CN208845132U - Sealing fluid coring lower piston can be perfused - Google Patents
Sealing fluid coring lower piston can be perfused Download PDFInfo
- Publication number
- CN208845132U CN208845132U CN201821473202.8U CN201821473202U CN208845132U CN 208845132 U CN208845132 U CN 208845132U CN 201821473202 U CN201821473202 U CN 201821473202U CN 208845132 U CN208845132 U CN 208845132U
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- Prior art keywords
- lower piston
- sealing fluid
- coring
- perfused
- liquid
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Abstract
The utility model discloses one kind, and sealing fluid coring lower piston can be perfused comprising lower piston and ball-and-seat；It is provided in the axial direction with blind hole from lower piston top surface, and reduction is formed with closed sap cavity, liquid flowing control channel and liquid feed pathway to the internal diameter of blind hole step by step from top to bottom；Inlet opening is radially offered on lower piston lower sides, inlet opening is connected with liquid feed pathway；Ball-and-seat setting makes outside liquid be merely able to flow into closed sap cavity by liquid feed pathway in liquid flowing control channel；This can be perfused that sealing fluid is easy to operate with coring lower piston, gas discharge is convenient, is conducive to the sealed coring lower piston that sealing fluid is fast and safely perfused, it needs that sealing fluid is perfused from well head when solving sealing core drilling and gas is not easy the technical problem escaped from sealing fluid, when progress sealing core drilling needs to pour into sealing fluid, it is intracavitary and ensure liquid internal there is no gas that sealing fluid can be quickly injected into sealing fluid by the coring lower piston, realizes convenient, safe infusion sealing fluid operation.
Description
Technical field
The utility model relates to the CORING TECHNOLOGY field of petroleum geology exploration drilling well, in particular to sealing fluid can be perfused in one kind
With coring lower piston.
Background technique
In existing sealed coring technique, dummy piston, sealing ring, top connection group, inner cylinder, clip group, seal head group,
Sealing fluid in drill bit and coring inner drum forms confined space, interior as rock core constantly enters inner cylinder during coring
The rock core for being entered inner cylinder is squeezed substitution by the taking up space for sealing fluid in tube inner chamber.It is most of closed however before lower brill
Coring tool needs to mention inner cylinder outside outer cylinder, pours into sealing fluid from well head.After sealing fluid is filled, it is put into dummy piston,
After connecting inner cylinder related components, tool is just put into outer cylinder, thread up.However, by inner cylinder from outer cylinder proposition pour into it is closed
The method of liquid is time-consuming and laborious and easily in inside, envelope renews a large amount of bubbles from well head perfusion sealing fluid, exists in coring constructing operation
Insecurity factor.In order to which sealing fluid is preferably perfused, need to develop a kind of coring lower piston device that sealing fluid can be perfused.
Utility model content
The purpose of the utility model is to provide need that sealing fluid and gas is perfused not from well head when a kind of solution sealing core drilling
Sealing fluid coring lower piston easily is perfused from sealing fluid evolution problem.
For this purpose, technical solutions of the utility model are as follows:
Sealing fluid coring lower piston, including lower piston and ball-and-seat can be perfused in one kind；Wherein, from the lower piston top surface
It is provided in the axial direction with blind hole, and reduction is formed with closed sap cavity, liquid flowing control to the internal diameter of the blind hole step by step from top to bottom
Channel and liquid feed pathway；Radially offer inlet opening on the lower piston lower sides, the inlet opening with it is described
Liquid feed pathway is connected；The ball-and-seat setting makes outside liquid be merely able to pass through in liquid flowing control channel
The liquid feed pathway flows into closed sap cavity.
Further, the ball-and-seat includes the closure being successively set in the liquid flowing control channel from bottom to top
Ball, spring and pressure ring；Wherein, the pressure ring is fixed on the liquid flowing control channel inner wall, the outer diameter of the ball sealer
Be adapted with the internal diameter of the liquid feed pathway, make the both ends of the spring be against on the bottom end end face of the pressure ring respectively and
On the top surface of the ball sealer, by liquid feed pathway described in ball sealer tight closure.
