Complete Zonal Isolation

Water and sand production from oil and gas wells characterized by low productivity and low reservoir pressure zones can prematurely kill wells; this also leads to a considerable loss in recoverable reserves. In many cases, mechanical techniques provide a viable solution for shutting off water production, although often, such solutions create a restriction inside the well, limiting access to deeper reservoir layers.

Oildata uses a range of highly cost-effective mechanical isolation devices to shut-off production from problem zones. These include temperature and pressure resistant retrievable and permanent plugs and packers (designed to fit various tubing and casing scenarios) used to shut-off unwanted production into the well bore. These plugs can be conveyed via wireline, coiled tubing or dump bailers and can be run off our Slickline Hybrid Actuating, Correlating Perforating (SHARP™) tool without incurring the extra costs of using a logging unit in non-rig operations.

Oildata’s mechanical water and gas shutoff systems are designed to provide cost-effective, rigless, through-tubing methods for downhole well profile control, utilizing primarily electric-line, or in some cases, combining electric-line with coil tubing.

Tools/ technologies deployed for these operations include;

Thru-Tubing Petal Basket Plug

The Through-tubing Petal basket Bridge Plug (TTBP) provide a cost effective means to install a permanent, but drillable plug without the use of a rig. TTBP is a vented plug with case-hardened slips, which lock the plug in the set depth. Its small running diameter will pass through most tubing restrictions and set in larger casing sizes.

The differential pressure rating is dependent on the height of the cement plug. The TTPB incorporates case hardened slips which lock in place once the plug is deployed unlike some other “air bag” through-tubing systems.

Features:

• Case hardened slips
• Expanding packer unit
• Vent valve for pressure equalization across plug
• Customized sizes are available
• E-line deployed.

Applications:

• Plug open perforations
• Plug off channels and cement voids behind casing
• Perform partial or total plugbacks in normal or gravel packed completions.

IMP™ (Inflatable Mechanical Plug)

IMP™ is deployed on electric-line or coiled tubing, through an existing completion tubing, to set in a larger size tubing or casing. The IMP consists of a rubber element, which is inflated with a downhole setting tool to achieve hydraulic isolation. Mechanical anchoring is achieved  with steel slats, which are embedded in the rubber element.

Although the IMP™ can withstand high differential pressures once set, permanent isolation is assured with conformance media such as high-strength cement or thermosetting plastic resin, which is usually dump-bailed or pumped on top of the plug. The IMP™ has various configurations, and can be retrieved in future with slick line or coiled tubing, if desired.

The TTPB and IMP™ can be configured as Straddle Packers for the isolation of intervals higher up in a well, allowing the selective production of deeper intervals in the same well. The annulus of the straddle packers is usually filled with cement or plastic, for reliable hydraulic isolation.

Applications:

• Plug open perforations
• Plug-off channels and cement voids behind casing
• Perform partial or total plug-backs of perforations in normal or gravel-packed completions
• Seal-off leaking bridge plugs or old cement plugs
• Straddle gas or water-producing zones higher up in the well, and produce deeper intervals

• Magna Range Plug

The Magna Range Plug is specially designed to pass through restricted ID tubing and set securely in the larger tubing or casing below. It has opposed, case-hardened slips located above and below a three piece nitrile rubber pack-off system. The pack-off elements are contained by rocker action metal back-up rings that eliminate extrusion of the elements at high temperatures and pressures. They are specially heat-treated making them hard outside for gripping and softer inside for easier milling.

• SEAL™

SEAL™ is a high expansion compression set plug intended to pass through restrictions and set in tubular with ID up to three times (3x) the running OD of the plug. It abates the deleterious effect of flow-cuts seals, an elastic creep, elastomeric stress relaxation and adverse effects of thermal transients related to shut-in cycles and zonal treatment cycles. The plug is configured to maintain hydraulic sealing function in compression set plugs and ensure an extended service life. It has more seal-to-casing engagement length than any other high-expansion plug with equal run-in diameter.

• Thru-Tubing Retrievable Bridge Plug

The Thru-tubing Retrievable Bridge Plug is a one trip installation and one-trip retrieval plug that can stand 5000psi differential pressure and 121⁰C. Bi-directional slips located below the packing system prevent well debris from gravitating behind the slips when set. It has a standard fishing neck and Short overall length (3 feet) and can be retrieved using pressure equalizing valve aids.

• Bridge Plugs:

We set Bridge Plugs to isolate unwanted zones during rig-based work-over operations. They can be used as a base of a freshly completed well or as a base to set whip stock when side-tracking a well and are drillable.

• They can be set on wireline pressure setting tool in any grade casing – including P-110. Bridge plugs are designed for extra high pressure and rapid drill-out (rated to 10,000psi at 350 (°F) and have small ODs for speed and safety while running. The Plugs stay set until gas pressure equalizes when drilling out.

• Packer Setting:

Oildata packers are set using electric line, with the aid of the Compact Setting Tool.

Oildata’s Compact Setting Tool is used for the setting:

• Bridge Plugs
• Packer and

The slow burning of a power charge produces high-pressure gas for setting bridge plugs, cement retainers and packers.

Benefits/Capabilities

• Pressure balanced top and bottom pistons

Eliminates presetting of plugs and patches, caused by high hydrostatic pressure 15,000psi pressure rating.