Downhole Artificial Lift Accessories

NHA hydraulic tubing anchor

The NHA Hydraulic Tubing Anchor is a hydraulic set, retrievable anchor catcher designed to hold the tubing string in compression or tension. The NHA does not require tubing manipulation to set or retrieve. To set, pressure is applied to a temporary plug below the anchor. After setting, bi-directional slips anchor the tubing to prevent tubing movement during rod pumping and to prevent the tubing from falling should the tubing part.

The compact design is ideally suited for doglegs and highly deviated wells. The anchor is available in both wicker and carbide slip configuration. The NHA is released by straight-pull to shear releasing pins.

Features

• Hydraulic set
• Adjustable straight pull shear release
• Short overall length is suitable for highly deviated wells
• Premium threads available upon request

Benefits

• No tubing manipulation required to set or release
• Can be landed in tension or compression
• Increases pump efficiency

NQT quarter-turn tubing anchor

The NQT quarter turn tubing anchor features quarter turn set and release with same robust slip system featured on the NASI-X packer. The anchor may be landed in tension, compression or neutral position. The anchor includes an adjustable safety straight pull shear release. Special cone design maintains slip engagement through load reciprocation, preventing the anchor from working loose.

The compact design is ideally suited for doglegs and highly deviated wells. The anchor is available in both wicker and carbide slip configuration. Additional sizes available on request.

Features

• Quarter turn set and release
• Adjustable straight pull safety release
• Short overall length is suitable for highly deviated wells

Benefits

• Can be set shallow by pulling tension after initial slip engagement
• Can be landed in tension, compression or neutral position
• Increases pump efficiency.

NAC-1 tubing anchor catcher

The NAC-1 tubing anchor catcher is a rotationally activated tool used to prevent vertical movement of the tubing. The drag block design provides better torque resistance than older drag spring design. When installed with the proper amount of tension, this anchor prevents tubing movement during rod pump operations.

The NAC-1 sets with left-hand rotation and releases with right-hand rotation. The anchor incorporates a field adjustable emergency shear release system. To shear release the anchor, straight pull will shear the shear pins at a pre-determined shear value.

Features

• Drag block design provides better torque resistance than drag springs
• Adjustable straight pull shear release
• Standard left-hand rotation to set, right-hand rotation to release
• May be run above or below a rod pump

Benefits

• Prevents tubing movement for better pump efficiency
• Prevents tubing dropping to bottom should the tubing part
• Drag blocks supported with Inconel springs for long service

Operation

Install the NAC-1 in the tubing string just above or below the pump for best results. Run to setting depth and rotate the tubing to the left at the anchor. The number of turns required will depend on casing weight, once set the tubing will torque up.

To ensure the anchor is set, hold left-hand torque and set down on the anchor, 10-15,000-lb. Pick-up and set down several times to ensure set of the anchor. To release, lower the tubing to release tension, rotate to the right while working the tubing up and down slightly. Should the anchor not release, straight pull on the tubing above shear value of the release pins will shear the pins and release the anchor.