Further, at least one of packing holder is along the circumferential direction offered in the external wall of upper portion of the lower piston,
Inside it is provided with O-ring seal.
Further, the internal diameter of the outer diameter of the lower piston and upper piston is adapted, and is sleeved on the upper piston described
Lower piston upper outside, and sealing cooperation is formed by being arranged between sealing ring and lower piston on the lower piston outer wall.
Further, 2~3 are along the circumferential direction uniformly offered on the lower piston outer wall being located above the inlet opening
Pin hole.
Further, the seal plug for blocking inlet opening is provided in the inlet opening.
Compared with prior art, this can be perfused that sealing fluid coring lower piston is easy to operate, gas discharge is convenient, is conducive to
The sealed coring lower piston that sealing fluid is fast and safely perfused needs that sealing fluid and gas is perfused from well head when solving sealing core drilling
It is not easy the technical problem escaped from sealing fluid, when progress sealing core drilling needs to pour into sealing fluid, which can be incited somebody to action
It is intracavitary and ensure that liquid internal there is no gas, realizes convenient, safe infusion sealing fluid that sealing fluid is quickly injected into sealing fluid
Operation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that sealing fluid coring lower piston is perfused of the utility model.
Specific embodiment
With reference to the accompanying drawing and specific embodiment is described further the utility model, but following embodiments are right absolutely not
The utility model has any restrictions.
As shown in Figure 1, it includes lower piston 1, ball-and-seat 2 and seal plug 3 that sealing fluid coring lower piston, which can be perfused, in this；Tool
Body,
It is the cylinder that bottom surface is processed as cambered surface from lower piston 1, is provided in the axial direction with blind hole from its top surface, and blind hole is interior
Diameter reduces step by step from top to bottom forms closed sap cavity, liquid flowing control channel and liquid feed pathway；Wherein, closed sap cavity
The volume of internal diameter and its liquid to be perfused is adapted；
The setting of ball-and-seat 2 is merely able to outside liquid by liquid feed pathway stream in liquid flowing control channel
Enter closed sap cavity；Wherein, ball-and-seat 2 includes the ball sealer 201 being successively set in liquid flowing control channel from bottom to top, bullet
Spring 202 and pressure ring 203；Wherein, pressure ring 203 be fixed on liquid flowing control channel inner wall on, make pressure ring 203 top end face and
The cavity bottom surface of closed sap cavity flushes；The outer diameter of ball sealer 201 and the internal diameter of liquid feed pathway are adapted, and liquid flowing control
The cavity bottom surface in channel processed is processed as the conical surface being adapted with 201 shape of ball sealer, is press-fitted to ball sealer 201 at the conical surface；Bullet
The top and bottom end of spring 202 are against on the bottom end end face of pressure ring 203 respectively and on the top surface of ball sealer 201, make ball sealer 201 tight
Liquid feed pathway is blocked in sealing；
Inlet opening is radially offered on 1 lower sides of lower piston, and inlet opening is connected with liquid feed pathway, makes
It is intracavitary that outside liquid can pass sequentially through inlet opening, liquid feed pathway and liquid flowing control channel inflow sealing fluid；Sealing
Plug 3 is arranged in inlet opening to block inlet opening.
Lower piston 1 and the upper piston above it are set with and connect, and the internal diameter of outer diameter and upper piston is adapted, and make upper piston set
Mounted in 1 upper outside of lower piston, and double sealing ring support 4 is along the circumferential direction offered in the external wall of upper portion of lower piston 1, pass through
The O-ring seal being arranged in double sealing ring support 4, which makes to be set with, forms sealing company between the lower piston 1 being integrated and upper piston
It connects.
In addition, along the circumferential direction uniformly opening up on 1 outer wall of lower piston being located above inlet opening, there are three pin holes 5, make
It is connected and fixed with core bit by pin.
