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Wellhead Control EQP


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 2. Set srew 3. Left seal 4. Up blade
5. Top seal rubber 6. Up shear ram body
7. Blade seal 8. Set screw 9. Right seal 10. Down blade
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 resistant to high sulfer 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

Structural Features

Technical Parameter

U Ram BOP Specification&Model


Operating pressure
180-7  1/16 230-9 280-11 350-13 5/8 430-16 3/4 480-18 3/4 530-20 3/4 540-21 1/4 680-26 3/4
140-20000 U
105-15000 U U U U
70-10000 U U U U U U
35-5000 U U U U U U U
21-3000 U U U U U U U
14-2000 U

Note:S Ram BOP Specification&Model


U represents U type ram BOP


Specification&Model Main Bore
Working Pressure
Oil quantity for opening (Single Cylinder) Oil quantity for closing(Single Cylinder) Ram Type Ram Size
Dimension mm weight kg Recommended BOP code
length width height single double
single double
180(71/16 in)series FZ18-352FZ18-35 180(71/16) 35 4.6 4.6 U maximum5 1/2 2477(3273) 550 736 1116 1870 3586 C11.002
FZ18-702FZ18-70 180(71/16) 70 4.6 4.6 U maximum5 1/2 2487 (3363) 550 806 1216 2190 4095 C20.002
FZ18-1052FZ18-105 180(71/16) 105 4.6 4.6 U maximum5 1/2 2477(3273) 550 832 1242 2215 4066 C08.002
280(11in)series FZ28-352FZ28-35 280-11 35 10.6 10.8 U maximum8 5/8 3105 (4165) 650 898 1380 3775 6915 C06.002
FZ28-702FZ28-70 280-11 70 10.6 10.8 U maximum8 5/8 3035(4065) 660 950 1430 3900 7115 C09.002
FZ28-1052FZ28-105 280-11 105 10.9 11.1 U maximum7 5/8 3035(4396) 820 1205 1840 6660 11750 C01.002
FZ28-1402FZ28-140 280-11 140 30.1 26.6 U maximum6 5/8 3890(5104) 1050 1470 2200 9525 16933 C10.002
346(135/8 in)series FZ35-352FZ35-35 346(135/8) 35 21 22 U maximum10 3/4 3647(4833) 720 928 1501 5150 9750 C21.002
FZ35-702FZ35-70 346(135/8) 70 21 22 U maximum10 3/4 3707(4893) 745 1115 1720 6020 10940 C17.002
FZ35-1052FZ35-105 346(135/8) 105 22.8 23.7 U maximum10 3/4 3957(5319) 850 1340 2076 9310 16210 C16.002
540(211/4 in)series FZ54-142FZ54-14 540(211/4) 14 16.3 17.4 U maximum 16 4120(5800) 1000 944 1638 7450 14420 C25.002
540(211/4 in)series FZ54-352FZ54-35 540(211/4) 35 51 56 U maximum16 4884(6364) 1080 1300 2100 13720 26500 C27.002
FZ54-702FZ54-70 540(211/4) 70 51 56 U maximum16 4884(6364) 1200 1742 2542 15718 29773 C28.002
680(263/4) FZ68-212FZ68-21 680(263/4) 21 36 37 U maximum20 5305(6646) 1280 1214 1924 13300 24800 C24.002
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 Type BOP model Recommended BOP code Cylinder Type Specification of drill pipe
U (2)FZ28-35 (2)C06.00 Normal cylinder
(2)C06.00 Cylinder with tandem booster 5 1/2"  24.7lb/ft  G-105  PSL-3
(2)FZ28-105 (2)C01.00 Normal cylinder
(2)C01.00 Cylinder with tandem booster 5 1/2"  24.7lb/ft  G-105  PSL-3
(2)FZ 35-35 (2)C21.00 Normal cylinder 5"  19.5lb/ft  G-105  PSL-3
(2)C26.00 Cylinder with tandem booster 5 1/2"  24.7lb/ft  S-135  PSL-3
(2)FZ 35-70 (2)C17.00 Normal cylinder 5"  19.5lb/ft  G-105  PSL-3
(2)C30.00 Cylinder with tandem booster 5 1/2"  24.7lb/ft  S-135  PSL-3
(2)FZ 35-105 (2)C16.00 Normal cylinder 5"  19.5lb/ft  G-105  PSL-3
(2)C23.00 Large cylinder 5 1/2"  24.7lb/ft  G-105  PSL-3
(2)FZ 54-35 (2)C27.00 Normal cylinder 6 5/8 "  27.7lb/ft  S-135  PSL-3


