""
Below is a cache of http://www.titanspecialties.com/upload/EBS_SWITCHES.pdf. It's a snapshot of the page taken as our search engine crawled the Web.
The web site itself may have changed. You can check the current page or check for previous versions at the Internet Archive. Yahoo! is not affiliated with the authors of this page or responsible for its content.
EBS 10579 FM 1954 Wichita Falls, TX 76310 940-691-1005 Office 940-761-3371 FAX IDENTITY AND USE OF EBS SWITCHES
Page 1 of 8
EBS
10579 FM 1954
Wichita Falls, TX 76310
940-691-1005 Office
940-761-3371 FAX


IDENTITY AND USE OF EBS SWITCHES


EBDD (DIODE SWITCH)

Hard wired dual diode switch. Full function can be checked with a meter or
shooting panel. White wire connects to through wire in gun (through circuit),
black or red wire (according to polarity preference) connects to detonator of
upper gun. Lower gun circuit connects to pin on downhole end of switch.

This switch is designed to control two guns or first two guns of multiple gun
string.

Only one dual diode switch can be used per gun string.

Polarity designation EBDD-P (Positive First) black wire (w/blue stripe) to upper detonator EBDD-N (Negative First) red wire (w/blue stripe) to upper detonator White through circuit wire designates dual diode from pressure switch Rating:
350
°
F (450
°
F available) @ 15,000 psi for 1 hour



Page 2 of 8

EBPS (DIODE SWITCH)



Hard wired dual diode switch. Full function can be checked with a meter or
shooting panel. White wire connects to through wire in gun (through circuit),
black or red wire (according to polarity preference) connects to detonator of
upper gun. Lower gun circuit connects to threaded stud on downhole end of
switch. This switch provides efficient method for combining setting tool with gun.

Only one dual diode switch can be used per gun string.


Polarity designation
- EBPS-P (Positive First) black wire to upper detonator
- EBPS-N (Negative First) red wire to upper detonator
- White through circuit wire designates dual diode from pressure switch
- Rating: 350° F for 1 hour




Page 3 of 8
DUAL DIODES



Dual diodes, being hard wired internally, need no outside influence to arm either
gun.

We recommend dual diodes when only two guns are to be fired, when hole depth
may require firing upper gun instead of lower gun, and for the first two guns of
any selective gun string.

The Dual diode schematic is shown below. Only one dual diode switch can be
used per gun string.



Page 4 of 8
P-100 (POSITIVE PRESSURE SWITCH)

Select fire positive switch. Red wire with diode and yellow wire. Yellow wire
connects to through wire in gun (though circuit), downhole pin continues through
circuit to lower gun or guns, and red wire connects to detonator. Red wire is
open until gun below switch detonates. Detonator wire diode blocks NEGATIVE
DC current from detonator but passes POSITIVE +DC current to detonator.

Rating: 350
°
F (450
°
F available) @ 15,000 psi for 1 hour


N-100 (NEGATIVE PRESSURE SWITCH)

Black wire with diode/plain yellow wire. Select fire negative switch. Connects
same as P-100 above with exception that switch blocks POSITIVE +DC current
and passes NEGATIVE DC current to detonator.

Rating: 350
°
F (450
°
F available) @ 15,000 psi for 1 hour




Page 5 of 8
PRESSURE SWITCHES


Our multi-carrier select fire system allows shooting any number of random length
guns with one trip into the well. Length and number of selections are limited only
by rig height, cable head strength, wellbore deviation, etc.

Disposable, polarity discriminating switches provide selective firing control. The
Pressure switch schematic is shown below.

Pressure switches are actuated by the shock wave from charges and detonating
cord in the carrier below the switch. A patented hydraulic function differentiates
between pressure from a flooded gun and blast pressure. This feature prevents
a leak from arming guns out of sequence.




Page 6 of 8
PRESSURE SWITCH LOADING PROCEDURES

Begin loading by inspecting switch sub. Switch bore should be clean and free of
debris. Check passage for wires as well. Switch should fit freely into bores up to
O-Rings.

Unwind switch wires and feed them through sub body. While holding slight
tension on the wires to prevent slack, insert switch body up to O-RINGS. A light
coast of grease on body and o-rings will help sealing and switch removal. Using
any tool that pushes on steel body, gently push or tap switch body home in bore.
DO NOT HIT OR PRESS ON PIN. THIS WILL ACTIVATE SWITCH. Pay
particular attention that switch wires do not become pinched behind switch body.

Pinched or twisted wires are the most common cause of problems.

Connect yellow wire on uphole end of switch to through circuit of gun and
connect Red or Black wire with diode to insulated leg of blasting cap. Downhole
pin continues through circuit to lower gun. As each sub and switch is made up,
we recommend using a blasting meter to check continuity through firing circuit.
This helps to identify and locate any problems immediately, rather than right
before or after going downhole.

When loading guns it is helpful to mark them plainly as Positive or Negative,
depending on the switch used. Red and black paint on the port plugs, charge
scallops, or switch subs, has worked well for this. We identify the polarity of the
switch by which polarity it will pass to a blasting cap after it functions. THE
SWITCH DOES NOT DISCRIMINATE POLARITY ON THROUGH WIRE. It is
important that the operator be aware of the layout and sequence of his guns.

All guns with switches must be fired with DC (direct current). Any AC (alternating
current) will fire all guns at once. The first or bottom gun must be fired with the
opposite polarity of the switch above it.

In the event of a misfire, after following all company SAFETY POLICIES, break
off last fired gun and check circuit through remaining gun sting. After circuit is
established, connect bottom gun circuit to pin and continue perforating. Be
especially careful to note polarity of gun above switch.

Care and attention in loading and assembly will ensure good performance in the
field.

Feel free to call if you have any other questions or problems.

Joel Sansing, Manager
Page 7 of 8
EBS PRESSURE SWITCH
WIRING DIAGRAM



Page 8 of 8
E B and Titan Part Numbers for E B Switches


Dual Diode




EB Part No.

Titan Part No.

EBDD P 350º
TW-EBDD-P
EBDD N 350º
TW-EBDD-N
EBDD P 450º
TW-EBDD-P-450
EBDD N 450º
TW-EBDD-N-450

Plug Shoot (Dual Diode)

EB Part No.

Titan Part No.
EBPS P 350º
TW-EBPS-P
EBPS N 350º
TW-EBPS-N

Pressure Switch

EB Part No.

Titan Part No.
P-100 P 350º
TW-P100
N-100 N 350º
TW-N100
P-100 P 450º
TW-P100-450
N-100 N 450º
TW-N100-450

Retainer Nut

EB Part No.

Titan Part No.
EBRN TW-EBRN