CN201095968Y - Slips type casing tube buckle connected simple casing head - Google Patents
Slips type casing tube buckle connected simple casing head Download PDFInfo
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- CN201095968Y CN201095968Y CNU2007200328736U CN200720032873U CN201095968Y CN 201095968 Y CN201095968 Y CN 201095968Y CN U2007200328736 U CNU2007200328736 U CN U2007200328736U CN 200720032873 U CN200720032873 U CN 200720032873U CN 201095968 Y CN201095968 Y CN 201095968Y
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- taper
- slip
- casing
- slips
- layer sleeve
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Abstract
The utility model provides a slip-type simple casing head linked by a bushing buckle, which mainly consists of a cone slip recess, a cone slip, a supporting cylinder, a support ring, a supporting sleeve and a bottom flange; wherein, the cone slip recess is arranged between an outer layer bushing and a hohlraum of an inner layer bushing as well as is positioned on the top surface of the outer layer bushing, and the cone slip recess is internally provided with the cone slip; the supporting cylinder is placed on the cone slip recess; an inner hole of the bottom flange of a wellhead is connected with casing threads, and a puller bolt, the support ring and the supporting sleeve are installed between the bottom flange and the supporting cylinder. The slip-type simple casing head linked by a bushing buckle has simple construction, convenient installation and low cost, and is especially applicable to the well with oil or gas having higher pressure.
Description
Technical field
The utility model relates to a kind of oil gas casing post wellhead assembly that is used for oil exploration and exploitation.
Background technology
In the prior art, domestic each oil, gas field are except that deep-well and high-pressure oil-gas well at present, and part oil, gas well all use doughnut-shaped steel plate---two public pipe nipple casing heads.Because the installation of doughnut-shaped steel plate can not guarantee the axiality of production casing and outer layer sleeve, the verticality of doughnut-shaped steel plate and outer layer sleeve axis and the pretension of production casing.Because the doughnut-shaped steel plate installation work adopts gas cutting and electric welding to carry out, well head can't carry out the whole heat treatment of eliminating welding stress again.For the above specialized barrel grade of steel of J-55, API standard (American Petroleum Institute (API)) regulation is not allow to carry out electric welding.Integrating doughnut-shaped steel plate---the important disadvantages of two public pipe nipple casing heads has following 3 points: 1, production casing is just hanging not on doughnut-shaped steel plate, and unbalance stress causes additional bending stress easily on the body; 2, the well head sleeve pipe is welded the API standard of having violated, welding stress can't be eliminated again, and stress is concentrated serious; More than 2 subsidiary stresses that produced, the sulfur resistance to high-pressure gas well has considerable influence especially, because easily cause the generation of hydrogen sulfide stress fracture (SSO) major accident under high-stress state.3, the easy casing threads of revealing of well head has three places, thereby can not guarantee the reliability of the sealing of high-pressure gas well.The production of domestic present conventional cannula head is because the rubber parts sealing performance, and the particularly anti-natural gas life-span is shorter, simultaneously also since on non-finished surface the metallic seal technology do not reach a standard as yet, therefore can't be suitable for and stop production.All hydraulic oil, the gas wells that need use the conventional cannula head are a complete set of import basically.In the prior art, more with u s company's production conventional cannula in the world.There is VE TCO GRAY company in more famous company, BAOJI BPMMP petroleum machinery manufacturing company etc.The casing head that VE TCO Technology A. S. produces has been represented the contemporary world level.China's import use in a large number in the high pressure high gas rate well.Its main feature is: 1, use triple seal structure, i.e. rubber seal+metallic seal+teflon seal.Inject high pressure sealing fat between the rubber seal, so this cover system seals the bushing outer surface reliability height of non-machined surface; 2, adopt slips to hang, guaranteed that suspension sleeve hangs between two parties and by predetermined pull; 3, can solve sleeve pipe and be hampered under the situation, can't lower going-into-well at the bottom of the time, the suspension problem of well head sleeve pipe.The conventional cannula head that VE TCO Technology A. S. produces though technology is advanced, costs an arm and a leg, and it is impossible that China introduces fully.Site operation proves simultaneously, and structure is too complicated, brings a lot of troubles for on-the-spot the installation, has incured loss through delay construction period.
