Casing patch designed for high pressures
This new 15,000 psi casing patch is designed to simply, quickly, and economically repair damaged casing in high-pressure environments.
The patch (patent application pending) can seal internal and external pressure without restricting the bore’s internal diameter. Once installed, the patch restores integrity to the damaged casing and becomes a permanent part of the string.
Major load bearing components are manufactured of alloy steel. A top sub, bowl, and cut-lipped guide, plus optional extensions make up the outer components of the assembly. Internal components include a basket grapple control, basket grapple, four Type L high-pressure packer sets, and a packer protector with shear pins. A longer-than-standard basket grapple engages more of the casing to provide additional pull load. High-pressure packers are made of a blend of synthetic rubber and Kevlar material that is compatible for service with most drilling and completion fluids, and is resistant to gas invasion and abrasion. For maximum top-to-bottom patch integrity, two inverted packers provide sealing in both directions. The packers are fully covered by a packer protector to guard them against damage when engaging the casing into the patch. The packer protector is secured by shear pins that break when subjected to the excess stress caused when the casing comes into contact with the packer protector.
Source: Logan Oil Tools Inc., 11027 Lucerne St., Houston, TX 77016.
New oil field water-cooled clutches, brakes
New AquaMaKKs water-cooled clutches and brakes from Wichita Clutch USA, Wichita Falls, Tex., are air, hydraulic, or spring-set actuated and feature heat-dissipating copper wear plates and nonmetallic composite water jackets that are optimized for heavy-duty continuous slip tension applications.
Available in sizes of 19-36 in. (friction lining OD), the units provide as much as 3,400 hp heat absorption.
The family of clutches and brakes is suited for tension control in traditional style drawworks control systems, for integration into electronic drilling systems, and for accurate tension control of positioning and mooring winches that require high heat dissipation.
Designed with a series of alternating friction disks and water jackets, AquaMaKKs transmits torque by applying axial force from the pneumatic, hydraulic, or spring-set actuator, which provides accurate torque control for constant tensioning, the supplier points out.
Source: Altra Industrial Motion, 300 Granite St., Suite 201, Braintree, MA 02184.