# US 6,719,479 B1 · Breech lock wireline connector

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- Number: US 6,719,479 B1
- Document ID: US6719479B1
- Status: Granted
- Kind: B1
- Application number: 09/730,544
- Filed: 2000-12-07
- Granted: 2004-04-13
- Earliest claimed: 2000-12-07
- Assignees: Tuboscope I/P, Inc.
- Inventors: Brent Marsh; Robert Parker
- Web page: https://patentgrep.com/patent/US6719479B1

## CPC

- E21B 17/046: with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
- Y10T 403/597: Swiveled bolt
- Y10T 403/599: Spring biased manipulator
- Y10T 403/602: by separate spring
- Y10T 403/7005: Lugged member, rotary engagement
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A breech lock wireline connector for connecting tools to a wireline inserted into a well bore. The connector has a housing with an axially movable plunger within the housing and each being in axial alignment. A spring is used for biasing the plunger axially toward and into engagement with the breech pin. The breech pin is selectively engageable and disengageable into lock and unlock positions, respectively, with the plunger and the housing. The plunger rotates the breech pin axially between the lock and unlock positions. A latch is provided for latching the plunger and breech pin in the lock position.

## Claims

### Claim 1

A breech lock wireline connector for connecting wireline operated toolstrings inserted into a well bore, comprising:
a housing;
an axially movable plunger within said housing;
an axially movable breech pin within said housing in axially alignment with said plunger;
spring means for biasing said plunger axially toward and into engagement with said breech pin;
said breech pin having means for selectively engaging and disengaging into lock and unlock positions, respectively, with said plunger and with said housing;
means on said breech pin for rotating said plunger axially between said lock and unlock positions; and
latching means for latching said plunger and breech pin in said lock position.

### Claim 2 (depends on 1)

The connector of claim 1, wherein said means for rotating said plunger includes a tang on said plunger adapted for selective engagement in a slot in said breech pin.

### Claim 3 (depends on 2)

The connector of claim 2, wherein said latching means includes a slot in said plunger adapted to engage a pin upon rotation of said breech pin to said lock position.

### Claim 4 (depends on 3)

The connector of claim 3, wherein said latching means further includes detent means between said housing and said plunger.