U Type Variable Ram Range


BOP Type BOP Model Range of Variable Ram (in)
U (2)FZ 28-35 2 7/8"-5"
(2)FZ 28-70 2 7/8"-5"
(2)FZ 35-35 2 3/8"-3 1/2" 2 7/8"-5"
(2)FZ 35-70 2 3/8"-3 1/2" 2 7/8"-5"
(2)FZ 35-105 3 1/2"-5" 4 1/2"-5 1/2"
(2)FZ 54-35 2 7/8"-5 7/8"
Raw materials mainly include carbon steel, alloy steel, stainless steel, aluminum, and copper, etc., commonly used materials are 45#, Q235, Q345, 35Mn, 65Mn, 40Cr, 35CrMo, 42CrMo, 4140, 20CrMnTi, 20CrNiMo, 304, 310, 316, 431, Al, Copper, etc.
Forging equipment has 160tons, 300 tons, 400 tons, 630 tons, 1000 tons, 1600 tons, and 2500 tons, can forge ten grams to 55 kilograms of rough forging or precision forging products.
Machining equipment has lathe, drilling machine, grinder, wire cutting, CNC and so on.
Heat treatment includes normalizing, tempering, annealing, quenching, solid solution, carburizing, etc
The surface treatment includes shot blasting, spray painting, electroplating, electrophoresis, phosphate and so on
The testing equipment includes spectrometer, metallographic analyzer, hardness meter, tensile machine, impact testing machine, fluorescent magnetic particle flaw detector, ultrasonic flaw detector, three coordinates, etc
Products are widely used in petrochemical industry, engineering machinery, auto parts, locomotive and railway parts, metallurgy, shipbuilding, military products and other fields.
Mold development process
The R&D team conducts CAD design, CAM, UG, SOLIDWORKS modeling work.
We use superfine die steels as the raw material, allowing them to be processed with a CNC center, ensuring that the die steel’s precision is ensured and has excellent fatigue resistance, abrasive resistance, making sure that the forgings are produced in high quality.
There are more than 2000 sets of molds here at our company. The customers can choose any of them for processing to minimize cost. We perform inventory taking, clearing and recording every week to ensure that the production proceeds as scheduled.
Our mold warehouse is managed by following the IATF16949 quality management system and “6S lean management”, giving a long service life to the mold and making it convenient for use and storage.
Design and manufacturing
We will design and manufacture forging molds on receipt of the customer’s drawings or samples, then we will manufacture the mold by following the mold design. The molds often include forging dies, trimming dies.
Steel billet cutting and heating
Often, we will prepare the frequently used material in stock featuring material No. of 20#, 35#, 45#, 20Cr, 40Cr, 20CrMnTi, 20CrMo, 30CrMo, 35CrMo, 42CrMo, Q235, Q345, A105 etc. Then an intermediate frequency furnace will be used for heating the raw materials into certain temperature and finally putting the eating rod on the metal framework for forging.
Before metal forging process starts, the top and bottom dies shall be connected to anvil block of forging press. Then the workers will pick the metal materials and put them between the forging dies to achieve desired shape by pressing the metal materials several times with a high-speed.
After the forging completed, there will be unwanted burrs around the forged blanks, so removing the burrs is a necessary step. Which requires the workers to mount the trimming dies under the punching press, then pressing the forged blanks to clean burrs on the surface of the forgings.
Heat treatment
Heat treatment process helps to get the required mechanical performance and hardness of products. The heat treatment techniques cover normalizing, quenching, annealing, tempering, hardening and so on.
Shot blasting
After shot blasting process, the forgings will have a smoother and cleaner surface than it would have been. Usually the surface smoothness of the forgings is available in Ra6.3, which is even smoother than that of the lost-wax casting.
For some components, the forging process is not available in the required tolerance, under this case, processing is optional. We will conduct the product processing with different processing equipment, including milling machine, boring machine, drill press, grinding machine, numerical control machine etc.
Surface treatment
In most cases, if no specific requirements required, we will have water/oil rust protection treatment on the surface of the forgings. We can also conduct other surface treatments, including paint spraying, powder coating, electroplating, electrocoating to meet specific needs of our customers.
Final examination
We will have an inspection on the product size to ensure high quality of our products.Sometimes, we also have mechanical performance and chemical components testing on our products.
Package and delivery
In most cases, the forged components will be packaged in polyethylene bags and then being put into firm wooden boxes. We are also able to customize packages according to the customer’s needs. As we are located in Ruian forgings industrial park, we have easy access to raw materials supply, which is cost effective on the whole.

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