-31 |
Family
ID=63270722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820143592.6U Active CN207795114U (en) | 2018-01-26 | 2018-01-26 | Pressure balance closed coring tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207795114U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592814A (en) * | 2022-03-17 | 2022-06-07 | 大庆市达美石油装备制造有限公司 | Soft and hard stratum airtight coring device |
-
2018
- 2018-01-26 CN CN201820143592.6U patent/CN207795114U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592814A (en) * | 2022-03-17 | 2022-06-07 | 大庆市达美石油装备制造有限公司 | Soft and hard stratum airtight coring device |
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| GR01 | Patent grant |