Granted Patent B2

US 11,661,823 · App. 17/352,728 · Granted May 30, 2023

Inventors: Frank Haron Preiss (Bonn, DE); Thilo Scharf (Letterkenny, IE); Liam McNelis (Bonn, DE); Eric Mulhern (Edmonton, CA); David C. Parks (Calgary, CA); Christian Eitschberger (Munich, DE)

Assignee: DynaEnergetics Europe GmbH

E21B43/1185E21B43/119E21B43/11855F42C19/06F42D1/02F42D1/04F42D1/043

Abstract

Claims (75)

1. A wellbore tool string comprising:

a first wellbore tool comprising:

a first carrier extending in an axial direction; and

a first charge holder configured for receiving a first shaped charge, the first charge holder being housed within the first carrier; and a second wellbore tool comprising:

a second carrier extending in the axial direction; and

a second charge holder configured for receiving a second shaped charge, the second charge holder being housed within the second carrier; and

a tandem seal adapter (TSA) positioned between the first carrier and the second carrier, the TSA comprising:

a TSA body formed of a singular, monolithic piece of material;

a bore extending through the TSA body; and

a bulkhead provided within the bore and configured to provide electrical connectivity through the bore, the bulkhead comprising:

outer body provided within the bore and contacting the TSA body, wherein the outer body is non-conductive; and

a first electrical contact extending from a first end of the outer body and in contact with the outer body;

wherein the TSA body is sealingly engaged with the first carrier and the second carrier.

2. The wellbore tool string of claim 1 , wherein the TSA comprises:

a TSA maximum radius portion extending from the TSA body in a radial direction, the radial direction being perpendicular to the axial direction; wherein

a portion of the first carrier abuts the TSA maximum radius portion; and

a portion of the second carrier abuts the TSA maximum radius portion.

3. The wellbore tool string of claim 1 , wherein:

the first carrier comprises first threads;

the second carrier comprises second threads; and

the first threads are engaged with the second threads.

4. The wellbore tool string of claim 1 , wherein:

a first portion of the TSA is positioned inside the first carrier; and

a second portion of the TSA is positioned inside the second carrier.

5. The wellbore tool string of claim 1 , wherein the TSA comprises:

a first TSA region having a first TSA outer diameter;

a second TSA region having a second TSA outer diameter, the second TSA outer diameter being larger than the first TSA outer diameter;

a third TSA region having a third TSA outer diameter, the third TSA outer diameter being smaller than the second TSA outer diameter;

a first shoulder surface extending from an outer surface of the first TSA region to an outer surface of the second TSA region; and

a second shoulder surface extending from an outer surface of the third TSA region to the outer surface of the second TSA region; wherein

the second TSA region is disposed between the first TSA region and the third TSA region in the axial direction;

a portion of the first carrier abuts the first shoulder surface; and

a portion of the second carrier abuts the second shoulder surface.

6. The wellbore tool string of claim 1 , wherein the bulkhead further comprises:

a second electrical contact extending from a second end of the outer body;

wherein the first electrical contact is in electrical communication with the second electrical contact.

7. A wellbore tool string comprising:

a first wellbore tool comprising:

a first carrier extending in an axial direction; and

a first charge holder configured for receiving a first shaped charge, the first charge holder being housed within the first carrier; a second wellbore tool having a second maximum outer carrier diameter:

a second carrier extending in the axial direction; and

a second charge holder configured for receiving a second shaped charge, the second charge holder being housed within the second carrier; and

a tandem seal adapter (TSA), the TSA comprising:

a TSA body formed of a singular, monolithic piece of material;

a bore extending through the TSA body; and

a bulkhead provided within the bore and configured to provide electrical connectivity through the bore, the bulkhead comprising:

outer body provided within the bore and contacting the TSA body, wherein the outer body is non-conductive; and

a first electrical contact extending from a first end of the outer body and in contact with the outer body;

wherein the TSA body contacts the first carrier and the second carrier.

8. The wellbore tool string of claim 7 , wherein:

a first portion of the TSA is positioned inside the first carrier;

a second portion of the TSA is positioned inside the second carrier; and

the first carrier is coupled to the second carrier.

9. The wellbore tool string of claim 8 , wherein:

the first carrier comprises first threads;

the second carrier comprises second threads; and

the first threads are engaged with the second threads.

10. The wellbore tool string of claim 7 , further comprising:

a first seal element provided between the TSA and the first carrier in a radial direction, the radial direction being perpendicular to the axial direction; and

a second seal element provided between the TSA and the second carrier in the radial direction; wherein

wherein the TSA is connected to the first carrier via the first seal element; and

the TSA is connected to the second carrier via the second seal element.

11. The wellbore tool string of claim 7 , wherein the TSA comprises:

a first TSA region having a first TSA outer diameter;

a second TSA region having a second TSA outer diameter, the second TSA outer diameter being larger than the first TSA outer diameter;

a third TSA region having a third TSA outer diameter, the third TSA outer diameter being smaller than the second TSA outer diameter;

a first shoulder surface formed between an outer surface of the first TSA region and an outer surface of the second TSA region; and

a second shoulder surface formed between an outer surface of the third TSA region and an outer surface of the second TSA region;

wherein the second TSA region is disposed between the first TSA region and the third TSA region in the axial direction.

12. The wellbore tool string of claim 11 , wherein:

a portion of the first carrier abuts the first shoulder surface; and

a portion of the second carrier abuts the second shoulder surface.

13. The wellbore tool string of claim 7 , wherein the bulkhead further comprises:

a second electrical contact extending from a second end of the outer body;

wherein the first electrical contact is in electrical communication with the second electrical contact.

Assignments (8)

Priority Claims (1)

Continuity (12)