CN207795115U - Totally-enclosed shallow layer core fetching tool for oil - Google Patents
Totally-enclosed shallow layer core fetching tool for oil Download PDFInfo
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- CN207795115U CN207795115U CN201820143593.0U CN201820143593U CN207795115U CN 207795115 U CN207795115 U CN 207795115U CN 201820143593 U CN201820143593 U CN 201820143593U CN 207795115 U CN207795115 U CN 207795115U
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Abstract
The utility model belongs to petroleum geology drilling equipment field, more particularly to a kind of totally-enclosed shallow layer core fetching tool for oil, including top connection, short circuit, outer barrel, drill bit, inner cylinder and core grabber, it further include piston, drop-hanger bearing component, cut core ball and coring ball, the piston, drop-hanger bearing component, inner cylinder and core grabber from top to bottom pass sequentially through the connection that is screwed in the coring tool enclosure, wherein, the upper end of piston is provided with and the sealing surface for cutting the cooperation of core ball, the side of piston is fixedly connected by pin with top connection, the structure of the drop-hanger bearing component includes upper connector, pressure cap A, lower connector, pressure cap B and bearing, wherein, upper connector is connect with the piston.The side of upper connector be provided with for drilling fluid by liquid pass hole.The utility model be specific to shallow-layer soft formation, not diagenesis stratum and broken formation and design, solve the problems, such as that existing coring tool shallow-layer coring is low success rate of.
Description
Technical field
The utility model belongs to petroleum geology drilling equipment field more particularly to a kind of totally-enclosed shallow layer core fetching tool for oil.
Background technology
Coring tool is a kind of power tool indispensable in petroleum geology drilling process, and existing coring tool is typically logical
Rock core is broken taking-up by the mode for crossing clamping rock core from stratum, and for harder stratum, this coring tool is very useful,
Coring success rate is very high, but for the soft formation of shallow-layer, not diagenesis stratum and broken formation, the coring success of this coring tool
Rate is relatively low, substantially prolongs the activity duration, reduces operating efficiency.
Utility model content
The utility model provides a kind of totally-enclosed shallow layer core fetching tool for oil, to solve the problems mentioned in the above background technology.
The technical issues of the utility model is solved is realized using following technical scheme：
The utility model includes top connection, short circuit, outer barrel, drill bit, inner cylinder and core grabber, top connection, short circuit, outer barrel and brill
Head is from top to bottom sequentially connected, and forms the shell of the coring tool, and inner cylinder and core grabber are mounted on the coring tool
Inside, further include piston, drop-hanger bearing component, cut core ball and coring ball, the piston, drop-hanger bearing component, inner cylinder and
Core grabber from top to bottom passes sequentially through the connection that is screwed in the coring tool enclosure, wherein the upper end of piston is set
It is equipped with and is fixedly connected with top connection by pin with the sealing surface for cutting the cooperation of core ball, the side of piston, the suspension
The structure of bearing assembly includes upper connector, pressure cap A, lower connector, pressure cap B and bearing, wherein upper connector and the work
Plug connection, lower connector connect with the inner cylinder, and upper connector and pressure cap A are connected through a screw thread and from the outsides of the bearing
Bearing is stuck in therebetween, lower connector and pressure cap B are connected through a screw thread and bearing are stuck in two from the inside of the bearing
Between person, so that can between the sub-assembly and lower connector and the sub-assembly of pressure cap B compositions of upper connector and pressure cap A compositions
With relative rotation, the lower end of lower connector is connected with coring ball seat, and the upper end of coring ball seat is provided with and the coring ball
The sealing surface matched, the side of upper connector be provided with for drilling fluid by liquid pass hole；
It is provided with the cat's paw stretched out from the end face of core grabber on the core grabber, is provided in the side wall of the drill bit
Drilling fluid runner is provided with the guiding surface that the cat's paw can be forced to be bent to the center line of core grabber on the inside of drill bit.
The bearing is thrust bearing.
The beneficial effects of the utility model are：
1, the utility model be specific to shallow-layer soft formation, not diagenesis stratum and broken formation and design, and it is existing
There is the clamping in technology to break coring mode different, the utility model uses cut-off type coring mode, when coring, to coring tool
Interior input coring ball, after coring ball blocks the through-hole of piston centre, piston downlink under the pressure effect of drilling fluid, to push away
Dynamic core grabber downlink, during core grabber downlink, the cat's paw on core grabber gathers under the action of guiding surface to center, to
Rock core is cut off and holds rock core in rock core bottom, realizes coring.To solve existing coring tool shallow-layer coring at
The low problem of power.
2, drop-hanger bearing component is provided with inside the utility model, which can make in bit drilling process
Inner cylinder for storing rock core keeps opposing stationary with rock core, destruction of the inner cylinder to rock core is prevented, to be further ensured that rock core
Integrality.
3, bottom of the utility model on the inside of drop-hanger bearing component is provided with for blocking coring tool central passage
Coring ball, and it is provided with liquid pass hole in the side of drop-hanger bearing component, liquid pass hole leads to drilling fluid between inner cylinder and outer barrel
It in space, avoids drilling fluid and rock core is washed away, to further protect rock core.
Description of the drawings
Fig. 1 is the front view of the utility model；
Fig. 2 is the structural schematic diagram of drop-hanger bearing component.
In figure：1- top connections, 2- cut core ball, 3- pins, 4- pistons, 5- short circuits, 6- outer barrels, 7- inner cylinders, 8- core grabbers, 9-
Cat's paw, 10- drilling fluid runners, 11- coring balls, 12- drop-hanger bearing components, the upper connectors of 13-, 14- liquid pass holes, 15- pressure cap B,
16- bearings, connector under 17- pressure caps A, 18-, 19- coring ball seats, 20- guiding surfaces, 21- drilling fluid runners.
Specific implementation mode
The utility model is described further below in conjunction with attached drawing：
The present embodiment includes top connection 1, short circuit 5, outer barrel 6, drill bit 10, inner cylinder 7 and core grabber 8, top connection 1, short circuit 5,
Outer barrel 6 and drill bit 10 are from top to bottom sequentially connected, and form the shell of the coring tool, and inner cylinder 7 and core grabber 8 are mounted on institute
The inside for the coring tool stated.It is above common structure in the prior art, details are not described herein.
The utility model further includes piston 4, drop-hanger bearing component 12, cuts core ball 2 and coring ball 11, and the piston 4 hangs
Hanging scroll bearing assembly 12, inner cylinder 7 and core grabber 8 from top to bottom pass sequentially through the company of being screwed in the coring tool enclosure
Connect, wherein the upper end of piston 4 be provided with the described sealing surface for cutting the cooperation of core ball 2, the side of piston 4 by pin 3 with it is upper
Connector 1 is fixedly connected.The utility model be specific to shallow-layer soft formation, not diagenesis stratum and broken formation and design,
It is different that coring mode is broken from clamping in the prior art, and the utility model is using cut-off type coring mode, when coring, to coring
Input coring ball 2 in tool, after coring ball 2 blocks the through-hole at 4 center of piston, under piston 4 is under the pressure effect of drilling fluid
Row, to push 8 downlink of core grabber, during 8 downlink of core grabber, the cat's paw 9 on core grabber 8 is under the action of guiding surface 20
Gather to center, to cut off rock core and hold rock core in rock core bottom, realizes coring.To solve existing coring
The low success rate of problem of tool shallow-layer coring.
The structure of the drop-hanger bearing component 12 include upper connector 13, pressure cap A17, lower connector 18, pressure cap B15 and
Bearing 16, wherein upper connector 13 is connect with the piston 4, and lower connector 18 is connect with the inner cylinder 7, upper connector
13 and pressure cap A17 is connected through a screw thread and is stuck in therebetween from the outside of the bearing 16 by bearing 16, lower 18 He of connector
Pressure cap B15 is connected through a screw thread and is stuck in therebetween from the inside of the bearing 16 by bearing 16, so that upper connector
It can be with relative rotation between 13 and the sub-assembly and lower connector 18 and the sub-assembly of pressure cap B15 compositions of pressure cap A17 compositions.
The structure of above-mentioned drop-hanger bearing component 12 is simple, easy to assembly, and rotation is reliable, and failure rate is low.
The lower end of lower connector 18 is connected with coring ball seat 19, and the upper end of coring ball seat 19 is provided with and the coring ball
11 matched sealing surfaces, the side of upper connector 13 be provided with for drilling fluid by liquid pass hole 14.It is set inside the utility model
Drop-hanger bearing component 12 is set, which can be used in the inner cylinder 7 and rock of storage rock core during 10 rotary drilling of drill bit
The heart keeps opposing stationary, destruction of the inner cylinder 7 to rock core is prevented, to be further ensured that the integrality of rock core.
Be provided with drilling fluid runner 21 in the side wall of the drill bit 10, the inside of drill bit 10 be provided with can force it is described
The guiding surface 20 that cat's paw 9 bends to the center line of core grabber 8.The utility model is set in the bottom of 12 inside of drop-hanger bearing component
The coring ball 11 for blocking coring tool central passage has been set, and liquid pass hole is provided in the side of drop-hanger bearing component 12
14, liquid pass hole 14 leads to drilling fluid in the space between inner cylinder 7 and outer barrel 6, is then discharged, avoids from drilling fluid runner 21
Drilling fluid washes away rock core, to further protect rock core.
The bearing 16 is thrust bearing.
Claims (2)
1. a kind of totally-enclosed shallow layer core fetching tool for oil, including top connection (1), short circuit (5), outer barrel (6), drill bit (10), inner cylinder (7) and
Core grabber (8), top connection (1), short circuit (5), outer barrel (6) and drill bit (10) are from top to bottom sequentially connected, and form the coring
The shell of tool, inner cylinder (7) and core grabber (8) are mounted on the inside of the coring tool, it is characterised in that：It further include piston
(4), drop-hanger bearing component (12), cut core ball (2) and coring ball (11), it is the piston (4), drop-hanger bearing component (12), interior
Cylinder (7) and core grabber (8) from top to bottom pass sequentially through the connection that is screwed in the coring tool enclosure, wherein living
The upper end of plug (4) be provided with the described sealing surface for cutting core ball (2) cooperation, the side of piston (4) by pin (3) with above connect
Head (1) is fixedly connected, and the structure of the drop-hanger bearing component (12) includes upper connector (13), pressure cap A (17), lower connector
(18), pressure cap B (15) and bearing (16), wherein upper connector (13) is connect with the piston (4), lower connector (18) and
Inner cylinder (7) connection, upper connector (13) and pressure cap A (17) are connected through a screw thread and will from the outside of the bearing (16)
Bearing (16) is stuck in therebetween, and lower connector (18) and pressure cap B (15) are connected through a screw thread and from the interior of the bearing (16)
Bearing (16) is stuck in therebetween by side, so that the sub-assembly and lower connection of upper connector (13) and pressure cap A (17) compositions
Can be with relative rotation between body (18) and the sub-assembly of pressure cap B (15) compositions, the lower end of lower connector (18) is connected with coring ball
Seat (19), the upper end of coring ball seat (19) be provided with described coring ball (11) the matched sealing surface, upper connector (13)
Side be provided with for drilling fluid by liquid pass hole (14)；
The cat's paw (9) stretched out from the end face of core grabber (8), the side of the drill bit (10) are provided on the core grabber (8)
Drilling fluid runner (21) is provided in wall, being provided on the inside of drill bit (10) can force the cat's paw (9) to core grabber (8)
The guiding surface (20) of center line bending.
2. a kind of totally-enclosed shallow layer core fetching tool for oil according to claim 1, it is characterised in that：The bearing (16) is to push away
Power bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820143593.0U CN207795115U (en) | 2018-01-26 | 2018-01-26 | Totally-enclosed shallow layer core fetching tool for oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820143593.0U CN207795115U (en) | 2018-01-26 | 2018-01-26 | Totally-enclosed shallow layer core fetching tool for oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207795115U true CN207795115U (en) | 2018-08-31 |
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ID=63269777
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820143593.0U Active CN207795115U (en) | 2018-01-26 | 2018-01-26 | Totally-enclosed shallow layer core fetching tool for oil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718492A (en) * | 2022-04-28 | 2022-07-08 | 大庆市达美石油装备制造有限公司 | Soft stratum core grabbing device |
-
2018
- 2018-01-26 CN CN201820143593.0U patent/CN207795115U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718492A (en) * | 2022-04-28 | 2022-07-08 | 大庆市达美石油装备制造有限公司 | Soft stratum core grabbing device |
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