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API Annular Blowout Preventer (Annular BOP)
Standard:API 6A &16AApplication:well drillingMaterial:forged steel/cast steel
Annular Blowout Preventer (Annular BOP) is important equipment widely used in onshore and offshore drilling. JEFA provides three types of annular BOP: bolted-cover, wedged-cover, latched-cover type.
All types of annular BOP are strictly manufactured as per API Spec 16A, and can be used to replace Shaffer annular BOP or Hydril annular BOP.
In case of blowout and well-sealing is needed, high pressure oil coming from control system enters the bottom closing chamber from bottom inlet to push piston moving upward. The movement of piston forces rubber core to move upward along the sphere surface, then supporting ribs get closer to push the internal rubber moving towards the wellhead center to fulfill the function of sealing drill equipment or the wellhead. When unlocking the seal is needed, hydraulic oil pushes the piston moving downward and the rubber core will reset to its original position under its elastic force.
Structure Characteristics
1- The connection between top cap and housing, top and bottom ends adopt flanges
2- Semisphere rubber core has many advantages, such as not easy folding back, bigvolume of rubber storage. Under the well pressure, the piston pushes the rubber core upward to form a funnel shape. The funnel effect of rubber
core increases its sealing performance and life span.
3- Characteristics of the sealing structure include:
(1) The BOP has three important sealing positions: piston external surface seal, piston internal surface seal and mud blocking ring seal.
(2) Radial direction cross section of the piston comes of the shape "Z", which makes the piston have short stroke length, low height and big diameter.
(3) There are two wear-rings stick to the external surface of the piston and a wear-ring stick to the internal surface of the housing. The structure prevents metal to metal contact and protects piston and housing.
| Standard: | API Spec 6A&16A |
| Working pressure: | 2000psi-10000psi(14 Mpa-70Mpa) |
| Bore size: | 7 1/16"-13 5/8" |
| Top &bottom connection: | Flanged,studded |
Shanghai Jefa Machinery Co.,Ltd specialize in API 6A &16A products as below:
1) Wellheads (casing/tubing head, crosses ,flange adapter,etc)2) Valve (FC/FLS gate valve, mud gate valve, chock valve, etc)3) Fitting(union, manifold,elbows).4)Bop(Annular/ram)API Annular Blowout Preventer (Annular BOP)