CN203547561U - Completion string for oil and gas well - Google Patents
Completion string for oil and gas well Download PDFInfo
- Publication number
- CN203547561U CN203547561U CN201320671757.4U CN201320671757U CN203547561U CN 203547561 U CN203547561 U CN 203547561U CN 201320671757 U CN201320671757 U CN 201320671757U CN 203547561 U CN203547561 U CN 203547561U
- Authority
- CN
- China
- Prior art keywords
- completion
- oil
- completion string
- gas well
- safety valve
- 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
Links
- 239000007788 liquid Substances 0.000 claims description 12
- 238000007789 sealing Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 239000004215 Carbon black (E152) Substances 0.000 abstract description 2
- 238000011109 contamination Methods 0.000 abstract description 2
- 229930195733 hydrocarbon Natural products 0.000 abstract description 2
- 150000002430 hydrocarbons Chemical class 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 5
- 241000254175 Anthonomus grandis Species 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
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Abstract
The utility model discloses a completion string for an oil and gas well, and belongs to the technical field of completion strings of oil production engineering. The completion string for the oil and gas well comprises an inner oil pipe, a safety valve and a hydraulic control pipeline, wherein an adapter connector is connected with the upper portion of the safety valve in a threaded mode, a stair-shaped inner shoulder and connecting threads are arranged on the adapter connector, and are connected with the inner oil pipe and an outer pipe respectively, a through hole is formed in the inner shoulder of the adapter connector, the hydraulic control pipeline is arranged in an annular space between the inner oil pipe and the outer pipe, penetrates through the through hole formed in the inner shoulder of the adapter connector, and is sealed by a sealing part, and the inner oil pipe is fixedly connected with the hydraulic control pipeline through a snap ring. According to the completion string for the oil and gas well, the completion string with the downhole safety valve is obtained under the condition of snubbing operation, contamination of a hydrocarbon reservoir in the well completion process is reduced, and the reservoir is effectively protected; the technological cost is low, sealing of the completion string is reliable, the well completion technology is simple, snubbing operation can be accomplished under the condition that the internal structure and functions of an original completion string are not changed, and the range of application is wide.
Description
Technical field
The utility model belongs to petroleum production engineering completion tubular column technical field, relates to a kind of oil gas well completion tubing string.
Background technology
During oil gas well completion operation, for balance down-hole pressure, prevent gas blowout accident, need to adopt well killing fluid kill-job, because well killing fluid is chemical agent, easily pollute reservoir, affect Oil/gas Well output.Development late stage particularly, the well that strata pressure is lower, well killing fluid is easily missed into stratum, more easily reservoir is polluted.In order to reduce the pollution to reservoir, such well need to adopt snubbing serving mode conventionally,, in the situation that not pouring into well killing fluid, utilizes the well head snubbing serving device lower tubular column that rises by force with pressure to carry out completion practice.
Gas storage well, high sour gas well, offshore oil gas well are because safe coefficient requirement is high, and down-hole string is all provided with storm valve in the position that approaches well head.On storm valve, there is a 1/4 ＂ tubular metal liquid controling pipe line to be close to oil-pipe external wall and extend to well head, and receive the fluid control pressure (switch order) on ground.When serious accident occurs on ground, as out of control in well head, down-hole is closing well rapidly, realizes being perfectly safe of Oil/gas Well controlled.
Current snubbing serving device can only seal regular circular tubing string, but due to being installed, the tubing string of storm valve also there is a liquid controling pipe line outward, not kill-job device cannot be realized this erose pipe external seal, thereby causes ripe snubbing serving technology cannot be applied in the completion practice of this class band downhole safety valve pit.And existing completion tubular column and well-completing process all cannot address this problem, can only adopt the mode of kill-job to carry out completion practice, be unfavorable for Completion Operations mesolow reservoir protection.
Summary of the invention
The purpose of this utility model is the technological deficiency of using under snubbing serving device with the completion tubular column poor sealing performance of storm valve in order to overcome, and a kind of wide, simple completion tubular column that adapts to is provided.
The utility model is realized by the following technical programs:
The utility model is comprised of inner oil tube, safety valve, liquid controling pipe line, on safety valve top, be threaded connection variable buckle joint, variable buckle joint is provided with stepped interior shoulder and connecting thread, is connected respectively with inner oil tube with outer tube, in variable buckle joint, on shoulder, has through hole; The annular space of liquid controling pipe line between inner oil tube and outer tube, and pass through the through hole on shoulder in variable buckle joint, by seal, sealed.
Described inner oil tube and liquid controling pipe line are fixed by snap ring.
Beneficial functional of the present utility model is:
1, the utility model has been realized under snubbing serving with the completion tubular column of storm valve, has reduced hydrocarbon contamination in Completion Operations, has effectively protected reservoir.
2, the utility model cost is low, tubing string sealing is reliable, well-completing process is simple, does not change former tubing string internal construction and function and can realize snubbing serving, wide accommodation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is done to concrete description:
From accompanying drawing 1, the utility model is comprised of inner oil tube 2, safety valve 8, liquid controling pipe line 3, on safety valve 8 tops, be threaded connection variable buckle joint 4, variable buckle joint 4 is provided with stepped interior shoulder and connecting thread, be connected with outer tube 1 with inner oil tube 2 respectively, on the interior shoulder of variable buckle joint 4, have through hole 5; The annular space of liquid controling pipe line 3 between inner oil tube 2 and outer tube 1, and pass through the through hole 5 on the interior shoulder of variable buckle joint 4, by seal 6, sealed.
Described inner oil tube 2 is fixed by snap ring with liquid controling pipe line 3.
Well head is used snubbing serving device, lower completion tubular column is during to storm valve precalculated position, the mobile pipe nipple 7 on safety valve 8 tops is threaded with variable buckle joint 4, the through hole 5 that liquid controling pipe line 3 passes through on the interior shoulder of variable buckle joint 4 is connected with safety valve 8, inner oil tube 2, outer tube 1 are threaded with variable buckle joint 4 respectively, by not kill-job device, block outer tube 1, G.I.H, alternately connect successively again inner oil tube 2 and outer tube 1 to well head, by the boll-weevil hanger inner oil tube 2 that is threaded, and be seated in well head four-way, realize completion tubular column under snubbing serving.
Claims (2)
1. an oil gas well completion tubing string, by inner oil tube (2), safety valve (8) and liquid controling pipe line (3), formed, it is characterized in that: on safety valve (8) top, be threaded connection variable buckle joint (4), variable buckle joint (4) is provided with stepped interior shoulder and connecting thread, be connected with outer tube (1) with inner oil tube (2) respectively, in variable buckle joint (4), on shoulder, have through hole (5); Liquid controling pipe line (3) is positioned at the annular space between inner oil tube (2) and outer tube (1), and passes through the through hole (5) on the interior shoulder of variable buckle joint (4), by seal (6), is sealed.
2. oil gas well completion tubing string according to claim 1, is characterized in that: described inner oil tube (2) is fixed by snap ring with liquid controling pipe line (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320671757.4U CN203547561U (en) | 2013-10-29 | 2013-10-29 | Completion string for oil and gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320671757.4U CN203547561U (en) | 2013-10-29 | 2013-10-29 | Completion string for oil and gas well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203547561U true CN203547561U (en) | 2014-04-16 |
Family
ID=50465690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320671757.4U Expired - Fee Related CN203547561U (en) | 2013-10-29 | 2013-10-29 | Completion string for oil and gas well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203547561U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104295243A (en) * | 2013-10-29 | 2015-01-21 | 中国石油化工股份有限公司 | Completion pipe column and completion technology for oil-gas well |
-
2013
- 2013-10-29 CN CN201320671757.4U patent/CN203547561U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104295243A (en) * | 2013-10-29 | 2015-01-21 | 中国石油化工股份有限公司 | Completion pipe column and completion technology for oil-gas well |
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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 |
Granted publication date: 20140416 Termination date: 20171029 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |