Halliburton Company

Steven L Schwegman

David Durward Szarka

James C Tucker

Donald W Winslow

Jeffrey S Walter

John T Brandell

Bob L Sullaway

Barry K Holder

Lawrence J Leger

A packer apparatus with a circulating port. A housing of the packer has inflation passages, circulating passages, treating fluid passages, and equalizing passages defined therein. In a straddle packer embodiment, upper and lower packers are mounted on the housing on opposite sides of an outlet of the treating fluid passage. A circulation valve with a sliding differential pressure actuated valve sleeve is disposed below the packers. An inner mandrel is slidably received in the central opening of the housing. The mandrel has a mandrel bore and has upper inflation and circulating ports, lower inflation ports, upper and lower equalizing ports, a treating port and lower circulating ports, all of which communicate with the mandrel bore. The valve sleeve has a valve port. A lug and endless J-slot is operably associated with the housing and mandrel for controlling a telescoping position of the mandrel relative to the housing in response to reciprocation without rotation of the mandrel relative to the housing. The mandrel may also be used to lock the valve sleeve in a closed position. The lug and J-slot define a repeatable sequence of inflating (or deflating) position, intermediate position, circulating position, treating position, equalizing position, and ready position wherein the tool is ready to return to the original inflating position on the next telescoping stroke of the mandrel within the housing.

Coiled tubing inflatable packer with circulating port

A positive circulating valve with a retrievable standing valve therein. The valve is used with a packer positioned therebelow. The circulating valve comprises a housing with a mandrel slidably disposed therebetween. A J-slot controls movement between open and closed positions. When in the open position, mandrel ports in the mandrel are aligned with body ports in the housing so that bypassing and circulating may be carried out. The standing valve prevents fluid flow downwardly through the tool string below the circulating valve when the circulating valve is in the open position. When the circulating valve is in a closed position, the mandrel ports are in communication with a central opening through the housing, allowing fluid to be pumped downwardly through the circulating valve. The standing valve may be removed so that the circulating valve has a substantially unrestricted flow path therethrough for high flow rate fracturing jobs and the like.

Positive circulating valve with retrievable standing valve

An apparatus for hydraulically jetting a well tool having a sliding member includes a positioning tool for operably engaging the sliding member, and a jetting tool connected at a rotatable connection to the positioning tool. The jetting tool is thus rotatable relative to the positioning tool and the well tool. The jetting tool hydraulically jets the well tool as the jetting tool is rotated relative thereto.

Jetting tool

A wash tool includes a housing having upper and lower packer cups attached thereto for sealing between the housing and a casing bore and defining an upper well annulus portion, an intermediate well annulus portion, and a lower well annulus portion. The housing has an upper fluid bypass passage defined therethrough communicating the upper portion and intermediate portion of the well annulus. The housing includes a lower fluid bypass passage defined therethrough for communicating the intermediate portion and the lower portion of the well annulus. A longitudinal housing bore is defined through the housing and has an open lower end so that fluid in the lower portion of the well annulus may return up through the housing bore. The lower packer cup wipes the casing bore as it advances downward through the casing. The fluid exiting the upper bypass passage exits through downwardy directed jets so as to jet wash the intermediate portion of the well annulus as the tool advances down through the casing bore.

Wash tool

A well is completed by cementing a casing string in place in the well. A jetting tool assembly is run into the casing string on a tubing string. The jetting tool assembly engages a sliding sleeve of a casing valve and slides the sliding sleeve to an open position uncovering a plurality of housing ports in the casing valve housing in which the sleeve is received. Then, disintegratable plugs are hydraulically jetted from the housing ports to communicate a subsurface formation adjacent the casing valve with an interior of the casing string. Preferably, prior to opening the sleeve and hydraulically jetting the plugs, residual cement is drilled from the casing string, then further residual cement is hydraulically jetted from the casing valve, and then the casing valve is backwashed by reverse circulation.

Growing community of inventors

Duncan, OK, United States of America

Steven L Schwegman