BOP Well Control Equipment

The ultimate solution for onshore & offshore BOPs.

Ram BOP--U Type

Ram BOP--U Type

The ultimate solution for onshore & offshore BOPs.

PDF View
  • Introduction

  • specification

U Type Ram BOP


Structual Feature
●  Pressurized components are forging matierals, having good strength and impact toughness, avoid the forging default.
●  Middle flange uses combined seal, its switch is operated by hydraulic pressure, easy to change the ram.
●  Equipped with auxiliary oil cylinder, compared with the traditional shear ram BOP, it has the function, smaller volume.
●  Ram rubber is abundant, and use self-contained seal.
●  Manual locking device belongs to the standard configuration, In the event of hydraulic loss, it can ensure that ram remains closed.
●  Manual and hydraulic locking device and auxiliary oil cylinder can be equiped according to customer's requirements flexibly, and easy to interchange.
●  The internal shell of BOP resistant to low temperature can process pipeline, to make the steam flow inside the BOP, radiat heat. (for costumer’s option).
●  The internal part of BOP resistant to high sulfer which contact the well liquid has Surfaced high nickel base alloy, which can achieve the highest levels of resistance to H2S and CO2.

Ram Assembly
●  Pipe Ram

1. Top seal rubber 2. Ram body 3. Front seal rubber
U type Ram structure skech


Shear Ram
       Shear ram can cut pipe the well, blindly close the wellhead, and also used as blind ram when there is no pipe in the well. The installation of shear ram is the same with the original ram.
●  In the normal condition used as blind ram, in case of emergency, used as shear ram.
●  Shear damper can be repeatedly cut pipe and not damage the blade, The weared the blade can be reused after the repair. Shenkai produces the shear ram with shear life in more than five times, Allowed to replace the sealing rubber.
●  The ordinary ram blade is integrated with the ram body.
●  The ram blade of BOP resistant to high sulfer is separated with the ram body, which is easy to change blade after blade damaged, and make the ram body be able to repeated use.
●  The contact sealing surface between top seal of shear ram and blade is large, which effectively reduce the pressure on the rubber sealing surface, and prolong its life.

1. Down shear ram body 2. Left seal rubber
3. Up shear ram body 4. Top seal rubber
5. Right seal rubber 6. Blade seal

Shear Ram Assembly Structure of U type Ram BOP

Variable Ram
 Variable ram can be used to seal different diameter of pipe string. Variable ram is composed of variable ram, top seal, variable front seal. The installation of variable ram in the BOP is in the same as the common ram, don't need to change any part of the BOP.

1. Variable Ram rubber 2. Ram body 3. Top seal rubber
Variable Ram Assembly Structure of U type Ram BOP


U Ram BOP Specification&Model


Operating pressure
180-7  1/16230-9280-11350-13 5/8430-16 3/4480-18 3/4530-20 3/4540-21 1/4680-26 3/4

Note:S Ram BOP Specification&Model


U represents U type ram BOP


Specification&ModelMain Bore
Working Pressure
Oil quantity for opening (Single Cylinder)Oil quantity for closing(Single Cylinder)Ram TypeRam Size
Dimension mmweight kgRecommended BOP code
180(71/16 in)seriesFZ18-352FZ18-35180(71/16)354.64.6Umaximum5 1/22477(3273)550736111618703586C11.002
FZ18-702FZ18-70180(71/16)704.64.6Umaximum5 1/22487 (3363)550806121621904095C20.002
FZ18-1052FZ18-105180(71/16)1054.64.6Umaximum5 1/22477(3273)550832124222154066C08.002
280(11in)seriesFZ28-352FZ28-35280-113510.610.8Umaximum8 5/83105 (4165)650898138037756915C06.002
FZ28-702FZ28-70280-117010.610.8Umaximum8 5/83035(4065)660950143039007115C09.002
FZ28-1052FZ28-105280-1110510.911.1Umaximum7 5/83035(4396)82012051840666011750C01.002
FZ28-1402FZ28-140280-1114030.126.6Umaximum6 5/83890(5104)105014702200952516933C10.002
346(135/8 in)seriesFZ35-352FZ35-35346(135/8)352122Umaximum10 3/43647(4833)720928150151509750C21.002
FZ35-702FZ35-70346(135/8)702122Umaximum10 3/43707(4893)74511151720602010940C17.002
FZ35-1052FZ35-105346(135/8)10522.823.7Umaximum10 3/43957(5319)85013402076931016210C16.002
540(211/4 in)seriesFZ54-142FZ54-14540(211/4)1416.317.4Umaximum164120(5800)10009441638745014420C25.002
540(211/4 in)seriesFZ54-352FZ54-35540(211/4)355156Umaximum164884(6364)1080130021001372026500C27.002
Note 1. BOP Testing pressure is 1.5 times of standard pressure
2. Operating pressure is from 8.4Mpa to 10.5Mpa


U Type Shear Ram Operating specification


BOP TypeBOP modelRecommended BOP codeCylinder TypeSpecification of drill pipe
U(2)FZ28-35(2)C06.00Normal cylinder\
(2)C06.00Cylinder with tandem booster5 1/2"  24.7lb/ft  G-105  PSL-3
(2)FZ28-105(2)C01.00Normal cylinder\
(2)C01.00Cylinder with tandem booster5 1/2"  24.7lb/ft  G-105  PSL-3
(2)FZ 35-35(2)C21.00Normal cylinder5"  19.5lb/ft  G-105  PSL-3
(2)C26.00Cylinder with tandem booster5 1/2"  24.7lb/ft  S-135  PSL-3
(2)FZ 35-70(2)C17.00Normal cylinder5"  19.5lb/ft  G-105  PSL-3
(2)C30.00Cylinder with tandem booster5 1/2"  24.7lb/ft  S-135  PSL-3
(2)FZ 35-105(2)C16.00Normal cylinder5"  19.5lb/ft  G-105  PSL-3
(2)C23.00Large cylinder5 1/2"  24.7lb/ft  G-105  PSL-3
(2)FZ 54-35(2)C27.00Normal cylinder6 5/8 "  27.7lb/ft  S-135  PSL-3


U Type Variable Ram Range


BOP TypeBOP ModelRange of Variable Ram (in)
U(2)FZ 28-352 7/8"-5"
(2)FZ 28-702 7/8"-5"
(2)FZ 35-352 3/8"-3 1/2"2 7/8"-5"
(2)FZ 35-702 3/8"-3 1/2"2 7/8"-5"
(2)FZ 35-1053 1/2"-5"4 1/2"-5 1/2"
(2)FZ 54-352 7/8"-5 7/8"

Follow Us

Tel: +1-832-600-8339
Address: 10700 Richmond Ave Ste. 207 Houston, Texas 77042;Our salespersons will be reaching out to you directly to assist with your oil and gas needs and we looking forward to serving you better!

Copyright @2014 Boss Oilwell Products & Manufacturing, Inc