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Application

2002111060/03, 2002-04-24

(24)

Start date

2002-04-24

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Actual filing date

2002-04-24

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Published

2004-03-20

(72)

Inventor

Gabdullin R.G.Strakhov D.V.Zijatdinov R.Z.Fajzullin R.N.Zakiev F.M.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Im. V.D. Shashina

WELL COLLAR EQUIPMENT WITH ADDITIONAL CASING STRING Russian patent published in 2004 - IPC

Abstract RU 2225934 C2

FIELD: oil extracting industry. SUBSTANCE: well equipment with additional casing string has string head with lower an upper support flanges, and also has a steel insert. Technological passage is provided for gas leakage with locking means. String head has additional steel insert and a switcher. Between upper and lower support flanges intermediate support flange is mounted and connected to the switcher. Inner portion of free end of intermediate flange is threaded and has a diameter equal to outer diameter of additional casing string. Technological passage of intermediate flange and passage for gas leakage are made in upper support flange and connected to intertubular space between tubing pipes and additional casing string. EFFECT: equipment is small in size and has simplified construction. 3 dwg

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RU 2 225 934 C2

Authors

Gabdullin R.G.

Strakhov D.V.

Zijatdinov R.Z.

Fajzullin R.N.

Zakiev F.M.

Dates

2004-03-20—Published

2002-04-24—Filed

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