Shaffer type annular BOP and Ram BOP

Shaffer BOP type：Spherical BOP Annular ，single ，Double Ram BOP.

size and working pressure:7-1/16″ 3000,7-1/16″ 5000, 7-1/16″ 10000,11″ 3000, 11″ 5000  ,13-5/8″ 3000  ,13-5/8″ 5000,20-3/4″ 3000 ,21-1/4″ 2000 .

Who can produce The shaffer BOP and spare?

Tianjin Dongrui Petroleum Machinery Co.,Ltd

Shaffer SL SLX Models

Flat doors simplify ram changes. To change the rams, apply opening hydraulic pressure to move the rams to the full open position. Remove the door cap screws and swing the door open. Remove the ram from the ram shaft and replace it. It is not necessary to apply closing hydraulic pressure to move the rams inward to clear the door.

Door seals on most sizes have a hard backing moulded into the rubber. This fabric and phenolic backing prevents extrusion and pinching at all pressures to assure long seal life.Internal H2S trim is standard. All major components conform to API and NACE H2S requirements.

Maximum ram hardness Is Rc22 to insure H2S compatibility of pipe and blind rams. Shear rams have some harder components

Manual-lock and Poslock pistons can be interchanged on the same door by replacing the ram shaft, piston assembly and cylinder head.

Wear rings eliminate metal-to-metal contact between the piston and cylinder to increase seal life d virtually eliminate cylinder bore wear.

This types of shaffer BOP rams offer a lip type piston seals that are long-wearing polyurethane with molybdenum disulfide moulded in for lifetime lubrication..

Lip-type ram shaft seals hold the well bore pressure and the opening hydraulic pressure. No known failures of this highly reliable high pressure seal have occurred.

Secondary ram shaft seals permit injection of plastic packing if the primary lip-type seal ever fails. Fluid dripping from the weep hole in the door indicates that the primary seal is leaking and the secondary seal should be energised.

Rams are available which will support a 600,000 pounds when a tool joint is lowered onto the closed rams. These rams conform to H2S requirements.

Shear rams cut drill pipe and seal in one operation. Most common weights and grades of drill pipe are sheared with less than 1,500 psi hydraulic pressure.

Poslock operators automatically lock the rams each time they are closed. This eliminates the cost of a second hydraulic function to lock. It also simplifies emergency operation because the rams are both closed and locked just by activating the close function.

Two kinds of locking systen could be chosen:the manual locking system and the automatic hydaulic locking system

Not only the pipe rams and blind rams but aslo the variable bore rams and shear rams are available without any structure change,It is easy and convenient on-site to open the bonners by hydraulic pressure

The outlets on the both sides of the body make the operation on site flexible

The pressurized self-sealing sealing mechanism is used between the body and bonnets,so it is not necessary to apply too much pretightening force to secure the reliability of sealing

It is very convenient to lift and transport the BOPs with the four lifting rods

The new sealing mechanism of ram shaft secures the sealing reliability under the high pressure

The ring grooves of flanges are all lined with the corrosion resistant alloy

Matched-manufacturing is not necessary for the bonnets and body,so the diserepancy could be eliminated by thestructure.And it is convenient for the maintenance in the future

According to the latest API Spec 16A standard

According to the latest API Spec Q1 , quality standard of IOS9001 and NACE-MR-01-75 ,H2st Trim

According to user requirements and the use of environmental can choose casting or forging.

Shaffer Annular BOP Features And Manuals

Shaffer Spherical™ blowout preventers are compact, annular type BOPs that seal reliably on almost any shape or size — oil and gas Kellys, D/Ps, drill pipe tool joints, drill collars, casing, or wireline. Sphericals also provide positive pressure control for stripping drill pipes into and out of the hole. They are available in bolted cover, wedge cover, dual wedge cover, and NXT models.Rugged, reliable sealing element provides positive seal after hundreds of tests to full working pressure.Strong, simple construction — only five major parts.Compact body saves space. Height is 15 to 20% less than height of some other annular BOPs.Simple hydraulic system. Only two hydraulic connections are needed.Wear rings on moving parts prevent metalto-metal contact. This feature prolongs preventer life.Suitable for H2S service. Standard models are suitable for internal H2S service, and simple bolt and lifting shackle changes convert them for external H2S service.Servicing is easy. Element can be changed without getting mud or grit into the hydraulic system.Steel segments reinforce sealing element but do not protrude into well bore when element is open.Element design provides long stripping life.

Shaffer Bolted Cover spherical BOP

The Spherical features the following advantages:

Few parts, strong construction

Rugged, reliable sealing element

Steel segments to strengthen rubber sealing element

Smooth, dependable action

Compact, forged body saves space

Easy servicing

Wear bands to prevent metal-to-metal contact

Simple operating requirements

Lightweight mode

According to the latest API Spec 16A standard

According to the latest API Spec Q1 , quality standard of IOS9001 and NACE-MR-01-75 ,H2st Trim

The ring grooves of flanges are all lined with the corrosion resistant alloy

The added wear-belts to the original design can prevent and improve the Cylinder-grinding because of unbalanced loading