Abstract: Examples of the present disclosure relate to systems and methods for mapping a wellbore for refracturing. More specifically, embodiments are directed towards utilizing downhole pressure data to identify previously untreated clusters, clusters with cross contamination, and clusters with proper zonal isolation with full pressure integrity.

Abstract: Systems and methods to maintain constant pressure within a chamber within a tool via a sliding seal, wherein the seal moves to increase or decrease the size of the chamber.

Abstract: Utilizing a fluid flow rate within a tool to close and open a vent extending through a circumference of the tool. The vent may be positioned above a packer pair that is configured to extend across an annulus. The tool may include a vent, sliding sleeve, adjustable member, and plunger.

Abstract: Embodiments disclosed herein describe fracturing methods and systems, wherein pressure differentials and fluid flow rates may be utilized to stimulate multiple zones, sleeves, or ports with the same tool.

Abstract: A system (100) for positioning a working tool (21) in a wellbore (1). The positioning system (100) comprises a casing element (110) with a marker (111, 112, 113) provided on an inner surface, the marker (111, 112, 113) having a distinct diameter different from the inner diameter of the casing element (110). The system further comprises a positioning tool (120) with a latching element (121, 122) adapted to form a latch (115) with the marker (111, 112, 113), and a force detector (130) adapted to detect an axial latching force (FL) applied to a tubing string (20) from the latch (115) when the casing element (110) is located within the wellbore (1) and the force detector (130) is located at a surface (2) outside the wellbore (1).

Abstract: Systems and methods to maintain constant pressure within a chamber within a tool via a sliding seal, wherein the seal moves to increase or decrease the size of the chamber.

Abstract: A complementary valve (100) for a movable string (1) in a wellbore application, wherein the movable string (1) comprises: a flow activated valve (400) configured to open when a flow through a central bore (2) is less than a predetermined threshold and to close if the flow exceeds the threshold, and a pressure activated device (200, 300) configured to be activated when an activation pressure, defined as the difference between a bore pressure within the central bore (2) and an ambient pressure around the string (1), is greater than or equal to a first activation pressure and to be deactivated when the activation pressure is less than the first activation pressure. The complementary valve (100) is configured to open a fluid connection (111, 121) between the central bore and the ambient wellbore if the activation pressure is less than the first activation pressure, and to close the fluid connection when the activation pressure is equal to or greater than the first activation pressure.

Abstract: An apparatus to inject a fluid into a geological formation. The apparatus includes a central bore running axially through the apparatus; a normally-closed sleeve valve with a sliding sleeve, the sleeve valve configured to open at a sleeve activation pressure; an upstream packer disposed upstream from the sleeve valve; a downstream packer disposed downstream from the sleeve valve; and a normally-open bottom valve disposed downstream from the downstream packer, the bottom valve configured to block axial fluid flow at a first bore pressure. The upstream packer and the downstream packer are configured to set at a second bore pressure between the first bore pressure and the sleeve activation pressure.

Abstract: The present application describes a velocity chamber to regulate a velocity of fluid between an outer diameter of a piston, and an insert to limit, reduce, etc. erosion against the tool and casing.

Abstract: The present application describes methods and systems for a tool with a new check valve. The check valve may include a piston sleeve that is configured to move towards the proximal end of the tool to seal restrictive ports in a center of the tool responsive to creating a force on the piston sleeve. In embodiments, the movement of the piston sleeve may be counter to the flow of fluid through an inner diameter of the tool, such that the tool may be resettable and repeatable based on fluid flow and/or pressure differentials and not based on drag force through an inner diameter of the tool.