CN204532226U - Two pressure reduction blowout hookup - Google Patents
Two pressure reduction blowout hookup Download PDFInfo
- Publication number
- CN204532226U CN204532226U CN201520260462.7U CN201520260462U CN204532226U CN 204532226 U CN204532226 U CN 204532226U CN 201520260462 U CN201520260462 U CN 201520260462U CN 204532226 U CN204532226 U CN 204532226U
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- China
- Prior art keywords
- sleeve pipe
- seal body
- level
- tube connector
- negative pressure
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Abstract
The utility model relates to a kind of two pressure reduction blowout hookup.Mainly solve existing blowout prevention box when down-hole liquid excess flow, pressure are excessive can from upper end outside overflow and the problem of contaminated environment.It is characterized in that: described working pipe (14) upper end is connected with tube connector (11) by box cupling (13), described tube connector (11) inside is equipped with primary seal body (12), and the tube connector (11) of primary seal body (12) upper end is connected with one-level sleeve pipe (7); Described one-level sleeve pipe (7) inside is equipped with secondary seal body (8), and the one-level sleeve pipe (7) of secondary seal body (8) upper end is connected with secondary sleeve pipe (3); Described secondary sleeve pipe (3) inside is equipped with three grades of seals (5), and the secondary sleeve pipe (3) on three grades of seal (5) tops is connected with packing pressure cap (1).This pair of pressure reduction blowout hookup inside is provided with two negative pressure cavities, and liquid can be avoided to be overflowed by packing box top and pollute Active workings.
Description
Technical field
The utility model relates to oilfield, specifically a kind of two pressure reduction blowout hookup.
Background technology
Oil field is when well logging, well testing, well head can produce overflow, because current blowout prevention box top only has an overfall, operationally, when the fluid flow of down-hole, pressure are excessive, can from the outside overflow of the packing pressure cap of upper end, the liquid overflowed, more than 10 rice high be scattered in operation field in the air, winter frostbite, summer drenched operating personnel, and polluted environment.
Summary of the invention
In order to overcome existing blowout prevention box when down-hole liquid excess flow, pressure are excessive can from upper end outside overflow and the deficiency of contaminated environment, the utility model provides a kind of two pressure reduction blowout hookup, this pair of pressure reduction blowout hookup inside is provided with two negative pressure cavities, and liquid can be avoided to be overflowed by packing box top and pollute Active workings.
The technical solution of the utility model is: a kind of two pressure reduction blowout hookup, comprise the working pipe be connected on well head, described working pipe upper end is connected with tube connector by box cupling, working pipe inside is provided with choke tube, and having gap between working pipe and choke tube, described choke tube upper end is connected with tube connector internal whorl; Described tube connector inside is equipped with primary seal body, and the tube connector of primary seal body upper end is connected with one-level sleeve pipe; Described one-level inside pipe casing is equipped with secondary seal body, and the one-level sleeve pipe of secondary seal body upper end is connected with secondary sleeve pipe; Described secondary inside pipe casing is equipped with three grades of seals, and the secondary sleeve pipe on three grades of seal tops is connected with packing pressure cap;
Form one-level negative pressure cavity between described primary seal body and secondary seal body, and one-level sleeve side walls corresponding to one-level negative pressure cavity has one-level overfall; Form secondary negative pressure cavity between described secondary seal body and three grades of seals, and secondary sleeve side walls corresponding to secondary negative pressure cavity has secondary overfall.
The utility model has following beneficial effect: owing to taking such scheme, working pipe upper end is connected with tube connector, tube connector upper end connects one-level sleeve pipe, secondary sleeve pipe successively, one-level, secondary, secondary seal body is equipped with respectively in tube connector, one-level sleeve pipe and secondary sleeve pipe, form one-level negative pressure cavity, secondary negative pressure cavity successively from the bottom to top, effect in conjunction with outside high-pressure vacuum pump makes to form negative pressure in I and II negative pressure cavity, liquid in it is flowed out by pipeline, thus avoids being overflowed by packing box top and polluting Active workings.This pair of pressure reduction blowout hookup is at the scene in operation, and airtight negative pressure is run, and can reach that high-altitude no liquid falls, construction plant no liquid, achieves no pollution operation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
1-packing pressure cap in figure, 2-operation cable, 3-secondary sleeve pipe, 4-secondary overfall, 5-tri-grades of seals, 6-secondary negative pressure cavity, 7-one-level sleeve pipe, 8-secondary seal body, 9-one-level negative pressure cavity, 10-one-level overfall, 11-tube connector, 12-primary seal body, 13-box cupling, 14-working pipe, 15-choke tube.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, a kind of two pressure reduction blowout hookup, comprise operation cable 2, the working pipe 14 be connected on well head, described working pipe 14 upper end is connected with tube connector 11 by box cupling 13, working pipe 14 inside is provided with choke tube 15, and having gap between working pipe 14 and choke tube 15, described choke tube 15 upper end is connected with tube connector 11 internal whorl.The cavity of described tube connector 11 inside is built-in with primary seal body 12, the tube connector 11 of primary seal body 12 upper end is connected with one-level sleeve pipe 7, namely primary seal body 12 is positioned at one-level sleeve pipe 7 lower end, is compressed by primary seal body 12 after one-level sleeve pipe 7 is threaded with tube connector 11.Described one-level sleeve pipe 7 inside is equipped with secondary seal body 8, and the one-level sleeve pipe 7 of secondary seal body 8 upper end is connected with secondary sleeve pipe 3; The secondary sleeve pipe 3 that described secondary sleeve pipe 3 inside is equipped with three grades of seals, 5, three grades of seal 5 tops is connected with packing pressure cap 1, and packing pressure cap 1 tightens rear compression three grades of seals 5.Described operation cable 2 enters well head through after three grades of seals 5, secondary seal body 8, primary seal body 12 and choke tubes 15 successively.
The cavity formed between described primary seal body 12 and secondary seal body 8 is called one-level negative pressure cavity 9, and one-level sleeve pipe 7 sidewall corresponding to one-level negative pressure cavity 9 has one-level overfall 10; The cavity formed between described secondary seal body 12 and three grades of seals 5 is called secondary negative pressure cavity 6, and secondary sleeve pipe 3 sidewall corresponding to secondary negative pressure cavity 6 has secondary overfall 4.Described one-level overfall 10 and secondary overfall 4 are all connected with high-pressure vacuum pump by pipeline.
When well logging, well testing operation, logging instrument cable is allowed to transfer to the operations such as each depth test parameter of down-hole of a few km, when opening well logging valve, the liquid of down-hole is under the pressure effect of 10-30 Mpa, upwards flowing can be full of working pipe, and upwards overflow along choke tube 15, gap between seal at different levels and operation cable.Now, open high-pressure vacuum pump, under the swabbing action of high-pressure vacuum pump, the liquid of overflow enters into the rear major part of one-level negative pressure cavity 9 and can be flowed out by one-level overfall 10, a small amount of liquid is followed operation cable 2 liquid and is entered secondary negative pressure cavity 6, is flowed out by secondary overfall 4.The liquid flowed out by I and II overfall enters into filtration surge tank through high-pressure vacuum pump, then is recycled in well by high pressure re-injection pump.In the process, due to the effect of high-pressure vacuum pump, in I and II negative pressure cavity, produce negative pressure, the liquid in it can be flowed away fast, avoid being taken to top and contaminated environment by operation cable 2.Meanwhile, in secondary negative pressure cavity 6 under suction function, air enters into secondary negative pressure cavity 6 from the gap between three grades of seals 5 and operation cable 2, has dried up the moisture on operation cable 2, further avoids operation cable 2 to be driven outside well by liquid.
Claims (1)
1. a two pressure reduction blowout hookup, comprise the working pipe (14) be connected on well head, it is characterized in that: described working pipe (14) upper end is connected with tube connector (11) by box cupling (13), working pipe (14) inside is provided with choke tube (15), and having gap between working pipe (14) and choke tube (15), described choke tube (15) upper end is connected with tube connector (11) internal whorl; Described tube connector (11) inside is equipped with primary seal body (12), and the tube connector (11) of primary seal body (12) upper end is connected with one-level sleeve pipe (7); Described one-level sleeve pipe (7) inside is equipped with secondary seal body (8), and the one-level sleeve pipe (7) of secondary seal body (8) upper end is connected with secondary sleeve pipe (3); Described secondary sleeve pipe (3) inside is equipped with three grades of seals (5), and the secondary sleeve pipe (3) on three grades of seal (5) tops is connected with packing pressure cap (1);
Form one-level negative pressure cavity (9) between described primary seal body (12) and secondary seal body (8), and one-level sleeve pipe (7) sidewall corresponding to one-level negative pressure cavity (9) has one-level overfall (10); Form secondary negative pressure cavity (6) between described secondary seal body (12) and three grades of seals (5), and secondary sleeve pipe (3) sidewall corresponding to secondary negative pressure cavity (6) has secondary overfall (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520260462.7U CN204532226U (en) | 2015-04-27 | 2015-04-27 | Two pressure reduction blowout hookup |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520260462.7U CN204532226U (en) | 2015-04-27 | 2015-04-27 | Two pressure reduction blowout hookup |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204532226U true CN204532226U (en) | 2015-08-05 |
Family
ID=53746249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520260462.7U Active CN204532226U (en) | 2015-04-27 | 2015-04-27 | Two pressure reduction blowout hookup |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204532226U (en) |
-
2015
- 2015-04-27 CN CN201520260462.7U patent/CN204532226U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |