Exhibit A

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EXHIBIT A 

PRELIMINARY INVALIDITY CONTENTIONS – CHART OF PRIOR ART 

Pursuant to the Court’s scheduling order (Dkt. 25), Defendant Nine Energy Service, Inc. (“Nine”) hereby provides the below chart 

setting forth where in each of the identified prior art references that each element of claims asserted by Plaintiff NCS Multistage, Inc. 

(“NCS”), are found. The chart below addresses asserted claims 14-15, 22-25, 27, 28-31, 36, 37-43, 46, 50-53, and 55-57 of U.S. Patent 

10,465,445, including any independent claims from which the asserted claims depend. 

In compiling these contentions, Nine has relied in part on NCS’s Infringement Contentions dated July 10, 2020. In those contentions, 

NCS appears to assign overly broad claim constructions in an effort to assert infringement where none exists, and to accuse a product 

that does not infringe the asserted claims. Nine’s Preliminary Invalidity Contentions take into account NCS’s apparent constructions 

and may reflect aspects of the prior art that satisfy those constructions. Nine’s assertion that a particular limitation is disclosed by a 

prior art reference, however, is not an admission that NCS’s apparent claim interpretations are supportable or proper or that the claim 

limitations in question are definite or otherwise amenable to construction. Nine will argue for appropriate constructions of any term or 

claim of any patent at issue in this action on the schedule set by the Court. Moreover, Nine may seek to amend these invalidity 

contentions to account for any new interpretation or applications of the asserted claim, for example, if NCS changes its infringement 

theories or the Court issues a claim construction order. 

Nine respectfully submits that each and every one of the asserted claims is invalid as anticipated or obvious in view of one or more of 

the following prior art references. 

# Claim Language Citations to Prior Art 

1.0 A float tool configured for use in a casing 

string for a wellbore containing a well fluid, 

the casing string having an internal diameter 

that defines a fluid passageway between an 

upper portion of the casing string and a lower 

portion of the casing string, the float tool 

comprising: 

U.S. Patent 7,661,480 to Al-Anazi (“Al Anazi”), at Abstract, Figs. 1-4, 

1:6-8, 1:12-19; 1:42-53; 2:3-8; 2:28-36; 2:46-63. 

Frank Allen, et al., Extended-Reach Drilling: Breaking the 10-km Barrier

(BP Exploration Operation Co. Ltd. 1997) (“Allen 1997”), at 46-47. 

Int. Pub. No. WO2009116871A1 to Brandsdal et al. (“Brandsdal 2009”), 

at 5:23-6:10; Figs. 1, 2. 

U.S. Pat. No. 6,634,430 to Dawson et al. (“Dawson 2003”), at 4:10-41; 

Fig. 1. 

U.S. Pat. No. 4,512,491 to DeGood et al. (“DeGood 1985”), at 4:53-6:38. 

WO1991012451A1 to Degraaf et al. (“Degraaf 1991”), at 3:9-31. 

U.S. Pat. No. 2,756,828 to Deily et al. (“Deily 1956”), at 2:63-3-3; Fig. 1. 

U.S. Pat. No. 5,188,182 to Echolas et al. (“Echolas 1993”), at 2:65-3:41.

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# Claim Language Citations to Prior Art 

U.S. Pat. No. 3,831,680 to Edwards et al. (“Edwards 1974”), at 3:27-4:21. 

U.S. Pat. 9,624,750 to Entchev, et al. (“Entchev 2017”), at 5:61-6:8, 

12:38-13:3, 23:19-25, Fig.1, Fig. 3A, Fig. 3B, Fig. 10, Fig. 11. 

U.S. Pat. 8,820,437 to Ervin, et al. (“Ervin 2014”), at Abstract, 2:38-52, 

3:11-30, 8:46-9:13, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 9. 

U.S. Pat. 244,042 to Farrar (“Farrar 1881”), at 2:30, 2:48-52, Fig. 1, Fig. 

2. 

U.S. 5,050,630 to Farwell & Mundt (“Farwell 1991”), at Abstract, 2:10-

22, 3:48-58, 6:42-56, 7:50-8:12, Fig. 1. 

U.S. Pat. 5,924,696 to Frazier (“Frazier 1999”), at Abstract, 1:23-42, 

2:11-24, 3:65-4:15, 4:30-5:17, Fig. 1, Fig. 6, Fig. 7. 

U.S. Pat. 7,287,596 to Frazier & Chapman (“Frazier 2007”), at 3:38-52, 

4:62-5:5, 8:19-50, Fig. 1, Fig. 2. 

U.S. Pat. 7,708,066 to Frazier (“Frazier 2010”), at 3:53-4:3, 11:30-46, 

Fig. 1, Fig. 2, Fig. 6, Fig. 9. 

U.S. Pat. 8,813,848 to Frazier (“Frazier 2014”), at Abstract, 3:22-34, 

4:22-49, Fig. 1, Fig. 3, Fig. 4, Fig. 7, Fig. 8, Fig. 9, Fig. 11, Fig. 12, Fig. 

13. 

U.S. Pat. 9,194,209 to Frazier (“Frazier 2015”), at Abstract, 2:25-41, 

10:11-23, 11:46-53, 12:57-64, Fig. 6, Fig. 7. 

U.S. Pat. 6,334,488 to Freiheit (“Freiheit 2002”), at Abstract, 3:31-44, 

6:56-7:10, 7:45-8:6, Fig. 1B, Fig. 4, Fig. 5, Fig. 6. 

WO 2003/052239 to Friend, et al. (“Friend 2003”), at Abstract, 1:9-17, 

1:28-32, 2:13-18, 4:31-34, 9:4-6, 14, 16-17, Fig. 1, Fig. 3. 

U.S. Pat. 5,479,986 to Gano, et al. (“Gano 1996), at Abstract, 2:15-40, 

3:4-9, 3:43-52, 6:46-57, 7:36-56, 8:27-55, 10:38-46, 11:5-15, 12:28-32, 

12:40-64, Fig. 2A, Fig. 3. 

U.S. Pat. 5,685,372 to Gano (“Gano 1997”), at 2:33-36, Figs. 1-4. 

U.S. Pat. 7,963,342 to George (“George 2011”), at 4:63-65, 6:65-7:57, 

7:64-12:11, 7:42-48, 7:60-8:45, 9:8-67, Fig. 1, Fig. 2, Fig. 3. 

U.S. Pat. 6,472,068 to Glass, et al. (“Glass 2002”), at Abstract, 1:9-2:57, 

4:16-34, 6:14-18, 6:48-52, Fig. 3.

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# Claim Language Citations to Prior Art 

U.S. Pat. 6,561,275 to Glass, et al. (“Glass 2003”), at Abstract, 6:23-57. 

U.S. Pat. 7,513,311 to Gramstad, et al. (“Gramstad 2009”), at Abstract, 

1:5-9, 1:13-2:4, 2:8-14, 3:19-22, 3:30-34, 6:48-57, 8:41-53, Fig. 1A, Fig. 

1B, Fig. 2A, Fig. 2B, Fig. 3, Fig. 4A, Fig. 4B. 

U.S. Pat. 7,963,340 to Gramstad, et al. (“Gramstad 2011”), at 7:59-62, 

8:25-27, 9:1-16, 9:33-10:10. 

U.S. Pat. 4,664,184 to Grigar (“Grigar 1987”), at 1:58-66, 2:27-3:45, 

4:11-41, 5:47-6:19, Fig. 1, Fig. 2. 

U.S. Pat. 7,624,796 to Hassel-Sorensen (“Hassel 2009), at Abstract, 2:60-

61, 4:15-19, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6A, Fig. 6B, Fig. 6C. 

U.S. Pat. 7,117,946 to Herr (“Herr 2006”), at 12:12-22, 23:33-24:15, 

25:52-56, Fig. 3, Fig. 4. 

U.S. Pat. 6,672,389 to Hinrichs (“Hinrichs 2004”), at Abstract, 1:11-15, 

2:1-19, 3:15-24, 3:57-4:5, 6:35-46, 7:60-8:45, 9:8-55, Fig. 1, Fig. 2, Fig. 

3, Fig. 4. 

U.S. Pat. 7,673,689 to Jackson, et al. (“Jackson 2010”), at Abstract, 1:60-

65. 

U.S. Pat. 5,996,696 to Jeffree, et al. (“Jeffree 1999”), at Abstract, 1:26-32, 

2:27-34, 3:15-30, 4:6-33, 4:39-45, 4:62-5:48, 6:20-51, Fig. 1, Fig. 2. 

U.S. Pat. 3,599,713 to Jenkins (“Jenkins 1971”), at 1:38-53, 2:63-3:30, 

3:42-4:4, 4:11-31, Fig. 1. 

U.S. Pat. 7,789,162 to Keller, et al. (“Keller 2010”), at Abstract, 4:7-31, 

6:3-20, 7:31-58, Fig. 1, Fig. 2A, Fig. 2B, Fig. 3. 

U.S. Pat. 7,455,116 to Lembcke, et al. (“Lembcke 2006”), at 3:62-65, Fig. 

1, Fig. 2. 

U.S. Pat. 4,691,775 to Lustig & Ellis (“Lustig 1987”), at Abstract, 2:65-

3:5. 

U.S. Pat. 2,565,731 to Luther (“Luther 1951”), at 1:50-2:5, Fig. 1, Fig. 2, 

Fig. 3. 

Oil and Gas Online, Single MagnumDiskTM (June 21, 2011) (“Magnum 

Oil Tools 2011”).

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# Claim Language Citations to Prior Art 

Owen Oil Tools, Magnum Ported Underbalance Sub (Core Lab 

September 2012) (“Magnum Oil Tools 2012”), at 1-2. 

U.S. Pat. 5,117,915 to Muller, et al. (“Muller 1992”), at Abstract, 3:18-

4:29, 5:59-6:4, 8:34-49, Figs. 3A-F, Fig. 7. 

U.S. Pat. 1,884,165 to Otis (“Otis 1932”), at 1:33-44, 2:65-77, Fig. 1, Fig. 

2. 

Owen Oil Tools, Surge Tool, Underbalance Sub (Core Lab June 2002) 

(“Owen Oil Tools 2004”), at 1-3. 

Rogers et al., Buoyancy Technology Used Effectively in Casing Running 

Operations to Extend Lateral Stepout, SPE/IADC 148541 (Oct. 24, 2011) 

(“Rogers 2011”), at 2-3, 11; Fig. 13. 

U.S. No. 5,829,526 to Rogers, et al. (“Rogers 1998”), at 4:18-64; Figs. 2, 

6-12; 

U.S. Pub. No. 2009/0020290 to Ross, et al. (“Ross 2009”), at ¶¶ [0002], 

[0010]; Figs. 1-3. 

Shaker et al., Implementation of New Technologies for Oil and Gas 

Industry, SPE 88738 (Oct. 2004) (“Shaker 2004”), at 1, 3, 5-6. 

Can. Pub. No. CA2670218 to Sherman, et al. (“Sherman 2010”), at ¶¶ 

[0001], [0033]. 

U.S. Pub. No. 4,553,559 to Short (“Short 1985”), at 2:13-40, 5:45-47. 

U.S. Pub. No. 2009/0056955 to Slack (“Slack 2009”), at ¶¶ [0002], 

[0004]. 

**U.S. Pub. No. to Snider et al. (“Snider 1996”), at 2:41-65, 6:21-63; Fig. 

3. 

U.S. Pub. No. 2003/0168214 to Sollesnes (“Sollesnes 2003”), at ¶¶ 

[0001]- [0002]. 

U.S. Pat. No. 4,813,481 to Sproul et al. (“Sproul 1989”), at 1: 5-45, 2:50-

55. 

U.S. Pat. No. 7,950,409 to Stokes et al. (“Stokes 2011”), at 1:8-31. 

U.S. Pat. No. 6,397,950 to Streich et al. (“Streich 2002”), at 5:20-43; Figs. 

5-6. 

Can. Pat. No. 2469251 to Sundholm et al. (“Sundholm 2010”), at 1:3-25.

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# Claim Language Citations to Prior Art 

TCO TDP-PO 500 x 300 Drawing, TCO AS (July 30, 2012) (Provided in 

PGR2020-00078) (“500x300 TDP-PO Plug”), at 1, 6. 

TCO TDP PoP 572 x 375 Drawing, TCO AS (Drawing No. 1018-12-001) 

(provided in PGR2020-00078) (“572x375 TDP-PO Plug”), at 1, 11. 

TCO AS v. NCS Multistage Inc., PGR2020-00078, Paper 3 (Aug. 5, 2020) 

(“TCO PGR2020-00078”), at 49-51. 

U.S. Pat. No. 4658902 to Wesson et al. (“Wesson 1987”), at 1:6-33; 2:56-

31.

1.1 a rupture disc assembly comprising (i) a 

tubular member having an upper end and a 

lower end, the upper and lower ends 

configured for connection in-line with the 

casing string and 

Al-Anazi, at Abstract, Figs. 1-4, 1:6-8; 1:12-19; 1:36-54; 1:58-64; 2:3-22; 

2:28-34; 2:46-63; 3:3-9. 

Allen 1997, at 46-47. 

Brandsdal 2009, at 5:23-6:10; Figs. 1, 2. 

DeGood 1985, at 4:53-6:38. 

Degraaf 1991, at 3:9-31. 

Deily 1956, at 2:63-3-3; Fig. 1. 

Echolas 1993, at 2:65-3:41. 

Edwards 1974, at 3:27-4:21. 

Entchev 2017, at 12:18-21, 12:38-13:3, 23:19-25, Fig.1, Fig. 3A, Fig. 3B, 

Fig. 10, Fig. 11. 

Ervin 2014, at Abstract, 2:38-52, 3:11-30, 4:6-12, 8:66-9:13, 9:33-43, Fig. 

1, Fig. 2. 

Farrar 1881, at 2:16-40, Fig. 1, Fig. 2, Fig. 3. 

Farwell 1991, at Abstract, 2:10-22, 3:16-19, 3:48-58, 6:42-56, 7:50-8:12, 

Fig. 1, Fig. 2. 

Frazier 1999, at Abstract, 1:23-42, 2:11-37, 3:65-4:15, 4:30-5:17, Fig. 1, 

Fig. 6, Fig. 7. 

Frazier 2007, at 3:34-52, 6:16-23, 6:33-42, 8:19-50, Fig. 1, Fig. 2, Fig. 3, 

Fig. 4. 

Frazier 2010, at 3:53-4:3, Fig. 1, Fig. 2, Fig. 5, Fig. 6, Fig. 9. 

Frazier 2014, at 3:27-34, 5:44-61, 6:66-7:11, 8:34-43, Fig. 1, Fig. 3, Fig. 

4, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig 10, Fig. 11, Fig. 12, Fig. 13.

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# Claim Language Citations to Prior Art 

Frazier 2015, at Abstract, 2:25-41, 10:11-23, 11:46-53, 12:57-64, Fig. 6, 

Fig. 7. 

