CN205025410U - Injection apparatus is prevented to oil well - Google Patents
Injection apparatus is prevented to oil well Download PDFInfo
- Publication number
- CN205025410U CN205025410U CN201520732141.2U CN201520732141U CN205025410U CN 205025410 U CN205025410 U CN 205025410U CN 201520732141 U CN201520732141 U CN 201520732141U CN 205025410 U CN205025410 U CN 205025410U
- Authority
- CN
- China
- Prior art keywords
- blowout prevention
- well
- well head
- polished rod
- sealing device
- 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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Abstract
The utility model discloses an injection apparatus is prevented to oil well, seal the ware and wear to establish the polished rod in the sealed ware of well head including the well head, inside being provided with of the sealed ware of well head can supply polished rod male passageway, the upper end of the sealed ware of well head is provided with the step, step department is provided with and prevents spouting the cover, prevent spouting the inner wall and polished rod laminating of cover, the upper end of the sealed ware of well head is connected with the closing cap, be provided with the boss on the lower terminal surface of closing cap, boss and the sealed ware spiro union of well head, the lower extreme of boss offsets with preventing the upper end of spouting the cover, it is provided with and prevents spouting the structure to prevent spouting set inside, the utility model discloses can effectively avoid the emergence of well head jet phenomenon, and can effectively avoid well liquid to cause the pollution to the environment.
Description
Technical field
The utility model belongs to well mouth of oil well auxiliary sealing device technical field, relates to a kind of oil well blowout-prevention injection device.
Background technology
In rod-pumped well production operation, waste and pollution is produced for ensureing that fluid does not take on ground by reciprocating polished rod, generally can seal the well head section of polished rod, existing sealing device is on wellhead sealing device, have two-stage well head sealing packing, be respectively one-level packing and secondary packing, wherein be connected with secondary packing regulating handle outside secondary packing, when oil well is normally produced, secondary packing is in opening (having gap with polished rod) by the adjustment of handle; One-level packing is turriform double packing, the intrinsic wellhead packing box gland of spiral shell on it, when oil well is normally produced, one-level packing_seal polished rod, by by the fluid on polished rod band to terminating in below one-level packing.The design bearing pressure of one-level packing is about 1MPa.
Usually, when oil well is normally produced, fuel-displaced back pressure is no more than 0.5MPa, and when producing so normal, well head one-level packing place seldom misses fluid.But when oil pipeline is abnormal or Liquid output is too high, the fuel-displaced back pressure of oil well can raise, if back pressure exceedes the design bearing pressure of one-level packing, then there is well head oil spout risk; In addition, produce wearing and tearing after packing Long-Time Service, also may cause well Suo accident.And once there is well Suo accident, adding the fluid that Suo goes out spreads with the wind, large area environment pollution will be caused.If field personnel prevents by force to it during well Suo, staff is also likely made to cause personal injury.
Summary of the invention
For the problems referred to above, the technical problems to be solved in the utility model is to provide a kind of generation effectively can avoiding well head jet phenomenon, and well liquid can be made along vias inner walls to be back to oil well blowout-prevention injection device in well.
Oil well blowout-prevention injection device of the present utility model, comprise wellhead sealing device and be located in the polished rod in wellhead sealing device, described wellhead sealing device inside is provided with the passage that can insert for polished rod, the upper end of described wellhead sealing device is provided with step, described step place is provided with blowout prevention cover, inwall and the polished rod of described blowout prevention cover are fitted, the upper end of described wellhead sealing device is connected with capping, the lower surface of described capping is provided with boss, described boss and wellhead sealing device are spirally connected, the upper end that the lower end of described boss and blowout prevention are overlapped offsets, described blowout prevention cover inside is provided with blowout prevention structure.
Oil well blowout-prevention injection device of the present utility model, wherein, described blowout prevention cover inside is provided with blowout prevention structure and refers to, the inwall of described blowout prevention cover is provided with spiral helicine groove, and described groove communicates with passage and arranges.
Oil well blowout-prevention injection device of the present utility model, wherein, described blowout prevention cover is made up of elastomeric material.
