Coring apparatus

Patent · Tue Apr 01 04:00:00 EDT 1975

OSTI ID:6947084

Young, J W; Firkins, R C; Ring, G; Tatum, Jr, J A

A formation coring apparatus is described which is suitable for coring relatively soft formations. The apparatus has a core barrel with an interior surface having porperties of similar to synthetic rubber. Two semitubular rigid portions are joined along at least one of the adjacent edges by a flexible material. A core catched has a number of flexible segments adapted to open while the core is being drilled and to close with the segments supporting the core thereabove to recover the core. A wireline tool carries the core barrel and the core catcher into position within the coring bit. A fishing neck is provided to engage a wire-line device for recovery. A latch retains the tool in position within the coring bit; a swivel allows the core barrel and catcher to remain stationary while the coring bit is rotated, and a check valve allows fluid flow from the top of the core barrel because of the entry of the core therein to flow out the tool while preventing inflow of fluids into the top of the tool. (15 claims)

• Assignee: Randolph Co.
• Patent Number(s): US 3874465
• OSTI ID: 6947084
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
CORING EQUIPMENT
DESIGN
DRILL BITS
DRILLING EQUIPMENT
EQUIPMENT
RESERVOIR ROCK
SAMPLERS
SOILS