Summary of the invention
The purpose of this utility model provides a kind of slip-type casing tube button and connects simple and easy casing head, to replace or additional traditional oil, gas well casing head, it can guarantee to recover the oil or the sealing of gas production production casing, alignment and installation geometric accuracy thereof, reach stressed and evenly construct simply, easy for installation, cost reduces, and the oil, the gas well that are specially adapted to elevated pressures use.
The technical scheme that realizes the utility model purpose is, a kind of slip-type casing tube button connects simple and easy casing head, mainly form by taper slip spider, taper slips, support tube, support ring, puller bolt, support set and end flange, between outer layer sleeve and the inner layer sleeve annular space and be seated at the outer layer sleeve end face and be provided with the taper slip spider, the taper slips is housed in the taper slip spider; Lay support tube above the taper slip spider; The endoporus of flange links to each other with casing threads at the bottom of the well head, and puller bolt, support ring and support set are housed between end flange and support tube, is threaded between puller bolt and the support ring, and support set is made up of two halves, links to each other with the support ring cylinder.The taper slip spider is made up of discrete two half blocks, reach in the same moved further of outer inside pipe casing by synchronous pin between the two, the external diameter of taper slip spider and outer layer sleeve internal diameter adopt and are slidingly matched, the taper slips is identical with the slip spider internal diameter by 4 external diameters, the slips that internal diameter is identical with the inner layer sleeve external diameter is formed, and on the taper slips, has the twice groove on each sheet again, channel bottom thickness is the 2-4 millimeter, and puller bolt and end flange contact facings are spherical.
The utlity model has following advantage:
1, the utility model is fit to the actual conditions, the particularly exploitation in low-permeability oil gas field of China's part oil gas field, is installed into muzzle tube head cost costliness, and this device a kind of cost of can yet be regarded as is low, the wellhead assembly that reliability is high.
2, the utility model casing head can guarantee how much to moderate, the accuracy that pretension loads.
3, because this device does not need to weld in installation process, there is not the welding stress that causes thus yet, thereby avoided H under the condition of high voltage
2The hydrogen embrittlement fracture that S may cause.
4, the emergency processing of leakage situation appears in the two halves structure process easy to use of support set.
5, this device site operation is simple, and is easy for installation.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing
As shown in Figure 1, the taper slip spider 8 that discrete two halves are formed is loaded in the annular space between outer layer sleeve and the inner layer sleeve, be lowered to synchronously in the annular space by synchronous pin 6 between the taper slip spider 8, taper slips 7 is formed by 4, synchronous pin is also arranged to guarantee to tighten synchronously inner layer sleeve between mutually.Also have two deep trouths on the every taper slips 7, the connection thickness between making mutually is below 4 millimeters, and therefore, the whole circumference direction is equivalent to have 12 slips; Trace adjustment can be done each other, therefore sleeve pipe can be evenly tightened.
Outer layer sleeve to oil, gas well mouth uses custom-designed cutting or gas cutting tool, makes the processing plane of outer layer sleeve end face formation perpendicular to axis.In the annular space of outer layer sleeve and inner layer sleeve (can be that protective casing also can be a production casing), be lowered to the taper slip spider of forming by two halves 8, taper slip spider 8 inner surfaces have the slips conical surface of 1: 3 tapering, and there is the shoulder seat on the end top on the top plan of outer layer sleeve.Sealing has the oil well cement special in outer layer sleeve and the inner layer sleeve annular space, and as required, the cement that has returns to producing zone top 200-300 rice; The cement that has returns high to well head.
After adding prestretching load by designing requirement to inner layer sleeve, be lowered to 4 taper slips 7, taper slips 7 chucking inner layer sleeves also are suspended on the taper slip spider 8, shed landing joint (1 sleeve pipe in the top on the bunch tube) after discharging prestretching load, two public pipe nipples are installed, lay support tube 5 then, support tube 5 is regulated height according to two public pipe nipples, support ring 2 and support set 4 are laid in support tube 5 tops, tapped support ring 2 is topmost, support set 4 is connected with support ring 2 cylinder steps for the two halves structure, next the inner sleeve button with end flange 1 is connected with the overcoat pipe thread of two public pipe nipples, torque demand by design tightens screw thread, at last puller bolt 3 is held out against on end flange 1 lower surface, has just finished whole installation work of the present utility model.
