CN101377122B - Flow divider for sea petroleum well drilling - Google Patents
Flow divider for sea petroleum well drilling Download PDFInfo
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- CN101377122B CN101377122B CN 200810231844 CN200810231844A CN101377122B CN 101377122 B CN101377122 B CN 101377122B CN 200810231844 CN200810231844 CN 200810231844 CN 200810231844 A CN200810231844 A CN 200810231844A CN 101377122 B CN101377122 B CN 101377122B
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Abstract
The present invention discloses a shunt of an oceanic petroleum-drilling riser system. The shunt is provided with a spherical rubber core, which is placed in a top cover that has a spherical cavity and matches the shape of the spherical rubber core, and a piston, which can push the spherical rubber core to move along the curved track of the cavity of the top cover, is arranged under the spherical rubber core. During normal operation, the spherical rubber is opened, slurry returns into a slurry pool through a return pipeline to circulate, and when an emergency occurs, hydraulic pressure enters in from a closed oil cavity to push the piston to move upwards, so that the spherical rubber is pushed to move upwards along the inner curved surface of the top cover to fully seal an inlet or seal a string. The shunt can protect personnel or equipment on a rotary platform. The shunt, which has the advantages of simple and compact structure, convenient operation and reliable mounting, can fully meet the working requirements of an oceanic drilling riser.
Description
Technical field
The invention belongs to oil, natural gas probing well equipment technology field, specifically should invention can adapt in any marine drilling process and a kind of part flow arrangement of use.
Background technology
At present, in the process of offshore oil drilling, mostly provide a fluid pipeline with the drilling water-separation pipe system, the under water BOP of this pipeline above drilling equipment extends to well head.The top of drilling water-separation pipe system is exactly diverter unit.Current divider is the control system that the safety for personnel and equipment provides a low pressure to flow, to guide controlled or without the well liquid row of the control zone from rig floor.
In the drilling process of routine, the outlet opening of current divider will return mud and turn back in the slurry tank, play the effect of guiding mud.In well control operation or other drilling process, gas may enter in the marine riser in some cases, and shunt system provides a kind of safe mode to get rid of gas in the marine riser, with its row from operation field.In the complete out of control situation of drilling well, personnel and equipment can't be withdrawn from the well site immediately, should consider to adopt current divider as ancillary service, take action to be implemented in, when evacuating people, safely out of control well liquid are shunted.
What the drilling water-separation pipe system of China adopted mostly is import equipment, and the shunt system that is applicable to ocean marine riser drilling well is a blank for China.
Summary of the invention
The objective of the invention is to design a kind of current divider that is applicable to the Offshore Drilling Riser system, to satisfy the actual needs of marine drilling.
Briefly, a kind of current divider for ocean oil drilling, it has spherical glue core, and spherical glue core is positioned in the inner chamber top cover spherical in shape and that coincide with spherical glue core profile, is provided with under spherical glue core and promotes its piston along top cover inner chamber spherical arc shape orbiting motion.
Piston among the present invention is hydraulic piston, and piston is positioned at the plunger shaft that inner housing and connector surround for " L " shape and piston; The connector upper end is connected with top cover, and the lower end is connected with inner housing, and leaving the gap between inner housing and the connector is hydraulic piston, and has opening oil pocket and closing oil pocket of being connected with the hydraulic piston upper and lower respectively in connector; Top cover, spherical glue core, connector, piston, inner housing are inserted in the shell body and each contact site sealing according to aforementioned connecting to form for core assembly integral body; Shell body has two side mouths to be respectively the discharge shunt conduit, and the step that protrude on its top and table beam are fixedly connected and are integrated.
Spherical glue core is to have flexible material to make and can shrink under the effect of external force with sealing tubing string or open hole to guide the flow direction of mud or oil gas.
Be provided with outside body skin the locking device that shell body and connector are connected and fixed.The annular groove of locking device lock pin Snap joint body.Locking device is hydraulic locking mechanism or snap ring manual locking.
