CN204457570U - Flange joint does not tear blowout preventer well cementing casing pipe head open - Google Patents
Flange joint does not tear blowout preventer well cementing casing pipe head open Download PDFInfo
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- CN204457570U CN204457570U CN201520139132.2U CN201520139132U CN204457570U CN 204457570 U CN204457570 U CN 204457570U CN 201520139132 U CN201520139132 U CN 201520139132U CN 204457570 U CN204457570 U CN 204457570U
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Abstract
A kind of Flange joint does not tear blowout preventer well cementing casing pipe head open.Mainly solve on existing casing head housing and do not lead to extraneous outlet, the problem of uncontrollable well head pressure.It is characterized in that: main body (1) top is flange, flange periphery axially has 4 with upper bolt hole, there is metal gasket ring sealed groove flange upper surface, flange circumference wall is provided with more than 3 top wire holes, top wire hole is built-in with jackscrew (4), main body (1) upper step hole is built-in with setting head (2), setting head (2) lower end is connected with casing short joint (3), jackscrew (4) inner inclined-plane is placed on above setting head (2), the setting head (2) of jackscrew (4) inner side is fixed with block (5), main body (1) middle wall is circumferentially with 2 with last fluid through-hole (6), fluid through-hole (6) is connected with safety-valve and emptying assembly.This Flange joint does not tear blowout preventer well cementing casing pipe head open can effective control well mouth pressure, prevents the generation that well head pressure is out of control.
Description
Technical field
The utility model relates to the casing head that oil drilling field uses, and especially Flange joint does not tear blowout preventer well cementing casing pipe head open.
Background technology
In oil drilling field, after the well cementation of installation surface pipe terminates, casing head need be arranged on the box cupling of surface pipe.Common existing single-stage base sealing type simple casing joint, primarily of housing, casing hanger, latch composition.Its housing does not lead to extraneous outlet, after well cementation terminates, when there is the situations such as pressure anomaly in annular space, directly the liquid in annular space cannot be discharged, or carry out back-pressure well operations, there is the risk that well head is out of control.
Summary of the invention
Extraneous outlet is not led to, the problem of uncontrollable well head pressure in order to solve on existing casing head housing.The utility model provides a kind of Flange joint not tear blowout preventer well cementing casing pipe head open.This Flange joint does not tear blowout preventer well cementing casing pipe head open can effective control well mouth pressure, prevents the generation that well head pressure is out of control.
The technical solution of the utility model is: this Flange joint is not torn blowout preventer well cementing casing pipe head open and comprised main body, setting head and casing short joint.Body top is flange, flange periphery axially has 4 with upper bolt hole, there is metal gasket ring sealed groove flange upper surface, flange circumference wall is provided with more than 3 top wire holes, top wire hole is built-in with jackscrew, body top stepped hole is built-in with setting head, setting head lower end is connected with casing short joint, the inner inclined-plane of jackscrew is placed on above setting head, the setting head of the inner side of jackscrew is fixed with block, main body middle wall was circumferentially with 2 with last fluid through-hole, fluid through-hole is connected with safety-valve and emptying assembly.
Sealing ring is had in the setting head contact surface groove coordinated with main body stepped hole in such scheme; Sealing ring is had in jackscrew external annular groove; Emptying assembly comprises oil pipe short circuit, the oily ninth of the ten Heavenly Stems, valve and sebific duct, and oil pipe short circuit one end is connected with fluid through-hole, and the oil pipe short circuit other end is connected with oil the ninth of the ten Heavenly Stems, and the oil other end in the ninth of the ten Heavenly Stems is connected with valve, and the valve other end is connected with sebific duct.
The utility model has following beneficial effect: this Flange joint does not tear blowout preventer well cementing casing pipe head open owing to adopting body top to be flange, flange periphery axially has 4 with upper bolt hole, there is metal gasket ring sealed groove flange upper surface, flange circumference wall is provided with more than 3 top wire holes, top wire hole is built-in with jackscrew, body top stepped hole is built-in with setting head, setting head lower end is connected with casing short joint, the inner inclined-plane of jackscrew is placed on above setting head, the setting head of the inner side of jackscrew is fixed with block, main body middle wall was circumferentially with 2 with last fluid through-hole, fluid through-hole is connected with the structure of safety-valve and emptying assembly.Utilize valve and emptying assembly that fluid through-hole connects, can effective control well mouth pressure, prevent the generation that well head pressure is out of control.Thus this Flange joint do not tear blowout preventer well cementing casing pipe head open can effective control well mouth pressure, prevent the generation that well head pressure is out of control.
