BOLT AIRGUNS Maintenance, spare parts, firing lines, adapters				UNIVERSITY OF BERGEN Department of Earth Science Allé gt. 41, N-5007 Bergen, Norway

0.1	DRAFT - request for comments	-	14 February, 2019	OM	OM	-
VER.	STATUS	CHANGE	DATE	BY	CKD	APPD

H.S.E. RELATED TO AIRGUN USEAGE

May 2014: When providing engineering services to the design of a new Norwegian research vessel that will also be furnished with air compressors for seismic operations, we need to gather information about the type of quality standards (or practice) that are in effect on these areas in the seismic industry:

Compressed air moisture-, particle-, and oil content.

We can ask geophysical contractors, airgun and compressor manufacturers for advise.

Oil content

Air manifold explosion, as described in IAGC, global HSE Forum September 2007: High Potential Incident Injury After Manifold Explosion. (IAGC = International Association of Geophysical Contractors)	Click to open IAGC report.	High Pressure Incident 2011, IAGC (also local copy)

Other references

Geophysical Operations - IAGC-IOGP Documents
- DRAFT: IAGC: Marine Geophysical Safety Manual ---- check version --- don't use until version number is established (this document lacks pagination and version indicators)
- IAGC MARINE GEOPHYSICAL SAFETY MANUAL Edition 9 - 2004 ---- OBSOLETE
- IAGC: Land Geophysical Safety Manual

SPARE PARTS FOR BOLT AIRGUNS

Solenoid spare parts

Overview of solenoid spares (by Stig Monsen), with Bolt part numbers given:

Solenoid O-rings - click to enlarge

Other spare parts

Bolt part numbers shown.

Bolt mod. 1500 airgun

Bolt mod. 1900 airgun

ADAPTER CABLE FOR BOLT SOLENOIDS

Picture of existing adapter between Bolt Air Gun and firing line. Click to enlarge.

Adapter between Bolt Air Gun and firing line. Click to enlarge.

Adapter length: 155 cm

Bolt solenoid adapter cable, ship side connector.

Bolt solenoid adapter cable, gun side connector.

Wiring

  -------------------------------------------------------------
   AGMU-1004-M
  [Old: QXA-4-M]     Description                Solenoid side
  -------------------------------------------------------------
     1  ---------  "Transducer negative"  ------   T(-)
     2  ---------  "Transducer positive"  ------   T(+)
     3  ---------  "Gunfire coil pins"    ------   S:2
     4  ---------  "Gunfire coil pins"    ------   S:1

Link to A-G Geophysical Catalog ---- also local version.

The adapter cable should mate the normal Bolt solenoid connector in one end, and be furnished with a male QXA-4/12M (or equivalent type sold by A-G Geophysical) connector in the other.

Bolt solenoid top view

A-G Geophysical connector mating Bolt solenoid

A-G Geophysical Bolt Air Gun Connector Model AGS 6204 - Page 32 in A-G catalog

WIRING TYPES AGS 6204

A-G Geophysical connector for firing line

A-G Geophysical Marine Water-Blocked Connector Model AGMU-1004-M - Page 25 in A-G Geophysical Catalog

AGC Cable

Ref. page 54 in A-G Geophysical Catalog

Cable: AGC 9104-6, 4-10-.600
AWG: 10
No. of conductors: 4
Stranding / material: 7x17/32 Tinned Copper Clad Steel
O.D. (in/mm): 0.600 / 15.2
Max ohms / 1000 ft: 4.1

FIRING LINES

Teledyne - AG Geophysical Products Inc.

Specifications:

Airgun firing line, 22 meter long, terminated with these connectors: AGMU-1004-M / AGMU-1004-F
AG Geophysical -- Product Selection Guide (PDF)
Cable specs:
- AGC 9104-6, 4-10-.600
- AWG: 10
- No. of conductors: 4
- Stranding / material: 7x17/32 Tinned Copper Clad Steel
- O.D. (in/mm): 0.600 / 15.2
- Max ohms / 1000 ft: 4.1

Supplier:

Teledyne Marine -- AG Geophysical Products
- AG Geophysical -- Product Selection Guide (PDF)

IMPORTANT INFORMATION FROM TELEDYNE MARINE / A-G GEOPHYSICAL

Silicon Spray

As stated in supplier's recommendation, we should use SILICON SPRAY approved for Polyurethane application as lubrication.

Candidates for approval: