CN201125704Y - Skate-board type casing head - Google Patents
Skate-board type casing head Download PDFInfo
- Publication number
- CN201125704Y CN201125704Y CNU200720015793XU CN200720015793U CN201125704Y CN 201125704 Y CN201125704 Y CN 201125704Y CN U200720015793X U CNU200720015793X U CN U200720015793XU CN 200720015793 U CN200720015793 U CN 200720015793U CN 201125704 Y CN201125704 Y CN 201125704Y
- Authority
- CN
- China
- Prior art keywords
- casing
- slide plate
- head
- pipe
- casing 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 relates to a casing head used for drilling wells, in particular to a skateboard type casing head ,which is composed of short units connected by the female cap thread at the bottom of the well-head flange, a tray, a support sheath supporting the tray,9(5/8)'' short unit and 9(5/8)'' surface casing .The support sheath and 9(5/8)'' short unit are connected with the body by a cap thread, the body is provided with 5(1/2)'' casing coupling, a skateboard, a mandrel, a seal set, a pressed bolt and a pressed mandrel. The device has a dual function with the casing suspension or smoothly going in the well, and construction can be done without cutting the surface casing, having no security risks.
Description
Technical field:
The utility model relates to the casing head that drilling well is used, especially a kind of slide type casing head.
Background technology:
In the wellbore construction, in the above position of the flange of well head blowout preventer is housed, wellhead flange will be used the casing head suspension sleeve with upper/lower positions, this instrument is being brought into play very important function in the later stage completion practice, at present, Su Lige has revived in the gas field 10 blocks since drilling well, because normal sleeve head that uses and the simple and easy casing head of long celebrating.Cost an arm and a leg, the structure very complicated, it will rely on sealings such as rubber parts, high-pressure injection moulding fat, steel ring when using.Installation process is comparatively loaded down with trivial details, and is easy to generate leakage.The tube head that has in addition also need cut surperficial sleeve pipe, is subjected to the restriction of well head operating condition, is difficult to cut flat surface pipe, not only causes well head not straight and even, also exists simultaneously and cuts bad sleeve pipe risk.Can bring hidden danger to safety in production again.If particularly when well cementation, adopt anti-squeeze method cementing method can cause the drawback of weak effect again.
The utility model content:
The purpose of this utility model is a kind of slide type casing head that provides in order to overcome above-mentioned shortcoming, and this casing head has double action can hang and pass through sleeve pipe in the lower going-into-well, does not exist during use because of the cutting potential safety hazard that surface pipe brought.
The technical solution of the utility model is:
The task of Ti Chuing for achieving the above object, the utility model has adopted the pipe nipple by the interior screwed connection of wellhead flange bottom, and pallet supports the support set of pallet,
Pipe nipple reaches
Surface pipe is formed, described support set with
Linking a body by screw thread between the pipe nipple, in body, be equipped with
Casing coupling, slide plate, push rod, sealing shroud, hold-down bolt.Described slide plate is four and is installed in intrinsic fan-shaped circle sheet, the slide plate inward flange have sawtooth with
The outer arm contact of sleeve pipe, push rod is a metal round rod, and a headband dome head is placed in the circular groove of slide plate, and the other end has screw thread and is contained in the sealing shroud, matches with collet threaded.In the blowout preventer process is installed, the slide type casing head is connected the bottom of wellhead flange during use, can be lowered to sleeve pipe in well head, this moment, the casing head inner slide can not influence passing through of drilling tool.After when hanging the gas-bearing formation sleeve pipe, relying on push rod that slide plate is drawn close, tangle the gas-bearing formation sleeve pipe in well, rely on the tooth of slide plate top to block sleeve pipe in case sleeve pipe rotates.
The utility model compared with prior art has distinguishing feature:
Because in wellhead flange bottom
Above two pipe nipples, this device has been installed, when having solved in the past well gas-bearing formation position setting of casing because of the cutting risk that surface pipe brought, just be lowered to sleeve pipe in the frequentation well again, the step above the casing head hangs reliably in addition, and has the full thread sealing, and it is simple in structure, easy to operate.
Description of drawings:
Fig. 1 is the utility model scheme of installation.
Slide position when Fig. 2 is normal drilling well in the slide type casing head.
