Bj Services Company

Baker Hughes Corporation

Other

Paul H Javora

Qi Qu

Xiaolan Wang

Sandra L Berry

Jinguo Zhang

Cristian A Lopez

Brian Benedict Beall

Joel Lynn Boles

Keith W Sharp

Jacob J Gibson

Mark A Vorderburggen

A well servicing fluid for reducing polymer degradation is disclosed. The well servicing fluid is formulated with components comprising: at least one free radical scavenger, with the proviso that the free radical scavenger is not erythorbate, lignin or lignin derivatives; at least one polymer and an aqueous based solvent. Methods for servicing a well employing well servicing fluids of the present disclosure are also disclosed.

Well fluid and method of servicing a well

A method for forming a well and pipeline treating fluid is provided. The method comprises combining a cross-linkable gelling polymer, a scavenging compound capable of reducing a concentration of divalent and polyvalent metal ions and salts thereof available for reaction, a hydration solvent and optionally an acid. The resulting mixture has a pH ranging from about 3 to about 7 and a first viscosity. The mixture is maintained at conditions suitable for hydration of the cross-linkable gelling polymer until the mixture has a second viscosity that is greater than the first viscosity. The mixture is combined with an aqueous based fluid and at least one cross-linking agent. The pH of the mixture is raised to a sufficient level to allow a desired degree of cross-linking to occur. Other methods, a well and pipeline treating gel and a well and pipeline treating fluid are also provided.

Methods for crosslinking water soluble polymers for use in well applications

A thermal insulating packer fluid contains at least one water superabsorbent polymer and optionally water and/or brine, and a viscosifying polymer. The composition is capable of inhibiting unwanted heat loss from production tubing or uncontrolled heat transfer to outer annuli. The viscosity of the composition is sufficient to reduce the convection flow velocity within the annulus.

Methods of using water-superabsorbent polymers to reduce heat transfer

Method of using water-superabsorbent polymer in production tubing and pipes

A method of reclaiming a well completion brine solution containing metal impurities by introducing to the brine solution an organic chelant of the formula: and may be either a neutral compound, a corresponding salt, or a corresponding quaternary salt, wherein:

Method of reclaiming brine solutions using an organic chelant

A method of reclaiming a well completion brine solution by using an organic chelant that is capable of discriminating between (i) iron and non-zinc heavy metals; and (ii) calcium and zinc. The chelant contains a functional group selected from the group &#x2014;COH or &#x2014;PO(R)Ror a salt or ester thereof, &#x2014;C(O)&#x2014;, &#x2014;OE, &#x2014;SE, &#x2014;N&#x2550;C(R)R, EO&#x2014;N&#x2550;C(R)R, &#x2014;N(R)R, and &#x2014;N(C(O)R)Rgroup optionally substituted with a &#x2014;COOH or &#x2014;PO(R)Ror a salt or ester thereof, &#x2014;SE or &#x2014;OE group, wherein Rand Rare independently selected from E or forms, with nitrogen, phosphorous, oxygen or sulfur, a heterocyclic ring; E is Ror &#x2014;H; Ris a C-Calkyl or aralkyl group or a derivative thereof and Rand Rare independently selected from &#x2014;OH, &#x2014;ORand R.

Fluid producing or injecting wells may be treated with a water-in-oil emulsion for the removal or inhibition of unwanted particulates, including pipe dope, asphaltenes and paraffins. In addition, such emulsions are effective in the displacement of oil base drilling muds and/or residues from such muds from wells. The emulsion may also be used to break the interfacial and/or rheological properties of oil base mud and synthetic oil base mud filter cakes, and act as a demulsifier to break the water-in-oil emulsion present in such oil base and synthetic oil base muds. The water-in-oil emulsions may optionally contain a dispersing agent as well as a surfactant.

Method of using water-in-oil emulsion to remove oil base or synthetic oil base filter cake

A thermal insulating packer fluid contains water and/or brine, a crosslinkable viscosifying polymer, a crosslinking agent and an optional set retarder. The composition is capable of inhibiting unwanted heat loss from production tubing or uncontrolled heat transfer to outer annuli. The viscosity of the composition is such as to reduce the convection flow velocity within the annulus.

Methods of using crosslinkable compositions

A method of reclaiming a well completion brine solution by using an organic chelant that is capable of discriminating between (i) iron and/or non-zinc heavy metals; and (ii) calcium and zinc. The chelant is of the formula: and may be either a neutral compound, a corresponding salt, or a corresponding quaternary salt, wherein:

Method of reclaiming a well completion brine solutions using an organic chelant

A method of reclaiming a well completion brine solution by using an organic chelant that is capable of discriminating between (i) iron and non-zinc heavy metals; and (ii) calcium and zinc. The chelant contains a functional group selected from the group &#x2014;COH or &#x2014;PO(OH)Ror a salt or ester thereof, &#x2014;C(O)&#x2014;, &#x2014;OE, &#x2014;SE, &#x2014;N&#x2550;C(R)R, EO&#x2014;N&#x2550;C(R)R, &#x2014;N(R)R, and &#x2014;N(C(O)R)Rgroup optionally substituted with a &#x2014;COOH or &#x2014;PO(OH)R20 or a salt or ester thereof, &#x2014;SE or &#x2014;OE group, wherein Rand Rare independently selected from E or forms, with nitrogen, phosphorous, oxygen or sulfur, a heterocyclic ring; E is Ror &#x2014;H; Ris a C&#x2013;Calkyl or aralkyl group or a derivative thereof and Ris &#x2014;OH or R.

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Spring, TX, United States of America

Paul H Javora