About This Item
- Full TextFull Text(subscription required)
- Pay-Per-View PurchasePay-Per-View
Purchase Options Explain
Share This Item
All the wells completed after 1979 were equipped with gas lift mandrels. The old wells completed previously, however, were not equipped with. A heavy work over to fit these old wells with gas lift mandrels and the annular safety devices needed for gas lift is not always economically feasible; it costs 1 to 2 million US.$.
The necessity to fit downhole safety valve (DHSV) for offshore fields has obliged to design gas-lift macaroni down hole safety valve (GL DHSV) which is operated from surface through a hydraulic control line. To obtain a larger production flow passage and better DHSV design, a gas injection through macaroni and production flow through annulus macaroni and tubing is preferable than the reverse.
Its performance in the fields has proven that using the GLM DHSV:
• The gas lift system involves less amount of gas compared to conventional gas lift in where the injected gas occupes the whole casing tubing annulus (above top packer). Moreover the casing will not be in contact with injected gas which is sometime corrosive.
Pay-Per-View Purchase Options
The article is available through a document delivery service. Explain these Purchase Options.
|Protected Document: $10|
|Internal PDF Document: $14|
|Open PDF Document: $24|