Fig. 3 is when hanging the gas-bearing formation sleeve pipe, the slide position of casing head.
Among the figure by 1, wellhead flange, 2, pipe nipple, 3, pallet, 4, carrying bolt, 5, support set, 6,
Casing coupling, 7, slide plate, 8, body, 9, sealing shroud, 10, hold-down bolt, 11, push rod, 12,
Pipe nipple, 13,
Surface pipe, 14,
Sleeve pipe is formed.
The specific embodiment:
The utility model is provided by following examples.
Among Fig. 1, wellhead flange 1 connects together by the flange screw each other with wellhead assembly, and the internal thread below the flange in the endoporus links then two public pipe nipples 2, and this pipe nipple is one
Have support set 5 supporting pallet 3 below the casing nipple, the pallet 3 on its external diameter, the part male thread of these support set 5 tops is connecting body 8, and body 8 second positions are connected to by the box of top
Above the pipe nipple 12,
Pipe nipple 12 pin threads with
The surface pipe box cupling is connected.Be equipped with in (among Fig. 2) body
Below casing coupling with screwed connection
Sleeve pipe, body 8 outsides are that " a ten " font has centre bore, and slide plate 7, push rod 11, sealing shroud 9, collet threaded 10 and push rod 11 (Fig. 1) are housed in the hole.
The sledge displacement of slide type casing head when having showed normal drilling well among Fig. 2, find out among the figure that slide plate 7 is four fan-shaped disks that are installed in the body 8, the slide plate inward flange has sawtooth, four fan-shaped disks are opened and are made the smooth G.I.H of sleeve pipe when setting of casing, when finishing last root sleeve pipe instantly, screwing housing pin 10 advances push rod 11, make the sawtooth of slide plate 7 tops block sleeve pipe, thereby play the suspension sleeve effect, and then carry out cementing operation, because sealing shroud 9 has adopted the full thread sealing means, needn't inject in the use and mould fat and high pressure rubber body, therefore, can not produce leakage phenomenon.
When having showed suspension gas-bearing formation sleeve pipe among Fig. 3, the sledge displacement of casing head.
Figure middle slide plate 7 promotes push rod 11 and by push rod dome head sleeve pipe is blocked by hold-down bolt 10, and then descends the step cementing operation.Push rod 11 is a metal round rod, and one headband dome head is placed in the circular groove of slide plate 7, and the other end has screw thread and is contained in the sealing shroud 9, and cooperates with hold-down bolt 10.
Claims (2)
1, a kind of slide type casing head is the pipe nipple (2) by the following interior screwed connection of wellhead flange (1), pallet (3), the support set (5) of support pallet,
Pipe nipple (12),
Surface pipe (13) is formed, and it is characterized in that: described support set (5) with
Harness cord links and is knotted a body (8) between the pipe nipple (12), is equipped with in body (8)
Casing coupling (6), slide plate (7), push rod (11), sealing shroud (9), hold-down bolt (10).
2, a kind of slide type casing head according to claim 1 is characterized in that: described slide plate (7) is four fan-shaped circle sheets that are installed in the body (8), the slide plate inward flange have sawtooth with
Sleeve pipe (14) outer wall contact, push rod (11) be a metal round rod, and a headband dome head is placed in the circular groove of slide plate (7), and the other end has screw thread and is contained in that sealing shroud (9) is interior to match with hold-down bolt (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720015793XU CN201125704Y (en) | 2007-11-12 | 2007-11-12 | Skate-board type casing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720015793XU CN201125704Y (en) | 2007-11-12 | 2007-11-12 | Skate-board type casing head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201125704Y true CN201125704Y (en) | 2008-10-01 |
Family
ID=39999175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720015793XU Expired - Fee Related CN201125704Y (en) | 2007-11-12 | 2007-11-12 | Skate-board type casing head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201125704Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105781469A (en) * | 2016-03-30 | 2016-07-20 | 天津大港油田石油工程研究院钻采技术开发公司 | Gravity self-sealed blowout rescue device |
-
2007
- 2007-11-12 CN CNU200720015793XU patent/CN201125704Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105781469A (en) * | 2016-03-30 | 2016-07-20 | 天津大港油田石油工程研究院钻采技术开发公司 | Gravity self-sealed blowout rescue device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081001 Termination date: 20091214 |