Freiheit 2002, at Abstract, 3:31-44, 7:45-8:6, Fig. 1B, Fig. 4, Fig. 6. 

Friend 2003, at Abstract, 2:13-18, 4:31-34, 9:4-17, 14, 16-17, Fig. 1, Fig. 

3, Fig. 4. 

Gano 1996, at Abstract, 1:5-8, 2:15-31; 3:4-9, 3:43-52, 6, 6:46-57, 8:27-

31, 10:40-41, 11:10-11, 12:28-32, 12:40-64, Fig. 2A, Fig. 3. 

Gano 1997, at 2:47-55, 2:64-66, Figs. 1-4. 

George 2011, at 4:6-18, 4:30-44, 5:9-19, 6:65-7:57, 7:64-12:11, Fig. 1, 

Fig. 2, Fig. 3. 

Glass 2002, at Abstract, 1:9-12, 1:40-2:57, 2:59-3:14, 4:16-63, 6:14-18, 

6:48-52, Fig. 3. 

Glass 2003, at Abstract, 6:23-57. 

Gramstad 2009, at Abstract, 1:13-2:4, 2:8-24, 3:11-53, 6:48-57, 7:42-48, 

8:41-53, Fig. 1A, Fig. 1B, Fig. 2A, Fig. 2B, Fig. 3, Fig. 4A, Fig. 4B. 

Gramstad 2011, at 7:59-67, 8:25-40, 9:1-16, 9:33-10:10. 

Grigar 1987, at 1:58-66, 3:8-24, 4:11-41, 5:47-6:19, Fig. 1, Fig. 2. 

Hassel 2009, at Abstract, 1:13-30, 2:60-3:6, 6:19-37, Fig. 1, Fig. 2, Fig. 3, 

Fig. 4, Fig. 5, Fig. 6A, Fig. 6B, Fig. 6C. 

Herr 2006, at 12:12-22, 12:35-43, 23:33-24:15, 25:52-56, Fig. 3, Fig. 4. 

Hinrichs 2004, at Abstract, 1:41-54, 2:5-19, 3:15-30, 3:46-48, 4:6-31, 

6:35-46, 7:60-8:45, 9:8-55, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 8. 

Jackson 2010, at Abstract, 1:65-2:34, 2:63-3:2, Fig. 1, Fig. 2, Fig. 3, Fig. 

4, Fig. 5, Fig. 6, Fig. 7, Fig. 8. 

Jeffree 1999, at Abstract, 1:47-49, 2:35-38, 2:57-3:30, 4:6-33, 4:39-45, 

4:63-5:33, 6:20-51, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6. 

Jenkins 1971, at 1:44-53, 1:63-70, 2:63-66, 3:42-4:4, 4:11-31, 4:38-43, 

Fig. 1. 

Keller 2011, at 7:40-42, 8:23-43, Fig. 1, Fig. 2A, Fig. 2B, Fig. 3. 

Lembcke 2008, at 3:65-4:4, Fig. 1, Fig. 2, Fig. 3, Fig. 5. 

Lustig 1987, at Abstract, 2:5-26, 3:49, 4:8-67, Fig. 1, Fig. 2. 

Luther 1951, at 1:50-2:5, Fig. 1, Fig. 2, Fig. 3.

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# Claim Language Citations to Prior Art 

Magnum Oil Tools 2011. 

Magnum Oil Tools 2012, at 1-2. 

Mueller 1992, at 5:6-15, 8:34-49, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 7. 

Otis 1932, at 1:38-44, 2:65-77, Fig. 1, Fig. 2, Fig. 6. 

Owen Oil Tools 2004, at 1-3. 

Petrowsky 2013, at ¶ [0010]; Fig. 1. 

Phi 2008, at ¶¶ [0017], [0036], [0047]-[0050]; Figs. 2, 6-7. 

Rogers 2011, at 3-4, 11; Fig. 13. 

Ross 2009, at ¶ [0002]. 

Shaker 2004, at 1, 3, 5-6. 

Sherman 2010, at ¶ [0033]. 

Short 1985, at 5:47-56, 65-68. 

Slack 2009, at [0005]. 

Snider 1996, at 6:21-63; Fig. 3. 

Sollesnes 2003, at ¶ [0011]. 

Sproul 1989, at 2:50-55. 

Sundholm 2010, at 1:3-25. 

500x300 TDO-PO Plug, at 1, 6. 

572x375 TDO-PO Plug, at 1, 11. 

TCO PGR2020-00078, at 51-52. 

Wesson 1987, at 1:6-33; 2:56-31.

1.2 (ii) a rupture disc having a rupture burst 

pressure and in sealing engagement with a 

region of the tubular member within the upper 

and lower ends, expedited 

Al-Anazi, at Abstract, Figs. 1-4, 1:6-8; 1:12-19; 1:36-54; 1:58-64; 2:3-22; 

2:28-34; 2:46-63; 3:3-9. 

Allen 1997, at 46-47. 

Brandsdal 2009, at 7:7-31; Figs. 3, 4. 

DeGood 1985, at 4:53-6:38. 

Degraaf 1991, at 3:9-31. 

Deily 1956, at 2:63-3-3; Fig. 1. 

Edwards 1974, at 3:27-4:21. 

Entchev 2017, at 6:18-35, 13:10-26, 13:36-50, 13:57-14:2, 14:3-12, 

16:54-17:18, 18:6-36, 19:15-19, 24:1-17, Fig. 3B.

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# Claim Language Citations to Prior Art 

Ervin 2014, at Abstract, 2:38-52, 3:11-30, 4:6-12, 9:33-67, Fig. 1, Fig. 2, 

Fig. 3, Fig. 4, Fig. 5, Fig. 9, Fig. 10, Fig. 11. 

Farrar 1881, at 2:16-34, 2:37-57, 2:53-73, Fig. 1, Fig. 2, Fig. 3. 

Farwell 1991, at Abstract, 1:13-23, 2:10-22, 3:19-44, 3:59-67, 6:42-56, 

7:50-8:12, Fig. 1, Fig. 2. 

Frazier 1999, at Abstract, 1:23-42, 2:11-37, 2:48-64, 3:40-47, 3:65-4:15, 

4:30-5:17, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7. 

Frazier 2007, at 4:44-50, 6:5-15, 7:12-21, 7:32-42, 8:19-56, Fig. 1, Fig. 2, 

Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7. 

Frazier 2010, at 3:53-4:3, 5:51-63, 12:31-40, Fig. 1, Fig. 2, Fig. 3B, Fig. 

4E, Fig. 5, Fig. 6, Fig. 9. 

Frazier 2014, at 3:27-4:21, 4:50-5:7, 5:35-38, 5:44-6:37, 6:66-7:55, 7:56-

8:19, 8:38-10:5, Fig. 1, Fig. 3, Fig. 4, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, 

Fig. 11, Fig. 12, Fig. 13. 

Frazier 2015, at Abstract, 2:25-41, 4:28-34, 8:60-67, 11:46-12:28, 12:57-

13:14, 13:29-49, Fig. 2A, Fig. 2B, Fig. 3, Fig. 6, Fig. 7. 

Freiheit 2002, at Abstract, 3:31-44, 3:50-59, 4:11-50, 5:21-6:55, 7:17-26, 

7:45-8:38, Fig. 1B, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6. 

Friend 2003, at Abstract, 1:30-2:2, 2:15-25, 6:29-7:4, 9:7-17, 14-19, Fig. 

3, Fig. 4, Fig. 6, Fig. 7, Fig. 8. 

Gano 1996, at 2:32-50, 3:10-16, 3:43-52, 4:6-35, 5:32-35, 5:38-42, 7:3-

14, 7:47-8:14, 8:18-26, 8:31-41, 8:62-9:19, 10:42-43, 11:12-15, 12:28-32, 

12:36-37, 12:40-64, 8:4-6, 8:16-19, Fig. 2A, Fig. 2B, Fig. 3. 

Gano 1997, at 1:37-42, 3:18-26, 3:32-40, 4:32-5:7, Figs. 1-4. 

George 2011, at 4:6-18, 4:30-44, 5:9-19, 6:42-7:57, 7:64-12:11, Fig. 1, 

Fig. 2, Fig. 3. 

Glass 2002, at Abstract, 1:9-12, 2:9-57, 2:59-4:2, 4:11-63, 6:4-6, 6:14-18, 

6:33-40, 6:45-65, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5. 

Glass 2003, at Abstract, 6:23-57, 23:33-24:15, 24:23-27, 24:47-49. 

Gramstad 2009, at Abstract, 1:13-2:4, 2:15-24, 3:11-34, 3:54-4:3, 4:21-

32, 5:6-6:30, 6:58-7:10, 7:27-32, 7:49-52, 8:24-53, Fig. 1A, Fig. 1B, Fig. 

2A, Fig. 2B, Fig. 3, Fig. 4A, Fig. 4B.

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# Claim Language Citations to Prior Art 

Gramstad 2011, at 7:59-8:7, 8:18-24, 8:28-54, 8:64-9:17, 9:26-10:19, 

10:34-37. 

Grigar 1987, at 1:61-66, 3:36-45, 4:11-25, 6:5-7, 6:30-37, Fig. 2. 

Hassel 2009, at Abstract, 1:21-2:19, 2:64-3:6, 3:58-67, 4:21-67, 5:12-6:3, 

6:19-40, 6:66-7:3, 7:16-8:3, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6A, 

Fig. 6B, Fig. 6C. 

Herr 2006, at 12:12-22, 12:35-42, 12:59-66, 25:52-56, Fig. 3, Fig. 4. 

Hinrichs 2004, at Abstract, 1:11-22, 1:55-67, 2:36-3:12, 3:15-30, 3:46-48, 

4:25-41, 6:16-7:25, 7:60-8:45, 9:8-55, 10:42-53, Fig. 1, Fig. 2, Fig. 3, Fig. 

4, Fig. 5, Fig. 6, Fig. 7, Fig. 8. 

Jackson 2010, at Abstract, 1:65-2:34, 3:5-4:6, Fig. 1, Fig. 2, Fig. 3, Fig. 4, 

Fig. 5, Fig. 6, Fig. 7, Fig. 8. 

Jeffree 1999, at Abstract, 1:49-63, 2:1-6, 2:35-56, 3:31-56, 4:6-33, 4:39-

45, 4:63-5:48, 6:11-51, Fig. 4, Fig. 5, Fig. 6. 

Jenkins 1971, at 1:71-2:1, 2:55-69, 3:10-27, 4:5-10, 4:32-37, Fig. 1. 

Keller 2011, at 7:40-42, 8:23-43, Fig. 1, Fig. 2A, Fig. 2B, Fig. 3. 

Lustig 1987, at Abstract, 1:52-59, 2:47-64, 3:25-41, 3:53-55, 3:61-68, 

4:48-67, Fig. 1, Fig. 2. 

Luther 1951, at 2:6-25, 2:55-3:10, Fig. 1, Fig. 2, Fig. 3. 

Magnum Oil Tools 2011. 

Magnum Oil Tools 2012, at 1-2. 

Otis 1932, at 1:45-102, 2:14-77, Fig. 1, Fig. 2, Fig. 6. 

Owen Oil Tools 2004, at 1-3. 

Petrowsky 2013, at ¶ [0011]. 

Phi 2008, at ¶¶ [0017], [0036], [0047-50]; Figs. 2, 6-7. 

Rogers 1998, at 8:52-9:16. 

Rogers 2011, at 3-4, 11; Fig. 13. 

Ross 2009, at ¶¶ [0002], [0011], [0019]. 

Shaker 2004, at 1, 3, 5-6. 

Sherman 2010, at ¶ [0033]. 

Slack 2009, at [0005]. 

Snider 1996, at 6:21-63; Fig. 3.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 10 of 41
10 

# Claim Language Citations to Prior Art 

Sollesnes 2003, at ¶ [0011]. 

Sundholm 2010, at 3:16-4-2. 

500x300 TDO-PO Plug, at 1, 3, 5, 6, 9. 

572x375 TDO-PO Plug, at 1, 3, 6, 10, 11. 

TCO PGR2020-00078, at 52-55. 

Wesson 1987, at 1:6-33; 2:56-31.

1.3 wherein the rupture disc is configured to 

rupture when exposed to a rupturing force 

greater than the rupture burst pressure and 

Al-Anazi, at Abstract, Figs. 1-4, 1:6-8; 1:12-19; 1:36-54; 1:58-64; 2:3-22; 

2:28-34; 2:46-63; 3:3-9; 3:17-4:63; 5:3-7:40. 

Allen 1997, at 46-47. 

Brandsdal 2009, at 7:7-31; Figs. 3, 4. 

DeGood 1985, at 4:53-6:38. 

Degraaf 1991, at 3:9-31. 

Deily 1956, at 2:63-3-3; Fig. 1. 

Edwards 1974, at 3:27-4:21. 

Entchev 2017, at 4:56-5:3, 6:18-35, 10:25-27, 18:6-36, 21:47-57, Fig. 10, 

Fig. 11. 

Ervin 2014, at Abstract, 2:38-52, 3:11-30, 4:6-12, 9:44-50, 9:59-67, Fig. 

1, Fig. 2. 

Farrar 1881, at 2:16-34, 2:37-57, 2:53-73, Fig. 1, Fig. 2, Fig. 3. 

Farwell 1991, at Abstract, 1:13-23, 2:10-22, 3:19-44, 3:59-67, 6:42-56, 

7:50-8:12, Fig. 1, Fig. 2. 

Frazier 1999, at Abstract, 1:23-42, 2:11-37, 2:48-64, 3:40-47, 3:65-4:15, 

4:30-5:17, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7. 

Frazier 2007, at 4:44-50, 6:5-15. 

Frazier 2010, at 12:31-40. 

Frazier 2014, at 3:47-4:8, 5:6-31, 7:24-55, 8:54-10:5, Fig. 1, Fig. 4, Fig. 6, 

Fig. 7, Fig. 8, Fig. 9, Fig. 10, Fig. 11, Fig. 12, Fig. 13. 

Frazier 2015, at Abstract, 2:25-41, 4:28-34, 8:60-67, 11:46-12:28, 12:57-

13:14, 13:29-49, Fig. 2A, Fig. 2B, Fig. 3, Fig. 6, Fig. 7. 

Freiheit 2002, at 5:21-6:55, 8:3-6, Fig. 2, Fig. 3, Fig. 4, Fig. 5. 

Friend 2003, at Abstract, 1:30-2:2, 2:15-25, 6:29-7:4, 9:15-17, 14-19, Fig. 

2, Fig. 3, Fig. 4, Fig. 15. Fig. 16.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 11 of 41
11 

# Claim Language Citations to Prior Art 

Gano 1996, at 2:32-50, 2:61-3:3, 3:11-14, 3:43-52, 4:6-35, 5:32-35, 5:38-

42, 5:44-50, 7:57-8:14, 8:62-9:19, 10:44-46, 11:29-31, 12:40-64, Fig. 2C, 

Fig. 3. 

Gano 1997, at 1:37-42, 4:32-5:7. 

George 2011, at 6:42-64, 7:48-57, 8:40-45, 9:16-21, 10:4-10:10. 

Glass 2002, at Abstract, 1:9-12, 2:9-57, 2:59-4:2, 4:44-51, 6:4-6, 6:14-18, 

6:33-40, 6:45-65, Fig. 1, Fig. 2, Fig. 4, Fig. 5. 

Glass 2003, at Abstract, 6:23-57. 

Gramstad 2009, at Abstract, 1:13-2:4, 2:15-50, 4:21-32, 5:6-6:30, 6:58-

7:10, 7:27-32, 8:4-6, 8:24-53, Fig. 1A, Fig. 1B, Fig. 2A, Fig. 2B, Fig. 3, 

Fig. 4A, Fig. 4B. 

Gramstad 2011, at 7:59-8:7, 8:18-24, 8:28-44, 9:10-17, 10:1-14. 

Grigar 1987, at 1:61-66, 3:36-45, 4:11-25, 6:5-7, 6:30-37, Fig. 2. 

Hassel 2009, at Abstract, 1:46-60, 4:21-67, 6:1-3, 6:66-7:3, Fig. 7. 

Herr 2006, at 12:12-22, 12:35-42, 12:59-66, 13:20-43, 25:52-56, Fig. 3, 

Fig. 4. 

Hinrichs 2004, at Abstract, 1:41-54, 2:36-48, 3:19-24, 3:19-30, 6:16-7:25, 

7:60-8:45, 9:8-55, 10:42-53, Fig. 2, Fig. 3, Fig. 4. 

Jeffree 1999, at Abstract, 1:49-63, 2:1-6, 2:42-49, 3:46-50, 4:6-33, 5:30-

33, 6:15-19, 6:44-51. 

Jenkins 1971, at 2:55-62, 3:10-27, 4:5-10, 4:32-37. 

Lustig 1987, at Abstract, 1:52-59, 3:25-41, 3:53-55, 3:61-68. 

Luther 1951, 2:55-3:10. 

Magnum Oil Tools 2011. 

Magnum Oil Tools 2012, at 1-2. 

Otis 1932, at 1:45-102, 2:14-77, Fig. 1, Fig. 2, Fig. 6. 

Owen Oil Tools 2004, at 1-3. 

Petrowsky 2013, at ¶ [0011]. 

Phi 2008, at ¶¶ [0017], [0036], [0047]-[0050]; Figs. 2, 6-7. 

Rogers 2011, at 3-4, 11; Fig. 13. 

Ross 2009, at ¶ [0013]. 

Shaker 2004, at 1, 3, 5-6.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 12 of 41
12 

# Claim Language Citations to Prior Art 

Sherman 2010, at ¶ [0033]. 

Slack 2009, at [0005]. 

Snider 1996, at 6:21-63; Fig. 3. 

Sollesnes 2003, at ¶¶ [0011], [0026]-[0030]; Fig. 3. 

Sproul 1989, at 2:50-55. 

Stokes 2011, at 2:3-54; Figs. 7-8. 

Streich 2002, at 5:20-43; Figs. 5-6. 

Sundholm 2010, at 3:16-4-2. 

500x300 TDO-PO Plug, at 5, 9, 10. 

572x375 TDO-PO Plug, at 3, 10, 12. 

TCO PGR2020-00078, at 55-58. 

Wesson 1987, at 1:6-33; 2:56-31.

1.4 the region of the tubular member where the 

rupture disc is attached has a larger internal 

diameter than the internal diameter of the 

casing string and is parallel to the internal 

diameter of the casing string. 

Al-Anazi, at Figs. 1-2; 2:31-32; 2:50-3:26. 

Brandsdal 2009, at 7:7-31; Figs. 3, 4. 

Degraaf 1991, at 3:9-31. 

Entchev 2017, at 6:18-35, 10:25-27, 13:10-26, 14:3-12, 15:32-44, 16:54-

17:18, 18:6-36, 22:3-11, Fig. 3B, Fig. 5A. 

Ervin 2014, at 9:33-50, Fig. 2, Fig. 9. 

Farrar 1881, at 2:37-40, Fig. 1. 

Farwell 1991, at Abstract, 1:13-23, 2:10-22, 3:19-44, 3:59-67, 6:42-56, 

7:50-8:12, Fig. 1, Fig. 2. 

Frazier 1999, at Abstract, 1:23-42, 2:11-37, 2:48-64, 3:40-47, 3:65-4:15, 

4:30-5:17, Fig. 1, Fig. 6, Fig. 7. 

Frazier 2007, at 7:50-61, 8:19-50, Fig. 3, Fig. 4. 

Frazier 2014, at Fig. 1, Fig. 4, Fig. 8, Fig. 9, Fig. 10, Fig. 11, Fig. 12, Fig. 

13. 

Frazier 2015, at 8:26-29, 11:46-64, Fig. 6, Fig. 7. 

Freiheit 2002, at Fig. 1B. 

Friend 2003, at 5:10-24; 17, Fig. 2, Fig. 3, Fig. 4, Fig. 15. Fig. 16. 

Gano 1996, at 2:32-50, 8:30-32, Fig. 2A-2C, Fig. 3. 

Gano 1997, at Figs. 1-4. 

Glass 2002, at 4:11-27, 4:40-44, Fig. 3.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 13 of 41
13 

# Claim Language Citations to Prior Art 

Gramstad 2009, at 1:33-36, Fig. 4A, Fig. 4B. 

Grigar 1987, at Fig. 2. 

Hassel 2009, at 3:61-64, 3:58-67, 6:41-47, Fig. 1, Fig. 2, Fig. 3, Fig. 4, 

Fig. 5, Fig. 6A, Fig. 6B, Fig. 6C. 

Hinrichs 2004, at 4:25-31, Fig. 2, Fig. 3, Fig. 4. 

Jackson 2010, at Fig. 2, Fig. 3, Fig. 6, Fig. 7. 

Jeffree 1999, at Fig. 4. 

Jenkins 1971, at 2:25-26, Fig. 1. 

Luther 1951, at 2:6-3, Fig. 1, Fig. 2, Fig. 3. 

Magnum Oil Tools 2011. 

Magnum Oil Tools 2012, at 1-2. 

Otis 1932, at 1:45-62, 2:65-77, Fig. 1, Fig. 2, Fig. 6. 

Owen Oil Tools 2004, at 1-3. 

Petrowsky 2013, at ¶ [0016]. 

Phi 2008, at ¶¶ [0047-50]; Figs. 4, 6. 

Ross 2009, at Figs. 1-2. 

Sherman 2010, at ¶ [0033]. 

Slack 2009, at [0005]. 

Snider 1996, at 6:21-63; Fig. 3. 

Sollesnes 2003, at [0026]; Fig. 3. 

Sproul 1989, at 2:50-55; 6:16-33; Figs. 1-3. 

500x300 TDO-PO Plug, at 1, 5. 

572x375 TDO-PO Plug, at 1, 3. 

TCO PGR2020-00078, at 58-60.

8. The float tool recited in claim 1 wherein the 

rupture disc forms an upper seal of a sealed 

chamber. 

Al-Anazi, at Fig. 2; 3:17-4:64. 

Allen 1997, at 46-47. 

Brandsdal 2009, at 7:7-31; Figs. 3, 4. 

DeGood 1985, at 4:53-6:38. 

Echolas 1993, at 2:65-3:41. 

Ervin 2014, at Abstract, 2:38-52, 3:11-30, 4:6-12, 9:33-67, Fig. 1, Fig. 2, 

Fig. 3, Fig. 4, Fig. 5, Fig. 9, Fig. 10, Fig. 11. 

Farrar 1881, at 2:16-34, 2:37-57, 2:53-73, Fig. 1, Fig. 2, Fig. 3.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 14 of 41
14 

# Claim Language Citations to Prior Art 

Farwell 1991, at Abstract, 1:13-23, 2:10-22, 3:19-44, 3:59-67, 6:42-56, 

7:50-8:12, Fig. 1, Fig. 2. 

Frazier 1999, at Abstract, 1:23-42, 2:11-37, 2:48-64, 3:40-47, 3:65-4:15, 

4:30-5:17, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7. 

Frazier 2007, at 4:44-50, 6:5-15, 7:12-21, 7:32-42, Fig. 1, Fig. 2, Fig. 3, 

Fig. 4, Fig. 5, Fig. 6, Fig. 7. 

Frazier 2010, at 9:27-34, 11:20-25, 12:8-11, Fig. 1, Fig. 2, Fig. 5, Fig. 6. 

Frazier 2015, at 11:56-60, 11:65-12:5, 12:19-28, 13:23-26, Fig. 6, Fig. 7. 

Freiheit 2002, at Abstract, 3:31-44, 3:50-59, 4:11-50, 5:21-6:55, 7:17-26, 

7:45-8:38, Fig. 1B, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6. 

Friend 2003, at 1:30-2:2, 2:15-25, 6:29-7:4, 9:7-17, 14, 17, Fig. 3, Fig. 4. 

Gano 1996, at 2:32-50, 5:44-50, 7:48-56, 8:31-41, 10:42-43, 11:12-15, 

Fig. 2B, Fig. 3. 

Gano 1997, at 1:37-42, 3:18-26, 3:32-40, 4:32-5:7, Figs. 1-4. 

George 2011, at 4:6-18, 4:30-44, 5:9-19, 6:65-7:57, 7:64-12:11, Fig. 1, 

Fig. 2, Fig. 3. 

Glass, at 4:44-63, 6:14-18, 6:48-52, Fig. 3. 

Glass 2003, at Abstract, 6:23-57. 

Gramstad 2009, at Abstract, 1:13-2:4, 2:8-24, 3:11-53, 6:48-57, 7:42-48, 

8:41-53, Fig. 1A, Fig. 1B, Fig. 2A, Fig. 2B, Fig. 3, Fig. 4A, Fig. 4B. 

Grigar 1987, at 1:61-66, 3:36-45, 4:11-58, 6:5-7, 6:30-37, Fig. 1, Fig. 2. 

Hassel 2009, at 4:15-19, 5:12-6:3, 6:19-37, 6:55-60, 7:16-8:3, Fig. 1, Fig. 

2, Fig. 3, Fig. 4, Fig. 5, Fig. 6A, Fig. 6B, Fig. 6C. 

Herr 2006, at 12:12-22, 12:35-42, 12:59-66, 25:52-56, Fig. 3, Fig. 4. 

Jackson 2010, at 4:23-35, 4:55-5:5, Fig. 2, Fig. 3, Fig. 6, Fig. 7. 

Jeffree 1999, at Abstract, 1:49-63, 2:1-6, 2:35-56, 3:31-56, 4:39-45, Fig. 

4, 4:63-5:48, 6:11-51, Fig. 5, Fig. 6. 

Keller 2011, at 7:40-42, 8:23-43, 10:24-25, Fig. 1, Fig. 2A, Fig. 2B, Fig. 

3. 

Lustig 1987, at Abstract, 1:52-59, 2:47-64, 3:25-41, 3:53-55, 3:61-68, 

4:48-67, Fig. 1, Fig. 2. 

Luther 1951, at 1:1-9, Fig. 1, Fig. 2, Fig. 3.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 15 of 41
15 

# Claim Language Citations to Prior Art 

Magnum Oil Tools 2011. 

Magnum Oil Tools 2012, at 1-2. 

Mueller 1992, at 3:36-51, 4:56-5:15, 8:34-49, Figs. 3A-F. 

Otis 1932, at 1:45-102, 2:14-77, Fig. 1, Fig. 2, Fig. 6. 

Owen Oil Tools 2004, at 1-3. 

Rogers 1998, at 8:52-9:16. 

Ross 2009, at ¶¶ [0013], [0018-19]. 

Slack 2009, at [0005], [0015]. 

Snider 1996, at 6:21-63; Fig. 3. 

Sollesnes 2003, at ¶¶ [0011], [0026]-[0030]; Fig. 3. 

Sproul 1989, at 2:50-55; 6:16-33; Figs. 1-3. 

Sundholm 2010, at 3:16-4-2. 

500x300 TDO-PO Plug, at 3, 5. 

572x375 TDO-PO Plug, at 3, 6.

14. The float tool recited in claim 8 further 

comprising a lower seal on the sealed 

chamber 

Al-Anazi, at Fig. 2; 3:17-4:64. 

Allen 1997, at 46-47. 

DeGood 1985, at 4:53-6:38. 

Ervin 2014, at Abstract, 2:38-52, 3:11-30, 4:6-12, 9:33-67, Fig. 1, Fig. 2, 

Fig. 3, Fig. 4, Fig. 5, Fig. 9, Fig. 10, Fig. 11. 

Frazier 1999, at Abstract, 1:23-42, 2:11-37, 2:48-64, 3:40-47, 3:65-4:15, 

4:30-5:17, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7. 

Frazier 2007, at 4:44-50, 6:5-15, 7:12-21, 7:32-42, Fig. 1, Fig. 2, Fig. 3, 

Fig. 4, Fig. 5, Fig. 6, Fig. 7. 

Frazier 2015, at 11:11:60-64, 12:6-18, 12:19-28, 13:23-26, Fig. 6, Fig. 7. 

Freiheit 2002, at Abstract, 3:31-44, 3:50-59, 4:11-50, 5:21-6:55, 7:17-26, 

7:45-8:38, Fig. 1B, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6. 

Friend 2003, at 1:30-2:2, 2:15-25, 6:29-7:4, 9:7-17, 14, 17, Fig. 3, Fig. 4. 

Gano 1996, at 2:32-50, 5:44-50, 8:31-41, 10:42-43, 11:12-15, Fig. 2B, 

Fig. 3. 

Gano 1997, at 1:37-42, 3:18-26, 3:32-40, 4:32-5:7, Figs. 1-4. 

George 2011, at 4:6-18, 4:30-44, 5:9-19, 6:65-7:57, 7:64-12:11, Fig. 1, 

Fig. 2, Fig. 3.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 16 of 41
16 

# Claim Language Citations to Prior Art 

Glass, at 4:44-63, 6:14-18, 6:48-52, Fig. 3. 

Glass 2003, at Abstract, 6:23-57. 

Gramstad 2009, at Abstract, 1:13-2:4, 2:8-24, 3:11-53, 6:48-57, 7:42-48, 

8:41-53, Fig. 1A, Fig. 1B, Fig. 2A, Fig. 2B, Fig. 3, Fig. 4A, Fig. 4B. 

Grigar 1987, at 1:61-66, 3:36-45, 4:11-58, 6:5-7, 6:30-37, Fig. 1, Fig. 2. 

Hassel 2009, at 4:15-19, 5:12-6:3, 6:19-37, 6:55-60, 7:16-8:3, Fig. 1, Fig. 

2, Fig. 3, Fig. 4, Fig. 5, Fig. 6A, Fig. 6B, Fig. 6C. 

