Quite often during non-rig well intervention operations it is necessary or desired to install long sections of tubulars into the well, such as sand screens and similar tubular assemblies. This necessity creates many challenges for operators and service companies with regards to maintaining well control during these installations.
As most non-rig well interventions involve the use of coil tubing or wireline operations intervening through the existing production tubing on live wells, a means by which to install these long assemblies into the well while maintaining multiple barriers of well control becomes a necessity. Common practice has been to lubricate the assembly into the well by using either a wireline lubricator during wireline interventions or a riser assembly when coiled tubing is used for conveyance. Both systems limit the overall length of assembly that can be installed in the well. The limitation of overall lengths of these assemblies are relative to how much length of riser or lubricator that can be rigged up or installed on top of the well Christmas tree. Most well locations limit the total length of either lubricator or riser to < 100’.
During installation of TTS’s Thru Tubing Gravel Pack Systems, it is a common requirement to install well tubular assemblies >200’ in overall length, well outside the limits of conventional lubricator and riser systems used during coil tubing and wireline well interventions.
As a result, TTS has developed several systems/techniques along with proprietary tooling in order to accommodate this need. All these systems allow for the unlimited overall lengths of tubular assemblies to be installed into the well while maintaining multiple well control barriers. This is accomplished by breaking the assembly into short overall section lengths needed to accommodate the limits of common riser and lubricator systems. Once these short or fractional section lengths of subject tubular assemblies are installed or lubricated into the well one at a time, they are joined together either at the planned landing depth in the well or at an up-hole location of convenience and then lowered as one section to the planned landing depth.
Stackable (Slickline/E-Line) *Patent Pending
Stackable Systems for Mono-bore Wells (Slickline/E-Line)
(Coiled Tubing)
Proprietary Surface Deployment (Slick/E-Line/Specialized BOP Systems)
