CN2405005Y

CN2405005Y - Ratary blow-out preventer for drilling

Info

Publication number: CN2405005Y
Application number: CN 99241649
Authority: CN
Inventors: 魏明扬; 王福培; 秦世宽
Original assignee: Sichuan Petroleum Administration Bureau
Current assignee: Sichuan Petroleum Administration Bureau
Priority date: 1999-11-24
Filing date: 1999-11-24
Publication date: 2000-11-08
Anticipated expiration: 2009-11-24

Abstract

The utility model relates to a rotary blowout preventer for drilling, which is used for underbalance drilling and belongs to the technical field of well control devices of the underbalance drilling. The utility model comprises a rotary assembly and a shell body, wherein, the rotary assembly is provided with an upper and a lower rubber cores. A bearing and a V-shaped packing is provided with forced lubrication and water injection cooling. The rotary blowout preventer for drilling changes problems that after a single rubber core in the prior art is damaged, the single rubber core can not be effectively sealed, and the bearing and the V-shaped packing are easy to damage due to heat generation. The utility model has the advantages that due to the adoption of double rubber cores, sealing is more effective, and because of the forced lubrication and the cooling, the bearing and the packing are not easy to generate heat. The rotary blowout preventer for drilling is characterized in that a clamping hoop is used for connecting the rotary assembly and the shell body, and has the advantages of convenient and easy replacement of the upper and the lower rubber cores.

Description

A kind of drilling rotary blowout preventer

A kind of drilling rotary blowout preventer is used under balance pressure drilling, belongs under balance pressure drilling well-control equipment technical field.

At present, the balanced drilling technology that China also is to use basically, a spot of preventer that is used under balance pressure drilling mainly contains the single rubber core rotating blowout preventer, abroad, rotating blowout preventer as Xie Fuer company mainly is a single rubber core, and be monolithic, and there is not the packing cooling duct, the shortcoming of prior art is: because it adopts substantially is single rubber core, so, when the single rubber core that is installed in the bottom, the back sealing that is worn in drilling process just is difficult to realize that the bearing of prior art is mainly by annotating butter, so can not be lubricated bearing effectively, cause the damage of bearing easily, do not cool off, so supporting positive cover and V-type packing very easily generate heat and damage at the bottom packing of prior art equipment.

The purpose of this utility model is to design a kind of double density sealing cored structure that has, to upper and lower supporting positive cover, bearing and V-type packing can impose forced feed lubrication or cooling, can check the sealing situation of upper and lower glue core at any time by peep hole, and it is as a whole to rotate the design of assembly and packing unit, so that a kind of drilling rotary blowout preventer of dismounting.

The utility model is achieved in that the utility model comprises rotation assembly and housing, lower glue core is fixed on the bottom of central tube, the gluing core is fixed on the top of central tube, outside by clamp connection rotation assembly and housing, when lower glue core need be changed, as long as pull down clip, just can propose lower glue core changes, in the time of need changing the glue core, as long as it is just replaceable to pull down the top adpting flange, can carry out forced feed lubrication to bearing by the through hole that is located in the sliding bearing supporting positive cover of top, by the water injection hole of bottom setting, can be to the V-type packing, the cooling that circulates of supporting positive cover and cold sink.

The utility model has the advantages that: because employing is two glue cores, its sealing is more effective, can prolong its application life effectively and guarantee its sealing effectiveness to the forced feed lubrication of bearing with to the water filling cooling of packing, simultaneously, because the replacing of glue core is convenient in the effect of the utility model clip.

Fig. 1 is an assembling schematic diagram of the present utility model.

Fig. 2 is Fig. 1 structural representation of half-twist to the right in the utility model.

