CN101598008A - Heat injection tubing string top switch valve gear in the thermal production well mouth - Google Patents
Heat injection tubing string top switch valve gear in the thermal production well mouth Download PDFInfo
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- CN101598008A CN101598008A CNA2009100867203A CN200910086720A CN101598008A CN 101598008 A CN101598008 A CN 101598008A CN A2009100867203 A CNA2009100867203 A CN A2009100867203A CN 200910086720 A CN200910086720 A CN 200910086720A CN 101598008 A CN101598008 A CN 101598008A
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- tubing string
- valve
- injection tubing
- heat injection
- top switch
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Abstract
The invention discloses heat injection tubing string top switch valve gear in a kind of thermal production well mouth, comprise: with the suitable body of hot fluid tubing string, body is installed on the valve seat, offer the cavity that connects vertically on the described body, also be provided with the ball valve that is used to control described cavity opening and closing on described body, the cock switch that also is provided with the described ball valve opening and closing of control on the described valve seat extends drive link.Be implemented in the thermal recovery well head device and heat injection tubing string top switch valve can cut out, can close and insert the pressure that exists in above heated fluid injection tubing string of anti-pollution back pressure valve tool and the well head production tree.
Description
Technical field
The present invention relates to a kind of heat injection tubing string top switch valve gear that the offshore oilfield heavy oil wells is recovered the oil that is used for.
Background technology
The marine heavy oil reserves of China accounts for 70% of oil in place, mainly is distributed in Bay areas, facts have proved that the best mining type of viscous crude is thermal recovery.Yet, in the hot fluid throughput operation process that the Bohai Bay Oil heavy oil wells is implemented, also expose some problems.Promptly after this well heated fluid injection, the stewing well, because, the heavy oil tested layer formation fluid pressure (back pressure) that is injected into behind the hot fluid is bigger, can not trip out the heated fluid injection tubing string in the short period of time, and need the long time to carry out open flow, kill job, after waiting for that formation fluid pressure (back pressure) reduces, just can trip out the heated fluid injection tubing string.
The well killing fluid that kill job is used, there are two subject matters in the heavy oil tested layer of assembling certain heat for being injected into hot fluid:
1, well killing fluid causes a large amount of heat waste, has a strong impact on the thermal recovery effect of heated fluid injection heavy oil tested layer;
2, well killing fluid causes cold infringement (pollution heavy oil tested layer) again to the heated fluid injection heavy oil tested layer.
In order to address this problem, a kind of anti-pollution back pressure valve tool 10 has been put down in writing in patent application 200910087336.5, shown in Fig. 3,4, comprise: valve body 1, on valve body 1, offer the cavity 6 of the passed hot fluid tubing string that axially connects along valve body 1, but also be provided with the plate valve 2 of elastic packing cavity 6 in valve body 1 bottom.As shown in the figure 3, but here plate valve 2 can by torsion spring mechanism 3 elastic torsions be arranged on the bottom of valve body 1.
After heated fluid injection end-of-job, stewing well, need not carry out open flow, kill job, can trip out the top heated fluid injection tubing string 8 that inserts in the anti-pollution back pressure valve tool 10.And only need to put on portion's heated fluid injection tubing string 8 one single (about 10 meters) approximately above plate valve 2 positions in the anti-pollution back pressure valve tool 10, plate valve 2 cuts out under the effect of torsion spring mechanism 3 and strata pressure (back pressure) immediately, and oil reservoir high-pressure fluid capable of blocking (crude oil, water etc.) can't enter above space, anti-pollution back pressure valve tool 10 positions.
Yet owing to carrying (tripping out) one single (about about 10 meters) afterwards on the top heated fluid injection tubing string that must insert in the anti-pollution back pressure valve tool 10, thoroughly the plate valves in the realization anti-pollution back pressure valve tool 10 cut out.Therefore, the dismounting production tree and on carry (tripping out) first top heated fluid injection tubing string single (about about 10 meters) before, in anti-pollution back pressure valve tool 10 above heated fluid injection tubing strings and well head production tree, still have pressure.
Summary of the invention
The technical problem to be solved in the present invention provides heat injection tubing string top switch valve gear in a kind of thermal production well mouth that uses that matches with anti-pollution back pressure valve, inserts the pressure that exists in above heated fluid injection tubing string of anti-pollution back pressure valve tool and the well head production tree to reduce.
In order to address the above problem, the invention provides the interior heat injection tubing string top switch valve gear of a kind of thermal production well mouth comprises: with the suitable body of hot fluid tubing string, body is installed on the valve seat, offer the cavity that connects vertically on the described body, also be provided with the ball valve that is used to control described cavity opening and closing on described body, the cock switch that also is provided with the described ball valve opening and closing of control on the described valve seat extends drive link.
Preferably, described body is provided with upper ball base and lower ball base, and described ball valve is installed between described upper ball base and the lower ball base.
