Address:
For more 20 3/4”Annular BOPinformation, please contact us. We will provide professional answers.
Room 502, Unit 2, Building 33, Shilaoren, Laoshan District, Qingdao, Shandong, China
Business Type:
Trading Company
Business Range:
Manufacturing & Processing Machinery, Metallurgy, Mineral & Energy, Service
Contact us to discuss your requirements of blowout prevention system. Our experienced sales team can help you identify the options that best suit your needs.
Company Introduction:
Qingdao O& G International Trading Co., Ltd. Specializes in marketing of oilfield drilling equipment and complete drilling rig packages. We supply the full line of AC and SCR drive rigs, conventional and fast moving rigs (truck-mounted, trailer-mounted and skidding type rigs), drilling equipment, rig accessories and parts.
O& G provides a full line of API certified drilling rig components and drilling equipments. These include drawworks, mud pumps, top drives, rotary tables, traveling system, hydraulic and manual handing tools, BOP′s, manifold and closing units, mud system and solid control equipment. We also provide rig accessories (air hoists, wireline units, etc. ) and mud pump parts.
1. Mud Pumps, Plunger Pumps and Parts
O& G specializes in supplying quality mud pumps, plunger pumps and expendable parts.
The made-in-China mud pumps and plunger pumps meet the requirements of the same manufacturing technique and quality level as those of mud pumps made by OEM. They feature advanced structural design, reliable use, easy maintenance and compact occupied area. Now, F series mud pumps (from F-500 to F-1600), PZ-9 mud pumps, PAH-275 mud pumps, HT400 plunger pumps, W600 plunger pumps have been produced and sold to many abroad oilfields. O& G′s export-orientated mud pump parts, including liners, pistons, piston inserts, valve inserts, oil seals, rod packing, fluid ends, and also power ends, such as crank shaft, pinion gear and bull gear, cross head, belt wheel etc...All of them meet or exceed API standards and have been exported to USA, Canada, Middle East, Poland, Romania and many other countries.
2. Drilling Rig Packages
O& G specializes in supplying quality mechanical, DC or AC drilling rig packages including truck or trailer mounted rigs, skid mounted rigs, XJ250, XJ350, XJ450, XJ550, XJ650, XJ750, ZJ20, ZJ30, ZJ40, ZJ50, ZJ70, etc...We can supply different types of drilling rigs such as sling-shot type, swing up type, box on box type, telescoping trailer mounted type, cantilever type and bootstrap type. Our quality and reliable drilling rigs drill up to 7000 meters and are suitable for different applications for land shallow water and offshore. Our drilling rigs conform to API specifications and are allowed to use API monogram.
3. Drilling Equipments
O& G specializes in supplying quality drilling equipments including Drawworks, Crown blocks, Traveling blocks, Hooks, Swivels, Rotary tables, Disc brakes, API drilling lines, Drilling motors, Top drives, etc. All the drilling equipments we supply conform to API standard and have been exported to many countries such as USA, Canada, Middle East, India, Malaysia and are high praised by the customers.
4. Well Control Equipments
O& G specializes in supplying quality well control equipments including BOP stacks, choke and kill manifolds, BOP handling systems and BOP closing Koomey control systems. The BOP stacks we supply are either metric or imperial. Consumable parts of the BOP are interchangeable with American OEM parts.
5. Handling Tools
O& G specializes in supplying all kinds of quality handling tools, including drill pipe tongs (hydraulic or manual), elevators, Hydraulic Cathead, Pneumatic spinning wrenches, Kelly spinners, Roller kelly bushing, Master bushing, DDZ type Drill pipe elevators, Side door casing elevators, Safety clamps, Rotary slips, Drill collar slips, etc. The handling tools we supply conform to API standard and are world wide used.
6. Rig Accessories:
O& G specializes in supplying rig accessories including wireline unit, air hoist, hydraulic hoist etc. The rig accessories we supply comform to API standard and are world wide used.
zon] and double ‘V’ blades—rams with double ‘V’ blades appear to have 15% to 20% lower shear forces than single blade designs. The data received primarily included shear rams having both blades ‘V’ shaped.4 The two data points from shear rams that did not have both blades ‘V’ shaped [as was the case on the Deepwater Horizon] were excluded from statistical consideration” (West Engineering Services 2004, 4-2).
When a signal is sent from the drilling rig to the BOP (on the seafloor) to execute a command, the BOP sends a message back that the signal has been received. However, there are no devices to send a signal that any command has been executed, such as pressure or displacement sensors confirming that hydraulics were actuated or that rams have moved or that pipe has been cut, nor are there any flow sensors measuring whether the well has been sealed.
Additional conclusions can be drawn from the two West Engineering studies. Clearly, the operating success of the BSR was recognized to be much less than 100 percent years before the Macondo well blowout. It appears to be no better than 50 percent, on the basis of the results of the Mini Shear Study described above. This success ratio is inconsistent with the expectations placed on the BOP system as a fail-safe mechanism to close an out-of-control well. If well pressure is assumed to be contained by the annular preventer (assume the maximum rating of the annular preventer to represent this pressure) and if the well pressure differential across the BOP is assumed to be much larger than the hydrostatic pressure exerted by the drilling mud (as was the case in the Macondo well by at least two times), the shear success percentage demonstrated by the first study would decrease even further.
At no time is the drill pipe placed in compression during the tests discussed in the first West Engineering study. In fact, care is taken “to prevent excessive bending of the pipe” (API Specification 16A, Part B4.3.d [1997] (as cited in West Engineering Services 2004, 9-1)). The pipe section below the shear ram is not confined and is free to fall out of the shearing ram during operation. In contrast to this ideal test situation, if the pipe is in compression it may buckle as soon as the ram begins to shear it. The shear ram may not be able to cut the pipe in this condition. If the pipe is cut but cannot move out of the area of the closing rams, the rams may not seal. Sealing was not even considered in the study.
The careful housekeeping necessary to ensure that the correct type of pipe is in the correct position in the BOP stack may be difficult to accomplish in a well control emergency, further decreasing the chance that the shear rams will function correctly. Even with the addition of a CSR, the ability to seal the well is questionable if the pipe either above or below the CSR must be moved out of the way after the CSR cuts the pipe to allow one or more BSRs to seal the well. In a well control emergency there is no assurance, or even a likelihood, that the pipe can be moved at the appropriate moment to allow the BSR to seal. And obvi-
____________________
Want more information on types of blowout preventer? Feel free to contact us.