Herr 2006, at 12:12-22, 12:35-42, 12:59-66, 25:52-56, Fig. 3, Fig. 4. 

Hinrichs 2004, at Abstract, 1:41-54, 2:5-19, 3:15-30, 3:46-48, 4:6-31, 

6:35-46, 7:60-8:45, 9:8-55, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 8. 

Jackson 2010, at 4:23-35, 4:55-5:5, Fig. 2, Fig. 3, Fig. 6, Fig. 7. 

Jeffree 1999, at Abstract, 1:49-63, 2:1-6, 2:35-56, 3:31-56, 4:39-45, 4:63-

5:48, 6:11-51, Fig. 4, Fig. 5, Fig. 6. 

Keller 2011, at 7:40-42, 8:23-43, 10:24-25, Fig. 1, Fig. 2A, Fig. 2B, Fig. 

3. 

Lustig 1987, at Abstract, 1:52-59, 2:47-64, 3:25-41, 3:53-55, 3:61-68, 

4:48-67, Fig. 1, Fig. 2. 

Luther 1951, at 1:1-9, Fig. 1, Fig. 2, Fig. 3. 

Otis 1932, at 1:45-102, 2:14-77, Fig. 1, Fig. 2, Fig. 6. 

Mueller 1992, at 3:36-51, 4:56-5:15, 8:34-49, Figs. 3A-F. 

Rogers 1998, at 4:42-5:25; 8:52-9:16. 

Ross 2009, at ¶¶ [0013], [0018]-[0019]. 

Snider 1996, at 6:21-63; Fig. 3. 

Sollesnes 2003, at ¶¶ [0011], [0026]-[0030]; Fig. 3. 

Sproul 1989, at 2:50-55; 6:16-33; Figs. 1-3. 

500x300 TDO-PO Plug, at 5, 13. 

572x375 TDO-PO Plug, at 6, 7.

15. The float tool recited in claim 14 wherein the 

lower seal is within a float shoe. 

Allen 1997, at 46-47. 

Ervin 2014, at 10:1-17, Fig. 1, Fig. 2, Fig. 3. 

Keller 2011, at 7:40-42, 8:23-43, 10:24-25, Fig. 1, Fig. 2, Fig. 3. 

Mueller 1992, at 3:36-51, 4:56-5:15, 8:34-49, Fig. 1, Fig. 2, Figs. 3A-F. 

Petrowsky 2013, at ¶ [0013].

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 17 of 41
17 

# Claim Language Citations to Prior Art 

Rogers 1998, at 4:42-64. 

Ross 2009, at ¶¶ [0034], [0037].

22.0 A method for installing casing in a wellbore 

containing a well fluid and having an upper 

vertical portion, a lower horizontal portion, 

and a bend portion connecting the upper and 

lower portions, the method comprising: 

Al-Anazi, at Abstract, Fig. 1; 1:6-8, 1:12-19; 1:42-53; 1:58-2:23; 2:28-30; 

2:46-64. 

Allen 1997, at 46-47. 

Dawson 2003, at 4:10-41; Fig. 1. 

Farwell 1991, at Abstract, 2:10-22, 3:48-58, 6:42-56, 7:50-8:12, Fig. 1. 

Frazier 1999, at Abstract, 1:23-42, 2:11-24, 3:65-4:15, 4:30-5:17, Fig. 1, 

Fig. 6, Fig. 7. 

Frazier 2007, at 3:38-52, 4:62-5:5, Fig. 1, Fig. 2. 

Frazier 2010, at 3:53-4:3, 4:37-43, 11:30-46, Fig. 1, Fig. 2, Fig. 6, Fig. 9. 

Frazier 2014, at Abstract, 3:22-34, 4:22-49, Fig. 1, Fig. 3, Fig. 4, Fig. 7, 

Fig. 8, Fig. 9, Fig. 11, Fig. 12, Fig. 13. 

Frazier 2015, at Abstract, 2:25-41, 10:11-23, 11:46-53, 12:57-64, Fig. 6, 

Fig. 7. 

Freiheit 2002, at Abstract, 3:31-44, 6:56-7:10, 7:45-8:6, Fig. 1B, Fig. 4, 

Fig. 5, Fig. 6. 

Friend 2003, at Fig. 1, 3:5-3, 4:27-30. 

Gano 1996, at 7:36-46, 8:56-51, 11:35-44, 12:40-64, Fig. 2A, Fig. 3. 

Gano 1997, at 1:37-42, 2:41-48, 3:18-26, 3:32-40, 4:32-5:7, Figs. 1-4. 

George 2011, at 4:63-65, 7:64-12:11, Fig. 1, Fig. 2, Fig. 3. 

Glass 2002, at Abstract, 1:9-2:57, 4:16-34, 6:14-18, 6:48-52, Fig. 3. 

Gramstad 2009, at Abstract, 1:5-9, 1:13-2:4, 2:8-14, 3:19-22, 3:30-34, 

6:48-57, 8:41-53, Fig. 1A, Fig. 1B, Fig. 2A, Fig. 2B, Fig. 3, Fig. 4A, Fig. 

4B. 

Gramstad 2011, at 7:59-62, 8:25-27, 9:1-16, 9:33-10:10. 

Grigar 1987, at 1:58-66, 2:27-3:45, 4:11-41, 5:47-6:19, Fig. 1, Fig. 2. 

Hinrichs 2004, at Abstract, Abstract, 1:11-15, 1:30-33, 2:1-19, 3:15-24, 

3:57-4:5, 6:35-46, 7:60-8:45, 9:8-55, Fig. 1, Fig. 2, Fig. 3, Fig. 4. 

Jackson 2010, at Abstract, 1:65-2:34, 2:63-3:2, Fig. 1, Fig. 2, Fig. 3, Fig. 

4, Fig. 5, Fig. 6, Fig. 7, Fig. 8.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 18 of 41
18 

# Claim Language Citations to Prior Art 

Jeffree 1999, at Abstract, 1:26-32, 2:27-34, 3:15-30, 4:6-33, 4:39-45, 

4:62-5:48, 6:20-51, Fig. 1, Fig. 2. 

Keller 2011, at Abstract, 4:7-31, 6:3-20, 7:31-58, 9:25-43, Fig. 1, Fig. 2A, 

Fig. 2B, Fig. 3. 

Luther 1951, at 1:1-9, 1:50-2:5, Fig. 1, Fig. 2, Fig. 3. 

Otis 1932, at 1:33-44, Fig. 1, Fig. 2. 

Mueller 1992, at 3:18-4:29, 4:56-5:15, 5:59-6:4, 8:34-49, Fig. 1, Fig. 2, 

Figs. 3A-F, Fig. 4. 

Petrowsky 2013, at ¶¶ [0013], [0018]. 

Phi 2008, at ¶¶ [0013]-[0015]; Figs. 2, 6-7. 

Rogers 1998, at 4:18-38. 

Rogers 2011, at 3-4, 11; Fig. 13. 

Sherman 2010, at ¶¶ [0018], [0033].

22.1.a running a casing string into the wellbore, the 

casing string having an internal diameter that 

defines a fluid passageway between an upper 

portion of the casing string and a lower 

portion of the casing string, 

Al-Anazi, at Abstract, Fig. 1; 1:6-8, 1:12-19; 1:42-53; 1:58-2:23; 2:28-30; 

2:46-64. 

Allen 1997, at 46-47. 

Brandsdal 2009, at 7:7-31; Figs. 3, 4. 

Ervin 2014, at Abstract, 2:38-52, 3:11-30, 8:46-9:13, Fig. 1, Fig. 2, Fig. 3, 

Fig. 4, Fig. 5, Fig. 9. 

Farrar 1881, at 2:16-40, Fig. 1, Fig. 2, Fig. 3. 

Farwell 1991, at Abstract, 2:10-22, 3:16-19, 3:48-58, 6:42-56, 7:50-8:12, 

Fig. 1, Fig. 2. 

Frazier 1999, at Abstract, 1:23-42, 2:11-37, 3:65-4:15, 4:30-5:17, Fig. 1, 

Fig. 6, Fig. 7. 

Frazier 2007, at 3:38-52, 4:62-5:5, Fig. 1, Fig. 2. 

Frazier 2010, at 3:53-4:3, 4:37-43, 11:30-46, Fig. 1, Fig. 2, Fig. 6, Fig. 9. 

Frazier 2014, at Abstract, 3:22-34, 4:22-49, Fig. 1, Fig. 3, Fig. 4, Fig. 7, 

Fig. 8, Fig. 9, Fig. 11, Fig. 12, Fig. 13. 

Frazier 2015, at Abstract, 2:25-41, 10:11-23, 11:46-53, 12:57-64, Fig. 6, 

Fig. 7. 

Freiheit 2002, at Abstract, 3:31-44, 6:56-7:10, 7:45-8:6, Fig. 1B, Fig. 4, 

Fig. 5, Fig. 6.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 19 of 41
19 

# Claim Language Citations to Prior Art 

Friend 2003, at Abstract, 1:9-17, 1:28-32, 2:13-18, 4:31-34, 9:4-6, 14, 16-

17, Fig. 1, Fig. 3, Fig. 4. 

Gano 1996, at Abstract, 3:4-9, 3:43-52, 6:46-57, 7:36-46, 8:27-55, 9:32-

43, 11:35-44, 12:40-64, Fig. 2A, Fig. 3, Fig. 4, Fig. 5. 

Gano 1997, at 1:37-42, 2:41-48, 3:18-26, 3:32-40, 4:32-5:7, Figs. 1-4. 

George 2011, at 4:63-65, 7:64-12:11, Fig. 1, Fig. 2, Fig. 3. 

Glass 2002, at Abstract, 1:9-2:57, 4:16-34, 6:14-18, 6:48-52, Fig. 3. 

Gramstad 2009, at Abstract, 1:5-9, 1:13-2:4, 2:8-14, 3:19-22, 3:30-34, 

6:48-57, 8:41-53, Fig. 1A, Fig. 1B, Fig. 2A, Fig. 2B, Fig. 3, Fig. 4A, Fig. 

4B. 

Gramstad 2011, at 7:59-62, 8:25-27, 9:1-16, 9:33-10:10. 

Grigar 1987, at 1:58-66, 3:8-24, 4:11-41, Fig. 1, Fig. 2. 

Hassel 2009, at Abstract, 2:60-61, 4:15-19, Fig. 1, Fig. 2, Fig. 3, Fig. 4, 

Fig. 5, Fig. 6A, Fig. 6B, Fig. 6C. 

Hinrichs 2004, at Abstract, Abstract, 1:11-15, 1:30-33, 2:1-19, 3:15-24, 

3:57-4:5, 6:35-46, 7:60-8:45, 9:8-55, Fig. 1, Fig. 2, Fig. 3, Fig. 4. 

Jackson 2010, at Abstract, 1:65-2:34, 2:63-3:2, Fig. 1, Fig. 2, Fig. 3, Fig. 

4, Fig. 5, Fig. 6, Fig. 7, Fig. 8. 

Jeffree 1999, at Abstract, 1:26-32, 2:27-34, 3:15-30, 4:6-33, 4:39-45, 

4:62-5:48, 6:20-51, Fig. 1, Fig. 2. 

Jenkins 1971, at 1:38-53, 2:63-3:30, 3:42-4:4, 4:11-31, Fig. 1. 

Keller 2011, at Abstract, 4:7-31, 6:3-20, 7:31-58, 9:25-43, Fig. 1, Fig. 2A, 

Fig. 2B, Fig. 3. 

Lustig 1987, at Abstract, 2:5-26, 1:52-59, 2:47-64, 3:25-41, 3:53-55, 

3:61-68, 4:48-67, Fig. 1, Fig. 2. 

Luther 1951, at 1:50-2:5, Fig. 1, Fig. 2, Fig. 3. 

Otis 1932, at 1:33-44, 2:65-77, Fig. 1, Fig. 2. 

Mueller 1992, at 3:18-4:29, 4:56-5:15, 5:59-6:4, 8:34-49, Fig. 1, Fig. 2, 

Figs. 3A-F, Fig. 4. 

Phi 2008, at ¶ [0042]. 

Rogers 1998, at 4:39-64. 

Rogers 2011, at 3-4, 11; Fig. 13.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 20 of 41
20 

# Claim Language Citations to Prior Art 

Sherman 2010, at ¶ [0019]. 

Snider 1996, at 6:21-63; Fig. 3.

22.1.b the upper and lower portions of the casing 

string separated by a chamber sealed on one 

end by a rupture disc assembly and on an 

opposing end by a seal, the chamber 

containing a first fluid having a first specific 

gravity 

Al-Anazi, at Abstract, Fig. 1; 1:6-8, 1:12-19; 1:42-53; 1:58-2:23; 2:28-30; 

2:46-64. 

Allen 1997, at 46-47. 

Brandsdal 2009, at 7:7-31; Figs. 3, 4. 

Ervin 2014, at Abstract, 2:38-52, 3:11-30, 4:6-12, 9:33-67, Fig. 1, Fig. 2, 

Fig. 3, Fig. 4, Fig. 5, Fig. 9, Fig. 10, Fig. 11. 

Farrar 1881, at 2:16-34, 2:37-57, 2:53-73, Fig. 1, Fig. 2, Fig. 3. 

Farwell 1991, at Abstract, 1:13-23, 2:10-22, 3:19-44, 3:59-67, 6:42-56, 

7:50-8:12, Fig. 1, Fig. 2. 

Frazier 1999, at Abstract, 1:23-42, 2:11-37, 2:48-64, 3:40-47, 3:65-4:15, 

4:30-5:17, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7. 

Frazier 2007, at 4:44-50, 6:5-15, 7:12-21, 7:32-42, 8:19-56, Fig. 1, Fig. 2, 

Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7. 

Frazier 2010, at 3:53-4:3, 5:51-63, 12:31-40, Fig. 1, Fig. 2, Fig. 3B, Fig. 

4E, Fig. 5, Fig. 6, Fig. 9. 

Frazier 2014, at 3:27-4:21, 4:50-5:7, 5:35-38, 5:44-6:37, 6:66-7:55, 7:56-

8:19, 8:38-10:5, Fig. 1, Fig. 3, Fig. 4, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, 

Fig. 11, Fig. 12, Fig. 13. 

Frazier 2015, at Abstract, 2:25-41, 4:28-34, 11:46-12:28, 12:57-13:14, 

13:29-49, Fig. 2A, Fig. 2B, Fig. 3, Fig. 6, Fig. 7. 

Freiheit 2002, at Abstract, 3:31-44, 3:50-59, 4:11-50, 5:21-6:55, 7:17-26, 

7:45-8:38, Fig. 1B, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6. 

Friend 2003, at Abstract, 1:14-17, 1:32-2:2, 2:13-25, 4:31-34, 6:29-7:4, 

9:4-17, 14-17, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 15. Fig. 16. 

Gano 1996, at 2:32-61, 3:10-16, 3:43-52, 4:6-35, 5:32-35, 5:38-50, 7:47-

56, 8:18-26, 8:31-41, 9:16-19, 11:35-44, 12:40-64, Fig. 2B, Fig. 3. 

