Q: How long has WWT provided Non-Rotating Protectors?
- A: Since 1989, WWT International (formerly known as Western Well Tool and commonly referred to as WWT) has made numerous improvements over the years to increase both product performance and service provided.
Q: Where have WWT Non-Protectors™ been used?
- A: In thousands of challenging wells worldwide in both cased and open-hole oil and gas and geothermal wells.
Q: Can we purchase WWT Non-Rotating Protectors?
- A: No, WWT Non-Rotating Protectors are a tool used as part of our service to reduce drillstring friction and improve drilling performance. We rent our equipment and supply service technicians.
Q: Is a Service Technician required?
- A: Yes, our experienced service technicians are required on site for the duration of the application install, monitor, inspect, and remove the Protectors to ensure that optimal benefits are received and risks reduced.
Q: How long does it take to install one?
- A: Approximately 45-60 seconds per assembly, or 1.15 - 1.25 minutes from slips in to slips out when installing one assembly per joint.
Q: Can WWT Protectors be installed off line?
- A: Yes, RIH is typically more time efficient, but we can install in the pipe yard, on the pipe rack, or however else to best utilize rig time.
Q: Do WWT Protectors need to be removed each trip?
- A: No, manipulation of the stands with installed protectors during POOH and RIH allows the protectors to provide benefit in the critical areas of the wellbore for each bit run without having to spend time removing assemblies each trip.
Q: Are there any special make-up tools required?
- A: WWT International group of companies supplies all the required specialized tools for installation.
Q: What is the max side load?
- A: 2,200-3,500 lbs/jt for an individual assembly depending on the drillpipe size. Higher side loads can be handled by adding an additional WWT NRP to share the loading.
Q: What about interference with BOP rams?
- A: As WWT Protectors are placed on the drill pipe OD, they are able to be positioned to accommodate clearance of BOP rams.
Q: Do WWT Protectors come off the pipe?
- A: WWT Protectors can be torn off the pipe if they experience side loading greater than the design limit, encounter an obstruction, or are not run per the WWT International group of companies' recommendation.
Q: What are the consequences of lost WWT Protectors?
- A: Sleeve material will normally float to the surface and the collars are drillable. No well has ever had to be side tracked due to WWT NRP debris.
Q: What effect do the assemblies have on ECD?
- A: The sleeve is just larger than the tool joint and is fluted. Typically we see very little effect on ECD. We provide an analysis to reflect pressure drop.
Q: Can you use WWT NRPs in all types of drilling fluid?
- A: Yes, components are compatible with most water, synthetic and oil based drilling fluids as well as most completion fluids. We can test out any fluid in our R&D facility.
Q: Can WWT NRPs strip through the rotating head?
- A: WWT Protectors have stripped through numerous rotating heads.
Q: How about stripping WWT NRPs through an engaged annular BOP?
- A: SC Collars can be utilized to increase the holding force and have successfully held position when being ran through an engaged annular preventer during testing.
Q: Do the Non-Rotating Sleeves cause wear on the drill pipe?
- A: Fluid bearing and rubber liner minimize contact between the sleeve ID and the pipe body. This is periodically inspected by our service technicians.
Q: When should we consider WWT NRPs?
- A: Any well where there are concerns with casing wear, torque, drag, riser wear, buckling. Normally when side forces exceed 1,500 lbs/jt.
Q: Where on the drillpipe are WWT NRPs typically installed?
- A: WWT NRPs are typically installed right above the tool joint upset (pin end) depending on the spacing allowed by the rig's make-up equipment or BOP spacing requirements.
Q: How many WWT NRPs do we need?
- A: We do an analysis for every well to determine contact forces. The contact force determines where in the well the protectors will provide the most benefit along with the quantity required per joint. If contact forces exceed that of one assembly, an additional assembly is to be installed to share the loading.
Q: How quickly can we get an analysis?
- A: Usually within 24 hours, but within 6 hours or sooner if urgent.
Q: How much does the analysis cost?
- A: No cost or obligation
Q: What does the analysis reflect?
- A: Contact force value, dogleg severity, critical contact location(s), torque/drag values, wear prediction, ECD and the difference NRP’ will make to the reduction of such values for cost/benefit analysis.
Q: Are there inventories in my operating area?
- A: Territory specific. Inventories are located in most active areas of the world.
Q: Why did Western Well Tool change its name to WWT International?
- A: Western Well Tool Inc. officially changed its name to WWT International to reflect its expanding role as an oil and gas specialty products and services company, as well as its increasing global representation and offices. The ownership and the way the company does business remain unchanged.