Downhole Tools and Spare Parts Catalog

1

Casing Scraper 4.1/2" -- Thread：2 3/8” API Reg BOX x 2 3/8” API PIN，Casing Weight：lb 13.5-16.6

Scraper body: 4140 alloy steel (quenched & tempered, hardness HRC 32-38); cutting edge: 4340 alloy steel (surface induction hardening, hardness HRC 58-62)

Cutting edge wear from scraping hard cement and formation gravel; thread deformation from downhole vibration and excessive torque; body corrosion from downhole brine

Inspect cutting edge sharpness and thread integrity before lowering; control drilling speed (≤30 rpm) and WOB (Weight on Bit, ≤5 kN) during scraping; flush casing with high-pressure drilling fluid while operating to remove debris; after use, clean and apply anti-rust oil to the body and thread; store in a dry, horizontal position

2

INSERT FOR and Dies Scraper size 4.1/2" tubing - 2 3/8” API Reg BOX x 2 3/8” API PIN / Casing Weight lb 13.5-16.6

Tungsten carbide insert + 4140 alloy steel die base; surface wear-resistant coating

Insert chipping or wear from impact with hard debris; die base thread wear from repeated replacement; corrosion from downhole fluid immersion

Replace inserts/dies when wear exceeds 2mm or chipping is found; use torque wrench for replacement (specified torque: 25-30 N·m); clean the installation groove thoroughly before assembly; soak spare inserts/dies in anti-rust oil during storage; avoid mixing with other size kits

3

Casing Scraper 4.1/2" -- Thread：API 2 3/8” Reg BOX x 2 3/8” API PIN，Casing Weight：lb 9.5–12.6

Same as Casing Scraper 4.1/2" (Part No.1); tailored for lighter casing weight

Same as above; additional risk of body deformation due to lighter casing wall thickness (avoid excessive lateral force)

Same as above; adjust WOB to 3-4 kN to avoid damaging thin casing walls; monitor downhole torque in real time (stop operation if torque exceeds 800 N·m)

4

INSERT FOR and Dies Scraper size 4.1/2" tubing - API 2 3/8” Reg BOX x 2 3/8” API PIN / Casing Weight lb 9.5–12.6

Same as Insert & Dies Scraper (Part No.1-2); matched to lighter casing scraper

Same as above

Same as above; ensure strict matching with the corresponding 4.1/2" scraper (light casing type) during replacement

5

Casing Scraper 5.1/2" -- Thread: API 2 3/8” Reg BOX x 2 3/8” PIN; Casing Weight：lb 15.5–23.0

Scraper body: 4340 alloy steel (quenched & tempered); cutting edge: tungsten carbide-tipped (TCT) for enhanced wear resistance

TCT insert detachment from high-impact scraping; thread wear from heavy-duty operation; body fatigue from repeated downhole lowering/raising

Inspect TCT insert bonding before use (no gaps or cracks allowed); operate at 25-30 rpm, WOB 5-6 kN; use centralizer to reduce lateral vibration; after use, check body for fatigue cracks (use magnetic particle inspection for key areas); store in a shockproof container

6

INSERT FOR and Dies Scraper size 5.1/2" tubing / API 2 3/8” Reg BOX x 2 3/8” API PIN Casing Weight lb 15.5–23.0

Tungsten carbide insert + 4340 alloy steel die base

Insert wear from scraping thick mud cake; die base deformation from excessive replacement torque; corrosion from downhole H2S/CO2

Replace inserts when wear exceeds 3mm; use anti-seize compound on die base threads during assembly; for H2S-containing wells, apply anti-corrosion coating to die base before use; store spare kits in a sealed, dry package

7

Casing Scraper 5.1/2" -- Thread: API 2 3/8” Reg BOX x 2 3/8” PIN; Casing Weight：lb 13.0–14.0

Same as Casing Scraper 5.1/2" (Part No.3); optimized for medium-light casing

Same as above; additional risk of cutting edge overload due to thinner casing wall (easy to accumulate debris)

Same as above; increase flushing frequency (every 50 meters of scraping) to avoid debris accumulation; reduce WOB to 4-5 kN for thin-walled casings

8

INSERT FOR and Dies Scraper size 5.1/2" tubing / API 2 3/8” Reg BOX x 2 3/8” API PIN Casing Weight lb 13.0–14.0

Same as Insert & Dies Scraper (Part No.3-2); matched to medium-light 5.1/2" scraper

Same as above

Same as above; strictly distinguish from heavy-duty 5.1/2" repair kits to avoid mismatching

9

Casing Scraper 6.5/8" / 7” -- Thread API 3 1/2” Reg BOX x 3 ½” PIN；Casing Weight：lb 20.0–32.0

Scraper body: 4340 alloy steel (forged, stress-relieved); cutting edge: TCT with wear-resistant carbide grains; thread: API 3 1/2” Reg (surface plated with nickel-phosphorus)

Cutting edge wear from large-diameter casing wall scraping; thread corrosion from nickel-phosphorus plating peeling; body deformation from high downhole pressure

Use high-torque drill string (≥1200 N·m) for matching; operate at 20-25 rpm, WOB 6-8 kN; inspect thread plating for peeling before use (touch up with anti-corrosion paint if needed); use multi-point centralizer to ensure uniform scraping; after use, perform ultrasonic inspection for internal body cracks

10

INSERT FOR and Dies Scraper size 6.5/8" / 7” tubing / API 3 1/2” Reg BOX x 3 ½” API PIN Casing Weight lb 20.0–32.0

Tungsten carbide insert (grain size 10-15 μm) + 4340 alloy steel die base; die base surface anti-corrosion treated

Insert wear from large-area scraping; die base thread stripping from improper torque; corrosion from long-term downhole storage

Replace inserts when wear exceeds 4mm; use torque wrench with torque limiter (max 35 N·m) for assembly; store spare kits in vacuum packaging to avoid moisture; label clearly for 6.5/8" and 7" compatibility

11

Casing Scraper 6.5/8" /7” -- Thread API 3 1/2” Reg BOX x 3 ½” PIN；Casing Weight：lb17.0

Same as Casing Scraper 6.5/8" /7” (Part No.5); adjusted for light casing weight

Same as above; additional risk of body vibration due to light casing weight (easy to cause uneven scraping)

Same as above; reduce drilling speed to 18-22 rpm; increase WOB stability (avoid sudden load changes); use shock absorber between scraper and drill string

12

INSERT FOR and Dies Scraper size 6 5/8” / 7” tubing / API 3 1/2” Reg BOX x 3 ½” API PIN Casing Weight lb 17.0

Same as Insert & Dies Scraper (Part No.5-2); matched to light 6.5/8" /7” scraper

Same as above

Same as above; ensure compatibility with light-weight scraper (do not use on heavy-duty 6.5/8" /7” casings)

13

Casing Scraper 7” -- Thread API 3 1/2” Reg BOX x 3 ½” PIN；Casing Weight：35.0-38.0. 14 A

Heavy-duty design: 4340 alloy steel body (double quenched); cutting edge: polycrystalline diamond compact (PDC) for ultra-high wear resistance; thread: API 3 1/2” Reg (heat-treated)

PDC insert chipping from impact with hard rock fragments; thread fatigue from heavy torque; body corrosion from high-temperature downhole fluid

Pre-inspect PDC inserts with a magnifying glass (no micro-chips allowed); operate at 15-20 rpm, WOB 8-10 kN; use high-temperature resistant lubricant on threads; monitor downhole temperature (max working temp ≤150℃); after use, clean inserts with high-pressure water and dry immediately

14

INSERT FOR and Dies Scraper size 7” tubing / API 3 1/2” Reg BOX x 3 ½” API PIN Casing Weight lb 35.0-38.0. 14 A

PDC insert + 4340 alloy steel die base (heat-treated); die base with positioning pins for accurate assembly

PDC insert detachment from improper assembly; die base positioning pin wear; corrosion from high-temperature brine

Replace inserts if PDC layer thickness is less than 2mm; ensure positioning pins are intact before assembly (replace pins if worn); use high-temperature anti-seize compound during installation; store spare kits in a temperature-controlled environment (0-30℃)

15

Casing Scraper 7” -- Thread API 3 1/2” Reg BOX x 3 ½” PIN；Casing Weight：17.0 – 32. 14 B

Same as Casing Scraper 7” (Part No.7); optimized for medium-light casing weight range

Same as above; additional risk of uneven scraping due to variable casing weight

Same as above; adjust WOB dynamically according to casing weight (5-8 kN); use real-time downhole monitoring tools to track scraping uniformity; stop and flush immediately if torque fluctuates by more than 20%

16

INSERT FOR and Dies Scraper size 7" tubing / API 3 1/2” Reg BOX x 3 ½” API PIN Casing Weight lb 17.0 – 32. 14 B

Same as Insert & Dies Scraper (Part No.7-2); matched to medium-light 7" scraper

Same as above

Same as above; label clearly with 14 B specification to avoid mixing with 14 A kits; check compatibility with casing weight range before use

17

Casing Scraper 9.5/8” -- Thread API 4 1/2” Reg BOX x 4 1/2 PIN；Casing Weight：29.3 – 47.0

Extra-heavy duty: 4340 alloy steel body (forged, normalized); cutting edge: TCT with thick carbide layer; thread: API 4 1/2” Reg (plated with chrome for wear resistance)

Cutting edge wear from large-diameter, heavy casing scraping; thread wear from high torque; body fatigue from repeated downhole cycles

Use extra-heavy drill string (torque capacity ≥2000 N·m); operate at 12-18 rpm, WOB 10-12 kN; use multi-stage centralizer system to reduce lateral stress; after 3 downhole cycles, perform magnetic particle inspection for body cracks; store horizontally on a dedicated rack to avoid bending

18

INSERT FOR Scraper size tubing / API 9 5/8” Reg BOX x 4 1/2” API PIN Casing Weight lb 29.3 – 47.0

Thick-layer TCT insert + 4340 alloy steel die base (forged); die base with reinforced thread

Insert wear from heavy scraping load; die base thread deformation from high torque; corrosion from downhole corrosive gases (H2S/CO2)

Replace inserts when carbide layer is worn down to 1mm; use torque wrench with digital display for assembly (specified torque: 40-45 N·m); for corrosive wells, apply anti-corrosion coating to die base and inserts; store spare kits in a corrosion-resistant container

1

B-12827

6 5/8" Basket Grapple

4140 alloy steel (quenched & tempered, hardness HRC 40-45); inner gripping surface with serrated teeth (surface carburized, hardness HRC 58-62)

Serrated tooth wear from gripping rough tubular surfaces; body fatigue from repeated elastic deformation; corrosion from downhole brine and H2S

Inspect serrated teeth for wear before use (replace if tooth height is less than 1mm); avoid gripping tubulars with sharp edges (de-burr first); after use, clean the grapple and apply anti-rust oil to the serrated surface; store in a dry environment, avoid stacking heavy objects on the grapple; for H2S wells, use anti-corrosion grease

2

B-12827

6 3/8" Basket Grapple

Same as 6 5/8" Basket Grapple; tailored for smaller tubular diameter

Same as above; additional risk of tooth overload due to smaller gripping area

Same as above; reduce gripping pressure by 10-15% compared to 6 5/8" grapple; ensure the grapple is fully seated on the tubular before applying pulling force

3

B-12827

6 1/4" Basket Grapple

Same as above; matched to 6 1/4" tubulars

Same as above

Same as above; strictly match the grapple size to the tubular diameter (no forced use on oversized tubulars)

4

B-12827

6" Basket Grapple

Same as above; optimized for 6" tubulars

Same as above

Same as above; use a gauge ring to verify grapple inner diameter before use (ensure 0.1-0.2mm interference fit with tubular)

5

B-12827

5" Basket Grapple

Same as above; designed for 5" tubulars

Same as above; additional risk of body deformation due to smaller outer diameter

Same as above; avoid excessive pulling force (max pulling force ≤80% of rated capacity); use a shock absorber to reduce sudden load impacts

6

B-12828

Basket Grapple Control

4340 alloy steel (quenched & tempered); control pin: 4140 alloy steel (heat-treated); seal ring: FKM (Viton) rubber

Control pin wear from repeated sliding; seal ring aging and cracking from high temperature; body corrosion from downhole fluids; thread wear from assembly/disassembly

Inspect control pin for wear and seal ring for cracks before use (replace if damaged); lubricate the control pin with high-temperature resistant grease before assembly; use torque wrench for assembly (specified torque: 20-25 N·m); after use, clean the control component and dry thoroughly; store spare parts with seal rings in vacuum packaging

1

5" Basket Grapple

4140 alloy steel (quenched & tempered, hardness HRC 38-43); inner gripping surface with diamond-like carbon (DLC) coating for enhanced wear resistance

DLC coating wear from gripping tubulars; body fatigue from repeated elastic deformation; corrosion from downhole moisture and chemicals; tooth chipping from impact with stuck tubulars

Inspect DLC coating for peeling before use (replace if coating area loss exceeds 10%); avoid sudden impact when lowering the overshot to the tubular; control pulling force within rated limits (refer to C-264 overshot manual); after use, clean the grapple with neutral detergent and dry; store in a dry, dust-free environment; apply anti-rust oil to non-coated surfaces

2

Basket Grapple Control

4340 alloy steel (forged); control valve core: 316 stainless steel; seal ring: NBR rubber (oil-resistant and high-temperature resistant)

Control valve core wear from fluid erosion; seal ring swelling deformation from incompatible drilling fluid; thread loosening from downhole vibration; body corrosion from downhole fluids

Calibrate the control component before use to ensure smooth opening/closing; use only drilling fluids compatible with NBR rubber; apply thread locker (Loctite 243) during assembly to prevent vibration-induced loosening; inspect for fluid leakage after assembly; store spare parts in a sealed container with desiccant