Synthetic base drilling fluid recycling and reusing method
A technology of drilling fluid and synthetic base, which is applied in the direction of centrifuge, etc.
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[0022] Refer to attached figure 1 , as the best implementation mode of the present invention is as follows:
[0023] Comprehensive example
[0024] A method for recovering and reusing synthetic base drilling fluid specifically comprises the following steps:
[0025] a. Store the recovered synthetic base drilling fluid in the 1# tank, and turn on the mixer to stir the drilling fluid to make it uniform.
[0026] b. Pump the synthetic base drilling fluid into the centrifuge for centrifugal separation, recover the separated solid phase, and pump the synthetic base drilling fluid into the 2# tank in the liquid phase.
[0027] c. Add a flocculant to the synthetic base drilling fluid in the 2# tank, flocculate and separate the finely dispersed particles in the drilling fluid, pump the supernatant liquid into the 3# tank to wait for the well supply, and collect the sediment in the lower part.
[0028] In step a, the recovered synthetic-based drilling fluid can be transported in bar...
specific Embodiment
[0036] In the recovery and reuse method of the synthetic-based drilling fluid of the present invention, the recovered drilling fluid is first put into the 1# tank. Since the synthetic-based drilling fluid thickens seriously after storage, it is necessary to turn on the mixer to stir the drilling fluid to make it uniform. Turn on the screw pump to pump the synthetic-based drilling fluid into the centrifuge. The feed pump frequency is 15-25Hz, the drum is 29-32Hz, the screw is 25-29Hz, and the rotation speed is 2000rpm-3000rpm. The synthetic-based drilling fluid processing capacity is 4 ~45m 3 / h. The treated drilling fluid is stored in the 2# tank, and the solid waste is collected. Add flocculants to the 2# tank to further flocculate the finely dispersed particles and reduce the solid phase content of the synthetic-based drilling fluid, which can be loaded and transported to the well after meeting the well supply requirements.
[0037] The mixing time of the synthetic base dr...
Embodiment 1
[0040] Typical Example 1: Synthetic Base Drilling Fluid Centrifuge Treatment
[0041] 150m of the construction of Shenglituo Block 826 3 The synthetic base drilling fluid was recovered, and the rheological parameters of the synthetic base drilling fluid were tested, as shown in Table 1.
[0042] Turn on the horizontal centrifuge at a speed of 2000rpm, use the screw pump to pump the synthetic base drilling fluid into the centrifuge for separation, and the solid waste after centrifugation is 14.91m 3 .
[0043] Take 400mL of synthetic-based drilling fluid from the overflow hole of the centrifuge, and test the rheological properties of the synthetic-based drilling fluid after separation. The performance comparison of the synthetic-based drilling fluid before and after centrifugation is shown in the table below.
[0044] Table 1 Performance comparison of synthetic-based drilling fluid before and after centrifugation
[0045]
[0046] After the centrifuged synthetic-based drill...
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