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Royalty Clerk

Texas oil lease · RRC district 03 · Lease 10641

Shut in

HANKAMER, E. C.

Hankamer, E. C. is an oil lease in Chambers County, Texas, operated by Gcows Operating LLC in the Stowell (Miocene 6250) field.

Oil lease dossier · 2 wells

0bbl oil, last 12 months
Operator
Gcows Operating LLC
County
Chambers County
Field
Stowell (Miocene 6250)
RRC lease
03-10641

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Where it sits

This county

Chambers CountyChambersOrangeHardinJeffersonLibertyGalvestonChambers County
Chambers County · RRC district 03Open Chambers County →
Oil in Jul 2026
0 bbl
Reporting to the state
since Jan 2020
Wells
2
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).

No oil produced in the last 12 months

The last month with output was Aug 2024, at 7 bbl.

  • Oil (bars, left axis)
  • Last 12 months
No oil produced in the last 12 monthsMonthly oil production for HANKAMER, E. C., Aug 2023 to Jul 2026. No oil produced in the last 12 months. The last month with output was Aug 2024, at 7 bbl.Last 12 months: 0 bblbbl per month05101520Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
No oil produced in the last 12 monthsMonthly oil production for HANKAMER, E. C., Aug 2023 to Jul 2026. No oil produced in the last 12 months. The last month with output was Aug 2024, at 7 bbl.Last 12 monthsbbl per month05101520Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, oil lease 10641, district 03. 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 once, most recently in Dec 2024

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 timeSawtooth Operating Co., Inc., Jan 2020 to Nov 2024; Gcows Operating LLC, Dec 2024 to Jul 20262020202120222023202420252026Changed Dec 2024Sawtooth Operating Co., Inc.Jan 2020 to Nov 2024Gcows Operating LLCDec 2024 to now
Operators of this lease over timeSawtooth Operating Co., Inc., Jan 2020 to Nov 2024; Gcows Operating LLC, Dec 2024 to Jul 20262020202120222023202420252026Changed Dec 2024Sawtooth Operating Co., Inc.Jan 2020 to Nov 2024Gcows Operating LLCDec 2024 to now

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

Wells

2 wells on this lease

Every well the Railroad Commission links to oil lease 10641 in district 03. The API number is the state’s ID for a well.
Wells on HANKAMER, E. C.
API numberWell no.Status
42-071-033111Active
42-071-033302Shut-in

SourceTexas Railroad Commission Wellbore Query, district 03, lease 10641.

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

    Gulfmark Energy, Inc. gathers it.

    100% of it, on the list since Jul 22, 2023

Companies that used to be listed: Sunoco Ptnrs. Mktg.&terminals LP (gathers it, until Jul 22, 2023); Plains Marketing, L.p. (gathers it, until Oct 3, 2019); Enterprise Crude Oil LLC (gathers it, until Oct 1, 2019); Plains Marketing, L.p. (gathers it, until Oct 1, 2019); Sunoco Ptnrs. Mktg.&terminals LP (gathers it, until Sep 16, 2019).

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
21 not plugged
Horizontal
0
First completion
Dec 17, 1965
Latest permit
–

A pooling certificate was filed

Your tract may share its production with neighbours in a pooled unit. The unit acres the operator uses to divide production can differ from the acreage on one permit.

Wells and acres on the permits for Hankamer, E. C.
API numberWell no.Acreson the permit
42-071-033111–
42-071-033302–

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 HANKAMER, E. C. 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 HANKAMER, E. C.
MonthOil producedbblOil soldbblWTI$ per bblHenry Hub$ per MMBtu
Jul 2026Gcows Operating00$80.46$2.89
Jun 2026Gcows Operating00$84.81$3.15
May 2026Gcows Operating00$102.13$2.94
Apr 2026Gcows Operating00$100.32$2.77
Mar 2026Gcows Operating00$91.38$3.04
Feb 2026Gcows Operating00$64.51$3.62
Jan 2026Gcows Operating00$60.04$7.72
Dec 2025Gcows Operating00$57.97$4.26
Nov 2025Gcows Operating00$60.06$3.79
Oct 2025Gcows Operating00$60.89$3.19
Sep 2025Gcows Operating00$63.96$2.97
Aug 2025Gcows Operating00$64.86$2.91
Jul 2025Gcows Operating00$68.39$3.20
Jun 2025Gcows Operating00$68.17$3.02
May 2025Gcows Operating00$62.17$3.12
Apr 2025Gcows Operating00$63.54$3.42
Mar 2025Gcows Operating00$68.24$4.12
Feb 2025Gcows Operating00$71.53$4.19
Jan 2025Gcows Operating00$75.74$4.13
Dec 2024Gcows Operating00$70.12$3.01
Nov 2024Sawtooth Operating00$69.95$2.12
Oct 2024Sawtooth Operating00$71.99$2.20
Sep 2024Sawtooth Operating00$70.24$2.28
Aug 2024Sawtooth Operating70$76.68$1.99
Jul 2024Sawtooth Operating00$81.80$2.07
Jun 2024Sawtooth Operating70$79.77$2.54
May 2024Sawtooth Operating70$80.02$2.12
Apr 2024Sawtooth Operating00$85.35$1.60
Mar 2024Sawtooth Operating80$81.28$1.49
Feb 2024Sawtooth Operating00$77.25$1.72
Jan 2024Sawtooth Operating70$74.15$3.18
Dec 2023Sawtooth Operating70$71.90$2.52
Nov 2023Sawtooth Operating70$77.69$2.71
Oct 2023Sawtooth Operating130$85.64$2.98
Sep 2023Sawtooth Operating130$89.43$2.64
Aug 2023Sawtooth Operating150$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).

Check your statements

Do your checks match this lease?

Upload your statements for HANKAMER, E. C.. We compare volumes, prices, deductions and timing with the state record and give you the exact question to ask Gcows Operating LLC.

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  • A month that was never paid
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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

OperatorGcows Operating LLCFieldStowell (Miocene 6250)CountyChambers County

Gcows Operating LLC in Chambers County

All Gcows Operating LLC leases →

Stowell (Miocene 6250) field

No other producing leases in this field are in our data yet.

Leases within 10 km

Found by the location of their wells.

Drilling permits within 10 km

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 10641, district 03, 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.