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Royalty Clerk

Texas oil lease · RRC district 8A · Lease 05919

Producing

DEAN, C. S. "K"

Dean, C. S. "K" is an oil lease in Cochran County, Texas, operated by Blackrock Operating, LLC in the Slaughter field. The Railroad Commission shows 43 bbl of oil in the 12 months through Jul 2026.

Oil lease dossier · 3 wells

43bbl oil, last 12 months
Operator
Blackrock Operating, LLC
County
Cochran County
Field
Slaughter
RRC lease
8A-05919

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Where it sits

This county

Cochran CountyCochranHockleyLambBaileyCochran County
Cochran County · RRC district 8AOpen Cochran County →
Oil in Jul 2026
6 bbl
Reporting to the state
since Jan 2020
Wells
3
Data through
Jul 2026

Production

Month by month, from the state record

What the Railroad Commission says this oil lease produced. Oil is in barrels (bbl). Gas is in thousand cubic feet (mcf).

Oil output over the last 12 months

43 bbl in the 12 months through Jul 2026, against 0 bbl in the 12 months before.

  • Oil (bars, left axis)
  • Last 12 months
Oil output over the last 12 monthsMonthly oil production for DEAN, C. S. "K", Aug 2023 to Jul 2026. Oil output over the last 12 months. 43 bbl in the 12 months through Jul 2026, against 0 bbl in the 12 months before.Last 12 months: 43 bblbbl per month02468Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output over the last 12 monthsMonthly oil production for DEAN, C. S. "K", Aug 2023 to Jul 2026. Oil output over the last 12 months. 43 bbl in the 12 months through Jul 2026, against 0 bbl in the 12 months before.Last 12 monthsbbl per month02468Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, oil lease 05919, district 8A. Reported through Jul 2026. The state revises recent months.

Gas disposition

Where the gas went

Every month the operator tells the state where each mcf of gas went, using a code. The code decides how your gas is paid.

No gas disposition reported for this lease

The operator has not reported where the gas went in the months we hold.

Operator history

Who has run this lease

The operator runs the wells and pays your royalty. When the operator changes, payments often slip for a month or two.

The operator changed 2 times, most recently in Jun 2026

If your statements skip or shrink around a change, ask the new operator's owner relations department whether the month is in suspense.

Operators of this lease over timeTrinity Bay Oil & Gas, Inc., Jan 2020 to Oct 2024; Crosstex Services, L.L.C., Nov 2024 to May 2026; Blackrock Operating, LLC, Jun 2026 to Jul 20262020202120222023202420252026Changed Nov 2024Changed Jun 2026Trinity Bay Oil & Gas, Inc.Jan 2020 to Oct 2024Crosstex Services, L.L.C.Nov 2024 to May 2026Blackrock Operating, LLCJun 2026 to now
Operators of this lease over timeTrinity Bay Oil & Gas, Inc., Jan 2020 to Oct 2024; Crosstex Services, L.L.C., Nov 2024 to May 2026; Blackrock Operating, LLC, Jun 2026 to Jul 20262020202120222023202420252026Changed Nov 2024Changed Jun 2026Trinity Bay Oil & Gas, Inc.Jan 2020 to Oct 2024Crosstex Services, L.L.C.Nov 2024 to May 2026Blackrock Operating, LLCJun 2026 to now

SourceTexas Railroad Commission Production Data Query, operator by month. Reported through Jul 2026.

Wells

3 wells on this lease

Every well the Railroad Commission links to oil lease 05919 in district 8A. The API number is the state’s ID for a well.
Wells on DEAN, C. S. "K"
API numberWell no.Status
42-079-003956Active
42-079-003967WActive
42-079-003978Active

SourceTexas Railroad Commission Wellbore Query, district 8A, lease 05919.

Who buys and gathers

Who moves and buys this lease's production

The operator files a Form P-4 with the Railroad Commission naming the companies authorised to gather and buy the oil and gas. The buyer's price is the one your royalty is figured on.

  • Oil

    Sentinel Transportation, LLC gathers it.

    100% of it, on the list since Jun 1, 2026

Companies that used to be listed: Bml, Inc. B (gathers it, until Jun 1, 2026); Sentinel Transportation, LLC (gathers it, until Nov 1, 2024).

SourceRailroad Commission of Texas, Form P-4 file, dated Sep 24, 2026 (source). A listed company is authorised to move or buy the production; the state does not say what it paid.

Who buys my oil and gasIs my oil price fair?

Unit and wells

What the drilling permits say

Acres and wells as the operator filed them on its Railroad Commission drilling permits. Your decimal is your net acres over the unit acres, so this is the number to hold your division order against.
Wells on the permits
74 not plugged
Horizontal
0
First completion
Oct 27, 1952
Latest permit
–

7 wells are listed on this lease

Each well can have its own unit. The decimal for one well does not have to equal the decimal for another.

Wells and acres on the permits for Dean, C. S. "K"
API numberWell no.Acreson the permit
42-079-003934–
42-079-003934W–
42-079-003956–
42-079-003967–
42-079-003967W–
42-079-003978–
42-079-802913–

SourceRailroad Commission of Texas, drilling permits and wellbore file, Sep 26, 2026 (source 1, source 2). The acres are what the operator filed; they are not a survey.