Accompanying drawing explanation
Accompanying drawing 1 is the utility model structural representation.
1-main body in figure, the setting head of 2-, 3-casing short joint, 4-jackscrew, 5-block, 6-fluid through-hole, 7-oil pipe short circuit, 8-oil the ninth of the ten Heavenly Stems, 9-valve, 10-sebific duct.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Shown in accompanying drawing, this Flange joint is not torn blowout preventer well cementing casing pipe head open and is comprised main body 1, setting 2 and casing short joint 3.Main body 1 is T-shaped tubulose, sleeve external thread is arranged at main body 1 bottom, be connected with surface pipe box cupling by external screw thread, and sealing load, main body 1 top is flange, flange periphery axially has 4 with upper bolt hole, by the rising Flange joint on stud and its top, there is metal gasket ring sealed groove flange upper surface, flange circumference wall is provided with more than 3 top wire holes, top wire hole is built-in with jackscrew 4, sealing ring is had in jackscrew 4 external annular groove, its effect of jackscrew 4 pushes down setting 2, prevent the pressure in setting 2 bottom annular spaces from pushing setting 2 open, and can when dismantling landing and connecing, by stopping the rotation that the block 5 be welded on setting 2 stops setting 2, prevent the screw thread shackle of setting 2 lower tube strings.Setting 2 is inverted T-shaped tubulose, setting 2 two ends all process sleeve pipe internal thread, the sleeve pipe that top and landing connect is connected, bottom is connected with casing short joint 3, casing short joint 3 bottom is connected with production string, setting 2 inclined-planes weld 1 block 5, and block 5 coordinates with jackscrew 4 setting 2 can be stoped to rotate.Main body 1 upper step hole is built-in with setting 2, can by the weight transmitting on setting head on body.Sealing ring is had in setting the 2 contact surface grooves coordinated with main body 1 stepped hole, make to realize between setting 2 and body 1 sealing, setting 2 lower ends are connected with casing short joint 3, the inner inclined-plane of jackscrew 4 be placed in setting 2 above on, setting 2 of the inner side of jackscrew 4 is fixed with block 5, main body 1 middle wall is circumferentially with 4 fluid through-holes 6, fluid through-hole 6 is connected with safety-valve and emptying assembly, fluid through-hole is welded with tube connector, wherein 1 tube connector is connected with safety-valve, safety-valve one end is connected with the fluid through-hole 6 in main body 1, the other end is by screw thread and inspection annular pressure, controlled bleed off pressure or cement squeeze work equipment be connected, when safety-valve is used for later stage operation when borehole pressure occurs abnormal, as inspection annular pressure, controlledly to bleed off pressure or the passage of cement squeeze work, be connected with relevant device by screw thread, all the other tube connectors are connected with emptying assembly, as the fluid passage in drilling well, well cementing process, when pressure anomaly by selecting closedown or current limliting to carry out pressure control operation, after well cementation terminates, emptying assembly is replaced to plug, seal fluid through-hole 6, close annular space in well.Emptying assembly comprises oil pipe short circuit 7, the oily ninth of the ten Heavenly Stems 8, valve 9 and sebific duct 10, and oil pipe short circuit 7 one end is connected with fluid through-hole 6, and oil pipe short circuit 7 other end is connected with oil the ninth of the ten Heavenly Stems 8, and the oil other end in the ninth of the ten Heavenly Stems 8 is connected with valve 9, and valve 9 other end is connected with sebific duct 10.In drilling well and well cementing process, assembly will be bled off pressure and be connected with tube connector, open or close by what control valve 9 in emptying assembly the break-make controlling casing head internal liquid, thus the release of control well mouth pressure or close, realize pressure control operation.
Onsite application flow process is as follows:
After installation surface pipe well shaft fixing technology terminates, this Flange joint is not torn open blowout preventer well cementing casing pipe head and be arranged on the box cupling of surface pipe, top installs and raises flange and supporting well-control equipment, the qualified rear installation emptying assembly of pressure testing and valve.