Provide embodiment of the present utility model below in conjunction with accompanying drawing: the utility model comprises a rotation assembly and a housing, in the rotation assembly, be provided with a central tube 6, the top of central tube 6 is provided with one and goes up adpting flange 1, be fixed on the central tube 6 by bolt and alignment pin 3, be provided with a gluing core 2 on the top of central tube 6, be provided with an oil pressure capsule 5 in the annular space between gluing core 2 and the central tube 6, be provided with a lower glue core on the top of central tube 6 and leak peep hole 4, a sliding bearing supporting positive cover 8 is arranged in the outside of central tube 6, in sliding bearing supporting positive cover 8, be provided with grease channel 10, its outside is provided with lubrication oil injection hole 9 and tap 12, outside, the middle part of central tube 6 is provided with radially cone rolling 13 of an axial ball bearing 11 and, be provided with V-type packing 16 in the bottom of central tube 6, abrasionproof supporting positive cover 17, cold sink 15, with cooling water inlet 18 and outlet opening 25, also be provided with a lower glue core 20 in the bottom of central tube 6, be fixed on the central tube 6 by bolt 19; On housing 26, be provided with an injection hole 28, the bottom of housing 26 and transversely be respectively equipped with the

flange

22 and 21 of big latus rectum, on housing 26, also be provided with a V-type packing seepage peep hole 27, clip 23 is arranged on the outside of housing 26, by 4 bolts, 24 fixedly connected rotation assembly and housings 26, when operation, on drilling tool, adorn a leading cone, by upper flange 1, pass gluing core 2 and lower glue core 20, connecting drill bit again is lowered in the well head, connecting well head and this preventer can operate, in drilling process, be worn as lower glue core 20, well liquid will be gone up to the annular space of gluing core 2 and central tube 6, just can see and determine whether changing lower glue core 20 by peep hole 3, wearing and tearing as gluing 2 are not serious, can be by oiling joint 7 to 5 oilings of oil pressure capsule, force gluing core 2 to pack tightly drilling tool and play sealing function, in drilling process, by to 9 oilings of lubrication oil injection hole, make sliding bearing supporting positive cover 8 and axial ball bearing 11 and radially cone rolling 13 be immersed in the lubrication oil, lubrication oil can make the lubricated circulation that realizes by tap 12, by to bottom cooling water injection hole 18 water fillings, make cold sink 15, V-type packing 16 and abrasionproof supporting positive cover 17 obtain cooling, when bottom glue core 20 needs to change, as long as unclamp 4 set bolts 24 on the clip 23, just the rotation assembly can be proposed and plays the replacing of glue 20 together with lower glue core 20, when needing to change gluing core 2, as long as pulling down adpting flange 1 can carry out, by observing the abrasion condition that V-type packing weepage holes 27 can be understood V-type packing 16, the injection hole 28 that is provided with on the housing 26 can carry out special operation or do pressure release and use, last adpting flange 1 can connect preventer, slips, manual slip and other the not kill-job equipment that makes a trip, 26 times adpting flanges 22 of housing can be connected annular preventer with horizontal adpting flange 21, hydraulic operated valve and other equipment, 14 are the sealing ring between rotation assembly and the housing.

Claims

1. a drilling rotary blowout preventer is made of rotation assembly and housing, it is characterized in that:

A. in described rotation assembly, be provided with a central tube, top is provided with an adpting flange, be fixed on the central tube by nut and alignment pin, be provided with a gluing core on the top of central tube, be provided with an oil pressure capsule in the annular space between gluing core and central tube, be provided with a lower glue core on the top of central tube and leak peep hole, a sliding axle Chengfu cover is arranged in the outside of central tube, in the sliding bearing supporting positive cover, be provided with grease channel and forced feed lubrication oil injection hole and tap, outside, the middle part of central tube is provided with radially cone rolling of an axial ball bearing and, be provided with the V-type packing in the central tube bottom, the abrasionproof supporting positive cover, cold sink and cooling water inlet and outlet opening also have a lower glue core in the bottom of central tube, by being bolted on the central tube;

B. be provided with an injection hole in described lower housing portion, lower housing portion and the horizontal adpting flange that a big latus rectum is respectively arranged also are provided with a V-type packing seepage peep hole on the housing, and hull outside also is provided with a clip.

2. a kind of drilling rotary blowout preventer according to claim 1 is characterized in that the endoporus of described gluing core is a upper circular, and the bottom is square.

3. a kind of drilling rotary blowout preventer according to claim 1 is characterized in that, described rotation assembly and housing are fixing by clamp connection.