ONE-CONE DRILL BIT

申请公布号：RU2153568(C2)

申请号：RU19980118702

申请日期：1998.10.12

申请公布日期：2000.07.27

申请人：

PREDPRIJATIE "ASTRAKHAN'GAZPROM" RAO "GAZPROM"

发明人：GORBUNOV A.N.

分类号：E21B10/08;(IPC1-7):E21B10/08

主分类号：E21B10/08

摘要：rock-cutting tools. SUBSTANCE: one-cone drill bit is used in construction of oil and gas wells and in drilling of geological exploration wells. One-cone drill bit for drilling well below casing string consists of body with fastening thread and water course, ellipsoid con with rock-cutting members in it. Fixing device is made in the form of spring-loaded pin, collar and water course. In this case, body water course is communicated with water course of fixing device for building up of higher pressure exerted on collar as compared with pressure behind cone, lifting of pin and releasing cone fixation in supply of mud to water courses. With use of the one-cone drill bit, well is constructed at one stage without use of hydraulic expander to reduce work volume and expenditures and to save material and technical means and to reduce cost of drilling by a factor of two as compared with known one-cone drill bit. EFFECT: improved design. 1 dwg

RUOTISMO EPICICLOIDALE PERFEZIONATO, PARTICOLARMENTE ADATTO PER INVERTIRE IL MOTO DI UN MOTORE IRREVERSIBILE

PROCEDIMENTO PER LA PRODUZIONE DI CARBONE ATTIVO

MULTISPINDLE SYNCHRONOUS DRIVE UNIT AND GEAR CUTTING MACHINE

ROBOT ARM DRIVE APPARATUS OF INDUSTRIAL ROBOT

HYDROXYLATED METABOLITES AND DERIVATIVES OF DOXAZOSIN AS ANTI-ATHEROSCLEROSIS AGENTS

COLLAPSIBLE SAW HORSE

KAOPA FOER MONTERING AV ELEKTRISKA ELLER ELEKTRONISKA KONSTRUKTIONSDELAROCH -GRUPPER

Sähköinen impedanssianturi fysikaalisten suureiden, etenkin lämpötilan mittaamiseksi ja menetelmä kyseisen anturin valmistamiseksi

DRUM CATHODE FOR USE IN THE PRODUCTION OF METAL FOILS AND A METHOD OF PRODUCING THE SAME

POLYMERIC THERMOPLASTIC COMPOSITION BASED ON POLYPHENYLENE ETHER AND AN IMPACT-RESISTANT VINYL AROMATIC COPOLYMER

2-SUBSTITUTED TERTIARY CARBINOL DERIVATIVES OF 1,5-IMINOSUGARS

Process for High Purity Tetrabromobisphenol-A

Träningsanordning för badmintonspel

Montering av axiell strömningsmaskin

STRUTTURA DI SUPPORTO, PER L'ESECUZIONE DI PAVIMENTI SOSPESI, IMPALCATI E SIMILI

PREFABRICATED SLEEVE FOR THERMAL INSULATION OF PIPES AND PRODUCTION MOULD THEREFORE

PROCEDIMENTO PER LA PREPARAZIONE IN DISCONTINUO DI ALCHILARIL CARBONATI

LIFTING STRIP

ARC WELDING METHOD AND APPARATUS

DISPOSITIVO REGOLATORE CENTRIFUGO PER L'APERTURA E LA CHIUSURA DELLA SERRANDA DI UN GRUPPO ELETTROVENTILATORE ASSIALE E GRUPPO ELETTROVENTILATORE UTILIZZANTE TALE DISPOSITIVO