Gano 1997, at 1:37-42, 2:33-48, 3:18-26, 3:32-40, 4:11-15, 4:32-5:7, Figs. 

1-4. 

George 2011, at 4:6-18, 4:30-44, 5:9-19, 6:65-7:57, 7:64-12:11, Fig. 1, 

Fig. 2, Fig. 3.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 21 of 41
21 

# Claim Language Citations to Prior Art 

Glass 2002, at Abstract, 1:9-2:57, 4:16-34, 6:14-18, 6:48-52, Fig. 3. 

Gramstad 2009, at Abstract, 1:13-2:4, 2:8-24, 3:11-53, 6:48-57, 7:42-48, 

8:41-53, Fig. 1A, Fig. 1B, Fig. 2A, Fig. 2B, Fig. 3, Fig. 4A, Fig. 4B. 

Gramstad 2011, at 7:59-67, 8:25-40, 9:1-16, 9:33-10:10. 

Grigar 1987, at 1:58-66, 3:8-24, 4:11-41, 5:47-6:19, Fig. 1, Fig. 2. 

Hassel 2009, at Abstract, 1:13-30, 2:60-3:6, 6:19-37, Fig. 1, Fig. 2, Fig. 3, 

Fig. 4, Fig. 5, Fig. 6A, Fig. 6B, Fig. 6C. 

Herr 2006, at 12:12-22, 12:35-42, 12:59-66, 25:52-56, Fig. 3, Fig. 4. 

Hinrichs 2004, at Abstract, 1:11-22, 1:41-67, 2:36-3:12, 3:15-30, 3:46-48, 

4:6-41, 6:16-7:25, 7:60-8:45, 9:8-55, 10:42-53, Fig. 1, Fig. 2, Fig. 3, Fig. 

4, Fig. 5, Fig. 6, Fig. 7, Fig. 8. 

Jackson 2010, at Abstract, 1:60-2:34, 3:5-13, 4:23-35, 4:55-5:5, Fig. 1, 

Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 8. 

Jeffree 1999, at Abstract, 1:49-63, 2:1-6, 2:35-56, 3:31-56, 4:6-33, 4:39-

45, 4:63-5:48, 6:11-51, Fig. 4, Fig. 5, Fig. 6. 

Jenkins 1971, at 1:71-2:1, 2:55-69, 3:10-27, 4:5-10, 4:32-37, Fig. 1. 

Keller 2010, at 7:40-42, 8:23-43, 9:44-47, 9:50-53, 10:24-25, Fig. 1, Fig. 

2A, Fig. 2B, Fig. 3. 

Lustig 1987, at Abstract, 1:52-59, 2:47-64, 3:25-41, 3:53-55, 3:61-68, 

4:48-67, Fig. 1, Fig. 2. 

Luther 1951, at 2:6-25, 2:55-3:10, Fig. 1, Fig. 2, Fig. 3. 

Otis 1932, at 1:45-102, 2:14-77, Fig. 1, Fig. 2, Fig. 6. 

Mueller 1992, at 3:18-4:29, 4:56-5:15, 8:34-49, Fig. 1, Fig. 2, Figs. 3A-F, 

Fig. 4. 

Rogers 1998, at 4:55-5:42. 

Rogers 2011, at 3-4, 11; Fig. 13. 

Snider 1996, at 6:21-63; Fig. 3.

22.2.a wherein the rupture disc assembly comprises 

(i) a tubular member having an upper end and 

a lower end, the upper and lower ends 

connected in-line with the casing string and 

See Limitation 1.1. 

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 22 of 41
22 

# Claim Language Citations to Prior Art 

22.2.b (ii) a rupture disc having a rupture burst 

pressure and in sealing engagement with a 

region of the tubular member within the upper 

and lower ends, 

See Limitation 1.2. 

22.2.c wherein the rupture disc is configured to 

rupture when exposed to a rupturing force 

greater than the rupture burst pressure and 

See Limitation 1.3. 

22.2.d the region of the tubular member where the 

rupture disc is attached has a larger internal 

diameter than the internal diameter of the 

casing string and is parallel to the internal 

diameter of the casing string; and 

See Limitation 1.4. 

22.3 floating at least a portion of the casing string 

containing the sealed chamber in the well 

fluid in the lower horizontal portion of the 

wellbore. 

Allen 1997, at 46-47. 

Frazier 2007, at 4:44-50, 4:62-33, 6:5-15, 7:12-21, 7:32-42, 8:19-56, Fig. 

1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7. 

Frazier 2014, at Abstract, 3:22-34, 4:22-49, Fig. 1, Fig. 3, Fig. 4, Fig. 7, 

Fig. 8, Fig. 9, Fig. 11, Fig. 12, Fig. 13. 

Freiheit 2002, at Abstract, 3:31-44, 6:56-7:10, 7:45-8:6, Fig. 1B, Fig. 4, 

Fig. 5, Fig. 6. 

Gano 1996, at Abstract, 3:4-9, 3:43-52, 7:36-55, 11:39-40, Fig. 2A, Fig. 

2B, Fig. 3. 

Gano 1997, at 1:37-42, 2:33-48, 3:18-26, 3:32-40, 4:32-5:7, Figs. 1-4. 

Keller 2010, at Abstract, 4:7-16, 7:31-49, 8:1-7, 9:27-33, Fig. 1, Fig. 2A, 

Fig. 2B, Fig. 3. 

Mueller 1992, at 3:18-4:29, 4:56-5:15, 5:59-6:4, 8:11-23, 8:34-49, Fig. 1, 

Fig. 2, Figs. 3A-F, Fig. 4. 

Rogers 1998, at 8:52-9:16.

23. The method recited in claim 22 further 

comprising: filling the casing string above the 

rupture disc assembly with a second fluid 

having a second specific gravity higher than 

the first specific gravity. 

Allen 1997, at 46-47. 

Ervin 2014, at 3:52-4:5, Fig. 1, Fig. 2. 

Farwell 1991, at Abstract, 1:13-23, 2:10-22, 3:19-44, 3:59-67, 6:42-56, 

7:50-8:12, Fig. 1, Fig. 2. 

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 23 of 41
23 

# Claim Language Citations to Prior Art 

Frazier 1999, at Abstract, 1:23-42, 2:11-37, 2:48-64, 3:40-47, 3:65-4:15, 

4:30-5:17, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7. 

Frazier 1999, at Abstract, 1:23-42, 2:11-37, 2:48-64, 3:40-47, 3:65-4:15, 

4:30-5:17, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7. 

Frazier 2007, at 4:44-50, 6:5-15, 7:12-21, 7:32-42, 8:19-56, Fig. 1, Fig. 2, 

Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7. 

Frazier 2014, at 3:27-4:21, 4:50-5:7, 5:35-38, 5:44-6:37, 6:66-7:55, 7:56-

8:19, 8:38-10:5, Fig. 1, Fig. 3, Fig. 4, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, 

Fig. 11, Fig. 12, Fig. 13. 

Frazier 2015, at Abstract, 2:25-41, 4:28-34, 11:46-12:28, 12:57-13:14, 

13:29-49, Fig. 2A, Fig. 2B, Fig. 3, Fig. 6, Fig. 7. 

Freiheit 2002, at Abstract, 3:31-44, 3:50-59, 4:11-50, 5:21-6:55, 7:17-26, 

7:45-8:38, Fig. 1B, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6. 

Friend 2003, at Abstract, 1:14-17, 1:32-2:2, 2:13-25, 4:31-34, 6:29-7:4, 

9:4-17, 14-17. 

Gano 1996, at 2:32-61, 2:61-3:3, 3:11-14, 3:43-52, 4:6-35, 5:32-35, 5:38-

42, 5:44-50, 7:57-8:14, 8:56-9:19, 12:40-64, Fig. 2A-C, Fig. 3. 

Gano 1997, at 1:37-42, 2:33-48, 3:18-26, 3:32-40, 4:32-5:7, Figs. 1-4. 

George 2011, at 4:6-18, 4:30-44, 5:9-19, 6:65-7:57, 7:64-12:11, Fig. 1, 

Fig. 2, Fig. 3. 

Glass, at 4:44-63, 6:14-18, 6:48-52, Fig. 3. 

Gramstad 2009, at Abstract, 1:13-2:4, 2:8-24, 3:11-53, 6:48-57, 7:42-48, 

8:41-53, Fig. 1A, Fig. 1B, Fig. 2A, Fig. 2B, Fig. 3, Fig. 4A, Fig. 4B. 

Gramstad 2011, at 7:59-8:7, 8:18-24, 8:28-54, 8:64-9:17, 9:26-10:19, 

10:34-37. 

Grigar 1987, at 1:58-66, 3:8-24, 4:11-41, 5:47-6:19, Fig. 1, Fig. 2. 

Hassel 2009, at 4:15-19, 5:12-6:3, 6:19-37, 6:55-60, 7:16-8:3, Fig. 1, Fig. 

2, Fig. 3, Fig. 4, Fig. 5, Fig. 6A, Fig. 6B, Fig. 6C. 

Hinrichs 2004, at Abstract, 1:11-22, 1:55-67, 2:36-3:12, 3:15-30, 3:46-48, 

4:25-41, 6:16-7:25, 7:60-8:45, 9:8-55, 10:42-53, Fig. 1, Fig. 2, Fig. 3, Fig. 

4, Fig. 5, Fig. 6, Fig. 7, Fig. 8. 

Jackson 2010, at 4:23-35, 4:55-5:5, Fig. 2, Fig. 3, Fig. 6, Fig. 7.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 24 of 41
24 

# Claim Language Citations to Prior Art 

Jeffree 1999, at 1:57-63, 3:26-34, 4:62-6:2. 

Keller 2010, at 7:40-45, 8:1-7, 9:27-33, 9:44-47, 9:50-53, Fig. 1, Fig. 2A, 

Fig. 2B, Fig. 3. 

Otis 1932, at 1:45-102, 2:14-77, Fig. 1, Fig. 2, Fig. 6. 

Mueller 1992 at 6:5-11. 

Rogers 1998, at 8:52-9:16. 

Snider 1996, at 6:21-63; Fig. 3.

24. The method recited in claim 23 wherein the 

first specific gravity is less than a specific 

gravity of the well fluid. 

Allen 1997, at 46-47. 

Ervin 2014, at Abstract, 2:38-52, 3:11-30, 4:6-12, 9:33-67, Fig. 1, Fig. 2, 

Fig. 3, Fig. 4, Fig. 5, Fig. 9, Fig. 10, Fig. 11. 

Farwell 1991, at Abstract, 1:13-23, 2:10-22, 3:19-44, 3:59-67, 6:42-56, 

7:50-8:12, Fig. 1, Fig. 2. 

Frazier 1999, at Abstract, 1:23-42, 2:11-37, 2:48-64, 3:40-47, 3:65-4:15, 

4:30-5:17, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7. 

Frazier 2014, at 3:27-4:21, 4:50-5:7, 5:35-38, 5:44-6:37, 6:66-7:55, 7:56-

8:19, 8:38-10:5, Fig. 1, Fig. 3, Fig. 4, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, 

Fig. 11, Fig. 12, Fig. 13. 

Frazier 2015, at Abstract, 2:25-41, 4:28-34, 11:46-12:28, 12:57-13:14, 

13:29-49, Fig. 2A, Fig. 2B, Fig. 3, Fig. 6, Fig. 7. 

Freiheit 2002, at 4:45-51, 7:8-16. 

Friend 2003, at Abstract, 1:14-17, 1:32-2:2, 2:13-25, 4:32-34, 6:29-7:4, 

9:4-17, 14-17. 

Gano 1996, at 2:32-61, 2:61-3:3, 3:11-14, 3:43-52, 4:6-35, 5:32-35, 5:38-

42, 5:44-50, 7:57-8:14, 8:56-9:19, Fig. 2A-C, Fig. 3. 

Gano 1997, at 1:37-42, 2:33-48, 3:18-26, 3:32-40, 4:32-5:7, Figs. 1-4. 

George 2011, at 4:6-18, 4:30-44, 5:9-19, 6:65-7:57, 7:64-12:11, Fig. 1, 

Fig. 2, Fig. 3. 

Glass, at 4:44-63, 6:14-18, 6:48-52, Fig. 3. 

Gramstad 2009, at Abstract, 1:13-2:4, 2:8-24, 3:11-53, 6:48-57, 7:42-48, 

8:41-53, Fig. 1A, Fig. 1B, Fig. 2A, Fig. 2B, Fig. 3, Fig. 4A, Fig. 4B. 

Gramstad 2011, at 7:59-8:7, 8:18-24, 8:28-54, 8:64-9:17, 9:26-10:19, 

10:34-37.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 25 of 41
25 

# Claim Language Citations to Prior Art 

Grigar 1987, at 1:58-66, 3:8-24, 4:11-41, 5:47-6:19, Fig. 1, Fig. 2. 

Hassel 2009, at 4:15-19, 5:12-6:3, 6:19-37, 6:55-60, 7:16-8:3, Fig. 1, Fig. 

2, Fig. 3, Fig. 4, Fig. 5, Fig. 6A, Fig. 6B, Fig. 6C. 

Hinrichs 2004, at Abstract, 1:11-22, 1:55-67, 2:36-3:12, 3:15-30, 3:46-48, 

4:25-41, 6:16-7:25, 7:60-8:45, 9:8-55, 10:42-53, Fig. 1, Fig. 2, Fig. 3, Fig. 

4, Fig. 5, Fig. 6, Fig. 7, Fig. 8. 

Jackson 2010, at 4:23-35, 4:55-5:5, Fig. 2, Fig. 3, Fig. 6, Fig. 7. 

Jeffree 1999, at 1:57-63, 3:26-34, 4:62-6:2. 

Keller 2010, at 2:14-34, 3:47-49, 7:40-45, 8:1-7, 9:27-33, 9:44-47, 9:50-

53, Fig. 1, Fig. 2A, Fig. 2B, Fig. 3. 

Otis 1932, at 1:45-102, 2:14-77, Fig. 1, Fig. 2, Fig. 6. 

Mueller 1992, at 6:5-45, 8:34-49. 

Rogers 1998, at 8:52-9:16. 

Snider 1996, at 6:21-63; Fig. 3.

25. The method recited in claim 23 wherein the 

first fluid is air. 

Allen 1997, at 46-47. 

Frazier 2014, at 3:27-4:21, 4:50-5:7, 5:35-38, 5:44-6:37, 6:66-7:55, 7:56-

8:19, 8:38-10:5, Fig. 1, Fig. 3, Fig. 4, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, 

Fig. 11, Fig. 12, Fig. 13. 

Frazier 2015, at Abstract, 2:25-41, 4:28-34, 11:46-12:28, 12:57-13:14, 

13:29-49, Fig. 2A, Fig. 2B, Fig. 3, Fig. 6, Fig. 7. 

