PATENT CLAIM ANALYSIS

Application Number: 16077498
Application Type: Utility
Filing Date: 2018-08
Publication Date: 2019-02
Patent Classification: ["166", "293000"]

Abstract:
Pre-stressed cementing methods involve preparing a cement slurry containing water, inorganic cement, and capsules of an expanding agent. The slurry is placed in an annular region in the well and hardened. Expansion of the set cement is delayed. Water infiltration activates the expanding agent to rupture the capsules and release the expanding agent. The expanding agent reacts to expand the set cement to a state of compression within the annular region. The state of compression can be maintained during changes in casing dimensions from temperature or pressure, mechanical disturbance, or mud contamination. The state of compression in the annular region may be monitored by acoustic impedance measurements.

Claim (Index 12):
A method to cement a subterranean well having a borehole disposed through a formation, comprising:\n (i) preparing the cement slurry comprising water, a hydraulic cement and a plurality of capsules with an expanding agent comprising calcium oxide, magnesium oxide, calcium sulfate hemihydrate, or a combination thereof, surrounded by a water permeable shell; (ii) placing the slurry in an annular region of the well between a first tubular body and a borehole wall, or between the first tubular body and a second tubular body; (iii) hardening the slurry to form an at least partially set cement; and (iv) waiting for infiltration of water into the capsules to hydrate and expand the expanding agent to form an expanded set cement within the annular region.

Metadata:
- Claim Count in Document: 9.0
- Percentile: 96.0
- Lexical Diversity: 1.87302
- Patent Class: 166.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['16091727', '11153046', '15914056', '12594710', '14893818']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7872347307735805
- 35 USC 102 Novelty (BERT): 0.4608444914834271
- Combined Prediction Score: 0.7545957068445652
- Mean Citation Score: 151.54673599999995
- Max Citation Score: 160.63821000000004
- Similarity Product: 118.39789428621236

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test