BLEN-SQUEEZE/BLEN-PLEX

Function

Blen-Squeeze: A single sack lost circulation material.

Blen-Plex: A proprietary cross-linking agent for Blen-Squeeze.


General Description

Blen-Squeeze: Selected sized cellulose fibers blended with a non-damaging cross linkable water soluble polymer.

Blen-Plex: A liquid alkaline salt selected for use under a wide range of conditions.


Product Benefits

  1. A single sack product used to cure severe lost circulation.
  2. Can be used in sweeps without cross-linking.
  3. Can be used as a quick fix unstead of cement.
  4. Easy to use without costly cementing equipment.
  5. Biodegradable, non-damaging to productive formations.
  6. Will not flash set inside the drill string.
  7. Can be used with normal rig equipment.
  8. Excellent for hole cleaning.

Product Description

Blen-Squeeze:

  • Color: Beige to brown mixture
  • Form: Mixed cellulose fibers and polymer blend
  • Bulk Density (lbs./cu.ft.) Compacted: 22-25
  • pH in Water (10 ppb): 7.5-8.5
  • Packaging: 25 lb. multi-ply bag with poly-inner liner.

Blen-Plex:

  • Form: Clear liquid to 32°F
  • pH in water (10 ppb): 12.5-13.5
  • Packaging: 5 gal. plastic pails

Typical Treatment:

  1. For regaining loss of returns: add 10 lbs./bbl. of Blen-Squeeze to water and weight up to desired mud weight. After desired mud weight is achieved add 10-15 lbs/bbl. more of Squeeze to slurry. Mud wieght will determine proper concentration. When pumping downhole, add 5 gals. of Blen-Plex for every 10 bbls. of slurry. It is recommended the slurry be squeezed into the loss zone. Normal set-up time is from 2 to 4 hours.
  2. Can be used as a lost circulation pill without Blen-Plex. Simply follow above recommendation without Blen-Plex.
  3. Excellent hole cleaning sweep. Normally mixed in concentrations of 8-15 ppb and pumped around.

Recommended Uses:

  1. Used to cure severe lost circulation in most vugular or fractured formations:
  2. Temporary plug to run in front of cement squeezes.
  3. Used to improve casing shoe integrity.
  4. Excellent hole cleaning ability.
  5. Used to plug unconsolidated formations such as coarse sand or gravel on surface hole

Handling Recommendations:

Blen-Plex: Highly alkaline - see MSDS and treat as caustic solution.

Crosslink Procedure:

  1. If possible, decide where lost circulation zone is - top and bottom depths.
    - RIH just above lost circulation zone
    - Need not be open-ended
  2. Blen-squeeze crosslink can be pumped through bit if jets are 10 or greater.
  3. Injection pump
    - Place discharge end as close to pit suction as possible.
    - Place short end (suction of pump in blen-plex pail.
  4. Decide size of blen-squeeze slurry to mix.
    - Water (add any type defoamer if necessary).
    - Blen-squeeze (15 lbs per barrel in water).
    - Barite as needed.
    - Mix 15 lbs per barrel of blen squeeze.
  5. Decide at what rate to pump blen-squeeze slurry, normally 2 bbls per minute.
  6. One pail of blen-plex should be used for every 10 bbls of blen-squeeze slurry pumped.
  7. When the blen-squeeze slurry reaches the bit or open-ended drill pipe, it is recommended that the B.O.P. be closed and the Blen-Squeeze slurry be squeezed into the lost circulation zone. Pump slowly.
  8. After all of the Blen-Squeeze slurry is displaced out of the drill pipe, slowly pull pipe up to a safe place.
  9. Wait 2-4 hours for the slurry to set up.
  10. RIH slowly and resume drilling.
  11. On occasion, it may require more than one crosslink pill to cure the L/C problem.

If there are any questions call 337-233-1121

Case History 1:

BLEN-SQUEEZE PRODUCT PERFORMANCE REPORT

DATE: 5/5/98
CUSTOMER: AMOCO
WELL NAME: OCSG 1089 B-4 IC
FIELD: WEST DELTA 90-B
RIG NAME: ENSCO #54
CSG. SIZE: 20'
CSG. DEPTH: 464'
HOLE SIZE: 13 1/2"
MUD WEIGHT: 8.5
MUD VOLUME: 900 bbls.
PUMP RATE: 700 gpm
JETS: 4X14's

PROBLEMS ENCOUNTERED:

Washed and reamed to bottom of drive-pipe at 464' and lost total returns. Attempted to keep hole full with sea-water; hole continued to take fluid with pumps off.

PRODUCT APPLICATION:

BCI was contacted by Amoco Production for a recommendation. The recommendation given was: 50 bbl sweep treatment consisting of 20 ppb of Blen- Squeeze and a system treatment of 5 ppb Blen Squeeze to be added to entire mud system. It was recommended that sweep be pumped first followed by active mud.

MAINTENANCE TREATMENTS:

Maintain 4-5 ppb of Blen-Squeeze in active system and sweep hole with 40-50 bbl's of Blen-Squeeze every 100'.

RESULTS:

Recommendations were followed and all losses were cured. Sweeps and system treatments were followed as recommended throughout surface hole. 10 3/4 surface casing was ran to 2990' and cemented with no problems. No additional mud losses occurred after initial treatment was made and maintenance treatments followed.

Case History 2:

BLEN-SQUEEZE PRODUCT PERFORMANCE REPORT

DATE: May 28, 2000
CUSTOMER: Boise D'Arc/Eagle
WELL: #2
FIELD: South Timb. Blk 11
RIG NAME: Parker 20
OCSG: 13925

Offshore in South Timbalier Block 11, a well was being drilled to 14,750' with 16.5 ppg ligno mud when complete returns were lost at 13,925'. Several attempts to establish circulation was made with heavily concentrated LCM pills. These pills had concentrations of 30-40 ppb of various LCM. The only results the LCM pills could achieve were temporarily stopping the well from taking fluid. Operator then decided to spot a Blen-Squeeze pill.

A Boysenblue/Celtec engineer was dispatched to location. Mud weight was lowered to 16.1 ppb. A 50 bbl pill was premixed utilizing nineteen (19) ppb of Blen-Squeeze and drill water. A trip was made to casing shoe to allow time for well to heal. Trip back in hole required washing and reaming. At 12,900' returns were lost. Premixed, Blen-Squeeze pill was spotted. The drill string was then pulled back into the casing, which was set at 12,263'. The Blen-Squeeze was then squeezed into the formation with 375psi. The pill was allowed to set for four hours and a trip back down the hole was attempted. The drill string was tripped to 12,550' and the well was washed and reamed down to 13,464' where partial returns were lost. A second Blen-Squeeze pill was pumped and spotted at 13,464' and the drill string was pulled up in the casing. The pill was squeezed with 250 psi and waited on for four hours. A trip back to 12,500' was made where washing and reaming resumed. The well was reamed back to 13,925' with no loss of fluid and drilling resumed.

Case History 3:

BLEN-SQUEEZE PRODUCT PERFORMANCE REPORT

DATE: 7/28/99
CUSTOMER: ADTI/Apex Oil & Gas
OCSG: 14492 #1
FIELD: Ship Shoal Block 62
INTERVAL: 2
DEPTH: 4527'
HOLE SIZE: 13 1/2"
CASING: 10 3/4"

PROBLEMS ENCOUNTERED:

Due to the excessive amounts of sand being drilled, operator was unable to clean annulus properly, therefore, excessive build up in the annulus caused increased mud loss to the massive sands drilled. As a turnkey company, it is not to their benefit to stop and circulate. Therefore, Boysenblue/Celtec was called for their recommendation.

RECOMMENDATION:

Boysenblue/Celtec recommended 50 bbls sweeps to be pumped every 100' consisting of 8-10 ppb of Blen Squeeze for the hole cleaning. Also, to aid in maintaining viscosity in 38-45 sec. range, Boysenblue/Celtec recommended adding 1-2 ppb of Blen Squeeze to system.

RESULTS:

By following Boysenblue/Celtec's recommendations, operator was able to complete surface and set casing with no problems. Sweeps were pumped which cleaned annulus as well as sealing and plugging massive sand areas and unconsolidated formations. An initial treatment of 1 #/bbl of Blen Squeeze was added to system to obtain adequate viscosity, thereafter sweeps that were pumped aided in maintaining viscosity along with normal gel addition typical of regular spud ins.

COMMENTS:

Operator was very satisfied with success on this job especially due to the fact that Blen Squeeze used in this way worked great as a hole cleaner, viscosifier and also as a sealing and plugging agent for the massive sand sections and unconsolidated formations.

With the use of Blen Squeeze the operator was able to cut 2 days off of the projected days granted for this interval. As we all know, time is money.

Case History 4:

BLEN-SQUEEZE PRODUCT PERFORMANCE REPORT

DATE: 8/3/99
CUSTOMER: ADTI/NCX Co.
OCSG: 16194 #A-5
FIELD: West Cam 490
INTERVAL: 1
DEPTH: 1003'
HOLE SIZE: 17 1/2" /26"
CSG. SIZE: 20'
MUD VOLUME: 1300 bbls.
DEPTH: 4637'

PROBLEMS ENCOUNTERED:

On prior well, hole was lost due to severe lost circulation problems. On the #A-5 well, a plan was put together to solve these lost circulation problems.

RECOMMENDATION:

Boysenblue/Celtec proposed having a concentrated pill of 15-20 #/bbl Blen Squeeze mixed and ready to be pumped in case of total lost circulation. Also, Boysenblue/ Celtec recommended pumping sweeps using spud mud and adding to it 6-8 #/bbl Blen Squeeze, and 4-5 #/bbl of Blen Plug to be pumped every 100' of new hole drilling. By pumping sweeps this will insure theft zones will be sealed off.

RESULTS:

Hole was drilled to surface casing depth, by sweeping hole every 100' using 6 #/bbl Blen Squeeze and 6 #/bbl Blen Plug. This process worked very well even though extra sweeps were pumped, while drilling through massive sands. There were some losses noticed but not severe and when sweeps were pumped all losses were voided. The concentrated pill was never needed and so it was decided to be pumped over slowly into active system, therefore, giving spud mud a needed viscosity and various particle sizes to aid in cleaning hole and sealing off porous sand sections.

COMMENTS:

Operator was very satisfied with the excellent performance and low cost of Blen Squeeze and now uses Blen Squeeze on all their wells where massive sands are present, not only as a lost circulation material but also as a hole cleaning agent.