Freiheit 2002, at 4:45-51, 7:12-16. 

Friend 2003, at Abstract, 1:14-17, 1:32-2:2, 2:13-25, 4:32-34, 6:29-7:4, 

9:4-17, 14-17. 

Gano 1996, at 2:32-61, 2:61-3:3, 3:11-14, 3:43-52, 4:6-35, 5:32-35, 5:38-

42, 5:44-50, 7:57-8:14, 8:56-9:19, Fig. 2A-C, Fig. 3. 

George 2011, at 4:6-18, 4:30-44, 5:9-19, 6:65-7:57, 7:64-12:11, Fig. 1, 

Fig. 2, Fig. 3. 

Glass, at 4:44-63, 6:14-18, 6:48-52, Fig. 3. 

Gramstad 2009, at Abstract, 1:13-2:4, 2:8-24, 3:11-53, 6:48-57, 7:42-48, 

8:41-53, Fig. 1A, Fig. 1B, Fig. 2A, Fig. 2B, Fig. 3, Fig. 4A, Fig. 4B. 

Gramstad 2011, at 7:59-8:7, 8:18-24, 8:28-54, 8:64-9:17, 9:26-10:19, 

10:34-37.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 26 of 41
26 

# Claim Language Citations to Prior Art 

Hinrichs 2004, at Abstract, 1:11-22, 1:55-67, 2:36-3:12, 3:15-30, 3:46-48, 

4:25-41, 6:16-7:25, 7:60-8:45, 9:8-55, 10:42-53, Fig. 1, Fig. 2, Fig. 3, Fig. 

4, Fig. 5, Fig. 6, Fig. 7, Fig. 8. 

Jackson 2010, at 4:23-35, 4:55-5:5, Fig. 2, Fig. 3, Fig. 6, Fig. 7. 

Jeffree 1999, at 1:57-63, 3:26-34, 4:62-6:2. 

Keller 2010, at 2:14-34, 3:47-49, 8:1-7, Fig. 1, Fig. 2A, Fig. 2B. 

Otis 1932, at 1:45-102, 2:14-77, Fig. 1, Fig. 2, Fig. 6. 

Mueller 1992, at 3:36-51, 5:6-15, 8:34-49. 

Rogers 1998, at 1. 

Rogers 1998, at 8:52-9:2. 

Snider 1996, at 6:21-63; Fig. 3.

27. The method recited in claim 22 further 

comprising applying a rupturing force to the 

rupture disc to rupture the rupture disc. 

Allen 1997, at 46-47. 

Ervin 2014, at Abstract, 2:38-52, 3:11-30, 4:6-12, 9:33-67, Fig. 1, Fig. 2, 

Fig. 3, Fig. 4, Fig. 5, Fig. 9, Fig. 10, Fig. 11. 

Friend 2003, at Abstract, 1:30-2:2, 2:15-25, 6:29-7:4, 9:15-17, 14-19. 

Farrar 1881, at 2:16-34, 2:37-57, 2:53-73, Fig. 1, Fig. 2, Fig. 3. 

Farwell 1991, at Abstract, 1:13-23, 2:10-22, 3:19-44, 3:59-67, 6:42-56, 

7:50-8:12, Fig. 1, Fig. 2. 

Frazier 1999, at Abstract, 1:23-42, 2:11-37, 2:48-64, 3:40-47, 3:65-4:15, 

4:30-5:17, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7. 

Frazier 2007, at 4:44-50, 6:5-15, 7:12-21, 7:32-42, 8:19-56, Fig. 1, Fig. 2, 

Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7. 

Frazier 2010, at 12:31-40. 

Frazier 2014, at 3:47-4:8, 5:6-31, 7:24-55, 8:54-10:5, Fig. 1, Fig. 4, Fig. 6, 

Fig. 7, Fig. 8, Fig. 9, Fig. 10, Fig. 11, Fig. 12, Fig. 13. 

Frazier 2015, at Abstract, 2:25-41, 4:28-34, 8:60-67, 11:46-12:28, 12:57-

13:14, 13:29-49, Fig. 2A, Fig. 2B, Fig. 3, Fig. 6, Fig. 7. 

Freiheit 2002, at Abstract, 3:31-44, 3:50-59, 4:11-50, 5:21-6:55, 7:17-26, 

7:45-8:38, Fig. 1B, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6. 

Gano 1996, at 2:32-50, 2:61-3:3, 3:11-14, 3:43-52, 4:6-35, 5:32-35, 5:38-

42, 5:44-50, 7:57-8:14, 8:62-9:19, 11:35-44, 12:40-64, Fig. 2C, Fig. 3. 

Gano 1997, at 1:37-42, 4:32-5:7.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 27 of 41
27 

# Claim Language Citations to Prior Art 

George 2011, at 6:42-64, 7:48-57, 8:40-45, 9:16-21. 

Glass 2002, at Abstract, 1:9-12, 2:9-57, 2:59-4:2, 4:44-51, 6:4-6, 6:14-18, 

6:33-40, 6:45-65, Fig. 1, Fig. 2, Fig. 4, Fig. 5. 

Gramstad 2009, at Abstract, 1:13-2:4, 2:15-50, 4:21-32, 5:6-6:30, 6:58-

7:10, 7:27-32, 8:4-6, 8:24-53, Fig. 1A, Fig. 1B, Fig. 2A, Fig. 2B, Fig. 3, 

Fig. 4A, Fig. 4B. 

Gramstad 2011, at 7:59-8:7, 8:18-24, 8:28-44, 9:10-17, 10:1-14. 

Grigar 1987, at 1:61-66, 3:36-45, 4:11-25, 6:5-7, 6:30-37, Fig. 2. 

Hassel 2009, at Abstract, 1:21-2:19, 2:64-3:6, 3:58-67, 4:21-67, 5:12-6:3, 

6:19-40, 6:66-7:3, 7:16-8:3, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6A, 

Fig. 6B, Fig. 6C. 

Herr 2006, at 12:12-22, 12:35-42, 12:59-66, 25:52-56, Fig. 3, Fig. 4. 

Hinrichs 2004, at Abstract, 1:41-54, 2:36-48, 3:19-24, 3:19-30, 6:16-7:25, 

7:60-8:45, 9:8-55, 10:42-53, Fig. 2, Fig. 3, Fig. 4. 

Jeffree 1999, at Abstract, 1:49-63, 2:1-6, 2:42-49, 3:46-50, 4:6-33, 5:30-

33, 6:15-19, 6:44-51. 

Jenkins 1971, at 2:55-62, 3:10-27, 4:5-10, 4:32-37. 

Lustig 1987, at Abstract, 1:52-59, 3:25-41. 

Luther 1951, at 2:6-25, 2:55-3:10, Fig. 1, Fig. 2, Fig. 3. 

Magnum Oil Tools 2011. 

Magnum Oil Tools 2012, at 1-2. 

Otis 1932, at 1:45-102, 2:14-77, Fig. 1, Fig. 2, Fig. 6 . 

Owen Oil Tools 2004, at 1-3. 

Petrowsky 2013, at ¶ [0011]. 

Rogers 1998, at 6:18-42. 

Snider 1996, at 6:21-63; Fig. 3.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 28 of 41
28 

# Claim Language Citations to Prior Art 

28.0 A float tool configured for use in positioning 

a casing string in a wellbore containing a well 

fluid, the casing string having an internal 

diameter that defines a fluid passageway 

between an upper portion of the casing string 

and a lower portion of the casing string, the 

float tool comprising:

See Limitation 1.0. 

28.1.a a rupture disc assembly comprising (i) a 

tubular member having an upper end and a 

lower end, the upper and lower ends 

configured for connection in-line with the 

casing string and

See Limitation 1.1 

28.1.b (ii) a rupture disc having a rupture burst 

pressure and in sealing engagement with a 

region of the tubular member within the upper 

and lower ends

See Limitation 1.2. 

28.2.a wherein the rupture disc is configured to 

disengage from sealing engagement when 

exposed to a pressure greater than a hydraulic 

pressure in the casing string after the casing 

string has been positioned in the wellbore 

Al-Anazi, at Abstract, Figs. 1-4, 1:6-8; 1:12-19; 1:36-54; 1:58-64; 2:3-22; 

2:28-34; 2:46-63; 3:3-9; 3:17-4:63; 5:3-7:40. 

Entchev 2017, at 6:18-35, 10:37-45, 13:57-14:22, 16:54-17:18, 18:6-36, 

19:11-22, 24:1-23, Fig. 3B, Fig. 4A, Fig. 4B. 

Ervin 2014, at Abstract, 2:38-52, 3:11-30, 4:6-12, 9:33-67, Fig. 1, Fig. 2, 

Fig. 3, Fig. 4, Fig. 5, Fig. 9, Fig. 10, Fig. 11. 

Farwell 1991, at Abstract, 1:13-23, 2:10-22, 3:19-44, 3:59-67, 6:42-56, 

7:50-8:12, Fig. 1, Fig. 2. 

Frazier 2010, at 11:25-28, 12:22-30, Fig. 1, Fig. 2, Fig. 5, Fig. 6. 

Frazier 2014, at 3:27-4:21, 4:50-5:7, 5:35-38, 5:44-6:37, 6:66-7:55, 7:56-

8:19, 8:38-10:5, Fig. 1, Fig. 3, Fig. 4, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, 

Fig. 11, Fig. 12, Fig. 13. 

Frazier 2015, at Abstract, 2:25-41, 8:60-69, 13:39-49, Fig. 6, Fig. 7. 

Friend 2003, at Abstract, 1:30-2:2, 2:15-25, 6:29-7:4, 9:15-17, 14-19, Fig. 

2, Fig. 3, Fig. 4, Fig. 15, Fig. 16.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 29 of 41
29 

# Claim Language Citations to Prior Art 

Freiheit 2002, at Abstract, 3:31-44, 3:50-59, 4:11-50, 5:21-6:55, 7:17-26, 

7:45-8:38, Fig. 1B, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6. 

Gano 1996, at 2:32-50, 2:61-3:3, 3:11-14, 3:43-52, 4:6-35, 5:32-35, 5:38-

42, 5:44-50, 7:15-35, 7:57-8:14, 8:62-9:19, 12:40-64, Fig. 2A-C, Fig. 3. 

Gano 1997, at 1:37-42, 4:32-5:7. 

George 2011, at 4:6-18, 4:30-44, 5:9-19, 6:42-7:57, 7:64-12:11, Fig. 1, 

Fig. 2, Fig. 3. 

Gramstad 2009, at 1:28-52, 2:19-24, 2:30-35, 2:43-50, 4:4-5:20, 6:31-47, 

7:6-26, 7:53-8:2, 8:7-15, 8:20-31, 8:41-53, Fig. 1A, Fig. 1B, Fig. 2A, Fig. 

2B, Fig. 3, Fig. 4A, Fig. 4B. 

Gramstad 2011, at 7:59-7, 8:11-17, 8:25-63, 9:1-25, 10:1-14, 10:20-34, 

10:31-33. 

Hassel 2009, at Abstract, 1:21-2:19, 2:64-3:6, 3:58-67, 4:21-67, 5:12-6:3, 

6:19-40, 6:66-7:3, 7:16-8:3, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6A, 

Fig. 6B, Fig. 6C. 

Hinrichs 2004, at Abstract, 1:41-54, 2:36-48, 3:19-24, 3:19-30, 6:16-7:25, 

7:60-8:45, 9:8-55, 10:42-53, Fig. 2, Fig. 3, Fig. 4. 

Jackson 2010, at Abstract, 1:65-2:34, 3:5-4:6, 5:6-25, 5:66-6:2, Fig. 1, 

Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8. 

Jeffree 1999, at Abstract, 1:49-63, 2:1-6, 2:42-49, 3:46-50, 4:6-33, 5:30-

33, 6:15-19, 6:44-51. 

Lustig 1987, at Abstract, 1:52-59, 2:47-64, 3:25-41, 3:53-55, 3:61-68, 

4:48-67, Fig. 1, Fig. 2. 

Otis 1932, at 1:45-102, 2:14-77, Fig. 1, Fig. 2, Fig. 6. 

Mueller 1992, at 7:65-8:10, 8:50-9:3, 9:31-55, Fig. 1, Fig. 2, Figs. 3A-F, 

Fig. 5. 

Ross 2009, at ¶¶ [0014]-[0015], [0018], [0020]. 

Snider 1996, at 6:21-63; Fig. 3. 

500x300 TDO-PO Plug, at 9, 10. 

572x375 TDO-PO Plug, at 10, 12. 

TCO PGR2020-00078, at 61-63.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 30 of 41
30 

# Claim Language Citations to Prior Art 

28.2.b and the region of the tubular member where 

the rupture disc is attached has a larger 

internal diameter than the internal diameter of 

the casing string and is parallel to the internal 

diameter of the casing string.

See Limitation 1.4 

29.a The float tool recited in claim 28 wherein the 

rupture disc is further configured to rupture 

when exposed to a rupturing force greater 

than the rupture burst pressure and 

See Limitation 1.3. 

29.b the pressure greater than the hydraulic 

pressure is less than the rupture burst 

pressure. 

Ervin 2014, at Abstract, 2:38-52, 3:11-30, 4:6-12, 9:33-67, Fig. 1, Fig. 2, 

Fig. 3, Fig. 4, Fig. 5, Fig. 9, Fig. 10, Fig. 11. 

Frazier 2010, at 11:25-28, 12:22-30, Fig. 1, Fig. 2, Fig. 5, Fig. 6. 

Frazier 2014, at 3:27-4:21, 4:50-5:7, 5:35-38, 5:44-6:37, 6:66-7:55, 7:56-

8:19, 8:38-10:5, Fig. 1, Fig. 3, Fig. 4, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, 

Fig. 11, Fig. 12, Fig. 13. 

Frazier 2015, at Abstract, 2:25-41, 8:60-67, 13:39-49, Fig. 6, Fig. 7. 

Freiheit 2002, at Abstract, 3:31-44, 3:50-59, 4:11-50, 5:21-6:55, 7:17-26, 

7:45-8:38, Fig. 1B, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6. 

Friend 2003, at Abstract, 1:30-2:2, 2:15-25, 6:29-7:4, 9:15-17, 14-19, Fig. 

2, Fig. 3, Fig. 4, Fig. 15, Fig. 16. 

Gano 1996, at 2:32-50, 2:61-3:3, 3:11-14, 3:43-52, 4:6-35, 5:32-35, 5:38-

42, 5:44-50, 7:15-35, 7:57-8:14, 8:62-9:19, 12:40-64, Fig. 2A-C, Fig. 3 

Gano 1997, at 1:37-42, 4:32-5:7. 

George 2011, at 4:6-18, 4:30-44, 5:9-19, 6:42-7:57, 7:64-12:11, Fig. 1, 

Fig. 2, Fig. 3. 

Gramstad 2009, at 1:28-52, 2:19-24, 2:30-35, 2:43-50, 4:4-5:20, 6:31-47, 

7:6-26, 7:53-8:2, 8:7-15, 8:20-31, 8:41-53. 

