Overshot price manufacturers

When purchasing an overshot, you must prioritize API 7-1 certification to ensure the tool meets international oilfield standards. Key technical parameters include the Maximum Catch Size, Outer Diameter (OD) to ensure it fits within the wellbore casing, and the Tensile Strength required to pull the stuck fish. You should also specify the type of grapple needed—Basket Grapples for smaller diameter fish or Spiral Grapples for larger diameters—and ensure the Top Sub connection matches your existing drill string threads (e.g., API Regular or IF).

For high-pressure, high-temperature (HPHT) environments, verify that the sealing elements (Pack-off rubbers) are made of high-grade elastomers like Viton or Nitrile to prevent leakage. If the well contains corrosive elements like H2S, you must request NACE MR0175/ISO 15156 compliance to ensure the steel is resistant to sulfide stress cracking. Additionally, confirm if the tool is a Releasing Type, which allows for disengagement if the fish cannot be pulled.

Demand a Material Test Report (MTR) to verify the chemical composition and heat treatment of the alloy steel (typically 4140 or 4340). You should also require Non-Destructive Testing (NDT), specifically Magnetic Particle Inspection (MPI) or Ultrasonic Testing (UT), to check for surface and internal cracks in the bowl and grapples. A Load Test Report is also recommended to confirm the tool can handle its rated pulling capacity.

Utilize Third-Party Inspection (TPI) services such as SGS, BV, or Intertek to conduct a pre-shipment inspection at the factory. For secure transactions, use the Secured Trading services on Made-in-China.com, which ensure that payment is only released to the supplier once you confirm the shipping documents or inspection reports meet your requirements.

Overshots are heavy and dense; therefore, Sea Freight (LCL or FCL) is the most economical method. Ensure the supplier uses seaworthy export packaging, such as reinforced wooden crates with anti-rust oil coating and VCI (Volatile Corrosion Inhibitor) plastic wrapping to prevent saltwater corrosion during transit. Clearly define Incoterms (e.g., FOB or CIF) to establish who is responsible for insurance and local port charges.

For orders exceeding 5-10 units, aim for a volume discount of 10-15%. Since these tools often require precision machining, lead times can range from 20 to 45 days. Negotiate a staggered payment term (e.g., 30% deposit, 70% against Bill of Lading) and include a liquidated damages clause in the contract for significant delivery delays to protect your project timeline.