PATENT CLAIM ANALYSIS

Application Number: 16068594
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2019-01
Patent Classification: ["166", "084200"]

Abstract:
Provided is a wellhead sealing device of a sucker-rod pumping machine, including a flexible connection unit, and further including a blowout prevention unit, a closing unit, a declination rectification unit and a lubrication unit, wherein the flexible connection unit is arranged between a wellhead and a packing box, and includes a lower flexible sealing sleeve ( 37 ), a lower flexible sealing sleeve housing ( 12 ), a sealing steel ring ( 11 ) and an upper flexible sealing sleeve ( 10 ). Portions above the flexible connection unit follow integrally a polished rod ( 7 ) constantly to swing, such that a packing ( 9 ) is dynamically coaxial with the polished rod ( 7 ) and the problem of eccentric wear of the packing can be completely solved. Furthermore, the device can also solve the problems of static coaxiality and lubrication between the polished rod ( 7 ) and the packing ( 9 ), as well as the problem of blowout prevention when the polished rod ( 7 ) is broken off.

Claim (Index 22):
The wellhead sealing device of a sucker-rod pumping machine according to  claim 8 , wherein a packing ( 9 ) in the packing box can constantly follow the polished rod ( 7 ) to move, so as to achieve dynamic coaxiality between the packing ( 9 ) and the polished rod ( 7 ).

Metadata:
- Claim Count in Document: 38.0
- Percentile: 95.0
- Lexical Diversity: 2.41026
- Patent Class: 166.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['14242541', '14720114', '09878465', '14680740', '11137285']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8058902907667088
- 35 USC 102 Novelty (BERT): 0.4887435868725442
- Combined Prediction Score: 0.7741756203772924
- Mean Citation Score: 216.198126
- Max Citation Score: 231.18678
- Similarity Product: 157.00746668435812

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

Dataset: test