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Sonic Weighted Wireline System

Designed to complement the Sonic Dual Tube 6 in. (SDT60) system for sonic applications, the SDT60 Weighted Wireline (WWL) core drilling system from Geoprobe® adds yet another innovative tool to the Geoprobe® sonic tool box. While conventional wireline core drilling systems with various latching mechanisms have proven themselves in the coring world, their adaptation to sonic applications has not been without its challenges.

Jed Davis, lead engineer for the new system, said that conventional wireline core drilling systems utilize a mechanical latch to hold a core barrel in place inside of the core rod at the bottom of the tool string. “The tool string (core barrel and core rod) is advanced through the sampling interval,” Davis explained. “A release tool (overshot) is then lowered down to release the mechanical latch so the core barrel can be retracted.”

Weighted Wireline Core Drilling Innovation

The ‘secret’ behind the SDT60 Weighted Wireline design is ... Mass. The core barrel uses a simple weight system to hold it in place at the bottom of the tool string rather than a mechanical latch. In other words, the latching mechanism is replaced by a weight system.

Davis explained: “The weight system is modular in design and is comprised of 150 lb. weight segments that can be coupled together depending on sampling conditions. In most cases two, 150 lb. weight segments are sufficient to sample consolidated formations,” he said.

According to Davis, one critical design feature of this wireline core drilling system is the adaptation of the modular weight system to the Geoprobe® rod handler. “Once the weight system is initially put into the tool string, it’s not handled by us again until after the last sample has been retrieved from the borehole,” he said. During every sample extraction at ground surface, the weight system is easily handled by the rod handler and never by the driller or driller’s helper. “Coming from someone who spends their days outside working with tools, that’s a great thing!” Davis added.

Weighted Wireline Core Drilling Compatibility

The SDT60 Weighted Wireline system is designed to complement the standard SDT60 tooling. Davis recommends using standard SDT60 tooling with 2.25-in. center rods in softer, shallower formations. When deeper intervals (50 feet plus) or consolidated formations are encountered, “the weighted wireline core drilling system can easily be implemented without pulling the casing,” Davis added.

The SDT45 and SDT60 and the SDT45 and SDT60 Weighted Wireline systems are designed by and available exclusively through Geoprobe Systems®, and can be used under most sonic rigs.

Key Features

  • Wireline core drilling system designed to complement the Sonic Dual Tube 6 in. (SDT45) system for sonic applications
  • Core barrel uses a simple weight system to hold it in place at the bottom of the tool string
  • Much faster trip out times than traditional sonic sampling

Tooling Links

Parts

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6.0 in. Sonic Casing RHSL

120 in.

MN: 210979

6.0 in. Sonic Casing RHSL

60 in.

MN: 210648

6.0 in. Sonic Casing RHSL

24 in.

MN: 211174

6.0 in. Sonic Casing RHSL

18 in.

MN: 211277

6.0 in. Sonic Casing RHSL

12 in.

MN: 212350

6.0 in. Sonic Bit RHSL SDT60, Dome

6.49 in. OD, 4.10 in. ID

MN: 226396

6.0 in. Sonic Bit RHSL SDT60, Para

6.49 in. OD, 4.10 in. ID

MN: 215162

WWL Weight Head

MN: 220023

WWL Spearhead

MN: 220205

WWL Weight

150 lb.

MN: 220257

WWL Weight

300 lb.

MN: 223797

WWL Spring Cushion

Optional

MN: 223493

WWL Slip Coupler

2.25 in., Endless Thread

MN: 220739

WWL60 Spindle Connect Drive Head

Endless Thread

MN: 223253

DT60 Sample Sheath

60 in.

MN: 215042

DT60 Sample Sheath

12 in., Endless Thread

MN: 213140

SDT60 Sonic Core Catcher

Short

MN: 223224

DT60 Retainer

Endless Thread

MN: 213139

DT60 Wrench

MN: 208080

Rod Wiper Donut

6.0 in. (Weldment: 204387)

MN: 600624

Core Bags (SDT60, WWL60)

9 in. flat x 1000 ft.

MN: 700127

Thread Compound

1 Gallon

MN: 600729

6.0 in. Sonic Casing RHSL

120 in.

MN: 210979

6.0 in. Sonic Casing RHSL

60 in.

MN: 210648

6.0 in. Sonic Casing RHSL

24 in.

MN: 211174

6.0 in. Sonic Casing RHSL

18 in.

MN: 211277

6.0 in. Sonic Casing RHSL

12 in.

MN: 212350

6.0 in. Sonic Bit RHSL SDT60, Dome

6.49 in. OD, 4.10 in. ID

MN: 226396

6.0 in. Sonic Bit RHSL SDT60, Para

6.49 in. OD, 4.10 in. ID

MN: 215162

WWL Weight Head

MN: 220023

WWL Spearhead

MN: 220205

WWL Weight

150 lb.

MN: 220257

WWL Weight

300 lb.

MN: 223797

WWL Spring Cushion

Optional

MN: 223493

WWL Slip Coupler

2.25 in., Endless Thread

MN: 220739

WWL60 Spindle Connect Drive Head

Endless Thread

MN: 223253

DT60 Sample Sheath

60 in.

MN: 215042

DT60 Sample Sheath

12 in., Endless Thread

MN: 213140

SDT60 Sonic Core Catcher

Short

MN: 223224

DT60 Retainer

Endless Thread

MN: 213139

DT60 Wrench

MN: 208080

Rod Wiper Donut

6.0 in. (Weldment: 204387)

MN: 600624

Core Bags (SDT60, WWL60)

9 in. flat x 1000 ft.

MN: 700127

Thread Compound

1 Gallon

MN: 600729