Gramstad 2011, at 7:59-7, 8:11-17, 8:25-63, 9:1-25, 10:1-14, 10:20-34, 

10:31-33. 

Hassel 2009, at 4:42-44. 

Hinrichs 2004, at Abstract, 1:41-54, 2:36-48, 3:19-24, 3:19-30, 6:16-7:25, 

7:60-8:45, 9:8-55, 10:42-53, Fig. 2, Fig. 3, Fig. 4.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 31 of 41
31 

# Claim Language Citations to Prior Art 

Jackson 2010, at Abstract, 1:65-2:34, 3:5-4:6, 5:6-25, 5:66-6:2, Fig. 1, 

Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8. 

Jeffree 1999, at Abstract, 1:49-63, 2:1-6, 2:42-49, 3:46-50, 4:6-33, 5:30-

33, 6:15-19, 6:44-51. 

Otis 1932, at 1:45-102, 2:14-77, Fig. 1, Fig. 2, Fig. 6. 

Mueller 1992, at 7:65-8:10, 8:50-9:3, 9:31-55, Fig. 1, Fig. 2, Figs. 3A-F, 

Fig. 5. 

Stokes 2011, at 2:3-54; Figs. 7-8. 

TCO PGR2020-00078, at 64-65.

30. The float tool recited in claim 28 wherein the 

wellbore has an upper, substantially vertical 

portion, a lower, substantially horizontal 

portion, and a bend portion connecting the 

upper and lower portions and the float tool is 

configured for use in the casing string such 

that, when the casing string is positioned in 

the wellbore for a cementing operation, the 

rupture disc is located in the upper, 

substantially vertical portion of the wellbore. 

Al-Anazi, at Abstract, Fig. 1.; 2:59-3:14. 

Allen 1997, at 46-47. 

Frazier 2010, at 3:53-4:3, 4:37-43, 11:30-46, Fig. 9. 

Friend 2003, at 1:28-2:2, 3:5-3, 4:27-30, Fig. 1. 

Gano 1996, at Abstract, 1:10-67, 2:15-18, Fig. 2A-C, Fig. 3. 

Gano 1997, at 1:37-42, 2:33-48, 3:18-26, 3:32-40, 4:32-5:7, Figs. 1-4. 

George 2011, at 4:6-18, 4:30-44, 5:9-19, 6:42-7:57, 7:64-12:11, Fig. 1, 

Fig. 2, Fig. 3. 

Glass 2002, at Abstract, 1:9-2:57, 4:16-34, 6:14-18, 6:48-52, Fig. 3. 

Gramstad 2009, at Abstract, 1:5-9, 1:13-2:4, 2:8-14, 3:19-22, 3:30-34, 

6:48-57, 8:41-53, Fig. 1A, Fig. 1B, Fig. 2A, Fig. 2B, Fig. 3, Fig. 4A, Fig. 

4B. 

Keller 2010, at Abstract, 7:31-49, 8:1-14, Fig. 2A, Fig. 2B. 

Mueller 1992, at 2:53-3:47, 4:4-30, 4:57-5:9, 7:28-42, Fig. 1, Fig. 2, Figs. 

3A-F, Fig. 4. 

Sherman 2010, at ¶¶ [0018], [0019]. 

Sproul 1989, at 1:11-23, 2:50-55, 6:16-33; Figs. 1-3.

31. The float tool recited in claim 30 wherein the 

float tool is configured for use in the casing 

string such that, when the casing string is 

positioned in the wellbore for a cementing 

operation, the rupture disc is located 

proximate the bend portion of the wellbore. 

Al-Anazi, at Abstract, Fig. 1.; 2:59-3:14. 

Allen 1997, at 46-47. 

Frazier 2010, at 3:53-4:3, 4:37-43, 11:30-46, Fig. 9. 

Freiheit 2002, at Abstract, 3:31-44, 6:56-7:10, 7:45-8:6, Fig. 1B, Fig. 4, 

Fig. 5, Fig. 6. 

George 2011, at 2:1-17, Fig. 1.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 32 of 41
32 

# Claim Language Citations to Prior Art 

Gramstad 2009, at Abstract, 1:5-9, 1:13-2:4, 2:8-14, 3:19-22, 3:30-34, 

6:48-57, 8:41-53, Fig. 1A, Fig. 1B, Fig. 2A, Fig. 2B, Fig. 3, Fig. 4A, Fig. 

4B. 

Keller 2010, at Abstract, 7:31-49, 8:1-14, Fig. 2A, Fig. 2B. 

Mueller 1992, at 3:18-4:29, 4:56-5:15, 5:59-6:4, 8:34-49, Fig. 1, Fig. 2, 

Figs. 3A-F, Fig. 4. 

Sherman 2010, at ¶ [0020]. 

Sproul 1989, at 1:11-23, 2:50-55, 6:16-33; Figs. 1-3.

36. The float tool recited in claim 28 wherein the 

rupture disc forms an upper seal of a sealed 

chamber. 

See Limitation 8. 

37. The float tool recited in claim 36 wherein the 

sealed chamber is configured for releasably 

containing a fluid having a lower specific 

gravity than that of the well fluid. 

Allen 1997, at 46-47. 

Ervin 2014, at Abstract, 2:38-52, 3:11-30, 4:6-12, 9:33-67, Fig. 1, Fig. 2, 

Fig. 3, Fig. 4, Fig. 5, Fig. 9, Fig. 10, Fig. 11. 

Frazier 2010, at 11:25-28, 12:22-30, Fig. 1, Fig. 2, Fig. 5, Fig. 6. 

Frazier 2014, at 3:27-4:21, 4:50-5:7, 5:35-38, 5:44-6:37, 6:66-7:55, 7:56-

8:19, 8:38-10:5, Fig. 1, Fig. 3, Fig. 4, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, 

Fig. 11, Fig. 12, Fig. 13. 

Frazier 2015, at Abstract, 2:25-41, 4:28-34, 11:46-12:28, 12:57-13:14, 

13:29-49, Fig. 2A, Fig. 2B, Fig. 3, Fig. 6, Fig. 7. 

Freiheit 2002, at Abstract, 3:31-44, 3:50-59, 4:11-50, 5:21-6:55, 7:17-26, 

7:45-8:38, Fig. 1B, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6. 

Friend 2003, at Abstract, 1:30-2:2, 2:15-25, 6:29-7:4, 9:15-17, 14-19, Fig. 

2, Fig. 3, Fig. 4, Fig. 15. Fig. 16. 

Farwell 1991, at Abstract, 1:13-23, 2:10-22, 3:19-44, 3:59-67, 6:42-56, 

7:50-8:12, Fig. 1, Fig. 2. 

Gano 1996, at 2:32-61, 2:61-3:3, 3:11-14, 3:43-52, 4:6-35, 5:32-35, 5:38-

42, 5:44-50, 7:57-8:14, 8:56-9:19, 12:40-64, Fig. 2A-C, Fig. 3. 

Gano 1997, at 1:37-42, 2:33-48, 3:18-26, 3:32-40, 4:32-5:7, Figs. 1-4. 

George 2011, at 4:6-18, 4:30-44, 5:9-19, 6:65-7:57, 7:64-12:11, Fig. 1, 

Fig. 2, Fig. 3. 

Glass, at 4:44-63, 6:14-18, 6:48-52, Fig. 3.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 33 of 41
33 

# Claim Language Citations to Prior Art 

Gramstad 2009, at Abstract, 1:13-2:4, 2:8-24, 3:11-53, 6:48-57, 7:42-48, 

8:41-53, Fig. 1A, Fig. 1B, Fig. 2A, Fig. 2B, Fig. 3, Fig. 4A, Fig. 4B. 

Gramstad 2011, at 7:59-8:7, 8:18-24, 8:28-54, 8:64-9:17, 9:26-10:19, 

10:34-37. 

Grigar 1987, at 1:58-66, 3:8-24, 4:11-41, 5:47-6:19, Fig. 1, Fig. 2. 

Hassel 2009, at 4:15-19, 5:12-6:3, 6:19-37, 6:55-60, 7:16-8:3, Fig. 1, Fig. 

2, Fig. 3, Fig. 4, Fig. 5, Fig. 6A, Fig. 6B, Fig. 6C. 

Hinrichs 2004, at Abstract, 1:11-22, 1:41-67, 2:36-3:12, 3:15-30, 3:46-48, 

4:6-41, 6:16-7:25, 7:60-8:45, 9:8-55, 10:42-53, Fig. 1, Fig. 2, Fig. 3, Fig. 

4. 

Jackson 2010, at Abstract, 1:65-2:34, 3:5-4:6, 5:6-25, 5:66-6:2, Fig. 1, 

Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8. 

Jeffree 1999, at Abstract, 1:49-63, 2:1-6, 2:35-56, 3:26-56, 4:6-33, 4:39-

45, 4:62-6:2, 6:11-51, Fig. 4, Fig. 5, Fig. 6. 

Otis 1932, at 1:45-102, 2:14-77, Fig. 1, Fig. 2, Fig. 6. 

Mueller 1992, at 3:18-4:29, 4:56-5:15, 8:34-49, Fig. 1, Fig. 2, Figs. 3A-F, 

Fig. 4. 

Rogers 1998, at 8:52-9:16. 

Snider 1996, at 6:21-63; Fig. 3.

38. The float tool recited in claim 37 wherein the 

fluid having a lower specific gravity than that 

of the well fluid is released upon 

disengagement of the rupture disc. 

Allen 1997, at 46-47. 

Ervin 2014, at Abstract, 2:38-52, 3:11-30, 4:6-12, 9:33-67, Fig. 1, Fig. 2, 

Fig. 3, Fig. 4, Fig. 5, Fig. 9, Fig. 10, Fig. 11. 

Farwell 1991, at Abstract, 1:13-23, 2:10-22, 3:19-44, 3:59-67, 6:42-56, 

7:50-8:12, Fig. 1, Fig. 2. 

Frazier 2010, at 11:25-28, 12:22-30, Fig. 1, Fig. 2, Fig. 5, Fig. 6 

Frazier 2014, at 3:27-4:21, 4:50-5:7, 5:35-38, 5:44-6:37, 6:66-7:55, 7:56-

8:19, 8:38-10:5, Fig. 1, Fig. 3, Fig. 4, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, 

Fig. 11, Fig. 12, Fig. 13. 

Frazier 2015, at Abstract, 2:25-41, 4:28-34, 11:46-12:28, 12:57-13:14, 

13:29-49, Fig. 2A, Fig. 2B, Fig. 3, Fig. 6, Fig. 7. 

Freiheit 2002, at Abstract, 3:31-44, 3:50-59, 4:11-50, 5:21-6:55, 7:8-16, 

7:17-26, 7:45-8:38, Fig. 1B, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 34 of 41
34 

# Claim Language Citations to Prior Art 

Friend 2003, at Abstract, 1:30-2:2, 2:15-25, 6:29-7:4, 9:15-17, 14-19, Fig. 

2, Fig. 3, Fig. 4, Fig. 15, Fig. 16. 

Gano 1996, at 2:32-61, 2:61-3:3, 3:11-14, 3:43-52, 4:6-35, 5:32-35, 5:38-

42, 5:44-50, 7:57-8:14, 8:56-9:19, Fig. 2A-C, Fig. 3. 

Gano 1997, at 1:37-42, 2:33-48, 3:18-26, 3:32-40, 4:32-5:7, Figs. 1-4. 

George 2011, at 4:6-18, 4:30-44, 5:9-19, 6:65-7:57, 7:64-12:11, Fig. 1, 

Fig. 2, Fig. 3. 

Glass, at 4:44-63, 6:14-18, 6:48-52, Fig. 3. 

Gramstad 2009, at Abstract, 1:13-2:4, 2:8-24, 3:11-53, 6:48-57, 7:42-48, 

8:41-53, Fig. 1A, Fig. 1B, Fig. 2A, Fig. 2B, Fig. 3, Fig. 4A, Fig. 4B. 

Gramstad 2011, at 7:59-8:7, 8:18-24, 8:28-54, 8:64-9:17, 9:26-10:19, 

10:34-37. 

Grigar 1987, at 1:58-66, 3:8-24, 4:11-41, 5:47-6:19, Fig. 1, Fig. 2. 

Hassel 2009, at Abstract, 1:21-2:19, 2:64-3:6, 3:58-67, 4:21-67, 5:12-6:3, 

6:19-40, 6:66-7:3, 7:16-8:3, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6A, 

Fig. 6B, Fig. 6C. 

Hinrichs 2004, at Abstract, 1:11-22, 1:41-67, 2:36-3:12, 3:15-30, 3:46-48, 

4:6-41, 6:16-7:25, 7:60-8:45, 9:8-55, 10:42-53, Fig. 1, Fig. 2, Fig. 3, Fig. 

4. 

Jackson 2010, at Abstract, 1:65-2:34, 3:5-4:6, 5:6-25, 5:66-6:2, Fig. 1, 

Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8. 

Jeffree 1999, at Abstract, 1:49-63, 2:1-6, 2:35-56, 3:26-56, 4:6-33, 4:39-

45, 4:62-6:2, 6:11-51, Fig. 4, Fig. 5, Fig. 6. 

Otis 1932, at 1:45-102, 2:14-77, Fig. 1, Fig. 2, Fig. 6. 

Mueller 1992, at 3:18-4:29, 4:56-5:15, 8:34-9:55, Fig. 1, Fig. 2, Figs. 3AF, Fig. 4. 

Rogers 1998, at 8:52-9:16. 

Snider 1996, at 6:21-63; Fig. 3.

39. The float tool recited in claim 36 wherein the 

sealed chamber is filled with a fluid having a 

lower specific gravity than that of the well 

fluid. 

Allen 1997, at 46-47. 

Ervin 2014, at Abstract, 2:38-52, 3:11-30, 4:6-12, 9:33-67, Fig. 1, Fig. 2, 

Fig. 3, Fig. 4, Fig. 5, Fig. 9, Fig. 10, Fig. 11. 

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 35 of 41
35 

# Claim Language Citations to Prior Art 

Farwell 1991, at Abstract, 1:13-23, 2:10-22, 3:19-44, 3:59-67, 6:42-56, 

7:50-8:12, Fig. 1, Fig. 2. 

Frazier 2014, at 3:27-4:21, 4:50-5:7, 5:35-38, 5:44-6:37, 6:66-7:55, 7:56-

8:19, 8:38-10:5, Fig. 1, Fig. 3, Fig. 4, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, 

Fig. 11, Fig. 12, Fig. 13. 

Frazier 2015, at Abstract, 2:25-41, 4:28-34, 11:46-12:28, 12:57-13:14, 

13:29-49, Fig. 2A, Fig. 2B, Fig. 3, Fig. 6, Fig. 7. 

Freiheit 2002, at Abstract, 3:31-44, 3:50-59, 4:11-51, 5:21-6:55, 7:8-16, 

7:17-26, 7:45-8:38, Fig. 1B, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6. 

