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1. In 1954 wellhead gas prices also came under government control.

2. There will not be much margin for resource or market rents at the well-head or in the electricity system.

3. Leaking oil and spilled water around the wellhead percolates through to the groundwater, carrying pollutants.

4. Securely connect the hydraulic connector to the wellhead.

5. Tree spray oil wells since the wellhead.

6. Lift BOP stack and replace wellhead connector AX ring.

7. The fixed conventional wellhead sealing units which are often used today have no displacement adjustment function.

8. Christmas trees and wellhead manifolds are the key facilities on offshore platforms.

9. Wellhead computer to ensure that manual or automatic device to enter the job status.

10. When the offset distance is smaller on the wellhead,(sentencedict.com) the layer velocity obtained with straight line and the refraction line is matched with that of actual formation velocity.

11. An instrument for nondestructive testingoil well tubing at wellhead is developed to reduce tubing failure.

12. The wellhead high pressure wireline control system can conduct close-in tests without bleeding off fluid and pressure, and keeping normal subsurface water injection.

13. Foreign natural gas prices are divided into a wellhead price, an urban gate station price, and a terminal user price.

14. A mini tension leg wellhead platform ( TLP ) has been proposed in this paper.

15. Then there is the cementing of the wellhead, a process which is necessarily tricky.

16. There are 163 wells located at the 6 wellhead platforms in QHD 32 - 6 oilfield.

17. In 2010, the wellhead price of natural gas averaged $4.25 a thousand cubic feet, about 40 percent below the average price from 2005 to 2009 and well under half the peak price.

18. The double barrel extraction wellhead assembly is mines thick oil's important installment, mainly by the landing head, the casing head and the production tree three parts is composed.

19. There are not automatic for wellhead in the origin design of a drilling rig.

20. Flange widely used wellhead equipment, oil trees and other well control equipment for connecting with.

21. It is composed of casing flange, casing cross joint, wellhead valves, tubing hanger,(Sentencedict.com ) tubing head cross joint and accessories.

22. This series of products mainly used in BOP, valves, blowout pipeline, the BOP tools, wellhead equipment and other products of hydraulic pressure test inspection.

23. Meanwhile, the main methods of developing underbalanced drilling are proposed in Sichuan which include drilling while blowing-out, controling wellhead back pressure and adjustment of drilling fl...

24. The reliabilities of casing head and gas - producing wellhead are related with the producing safety.

25. During the underbalanced drilling, once the drilling fluid density is determined, the difficult work left will be how to control the wellhead back pressure at the proper value at the proper time.

26. The utility model belongs to the torque testing device of the screw pump well on an oilfield pump recovery wellhead.

27. It is convenient for designer to accomplish the fast design of wellhead by using the database.

28. This paper introduces the procedure, mechanism and operation of wellhead tieback techniques and points out the problems necessary to be solved.

29. Back value:Value of oil or gas taking the price paid downstream for the product less the transportation and other costs incurred Between the wellhead and the downstream place of sale.

30. The unique solution, patented and certified by Russia's GOST standard, performs automatic multiphase measurement and quality monitoring of hydrocarbon flow coming out right from the wellhead.