The utility model beneficial effect: a kind of generation effectively can avoiding well head jet phenomenon of the present utility model, and well liquid can be made along vias inner walls to be back to oil well blowout-prevention injection device in well, by the setting that blowout prevention is overlapped, and blowout prevention structure is set in blowout prevention cover inside, namely the inwall of blowout prevention cover is provided with spiral helicine groove, described groove communicates with passage and arranges, when well liquid to be taken to the upper end of wellhead sealing device by polished rod, blowout prevention cover can play keeps out effect to well liquid, and the well liquid that wellhead sealing device upper end is left can flow back in well along helical groove, effectively can avoid the generation of well head jet phenomenon, and can effectively avoid well liquid to environment.
Accompanying drawing explanation
For ease of illustrating, the utility model is described in detail by following concrete enforcement and accompanying drawing.
Fig. 1 is sectional structure schematic diagram of the present utility model.
Detailed description of the invention
Oil well blowout-prevention injection device as shown in Figure 1, the polished rod 2 comprising wellhead sealing device 1 and be located in wellhead sealing device 1, described wellhead sealing device 1 inside is provided with the passage 11 that can insert for polished rod 2, the upper end of described wellhead sealing device 1 is provided with step 12, described step 12 place is provided with blowout prevention cover 3, inwall and the polished rod 2 of described blowout prevention cover 3 are fitted, the upper end of described wellhead sealing device 1 is connected with capping 4, the lower surface of described capping 4 is provided with boss 41, described boss 41 is spirally connected with wellhead sealing device 1, the upper end that the lower end of described boss 41 and blowout prevention overlap 3 offsets, described blowout prevention is overlapped 3 inside and is provided with blowout prevention structure, described blowout prevention is overlapped 3 inside and is provided with blowout prevention structure and refers to, the inwall of described blowout prevention cover 3 is provided with spiral helicine groove 31, described groove 31 communicates with passage 11 and arranges, described blowout prevention cover 3 is made up of elastomeric material, by the setting that blowout prevention is overlapped, and blowout prevention structure is set in blowout prevention cover inside, namely the inwall of blowout prevention cover is provided with spiral helicine groove, described groove communicates with passage and arranges, when well liquid to be taken to the upper end of wellhead sealing device by polished rod, blowout prevention cover can play keeps out effect to well liquid, and the well liquid that wellhead sealing device upper end is left can flow back in well along helical groove, effectively can avoid the generation of well head jet phenomenon, and can effectively avoid well liquid to environment.
Embodiment recited above is only be described preferred embodiment of the present utility model, not limits design of the present utility model and scope.Under the prerequisite not departing from the utility model design concept; the various modification that this area ordinary person makes the technical solution of the utility model and improvement; protection domain of the present utility model all should be dropped into; the technology contents of the utility model request protection, all records in detail in the claims.
Claims (2)
1. an oil well blowout-prevention injection device, it is characterized in that: comprise wellhead sealing device (1) and be located in the polished rod (2) in wellhead sealing device (1), described wellhead sealing device (1) inside is provided with the passage (11) that polished rod (2) can be supplied to insert, the upper end of described wellhead sealing device (1) is provided with step (12), described step (12) place is provided with blowout prevention cover (3), inwall and the polished rod (2) of described blowout prevention cover (3) are fitted, the upper end of described wellhead sealing device (1) is connected with capping (4), the lower surface of described capping (4) is provided with boss (41), described boss (41) and wellhead sealing device (1) are spirally connected, the lower end of described boss (41) and the upper end of blowout prevention cover (3) offset, described blowout prevention cover (3) inside is provided with blowout prevention cover (3) inside described in blowout prevention structure and is provided with blowout prevention structure and refers to, the inwall of described blowout prevention cover (3) is provided with spiral helicine groove (31), described groove (31) communicates with passage (11) and arranges.
2. oil well blowout-prevention injection device according to claim 1, is characterized in that: described blowout prevention cover (3) is made up of elastomeric material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520732141.2U CN205025410U (en) | 2015-09-12 | 2015-09-12 | Injection apparatus is prevented to oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520732141.2U CN205025410U (en) | 2015-09-12 | 2015-09-12 | Injection apparatus is prevented to oil well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205025410U true CN205025410U (en) | 2016-02-10 |
Family
ID=55257953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520732141.2U Expired - Fee Related CN205025410U (en) | 2015-09-12 | 2015-09-12 | Injection apparatus is prevented to oil well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205025410U (en) |
-
2015
- 2015-09-12 CN CN201520732141.2U patent/CN205025410U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20160210 Termination date: 20160912 |