Degradable pump in shoe
By incorporating a dissolvable or degradable material into the wiper dart and/or float equipment, a fluid can be pumped during the cement phase (or spotted by other means) to begin degradation of the dissolvable material. Once the material is dissolved, a flow path is exposed, allowing communication to the backside or formation of the wellbore through the plug set and shoe track.
1. A process for cementing a wellbore comprising:
placing a bottom plug with a low pressure diaphragm in a production casing;
injecting cement;
placing a top plug with a degradable plug in the production casing, wherein the top plug includes a hollow body having the degradable plug therein;
injecting a wash solution on top of the top plug until at least a portion of the top plug is sealed upon at least a portion of the bottom plug; and
degrading the degradable plug, wherein a fluid flow path is formed through the hollow body of the top plug after the degradable plug is degraded, thereby establishing the production casing in fluid communication with a reservoir.
2. The process of claim 1 , wherein the degradable plug is selected from a group comprising a polymer, gelatin, paper, ceramic, plastic, metal, alloys, or a combination thereof that is degraded by wash solution at reservoir temperatures.
3. The process of claim 1 , wherein the degradable plug comprises an aluminum alloy.
4. The process of claim 1 , wherein the degradable plug degrades within 24 hours after the top plug is tightly sealed upon the bottom plug.
5. The process of claim 1 , wherein the degradable plug degrades within 7 days after the top plug is tightly sealed upon the bottom plug.
6. The process of claim 1 , wherein the degradable plug is selected from a group comprising a sphere, bullet, cylinder, cone, disc, or stopper shaped plug.
7. The process of claim 1 , wherein the degradable plug is retained by a retainer selected from a group comprising spring, clip, packing, or paste.
8. The process of claim 1 , wherein the degradable plug has a tight seal formed by an o-ring or washer.
9. A process for cementing hydrocarbon well comprising:
placing a bottom plug with a low pressure diaphragm in a production casing in a wellbore;
injecting cement on top of the bottom plug in the production casing;
placing a top plug in the production casing, wherein the top plug comprises
an interlocking nose,
a hollow body,
a degradable plug, and
an interlocking tail;
injecting a wash solution on top of the top plug until the top plug is tightly sealed upon the bottom plug; and
degrading the degradable plug,
wherein the production casing is in fluid communication with the wellbore after the degradable plug is degraded.
10. The process of claim 9 , wherein the degradable plug is selected from a group comprising a polymer, gelatin, paper, ceramic, plastic, metal, alloy, or a combination thereof that is degraded by wash solution at reservoir temperatures.
11. The process of claim 9 , wherein the degradable plug comprises an aluminum alloy.
12. The process of claim 9 , wherein the degradable plug degrades within 24 hours after the top plug is tightly sealed upon the bottom plug.
13. The process of claim 9 , wherein the degradable plug degrades within 7 days after the top plug is tightly sealed upon the bottom plug.
14. The process of claim 9 , wherein the degradable plug is selected from a group comprising a sphere, bullet, cylinder, cone, disc, or stopper shaped plug.
15. The process of claim 9 , wherein the degradable plug is retained by a retainer selected from a group comprising spring, clip, packing, or paste.
16. The process of claim 9 , wherein the degradable plug has a tight seal formed by an o-ring or washer.