Adopt rectangular seal between shell body and the inner housing or adopt other sealing ring.
Sealing is adopted the sealing ring of spherical glue core or annular rubber core and is fixed with hold-down bolt between inner housing bottom and the shell body.
Hydraulic piston opening between piston and top cover is equipped with dust ring.
The side mouth of shell body is the side mouth of flange form or other form.
A kind of current divider that is applicable to the Offshore Drilling Riser system of the present invention, be installed in the top of drilling water-separation pipe, and the miscellaneous part of riser system forms one and is communicated with the passage between the BOP group and hull under water, in the drilling process of routine, the outlet opening of current divider will return mud and turn back in the slurry tank, play the effect of guiding mud; During emergency, shunt system provides a kind of safe mode to get rid of gas or liquid in the marine riser, and its row from operation field, is guaranteed the safety of personnel and equipment on the rig floor.
Description of drawings
Fig. 1 is structural representation of the present invention.
The figure number explanation:
1, top cover; 2, spherical glue core; 3, connecting bolt; 4, connector; 5, dust ring; 6, piston; 7, shell body; 8, inner housing; 9, rectangular seal; 10, sealing ring; 11, hold-down bolt; 12, connecting bolt; 13, sealing ring; 14, sealing ring; 15, locking device.
The specific embodiment
The specific embodiment of the invention as shown in Figure 1, diverter unit is comprised of main parts size such as top cover 1, spherical glue core 2, connecting bolt 3, connector 4, dust ring 5, piston 6, shell body 7, inner housing 8, rectangular seal 9, sealing ring 10, hold-down bolt 11, connecting bolt 12, sealing ring 13, sealing ring 14 and locking devices 15.Piston 6 is positioned at the plunger shaft that inner housing 8 and connector 4 surround for " L " shape and piston 6; Connector 4 upper ends are connected with top cover 1, and the lower end is connected with inner housing 8, and leaving the gap between inner housing 8 and the connector 4 is hydraulic piston, and have opening oil pocket and closing oil pocket of being connected with the hydraulic piston upper and lower respectively in connector 4; Top cover 1, spherical glue core 2, connector 4, piston 6, inner housing 8 are inserted in the shell body 7 and each contact site sealing according to aforementioned connecting to form for core assembly integral body; Shell body 7 has two side mouths to be respectively the discharge shunt conduit, and the step that protrude on its top and table beam are fixedly connected and are integrated.Spherical glue core 2 is for having flexible material and make and can shrinking under the effect of external force with sealing tubing string or open hole to guide the flow direction of mud or oil gas.Outside shell body 7, be provided with the locking device 15 that shell body 7 and connector 4 are connected and fixed.The annular groove of locking device 15 lock pin Snap joint bodies 4, locking device are hydraulic locking mechanism or snap ring manual locking.Adopt rectangular seal 9 between shell body 7 and the inner housing 8 or adopt other sealing ring.Sealing is adopted the sealing ring 10 of spherical glue core or annular rubber core and is used hold-down bolt 11 fixing between inner housing 8 bottoms and the shell body 7.Hydraulic piston opening between piston 6 and top cover 1 is equipped with dust ring 5.The side mouth of shell body 7 is side mouths of flange form or other form.
Erection sequence of the present invention is: first rectangular seal 9 is put into the groove of inner housing 8 correspondences, with sealing ring 10 and hold-down bolt 11 lower rectangular seal 9 is compressed; Connecting bolt 12 connects as one connector 4 and inner housing 8, compresses simultaneously upper rectangular seal 9; Then, the connector 4 of in order piston 6, dust ring 5, spherical glue core 2 being packed into; At last top cover 1 and connector 4 usefulness connecting bolts 3 are connected as one.Except shell body 7, the parts that remaining assembling parts rises are called fuse.Shell body 7 has two side mouths, for discharging shunt conduit; The step that protrude on top and table beam are fixedly connected and are integrated.