During drillng operation, if select at casing head place as fluid passage, then open emptying assembly valve 9 and carry out drillng operation.When pressure anomaly situation appears in well head, quick closedown emptying assembly valve 9, enables well-control equipment and carries out getting rid of the danger operation.When confirming without dangerous situation, emptying assembly valve 9 can be opened and continue normal drilling operability.
After drillng operation, drifting, cycle operation terminate, confirmation can setting of casing time, check and open emptying assembly valve 9, entering production string down successively.The casing short joint 3 of setting 2 is connected with the box cupling of last root production string, and landing connects and is connected with setting 2, is connect transfer pipe string by landing, make setting 2 on the body 1 setting.Start well cementing operation after setting confirmation, after the end of job, be torqued into 4 jackscrews 4 on main body 1 circumference of flange, pressed seat end socket 2, reversion dismounting landing connects, and lays down emptying assembly, connects plug.
Confirm that well cementing operation terminates, when there is no other exception, remove this Flange joint and do not tear blowout preventer well cementing casing pipe head open, wear well head cap, whole end of job.
This Flange joint does not tear blowout preventer well cementing casing pipe head open by connecting in main body 1 oil pipe exit the break-make that emptying assembly controls liquid inside and outside casing head in drilling well and well cementing process, thus when pressure anomaly by selecting closedown or current limliting to carry out pressure control operation.
Claims (4)
1. a Flange joint does not tear blowout preventer well cementing casing pipe head open, comprise main body (1), setting head (2) and casing short joint (3), it is characterized in that: main body (1) top is flange, flange periphery axially has 4 with upper bolt hole, there is metal gasket ring sealed groove flange upper surface, flange circumference wall is provided with more than 3 top wire holes, top wire hole is built-in with jackscrew (4), main body (1) upper step hole is built-in with setting head (2), setting head (2) lower end is connected with casing short joint (3), jackscrew (4) inner inclined-plane is placed on above setting head (2), the setting head (2) of jackscrew (4) inner side is fixed with block (5), main body (1) middle wall is circumferentially with 2 with last fluid through-hole (6), fluid through-hole (6) is connected with safety-valve and emptying assembly.
2. Flange joint according to claim 1 does not tear blowout preventer well cementing casing pipe head open, it is characterized in that: have sealing ring in setting head (2) the contact surface groove coordinated with main body (1) stepped hole.
3. Flange joint according to claim 2 does not tear blowout preventer well cementing casing pipe head open, it is characterized in that: have sealing ring in jackscrew (4) external annular groove.
4. Flange joint according to claim 3 does not tear blowout preventer well cementing casing pipe head open, it is characterized in that: emptying assembly comprises oil pipe short circuit (7), the oil ninth of the ten Heavenly Stems (8), valve (9) and sebific duct (10), oil pipe short circuit (7) one end is connected with fluid through-hole (6), oil pipe short circuit (7) other end is connected with the oil ninth of the ten Heavenly Stems (8), the oil ninth of the ten Heavenly Stems (8) other end is connected with valve (9), and valve (9) other end is connected with sebific duct (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520139132.2U CN204457570U (en) | 2015-03-12 | 2015-03-12 | Flange joint does not tear blowout preventer well cementing casing pipe head open |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520139132.2U CN204457570U (en) | 2015-03-12 | 2015-03-12 | Flange joint does not tear blowout preventer well cementing casing pipe head open |
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| Publication Number | Publication Date |
|---|---|
| CN204457570U true CN204457570U (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520139132.2U Active CN204457570U (en) | 2015-03-12 | 2015-03-12 | Flange joint does not tear blowout preventer well cementing casing pipe head open |
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| CN (1) | CN204457570U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196489A (en) * | 2020-09-17 | 2021-01-08 | 中油国家油气钻井装备工程技术研究中心有限公司 | Pressure compensation rotary sealing structure |
-
2015
- 2015-03-12 CN CN201520139132.2U patent/CN204457570U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196489A (en) * | 2020-09-17 | 2021-01-08 | 中油国家油气钻井装备工程技术研究中心有限公司 | Pressure compensation rotary sealing structure |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |