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Used in conjunction with hydraulic control system,the annular blowout preventer(annular BOP) seals off the annulus of different sizeswhen drilling tool is set in the hole, when there is no drilling tool in the hole, it can also seal off the wellhead.If well blowout happens during the coring and measuring operation, it can seal off the annular spaces beteenthe well barrel and kelly, coring tool, cable and steelrope etc. matched with pressure-relief valve and buffertank, it can force-execute the running/retrieving drilloperation through butt-weld drilling-rod at 18 degreewithout fine thread.
There are two structure model of annular BOP, model A: tapered rubber; model D: spherical rubber.
Upper housing and the body have two connection forms as connection by bolts and connection by claw chuck.
Annular BOP with spherical rubber is composed of five parts as upper housing, body, piston, spherical rubber and anti-dust ring.
Annular BOP with tapered rubber is composed of seven parts as upper housing, wear plate, body, piston, tapered rubber, anti-dust ring and supporting cylinder.
The dynamic seal of annular BOP adopts the sealing ring of lip structure, which reduces the wearing of sealing ring to the maximum, and the sealing is reliable; the rubber is not easy to fold back, and there is the effect of funnel; and the well pressure has the function of assisting sealing, etc.
Tapered Annular Bop (Model A)
Model |
Bore(mm) |
Working pressure(Mpa/psi) |
Close volume(L) |
Open volume(L) |
Weight(kg)for reference |
FHZ18-70 |
179.4 |
70/10000 |
36 |
27 |
6293 |
FHZ28-70 |
279.4 |
70/10000 |
67 |
66 |
12290 |
FHZ35-70 |
346.1 |
70/10000 |
116 |
117 |
15190 |
FHZ43-35 |
425.4 |
35/5000 |
134 |
134 |
14100 |
FHZ54-14 |
539.7 |
14/2000 |
95.3 |
94.5 |
7660 |
Spherical Annular Blowout Preventer(Model D)
Model |
Bore(mm) |
Working pressure(Mpa/psi) |
Close volume(L) |
Open volume(L) |
Weight(kg)for reference |
FH18-21 |
179.4 |
21/3000 |
21 |
15 |
1433 |
FH18-35 |
35/5000 |
21 |
15 |
1520 |
|
FH23-21 |
228.6 |
21/3000 |
34 |
22.8 |
2398 |
FH23-35 |
35/5000 |
42 |
33 |
2986 |
|
FH28-21 |
279.4 |
21/3000 |
50 |
39 |
2950 |
FH28-35 |
35/5000 |
6 |
72 |
4675 |
|
FH35-21 |
346.1 |
21/3000 |
94 |
69 |
5738 |
FH35-35 |
35/5000 |
94 |
69 |
6415 |
|
FH48-35 |
425.3 |
35/5000 |
220 |
171 |
16000 |
FH53-21 |
427 |
21/3000 |
173 |
110 |
6994 |
FH54-35 |
539.7 |
35/5000 |
241 |
181 |
20230 |
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