The application method of sealing fluid coring lower piston can be perfused in this: sealing fluid is added: in coring lower piston in tripping in
Before cylinder, coring lower piston is placed on ramp, opens seal plug 3, connects hydraulic pump pipeline.After turn on pump, sealing fluid via into
Check valve 2 in fluid apertures, feed pathway and liquid flowing control channel is eventually entered into closed sap cavity, when sealing fluid fills
Afterwards, pipeline is dismantled, fills in seal plug 3 in inlet opening again；Sealing fluid implant operation finishes, and coring lower piston is packed into inner cylinder
In, on coring lower piston top, installation upper piston makes inner cylinder form sealing fluid chamber, prevents sealing fluid from flowing into from inner cylinder external；Coring
The lower part of lower piston is fixed by pin and coring bit, can carry out next step operation at this time.Sealing core drilling operation: it is taking
Before heart job execution, to prevent sealing fluid from flowing out, coring lower piston and coring bit fixing pin are cut in pressurization, can start to take
Heart operation.
Claims (6)
1. sealing fluid coring lower piston can be perfused in one kind, which is characterized in that including lower piston (1) and ball-and-seat (2)；Wherein,
Be provided in the axial direction with blind hole from the lower piston (1) top surface, and the internal diameter of the blind hole reduce step by step from top to bottom be formed with it is close
Close sap cavity, liquid flowing control channel and liquid feed pathway；Radially offered on the lower piston (1) lower sides into
Fluid apertures, the inlet opening are connected with the liquid feed pathway；Ball-and-seat (2) setting is flowing control channel in liquid
It is interior, make outside liquid be merely able to flow into closed sap cavity by the liquid feed pathway.
2. according to claim 1 be perfused sealing fluid coring lower piston, which is characterized in that ball-and-seat (2) packet
Include ball sealer (201), spring (202) and the pressure ring (203) being successively set in the liquid flowing control channel from bottom to top；
Wherein, the pressure ring (203) is fixed on the liquid flowing control channel inner wall, the outer diameter of the ball sealer (201) and institute
The internal diameter for stating liquid feed pathway is adapted, and the both ends of the spring (202) is made to be against the bottom end end of the pressure ring (203) respectively
On on the face and top surface of the ball sealer (201), by liquid feed pathway described in ball sealer (201) tight closure.
3. according to claim 1 be perfused sealing fluid coring lower piston, which is characterized in that in the lower piston (1)
External wall of upper portion on along the circumferential direction offer at least one of packing holder (4), O-ring seal is arranged inside.
4. according to claim 3 be perfused sealing fluid coring lower piston, which is characterized in that the lower piston (1)
The internal diameter of outer diameter and upper piston is adapted, and so that the upper piston is sleeved on the lower piston (1) upper outside, and exist by setting
Sealing cooperation is formed between sealing ring and lower piston (1) on lower piston (1) outer wall.
5. according to claim 1 be perfused sealing fluid coring lower piston, which is characterized in that be located at the inlet opening
2~3 pin holes (5) are along the circumferential direction uniformly offered on lower piston (1) outer wall of top.
6. according to claim 1 be perfused sealing fluid coring lower piston, which is characterized in that set in the inlet opening
It is equipped with the seal plug (3) for blocking inlet opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821473202.8U CN208845132U (en) | 2018-09-10 | 2018-09-10 | Sealing fluid coring lower piston can be perfused |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821473202.8U CN208845132U (en) | 2018-09-10 | 2018-09-10 | Sealing fluid coring lower piston can be perfused |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208845132U true CN208845132U (en) | 2019-05-10 |
Family
ID=66371710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821473202.8U Expired - Fee Related CN208845132U (en) | 2018-09-10 | 2018-09-10 | Sealing fluid coring lower piston can be perfused |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208845132U (en) |
-
2018
- 2018-09-10 CN CN201821473202.8U patent/CN208845132U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201119 Address after: 300457 Tianjin Binhai New Area Development Zone No. second, No. 83, China Petroleum Tianjin building Bohai Drilling Engineering Co., Ltd. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Patentee after: CHINA NATIONAL PETROLEUM Corp. Address before: 300457 Tianjin Binhai New Area Development Zone No. second, No. 83, China Petroleum Tianjin building Bohai Drilling Engineering Co., Ltd. Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190510 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |