(1) Dropping a ball to seat in a Hydro-Trip Pressure Sub or shearout Ballseat Sub (Prod. No. BI 799-27 or BI 469-21) located below the packer.

(2) Use of a Differential Displacing Valve provided operations will not require pressuring the tubing before the displacing valve is to be opened.

(3) Landing a BFC Blanking Plug in a BFC Seating Nipple or Sliding Sleeve below the packer. In most cases, the plug can be run, the packer set, and the plug retrieved all in one trip. Where more than one Model "BFH" Packer is to be run, only one of these plugging devices needs to be used below the lowermost packer. This arrangement will result in simultaneous setting of all the "BFH" Packers when the tubing is pressured. If simultaneous setting is not desirable, shear values can be altered so the packers will set in sequence, the bottom first and the top last.

Run the packer to setting depth, flange up the well and displace the tubing. Using one of the methods mentioned above, plug the tubing and increase tubing pressure to approximately 1,000 psi over annulus pressure at the packer. The shear screws will shear, exposing the setting mechanism to the hydrostatic pressure in the well. This pressure completely sets and packs-off the packer.

Shear Ring
Availability Guide

PACKER SIZE	SHEAR RATING lbx1,000
	20	30	40	50
43 45 47 49 51	x x x x x	x x x x x	x x x x x	x x x x

 

MODEL "FHL" HYDROSTATIC SINGLE STRING PACKER
Product No. BI 781-20

The Body Lock Ring mechanically locks in the set so that a drop in hydrostatic pressure can have no effect on the packer. After the packer is set, the tubing is opened by pressuring to force the tripping ball through the pressure sub or displacing valve or by retrieving the BFC plug.

To set packer where hydrostatic Pressure is less than 1,500 psi : The packer is dressed with additional shear screws to increase the actuating pressure to 2,000 psi; and the Hydro-Trip Pressure Sub or Shear-out Ballseat Sub is dressed to require 3,500 psi differential to blow the ball through after the packer is set.

Using a differential displacing valve : This valve offers distinct advantages where it is desirable to displace the tubing after the well is flanged up and the tubing sealed off in a packer below the "BFH". The valve is opened and the tubing displaced, then one ball is dropped to set the packer and close the valve.

To release the packer : The standard Model "BFH" Packer is equipped with a 30,000 Ib Shear Ring for a straight upstrain release. Other values of Shear Rings available are shown in the table below.

An alternate rotational-release is available on special order, which permits the packer to be released by taking an upstrain and rotating to the right. The rotational release has a 50,000 lb 40,000 lb on Size 43 straight upstrain shear-out safety release.