COLLAR FOR STAGE CEMENTING OF CASING STRING Russian patent published in 2000 - IPC

Abstract RU 2148150 C1

FIELD: well construction. SUBSTANCE: collar includes body with radial holes; closing cylindrical sleeve located inside body and provided with landing seat for separating plug; arresting device for locking the sleeve from rotation; and device for locking the sleeve in upper position and locking of its landing seat from rotation. Collar has plugs closing body radial holes relieving pressure. Arresting device for locking of sleeve from rotation is made in the form of eccentric cylindrical landing socket in body below radial holes and part of sleeve made eccentric and entering body landing socket in lower position. EFFECT: simplified design, higher reliability and facilitated manufacture of collar. 2 cl, 1 dwg

Similar patents RU2148150C1

Title	Year	Author	Number
SLEEVE FOR STEPPED CEMENTATION OF CASING STRINGS	1997	Safin V.A. Ermakov O.N. Fedorov V.A. Saitgareev R.Z. Kashapov S.A. Sagidullin I.A.	RU2132449C1
PACKER FOR STEPPED PRESSURE GROUTING OF CASING STRING	1999	Safin V.A. Vakula A.Ja. Ermakov O.N. Studenskij M.N.	RU2170332C2
PACKER EQUIPMENT	1999	Safin V.A. Khannanov S.N. Fedorov V.A. Kashapov S.A. Ermakov O.N. Novikov G.V.	RU2170331C2
CEMENTING DEVICE FOR WELLS	2018	Grab Aleksej Nikolaevich Bodnarchuk Aleksej Vladimirovich Mashkov Viktor Alekseevich	RU2696039C1
SLEEVE FOR STEP-BY-STEP CEMENTATION OF CASING STRINGS	1996	Asfandijarov R.T. Afridonov I.F. Rakhimkulov R.Sh. Alekseev V.A. Kljavin R.M.	RU2129207C1
DEVICE FOR STEPPED WELL CEMENTATION	2004	Asfandijarov I.R. Asfandijarov R.T. Alekseev V.A. Ishbulatov R.Sh.	RU2260675C1
CHECK VALVE FOR CASING STRING	2002	Safin V.A. Starov V.A. Ermakov O.N. Kashapov S.A.	RU2232871C2
DEVICE FOR STEPWISE CEMENTING OF TAIL PIECE	2007	Terent'Ev Sergej Vladimirovich Vanifat'Ev Vladimir Ivanovich Dudaladov Anatolij Konstantinovich Strykhar' Aleksandr Filippovich Elufer'Ev Jurij Mikhajlovich Volodin Aleksej Mikhajlovich Vlasov Aleksej Vasil'Evich	RU2344271C1
STRAINER OF OIL-WELL SUCKER-ROD PUMP	1998	Safin V.A. Takhautdinov Sh.F. Farkhutdinov R.G. Ermakov O.N. Novikov G.V.	RU2161696C2
DEVICE FOR STAGE CEMENTING OF CASING STRINGS	2015	Molodan Dmitrij Aleksandrovich Molodan Evgenij Aleksandrovich Chernov Roman Viktorovich Kutepov Roman Pavlovich Mashkov Viktor Alekseevich Parosochenko Sergej Anatolevich Pulja Jurij Aleksandrovich	RU2584428C1

RU 2 148 150 C1

Authors

Safin V.A.

Fedorov V.A.

Ermakov O.N.

Kashapov S.A.

Novikov G.V.

Dates

2000-04-27—Published

1998-05-26—Filed