Stop Collars are essential centralizer accessories used to secure centralizers and other downhole equipment at a fixed position on the casing or tubing. At Emson Oil Tools, we manufacture and export a wide range of API-compliant stop collars, including Slip-On Set Screw Stop Collars, Hinged Bolted Stop Collars, Hinged Spiral Nail Stop Collars, and Hinged Set Screw Stop Collars, each engineered for specific well conditions and casing sizes.
Our stop collars provide high holding force, prevent axial movement of centralizers, and are easy to install on-site. We also offer related products like Cable Wall Cleaners and Wire Scratchers to enhance mud removal and cement bonding.
As a trusted stop collar manufacturer and exporter in India, Emson Oil Tools delivers field-tested, cost-effective solutions for casing centralization in vertical, deviated, and horizontal wells.
Frequently Asked Questions (Faqs)
Q 1: What is a stop collar used for in oilfield operations?
A stop collar holds centralizers and other downhole tools in place on the casing during running and cementing.
Q 2: What types of stop collars are available at Emson Oil Tools?
We offer Slip-On Set Screw, Hinged Bolted, Hinged Spiral Nail, and Hinged Set Screw Stop Collars for various casing applications.
Q 3: What is the difference between slip-on and hinged stop collars?
Slip-on collars slide over the casing, while hinged collars can be clamped around the pipe, ideal for retrofitting.
Q 4: When should I use a hinged bolted stop collar?
Use hinged bolted collars when you need high holding force and easy installation on-site.
Q 5: What is a hinged spiral nail stop collar?
This collar uses nail-type gripping mechanisms and is ideal for moderate well conditions where quick, secure attachment is needed.
Q 6: How do cable wall cleaners and wire scratchers work with stop collars?
They help remove mud cake from the casing wall, improving cement bonding and zonal isolation.
Q 7: What is the holding force of Emson stop collars?
Our collars are tested to provide maximum axial load resistance, depending on the type and casing size.
Q 8: Are your stop collars API-compliant?
Yes, all Emson stop collars comply with API 10D standards for quality and performance.
Q 9: Can stop collars be reused?
Most stop collars are single-use, but some hinged models can be reinstalled if undamaged.
Q 10: Are stop collars suitable for deviated wells?
Yes, our collars are engineered for vertical, deviated, and horizontal wells.
Q 11: What casing sizes are supported by Emson stop collars?
We offer stop collars for casing sizes ranging from 4½” to 20″, with custom options available.
Q 12: How are set screw stop collars installed?
These are slid onto the casing and tightened using integrated set screws to lock in place.
Q 13: Do you offer fast delivery for stop collars?
Yes, we maintain stock and offer quick dispatch for standard sizes and types.
Q 14: Can stop collars be installed on-site?
Absolutely. Hinged and set screw designs allow field-friendly installation without special tools.
Q 15: Why choose Emson Oil Tools for stop collars?
We are India’s leading stop collar manufacturer and exporter, known for API quality, fast delivery, and custom engineering.