Abstract: A flow restrictor device for production tubing comprising an obstructing member. The flow restrictor is arranged for movement between a first position where the obstructing member is located so as to form a seal with an edge of an aperture formed in a wall of said production tubing and is arranged to prevent fluid flow through said aperture, and a second position where the obstructing member is located so that the aperture is unobstructed. The flow restrictor further comprises a retaining arrangement for restricting possible locations of said obstructing member to said first position, second position and positions therebetween. The aperture allows fluid communication between the exterior and interior of the production tubing.

Abstract: The present invention provides for a down-well fluid measuring arrangement, and related methods, having at least one surface defining part of a fluid path, the at least one surface having first and second ports each arranged to deliver fluid to a single pressure gauge (28), one of the ports being provided in the region of an obstruction formation (30) provided in the fluid path, the arrangement further including switch means (34) arranged to change the port delivering fluid to the gauge so as to allow for determination of a pressure difference of the fluid at the said ports and a third port located either upstream or downstream of the first port delivering fluid the gauge to allow of determination of a pressure difference and hence volume fraction.

Abstract: A flow restrictor device (10) for production tubing comprises: an obstructing member (18) arranged for movement between a first position where said obstructing member is located so as to form a seal with an edge of an aperture (14) formed in a wall of said production tubing and is arranged prevent fluid flow through said aperture, and a second position where said obstructing member is located so that the aperture is unobstructed; and a retaining arrangement (16) for restricting possible locations of said obstructing member to said first position, second position and positions therebetween.

Abstract: A completion arrangement and methods of using the completion arrangement are described herein. The completion section includes a completion section and impacting formations. The completion section is arranged to be coupled to production tubing, and has means to allow hydrocarbons to pass therein from reservoir rock in which the wellbore is formed. The impacting formations are drivingly moveable relative to the wellbore. The means being arranged to serve as flushing portals, whereby drilling fluid introduced into the production tubing is arranged to flow via the means into a space between the production tubing and the wellbore, and circulate in the space and the impacting formations. One, or both, of the drilling fluid circulating in the space and the impacting formations are arranged to remove obstructing material and formations from the wellbore for return to surface by way of the space, during insertion of the completion arrangement into the wellbore.

Abstract: The present invention provides a flow restrictor coupling (10) and a method of forming a flow restrictor coupling. The flow restrictor coupling (10) comprises a hollow tubular member (12) having at a first end thereof first means for engagement with an end of a first pipe and, at a second end thereof, second means for engagement with an end of a second pipe, wherein said hollow tubular member (12) is arranged to couple said first pipe to said second pipe and to provide for fluid communication therebetween, said flow restrictor coupling (10) further being arranged to present at least one aperture (26) in a wall of said hollow tubular member between said first and second ends, the aperture (26) having selectively variable dimensions for control of fluid flow therethrough.

Abstract: The invention concerns a method of and apparatus for measuring the flow rate of a continuous phase in a flowing multiphase fluid. It includes the steps of measuring a velocity of the fluid with a thermal anemometer at a location in the flow and simultaneously measuring the passage of a discontinuous phase at the same location with a local probe system capable of measuring the passage of a discontinuous phase, and then using the measurement of the discontinuous phase to correct the measurement of the continuous phase so as to derive the flow rate thereof.

Abstract: A multi-electrode capacitive apparatus for measuring multi-phase flows comprising a pipe through which the flow is directed having the electrodes, typically ten in number, disposed around an outer surface thereof, sensing means being provided for connection to each electrode by means of a switching arrangement, the switching arrangement being operable to vary the connections of the electrodes to the sensing means such that the electric field seen within the pipe rotates; averaging means being provided to determine the average capacitance measured over an integer number of rotations. The pipe can be formed from a material having substantially the same dielectric constant as the flowing material and is of sufficient thickness to optimise the angular sensitivity of the device for flow at the pipe wall. Typically, the internal radius of the pipe is about 0.7 of the radius of the electrode arrangement.