Abstract:
A method and apparatus for altering the reflectivity of a screen when light is supplied to a portion of the screen is disclosed. The orientation and shape of wires disposed on at least one bar of the screen is controlled to alter the reflectivity of the screen. Also provided is a method and apparatus for supporting a screen on a surface such as a wall, including placing slots within the screen for mating with connecting members mounted on a support frame connected to the surface.
Abstract:
The present invention provides a method and apparatus for handling tubulars and drilling with tubulars such as casing into a formation. In one aspect of the invention, the apparatus comprises a circulating head and a cementing head operatively connectible to a gripping member (220). The circulating head (3) is used to circulate drilling fluid while drilling with casing (400), and the cementing head (4) is used to cement the casing string within the formation at a desired depth. The present invention also relates to methods and apparatus for isolating a tensile load from a drilling apparatus rotated by a top drive. In one aspect, the present invention provides a load isolator apparatus having an isolator body operatively connected to the top drive and a torque body at least partially disposed in the isolator body. In operation, the bearing assembly transfers the tensile load from the torque body to the isolator body.
Abstract:
Methods and apparatus for making and breaking tubular connections within a tubular string are disclosed. In certain aspects, a tong assembly includes gated power and back up tongs coupled to a torque bar. Jaws of the tongs may be arranged circumferentially with support members disposed between adjacent jaws to substantially complete a 360° closed circle. A hydraulic circuit may equally distribute fluid and pressure to actuate the jaws. The power tong may include a gated rotor driven by at least three drive motors. The rotor may be selectively physically locked from rotation or movement by one or more rotor locks. Further, the tong assembly may include an interlock that prevents activation of the drive motors until the rotor locks actuate to unlock the rotor. Additionally, gate locks may secure the tongs and rotor when closed, and a releasable coupling arrangement may aid engagement of a motor to a rotor pump.
Abstract:
Embodiments of the present invention generally provide a method, apparatus, and system for monitoring conditions in wellbore (130) in real time prior to setting an inflatable element (112) in the wellbore. The inflatable element is inflated with an inflation tool (114) run on a cable with one or more electrically conductive wires (122) (the cable is commonly referred to as a "wireline" (120)). One or more sensors (118), internal or external to the inflation tool, are monitored before setting the inflatable element to verify well conditions are compatible with the inflatable element. The sensors may be internal or external to the inflation tool.
Abstract:
Embodiments of the present invention generally provide an apparatus, method, and system for operating an electric downhole tool on a non-conductive support line (slickline) by converting a battery voltage to an output voltage suitable for operating the tool. In response to receiving a trigger signal, the output voltage signal is applied to the tool. The tool is controlled by varying the output voltage signal according to a power control sequence. Accordingly, electric tools typically requiring surface intervention by an operator via an electric cable (wireline) may be operated on slickline.
Abstract:
A method of expanding tubing downhole comprises the steps of: providing tubing (14; 44) of a first diameter; running the tubing into a bore (10; 40); expanding a first section of the tubing to a second diameter, and expanding a second section of the tubing to a third diameter.
Abstract:
A method of lining a drilled bore comprises running a tubular (40) into a drilled bore (42) and then corrugating the tubular in the bore. The tubular may also be expanded in the bore. In other aspects of the invention the tubular is corrugated prior to running into the bore and may be rotated as it is run into the bore.
Abstract:
A method and apparatus is disclosed for providing an expandable threaded connection between segments of expandable tubulars is disclosed. Threaded connections are machined into pre-expanded ends (10, 20) of tubulars. Once the threaded connections are machined into the pre-expanded ends (10, 20), two joints (1) of tubulars are connected using the threads, thus creating a pre-expanded threaded connection. After a tubular string is made up and lowered into a wellbore, the entire length of the string is expanded using known methods for expanding tubulars. During the downhole expansion operation, the pre-expanded threaded connections experience minimal expansion. The minimal downhole expansion of the pre-expanded threaded connections allows the threaded connections to maintain their sealing ability and coupling strength.
Abstract:
The present invention generally relates to a method and apparatus (300) for sealing an annulus in a wellbore. In one aspect, the apparatus is an anchoring and sealing system (300) for a downhole tool such as a bridge plug, packer, or frac-plug. The sealing system comprises of a sealing member (210) disposed between a set of energizing rings (220,225), a set of expansion rings (230,235) adjacent each cone, a set of support rings (240, 245), and a set of slips(310,315). The components of the sealing system are arranged such that, when compressed, the sealing member may expand radially into contact with a casing. In another aspect, the apparatus the invention provides for an apparatus that is a downhole sealing tool.
Abstract:
An apparatus (100) for reducing pressure surges in a wellbore comprising a body having a bore (124) therethrough, the bore providing a fluid path for wellbore fluid between a first and second end of the body, at least one fluid path (122) permitting the wellbore fluid to pass between the bore and an annular area formed between an outer surface of the body and the walls of a wellbore therearound, and a number of closure mechanisms (110) whereby the at least one fluid path is selectively closable to the flow of fluid.