Friend 2003, at Abstract, 1:14-17, 1:32-2:2, 2:13-25, 4:32-34, 6:29-7:4, 

9:4-17, 14-17. 

Gano 1996, at 2:32-61, 2:61-3:3, 3:11-14, 3:43-52, 4:6-35, 5:32-35, 5:38-

42, 5:44-50, 7:57-8:14, 8:56-9:19, Fig. 2A-C, Fig. 3. 

Gano 1997, at 1:37-42, 2:33-48, 3:18-26, 3:32-40, 4:32-5:7, Figs. 1-4. 

George 2011, at 4:6-18, 4:30-44, 5:9-19, 6:65-7:57, 7:64-12:11, Fig. 1, 

Fig. 2, Fig. 3. 

Glass, at 4:44-63, 6:14-18, 6:48-52, Fig. 3. 

Gramstad 2009, at Abstract, 1:13-2:4, 2:8-24, 3:11-53, 6:48-57, 7:42-48, 

8:41-53, Fig. 1A, Fig. 1B, Fig. 2A, Fig. 2B, Fig. 3, Fig. 4A, Fig. 4B. 

Gramstad 2011, at 7:59-8:7, 8:18-24, 8:28-54, 8:64-9:17, 9:26-10:19, 

10:34-37. 

Grigar 1987, at 1:58-66, 3:8-24, 4:11-41, 5:47-6:19, Fig. 1, Fig. 2. 

Hassel 2009, at 4:15-19, 5:12-6:3, 6:19-37, 6:55-60, 7:16-8:3, Fig. 1, Fig. 

2, Fig. 3, Fig. 4, Fig. 5, Fig. 6A, Fig. 6B, Fig. 6C. 

Hinrichs 2004, at Abstract, 1:11-22, 1:41-67, 2:36-3:12, 3:15-30, 3:46-48, 

4:6-41, 6:16-7:25, 7:60-8:45, 9:8-55, 10:42-53, Fig. 1, Fig. 2, Fig. 3, Fig. 

4. 

Jackson 2010, at 4:23-35, 4:55-5:5, Fig. 2, Fig. 3, Fig. 6, Fig. 7. 

Jeffree 1999, at Abstract, 1:49-63, 2:1-6, 2:35-56, 3:26-56, 4:6-33, 4:39-

45, 4:62-6:2, 6:11-51, Fig. 4, Fig. 5, Fig. 6. 

Keller 2010, at 3:4-44, 7:40-49, 7:59-8:14, 10:41-44, Fig. 1, Fig. 2A, Fig. 

2B, Fig. 3.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 36 of 41
36 

# Claim Language Citations to Prior Art 

Otis 1932, at 1:45-102, 2:14-77, Fig. 1, Fig. 2, Fig. 6. 

Mueller 1992, at 3:18-4:29, 4:56-5:15, 8:34-49, Fig. 1, Fig. 2, Figs. 3A-F, 

Fig. 4. 

Rogers 1998, at 8:52-9:16. 

Snider 1996, at 6:21-63; Fig. 3.

40. The float tool recited in claim 39 wherein the 

fluid in the sealed chamber is a gas. 

Allen 1997, at 46-47 

Frazier 2014, at 3:27-4:21, 4:50-5:7, 5:35-38, 5:44-6:37, 6:66-7:55, 7:56-

8:19, 8:38-10:5, Fig. 1, Fig. 3, Fig. 4, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, 

Fig. 11, Fig. 12, Fig. 13. 

Frazier 2015, at Abstract, 2:25-41, 4:28-34, 11:46-12:28, 12:57-13:14, 

13:29-49, Fig. 2A, Fig. 2B, Fig. 3, Fig. 6, Fig. 7. 

Freiheit 2002, at 4:45-51. 

Friend 2003, at Abstract, 1:14-17, 1:32-2:2, 2:13-25, 4:32-34, 6:29-7:4, 

9:4-17, 14-17. 

Gano 1996, at 2:32-61, 2:61-3:3, 3:11-14, 3:43-52, 4:6-35, 5:32-35, 5:38-

42, 5:44-50, 7:57-8:14, 8:56-9:19, Fig. 2A-C, Fig. 3. 

Gano 1997, at 1:37-42, 2:33-48, 3:18-26, 3:32-40, 4:32-5:7, Figs. 1-4. 

George 2011, at 4:6-18, 4:30-44, 5:9-19, 6:65-7:57, 7:64-12:11, Fig. 1, 

Fig. 2, Fig. 3. 

Glass, at 4:44-63, 6:14-18, 6:48-52, Fig. 3. 

Gramstad 2009, at Abstract, 1:13-2:4, 2:8-24, 3:11-53, 6:48-57, 7:42-48, 

8:41-53, Fig. 1A, Fig. 1B, Fig. 2A, Fig. 2B, Fig. 3, Fig. 4A, Fig. 4B. 

Gramstad 2011, at 7:59-8:7, 8:18-24, 8:28-54, 8:64-9:17, 9:26-10:19, 

10:34-37. 

Hassel 2009, at 4:15-19, 5:12-6:3, 6:19-37, 6:55-60, 7:16-8:3, Fig. 1, Fig. 

2, Fig. 3, Fig. 4, Fig. 5, Fig. 6A, Fig. 6B, Fig. 6C. 

Hinrichs 2004, at Abstract, 1:11-22, 1:41-67, 2:36-3:12, 3:15-30, 3:46-48, 

4:6-41, 6:16-7:25, 7:60-8:45, 9:8-55, 10:42-53, Fig. 1, Fig. 2, Fig. 3, Fig. 

4. 

Jackson 2010, at 4:23-35, 4:55-5:5, Fig. 2, Fig. 3, Fig. 6, Fig. 7. 

Jeffree 1999, at Abstract, 1:49-63, 2:1-6, 2:35-56, 3:26-56, 4:6-33, 4:39-

45, 4:62-6:2, 6:11-51, Fig. 4, Fig. 5, Fig. 6.

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 37 of 41
37 

# Claim Language Citations to Prior Art 

Keller 2010, at 2:14-34, 3:47-49, 8:1-7, Fig. 1, Fig. 2A, Fig. 2B. 

Otis 1932, at 1:45-102, 2:14-77, Fig. 1, Fig. 2, Fig. 6. 

Mueller 1992, at 3:36-51, 5:6-15, 8:34-49. 

Rogers 1998, at 8:52-9:16. 

Snider 1996, at 6:21-63; Fig. 3.

41. The float tool recited in claim 40 wherein the 

gas is air. 

See Limitation 25. 

42. The float tool recited in claim 36 further 

comprising a lower seal on the sealed 

chamber. 

See Limitation 14. 

43. The float tool recited in claim 42 wherein the 

lower seal is within a float shoe. 

See Limitation 15. 

46. The float tool recited in claim 36 wherein the 

sealed chamber is sized such that a portion of 

the sealed chamber is buoyant in the well 

fluid. 

Allen 1997, at 46-47. 

Freiheit 2002, at Abstract, 3:31-44, 3:50-59, 4:11-50, 5:21-6:55, 7:17-26, 

7:45-8:38, Fig. 1B, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6. 

Gano 1996, at Abstract, 3:4-9, 3:43-52, 7:36-55, 11:39-40, Fig. 2A, Fig. 

2B, Fig. 3. 

Gano 1997, at 1:37-42, 2:41-48, 3:18-26, 3:32-40, 4:32-5:7, Figs. 1-4. 

Grigar 1987, at 1:58-2:2, 3:46-50, 5:6-30, Fig. 1, Fig. 2. 

Keller 2010, at Abstract, 2:35-3:28, 6:3-20, 7:31-49. 

Mueller 1992, at 3:46-51, 5:25-45, 5:59-6:4, 8:34-49, Figs. 3A-F. 

Rogers 1998, at 4:2-5.

50.0 A method for installing casing in a wellbore 

containing a well fluid and having an upper 

vertical portion, a lower horizontal portion, 

and a bend portion connecting the upper and 

lower portions, the method comprising: 

See Limitation 22.0. 

50.1.a running a casing string into the wellbore, the 

casing string having an internal diameter that 

defines a fluid passageway between an upper 

portion of the casing string and a lower 

portion of the casing string, 

See Limitation 22.1.a. 

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 38 of 41
38 

# Claim Language Citations to Prior Art 

50.1.b the upper and lower portions of the casing 

string separated by a chamber sealed on one 

end by a rupture disc assembly and on an 

opposing end by a seal, the chamber 

containing a first fluid having a first specific 

gravity 

See Limitation 22.1.b. 

50.2.a wherein the rupture disc assembly comprises 

(i) a tubular member having an upper end and 

a lower end, the upper and lower ends 

connected in-line with the casing string and 

See Limitation 1.1. 

50.2.b (ii) a rupture disc having a rupture burst 

pressure and in sealing engagement with a 

region of the tubular member within the upper 

and lower ends, 

See Limitation 1.2. 

50.3.a wherein the rupture disc is configured to 

disengage from sealing engagement when 

exposed to a pressure greater than a hydraulic 

pressure in the casing string after the casing 

string has been positioned in the wellbore and 

See Limitation 28.2.a. 

50.3.b the region of the tubular member where the 

rupture disc is attached has a larger internal 

diameter than the internal diameter of the 

casing string and is parallel to the internal 

diameter of the casing string; and 

See Limitation 1.4 

50.4 floating at least a portion of the casing string 

containing the sealed chamber in the well 

fluid in the lower horizontal portion of the 

wellbore. 

See Limitation 22.3. 

51. The method recited in claim 50 further 

comprising: filling the casing string above the 

rupture disc assembly with a second fluid 

See Limitation 23. 

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 39 of 41
39 

# Claim Language Citations to Prior Art 

having a second specific gravity higher than 

the first specific gravity. 

52. The method recited in claim 51 wherein the 

first specific gravity is less than a specific 

gravity of the well fluid. 

See Limitation 24. 

53. The method recited in claim 51 wherein the 

first fluid is air. 

See Limitation 25. 

55. The method recited in claim 50 further 

comprising applying a pressure within the 

casing string greater than the hydraulic 

pressure in the casing string to disengage the 

rupture disc from sealing engagement 

Al-Anazi, at Abstract, Figs. 1-4, 1:6-8; 1:12-19; 1:36-54; 1:58-64; 2:3-22; 

2:28-34; 2:46-63; 3:3-9; 3:17-4:63; 5:3-7:40. 

Brandsdal 2009, at 7:7-31; Figs. 3, 4. 

Ervin 2014, at Abstract, 2:38-52, 3:11-30, 4:6-12, 9:33-67, Fig. 1, Fig. 2, 

Fig. 3, Fig. 4, Fig. 5, Fig. 9, Fig. 10, Fig. 11. 

Farwell 1991, at Abstract, 1:13-23, 2:10-22, 3:19-44, 3:59-67, 6:42-56, 

7:50-8:12, Fig. 1, Fig. 2. 

Frazier 2010, at 11:25-28, 12:22-30, Fig. 1, Fig. 2, Fig. 5, Fig. 6. 

Frazier 2014, at 3:27-4:21, 4:50-5:7, 5:35-38, 5:44-6:37, 6:66-7:55, 7:56-

8:19, 8:38-10:5, Fig. 1, Fig. 3, Fig. 4, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, 

Fig. 11, Fig. 12, Fig. 13. 

Frazier 2015, at Abstract, 2:25-41, 4:28-34, 8:60-67, 11:46-12:28, 12:57-

13:14, 13:29-49, Fig. 2A, Fig. 2B, Fig. 3, Fig. 6, Fig. 7. 

Freiheit 2002, at Abstract, 3:31-44, 3:50-59, 4:11-50, 5:21-6:55, 7:17-26, 

7:45-8:38, Fig. 1B, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6. 

Friend 2003, at Abstract, 1:30-2:2, 2:15-25, 6:29-7:4, 9:15-17, 14-19, Fig. 

2, Fig. 3, Fig. 4, Fig. 15, Fig. 16. 

Gano 1996, at 2:32-50, 2:61-3:3, 3:11-14, 3:43-52, 4:6-35, 5:32-35, 5:38-

42, 5:44-50, 7:15-35, 7:57-8:14, 8:62-9:19, 12:40-64, Fig. 2A-C, Fig. 3. 

Gano 1997, at 1:37-42, 4:32-5:7. 

George 2011, at 4:6-18, 4:30-44, 5:9-19, 6:65-7:57, 7:64-12:11, Fig. 1, 

Fig. 2, Fig. 3. 

Gramstad 2009, at 1:28-52, 2:19-24, 2:30-35, 2:43-50, 4:4-5:20, 6:31-47, 

7:6-26, 7:53-8:2, 8:7-15, 8:20-31, 8:41-53, Fig. 1A, Fig. 1B, Fig. 2A, Fig. 

2B, Fig. 3, Fig. 4A, Fig. 4B.

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40 

# Claim Language Citations to Prior Art 

Gramstad 2011, at 7:59-7, 8:11-17, 8:25-63, 9:1-25, 10:1-14, 10:20-34, 

10:31-33. 

Hassel 2009, at Abstract, 1:21-2:19, 2:64-3:6, 3:58-67, 4:21-67, 5:12-6:3, 

6:19-40, 6:66-7:3, 7:16-8:3, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6A, 

Fig. 6B, Fig. 6C. 

Hinrichs 2004, at Abstract, 1:41-54, 2:36-48, 3:19-24, 3:19-30, 6:16-7:25, 

7:60-8:45, 9:8-55, 10:42-53, Fig. 2, Fig. 3, Fig. 4. 

Jackson 2010, at Abstract, 1:65-2:34, 3:5-4:6, 5:6-25, 5:66-6:2, Fig. 1, 

Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8. 

Jeffree 1999, at Abstract, 1:49-63, 2:1-6, 2:35-56, 3:26-56, 4:6-33, 4:39-

45, 4:62-6:2, 6:11-51, Fig. 4, Fig. 5, Fig. 6. 

Lustig 1987, at Abstract, 1:52-59, 2:47-64, 3:25-41, 3:53-55, 3:61-68, 

4:48-67, Fig. 1, Fig. 2. 

Otis 1932, at 1:45-102, 2:14-77, Fig. 1, Fig. 2, Fig. 6. 

Mueller 1992, at 7:65-8:10, 8:50-9:3, 9:31-55, Fig. 1, Fig. 2, Figs. 3A-F, 

Fig. 5. 

Ross 2009, at ¶¶ [0018], [0020].

56.a. The method recited in claim 55 wherein the 

rupture disc is further configured to rupture 

when exposed to a rupturing force greater 

than the rupture burst pressure and 

See Limitation 29.a. 

56.b the pressure greater than the hydraulic 

pressure is less than the rupture burst pressure

See Limitation 29.b. 

57. The method recited in claim 56 further 

comprising applying a rupturing force to 

rupture the rupture disc. 

See Limitation 27. 

Case 6:20-cv-00277-ADA Document 31-1 Filed 09/16/20 Page 41 of 41