CN208137898U - A kind of small casing wellhead hookup - Google Patents
A kind of small casing wellhead hookup Download PDFInfo
- Publication number
- CN208137898U CN208137898U CN201820488547.4U CN201820488547U CN208137898U CN 208137898 U CN208137898 U CN 208137898U CN 201820488547 U CN201820488547 U CN 201820488547U CN 208137898 U CN208137898 U CN 208137898U
- Authority
- CN
- China
- Prior art keywords
- small casing
- suspension
- taper
- casing
- well head
- 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 is a kind of small casing wellhead hookup, can be used for small casing producing well suspension small casing, it can also be used to which the secondary well cementation of casing damaged well repairs set construction, small casing is suspended on well head.A kind of small casing wellhead hookup includes well head big four and suspension body, suspension body is equipped with centre bore, taper suspension section outside is equipped with rubber seal, the both ends of suspension body are respectively equipped with casing internal screw thread and small casing external screw thread, metal o-ring is additionally provided with outside taper suspension section, the taper of the taper suspension section male cone (strobilus masculinus) of suspension body is identical as the taper of well head big four inner conical surface, is suspended in well head big four.The present apparatus can be matched with former well head big four, without employing the open fires such as electricity, gas welding, improve operation timeliness, it can be avoided risk of getting angry, it effectively prevents getting angry mass defect caused by cutting welding wellhead assembly and eliminates security risk, the requirement for reaching Essential Safety has ensured oilfield safety production.
Description
Technical field
The utility model belongs to wellhead hookup used in petroleum industry oil well, and especially a kind of small casing well head is outstanding
Hang device can be used for small casing producing well suspension small casing, it can also be used to which the secondary well cementation of casing damaged well repairs set construction, by small casing
It is suspended on well head.
Background technique
Oil field development enters the middle and later periods, by fill the water, recover the oil, the factors such as well stimulation are influenced, production string damages well year by year
Increase, many whole wellbore casing damage wells occurs, oil-water well is forced to stop production to be repaired.To restore casing damaged well production capacity, scene is usually
It is to hang the secondary well cementation of small casing progress in casing damaged well pit shaft to repair set.At present in the work progress of suspension small casing, need to use
Gas cutting removes old casing suspension device, and welds together new and old casing by doughnut-shaped steel plate and hang.Due in well head
Cutting welding, belongs to level-one Industrial ignition, and there are biggish security risks, meanwhile, the wellhead assembly of postwelding is cut due to not in scene
Standard easily leads to well head skew, and the tool of influence goes into the well, is unfavorable for subsequent operation and production.This well head cut after weldering processing
Device is not only lack of standardization, but also welding quality is difficult to ensure, buries security risk.And the oil well to be recovered the oil at present with small casing,
In small casing be to be locked in after well cementation in former casing.In consideration of it, there is an urgent need to develop a kind of standard for production scene
Small casing suspension arrangement.
Summary of the invention
The purpose of this utility model is to provide a kind of small casing wellhead hookup, the secondary well cementation small casing of specification hangs
Extension mode avoids ensureing construction safety and subsequent production peace using risk of getting angry caused by electricity, gas welding cutting and welding procedure
Entirely.
What the purpose of this utility model was realized in：A kind of small casing wellhead hookup includes well head big four and outstanding
Hanging body, suspension body is equipped with centre bore, taper suspension section outside is equipped with rubber seal, and the both ends of suspension body are respectively equipped in casing
Screw thread and small casing external screw thread, taper suspension section outside are additionally provided with metal o-ring, the taper suspension section male cone (strobilus masculinus) of suspension body
Taper is identical as the taper of well head big four inner conical surface, is suspended in well head big four.
After cut waste and old casing at present, welding doughnut-shaped steel plate come compared with hanging small casing, the beneficial effect of the utility model
Fruit is：The present apparatus can be matched with former well head big four, and without employing the open fires such as electricity, gas welding, raising operation timeliness can
Risk of getting angry is avoided, well site Standardization Construction is promoted.In the present apparatus external screw thread of the small casing linkage section of suspension body can directly with
Small casing connection in well, hangs housing in well head big four, is compressed suspension body dieback by jackscrew, multiple-sealed circle envelope
The annular space between tunica pipe and small casing has been lived, circulation canal when cement slurry cementing is established.Utilize well head big four
Casing bypass eliminates welding tee outlet, and the casing internal screw thread in suspension body upper lumen can directly be connect with casing nipple,
To install new well head.It effectively prevents getting angry mass defect caused by cutting welding wellhead assembly and eliminates security risk,
The requirement for reaching Essential Safety has ensured oilfield safety production.Its specific advantage is for example following：
1, the suspension body in the present apparatus directly connect suspension with small casing tubing string in well by small casing external screw thread, without dynamic
Former well head is transformed in fire, convenient and efficient, safe and efficient；
2, well cementation channel is established using former casing, creates loop exit without welding tee pipe, it is time saving and energy saving, not additionally
Increase construction workload.
3, good with well bore concentricity after the suspension of small casing tubing string, it avoids the skew-caused working string of well head and removes and hang
Block the problems such as producing polished rod eccentric wear of detaining and recover the oil partially caused by injustice.
4, present apparatus cost of manufacture is cheap, easy to operate, has good application value.
5, currently, the oil well to be recovered the oil with small casing, small casing therein is locked in former casing after well cementation.
After repairing set by the secondary well cementation of present apparatus suspension small casing tubing string, it may continue to suspension small casing tubing string, be used for subsequent small set
Pipe recovers the oil in production, can also provide for the oil well operation of later small casing producing well conveniently, using effect is significant.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
The utility model is described in detail below in conjunction with attached drawing, not limits the protection scope of the utility model.It is as described below to be only
The preferred embodiment of the utility model, it is non-to limit the protection scope of the utility model, other with the utility model etc.
Effect variation, all should belong to the protection range of the utility model.
Referring to Fig. 1, a kind of small casing wellhead hookup includes well head big four 5 and suspension body 8, during suspension body 8 is equipped with
It is equipped with rubber seal 3 outside heart hole 9, taper suspension section, the both ends of suspension body 8 are respectively equipped with casing internal screw thread 1 and small casing
External screw thread 7, taper suspension section outside are additionally provided with metal o-ring, the taper and well head of the taper suspension section male cone (strobilus masculinus) of suspension body 8
The taper of 5 inner conical surface of big four is identical, is suspended in well head big four 5.After small casing suspension, rubber seal 3 and metal
Sealing ring is adjacent to compacting with the inner conical surface of well head big four 5 under the action of down-hole string quality, to seal up the small set of well head
Annular space between pipe and casing.The centre bore 9 of suspension body 8 is subsequent well cementation to be connected to small casing and new production tree
And production of hydrocarbons establishes channel.
The outer circle of the suspension body 8 is successively taper suspension section, changeover portion and small casing linkage section, changeover portion from top to bottom
Outer diameter be less than the minimum outer diameter of taper suspension section and be greater than small casing and connect the outer diameter of section, the lower end of changeover portion is equipped with chamfering, mistake
Cross section can while guaranteeing that the present apparatus has sufficient intensity, the overcurrent volume of mud or well liquid can be increased.
The metal o-ring is equipped with twice, is respectively metal o-ring 1 and metal o-ring 24, is arranged in rubber
The two sides of sealing ring 3 enter in well head big four 5 when suspension body 8, and metal o-ring 1 and metal o-ring 24 are in addition to playing
Outside sealing function, also it is capable of the small casing tubing string of righting underground well.The Multiple Combination of metal o-ring and rubber seal
Sealing, makes well head bearing capacity and reliability higher, facilitates well cementing operation.
Described sleeve pipe internal screw thread 1 is arranged in the upper lumen of suspension body 8, connect with casing nipple, small casing external screw thread 7
The lower part that small casing linkage section is arranged in is connect with small casing.After under small casing tubing string to design position, small casing external screw thread 7
It is suspended in well head big four 5 for connecting last root small casing, and by small casing tubing string.
After the suspension of small casing tubing string, the uniformly distributed jackscrew 10 in 5 top of well head big four is screwed out, by 8 dieback of suspension body and is pressed
Tightly in well head big four 5, prevent suspension body 8 in well cementing process from altering under pressure.
The casing bypass 1 and casing bypass 2 11 of 5 two sides of well head big four can be established for cementing operation and workover treatment
Exit passageway, it is more more convenient as exit passageway than current welding tee pipe, safe and efficient.
The embodiment described above is only exemplary embodiments, but the present invention is not limited only to these embodiments, this field
Technical staff can make modification without departing from the spirit and inspiration of the present invention.There may be many for aspect disclosed herein
Change, combination and modification, and be within, therefore, protection scope is not limited only to explanation above.
Claims (4)
1. a kind of small casing wellhead hookup, including well head big four and suspension body, suspension body is equipped with centre bore, taper is hung
Section outside is equipped with rubber seal, characterized in that the both ends of suspension body are respectively equipped with casing internal screw thread and small casing external screw thread, cone
Metal o-ring, the taper and well head big four inner conical surface of the taper suspension section male cone (strobilus masculinus) of suspension body are additionally provided with outside shape suspension section
Taper it is identical, be suspended in well head big four.
2. a kind of small casing wellhead hookup as described in claim 1, characterized in that the outer circle of the suspension body from upper and
Under be successively taper suspension section, changeover portion and small casing linkage section, the outer diameter of changeover portion is less than the minimum outer diameter of taper suspension section
And it is greater than the outer diameter that small casing connects section, the lower end of changeover portion is equipped with chamfering.
3. a kind of small casing wellhead hookup as described in claim 1, characterized in that the metal o-ring is equipped with two
Road is metal o-ring one and metal o-ring two respectively, and the two sides of rubber seal are arranged in.
4. a kind of small casing wellhead hookup as claimed in claim 2, characterized in that the setting of described sleeve pipe internal screw thread is outstanding
It is connect in the upper lumen of hanging body, with casing nipple, lower part and the small casing of small casing linkage section is arranged in small casing external screw thread
Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820488547.4U CN208137898U (en) | 2018-04-09 | 2018-04-09 | A kind of small casing wellhead hookup |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820488547.4U CN208137898U (en) | 2018-04-09 | 2018-04-09 | A kind of small casing wellhead hookup |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208137898U true CN208137898U (en) | 2018-11-23 |
Family
ID=64291227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820488547.4U Expired - Fee Related CN208137898U (en) | 2018-04-09 | 2018-04-09 | A kind of small casing wellhead hookup |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208137898U (en) |
-
2018
- 2018-04-09 CN CN201820488547.4U patent/CN208137898U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181123 Termination date: 20210409 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |