Fishing Technology (4)

Maintaining the Tally Book

Purpose of record keeping

Record keeping is especially helpful when there is a shift change before a
job has been completed. Additionally, records from previous jobs form a
base of information that can be used as a resource when planning fishing
jobs. Record keeping is also important for ensuring that the customer is
billed for the correct equipment and services.

The tally book


The tally book is a short and abbreviated notation of each trip made in the
hole and the tools that were used. The tally book provides important
documentation of the job that is useful for job analysis after the job has been
completed. Additionally, the tally book provides the specifications of the
tools used and services rendered for billing purposes. The tally book should
be kept in such a manner that a relief man could carry on the job with the
information contained in the book.

Rules for keeping the tally book

The tally book must be accurate, legible, and current.
The tally book should include:
  •  a complete description of the fish and all well data
  •  the time, date, number, and brief description of each trip
  •  all parameters, if a milling job is performed. These parameters include:
  1.  depth
  2.  RPM
  3.  strokes per minute (SPM)
  4.  weight on bit (WOB)
  5.  torque
  6.  time
  7.  rate of penetration.
  •  the size and footage along with all auxiliary equipment and daily charges,
if wash pipe is run
  •  a record of any accidents.
Guidelines for the format of the tally book include:
  •  only one trip should be recorded on each page
  •  use one line for each tool description with the OD, ID, length, fishing
neck, and serial number.
The tally book should be kept for future reference.
An example of a tally book 














Fishing resume

The resume is a narrative of the fishing operations and tools that were used
each day. Each trip will be noted along with the outcome of the operation.
The resume is very important because it is the documentation for what the
customer is charged. The billing department will not know what to charge
the customer and the customer will not agree to any charges unless they
have been documented in the resume.
Anything that will be billed to the customer, including estimated repairs or
sold grapples, must be recorded on the resume and signed by the company
man

Signing off on the resume


The company man must sign the job resume when it is completed. We
leave ourselves open to legal action if the company man does not
acknowledge the tools and services that were utilized during the job.

Post-Job Procedures

Completing documentation

The job is not complete until all paperwork, including the resume, and tools
use sheet is completed and signed for.

Breaking down tools

Account for all Weatherford tools. Insure they are loaded in the tool baskets
or loaded on the trucks prior to leaving the job site.
If possible, use the rig tongs to break down all tools that come through the
rotary. Most Weatherford stores do not have the facilities to perform this
operation and vendors charge $100.00 per joint to break down the tools.
However, note that rig time on some offshore rigs is prohibitively expensive
for this operation. For example, when fishing on an offshore rig, especially
in the North Sea, it is cheaper for the customer to be charged for breaking
down the tools at the shop facility.

Transporting equipment


Ensure that all protectors are installed on the tools before transporting them
back to the Weatherford store location. This is important to prevent damage
to exposed threads.
Ensure that only Weatherford property is transported back to the
Weatherford store location. It is difficult to arrange a return trip to bring
equipment that is not the property of Weatherford back to the well site.

Fishing Technology (3)

Fishing Technology Manual

Determining the Amount DOK Required to Reach the Fish

Overview

You will need to determine the amount down on the kelly (DOK) required
to reach the fish in order to design your fishing string. Because you can’t
always rely on the string figures furnished by the customer, it is best to
personally check the figures before beginning operations.

The In and Out Method

The “In” and “Out” method is a good way of checking the string figures for
possible mistakes. The formulas used to calculate the total out and total in
and then the amount DOK required to reach the fish are shown below.







Note: The total “out” must always exceed the total “in” to use this formula.

Example


The following is an example using the “In” and “Out” method for
calculating the depth of the top of the fish.
The customer twisted off while drilling at 4,000 ft. They recovered
3,895.73 feet, including the length DOK. The customer then made a bit trip
and tagged the fish with 37 feet. DOK. To calculate the difference between
the bit run and the following overshot run, subtract the (in) from the (out).
The difference will be the length DOK with overshot run.
See the calculation of the depth of the top of the fish for this example in
Table 1-2





Determining the Kelly Bushing (KB) Measurement


Calculating the original elevation


The standard oilfield measurement to any depth downhole is recorded from
the wellhead, plus the distance to the kelly bushing (KB) on the rig that
drilled the well. This is called the original elevation and is recorded in the
well file.
It is important for everyone to be talking about the same depth. That is why
the total depth is always reported from the original rig elevation. If the
original rig has been replaced by a smaller workover rig, you will need to
account for the difference in this rig’s elevation from the original elevation.


Determining the true well depth


The difference between the original rig elevation and the current rig
elevation is added to or subtracted from the current pipe tally in order to
establish the true well depth. This is called the kelly bushing (KB)
measurement.
For example, assume that the original elevation of a well is 30 feet. The
current elevation is 6 feet. If you start running pipe from the current
elevation, you are already 24 feet into the well. Therefore, in order to reach
a fish that is at a depth of 4,500 feet, you will need to run pipe 24 feet
shorter than 4,500 feet because the depth is measured from the original
elevation (24 feet higher).

Fishing Technology (2)

Fishing Technology Manual

Scheduling Personnel and Equipment

Requirements of the job

When determining the personnel and equipment requirements of the job,
consider previous jobs and possible complications of the job. You may
decide to obtain standby commitments for assets that might be required to
successfully complete the job if the operation does not proceed as initially
planned.

Contact information

The phone number of a contact person on the rig should be secured in case
of any delay or problem lining up the tools. Get good directions to the rig
or boat dock and give the company man a reasonable ETA.

Scheduling required equipment


step:

1-Submit the equipment requirements for the job to the customer’s
operator.
 2-Determine whether or not the rig has sufficient tools.
IF the rig does not have sufficient tools, THEN consider:
- modifying the program and re-submitting the equipment
requirements
- whether Weatherford tools are compatible with the fish and
fishing plan and are available for rental
- special ordering or designing tools.
Note: Consider the time required to design and/or order special
tools and deliver them to the job site.


3-Schedule the delivery of all required tools for the date when
fishing will begin.

Management on Location

Your responsibilities

When you arrive on the rig for a fishing job, you should:
  1.  verify all the pertinent information with the company man and/or tool
    pusher
  2.  check the rig’s equipment
  3.  check the string figures
    During fishing operations, you will need to:
  4.  maintain an accurate fish location
  5.  maintain the tally book
  6.  call in a daily report to the fishing supervisor.
Verifying information

Introduce yourself to the company man and verify all pertinent information
concerning the fish, well, and local conditions. Record the BHA and pipe in
the hole with the company man.
Note: The fishing tool coordinator should be consulted if the company man
does not agree with the Weatherford fishing supervisor’s suggested course
of action. Additionally, the company man must sign the resume when
Weatherford’s suggested course of action is refused.

Checking equipment

Follow the steps below when checking equipment before a fishing
operation.
steps : 
1-The fishing supervisor should personally caliper all tools upon
arrival on location. It is very important to be precise when
callipering tools.
2- Count all pipe on the location and compare with the company
man’s records.
3- Clean out the V door and mark the first joint of pipe on the rack.

4- Count and tie off all pipe in the derrick. The count on the surface
subtracted from the total on location should equal what is in the
hole.