Well gravel pack formation method
AssigneeHalliburton Energy Services, Inc.
InventorPeter J. Edwards
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Abstract
The present invention provides an improved method of formimg a gravel pack in a well and in a subterranean formation penetrated by the well. The method basically comprises the steps of placing a pipe string in the well having a selectively operable shut-off valve and gravel pack forming tools including packer connected therto, and setting the packer to seal the annulus between the well and the pipe string. A pressurized fluid is introduced into the pipe string with the shut-off valve therein closed, and the shut-off valve is opened so that the pressurized fluid surges into the well below the packer and into the formation whereby debris is cleaned from the well and formation. Gravel is then introduced below the packer into the well bore and into the formation to form a gravel pack therein.
Claims20
An improved method of forming a gravel pack in a well and in a subterranean formation penetrated by the well comprising the steps of:
- (a) placing a pipe string in said well having a selectively operable shut-off valve and gravel pack forming tools comprising a packer, a crossover and a sand screen connected thereto, said crossover and sand screen being positioned below said packer and adjacent to said formation;
- (b) setting the packer to seal the annulus between the well and the pipe string;
- (c) introducing a pressurized fluid into said pipe string with said shut-off valve closed so that the pressure of the fluid in said pipe string is greater than the pressure of said formation;
- (d) opening said shut-off valve so that said pressurized fluid surges into said well below said packer and into said formation thereby cleaning gravel blocking debris from said well and formation;
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- (e) introducing gravel below said packer into said well and said formation to form a gravel pack therein around said sand screen.
An improved method of forming a gravel pack in a well and in a subterranean formation penetrated by the well, the well having casing cemented therein and perforations extending through the casing into the formation comprising the steps of:
- (a) placing a work string in said well having a selectively operable shut-off valve and gravel pack forming tools comprising a packer, a crossover and a sand screen connected thereto, said crossover and sand screen being positioned below said packer and adjacent to said perforations extending into said formation;
- (b) setting said packer to seal the annulus between said casing and the work string;
- (c) introducing a pressurized fluid into said work string with said shut-off valve closed so that the pressure of the fluid in said work string is greater than the pressure of said formation;
- (d) opening said shut-off valve so that said pressurized fluid surges into said well below said packer and into said formation by way of said perforations thereby cleaning gravel blocking debris from said well, perforations and formation;
- (e) introducing gravel below said packer into said well, perforations and formation to form a gravel pack therein around said sand screen;
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- (f) removing said work string and shut-off valve from said well.
Dependencies are inferred from the claim text.