Check my decimal against the unit

Estimator

Estimate your royalty for this lease

A rough check before you look at a statement: the state volumes times your decimal, priced at WTI and Henry Hub.

Estimator

What could your check be?

Your decimal interest is the small number on your division order that says what share of the whole lease (8/8ths) is yours. Type it in and we apply it to what the state says DEAN, C. S. "K" sold each month.

For example 0.00097656, or a fraction like 1/1024.

Your estimate appears here

Enter your decimal to see an estimated royalty for each of the last 12 months this lease reported. Nothing you type leaves your browser.

An estimate, not your check

It ignores gathering and processing fees, taxes, plant products and the price your operator actually gets, so your statement will differ. Use it as a ceiling to compare against.

Ledger

36 months, newest first

Compare these numbers with your statements. Your share of a month is the “Oil sold” volume times your decimal. Scroll sideways on a phone.
Monthly production, disposition and prices for DEAN, C. S. "K"
MonthOil producedbblOil soldbblWTI$ per bblHenry Hub$ per MMBtu
Jul 2026Blackrock Operating,60$80.46$2.89
Jun 2026Blackrock Operating,80$84.81$3.15
May 2026Crosstex Services,50$102.13$2.94
Apr 2026Crosstex Services,50$100.32$2.77
Mar 2026Crosstex Services,30$91.38$3.04
Feb 2026Crosstex Services,20$64.51$3.62
Jan 2026Crosstex Services,30$60.04$7.72
Dec 2025Crosstex Services,50$57.97$4.26
Nov 2025Crosstex Services,60$60.06$3.79
Oct 2025Crosstex Services,00$60.89$3.19
Sep 2025Crosstex Services,00$63.96$2.97
Aug 2025Crosstex Services,00$64.86$2.91
Jul 2025Crosstex Services,00$68.39$3.20
Jun 2025Crosstex Services,00$68.17$3.02
May 2025Crosstex Services,00$62.17$3.12
Apr 2025Crosstex Services,00$63.54$3.42
Mar 2025Crosstex Services,00$68.24$4.12
Feb 2025Crosstex Services,00$71.53$4.19
Jan 2025Crosstex Services,00$75.74$4.13
Dec 2024Crosstex Services,00$70.12$3.01
Nov 2024Crosstex Services,00$69.95$2.12
Oct 2024Trinity Bay00$71.99$2.20
Sep 2024Trinity Bay00$70.24$2.28
Aug 2024Trinity Bay00$76.68$1.99
Jul 2024Trinity Bay00$81.80$2.07
Jun 2024Trinity Bay00$79.77$2.54
May 2024Trinity Bay00$80.02$2.12
Apr 2024Trinity Bay00$85.35$1.60
Mar 2024Trinity Bay00$81.28$1.49
Feb 2024Trinity Bay00$77.25$1.72
Jan 2024Trinity Bay00$74.15$3.18
Dec 2023Trinity Bay00$71.90$2.52
Nov 2023Trinity Bay00$77.69$2.71
Oct 2023Trinity Bay00$85.64$2.98
Sep 2023Trinity Bay00$89.43$2.64
Aug 2023Trinity Bay00$81.39$2.58

No report filed More than 3% of gas flared

SourceVolumes: Texas Railroad Commission Production Data Query, reported through Jul 2026. Prices: EIA WTI Cushing spot and Henry Hub spot, monthly, through Aug 2026. “Gas sold” is gas sent to a transmission line (code 2) or a plant (code 3).

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Around this lease

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Everything on this page connects to the operator, field and county records. Start from any of them.

This lease belongs to

OperatorBlackrock Operating, LLCFieldSlaughterCountyCochran County

Blackrock Operating, LLC in Cochran County

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Slaughter field

All leases in this field →

Leases within 10 km

Found by the location of their wells.

New drilling permits in Cochran County

We do not have coordinates for this lease, so these are the newest permits in its county.

How to read this page

Questions owners ask

What is a decimal interest?

It is your share of the whole lease, written as a decimal. A 1/4 royalty on 5 net acres in a 1,280-acre unit is 1/4 × 5 ÷ 1,280 = 0.00097656. Your division order states yours.

How do I use this page to check a royalty check?

Take the “Oil sold” volume for the month the check covers and multiply it by your decimal. The answer should match the barrels on your statement. If it does not, upload the statement and we will show where the two differ.

Why is the newest month Jul 2026?

The Railroad Commission publishes production two to three months after the fact and revises recent months. We re-pull the latest three months on every update.

Does this page show what my check should be?

No. It shows what the state recorded. Prices, fees and taxes depend on your lease and on what your operator gets for the oil and gas. The estimator gives a ceiling to compare against.

Sources and method

Where these numbers come from

  • Production and disposition by month: Texas Railroad Commission Production Data Query, oil lease 05919, district 8A, reported through Jul 2026.
  • Wells: Texas Railroad Commission Wellbore Query.
  • Prices: U.S. Energy Information Administration, WTI Cushing spot and Henry Hub spot, monthly.
  • Page updated Sep 28, 2026.

We show the state’s numbers as filed. Where the state has no report for a month, we say so instead of guessing.