Be provided with taper slip spider 8 in the utility model outer layer sleeve and the inner layer sleeve annular space, taper slips 7 is housed in it, the concentricity that has guaranteed the internal and external casing post reaches evenly stressed, can improve the suspension ability from the taper slips 7 of dynamic deformation during chucking, cover pipe thread on the end flange 1 has guaranteed its sealing, the puller bolt 3 that be equipped with flange 1 bottom in the end, support ring 2, support set 4 have guaranteed that promptly the axial load on the end flange 1 can evenly be delivered on the outer layer sleeve, but regulating shaft is to distance again, the kit construction is simple, easy for installation.
The suspension force of this device depends on diameter, wall thickness and the grade of steel of outer layer sleeve, and the two halves structure of support set 4 is convenient to dismounting, its objective is that device in use, flange 1 screw thread place in the end is as leaking, can take out support set 4, vacating space is convenient to install device for plugging, carries out leak stopping work.
Claims (5)
1, a kind of slip-type casing tube button connects simple and easy casing head, mainly form by taper slip spider (8), taper slips (7), support tube (5), support ring (2), support set (4) and end flange (1), it is characterized in that between outer layer sleeve and inner layer sleeve annular space and be seated at being provided with taper slip spider (8) on the outer layer sleeve end face, taper slips (7) is housed in taper slip spider (8); Lay support tube (5) above the taper slip spider (8); The endoporus of flange at the bottom of the well head (1) links to each other with casing threads, and puller bolt (3), support ring (2) and support set (4) are housed between end flange (1) and support tube (5).
2, a kind of slip-type casing tube button as claimed in claim 1 connects simple and easy casing head, it is characterized in that taper slip spider (8) is made up of discrete two half blocks, reach in the same moved further of outer inside pipe casing by selling (6) synchronously between the two, the external diameter of taper slip spider (1) and outer layer sleeve internal diameter adopt and are slidingly matched.
3, a kind of slip-type casing tube button as claimed in claim 1 connects simple and easy casing head, it is characterized in that taper slips (7) is identical with taper slip spider (8) internal diameter by 4 external diameters, the slips that internal diameter is identical with the inner layer sleeve external diameter is formed, on the taper slips, have the twice groove on each sheet again, channel bottom thickness is the 2-4 millimeter.
4, a kind of slip-type casing tube button as claimed in claim 1 connects simple and easy casing head, it is characterized in that puller bolt (3) and end flange (1) contact surface are sphere, and puller bolt (3) is threaded with support ring (2).
5, a kind of slip-type casing tube button as claimed in claim 1 connects simple and easy casing head, it is characterized in that support set (4) is made up of two halves, links to each other with support ring (2) cylinder step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200328736U CN201095968Y (en) | 2007-09-28 | 2007-09-28 | Slips type casing tube buckle connected simple casing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200328736U CN201095968Y (en) | 2007-09-28 | 2007-09-28 | Slips type casing tube buckle connected simple casing head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201095968Y true CN201095968Y (en) | 2008-08-06 |
Family
ID=39923019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200328736U Expired - Fee Related CN201095968Y (en) | 2007-09-28 | 2007-09-28 | Slips type casing tube buckle connected simple casing head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201095968Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109372461A (en) * | 2018-11-27 | 2019-02-22 | 中国石油集团川庆钻探工程有限公司 | Method for resetting wellhead device out of control of blowout |
| CN110761730A (en) * | 2018-07-27 | 2020-02-07 | 谢建勇 | Cable hanging sealing wellhead device for throwing and fishing cable type submersible screw pump cable |
-
2007
- 2007-09-28 CN CNU2007200328736U patent/CN201095968Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761730A (en) * | 2018-07-27 | 2020-02-07 | 谢建勇 | Cable hanging sealing wellhead device for throwing and fishing cable type submersible screw pump cable |
| CN109372461A (en) * | 2018-11-27 | 2019-02-22 | 中国石油集团川庆钻探工程有限公司 | Method for resetting wellhead device out of control of blowout |
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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: 20080806 Termination date: 20140928 |
|
| EXPY | Termination of patent right or utility model |