CN206668248U - A kind of downhole testing instrument protection device - Google Patents
A kind of downhole testing instrument protection device Download PDFInfo
- Publication number
- CN206668248U CN206668248U CN201720331172.6U CN201720331172U CN206668248U CN 206668248 U CN206668248 U CN 206668248U CN 201720331172 U CN201720331172 U CN 201720331172U CN 206668248 U CN206668248 U CN 206668248U
- Authority
- CN
- China
- Prior art keywords
- mandrel
- transition joint
- screw thread
- central
- 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.)
- Expired - Fee Related
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- Fluid-Damping Devices (AREA)
Abstract
The utility model relates to a kind of downhole testing instrument protection device, it is characterised in that：Including top connection, outer barrel, piston, the first mandrel, locking section set, transition joint, outer tube, central tube, damping spring and the second mandrel；The top connection, outer barrel, piston, the first mandrel, locking save set, transition joint, central tube and the second mandrel coaxial line and are sequentially connected, first mandrel is provided with radial direction pressure releasing hole, the radial direction pressure releasing hole is located between the piston and locking section set, and the damping spring is located between the outer tube, central tube.The utility model not only has a shock-absorbing function, and integrated buffer structure, has a pooling feature, and damping, buffering is better.
Description
Technical field
The utility model belongs to oil equipment technical field, more particularly to a kind of downhole testing instrument protection device.
Background technology
There is perforation once to be completed with formation testing two procedures, accelerate formation testing progress, be anti-for the testing combination operation technology of perforation one
Only many advantages, such as blowout, acquisition optimal geologic information.Detonation wave impacts strong to tubing string during perforation, to protect tester not
It is badly shaken, needs to connect longitudinal damper in perforation tubular column.Existing longitudinal damper relies primarily on spring as main damping
Element, it is bad without pooling feature, protecting effect.
The content of the invention
The utility model aims to solve the problem that the technical problem that longitudinal damper protecting effect is bad in the prior art and provides one
Plant not single downhole testing instrument protection device with damping and with pooling feature.
The utility model is adopted the technical scheme that to solve technical problem present in known technology：A kind of underground is surveyed
Test instrument protection device, it is characterised in that：Including top connection, outer barrel, piston, the first mandrel, locking section set, transition joint, outside
Sleeve pipe, central tube, damping spring and the second mandrel；The top connection has central through hole, and the lower end of the top connection is with outer
Screw thread, the outer barrel have central through hole, and the both ends of the outer barrel have internal thread, the lower end of the top connection and the outer barrel
Upper end be connected through a screw thread, seal is provided between the top connection and the outer barrel；The locking section set leads to center
Hole, the upper end of the locking section set have external screw thread, and the upper end and the lower end of the outer barrel of the locking section set are connected by screw thread
Connect, seal is provided between the outer barrel and the locking section set；The piston has central through hole, and the piston is fitted in institute
State in outer barrel, seal is provided between the inwall of the outer wall of the piston and the outer barrel；There is first mandrel center to lead to
Hole, first mandrel are inserted into the locking section set, and the upper end of first mandrel is connected with the piston, and described first
Seal is provided between mandrel and the locking section set；The lower end of first mandrel has external screw thread, the transition joint tool
There is a central through hole, the upper end of the transition joint has an internal thread, and the lower end of first mandrel is upper with the transition joint
End is connected through a screw thread；The lower end of the transition joint has external screw thread, and the upper end of the outer tube has internal thread, described outer
The upper end of sleeve pipe and the lower end of the transition joint are connected through a screw thread, and are provided between the transition joint and the outer tube close
Sealing；The lower end of the transition joint has internal thread, and the upper end of the central tube has external screw thread, the upper end of the central tube
It is connected through a screw thread with the lower end of the transition joint, seal is provided between the transition joint and the central tube；It is described
Annulus chamber is formed between outer tube and the central tube, second mandrel has a central through hole, second mandrel it is upper
Portion is inserted into the annulus intracavitary, between second mandrel and the outer tube, second mandrel and the central tube
Between be provided with seal, the bottom of the outer tube is provided with the shear pin of the fixed outer tube and second mandrel；It is described
Damping spring is located at the annulus intracavitary；The top connection, outer barrel, piston, the first mandrel, locking section set, transition joint, in
Heart pipe and the second mandrel coaxial line；The lower end of the central through hole of the top connection is enlarging shape, the central through hole of the piston
Upper end is enlarging shape；First mandrel is provided with radial direction pressure releasing hole, and the radial direction pressure releasing hole is located at the piston and saved with locking
Between set.
The utility model can also use following technical measures：
Also include locking cap, the top and bottom of the locking cap are respectively provided with internal thread, the lower end tool of the locking section set
There is external screw thread, the upper end of the transition joint has external screw thread, and the upper end of the locking cap and the lower end of the locking section set connect
Connect, the lower end of the locking cap and the upper end of the transition joint are connected through a screw thread.
The utility model has the advantages and positive effects of：
The utility model not only has shock-absorbing function, and integrated buffer structure, has pooling feature, damping, buffering effect is more
It is good.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
In figure：1st, top connection；2nd, outer barrel；3rd, piston；4th, the first mandrel；5th, locking section set；6th, transition joint；7th, overcoat
Pipe；8th, central tube；9th, damping spring；10th, the second mandrel；11st, shear pin；12nd, radial direction pressure releasing hole；13rd, locking cap.
Embodiment
For invention, features and effects of the present utility model can be further appreciated that, following examples are hereby enumerated, and coordinate
Accompanying drawing describes in detail as follows：
Referring to Fig. 1, a kind of downhole testing instrument protection device, including top connection 1, outer barrel 2, piston 3, the first mandrel 4,
Locking section set 5, transition joint 6, outer tube 7, central tube 8, the mandrel 10 of damping spring 9 and second.
The top connection 1 has central through hole, and the lower end of the top connection 1 has external screw thread, and the outer barrel 2 has center
Through hole, the both ends of the outer barrel 2 have internal thread, and the lower end of the top connection 1 and the upper end of the outer barrel 2 are connected by screw thread
Connect, seal is provided between the top connection 1 and the outer barrel 2.
The locking section set 5 has central through hole, and the upper end of the locking section set 5 has external screw thread, the locking section set 5
Upper end and the lower end of the outer barrel 2 be connected through a screw thread, the outer barrel 2 and it is described locking section set 5 between be provided with seal.
The piston 3 has central through hole, and the piston 3 is fitted in the outer barrel 2, the outer wall of the piston 3 and institute
State and be provided with seal between the inwall of outer barrel 2.
First mandrel 4 has central through hole, and first mandrel 4 is inserted into the locking section set 5, and described first
The upper end of mandrel 4 is connected with the piston 3, and seal is provided between first mandrel 4 and the locking section set 5.
The lower end of first mandrel 4 has external screw thread, and the transition joint 6 has central through hole, the transition joint 6
Upper end there is internal thread, the lower end of first mandrel 4 and the upper end of the transition joint 6 are connected through a screw thread.
The lower end of the transition joint 6 has external screw thread, and the upper end of the outer tube 7 has internal thread, the outer tube 7
Upper end and the lower end of the transition joint 6 be connected through a screw thread, between the transition joint 6 and the outer tube 7 be provided with it is close
Sealing.
The lower end of the transition joint 6 has internal thread, and the upper end of the central tube 8 has external screw thread, the central tube 8
Upper end and the lower end of the transition joint 6 be connected through a screw thread, between the transition joint 6 and the central tube 8 be provided with it is close
Sealing.In the present embodiment, the seal is O-ring.
Annulus chamber is formed between the outer tube 7 and the central tube 8, second mandrel 10 has central through hole,
The top of second mandrel 10 is inserted into the annulus intracavitary, between second mandrel 10 and the outer tube 7, described
Seal is provided between second mandrel 10 and the central tube 8, the bottom of the outer tube 7 is provided with the fixed outer tube and institute
State the shear pin 11 of the second mandrel 10.
The damping spring 9 is located at the annulus intracavitary.
The top connection 1, outer barrel 2, piston 3, the first mandrel 4, locking section set 5, transition joint 6, the core of central tube 8 and second
The coaxial line of axle 10.
The lower end of the central through hole of the top connection 1 is enlarging shape, and the upper end of the central through hole of the piston 3 is enlarging
Shape.
First mandrel 4 is provided with radial direction pressure releasing hole 12, and the radial direction pressure releasing hole 12 is located at the piston 3 and saved with locking
Between set 5.
The utility model is connected to by G.I.H between perforator and oil pipe string by the mandrel 10 of top connection 1 and second,
When tubing string is impacted by the detonation initiation of bottom perforator, altered on the second mandrel 10, cut shear pin 10, extrude reducing bullet
Spring.Be stressed between piston 3 and top connection 1 close, the enlarging of the central tube of enlarging Yu the top connection 1 of the central tube of piston 3 it
Between the chamber volume that is formed diminish, oil is discharged from radial direction pressure releasing hole, and buffering is realized with this.
Also include locking cap 13, the top and bottom of the locking cap 13 are respectively provided with internal thread, and the locking section is covered under 5
End has external screw thread, and the upper end of the transition joint 6 has external screw thread, the upper end of the locking cap 13 and the locking section set 6
Lower end connection, the lower end of the locking cap 13 and the upper end of the transition joint 6 are connected through a screw thread.The locking cap 6 is used
Buffered in limitation.
Claims (2)
- A kind of 1. downhole testing instrument protection device, it is characterised in that：Including top connection (1), outer barrel (2), piston (3), first Mandrel (4), locking section set (5), transition joint (6), outer tube (7), central tube (8), damping spring (9) and the second mandrel (10)；The top connection (1) has a central through hole, during there is external screw thread, the outer barrel (2) to have for the lower end of the top connection (1) Heart through hole, the both ends of the outer barrel (2) have internal thread, and the lower end and the upper end of the outer barrel (2) of the top connection (1) pass through Threaded connection, is provided with seal between the top connection (1) and the outer barrel (2)；The locking section set (5) has central through hole, and the upper end of the locking section set (5) has external screw thread, the locking section set (5) lower end of upper end and the outer barrel (2) is connected through a screw thread, and is provided between the outer barrel (2) and the locking section set (5) Seal；The piston (3) has central through hole, and the piston (3) is fitted in the outer barrel (2), the outer wall of the piston (3) Seal is provided between the inwall of the outer barrel (2)；First mandrel (4) has a central through hole, and first mandrel (4) is inserted into the locking section set (5), and described the The upper end of one mandrel (4) is connected with the piston (3), and sealing is provided between first mandrel (4) and the locking section set (5) Part；The lower end of first mandrel (4) has external screw thread, and the transition joint (6) has central through hole, the transition joint (6) upper end has internal thread, and the lower end and the upper end of the transition joint (6) of first mandrel (4) are connected through a screw thread；The lower end of the transition joint (6) has external screw thread, and the upper end of the outer tube (7) has internal thread, the outer tube (7) lower end of upper end and the transition joint (6) is connected through a screw thread, the transition joint (6) and the outer tube (7) it Between be provided with seal；The lower end of the transition joint (6) has internal thread, and the upper end of the central tube (8) has external screw thread, the central tube (8) lower end of upper end and the transition joint (6) is connected through a screw thread, the transition joint (6) and the central tube (8) it Between be provided with seal；Annulus chamber is formed between the outer tube (7) and the central tube (8), second mandrel (10) is led to center Hole, the top of second mandrel (10) are inserted into the annulus intracavitary, second mandrel (10) and the outer tube (7) Between, be provided with seal between second mandrel (10) and the central tube (8), the bottom of the outer tube (7) is provided with solid The shear pin (11) of the fixed outer tube (7) and second mandrel (10)；The damping spring (9) is located at the annulus intracavitary；The top connection (1), outer barrel (2), piston (3), the first mandrel (4), locking section set (5), transition joint (6), central tube And the second mandrel (10) coaxial line (8)；The lower end of the central through hole of the top connection (1) is enlarging shape, and the upper end of the central through hole of the piston (3) is enlarging Shape；First mandrel (10) is provided with radial direction pressure releasing hole (12), the radial direction pressure releasing hole (12) be located at the piston (3) with Between locking section set (5).
- 2. downhole testing instrument protection device according to claim 1, it is characterised in that：Also include locking cap (13), institute The top and bottom for stating locking cap (13) are respectively provided with internal thread, and the lower end of the locking section set (5) has external screw thread, the centre The upper end of joint (6) has external screw thread, and the upper end of the locking cap (13) is connected with the lower end of the locking section set (5), described The lower end of locking cap (13) and the upper end of the transition joint (6) are connected through a screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720331172.6U CN206668248U (en) | 2017-03-28 | 2017-03-28 | A kind of downhole testing instrument protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720331172.6U CN206668248U (en) | 2017-03-28 | 2017-03-28 | A kind of downhole testing instrument protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206668248U true CN206668248U (en) | 2017-11-24 |
Family
ID=60367403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720331172.6U Expired - Fee Related CN206668248U (en) | 2017-03-28 | 2017-03-28 | A kind of downhole testing instrument protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206668248U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109458029A (en) * | 2018-11-06 | 2019-03-12 | 安康学院 | A kind of damping device of civil engineering structure |
-
2017
- 2017-03-28 CN CN201720331172.6U patent/CN206668248U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109458029A (en) * | 2018-11-06 | 2019-03-12 | 安康学院 | A kind of damping device of civil engineering structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171124 Termination date: 20210328 |