Our Products: Casing Advancement - Overburden Drilling Systems
Casing Advancement - Overburden Drilling Systems – including complete tooling systems for Drive Drilling, Duplex Drilling, Double-Head Drilling (Rotary x Rotary) & Double-Head Drilling (Rotary x Percussive) are available from USExploration Equipment Company, originating at stocking points in Boyertown, Pennsylvania, Indianapolis, Indiana & Salt Lake City, Utah – USA.
When selecting the proper drill string to fit your down-hole application, keep the following in mind as a popular drilling method.
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| Casing Advancement System | Major Components | Hole Sizes | Casing Sizes & Cutting Face | Inner-Rod Sizes & Cutting Face | Catalog Page Reference |
|---|---|---|---|---|---|
| Double-Head Drilling (Rotary x Percussive) | Flushing Head | 55 - 56 | |||
| Double-Head Drilling (Rotary x Percussive) | Balance Rod | 54 | |||
| Double-Head Drilling (Rotary x Percussive) | Casing Flange & Ejection Bell | 57 | |||
| Double-Head Drilling (Rotary x Percussive) | Rotary Percussive Casing & Inner-Rods | 4-1/2-inch x RH (114.3mm) | 1-3/4-inch x LH (44.45mm) | 58 - 71 | |
| Double-Head Drilling (Rotary x Percussive) | Rotary Percussive Casing & Inner-Rods | 5-1/4-inch x RH (133mm) | 1-3/4-inch x LH (44.45mm) | 58 - 71 | |
| Double-Head Drilling (Rotary x Percussive) | Rotary Percussive Casing & Inner-Rods | 6-inch x RH (152.4mm) | 4-inch x LH (101.6mm) | 58 - 71 | |
| Double-Head Drilling (Rotary x Percussive) | Rotary Percussive Casing & Inner-Rods | 6-inch x RH (152.4mm) | 2-inch x LH (51mm) | 58 - 71 | |
| Double-Head Drilling (Rotary x Percussive) | Rotary Percussive Casing & Inner-Rods | 7-inch x RH (177.7mm) | 4-1/2-inch x LH (114.3mm) | 58 - 71 | |
| Double-Head Drilling (Rotary x Rotary) | Carbide Studded Ring Bit | Full-Face Percussive, DTH | 81 - 88 |
| Casing Advancement System | Major Components | Hole Sizes | Casing Sizes & Cutting Face | Inner-Rod Sizes & Cutting Face | Catalog Page Reference |
|---|---|---|---|---|---|
| Double-Head Drilling (Rotary x Rotary) | Flushing Head | 55 - 57 | |||
| Double-Head Drilling (Rotary x Rotary) | Shock Absorber | ||||
| Double-Head Drilling (Rotary x Rotary) | Balance Rod | 54 | |||
| Double-Head Drilling (Rotary x Rotary) | Casing Flange & Ejection Bell | 57 | |||
| Double-Head Drilling (Rotary x Rotary) | Rotary Percussive Casing & Inner-Rods | 4-1/4-inch x LH (108mm) | 3-inch x RH (76.1mm) | 58 - 71 | |
| Double-Head Drilling (Rotary x Rotary) | Rotary Percussive Casing & Inner-Rods | 4-1/2-inch (114.3mm) | 3-inch x RH (76.1mm) | 58 - 71 | |
| Double-Head Drilling (Rotary x Rotary) | Rotary Percussive Casing & Inner-Rods | 6-inch (152.4mm) | 4-inch x RH (101.6mm) | 58 - 71 | |
| Double-Head Drilling (Rotary x Rotary) | Rotary Percussive Casing & Inner-Rods | 7-inch (177.8mm) | 4-1/2-inch x RH (114.3mm) | 58 - 71 | |
| Double-Head Drilling (Rotary x Rotary) | Carbide Studded Ring Bit | Full-Face Percussive, DTH, Tri-Cone & Drag Bit | 81 - 88 |
| Casing Advancement System | Major Components | Hole Sizes | Casing Sizes & Cutting Face | Inner-Rod Sizes & Cutting Face | Catalog Page Reference |
|---|---|---|---|---|---|
| Duplex Drilling | Flushing Head | 52 - 54 | |||
| Duplex Drilling | Ejection Bell | 52 - 54 | |||
| Duplex Drilling | Rotary Percussive Casing & Inner-Rods | 3-1/2-inch (88.9mm) | 2-inch (51mm) | 58 - 71 | |
| Duplex Drilling | Rotary Percussive Casing & Inner-Rods | 4-inch (101.6mm) | 2-1/2-inch (63.5mm) | 58 - 71 | |
| Duplex Drilling | Rotary Percussive Casing & Inner-Rods | 4-1/2-inch (114.3mm) | 3-inch (76.1mm) | 58 - 71 | |
| Duplex Drilling | Rotary Percussive Casing & Inner-Rods | 5-1/4-inch (133mm) | 3-1/2-inch (88.9mm) | 58 - 71 | |
| Duplex Drilling | Rotary Percussive Casing & Inner-Rods | 6-inch (152.4mm) | 4-inch (101.6mm) | 58 - 71 | |
| Duplex Drilling | Carbide Studded Ring Bit | Full-Face Percussive or DTH Bit | 81 - 88 |
| Casing Advancement System | Major Components | Hole Sizes | Casing Sizes & Cutting Face | Inner-Rod Sizes & Cutting Face | Catalog Page Reference |
|---|---|---|---|---|---|
| Drive Drilling | Flushing Head | 50 - 51 | |||
| Drive Drilling | Rotary Percussive Casing | 3-1/2-inch (88.9mm) | 3-1/2-inch (88.9mm) | 58 - 71 | |
| Drive Drilling | Rotary Percussive Casing | 4-inch (101.6mm) | 4-inch (101.6mm) | 58 - 71 | |
| Drive Drilling | Rotary Percussive Casing | 4-1/2-inch (114.3mm) | 4-1/2-inch (114.3mm) | 58 - 71 | |
| Drive Drilling | Rotary Percussive Casing | 5-1/4-inch (133mm) | 5-1/4-inch (133mm) | 58 - 71 | |
| Drive Drilling | Rotary Percussive Casing | 6-inch (152.4mm) | 6-inch (152.4mm) | 58 - 71 | |
| Drive Drilling | Expendable Bit Holder | 92 | |||
| Drive Drilling | Expendable Bit | 90 - 91 |
Double-Head Drilling (Rotary x Percussive) – with a dual top-head that incorporates a rotation unit for outer casing & a drifter for the inner-rod; this technique utilizes (air, water or mud) internal flushing, a rotary style (RH) outer casing (with inertia welded) tool joints, API style (larger) drill pipe, inertia welded (smaller) drill rods or percussive style (LH) inner-rods that is advanced independently from the outer casing, that is also equipped with a tungsten carbide or diamond impregnated (weld-on) ring bit (casing shoe or crown) & full-face DTH or cross-chopping for the (percussive) action on the inner-rods.
This technique is best suited for basically all formations that require a fairly straight bore hole, where down-hole conditions can vary widely, that might require sealing off against pressurized groundwater & most importantly where penetration rate (speed) is critical.
Refer to pages 44-48 in Boart Longyear’s Delta Tools Catalog.
Double-Head Drilling (Rotary x Rotary) – with a dual-top-head; this technique utilizes (air, water or mud) internal flushing, a rotary style (LH) outer casing (with inertia welded) tool joints, API style drill pipe, solid stem augers, or multi-use flush joint casing as a (RH) inner-rod that is advanced independently from the outer casing, that again is equipped with a tungsten carbide (weld-on) ring bit (casing shoe or crown) & DTH, Drag (Chevron), Tri-Cone, DP, FishTail, 5-T or BullDog style bit(s) for the inner-rod or augers.
This technique is best suited for basically all formations that require a fairly straight bore hole, where down-hole conditions can vary widely & might also require sealing off against pressurized groundwater.
Refer to pages 38-42 in Boart Longyear’s Delta Tools Catalog.
Duplex Drilling – with a single drifter as a top-head; this technique utilizes (air or water) internal flushing (usually) a rotary/ percussive style (LH) outer casing (with a nipple style or inertia welded) tool joint, an inertia welded or percussive style (RH) inner-rod that can be advanced with or without the outer casing, with a tungsten carbide (weld-on) ring bit (casing shoe or crown) & a full-face DTH style bit for the (RH) inner-rods.
Best suited for larger gravels, sand, silt, some consolidated formations, limestone & limited boulder types.
Refer to pages 32-36 in Boart Longyear’s Delta Tools Catalog.
Drive Drilling – with a single drifter as a top-head; this technique utilizes no (air or water) flushing, a rotary/ percussive style casing (with a nipple style or inertia welded) tool joint & an expendable style bit (left in the bore hole after reaching TD).
Best suited for gravels, sand, limited boulders & easily displaced overburden formations.
Refer to pages 26-30 in Boart Longyear’s Delta Tools Catalog.
133mm casing featuring high-grade (annealed 36Mn4) mid-body, oversized wall thickness on tool joints, that are inertia welded, not plasma or stick welded to the axle. A wide variety of expendable bits, points & weld on casing shoes are available, depending on your unique drilling conditions
133mm casing with single joint (non-nipple style) x triple-start x left hand (LH) x heat treated tool joints & (spanner SF120) “wrench” flats