Operating principle: after discharging final section marine riser and expansion joint, top flexible coupling under in seawater, the lower end of current divider fuse and the upper end of flexible coupling connect as one by flange, then the annular groove that blocks in the fuse with the instrument of transferring is put into shell body 7 with fuse integral body, and the boss of shell body 7 endoporus is supporting the weight of whole riser system.The lock pin of last locking device 15 is by the annular groove of hydraulic control system Snap joint body 4, prevents the fuse play that makes progress.During normal operation, spherical rubber is opened, and mud turns back to mud pit by return line and circulates, when in case of emergency, to enter pushing piston up from closing oil pocket for hydraulic pressure, moves upward along the intrados of top cover thereby promote spherical rubber, thereby entirely seal import or seal tubing string.Provide protection to the personnel on the turntable or equipment.
Claims (7)
1. current divider for ocean oil drilling, its feature has spherical glue core (2), spherical glue core (2) is positioned in the inner chamber top cover (1) spherical in shape and that coincide with spherical glue core (2) profile, is provided with under spherical glue core (2) and promotes its piston (6) along top cover (1) inner chamber spherical arc shape orbiting motion; Piston (6) is hydraulic piston, and piston (6) is positioned at the plunger shaft that inner housing (8) and connector (4) surround for " L " shape and piston (6); Connector (4) upper end is connected with top cover (1), the lower end is connected with inner housing (8), leaving the gap between inner housing (8) and the connector (4) is hydraulic piston, and has opening oil pocket and closing oil pocket of being connected with the hydraulic piston upper and lower respectively in connector (4); Top cover (1), spherical glue core (2), connector (4), piston (6), inner housing (8) are inserted in the shell body (7) and each contact site sealing according to aforementioned connecting to form for core assembly integral body; Shell body (7) has two side mouths to be respectively the discharge shunt conduit, and the step that protrude on shell body (7) top and table beam are fixedly connected and are integrated.
2. a kind of current divider for ocean oil drilling according to claim 1 is characterized in that spherical glue core (2) is for having flexible material and make and can shrinking with sealing tubing string or open hole to guide the flow direction of mud or oil gas under the effect of external force.
3. a kind of current divider for ocean oil drilling according to claim 1, its feature are provided with the locking device (15) that shell body (7) and connector (4) are connected and fixed outside shell body (7).
4. a kind of current divider for ocean oil drilling according to claim 3 is characterized in that the annular groove of locking device (15) lock pin Snap joint body (4), and locking device is hydraulic locking mechanism or snap ring manual locking mechanism.
5. a kind of current divider for ocean oil drilling according to claim 1 is characterized in that adopting rectangular seal (9) between shell body (7) and the inner housing (8).
6. a kind of current divider for ocean oil drilling according to claim 1 is characterized in that the hydraulic piston opening between piston (6) and top cover (1) is equipped with dust ring (5).
7. a kind of current divider for ocean oil drilling according to claim 1, the side mouth that it is characterized in that shell body (7) is flange form side mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810231844 CN101377122B (en) | 2008-10-08 | 2008-10-08 | Flow divider for sea petroleum well drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810231844 CN101377122B (en) | 2008-10-08 | 2008-10-08 | Flow divider for sea petroleum well drilling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101377122A CN101377122A (en) | 2009-03-04 |
| CN101377122B true CN101377122B (en) | 2013-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810231844 Active CN101377122B (en) | 2008-10-08 | 2008-10-08 | Flow divider for sea petroleum well drilling |
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| Country | Link |
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| CN (1) | CN101377122B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108915622B (en) * | 2018-08-07 | 2021-02-02 | 伟卓石油科技(北京)有限公司 | Offshore oil drilling shunt |
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| Publication number | Publication date |
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| CN101377122A (en) | 2009-03-04 |
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