Wiper darts for subterranean operations
First Claim
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1. A dart comprising:
- a deformable body;
a nosepiece connected to a lower terminus of the deformable body; and
a channel extending through the deformable body and the nosepiece;
wherein the deformable body is compressible to an extent at least equivalent to an outer dimension of the nosepiece;
wherein the channel has a pressure sealing member therein;
wherein the pressure sealing member seals in response to downward pressure; and
wherein the pressure sealing member is a seat and a ball, the dart further comprising a ball retainer above the seat of the channel.
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Abstract
Methods and devices useful in subterranean treatment operations are provided. One example of a device is a dart having a deformable body, a nosepiece connected to a lower terminus of the deformable body, and a channel extending through the deformable body and the nosepiece. One example of a method includes providing a dart, providing a production casing having at least one production sleeve therein, placing the dart in the production casing of a well bore, pumping a treatment fluid into the well bore, and allowing the dart to open the production sleeve within the production casing such that the treatment fluid is introduced into the subterranean formation through the production casing.
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Citations
19 Claims
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1. A dart comprising:
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a deformable body; a nosepiece connected to a lower terminus of the deformable body; and a channel extending through the deformable body and the nosepiece; wherein the deformable body is compressible to an extent at least equivalent to an outer dimension of the nosepiece; wherein the channel has a pressure sealing member therein; wherein the pressure sealing member seals in response to downward pressure; and wherein the pressure sealing member is a seat and a ball, the dart further comprising a ball retainer above the seat of the channel. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A dart comprising:
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a deformable body; a nosepiece connected to a lower terminus of the deformable body; and a channel extending through the deformable body and the nosepiece; wherein the deformable body is compressible to an extent at least equivalent to an outer dimension of the nosepiece; wherein the channel has a pressure sealing member therein; wherein the pressure sealing member seals in response to downward pressure; and wherein the pressure sealing member is selected from the group consisting of;
a flapper valve;
a spring loaded check valve; and
a collapsible orifice.
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8. A method of treating a subterranean formation comprising:
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providing a dart comprising a deformable body, a nosepiece connected to a lower terminus of the deformable body, and a channel extending through the deformable body and the nosepiece, wherein the channel has a pressure sealing member therein; providing a production casing having at least one production sleeve therein; placing the dart in the production casing of a well bore; pumping a treatment fluid into the well bore; and allowing the dart to open the production sleeve within the production casing such that the treatment fluid is introduced into the subterranean formation through the production casing. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification