Enhanced geometry receiving element for a downhole tool

1. A grooved receiving device forming a portion of a downhole tool, comprising:

a cylindrical body having an interior surface defining a cavity, the cylindrical body having a longitudinal axis and forming an upper portion of the downhole tool, the interior surface having a first diameter and comprising a plurality of axial grooves; wherein:

the cavity is configured to pass a fluid received from an interior of the downhole tool;

each of the plurality of axial grooves define a depth that extends radially into the interior surface to a second diameter, the second diameter greater than the first diameter; and

each of the plurality of axial grooves define a width spanning between a first interior surface radius and a second interior surface radius, the width extending to an axial groove length along the longitudinal axis.

2. The device of claim 1 , wherein the grooved receiving device is configured to receive a conventional inside grappling fishing tool.

3. The device of claim 2 , wherein the downhole tool is an interior flow through plunger tool configured for use in a hydrocarbon wellbore.

4. The device of claim 1 , wherein the width of each of the axial grooves is no more than 0.75 inch.

5. The device of claim 1 , wherein the axial grooves are concentric about the longitudinal axis.

6. The device of claim 1 , wherein each of the axial grooves extend axially along and into the interior surface to a first length.

7. The device of claim 6 , wherein the second diameter is constant along the first length.

8. The device of claim 6 , wherein the second diameter is variable along the first length.

9. The device of claim 1 , wherein the plurality of axial grooves are rifled axial grooves.

10. The device of claim 1 , wherein the plurality of axial grooves are two or more axial grooves.

11. The device of claim 1 , wherein:

the first diameter defines a nominal inner diameter cross-sectional area of the upper portion of the downhole tool;

the plurality of axial grooves extending radially into the interior surface define an enhanced geometry inner diameter cross-sectional area of the upper portion of the downhole tool; and

the ratio of the enhanced geometry inner diameter cross-sectional area to the nominal inner diameter cross-sectional area is between 1.01 and 1.40.

12. The device of claim 1 , wherein:

the first diameter defines a nominal perimeter of the upper portion of the downhole tool;

the plurality of axial grooves extending radially into the interior surface define a grooved perimeter of the upper portion of the downhole tool; and

the ratio of the grooved perimeter to the nominal perimeter is between 1.01 and 1.5.

13. A grooved receiving device forming a portion of a downhole tool, comprising:

an interior surface defining a cavity of the grooved receiving device, the grooved receiving device having a longitudinal axis, the interior surface comprising a plurality of axial grooves and the cavity having a nominal first diameter, the interior surface coupled to a downhole tool interior surface; wherein:

the cavity is configured to pass a fluid received from an interior cavity of the downhole tool;

each of the plurality of axial groves define a depth that extends radially into the interior surface from the nominal first diameter to a second diameter, the second diameter greater than the nominal first diameter; and

each of the plurality of axial grooves define a width spanning between a first interior surface radius and a second interior surface radius, the width extending to an axial groove length along the longitudinal axis.

14. The device of claim 13 , wherein the downhole tool device is an interior flow through plunger.

15. The device of claim 13 , wherein each of the set of axial grooves extend axially to a first length and are concentric about the longitudinal axis.

16. The device of claim 13 , wherein the device forms a fishing neck adapted to receive a conventional inside grappling fishing tool.

17. The device of claim 11 , wherein the plurality of axial grooves are three or more axial grooves.

18. The device of claim 11 , wherein the width of each of the axial grooves varies along the longitudinal axis.

19. A method of descending and retrieving a grooved fishing neck downhole tool within a tubular string of a wellbore, comprising:

positioning the grooved fishing neck downhole tool within the tubular string, the grooved fishing neck downhole tool comprising:

a cylindrical body adapted to fit within the tubular string, the cylindrical body having a longitudinal axis and having a body interior surface defining a cavity of a first diameter, the cavity adapted to pass a fluid from the cavity and out an upper portion of the cylindrical body; and

a set of axial grooves disposed on the body interior surface at the upper portion, each of the set of axial grooves extending radially to a first depth and defining a second diameter, each of the set of axial grooves defining a width spanning between a first body interior surface radius and a second body interior surface radius, the width extending to an axial groove length along the longitudinal axis;

descending the grooved fishing neck downhole tool within the tubular string to a fixed location, wherein fluid passes through the set of axial grooves;

lowering a conventional inside grappling fishing tool toward the grooved fishing neck downhole tool;

engaging the conventional inside grappling fishing tool with at least a portion of the grooved fishing neck downhole tool adjacent the set of axial grooves; and

pulling the conventional inside grappling fishing tool up the tubular string so as to retrieve the grooved fishing neck downhole tool.

20. The method of claim 19 , wherein the grooved fishing neck downhole tool is a grooved fishing neck interior flow through plunger.