The present invention has following advantage:
1, is implemented in the thermal recovery well head device and heat injection tubing string top switch valve can cuts out, can close (blocking-up) and insert the pressure that exists in above heated fluid injection tubing string of anti-pollution back pressure valve tool and the well head production tree;
2, realize that interior heat injection tubing string top switch valve gear of thermal production well mouth and the interior anti-pollution back pressure valve tool in down-hole (pit shaft) are used, the plate valve that reaches in the interior anti-pollution back pressure valve in down-hole (pit shaft) cuts out;
3, realize that the back pressure that the heavy oil tested layer stratum is higher separates, under safing condition, for dismounting well head production tree and all trip out and insert the above heated fluid injection tubing string of anti-pollution back pressure valve tool, also establish important effect for subsequent job (as changing-over production wellhead device and be lowered to flow string);
4, be implemented under the safe condition, satisfy the needs of offshore oilfield heavy oil wells heated fluid injection operation, improve the purpose of offshore oilfield heavy oil heat production well oil recovery factor.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a user mode structural representation of the present invention;
Fig. 3 is the structural representation of anti-pollution back pressure valve tool;
Fig. 4 is the user mode structural representation of anti-pollution back pressure valve tool.
The specific embodiment
As shown in Figure 1, 2, the present invention includes: with the suitable body 15 of hot fluid tubing string 24, body 15 is installed on the valve seat 18, offer the cavity 11 that connects vertically on the body 15, body 15 is provided with upper ball base 13 and lower ball base 12, body 15 is provided with the ball valve 14 that is used to control cavity 11 opening and closing, and ball valve 14 is installed between upper ball base 13 and the lower ball base 12, and the cock switch that also is provided with 14 opening and closing of control ball valve on the valve seat 18 extends drive link 17.
When the present invention uses, at first, valve seat 18 is inserted in the thermal recovery well head device, link to each other with sleeve pipe 21, be lowered to anti-pollution back pressure valve tool 10 and bottom heated fluid injection tubing string 23 with holes to heat injection viscous crude target zone, again switch valve 9 of the present invention is connected last root top heat injection tubing string 24 tops, open plate valve in the anti-pollution back pressure valve tool 10 under the lower going-into-well, at last, seat is gone into thermal recovery production tree 20 on valve seat 18, makes thermal recovery well head device and down-hole (pit shaft) be in sealing state and carries out the heated fluid injection operation.
The heated fluid injection end of job, the cock switch that is rotatably provided on the valve seat 18 with spanner extends drive link 17, drives shut off valve cock rotation and closes ball valve 14, closes the pressure that exists in the heated fluid injection tubing string of top.Under the prerequisite that safety is protected, dismounting well head production tree 20, on carry the top heated fluid injection tubing string 24 1 single (about about 10 meters) that inserts in the anti-pollution back pressure valve tool 10 afterwards, plate valves in the round Realization down-hole anti-pollution back pressure valve tool 10 cut out and all trip out and insert anti-pollution back pressure valve tool 10 above heated fluid injection tubing strings 24, also are that subsequent job (as changing-over production wellhead device and be lowered to flow string) provides safety guarantee.Improve the operational security of offshore oilfield heavy oil wells heated fluid injection, realize the effect of offshore oilfield heavy oil wells oil recovery factor.
Claims (2)
1, heat injection tubing string top switch valve gear in a kind of thermal production well mouth, it is characterized in that, comprise: with the suitable body of hot fluid tubing string, body is installed on the valve seat, offer the cavity that connects vertically on the described body, also be provided with the ball valve that is used to control described cavity opening and closing on described body, the cock switch that also is provided with the described ball valve opening and closing of control on the described valve seat extends drive link.
2, device as claimed in claim 1 is characterized in that, described body is provided with upper ball base and lower ball base, and described ball valve is installed between described upper ball base and the lower ball base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100867203A CN101598008A (en) | 2009-06-24 | 2009-06-24 | Heat injection tubing string top switch valve gear in the thermal production well mouth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100867203A CN101598008A (en) | 2009-06-24 | 2009-06-24 | Heat injection tubing string top switch valve gear in the thermal production well mouth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101598008A true CN101598008A (en) | 2009-12-09 |
Family
ID=41419589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100867203A Pending CN101598008A (en) | 2009-06-24 | 2009-06-24 | Heat injection tubing string top switch valve gear in the thermal production well mouth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101598008A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071908A (en) * | 2010-12-16 | 2011-05-25 | 张跃 | Anti-blowout control valve |
| CN104453815A (en) * | 2014-11-19 | 2015-03-25 | 中国海洋石油总公司 | Thermal recovery antipollution pipe column |
| CN105178903A (en) * | 2015-10-21 | 2015-12-23 | 大连瑞亨机械制造有限公司 | Novel high-strength blowout preventer in top driving device |
-
2009
- 2009-06-24 CN CNA2009100867203A patent/CN101598008A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071908A (en) * | 2010-12-16 | 2011-05-25 | 张跃 | Anti-blowout control valve |
| CN102071908B (en) * | 2010-12-16 | 2013-05-08 | 张跃 | Anti-blowout control valve |
| CN104453815A (en) * | 2014-11-19 | 2015-03-25 | 中国海洋石油总公司 | Thermal recovery antipollution pipe column |
| CN105178903A (en) * | 2015-10-21 | 2015-12-23 | 大连瑞亨机械制造有限公司 | Novel high-strength blowout preventer in top driving device |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20091209 |