CN2283723Y - Wellhead cover - Google Patents
Wellhead cover Download PDFInfo
- Publication number
- CN2283723Y CN2283723Y CN 96245618 CN96245618U CN2283723Y CN 2283723 Y CN2283723 Y CN 2283723Y CN 96245618 CN96245618 CN 96245618 CN 96245618 U CN96245618 U CN 96245618U CN 2283723 Y CN2283723 Y CN 2283723Y
- Authority
- CN
- China
- Prior art keywords
- wellhead
- baffle plate
- utility
- cover plate
- model
- 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
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- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The utility model discloses a wellhead cover for the well completion of a petroleum drilling, which is composed of a body and an I-shaped cover plate with a center hole. The interior of the body is provided with a step type circular slot, and an eccentric through hole is arranged in the bottom of the circular slot. A baffle plate for blocking off the bottom edge of the cover plate is fixedly arranged in the body. The wellhead cap which adopts the structure has a good theftprotection function, safely protects a wellhead, prevents wellhead from falling objects, stops to repair a well because of the falling objects, and reduces drilling cost; in addition, the utility model has the advantages of convenient operation, simple processing technology, less material consumption, and low cost.
Description
The utility model relates to a kind of oil drilling completion wellhead assembly, belongs to the wellhead cap instrument.
At present, in oil drilling, after the setting of casing well cementation completion, need to add a wellhead cap to sleeve pipe, prevent that well head is exposed before subsequent job, cause the well head junk and well workover at well head; Common wellhead cap be with the casing coupling thread connection after an overhanging stock, utilize general tool to be very easy to this wellhead cap is stolen, and be unfavorable for the derrick carrying.
The purpose of this utility model is to provide a kind of wellhead cap that does not use special tool it can not be stolen at above-mentioned the deficiencies in the prior art, and is beneficial to the later stage operation.
The technical solution of the utility model is achieved in that body exterior and casing coupling have staged circular groove and intrinsic baffle plate with thread connection, inside, body endoporus bottom has small cylindrical tank and the through hole eccentric with it, place the lower edge of intrinsic " worker " female cap plate to be placed under the baffle plate, the upper edge embeds in the casing coupling.
Above-mentioned wellhead cap, baffle plate and body can be made of one the formula structure.
The utility model compared with prior art has following advantage: owing to adopt cover plate to cover body and the interior structure of embedding sleeve pipe, make not the special tool that uses that matches with the circular groove of body and eccentric circular hole this wellhead cap can not be discharged, therefore, played good anti-theft effect, protected well head safely and reliably, prevented the well head junk, stopped because of the trouble of lost tool in hole well workover, reduce drilling cost, and made things convenient for the later stage operation; In addition, the utility model is easy to use, and processing technology is simple, and materials are few, and cost is low.
Fig. 1 is the utility model and casing coupling assembling longitudinal plan;
Fig. 2 is the A-A cross section cut-away view of Fig. 1.
The utility model is described in further detail below in conjunction with accompanying drawing: body 4 outside and casing coupling 1 threaded engagement, be bonded with baffle plate 6 in the annular groove that on internal step ladder type circular groove, has, small cylindrical tank has the through hole eccentric with it 3 in 2 bottoms, 6 times retainings of baffle plate have the end of " worker " female cap plate 7 that " worker " font has centre bore along 8, and cover plate upper edge 5 embeds in the casing couplings 1.
During actual the use, after being seated in " worker " female cap plate 7 off-centre in the body 4, cooperate with the small cylindrical tank 2 and the eccentric through-hole 3 of body 4 with the centre bore of special spanner by cover plate 7, the rotation spanner drives body 4 and cover plate 7 screws in the screw thread of casing coupling 5, because cover plate 7 is concentric with well head after entering in the casing coupling 1, baffle plate 6 blocks the lower edge 8 of cover plate 7, unloads special spanner and gets final product.
Claims (2)
1. wellhead cap, it is characterized in that: body (4) is outside to have staged circular groove and intrinsic baffle plate (6) with casing coupling (1) with thread connection, inside, body (4) endoporus bottom has small cylindrical tank (2) and the through hole (3) eccentric with it, place the lower edge (8) of the cover plate that has central through hole (7) in the body (4) to be placed under the baffle plate (6), its upper edge (9) embed in the casing coupling (1).
2. wellhead cap according to claim 1 is characterized in that: baffle plate (6) can be made of one the formula structure with body (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96245618 CN2283723Y (en) | 1996-11-04 | 1996-11-04 | Wellhead cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96245618 CN2283723Y (en) | 1996-11-04 | 1996-11-04 | Wellhead cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2283723Y true CN2283723Y (en) | 1998-06-10 |
Family
ID=33918598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96245618 Expired - Fee Related CN2283723Y (en) | 1996-11-04 | 1996-11-04 | Wellhead cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2283723Y (en) |
-
1996
- 1996-11-04 CN CN 96245618 patent/CN2283723Y/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 | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |